t controller

7/13/2019 T Controller

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4156K and 4166K Series WizardII

Temperature ControllersContents

Introduction 2.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Scope of Manual 2.. . . . . . . . . . . . . . . . . . . . . . . . . . . .Description 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Specifications 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installation 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Standard Installation 2.. . . . . . . . . . . . . . . . . . . . . . . . .

Panel Mounting 2.. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Wall Mounting 2.. . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pipestand Mounting 2.. . . . . . . . . . . . . . . . . . . . . . . .Actuator Mounting 2.. . . . . . . . . . . . . . . . . . . . . . . . .

Piping 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Supply Pressure 4.. . . . . . . . . . . . . . . . . . . . . . . . . . . .Vent 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Remote Set Point 6.. . . . . . . . . . . . . . . . . . . . . . . . . . .Temperature Sensing Bulb, Bushings,

Thermowells 6.. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Controller Operation 7.. . . . . . . . . . . . . . . . . . . .Description of Temperature Baths 7.. . . . . . . . . . . . .Proportional-Only Controllers 8.. . . . . . . . . . . . . . . . .

Adjustments 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Calibration of Proportional-Only Controllers 10.. .

Startup: Proportional-Only Controllers(General Tuning Guidelines) 11.. . . . . . . . . . . .

Proportional-Plus-Reset Controllers 12.. . . . . . . . .Adjustments 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . .Calibration of Proportional-Plus-Reset

Controllers 14.. . . . . . . . . . . . . . . . . . . . . . . . . . .Startup: Proportional-Plus-Reset Controllers

(General Tuning Guidelines) 15.. . . . . . . . . . . .

Differential Gap Controllers 16.. . . . . . . . . . . . . . . . .Adjustments 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . .Bench Calibration of Differential Gap

Controllers 16.. . . . . . . . . . . . . . . . . . . . . . . . . . .Startup: Differential Gap Controllers

(General Tuning Guidelines) 17.. . . . . . . . . . . . .

Principle of Operation 17.. . . . . . . . . . . . . . . . .Temperature Element Assembly 17.. . . . . . . . . . . .Proportional Controllers 18.. . . . . . . . . . . . . . . . . . . .Proportional-Plus-Reset Controllers 19.. . . . . . . . .Controllers with Anti-Reset Windup 19.. . . . . . . . . .Differential-Gap Controllers 19.. . . . . . . . . . . . . . . . .

Figure 1. Controller Yoke-Mountedon Actuator of Control Valve

W3525-1/IL

Maintenance 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . .Preventative Maintenance Procedures 21.. . . . . . .Replacing the Temperature Element 22.. . . . . . . . .Changing the Proportional, Reset, or

Differential Relief Valve 22.. . . . . . . . . . . . . . . . . .Changing Action 22.. . . . . . . . . . . . . . . . . . . . . . . . . .

Proportional-Only to a Differential GapController 22.. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Direct to Reverse Action 22.. . . . . . . . . . . . . . . . . .Relay Assembly Maintenance 23.. . . . . . . . . . . . . .

Replacement: Relay Assembly 23.. . . . . . . . . . . .Disassembly: Relay Assembly 23.. . . . . . . . . . . . .Assembly: Relay Assembly 24.. . . . . . . . . . . . . . .

Changing Output Signal Range 24.. . . . . . . . . . . . .

Wizard is a mark owned by Fisher Controls International, Inc.

Instruction ManualForm 5182December 1993 4156K and 4166K Series


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4156K and 4166K Series

2

Parts Ordering 25.. . . . . . . . . . . . . . . . . . . . . . . . . .

Parts Kits 26.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Parts List 26.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Subassemblies 26. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Controller and Controller Subassembly 26.. . . . . . .Relay 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Mounting Parts 33.. . . . . . . . . . . . . . . . . . . . . . . . . . .

Introduction

Scope of Manual

This instruction manual provides installation, operat-ing, maintenance, and parts information for the 4156Kand 4166K Series WizardII temperature controllers(figure 1). Refer to separate instruction manuals for

information regarding the control valve, actuator, andaccessories.

Description

The 4156K and 4166K Series pneumatic temperaturecontrollers use a temperature bulb immersed in theprocess fluid to increase or decrease pressure in thetemperature elements Bourdon tube as the tempera-ture of the process fluid increases or decreases. Thecontroller output is a pneumatic signal that operates afinal control element to minimize deviation betweenthe process temperature and an operator-adjusted set

point.

Only personnel qualified through training or experienceshould install, operate, and maintain this controller. Ifthere are any questions concerning these instructions,contact your Fisher sales office or sales representativebefore proceeding.

Specifications

Specifications for the 4156K and 4166K Series con-trollers are listed in table 1. Table 2 explains availableconfigurations and options.

Installation

Standard Installation

The controller is normally mounted with the case/coververtical as shown in figure 1. If the controller is to be

installed in any other position, be sure that the ventopening, shown in figure 2, is facing downward. (Note:see right side view showing pipestand mounting.)

Panel Mounting

Cut a hole in the panel surface according to the di-mensions shown in figure 2. Remove cap screws (key252), brackets (key 251, figure 2), and vent (key 15).Slide the controller into the cutout and re-attach thebrackets. Tighten the cap screw located in the centerof each bracket to draw the case snugly and evenlyaround the panel. Reinstall the vent unless the ventconnection is to be piped away.

Wall Mounting

Drill four holes in the wall using the dimensions shownin figure 2. In the bracket (key 251, figure 2) are11/32-inch (8.7 mm) diameter holes. Back out the capscrew located in the center of each bracket. (Note:The screws are used for panel mounting but are notrequired for wall mounting.) If the capillary tube is torun through the wall, drill a hole in the wall largeenough to accept the temperature bulb (see figure 4for bulb dimensions, and figure 5 for bushing orthermowell dimensions). See figure 2 (BACK VIEW)for the location of the capillary tube connection in theback of the case.

Mount the controller to the bracket using four capscrews (key 252). Attach the bracket to the wall, usingsuitable screws or bolts.

Pipestand Mounting

Attach the spacer spools (key 228) and the mountingplate to the controller with cap screws, lock washers,and nuts (keys 215, 221, and 216, figure 2). Attach thecontroller to a 2-inch (nominal) pipe with pipe clamps(key 250).

Actuator Mounting

Controllers specified for mounting on a control valveactuator are mounted at the factory (see figure 3). Ifthe controller is ordered separately for installation on acontrol valve actuator, mount the controller accordingto the following instructions.


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3

Table 1. Specifications

Available Configurations

See table 2

Input Signal(1)

Type:Temperature between 0F and 1000F or0C and 500C; see table 3 for available ranges

Minimum Span(1): 100F or 100C

Maximum Span(1):1000F or 500C

Output Signal(1)

Proportional or Proportional-Plus-Reset.Controllers:

3 to 15 psig (0.2 to 1.0 bar) or 6 to 30 psig (0.4 to 2.0 bar) pneumatic pressuresignal

Differential Gap Controllers:

0 and 20 psig (0 and 1.4 bar) or 0 and 35 psig (0 and 2.4 bar) pneumatic pressuresignal

Action(2):Control action is field reversible between direct (increasing sensed temperature producesincreased output signal, and reverse (increasedsensed temperature produces decreasing outputsignal). The suffix R is added to the type number ofa construction specified for reverse action

Supply Pressure

See table 4

Steady-State Air Consumption(1,3)

See table 4

Supply and Output Connections

1/4-inch NPT female

Maximum Allowable Pressure in Closed Vessel(For Temperature Bulb)

3/8-inch (10 mm) Temperature Bulb:1000 psig(69 bar) at 100F (38C)

9/16-inch (14 mm) Temperature Bulb:500 psig(34.5 bar) at 100F (38C)

Proportional Band(1)Adjustment

Recommended for Proportional orProportional-Plus-Reset Controllers

Full output pressure change adjustable over percentof sensing element temperature range as follows:

Proportional:

3% to 100% [3 to 15 psig (0.2 to 1.0 bar)] or

6% to 100% [6 to 30 psig (0.4 to 2.0 bar)]

Proportional-Plus-Reset:

6% to 200% [3 to 15 psig (0.2 to 1.0 bar)] or

12% to 200% [6 to 30 psig (0.4 to 2.0 bar)]

Common Signal Pressure Conversions

See table 5

Differential Gap Controllers

Recommended Proportional Band Adjustment:Full output pressure change adjustable from 15% to100% of sensing element temperature range

Reset(1)Adjustment (Types 4166K and 4166KFControllers Only)

Adjustable from 0.01 minutes to more than 74minutes per repeat (from 100 repeats per minute toless than 0.0135 repeats per minute)

Performance

Repeatability(1):0.5% of sensing element temper-ature span

Dead Band(1)(Except Differential Gap Control-lers(3)):0.1% of output span

Time Constant of Temperature Bulb:9 to 18seconds (bare bulb in agitated liquid)

Vibration Sensitivity:Unaffected at usual motorand turbine speeds

Remote Set Point Pressure Signal

Provide a 3 to 15 psig (0.2 to 1.0 bar) remote pres-sure signal for a controller with a 3 to 15 psig (0.2 to1.0 bar) output signal or a 6 to 30 psig (0.4 to

2.0 bar) for a controller with a 6 to 30 psig (0.4 to2.0 bar) output signal

Ambient Operating Temperature Limits

Controller Case:The controller case cannot beexposed to process temperatures above 160F(71C) for a standard construction, or 220F(104C) for a high temperature construction. If nec-essary, provide external cooling to reduce the tem-perature exposure of the controller Standard Construction:40 to 160F (40to71C) High Temperature Construction:0 to 220F(18to 104C)

Typical Ambient Temperature Operating Influence

Proportional Control only:3% of output span foreach 50F (28C) change in temperature for a con-troller set at 100% proportional band

Reset Control only:2% of output span for each50F (28C) change in temperatures for a controllerset at 100% proportional band

Continued


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4

Table 1. Specifications (Continued)

Process Temperature Indication

Standard on all controllers and calibrated for thetemperature range ordered

Exterior TubingStandard:1/4-inch (6.4 mm)

Optional: 3/8-inch (9.5 mm)

Capillary Lengths

Standard:Available in 10-foot and 15-foot (3 m and4.5 m) lengths

Optional: Consult your Fisher sales office or salesrepresentative for other lengths

Approximate Weight

18 pounds (8.2 kg)1. These terms are defined in ISA Standard S5.1-1979.2. With direct action, an increasing temperature procedures an increasing output signal. With reverse action, an increasing sensed temperature produces a decreasing output signal.3. An adjustable differential gap (differential gap controllers) is equivalent to an adjustable deadband.

Figure 2. Panel, Wall, and Pipestand Mounting

15A7451-C15A7252-F

B1210-3/IL

Mounting parts for various actuator types and sizesvary. Two typical actuator-mounted installations areshown in figure 3. See the parts list for parts requiredby the specific actuator type and size involved. Attachthe spacer spools (key 228) and the mounting plate(key 213) to the controller with machine screws, lockwashers, and nuts (keys 215, 221, and 216).

Attach the mounting plate to the actuator yoke withcap screws (key 222) and, if needed, spacer spools.On some designs, the mounting bracket is attached tothe actuator diaphragm casing rather than to the yoke.

Piping

All pressure connections on 4156K and 4166K Seriescontrollers are 1/4-inch NPT female. Use 1/4-inch

(6 mm) or 3/8-inch (10 mm) pipe or tubing for supply,output, and remote set point piping. Use 1/2-inch(13 mm) pipe for the remote vent pipe, if one is re-quired. Locations of pressure connections are shownin figure 2.

Supply Pressure

WARNING

Personal injury or property damage mayoccur from an uncontrolled process ifthe supply medium is not clean, dry, oil-free, or a non-corrosive gas. Industryinstrument air quality standards


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5

Table 2. Available Configuration

TypeNumber(1)

Proportional-Only

Proportional-Plus-Reset

Differential

Gap

Anti-Reset

Windup

4156K4156KS4166K4166K

X

XX

X

X

1, Reverse-acting constructions are designated by an R suffix in the type number.

Table3. Temperature Ranges of Temperature ElementAssemblies(1)

OVERRANGE LIMITS(2)

TEMPERATURESPAN, F

TEMPERATURERANGE, F

10 Foot(3.1 m)

CapillaryTube

15 Foot(4.6 m)

CapillaryTube

F F

1000 to 10050 to 150

100 to 200

240250250

200225250

150 50 to 200 400 370

200

0 to 20050 to 250

100 to 300200 to 400

500450400450

470435400440

300 0 to 300 500 400

400 0 to 400 790 780

600 0 to 600 800 870

800 0 to 800 1000 1000

1000 0 to 1000 1200 1200

TEMPERATURESPAN, C

TEMPERATURERANGE, C

C C

100 0 to 100 200 200

150 0 to 150 200 200

200 0 to 200 340 330

250 0 to 250 500 500

300 0 to 300 500 500

400 0 to 400 500 500

500 0 to 500 600 600

1. Class IIIB per SAMA Standard RC6-10-1963.2. If these limits are exceeded, a permanent zero shift may result.

describe acceptable dirt, oil, and mois-ture content. Due to the variability in na-ture of the problems these influencescan have on pneumatic equipment,Fisher Controls has no technical basisto recommend the level of filtrationequipment required to prevent perfor-mance degradation of pneumatic equip-ment. A filter or filter regulator capableof removing particles 40 microns in di-ameter should suffice for most applica-tions. Use of suitable filtration equip-ment and the establishment of amaintenance cycle to monitor its opera-tion is recommended.

Figure3. Actuator Mounting

44A0745-ADH2431-A

A2201-2/IL

Supply pressure must be clean, dry air or noncorrosivegas. Use a suitable supply pressure regulator and filterto reduce the supply pressure source to the normaloperating supply pressure shown in table 4. Connectsupply pressure to the SUPPLY connection at theback of the case.

Vent

WARNING

If a flammable, toxic, or reactive gas isto be used as the supply pressure me-dium, personal injury or property dam-age could result from fire or explosionof accumulated gas or from contact witha toxic, or reactive gas. The instrumentcase and cover assembly does not form


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6

Table 4. Supply Pressure Requirements

OUTPUTSIGNAL RANGE

NORMAL OPERATINGSUPPLY PRESSURE(1)

MAXIMUM ALLOWABLESUPPLY PRESSURE

TO PREVENTINTERNAL

STEADY-STATE AIR CONSUMPTIONSCFH OF AIR AT 60F AND 14.7 PSIA

(NORMAL m3/hr OF AIR AT 0C AND1.01325 BAR)

PART DAMAGE(2) Minimum(3) Maximum(4)

3 to 15 or 0 and 20 (differential gap) 20 40 4.2 27

Psig 6 to 30 or 0 and 35 (differential gap) 35 40 7 42

0.2 to 1.0 or 0 and 1.4 (differential gap) 1.4 2.8 0.12 0.72ar

0.4 to 2.0 or 0 and 2.4 (differential gap) 2.4 2.8 0.17 1.1

1. If this pressure is exceeded, control may be impaired.2. If this pressure is exceeded, damage to the controller may result.

3. At proportional band setting of 0 or 10.4. At proportional band setting of 5.

a gas-tight seal, and when the assemblyis enclosed, a remote vent line, ade-quate ventilation, and necessary safetymeasures should be used. A remotevent pipe alone cannot be relied upon toremove all hazardous gas. Vent line pip-ing should comply with local and re-gional codes and should be as short as

possible with adequate inside diameterand few bends to reduce case pressurebuildup.

CAUTION

When installing a remote vent pipe, takecare not to overtighten the pipe in thevent connection. Excessive tighteningwill damage the threads in the connec-tion.

The vent (key 15, figure 2) or the end of a remote ventpipe must be protected against the entrance of all for-eign matter that could plug the vent. Use 1/2-inch(13 mm) pipe for the remote vent pipe, if one is requi-red. Check the vent periodically to be certain it has notbecome plugged.

Remote Set Point

Remote set point is only available on proportional-onlycontrollers. Connect a remote set point panel loader ora regulator to the remote set point connection on theright side of the housing. The specifications table pro-

vides the pressure range requirements for the panelloader or pressure regulator that matches the sensingelement range.

The panel loader or regulator used for remote set pointadjustment must have an adjustment output of 3 to 15psig (0.2 to 1.0 bar) for a controller output signal rangeof 3 to 15 psig (0.2 to 1.0 bar) or 6 to 30 (0.4 to 2.0bar) for a controller output signal range of 6 to 30 (0.4to 2.0 bar).

Table 5. Common Signal Pressure Conversions

PSI kPa bar kg/cm2 Mpa

35679

20(1)

3540(1)

5060

0.2(2)

0.30.40.50.6

0.20.40.40.50.6

0.020.030.040.050.06

1112

1415

18

7580

95100(1)

125

0.80.8

1.01.0(2)

1.2

0.80.8

1.01.0(3)

1.3

0.070.08

0.090.10

0.12

2022252730

140150170185

200(1)

1.41.51.71.9

2.0(3)

1.41.51.81.92.0

0.140.150.170.180.20

3233355080

220230240345550

2.22.32.43.45.5

2.22.32.53.55.6

0.220.230.240.340.55

100150

6901035

6.910.3

7.010.5

0.691.03

1. Values as listed in ANSI/ISA S7.4.

2. Values as listed in IEC Standard 382.3. Values rounded to correspond with kPa values.

Temperature Sensing Bulb, Bushings,Thermowells

WARNING

The thermowell must be able to with-stand the effects of process pressureand velocity (see tables 6 and 7). Failureof the thermowell may result in personalinjury or equipment damage caused by

escaping process fluid.Process temperature is sensed by a temperature bulbimmersed in the process fluid. When the temperaturebulb (figure 4) is to be used within a closed vessel,bushings are available to attach the bulb to the vessel.The bushing (dimensions are shown in figures 5)penetrates the vessel and the temperature bulbscrews into the bushing. If the process temperatureexceeds the limits of the temperature bulb, or if theprocess fluid is corrosive, a thermowell (dimensions


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7

TEMPERATURE SPAN DIMENSIONSAMASTYLE

J X YF C

Inch mm Inch mm Inch mm

Adjustable Union

0-100200-400

0-1000-150

17.50 445 5.70 145 0.38 10

(Standard Construction) 0-4000-1000

0-2000-500

23.00 584 7.00 178 0.56 14

Figure 4. Temperature Element Dimensions

A6280/IL

are shown in figure 5) penetrates the vessel and thetemperature bulb screws into the thermowell. Table 6lists the maximum process pressure/temperatureratings for thermowells. Table 7 lists velocity ratingsfor thermowells for process fluid velocities such asencountered if the thermowell is mounted in a pipe.

With the controller case mounted so the temperaturebulb reaches the process, screw the bulb into thebushing or thermowell.

If the temperature bulb is to be installed in a pipe, pro-cess velocity is an important consideration. Install thebulb where the process temperature is to be mea-sured, keeping in mind the velocity limits shown intable 7. Tapered thermowells, built to withstand evengreater process velocities, are also available.

Controller Operation

Description of Temperature Baths

The calibration procedure requires that the process

temperature be simulated. A temperature bath (liquidor sand, depending on temperature requirements) isrecommended. It is recommended that the tempera-ture able to cover 0 to 100 percent of the temperatureelement input range for the most accurate calibration.

If available, two baths will simplify and speed up thecalibration process. The minimum bath should be pre-set at 0 percent of input range and the maximum bathshould be set at 100 percent of input range.


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8

Bushings without Lagging

TEMPERATURE DIMENSION

BULB DIAMETER1

B C

Inch mmA

Inch mm Inch mm

3/8 10 1/2-14 NPSM 0.44 11 0.44 11

9/16 14 1-20 UNEF 0.75 19 0.63 16

1. Seat area per SAMA Standard RC-17-10-1963.

Bushings with Lagging

TEMPERA

TUREDIMENSION

BULB

DIAMETER A(1)B C D E

Inch mm Inch mm Inch mm Inch mm Inch mm

3/8 101/2-14NPSM

0.44 11 0.47 12 4.44 113 0.44 11

9/16 141-20

UNEF0.75 19 0.66 17 4.75 121 0.63 16

1. Seat area per SAMA Standard RC-17-10-1963.

Thermowell Dimensions

DIMENSIONTEMPERATURE

BULBDIAMETER A

BC(1)

U(InsertionLength)

Inch mm Inch mm Inch mm

3/8 10 3/4-14NPT

0.77 20 1-20UNEF-2B

7.510.516

191267406

9/16 143/4-14NPT

0.88 221-20

UNEF-2B

7.5(2)

10.51624

191267406559

1. Seat area per SAMA Standard RC-17-10-1963. Lagged thermowell only.

Also, provide a means of measuring bath temperature.Use a thermometer or resistance temperature detector(RTD).

Proportional-Only Controllers

This section describes the adjustments andprocedures for calibration and startup. Adjustmentlocations are shown in figure 6 unless otherwisespecified. All adjustments (except remote set point)must be made with the cover open. When theadjustments and calibration procedures are complete,close and latch the cover.

Figure5. Bushing and Thermowell Dimensions

A3240-2*/IL

B

A

C

3/4-14 NPT

3/4-NPT

D

E

B

A

C

B

C

C

U

U

NOTES:

TOLERANCES FOR THIS DIMENSION ARE AS FOLLOWS:

0.06 INCH (1.5 mm) WHEN LENGTH IS 12 INCHES (305 mm) OR LESS

0.125 INCH (3.2 mm) WHEN LENGTH IS GREATER THAN 12 INCHES (305 mm)1-1/8 INCH HEX FOR 3/8-INCH TEMPERATURE BULB;

1-1/4 INCH HEX FOR 9/16-INCH TEMPERATURE BULB

1

2

To better understand the adjustments and overalloperation of the controller, refer to the Principle ofOperation section in this manual for proportional-onlycontrollers. Refer also to the schematic diagram forproportional-only controllers (figure 13).

Adjustments

Adjustment: Manual Set Point

The temperature setting knob is constructed with awhite triangular indicator that moves along the edge ofthe TEMP SETTING dial. The white triangle is at-tached to the black knob surrounding the dial. Turn the


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9

Table 6. Maximum Process Pressures for Thermowells

TEMPERATURE TEMPERATURE F (C)THERMOWELL

SIZE

BULB

DIAMETERMATERIAL 70 (21) 200 (93) 400 (204) 600 (316) 800 (427) 1000 (538)

Inch mm Psig Bar Psig Bar Psig Bar Psig Bar Psig Bar Psig Bar

1/2 NPT 3/8 10

BrassCarbon steel304 SST316 SSTMonel

28103160412041203820

193.9218.0284.3284.3263.6

25303040374041203530

174.6209.8258.1284.3243.6

4402900340038503250

30.4200.1234.6265.7224.3

2770328037603210

191.1226.3259.4221.5

2110318036803130

145.6219.4253.9215.9

27503080

189.8212.5

3/4 NPT 3/8 10

BrassCarbon steel

304 SST316 SSTMonel

50005200

700070006500

345.0358.8

483.0483.0448.5

42005000

620070006000

289.8345.0

427.8483.0414.0

10004800

560064005400

69.0331.2

386.4441.6372.6

4600

540062005300

317.4

372.6427.8365.7

3500

520061005200

241.5

358.8441.6358.8

45005100

310.5351.9

3/4 NPT 9/16 14

Carbon steel304 SST316 SSTMonel

2310347034703070

159.4239.4239.4211.8

2030308034702510

140.1212.5239.4173.2

1900252032402460

131.1173.9223.6169.7

1820243031502410

125.6167.7217.4166.3

1430185031002150

98.7127.7213.9148.4

16302600

112.5179.4

Table 7. Maximum Process Fluid Velocities(1)for Thermowells

TEMPERATURE INSERTION LENGTH(2), INCHES (mm)THERMOWELL

SIZE

BULBDIAMETER MATERIAL 7.5 (191) 10.5 (267) 16 (406) 24 (610)

Inch mm Feet/s m/s Feet/s m/s Feet/s m/s Feet/s m/s

1/2 NPT 3/8 10

BrassCarbon steel304 stainless steel/316 stainless steelMonel

38485048

11.614.615.214.6

19252624

5.87.67.97.3

8111111

2.43.43.43.4

3/4 NPT 3/8 10

BrassCarbon steel304 stainless steel/316 stainless steelMonel

54697268

16.521.021.920.7

27353735

8.210.711.310.7

12151615

3.74.64.94.6

3/4 NPT 9/16 14Carbon steel304 stainless steel/316 stainless steelMonel

9710095

29.630.528.9

495149

14.915.514.9

212221

6.46.76.4

10109

3.03.02.7

1. For gas, air, or steam. Values may be lower for liquids.

2. This is the U dimension in figure 5.

temperature setting knob clockwise to increase tem-perature set point, or counterclockwise to decreasethe set point. [Note: The dial setting and actual pro-cess temperature may vary (offset from set point), es-pecially with wide proportional band settings.] The pro-cess temperature gauge will reflect the desiredtemperature if the controller is calibrated correctly.

Adjustment: Remote Set Point

If the controller is equipped with the remote set pointoption, vary the remote set point pressure to changethe temperature set point. (Note: The remote set pointpressure range must be the same as the controlleroutput signal range.)

Increasing the remote set point pressure increases thecontroller output for direct-acting controllers.Increasing the remote set point pressure decreasesthe controller output for reverse-acting controllers.

Adjustment: Proportional Band

Adjust the proportional band by rotate the proportionalband knob to the desired value.

The proportional band adjustment determines theamount of change in the process temperature requiredto change the controller output signal from one limit ofthe output range to the other limit. It may be adjustedfrom 3 to 100 percent for a 3 to 15 psig (0.2 to 1 bar),or 6 to 100 percent for a 6 to 30 psig (0.4 to 2 bar) ofthe nominal temperature bulb range.

Calibration of Proportional-OnlyControllers

The controller is calibrated at the factory and shouldnot need additional adjustment for most processes.Use the following bench calibration procedures whenthe sensing element has been changed or othermaintenance procedures have altered the calibrationof the controller. If you wish to use the factory


10/34


10

Figure 6. Location of Ajustments, Proportional-Only Controller

46A5667-DB2431/IL

calibration without using the following calibrationprocedure, proceed to the the Startup: ProportionalControllers (General Tuning Guidelines) subsection inthis section.

WARNING

To avoid personal injury or propertydamage caused by the release of pres-sure or process fluid, observe the fol-lowing before starting calibration:

Provide some temporary means ofcontrol for the process before taking thecontroller out of service.

Vent any trapped process pressurefrom both sides of the control valve.

Use lock-out procedures to be surethat the above measures stay in effectwhile you are working on the equip-ment.

Bench Calibration: Proportional-Only Controllerswith Manual Set Point

For controllers with remote set point option, refer tothe Bench Calibration: Proportional-Only Controllerswith Remote Set Point subsection below.

Refer to the description of temperature baths at thestart of the Controller Operation section. Provide atemperature source capable of simulating the processtemperature range of the controller.

Connect a pressure source to the supply pressureregulator, and be sure the regulator is delivering thecorrect supply pressure to the controller. The control-ler must be connected open loop. The following proce-dures use a 3 to 15 psig (0.2 to 1 bar) output pressurerange as an example. For a 6 to 30 psig (0.4 to 2 bar)output range, adjust the values as appropriate.

Key number and part locations are shown in figure 6unless otherwise noted.

1. Rotate the proportional band knob, shown in figure6, to 1.5 (15 percent proportional band).

2. Verify that the calibration adjuster screws (key 43)are at mid-position in the calibration adjuster (key 41)slots.

Depending upon the controller action, perform one orthe other of the following procedures.


11/34


11

For direct-acting controllers:

3. Place the temperature element bulb in the mini-mum bath and adjust the set point indicator (figure 6)to the temperature of the minimum bath.

4. Rotate the temperature setting knob, to thetemperature of the minimum bath temperature. (Note:

The temperature setting knob is located behind theTEMP SETTING dial, and it has a white triangle thatcan be moved around the edge of the dial to thedesired set point temperature.)

5. Adjust the nozzle (key 57) until the controller outputpressure is between 8 and 10 psig (0.6 and 0.7 bar).

Note

If it is not possible to provide a maxi-mum temperature bath with a tempera-ture equal to the upper range limit of thetemperature element bulb, use any tem-

perature that is available within therange. Then, adjust the set point to thetemperature of the bath. The controlleroutput pressure should now be withinthe limits specified in step 6.

6. Place the temperature element bulb in the maxi-mum bath.

7. Rotate the temperature setting knob to the mini-mum set point value.

Note

Do not watch the output gauge whilechanging the calibration adjuster. Achange in controller output pressure isnot an accurate indication of a changein span.

Loosen one screw only on thecalibration adjuster and move thecalibration adjuster a small amountusing the tight screw as a pivot andretighten the screw. If the adjustment isrepeated several times, alternate theloosening of the two screws to preventthe calibration adjuster from beingmisaligned with the beam.

8. Adjust the calibration adjuster shown in figure 7 asfollows: Loosening one of the two adjusting screws(key 43) and move the calibration adjuster (key 41) asmall distance as indicated:

If the output is below the mid-range of 8 to 10psig (0.6 to 0.7 bar), move the adjuster a small dis-tance to the left (as viewed in figure 7) to increase thespan, retighten the screws. For reverse-acting control-lers, see figure 8.

If the output is above the mid-range of 8 to 10psig (0.6 to 0.7 bar), move the adjuster a small dis-tance to the right (as viewed in figure 7) to increasethe span, retighten the screws. For reverse-actingcontrollers, see figure 8. Refer to the above note, thenproceed to steps 9 and 10.

9. Repeat steps 3 through 8 until no further adjust-ment is necessary.

10. Proceed to the Startup: Proportional Only Control-lers procedures in this section.

Bench Calibration: Proportional-Only Controllerswith Remote Set Point


Connect a pressure source to the supply pressure reg-

ulator and be sure the regulator is delivering the cor-rect supply pressure to the controller. The controllermust be connected open loop. The following proce-dures use a 3 to 15 psig (0.2 to 1.0 bar) output pres-sure range as an example. For a 6 to 30 psig (0.4 to2.0 bar) output range, adjust the values as appropri-ate.

1. Connect an adjustable pressure source to the re-mote set point connection on the right side of the con-troller. Provide an adjustable pressure capable of de-livering a pressure equal to the output pressure rangeof the controller (see specifications).

2. Rotate the temperature setting knob to the mini-

mum setting.3. Rotate the proportional band knob, shown in figure6, to 1.5 (15 percent proportional band).

4. Refer to steps 2 through 10 in the procedures forBench Calibration: Proportional-Only Controllers withManual Set Point procedures in this section. For re-mote set point controllers, use the adjustable remoteset point pressure to move the set point as directed inthe steps.

Startup: Proportional-Only Controllers(General Tuning Guidelines)

It may be necessary to calibrate the controller prior tothis procedure.

1. Be sure that the supply pressure regulator isdelivering the proper supply pressure to the controller.

2. For controllers with...

Manual set point:

Rotate the temperature setting knob to the desiredtemperature.


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12

Figure 7. Direct-Acting Controller Span Adjustment Proportional-Only Controllers

A6288/G1/IL

Remote set point:

a. Rotate the temperature setting knob to the mini-mum dial setting.

b. Connect an adjustable pressure source to theremote set point connection (key 109, figure 17).The remote set point mechanism operates on apressure range equal to the controller output signalrange.

c. Adjust the remote set point pressure to thevalue necessary to produce the desired set point.Keep in mind that increasing the remote set pointpressure increases the output of direct-actingcontrollers. Reverse-acting controllers produce theopposite response.

3. Determine the initial proportional band setting(P.B.) in percent from the following equation:

200 x Allowable Overshoot

Temperature Span= P.B.

For example:

200 x 2

30= 13%

(1.3 proportional band setting)

Figure 8. Reverse-Acting Controller Span Adjustment Proportional-Only Controllers

A6289/G1/IL

4. Proportional Action

Disturb the system by tapping the flapper lightly orchange the set point a small amount and check forsystem cycling. If the system does not cycle then low-er the proportional band (raising the gain) and disturbthe system again. Continue this procedure until thesystem cycles. At that point, double the proportionalband setting.

This tuning procedure may be too conservative for

some systems. Tighter control may be desirable onsome systems.

Note

Proportional band adjustment affectsthe set point. Proportional-onlycontrollers will show some offset fromsetpoint depending upon proportionalband setting and process demand. Afteradjusting the proportional band, re-zeroas follows. For controllers with manualset point, carefully rotate the nozzle(key 57) until the steady-state process

temperature equals the temperaturesetting knob reading.

Proportional-Plus-Reset Controllers

This section describes the adjustments and proce-dures for calibration and startup. The locations of ad-

justments are shown in figure 9 unless otherwise spe-cified. All adjustments must be made with the coveropen. When the adjustments and calibration proce-dures are complete, close and latch the cover.


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13

Figure 9. Location of Adjustment Proportional-Plus-Reset Controller

46A6501-CB2277-1/IL

To better understand the adjustments and overalloperation of the controller, refer to the Principle of

Operation section in this manual for proportional-plus-reset controllers. Refer also to the schematicdiagram for proportional-only controllers (figure 13).

Adjustments

Adjustment: Manual Set Point

The temperature setting knob is constructed with awhite triangular indicator that moves along the edge ofthe TEMP SETTING dial. The white triangle is at-tached to the black knob surrounding the dial. Turn thetemperature setting knob clockwise to increase tem-perature set point, or counterclockwise to decreasethe set point. [Note: The dial setting and actual pro-cess temperature may vary (offset from set point), es-pecially with wide proportional band settings.] The pro-cess temperature gauge will reflect the desiredtemperature if the controller is calibrated correctly.


To adjust the proportional band, rotate the knob untilthe desired to the desired value.

The proportional band adjustment determines theamount of change in controlled pressure required to

cause the control valve to stroke fully. It may be ad-justed from 6 to 200 percent for a 3 to 15 psig (0.2 to1 bar), or 12 to 200 percent for a 6 to 30 psig (0.4 to2 bar) of the nominal process temperature rating.

Adjustment: Reset

To adjust reset action turn the knob clockwise to de-crease the minutes per repeat. Turn the knob counter-clockwise to increase the minutes per repeat. Increas-ing the minutes per repeat provides a slower resetaction.

The reset adjustment dial is calibrated in minutes perrepeat. By definition, this is the time in minutes re-quired for the reset action to produce an outputchange which is equal to the change produced by pro-portional control action. This is in effect, the time inminutes required for the controller to increase (or de-crease) its output pressure by an amount equal to aproportional increase (or decrease) caused by achange in set point or process temperature.


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Adjustment: Anti-Reset Windup

This externally mounted valve (see figure 18) can bemounted to relieve on increasing or decreasing outputpressure.

Calibration of Proportional-Plus-ResetControllers

Bench Calibration: Proportional-Plus-ResetControllers

The controller is calibrated at the factory and shouldnot need additional adjustment for most processes.Use the following calibration procedures when thesensing element has been changed or other mainte-nance procedures have altered the calibration of thecontroller. If you wish to use the factory calibrationwithout using the following calibration procedure, pro-

ceed to the the Startup: Proportional Controllers(General Tuning Guidelines) subsection in this section.


Note

If it is not possible to provide a maxi-mum temperature bath with a tempera-

ture equal to the upper range limit of thetemperature element bulb, use any tem-perature that is available from the baththat is within the range. Then, adjust theset point until the controller outputpressure is within the limits noted instep 7. The set point indicator should beat the value equal to the bath tempera-ture.

Connect a supply pressure source to the controller.The controller must be connected open loop. The fol-lowing procedures use a 3 to 15 psig (0.1 to 1.0 bar)output pressure range as an example. For other out-

put pressure ranges [such as 6 to 30 psig (0.2 to 2.0bar)] adjust the values to match the application.

Unless otherwise indicated, key number locations areshown in figure 9.

1. Rotate the reset knob to 0.01 minutes per repeat(fastest setting).

2. Rotate the proportional band knob to 1.5 (15 per-cent proportional band).

3. Verify that the calibration adjuster screws (key 43)are at mid-position in the calibration adjuster (key 41)slots.

4. Immerse the temperature bulb in the minimum tem-perature bath.

5. Rotate the temperature setting knob to the

temperature of the minimum temperature bath.6. Adjust the nozzle (key 57) until the controller outputpressure is between 8 and 10 psig (0.6 and 0.7 bar).

7. Immerse the temperature bulb in the maximumtemperature bath.

8. Rotate the temperature setting knob to thetemperature of the maximum temperature bath

Note

When performing the span adjustmentin step 10, do not watch the controller

output gauge while changing the cal-ibration adjuster. The change in outputis not a good indication of the change inspan. While moving the calibration ad-juster, the output pressure may changein the opposite direction than expected.For example, while moving the calibra-tion adjustor to increase span, the out-put pressure may decrease. This shouldbe disregarded since even though theoutput pressure decreases, the span isincreasing.

Loosen one screw only on thecalibration adjuster and move the

calibration adjuster a small amountusing the tight screw as a pivot andretighten the screw. If the adjustment isrepeated several times, alternate theloosening of the two screws to preventthe calibration adjuster from beingmisaligned with the beam.

9. Adjust the calibration adjuster shown in figure 10 asfollows: Loosening one of the two adjusting screws(key 43) and move the calibration adjuster (key 41) asmall distance as indicated:

If the output is below the mid-range of 8 to 10psig (0.6 to 0.7 bar), move the adjuster a small dis-tance to the left (as shown in figure 10) to increase thespan, retighten the screws. For reverse-acting control-lers, see figure 11.

If the output is above the mid-range of 8 to 10psig (0.6 to 0.7 bar), move the adjuster a small dis-tance to the right (as shown in figure 10) to increasethe span, retighten the screws. For reverse-actingcontrollers, see figure 11. Refer to the above note,then proceed to steps 10 and 11.


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Figure 10. Direct-Acting Controller Span Adjustment


A6288/G1/IL

10. Repeat steps 4 through 9 until no further adjust-ment is necessary.

11. Proceed to the Startup: Proportional-Plus-ResetControllers procedures in this section.

Anti-Reset Windup

Controllers with anti-reset windup have a differentialrelief valve assembly (figure 18). This relief valve isset at the factory to relieve at a 2 psi (0.14 bar) pres-sure difference between the reset bellows pressureand the proportional bellows pressure. The valve can

be adjusted to relieve from 35 inches of water columnto 3 psig (87 to 200 mbar).

Use the relief valve to relieve on either rising controlleroutput pressure or falling controller output pressure. Ifthe arrow on the relief valve points toward the bottomof the controller case as shown in figure 18, the valvewill relieve on falling output pressure. If the arrowpoints in the opposite direction, the valve will relieveon rising output pressure. The valve can be removedand reinstalled with the arrow pointing in the oppositedirection to change the relief action. (Note: Reversingthe arrow requires modification of the relief valve. Re-move the lower casting assembly (with the arrow) from

the relief valve, and rotate the assembly 180 degrees.Then, re-assemble the relief valve. Or, refer to theparts list and order a relief valve for decreasing or in-creasing output pressure.)

Startup: Proportional-Plus-ResetControllers (General Tuning Guidelines)

It may be necessary to the calibrate the controller priorto this procedure.

Figure 11. Reverse-Acting Controller Span Adjustment Proportional-Plus-Reset Controllers

A6289/G1/IL

1. Be sure that the supply pressure regulator is deliv-ering the proper supply pressure to the controller.

2. Rotate the temperature setting knob to the desiredtemperature.

3. Start with a reset setting of 0.05 minutes per repeat(m/r) for fast processes, and 0.5 m/r for slow pro-cesses.

4. Determine the initial proportional band setting (PB)in percent from the following equation.

200 x Allowable Overshoot

Temperature Span= P.B.

For Example:

200 x 2

30= 13%

(1.3 proportional band setting)

5. Proportional Action:

Disturb the system by tapping the flapper lightly orchange the set point a small amount and check forsystem cycling. If the system does not cycle then low-er the proportional band (raising the gain) and disturbthe system again. Continue this procedure until thesystem cycles. At that point, double the proportionalband setting and begin tuning the reset.


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16

6. Reset Action:

Start with a reset setting of 0.5 m/r (minutes per re-peat) for slow temperature process. Then, disturb thesystem. If the system does not cycle then speed upm/r the reset and disturb the system again. Continuethis procedure until the system cycles. When the sys-

tem cycles multiply the reset time setting by a factor of(3) and slow the reset down to the new value. The re-set is now tuned.

This tuning procedure may be too conservative forsome systems. Tighter control may be desirable onsome applications.

Differential Gap Controllers

This section describes the adjustments and proce-dures for calibration and startup. Location of adjust-ments are shown in figure 6 unless otherwise noted.

The output of each controller is checked at the factorybefore the controller is shipped.

To convert a differential gap controller to a proportioncontroller or vice versa, refer to the appropriate proce-dure in the Maintenance section.

Provide appropriate temperature sources, such astemperature baths, to simulate the process tempera-ture range for calibration procedures.

To better understand the adjustments and overalloperation of the controller, refer to the Principle ofOperation section in this manual.

Adjustments

Adjustment: Set Point

The position of the temperature setting knob deter-mines the location of the differential gap within therange of the temperature sensing element. Move thepointer to the desired temperature where the output ofthe controller is to switch from zero to full supply pres-sure with rising process temperature (direct-actingcontrollers) or with falling process temperature (re-verse-acting controllers).


The proportional band adjustment shown in figure 6determines the width of the differential gap. The widthof the gap is the difference between the process pres-sures at which the controller output will switch fromzero to full supply pressure, or from full supply pres-sure to zero. The relationship between the proportionalband knob setting and the differential gap is shown inFigure 12.

Figure 12. Relationship of Differential Gapand Proportional Band

A2202-2/IL

PROPORTIONAL

BAND

KNOB

SETTING

DIFFERENTIAL GAP (PERCENT OF ELEMENT RANGE)

Bench Calibration of Differential GapControllers

The controller is calibrated at the factory and shouldnot need additional adjustment. If you wish to use thefactory calibration without using the following calibra-tion procedure, proceed to the Startup: DifferentialGap Controllers (General Tuning Guidelines) sub- sec-tion in this section. Use the following calibration proce-dures when the sensing element has been changed orother maintenance procedures have altered the cal-ibration of the controller.

Before placing the controller in control of a processloop, check to verify that the controller is calibrated

correctly for the application. The controller must beconnected open loop.


Note

If it is not possible to provide a maxi-mum temperature bath with a tempera-ture equal to the upper range limit of thetemperature element bulb, use any tem-

perature that is available from the baththat is within the range. Then, adjust theset point until the controller outputpressure is within the limits noted instep 6 of the bench calibration proce-dures for proportional-only controllers.The set point indicator should be at thevalue equal to the bath temperature.

Key number locations are shown in figure 14 unlessotherwise noted.


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1. Temporarily convert the differential gap controllerto a proportional-only controller by disconnecting theproportional tubing (key 104) from the mounting base.Reinstall the tubing into the other connection in themounting base as shown in figure 14. Do not invert thereversing block (key 59, figure 19).

2. Upon completion of the calibration procedures, re-install the tubing (key 104) in its original location. And,continue with the following procedures.

3. Refer to figure 12 to determine the proportionalband dial setting required for the desired differentialgap.

For example, assume that a 0 to 100F (18 to 38C)temperature bulb is being used and the direct-actingcontroller is to switch from zero to full supply pressureat a process temperature of 80F (27C) with risingprocess temperature and from full supply pressure tozero at 20F (7C) with falling process temperature.The differential gap is:

80F 20F

100Fx 100 = 60%

27C 7C

38Cx 100 = 60%

According to figure 12, the proportional band dial set-ting should be approximately 4.5; rotate the propor-tional band knob to 4.5.

4. Adjust the proportional band knob for the properdifferential gap (see figure 6).

5. To set the process pressure...

The following steps use a direct-acting controller as anexample. Reverse-acting controllers produce the op-posite response.

a. Rotate the set point adjustment knob to the tem-perature at which the controller output is to switchfrom zero to full supply pressure with rising processtemperature. In the above example, this tempera-ture is 80F.

b. Increase the temperature at the temperaturebulb while monitoring the output pressure gauge.The controller output pressure should switch fromzero to full supply pressure as the upper switchingpoint is reached with rising input temperature.

c. With falling input pressure, the output shouldswitch from full supply pressure back to zero as thelower switching point is reached.

6. Vary the process temperature by switching thetemperature from the maximum temperature bath tothe minimum temperature bath. Observe the switchingpoints. It might be necessary to widen or narrow thedifferential gap by rotating the proportional band knob,then repeat the above steps.

If the output is within the limits stated, refer to thestartup procedures in this section. If the output pres-sure cannot be adjusted within the limits stated, referto the maintenance procedures.

Startup: Differential Gap Controllers(General Tuning Guidelines)

It may be necessary to calibrate the controller prior tothis procedure.

1. Be sure that the supply pressure regulator isdelivering the proper supply pressure to the controller.

2. Adjust the proportional band knob for the properdifferential gap (see figure 6).

3. If the controller is used in conjunction with a controlvalve, slowly open the upstream and downstreammanual shutoff valves, and close the bypass valves.

4. To change the differential gap, perform steps 1through 4 of the bench calibration for differential gapcontrollers procedure.

Principle of OperationThis section describes the principles of operation forthe Types 4156K and 4166K. To better understand theadjustments and overall operation of the controller,refer to figure 13 for a schematic of operation.

Temperature Element Assembly

All the Wizard II temperature controllers accept, as aninput, the process temperature, which is sensed by atemperature bulb immersed in the process fluid. Thetemperature bulb, a capillary tube, a Bourdon tube,and a temperature gauge calibrated for the appropri-ate temperature range form a closed system referredto as the temperature element assembly. The capillarytube connects the temperature bulb to the Bourdontube and the temperature gauge, which are inside thecontroller case. As the sensed temperature varies,pressure inside the Bourdon tube varies proportionally.Because the volume of the temperature bulb is muchlarger than the volume of the capillary tube, tempera-ture errors caused by the ambient temperature of thecapillary tube are negligible.


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18

Figure 13. Schematics of Direct-Acting Proportional-Only and Proportional-Plus-Reset Controllers

46A6501-C28A2970-A

28A2971-A

B2430/IL

Proportional Controllers

As shown in figure 13, supply pressure enters therelay and bleeds through the fixed orifice before es-caping through the nozzle. Nozzle pressure also regis-ters on the large relay diaphragm, and loading pres-sure (controller output pressure) registers on the smallrelay diaphragm.

A change in the temperature increases, pressure in-creases within the Bourdon tube, extending its radiusof arc. Thus, the flapper moves toward the nozzle (in adirect-acting controller). It restricts flow through the

nozzle and nozzle pressure increases. The increasingnozzle pressure acts on the large relay diaphragmwhich opens the inlet end of the relay valve. When thisoccurs, supply pressure increases the output pressureof the controller.

A portion of the output pressure is fed back to the pro-portional bellows, depending on the proportional bandsetting. The action of the proportional bellows counter-acts the flapper movement that resulted from the pro-

cess temperature change and backs the flapper awayfrom the nozzle until equilibrium is attained.

A decreasing process temperature decreases nozzlepressure in a direct-acting controller as the Bourdontube retracts and moves the flapper away from thenozzle. The decreasing nozzle pressure on the largerelay diaphragm causes the relay valve to open theexhaust port. This exhausts the controller outputwhich, in turn, reduces the controller output pressure.

The set point adjustment changes the proximity of thenozzle and flapper as does a change in process tem-perature. When the set point is changed, however, the

nozzle moves with respect to the flapper. The propor-tional band adjustment varies the amount of outputpressure that is fed back to the proportional bellows,changing the gain of the controller.

Controller action is changed from direct to reverse,and vice versa, by moving the reversing block and bel-lows connection as shown in figure 14. With the con-troller in the reverse-acting mode, an increase in pro-cess temperature causes a decrease in outputpressure.


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19


Action of a proportional-plus-reset controller is similarto that of a proportional controller except that feedbackfrom the controller output pressure is piped to a resetbellows as well as to the proportional bellows asshown in figure 13.

Supply pressure is connected to the pressure-balanced relay, with its double diaphragm assembly,and bleeds through the fixed orifice before escapingthrough the nozzle. The nozzle pressure registers onthe large relay diaphragm and the loading pressure(controller output pressure) registers on the small relaydiaphragm.

As the process temperature increases, pressure in-creases within the Bourdon tube, extending its radiusof arc. Thus, the flapper moves toward the nozzle (in adirect-acting controller). It restricts flow through thenozzle and nozzle pressure increases. The increasing

nozzle pressure acts on the large relay input dia-phragm, which moves the diaphragm head assemblydown, opening up the supply valve. This allows supplypressure to flow into the relay output chamber.

A portion of the output pressure is fed back to the pro-portional bellows. The amount of feedback dependson the proportional band setting. The action of the pro-portional bellows counteracts the flapper movementthat resulted from the process temperature changeand backs the flapper away from the nozzle.

Pressure to the reset bellows must first pass throughthe reset valve, causing a time delay. Once the pres-

sure reaches the reset bellows, it opposes the propor-tional bellows and moves the flapper, starting anotherpressure change throughout the system. The changecontinues until the process temperature is returned toset point and the pressures in the two bellows areonce again equal. The reset control is calibrated withopen loop conditions in minutes per repeat, which isthe time in minutes required for reset action to causean output pressure change equal to the initial outputpressure change caused by proportional action.

A decreasing process temperature decreases nozzlepressure in a direct-acting controller as the Bourdontube retracts and moves the flapper away from thenozzle. The decreasing nozzle pressure on the largediaphragm causes the relay valve to open the exhaustport. This exhausts the controller output, which startsto close the supply valve, reducing the controller out-put pressure. The proportional and reset actions thenreact to the change in output pressure in a mannersimilar to that described above.

The set point adjustment changes the proximity of thenozzle and flapper as does a change in process tem-

perature. When the set point is changed, however, thenozzle moves with respect to the flapper. The propor-tional band adjustment varies the amount of outputpressure that is fed back to the proportional bellows,changing the gain of the controller.

Controller action is changed from direct to reverse,

and vice versa, by moving the reversing block and bel-lows connection as shown in figure 14. With the con-troller in the reverse-acting mode, an increase in pro-cess temperature causes a decrease in outputpressure.

Controllers with Anti-Reset Windup

The Type 4166KF controller is a proportional-plus-reset controller with an external anti-reset windupvalve (see figure 18). With this valve set to relieve ondecreasing output pressure, proportional pressure reg-isters rapidly on the spring side of the relief valve dia-

phragm as well as in the proportional bellows. The re-set pressure registers on the opposite side of the reliefvalve diaphragm.

As long as temperature changes are slow enough fornormal proportional and reset action, the relief valvespring prevents opening of the relief valve diaphragm.However, a large or rapid increase in processtemperature causes the relay to exhaust loadingpressure rapidly from the control device, and also fromthe proportional system and spring side of the reliefdiaphragm. If this decrease on the spring side of thediaphragm is greater than the relief valve springsetting, the diaphragm moves off the relief valve orifice

and permits the reset pressure on the opposite side ofthe relief valve diaphragm to bleed rapidly into theproportional system.

The action can be reversed to relieve on increasingoutput pressure. If the arrow on the side of thedifferential relief valve (see figure 18) points to thebottom of the controller, the valve relieves withdecreasing output pressure. If the arrow points to thetop of the controller, the valve relieves with increasingoutput pressure. Anti-reset windup reduces processtemperature overshoot that can result from a large orprolonged deviation from set point.

Differential-Gap Controllers

With a differential-gap controller, feedback pressuredoes not counteract the change in flapper position as itdoes in a proportional controller. Instead, feedbackpressure is piped through the proportional valve to thebellows located on the side of the beam and flapperopposite the nozzle (the lower bellows in figure 10 fordirect acting-controllers). Then, as controller outputpressure increases, feedback pressure moves the


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20

Figure 14. Direct/Reverse Acting Tubing Connections

B1564-3*/IL

PROPORTIONALTUBING (KEY 104)

RELAY TUBING (KEY 103)

REVERSINGBLOCK (KEY 59)

DIRECT

ACTINGPOSITION

BEAM (KEY 44)

BELLOWS(KEY 52)

REVERSEACTINGPOSITION

REVERSINGBLOCK(KEY 59)

PROPORTIONAL TUBING(KEY 104)

REVERSEPOSITION

RESET VALVE

RELAY TUBING(KEY 103)


DIRECTACTINGPOSITION

BEAM (KEY 44)

PROPORTIONALTUBING(KEY 104)

RESET TUBING(KEY 117)

REVERSE ACTINGPOSITION


PROPORTIONALTUBING

RESETTUBING

NOTES:P = PROPORTIONAL BELLOWSR = RESET BELLOWS

X = NO PRESSURE

flapper closer to the nozzle to again increase controlleroutput pressure. This process continues rapidly untilcontroller output pressure is at the upper range limit ofthe range. The action of a differential-gap controller isso rapid that output pressure changes from zero tomaximum as soon as the switching point is reached.The action is similar with falling output pressure.Lower feedback pressure lowers the bellows pressure,which moves the flapper away from the nozzle. Thisagain reduces output pressure and continues untiloutput pressure is zero.

Supply pressure is connected to the pressure-balanced relay, with its double diaphragm assembly,and bleeds through the fixed orifice before escapingthrough the nozzle. The nozzle pressure registers onthe large relay diaphragm and the loading pressure(controller output pressure) registers on the small relaydiaphragm.

As the process temperature increases, pressureincreases within the Bourdon tube, extending its radiusof arc. Thus, the flapper moves toward the nozzle (in adirect-acting controller). It restricts flow through thenozzle and nozzle pressure increases. The increasingnozzle pressure registers on the large relay inputdiaphragm and when the high trip point is reached, thediaphragm head assembly moves down, opening upthe supply valve. This allows supply pressure to flowinto the relay output chamber. The output pressure isfed back to the positive feedback bellows, moving theflapper even closer to the nozzle and rapidlyincreasing the output pressure to the upper range limit.

As the process temperature decreases towards thelow trip point, nozzle pressure decreases because theflapper moves away from the nozzle. At the low trippoint the relay valve opens the exhaust port. Thiscauses a falling output pressure which reduces thebellows pressure, moving the flapper away from the


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RELAYTUBING(KEY 103)REVERSING

BLOCK (KEY 59)


BEAM (KEY 44)REVERSEACTINGPOSITION


PROPORTIONAL TUBING(KEY 104)

REVERSEPOSITION

REMOTE SET POINTTUBING

(KEY 114)

REMOTE SET POINTTUBING TO SIDE

CONNECTIONIN CASE


RELAY TUBING (KEY 103)



BEAM (KEY 44)

REVERSEACTINGPOSITION


REVERSEPOSITION

NOTES:P = POPORTIONAL BELLOWSX = NO PRESSURERS = REMOTE SET

POINT BELLOWS

Figure 14. Direct/Reverse Acting Tubing Connections (Continued)

B1564-3*/IL

nozzle and decreasing the output pressure rapidly tozero. The difference between the process temperaturewhen the controller output switches to zero and theprocess temperature when the controller outputswitches to maximum is the differential gap. The widthof the gap is adjustable with the proportional band ad-

justment; the position of the gap within the tempera-ture element range is adjustable with the set point ad-

justment.

Maintenance

This section describes a variety of regularmaintenance procedures including: filter-regulatormaintenance, replacement of the temperatureelement, replacement of the proportional, reset, ordifferential relief valve, and replacement of the relay. Italso describes how to change the controller action andthe controller output signal range.

Preventative Maintenance Procedures

If the installation includes a 67 Series filter-regulator,periodically open the drain on the filter-regulator todrain accumulated moisture. Establish a maintenancecycle for the filter and regulator to ensure that they areclean and functioning properly. Clean the opening ofthe vent assembly (key 15, figure 17 or 18) regularlyas necessary to keep it from becoming plugged. Therelay orifice (key 88, figure 21) can be cleaned bypressing the cleaner wire (key 89, figure 21).

Parts are subject to normal wear and must be in-spected and replaced as necessary. The frequency ofinspection and parts replacement depends upon theseverity of the service conditions. Due to the careFisher takes in meeting all manufacturing require-ments (heat treating, dimensional tolerances, etc.),use only replacement parts manufactured or furnishedby Fisher.


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Maintenance procedures require that the cover (key 2,figure 17 or 18) be open. When all procedures arecomplete, close the cover. When maintenanceprocedures are complete, calibrate the controller asdescribed in the Calibration sections.

WARNING

To avoid personal injury or propertydamage caused by the release of pres-sure or process fluid, observe the fol-lowing before starting maintenance:

Provide some temporary means ofcontrol for the process before taking thecontroller out of service

Provide a means of containing theprocess fluid before removing the tem-perature bulb from the process

Vent any trapped process pressurefrom both sides of the control valve.

Use lock-out procedures to be surethat the above measures stay in effectwhile you are working on theequipment.

Replacing the Temperature Element

Unless noted otherwise, key numbers refer to figure19.

Removal1. Shut off the supply pressure to the controller, andremove the temperature bulb from the process.

2. Open the cover. Remove the machine screws andwashers (keys 77 and 76, figure 19, and keys 82 and101, figure 17 or 18). Remove the machine screw (key63) that holds the connecting link (key 64) in place;take care not to lose the link bearing (key 65).

3. Lift the Bourdon tube and process temperaturegauge (these are part of the temperature element as-sembly) away from the case, withdrawing the capillary

tube and temperature bulb through the opening in therear of the case.

Installation1. Install the temperature element assembly (key 78,figure 20) by feeding the temperature bulb and capil-lary tube through the opening at the rear of the case.

2. Position the Bourdon tube and process tempera-ture gauge, and install and tighten the machine screws

and washers (keys 77 and 76, figure 19, and keys 82and 101, figure 17 or 18).

3. Install the connecting link (key 64) with the ma-chine screw (key 63). If the beam is not horizontal,loosen the machine screws (key 77) and readjust. Ifthe link connection is not in tension, bend the crosssprings (key 47) slightly.

4. Perform the appropriate calibration procedure.

Changing the Proportional, Reset, orDifferential Relief Valve1. Disconnect the appropriate tubing and remove theproportional band adjustment valve assembly (figure17) or the reset adjustment valve assembly (key 256,figure 18) by unscrewing it from the relay base (key 4,figure 17 or 18). Install the desired replacement as-sembly.

2. Remove the differential relief valve assembly

(figure 18) by removing the tubing, elbow, and tee(keys 130, 124, and 125, figure 18). Install thereplacement relief valve with the arrow pointing thesame direction as the arrow of the removed reliefvalve, unless the relief action is to be reversed(3).

3. Connect the tubing and check all connections forleaks and proceed to the Calibration section.

Changing Action

Proportional-Only to a Differential GapController

It is possible to change a proportional-only controller toa differential gap controller, or vice versa, by changingthe position of the proportional tubing (key 104, figure14).

1. Isolate the controller from process, control, andsupply pressure. Vent any trapped pressure from thecontroller before proceeding with the following steps.

2. Disconnect the proportional tubing (key 104) fromthe mounting base (key 30, figure 19) and reinstall it inthe other connection in the mounting base.

3. Do not invert the reversing block unless it is alsodesired to change the controller action.

4. Perform the appropriate calibration procedure.Check all connections for leaks with a soap-and- watersolution.

Direct to Reverse Action

Use the numbered steps below to change from directaction (increasing pressure produces increasing outputpressure) to reverse action (increasing pressure pro-duces decreasing output pressure), or vice versa.

3. Reversing the arrow requires modification of the relief valve. Remove thelower casing (with the arrow) from the relief valve, and rotate the assembly 180degrees. Then, reassembly the relief valve. (If the relief valve was purchasedfrom the factory no modifications will be necessary.


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Changing the action is accomplished by reversing thepositions of the reversing block and bellows tubing(s)positions.

Key numbers are shown in figure 14 unless otherwisenoted.


2. Locate the new tubing and reversing block posi-tions for the action desired.

3. Locate the two bellows and the reversing block(key 59).

4. Disconnect tubing:

a. For a proportional-only controller withmanual set point, disconnect the proportionaltubing (key 104) from the mounting base (key 30,

figure 19) and reconnect it in the opposite hole.

b. For a proportional-plus-reset controller, dis-connect the proportional tubing (key 104) from themounting base (key 30, figure 19) and disconnectthe reset tubing (key 117) from the mounting base,and reconnect it in the opposite hole.

c. For a proportional-only controller withremote set point, disconnect the proportionaltubing (key 104) from the mounting base (key 30,figure 19), and disconnect the remote set tubing(key 114) from the mounting base, and reconnect itin the opposite hole.

5. Change the reversing block assembly (key 59):

a. Remove the sealing screw (key 56). Inspect theO-ring (key 55) located in the recessed area underthe sealing screw head. Replace the O-ring ifnecessary.

b. Remove the reversing block screw (key 61) andreversing block assembly (key 59). Inspect theO-rings (key 55) located in the recessed area underthe reversing block screw head and between thereversing block assembly and the calibrationadjuster (key 41). Replace these O-rings, if

necessary.

c. Position the reversing block assembly, withO-ring, on the calibration adjuster (key 41) so thatthe nozzle is on the opposite side of the beam (key44) from which it was removed. Properly positionthe reversing block assembly so that the alignmentpin engages the hole in the calibration adjuster.Install the reversing block screw (key 61) withO-ring (key 55).

d. Install the sealing screw (key 56) with O-ring inthe hole previously covered by the reversing blockassembly.

6. Install the relay tubing (key 103) in the reversingblock (key 59).

7. Check all connections for leaks with a soap-and-

water solution. Perform the appropriate bench calibra-tion procedures.

Relay Assembly Maintenance

Replacement: Relay Assembly

Key numbers are shown in figure 21 unless otherwisenoted.


2. Disconnect the tubing (key 103) from the relay.

3. Unscrew the output gauge (key 13).

4. To remove the relay assembly, unscrew twoPhillips-head machine screws (key 81, not shown)located behind the relay on the back of the case.

5. Remove the relay gasket (key 7).

6. The relay can now be disassembled for cleaning orparts replacement, or a new relay can be installed as areplacement. Refer to the following procedure for relaydisassembly. If a new relay is being installed, continuewith the next step.

7. Attach the replacement relay and the new relaygasket with machine screws inserted through the backof the case. Reinstall the output gauge.

8. Check all air-tight connections for leaks with a soapand water solution, and tighten connections if neces-sary, prior to calibration.


Disassembly: Relay Assembly

Key numbers used in the following procedure areshown in figure 21.

1. Remove the relay from the controller case by fol-lowing steps 1 through 5 of the relay replacement pro-

cedure.2. Unscrew the orifice assembly (key 88). Removethe O-ring (key 90) from the orifice assembly.

3. Unscrew and remove the machine screws (key 96)and washers (key 98).

4. Remove the diaphragm casing assembly (key 85)and upper diaphragm (key 91).

5. Remove the spacer ring, diaphragm assembly, andrelay spring (keys 84, 86, and 92).


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NOTE:

THESE DIAMETERS MUST BE CONCENTRIC

WITHIN 0.001 (0.025) INCH(mm)

Figure 15. Relay Alignment Tool(Part Number 15A3519X012)

15A3519-BA5871/IL

6. Unscrew the machine screws (key 97), and removethe spring plate, spring plate gasket, valve plug spring,and valve plug (keys 95, 94, 93, and 87).

7. Use the following steps to assemble the relay.

Assembly: Relay Assembly

Use of the alignment tool (figure 15), although not re-quired, prevents excessive air consumption and deadband.

Key numbers used in this procedure are shown infigure 21.

1. Inspect the diaphragms and gaskets; furnish newparts as needed. The diaphragm assembly (key 86)must be replaced as an assembly. Furnish a newvalve plug (key 87) and springs (keys 92 and 93) ifthese parts are corroded. Inspect the valve seats: oneis located in the diaphragm assembly (key 86), and theother is located in the relay body (key 83). Replace thediaphragm assembly or relay body if necessary.

2. Thoroughly clean all parts, including the orifice as-sembly (key 88).

3. Install the relay spring (key 92) into the relay body.Install the diaphragm assembly, spacer ring, and up-per diaphragm (keys 86, 84, and 91) onto the relay

body. Be certain all flow passages line up with the flowpassage in the relay body.

4. Install the diaphragm casing assembly (key 85)such that the flow passage into the casing aligns withthe flow passage through the diaphragms, spacer ring,and relay body, and so that the lugs on the casing,spacer ring, and relay body are in line.

5. Install the screws (key 96) and washers (key 98),but do not tighten the screws.

6. If a relay alignment tool (figure 15) is to be used,insert the smaller end of the tool into the opening inthe relay body. If the tool does not engage the hole inthe diaphragm, move the relay parts slightly to reposi-tion the diaphragm so that the alignment tool engagesthe hole in the diaphragm assembly. Do not removethe alignment tool until the relay screws have beentightened.

7. Tighten the screws (key 96) evenly. Remove thealignment tool if one was used.

8. Install the valve plug, valve plug spring, spring plategasket, and spring plate (keys 87, 93, 94, and 95).Secure with the machine screws (key 97).

9. Install the O-ring (key 90) on the orifice assembly(key 88). Install the orifice assembly into the dia-phragm casing assembly.

10. Attach the relay and a new relay gasket (key 7,figure 17 or 18) with machine screws inserted throughthe back of the controller case. Reinstall the outputgauge.

11. Check all air-tight connections for leaks with asoap and water solution, and tighten if necessary, priorto calibration.


Changing Output Signal Range

Use the following information and subsequent proce-dures when changing the output signal range of thecontroller. Use the following procedure:

For a controllers, use this procedure to changefrom a 3 to 15 psig (0.2 to 1.0 bar) to a 6 to 30 psig(0.4 to 2.0 bar) output signal range or vice versa.

For a differential gap controller, use this pro-

cedure to change from a 0 and 20 psig (0 and 1.0 bar)to a 0 and 35 psig (0 and 2.4 bar) output signal rangeor vice versa.

When changing the supply pressure source to anew range, refer to table 4 for supply pressure require-ments for the output signal range selected.

Also, make appropriate changes to the nameplate(key 22, figure 17 or 18) of the controller reflecting thenew range selections.


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Key number are shown in figure 19 unless otherwisenoted.

1. Shut off the supply pressure to the controller. Re-move the temperature element assembly (part of thetemperature element assembly, key 78) from the pro-cess and controller.

2. Disconnect the tubing from the mounting base (key30) and calibration adjuster (key 41). Open the cover.Remove the machine screws and washers (keys 82and 101, or keys 77 and 76, figure 17 or 18). Removethe machine screw (key 63) that holds the connectinglink (key 64) in place; take care not to lose the linkbearing (key 65). Lift the Bourdon tube and processtemperature gauge (these are part of the temperatureelement assembly) away from the case, withdrawingthe capillary tube and temperature bulb through theopening in the rear of the case.

3. Unscrew the machine screws (key 28, figure 17 or18), and remove the subassembly from the case.

4. Unscrew the bellows screw (key 54) from each endof the mounting base (key 30). [Note: Previous stylebellows screws (key 54) do not have an O-ring (key55) installed. New style controller assemblies have anO-ring (key 55, figure 16) installed beneath the bellowscrew head (key 54). Remove the O-ring and obtain areplacement when re-assembling the bellows.]

5. Compress the bellows so that the end of the bel-lows and beam can be removed from the end of themounting base (key 30) and unscrewed from the stud(key 51, not shown) that connects the bellows.

6. With the stud that connects the two bellows in

place in the spacer (key 50), screw the new bellowsonto the stud. Install new gaskets (key 53) on eachbellows.

7. Compress the bellows, and install them into themounting base (key 30, figure 16). With the beamparallel with the mounting base, secure the bellowswith the bellows screws (key 54).

Note

Previous style bellows screws (key 54,figure 16) do not have an O-ring (key 55)installed. New style controller assem-blies have an O-ring (key 55, figure 16)installed beneath the bellow screw head(key 54). Install the O-ring on the bel-lows screw before installing the screwinto the mounting base.

8. After tightening the bellows screws, make sure thatthe nozzle (key 57) is centered on the flapper (key 45).

9. Replace the temperature element assembly (seefigure 20) by referring to the Replacing the Tempera-

MOUNTING BASE(KEY 30)

GASKET (KEY 53)

BELLOWS (KEY 52)

BELLOWS SCREW(KEY 54)

0-RING

(KEY 55)

INCH(mm)

NOTE:

0.375 EQUALS 3/8 INCH, AND 0.473 IS APPROXIMATELY

EQUAL TO 15/32 INCH.

1

Figure 16. Bellows Screw Detail

A6281/IL

ture Element subsection within this Maintenance sec-tion.

10. Unscrew the output gauge (key 13, figure 17 or18), and install a new gauge with the correct pressureranges.

11. Check all tubing connections and the bellows ma-chine screws for leaks, tighten as necessary, and pro-ceed to the Calibration section.

Parts OrderingWhenever you correspond with your Fisher salesrepresentative or sales office about this equipment,mention the serial number found on the nameplate(key 22, figure 17 or 18) of the unit. When orderingreplacement parts, state the complete 11-characterpart number of each part required as found in thefollowing parts list.


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Figure 17. Proportional-Only Controller Assembly

46A5670-D/DOC46A5668-D/DOC

Parts KitsDescription Part Number

Controller Repair Kits

Kit contains keys 5, 9, 10, 21, 24, 45, 46,

53, 55, 56, 57, 58, 60, 61, 63, 64 and 65

Standard Temperature R4150X00L12

High Temperature R4150X00H22

Relay Repair Kits

Kit contains keys 7, 85, 86, 87, 88, 90, 91,

92, 93, 94, 99, & 100 (keys 99 & 100 are

included in high temperature relay kitsonly)

Standard Temperature RRELAYX0L12

High Temperature RRELAYX0H12

Relay Replacement Kits

Kit Contains Key 7 & 43 and the Replacement Relay

Standard Temperature RRELAYX0L22

High Temperature RRELAYX0H22

PartsList

SubassembliesDescription Part Number

Controller Subassembly (figure 19)

(includes keys 30-35 and 41-61)

4156K and 4156KS Controllers

Brass Bellows

3 to 15 psig (0.2 to 1.0 bar) 26A7681 X012

6 to 30 psig (0.4 to 2.0 bar) 26A7681 X032

Stainless Steel Bellows

3 to 15 psig (0.2 to 1.0 bar) 26A7681 X022

6 to 30 psig (0.4 to 2.0 bar) 26A7681 X042

Description Part Number

4166K and 4166KF Controllers

Brass Bellows

3 to 15 psig (0.2 to 1.0 bar) 26A7681 X052

6 to 30 psig (0.4 to 2.0 bar) 26A7681 X072

Stainless Steel Bellows

3 to 15 psig (0.2 to 1.0 bar) 26A7681 X062

6 to 30 psig (0.4 to 2.0 bar) 26A7681 X082

Proportional Band Adjustment Assembly (figure 17)

Type 4156K and 4156KS Controllers 10A9122 X032

Type 4166K and 4166KF Controllers 10A9122 X042

Reset Restriction Valve Assembly (figure 18)

Standard construction, or with 19A4361 X012

Anti-Reset Windup Option 19A4365 X012

Relay Assembly (figure 21)(1)

Standard construction 18A5299 X012

Hi-temp construction 18A5300 X042

Syn. oil-resistant construction 18A5299 X022

Stainless steel trim 18A5299 X032

Differential Relief Valve Assembly (figure 18)

(Anti-Reset Windup Valve),

Relives on decreasing output pressure 10A9130 X012

Relives on increasing output pressure 12B2651 X012

Relay Alignment Tool (figure 15) 15A3519 X012

(See relay assembly steps)

Controller and Controller Subassembly(figures 17, 18, and 19)

Key Description Part Number

1 Case, aluminum

Types 4156KS, & 4166K 4H2699 08012

Type 4156K w/remote set 1H3802 08012Type 4166KF 1U5774 08012

1. Refer to the Relay section for included parts.


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Figure 18. Proportional-Plus-Reset Controller Assembly

46A6502-D/DOC

46A6689-F/DOC


2 Cover, aluminum 4H2684 080124 Relay Base, zinc 3H2885 440125* Base Gasket, neoprene 1H2887 03012

7* Relay Gasket, neoprene 1C8974 03012

9* Flexure Pivot Assembly 29A4340 X012

10* Gasket, neoprene 1C3286 03012

13* Output Gauge

0 to 30 psig 16A6983 X012

0 to 60 psig 16A6983 X032

0 to 200 kPa 16A6983 X052

0 to 400 kPa 16A6983 X072


13* Output Gauge (Contd.)

0 to 2 kg/cm2 16A6983 X092

0 to 4 kg/cm2 16A6983 X112

Dual Scale

0 to 30 psig/0 to 200 kPa 16A6983 X372

0 to 60 psig/0 to 400 kPa 16A6983 X392

Triple Scale

0 to 30 psig/0 to 2 kg/cm2/

0 to 2 bar 1Y35087 E012

0 to 60 psig/0 to 4 kg/cm2/

0 to 4 bar 1Y35096 E012

* Recommended spare part.


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Figure19. Controller Subassembly

26A7681-A/DOC


15 Vent Assembly 27A5516 X012

16 Roll Pin, stainless steel (2 reqd) 1H2888 28992

17 Pin, zn pl steel 1H2890 28992

18 Pin, zn pl steel 1H2891 28992

19 Spring Washer, pl steel (2 reqd) 1H2889 28982

20 Cover Latch, pl steel 1H2886 2898221* Cover Gasket, nitrile 1J4075 06432

22 Instruction Plate, aluminum

For psig 15A5683 X012

For kPa 15A5686 X012

For kg/cm2 15A5685 X012

23* Gauge Glass (2 reqd) 0T0192 0604224* Gasket, neoprene (2 reqd) 0T0191 04082

25 Retaining Ring, pl steel (2 reqd) 1A4658 28992

26 Machine Screw, pl steel (8 reqd) 1A5120 28982

27 Retainer (2 reqd) 1C9419 28982

28 Machine Screw, pl steel (4 reqd) 1A3321 28982

29 Machine Screw, pl steel (17 reqd) 1H5269 2898230(2) Mounting Base, aluminum 26A7668 X012

31(2) Flexure Strip, stainless steel 1C8978 3601232(2) Flexure Strip Washer, pl steel (2 reqd) 16A7671 X012

33(2) Machine Screw, pl steel (4 reqd) 1N6886 28992

34(2) Pressure Set Arm, pl steel 36A7669 X012

35(2) Rotary Spring, stainless steel 1J4234 37022

36 Knob, Ryton(3) 36A7670 X01237 Knob Spring, pl steel 1C22152 702238 Dial, aluminum

Fahrenheit temperature ranges

0 to 100 16A7665 X012

50 to 150 16A7665 X022

100 to 200 16A7665 X032

50 to 200 16A7665 X042

0 to 200 16A7665 X052

50 to 250 16A7665 X062

100 to 300 16A7665 X072

200 to 400 16A7665 X082


38 Dial, aluminum (Cont d.)

0 to 300 16A7665 X092

0 to 400 16A7665 X102

0 to 600 16A7665 X112

0 to 800 16A7665 X122

0 to 1000 16A7665 X132

Celsius temperature ranges

0 to 100 16A7665 X142

0 to 150 16A7665 X152

0 to 200 16A7665 X162

0 to 250 16A7665 X172

0 to 300 16A7665 X182

0 to 400 16A7665 X192

0 to 500 16A7665 X202

39 Washer, pl steel 1R9820 2507240 Machine Screw, pl steel 1J8415 28982

41(2) Calibration Adjustor, zinc 2H2662 44012

42(2) Washer, steel (2 reqd) 1E8730 28992

43(2) Machine Screw, pl steel (2 reqd) 1A5733 28982

44(2) Beam, pl steel 1H2668 2507245(2) Flapper, Invar(4) 1H2669 4113246(2) Machine Sc

t controller

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