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Catalog CAT AGZC-2

Air-Cooled Scroll Compressor Chiller AGZ 030CH – AGZ 190CH, Packaged Chiller With Optional Pump Package AGZ 030CB – AGZ 190CB, Chiller with Remote Evaporator 30 to 190 tons 60 Hertz, R-410A

2 Catalog AGZC-2

Model AGZ 030C through AGZ 190C Two-Circuit Chiller (4-Fan Model Illustrated)

Cover Picture: Model AGZ 180C, nominal 180-ton capacity, shown with optional coil louvers installed.

“W” Shaped Coil High Efficiency Service Headroom

Canted Fan Deck Improved Efficiency Reduced

Recirculation

4 or 6 Scroll Compressors Low Sound Levels High Efficiency Two Refrigerant Circuits

Brazed-Plate Evaporator on 30-130 Tons Shell-and-Tube Evaporator on 140-190 tons

Efficient Compact

Control Panel

Power Panels

Document Number: Catalog AGZC-2 Issued: November 2008 Revision Date: February 2009 Replaces: January 2009

©2007 McQuay International. Illustrations and data cover the McQuay International product at the time of publication and we reserve the right to make changes in design and construction at anytime without notice. ™® The following are trademarks or registered trademarks of their respective companies: BACnet from ASHRAE; LONMARK, LonTalk, LONWORKS, and the LONMARK logo are managed, granted and used by LONMARK International under a license granted by Echelon Corporation; Compliant Scroll from Copeland Corporation; ElectroFin from AST ElectroFin Inc.; Modbus from Schneider Electric; FanTrol, MicroTech II, Open Choices, and SpeedTrol from McQuay International, LEED from USGBC.

Catalog AGZC-2 3

Table of Contents 0Introduction ......................................................................................................................................... 44 1Features and Benefits .......................................................................................................................... 45 2Design Features.................................................................................................................................... 47

3Unit.................................................................................................................................................... 47 4Control System ................................................................................................................................ 410

5Optional Pump Packages .................................................................................................................. 414 6Pump Control................................................................................................................................... 416 7Selection Procedure ......................................................................................................................... 417 8Pump Curves ................................................................................................................................... 419 9Pump Package Dimensions ............................................................................................................. 429 1Application ...................................................................................................................................... 539

1Electric Data, With & Without Pumps ............................................................................................ 541 1Unit Amp Draw ............................................................................................................................... 544 1Electrical Data, Single Point............................................................................................................ 553 1Electrical Data, Multi-Point, Circ. #1.............................................................................................. 562

1Selection Procedure ........................................................................................................................... 580 1Application Adjustment Factors ...................................................................................................... 582 1Performance Data.............................................................................................................................. 587

1I-P Units........................................................................................................................................... 587 1SI Units............................................................................................................................................ 590

2Part-load Data.................................................................................................................................... 693 2Sound .................................................................................................................................................. 694 2Pressure Drop Curves ....................................................................................................................... 698 2Physical Data.................................................................................................................................... 6101

2Packaged........................................................................................................................................ 6101 2Remote Evaporator ........................................................................................................................ 6107

2Dimensions ....................................................................................................................................... 6113 2Packaged Units .............................................................................................................................. 6113 2Remote Evaporators ...................................................................................................................... 6123 2Sound Isolation.............................................................................................................................. 6125 3Vibration Isolators, Mounting Locations, and Weights ................................................................. 7125

3Application Data.............................................................................................................................. 7129 3Chilled Water Piping ..................................................................................................................... 7130 3Water Flow Limitations ................................................................................................................. 7130 3Remote Evaporator ........................................................................................................................ 7132 3Operating/Standby Limits.............................................................................................................. 7134

3Warranty Statement ........................................................................................................................ 7135 3Optional Features ............................................................................................................................ 7135 3Product Specification ...................................................................................................................... 7137

*Unit Controllers are LONMARK certified with an optional LONWORKS communication module

Manufactured in an ISO certified facility

*

4 Catalog AGZC-2

Introduction The AGZ-C family of air-cooled scroll chillers offers a wide selection of units from 30 to 190 tons with dual refrigerant circuits and either two or three scroll compressors per circuit. Remote evaporators are available as an option.

The AGZ series of air-cooled scroll chillers continues McQuay’s legacy of high quality, high efficiency, latest technology and quiet operation. These features make the AGZ family the best overall value in air-cooled packaged chillers available today.

Efficient Operation The AGZ units utilize environmentally acceptable R-410A refrigerant and meet the performance requirements of ASHRAE Standard 90.1 for efficiency. With either two or three scroll compressors per refrigerant circuit, excellent part-load performance is achieved.

Latest Control Technology These units have the latest control technology through utilization of McQuay’s MicroTech II® microprocessor. Integrating with your building automation system is easy with the Open Choice™ feature using LonTalk®, BACnet® or Modbus® network communication, requiring only the factory or field mounting of a small communication module to the unit controller. Compact Size Our reputation for compact designs with small footprints to minimize space requirements continues to be a primary feature.

Quiet Operation The AGZ units further enhance McQuay’s reputation for low operating sound levels to make these chillers “neighborhood friendly”.

Nomenclature

A G Z XXX C H

HAZARD IDENTIFICATION INFORMATION

! CAUTION Cautions indicate potentially hazardous situations, which can result in personal injury or

equipment damage if not avoided.

Air-Cooled

Global

Scroll Compressor Design Vintage

Nominal Tons

Application H= Standard B= Remote Evaporator

Catalog AGZC-2 5

Features and Benefits

AGZ-C Chillers Dual Circuits, 30 - 190 Tons The AGZ-C units with dual refrigerant circuits from 30 to 190 tons offer outstanding benefits that make this product effective for a variety of applications.

High Efficiency Full Load Operation = Lower Energy Costs for High Loads Utilizing new R410A scroll compressor technology, the AGZ-C chillers meet or exceed the performance requirements of ASHRAE Standard 90.1. All system components are selected for optimum performance, including the large condenser coil areas and large evaporator sizes. Full load EER ranges from 9.6 to 10.3.

Excellent Part-load Performance = Lower Energy Costs Most of the Year By using either four or six compressors on each chiller, unloading characteristics and part-load performance are outstanding. The IPLV part-load values for the scroll units range from 13.9 to 14.7 EER.

Integrated part-load value (IPLV) is a part-load performance indicator as outlined in ARI Standard 550/590-2003. The IPLV rating compares the performance of different chillers under identical conditions. When the IPLV is listed in EER (Energy Efficiency Ratio), a higher EER will indicate that the chiller’s overall performance is better.

Compact Design & Small Footprint = Installation Flexibility and Lower Cost McQuay AGZ-C series chillers have a reputation for a compact design and small footprint. A small footprint can save installation costs by minimizing the size of the concrete mounting pad or reduces the amount of structural steel if the unit is mounted on the roof.

“Neighborhood friendly” Quiet Operation = Installation Flexibility The AGZ chillers are designed with quiet scroll compressors. Fans are selected for good performance and lower sound levels. The attention to detail with sound is critical in the design. Details such as refrigerant piping, supports for piping, securing components to the structure are all important to making a quiet product. We proudly publish our sound performance, starting on page 796.

MicroTech II® Superior Controls = Efficient, Reliable Operation Once again, McQuay has provided the latest technology in controlling the AGZ-C chillers. The new MicroTech II controller provides a “user-friendly” environment for the operator. The control logic is designed to provide maximum efficiency, to help provide continuing operation in unusual operating conditions through proactive controls, and to provide a history of conditions to aid in problem resolution.

Perhaps the greatest benefit is McQuay’s Open Choice™ feature for integrating with your building automation system (BAS). MicroTech II interfaces with the BAS using open-standard protocols through LonTalk® BACnet® or Modbus®. See the complete control description on page 89 in this catalog.

LEED® Point for Reduced Refrigerant Charge All AGZ-C models comply with EA Credit 4: Enhanced Refrigerant Management

Optional Factory-mounted Pump Package Greatly simplifies the chilled water system design and installation Provides installation savings by reducing field piping, wiring and control costs Saves valuable floor space inside the building.

Compare with Screw Compressor Chillers

6 Catalog AGZC-2

Why Is Compressor Type Important? The important issues for selecting the best chiller are the tangible benefits that have a direct impact on the owner and installer. These benefits include full-load efficiency, part-load performance, quiet operation and cost. Other important issues include compact sizing for reduced installation costs, superior control with the latest technology and the Open Choices™ feature for easy integration with a building automation system.

Superior Part-load Performance Perhaps the biggest benefit of AGZ compared to a typical screw compressor chiller is part-load efficiency. Almost all operating hours are at part-load conditions. Our engineers have designed our AGZ scroll compressor chillers for best performance at reduced load conditions.

Our advantage is simple: the AGZ uses either four or six compressors. When reduced capacity is needed, compressors are cycled off to meet the load. Conversely, screw compressor chillers in this size range typically have only two compressors. A screw compressor relies on slide valves to reduce its capacity to meet a part-load situation. Therefore, it is reasonable to expect the scroll compressor chiller with compressors cycled “off” to be more efficient at part-load than a large screw compressor operating unloaded. (Refer to the IPLV discussion on the ‘Features and Benefits’ page for part-load efficiency comparisons. The AGZ offers superior part-load performance compared to equally-sized screw chillers.

High Efficiency Operation Due to the optimized selection of chiller components and the large condenser coils, the full load efficiency for AGZ-C is comparable to the full load performance of other screw compressor chillers. One must remember that very few operating hours are typically at full load. The ARI Standard 550/590-1998 recognizes full load operation as ONLY 1% of the operating hours.

Quiet Operation – Neighborhood friendly McQuay’s single main rotor screw compressor design has a widely acknowledged reputation for quiet operation. In contrast, dual-rotor screw compressors offered by others are notoriously noisy. The AGZ-C sound levels are low and sound data is proudly displayed in this catalog, beginning on page 896. Except for McQuay’s screw chiller designs, it is difficult to find published sound data from other manufacturers for their air-cooled chillers.

Lower installation costs - Compact design and small footprint The AGZ-C chillers are generally smaller than comparable screw chillers. The AGZ-C’s small footprint allows for smaller mounting pads and structural steel for roof mounting applications that can reduce installation costs.

Superior Control The AGZ-C control system utilizing the MicroTech II controller has the control functions expected of the most sophisticated screw chillers. Integrating a BAS system with AGZ-C chillers is more flexible than most screw chiller packages, with a choice of open standard protocols including LonTalk, BACnet or Modbus. Refer to page 810 for a complete description of the control capabilities and benefits.

Simplicity & Lower Maintenance Costs Lower maintenance cost for the AGZ unit is a result of the simple design. General Service Technicians can typically service the simple scroll compressors. Conversely, screw compressor chillers are complex and require highly trained service technicians for service and repair. Therefore, the owner can have lower maintenance cost with AGZ for the life of the unit.

Summary The decision to use AGZ Scroll Chillers over screw compressor chillers in the 75 - 190 ton range should consider the aforementioned points. The AGZ provides great performance, leading technology, quiet operation, superior control and easy BAS integration. Installers appreciate the smaller footprints. All of these benefits are provided in a simple design with lower maintenance costs.

Catalog AGZC-2 7

Design Features Unit McQuay AGZ Air-Cooled Chillers are a product of the McQuay commitment to offer quiet, reliable, energy efficient equipment--an approach incorporating high quality compressors, state-of-the-art coil design, and innovative packaging. Construction AGZ chillers are factory-assembled and mounted on a heavy-gauge steel base. The base rails, supports and cabinetry are powder-coat painted. The base distributes the unit weight for roof loading. Varied and convenient installation is made possible by virtue of the unit's small footprint. Compressors Copeland’s Compliant Scroll® tandem or triple compressors are used. These rugged hermetic compressors are constructed with an integral cast iron frame, cast iron scrolls, three Teflon® impregnated bearings, and three oil filtration devices for each compressor. Using Copeland's Compliant Scroll tandems and triples provides four to six steps of capacity modulation depending on model size. One to six compressors can run, depending on the load of the system, resulting in excellent part-load efficiency. Each refrigerant circuit has specially designed oil and gas equalization lines to control oil migration. The design also offers radial and axial compliance (no tip seals), a large internal volume for liquid handling, a removable suction screen, and a rotary dirt trap and oil screen. In addition, the compressor is self-compensating for wear, handles moderate liquid slugging, and inherently yields high efficiency. This well protected compressor includes a solid-state motor protection module, 4 individual motor-winding sensors, a patented internal discharge temperature probe, and a patented shutdown feature that prevents reverse rotation. An internal discharge check valve helps prevent shutdown noise and comes standard with high and low pressure taps with Schrader valves, a sight glass, an oil level adjustment valve, and an off cycle crankcase heater. Units are available in 60 Hertz with voltage configurations from 208 to 575 volts (depending on size), operating at 3550 rpm. Condenser Coils Condenser coils have internally enhanced seamless copper tubes arranged in a staggered row pattern. The coils are mechanically expanded into McQuay lanced and rippled aluminum fins with full fin collars. A variety of optional coil material and coatings are available for corrosive atmospheres, including copper fins, black fin and ElectroFin® coating; see page 8135 for description of options. An integral subcooler circuit provides subcooling to greatly reduce the possibility of liquid flashing. The external condenser coils are

fitted with a protective wire mesh guard.

Condenser Fans and Motors Multiple direct drive dynamically balanced propeller fans operate in formed venturi openings at low tip speeds for maximum efficiency and minimum noise and vibration. A heavy-gauge vinyl-coated fan guard protects each fan.

Each condenser fan motor (including the optional VFD fan motor) is Totally Enclosed Air Over (TEAO), heavy-duty, 3-phase with permanently lubricated ball bearings and inherent overload protection.

Figure 1- AGZ 130C with Optional Full Louver Package

8 Catalog AGZC-2

Evaporator Models AGZ-030 through -130 The evaporator is a compact, high efficiency, dual circuit, brazed plate-to-plate type heat exchanger consisting of parallel stainless steel plates.

The evaporator is protected with an electric resistance heater and insulated with 3/4"(19mm) thick closed-cell polyurethane insulation. This combination provides freeze protection down to -20° F (-29° C) ambient air temperature. The suction line is insulated from the evaporator to the split at the compressors.

The water side working pressure is 653 psig (4502 kPa). Evaporators are designed and constructed according to, and listed by, Underwriters Laboratories (UL). Models AGZ-140 through -190

The evaporator is direct-expansion, U-tube type with water flowing in the baffled shell side and refrigerant flowing through the tubes. Two independent refrigerant circuits within the evaporator serve the unit's dual refrigerant circuits.

The evaporator has a carbon steel shell and seamless high-efficiency copper tubes roller expanded into a carbon steel tube sheet.

The refrigerant head is removable to permit access to the tubes. The tube sheet and tube bundle are removable. To drain water, 3/8" (10mm) vent and drain plugs are provided on the top and bottom of the shell.

The evaporator has an immersion heater and is insulated with 3/4" (19mm) thick vinyl nitrate polymer sheet insulation, protecting against water freeze-up at ambient air temperatures to -20° F (-29° C). A thermostat sensing water temperature inside the shell controls the heater. The fitted and glued-in-place insulation has a K factor of 0.28 Btu in/hr ft2 ºF at 75° F.

The refrigerant (tube) side maximum working pressure is 450 psig (3103 kPa). The water side working pressure is 152 psig (1048 kPa). Each evaporator is designed, constructed, inspected, and stamped according to the requirements of the ASME Boiler and Pressure Vessel Code. Double thickness insulation is available as an option.

On Model AGZ-CB units the evaporator is shipped separately for field mounting and piping to the outdoor unit. The refrigeration piping specialties shown in 8Figure 2 are furnished by McQuay and installed by the installing contractor.

! CAUTION A water flow switch, or both water flow switch and water pump starter interlock, must

be field installed and wired to protect against serious equipment damage from evaporator freeze-up under low water flow conditions.

Piping, Valves, and Specialties Table 1, Piping Components Availability

LLSV, SG, TXV, F-D UNIT

Liquid Line

Shut-off

Discharge Shut-off

Suction Shut-off

Hot Gas Bypass & Shut-of Valves Supplied By Installed By

AGZ-C, Packaged Standard Optional Optional Opt. (Factory Mtd). McQuay McQuay AGZ-CB, Remote Evaporator Standard Not Avail. Standard Opt. (Factory Mtd). McQuay Others

NOTE: LLSV=Liquid Line Solenoid Valve, SG=Sight Glass, TXV=Thermo-Expansion Valve, F-D=Filter-Drier

Catalog AGZC-2 9

Figure 2, AGZ-CB, Package Unit Piping Schematic (one circuit shown)

CHARGINGVALVE

LIQUIDTUBING

HGBPVALVE

OILSIGHTGLASS

LIQUIDSHUT-OFFVALVE

SCHRADERVALVE

FILTERDRIER

SOLENOIDVALVE

SIGHTGLASS

THERMALEXPANSION

VALVE

WATERIN

WATEROUT

PLATE TYPEEVAPORATOR

SUCTIONSHUT-OFFBALL VALVE(OPTIONAL)

SUCTIONTUBING

SCHRADERVALVEDISCHARGETUBING

AIRFLOW

AIRFLOW

AIRFLOW

CONDENSERASSEMBLY

SCROLLCOMPRESSOR

(TANDEM OR TRIO)

CHARGINGVALVE

SCHRADERVALVE

(HEADER)

SUCTIONTEMP. SENSOR

(ST1, ST2)

SUCTIONTRANSDUCER(WL1, WL2)

DISCHARGETRANSDUCER(WH1, WH2)

OUTSIDE AIRTEMPERATURE

(WAA)

SCHRADERVALVE

SCHRADERVALVE

HOT GASBYPASSTUBING

(OPTIONAL)

SOLENOIDVALVE

LEAVING WATERTEMP. SENSOR

(ON OPPOSITE SIDE)

ACCESSFITTING

HGBPSHUT-OFF

VALVEDISCHARGESHUT-OFF

VALVE

NOTES: 1. Evaporator is brazed-plate on AGZ 030–130 and shell-and-

tube on AGZ 140-190. 2. Hot gas bypass is an option. The controls are factory installed

and field piping is required. 3. Models 030 to 045 have TXV valves only, Models 140 to 190

have EXV valves only, Models 050 to 130 have TXV as standard with EXV available as an option.

Electrical Control Center Operating and equipment protection controls and motor starting components are separately housed in a centrally located, weather resistant control panel with hinged and tool-locked doors. In addition to the MicroTech II controller described in the next sections, the following components are housed in the panel:

Power terminal block, single point connection standard

Control, input, and output terminal block Control transformer

Optional disconnect switch with through-the-door handle

Compressor motor inherent thermal and overload protection is standard.

Optional phase voltage monitor with under/over voltage and phase reversal protection.

Fan contactors with short circuit protective devices.

Optional ground fault protection. The standard FanTrol® head pressure control

system controls fan staging for control of refrigerant discharge pressure. The FanTrol system cycles condenser fans based on discharge pressure and outdoor temperature and is designed for operation down to 35° F (1.7° C). An optional fan VFD for operation between 35ºF and 0ºF (1.7ºC and -18ºC) is available.

Mechanical high pressure cutout Power connections are per the following table:

Table 2, Power Connections

Power Connection Power Block Disc. Swt.

Comp Circuit

Breakers

Circuit Breakers w/ High Interr.

Capacity

Panel High Short Circuit

Current Rating

AGZ 030-190, Single Point, (Opt ) Std Opt. Std Opt. Opt AGZ 030-190, Multi-Point, (Std.) Std Opt. Not Avail. Opt. Opt.

10 Catalog AGZC-2

Definitions:

1. Power Block: An electrical device to directly accept field wiring without any disconnecting means.

2. Disconnect Switch: A molded case switch that accepts field wiring and disconnects main power to the entire unit or each main power supply if the multi-point power supply option is selected. This option does not provide overcurrent protection.

3. Compressor Circuit Breakers: A manually reset circuit breaker for each compressor, providing compressor only protection and located ahead of the contactor. Provides overcurrent protection for each compressor.

4. Disconnect Switch with High Interrupting Capacity: A molded case switch with high short circuit current rating with one circuit breaker provided with each electrical circuit. The circuit breaker provides overcurrent protection for each power supply.

5. Control Panel High Short Circuit Current Rating: (Previously known as “withstand rating”). The entire control panel is designed for short circuit current rating as shown on page 8136. In the event of a short circuit, the damage is contained within the control panel enclosure.

Control System The MicroTech II advanced DDC chiller controller surpasses all other microprocessor-based chiller control systems available today. This powerful, user-friendly control system provides the flexibility and performance needed for either stand-alone unit operation or the controller can be easily tied into your building automation system of choice using McQuay’s Open Choices feature. Open Choices allows you to choose from open standard protocols such as BACnet®, Modbus® and LonTalk® to communicate easily with the building automation system that best meets your facility requirements. These optional communications modules are available factory installed or can be easily field installed.

MicroTech II control’s state-of-the-art design will not only permit the chiller to run more efficiently, but will also simplify troubleshooting if a system failure occurs. Every MicroTech II controller is programmed and tested prior to shipment to help provide a trouble-free start-up.

Operator-friendly The MicroTech II control menu structure is separated into four distinct categories that provide the operator or service technician with a full description of current unit status, control parameters, and alarms. Security protection helps prevent unauthorized changing of the setpoints and unit control parameters.

MicroTech II control continuously performs important self-diagnostic checks while monitoring system temperatures, pressures and protection devices. It will automatically shutdown a compressor, a refrigerant circuit or the entire unit if a fault occurs. The cause of the shutdown will be retained in memory and can be easily displayed in plain English or metric units for operator review. The MicroTech II chiller controller can also retain and display the time the fault occurred and the operating conditions that were present at the time of the fault, which is an extremely useful feature for troubleshooting. In addition to displaying alarm diagnostics, the MicroTech II chiller controller also provides the operator with a warning of pre-alarm conditions. Alarm notification data can also be passed to your BAS through an optional communications module.

Staging The scroll compressors are staged on and off as a function of leaving chilled water temperature. Lead/lag is automatic and switched based on starts and operating hours.

Equipment Protection The unit is protected in two ways: (1) by alarms that shut the unit down and require manual reset to restore unit operation and (2) by limit alarms that reduce unit operation in response to some out-of-limit condition. Shut down alarms activate an alarm signal that can be exported to a remote location. Limit alarms activate a light on the controller and do not trigger a remote alarm.

Catalog AGZC-2 11

Shutdown Type Alarms No evaporator water flow Low evaporator pressure High condenser pressure Motor protection system Ground fault protection

Sensor failures Phase voltage protection Evaporator freeze protection Outside ambient temperature

Limit Type Alarms Condenser pressure stage down, unloads unit at high discharge pressures Low ambient lockout, shuts off unit at low ambient temperatures Low evaporator pressure hold, holds stage #1 until pressure rises Low evaporator pressure unload, shuts off stage #2

Unit Enable Selection Enables unit operation from either local keypad, digital input, or BAS

Unit Mode Selection Selects standard cooling, ice, glycol, or test operation mode Analog Inputs Reset leaving water temperature, 4-20 mA Demand limit Digital Inputs

Unit off switch Remote start/stop Flow switch Ice mode switch, converts control operation and setpoints for ice production Motor protection

Digital Outputs Shutdown alarm; field wired, activates on an alarm condition, off when alarm is cleared Evaporator pump; field wired, starts pump when unit is set to start Condenser fan control The MicroTech II controller provides control of the condenser fans. The controller steps condenser fans based on discharge pressure.

Building Automation System (BAS) Interface The following BAS protocols are supported:

BACnet/IP BACnet MS/TP BACnet Ethernet

LonTalk (FTT-10A) Modbus

The following functions are generally available depending on the application and protocol in use:

Enable/disable operation Describe each alarm when it occurs Select operating mode Set chilled water setpoint

Set the network limit variable Read operating mode and status Read digital and analog inputs and outputs

12 Catalog AGZC-2

Keypad/Display A 4-line-by-20-character/line liquid crystal display and 6-key keypad is mounted on the unit controller. Its layout is shown below.

Figure 3, AGZ-C Control Panel and Power Panel

Optional Remote Interface Panel In addition to the unit-mounted user interface provided with MicroTech II controls, the AGZ chillers can be individually equipped with a remote user interface. It provides convenient access to unit diagnostics and control adjustments, without having to access a rooftop or outdoor location. A separate remote panel is required for each chiller on a job site.

Each remote user interface is similar to its unit-mounted counterpart and offers the same functionality, including:

Touch-sensitive keypad with a 4 line by 20-character display format. Digital display of messages in English language. All operating conditions, system alarms, control parameters and schedules are monitored.

Menu Button

"Enter" Button

Catalog AGZC-2 13

Features Can be wired up to 1,640 feet (500 meters) from the unit for flexibility in placing each remote user

interface within your building. The main control is isolated from the remote user interface wiring so that wiring problems are less

likely to damage the unit user interface. Benefits Allows you to access the user interface for each unit from one location, inside the building. Users need to learn one format because the remote user interface is identical to the unit-mounted

version. No additional field commissioning is required for the remote user interface. Can be retrofit after unit installation. Is fully compatible with the optional BAS communication modules. Cable and Wiring Recommendations No more than 1,640 feet (500 meters) of wiring can be used to connect the remote user interface to the unit. Power: AWG 22 twisted pair cable. Communications: Belden 9841 or equal AWG 22 twisted pair. See McQuay manual IOM MT II Remote Panel for wiring and installation information.

Figure 4, Remote Interface Panel Dimensions

14 Catalog AGZC-2

Optional Pump Packages

General Description McQuay can provide an optional, on-board, integrated chilled water pump package on Model AGZ-CH chillers. The pump packages provide important benefits: Greatly simplify the chilled water system design and installation Provide installation savings by reducing field piping, wiring and control costs Save valuable floor space inside the building. Bring the return chilled water line to the pump package inlet on the chiller and connect the chilled water supply line to the pump package outlet.

Standard Components (Also see 8Table 4) Single Pump: An end-suction, close-coupled pump, or Model 4380 close-coupled, vertical in-line pump,

depending on unit size. All are vertical split case pumps . The motor and pump rotating assembly can be serviced without removing the pump casing from the line. OR

Dual Pumps, A dual pump consisting of two pumps, mounted in a common casing and including a flapper valve to prevent recirculation when only one pump is operating, and isolation valves that allow one pump to be removed without affecting the operation of the other pump. Depending on chiller size, pumps may be two separate pumps in parallel.

Table 3, Pump Model by Chiller Model AGZ Model Single Pump Model Dual Pump Model

030 to 130 (1) 4270 End Suction

(1) 4280 End Suction



140 to 190 (1) 4380 In-Line (1) 4382 dualArm

NOTE: Pump type on AGZ 030 to 190 depends on pump capacity requirements.

PLUS Combination triple-duty outlet valve having a drip-tight discharge shutoff valve, non-slam check valve,

and flow throttling valve Combination suction guide with flow stabilizing outlet vanes and stainless steel strainer with a disposable

fine-mesh strainer for start-up AGZ 140 to 190 Factory power and control wiring from the AGZ chiller Flow switch, factory mounted and wired Interconnecting piping and valves as shown in 8Figure 5 Factory applied insulation

Options Water pressure gauges on the pump suction and discharge Expansion tank with size increments from 4.4 to 90 gallons, field installed Air separator with air vent, field installed Isolation valve at package inlet Isolation valve at package outlet Flex piping connections, field installed

Catalog AGZC-2 15

Package Components

Table 4, Standard Pump Package Components COMPONENT AGZ 030-070 AGZ 075-130 AGZ 140-190

Strainer Y Strainer w/ B-D Valve Inlet Guide (1) Inlet Guide (1) Suction S-O Valve 1 per Pump (Dual) 1 per Pump (Dual) 1 per Pump Discharge Check 1 per Pump (Dual) 1 per Pump (Dual) 1 per Pump Discharge S-O Valve 1 per Pump 1 per Pump 1 per Pump Flow Switch 1 per Unit 1 per Unit 1 per Unit Triple-Duty Valve 1 per Unit 1 per Unit 1 per Unit Pump(s) 1 or 2 1 or 2 1 or 2 Control Panel Mounted on the pump package base, not shown below for clarity. NOTE: 1. Field Installed 2. All cold surfaces are insulated.

Pump Package Location The pump package mounts on the chiller base, under the condenser on Models 030 through 130. On Models 140 to 190, the package mounts on an extension to the base, outside the condenser. See unit dimension drawings for details.

Figure 5, Standard Components, AGZ 110C to 130C, Dual Pumps Control panel not shown for clarity.

To and From Unit Evaporator

System Inlet Conn.

System Outlet Conn.

Triple Duty Valve

Inlet Guide (Strainer)

Suction Shutoff Valve (2)

Discharge S O Valves

Discharge Check Valves

Flow Switch

Pumps

BACK OF UNIT

16 Catalog AGZC-2

Pump Control The pump control panel is mounted on the unit base and factory wired for power and control. There are three possible pump control arrangements:

1. Single Pump/Single Control; the standard single digital output from the chiller’s microprocessor control starts and stops the pump.

2. Dual Pump/Single Control; the standard single digital output controls the pumps. Pump operation is automatically selected by an alternating relay arrangement. The panel has a selector switch allowing selection of pump A, pump B, or automatic (using relays).

3. Dual Pump/Dual Control; an optional second chiller digital output must be supplied and operation of the pumps is controlled by settings in the microprocessor. The pump output used is determined by the Evap Pump Control setpoint. This setting allows the following configurations:

#1 only – Pump 1 will always be used #2 only – Pump 2 will always be used Auto – The primary pump is the one with the least run hours, the other is used as a backup #1 Primary – Pump 1 is used normally, with pump 2 as a backup #2 Primary – Pump 2 is used normally, with pump 1 as a backup Primary/Standby Pump Staging The pump designated as primary will start first. If the evaporator state is START for a time greater than the RECIRCULATE TIMEOUT SETPOINT and there is no flow, then the primary pump will shut off and the standby pump will start. When the evaporator is in the RUN STATE, if flow is lost for more than half of the FLOW-PROOF SETPOINT value, the primary pump will shut off and the standby pump will start. Once the standby pump is started, the flow loss alarm logic will apply if flow cannot be established in the evaporator START STATE, or if flow is lost in the evaporator RUN STATE. Auto Control If AUTO PUMP CONTROL is selected, the primary/standby logic above is still used. When the evaporator is not in the RUN STATE, the run hours of the pumps will be compared, and the pump with the least hours will be designated as the primary.

Control Panel

Table 5, Panel Components by Pump and Control Arrangement

PUMP/CONTROL CONTROL

TRANS. PUMP

CONTACTORCONTROL RELAYS

ALTERNATING RELAY

SELECTOR SWITCH

MOTOR PROTECTION

AMBIENT THERMOSTAT

Single Pump/Single Control

1 1 1 - - Overload 1

Dual Pump/Single Control

1 2 1 1 1 MSP 1

Dual Pump/Dual Control;

1 2 2 - - MSP 1

Catalog AGZC-2 17

Selection Procedure Selection Data Requirements

The AGZ model size, the chilled water flow, and the total dynamic external system head are required to select a pump package. AGZ Model Size The AGZ model size is determined by the selection program or selected from Catalog AGZ-C. Chilled Water Flow The flow will either be specified or determined from the AGZ selection program. Total External Head The total system dynamic head is the sum of three components: 1. Internal pump package losses from piping, valves and fittings from 8Table 6. 2. Evaporator pressure drop from the selection program or from the 8Figure 36, Evaporator Pressure

Drops on page 999. 3. External system pressure drop as determined by the system designer. For systems using a glycol solution: For internal package pressure drop, use 9Table 6 values. Glycol has no significant impact. For evaporator pressure drop, the McQuay computer selection program includes an automatic

correction factor. If the pressure drop is determined from the Pressure Drop Curve, page 998, use the correction factors from 9Table 7 or 9Table 8 to calculate the water pressure drop for glycol. Do not use uncorrected table values for the evaporator.

The external system pressure drop must also account for glycol use.

Table 6, Pump Package Internal Pressure Drop and Water Volume

AGZ-C MODEL

PRESS. DROP (ft)

WATER VOLUME

(gal.)

AGZ-C MODEL

PRESS. DROP (ft)

WATERVOLUME

(gal.)

AGZ-C MODEL

PRESS. DROP (ft)

WATER VOLUME

(gal.)

AGZ-C MODEL

PRESS. DROP (ft)

WATER VOLUME

(gal.) 030 10 4 055 10 6 080 10 9 130 10 14 035 10 4 060 10 8 090 10 11 140 10 65 040 10 4 065 10 9 100 10 11 160 10 65 045 10 4 070 10 9 110 10 12 180 10 65 050 10 5 075 10 9 125 10 13 190 10 65

NOTES: 1. Internal pump package pressure drop is based on the AGZ nominal flow and includes the pipe, fittings and suction

guide/strainer. It does not include the evaporator pressure drop. Lower flow rates have a negligible affect on the pump selection.

2. Water volume is for the evaporator and pump package piping and fittings.

Table 7, Ethylene Glycol Factors FREEZING

POINT PERCENT GLYCOL °F °C

G (FLOW) P (PRESSURE DROP)

10 26 -3 1.013 1.070 20 18 -8 1.040 1.129 30 7 -14 1.074 1.181 40 -7 -22 1.121 1.263 50 -28 -33 1.178 1.308

18 Catalog AGZC-2

Table 8, Propylene Glycol Factors FREEZING

POINT PERCENT GLYCOL °F °C

G (FLOW) P (PRESSURE DROP)

10 26 -3 1.010 1.068 20 19 -7 1.028 1.147 30 9 -13 1.050 1.248 40 -5 -21 1.078 1.366 50 -27 -33 1.116 1.481

Pump Selection Procedure: A family of pump sizes has been selected for groups of AGZ units. Pages showing the available pumps for each group of AGZ units are shown on the following table:

Table 9, Pump Availability AGZ-C MODEL 030-070 075-100 110-130 140-180 190

Table Location Page 930 Page 932 Page 934 Page 936 Page 937

Using the required flow and total system head, select the best pump from the pump curves beginning on page 119. Pumps curves are approximately in order of flow.

The impeller will be trimmed for specific job conditions after order placement.

Pumps with a discharge size of 8-inch or higher are only 1800 rpm. Pumps less than 8-inch can be 1800 rpm or 3600 rpm.

Pump Nomenclature

2 x 1.5 x 5.5

Selection Example Select a dual pump package for the following condition:

An AGZ 040C with 90 gpm of water flow at a 90 ft external head.

From 1Table 6, the internal pump package pressure drop from 1Table 6 is 10 ft.

From 1Figure 36, Evaporator Pressure Drops on page 199, the evaporator pressure drop is 10 ft.

Internal pump package 10.0 ft Evaporator 10.5 ft External 90.0 ft

Total Head = 110.5 ft

From 1Figure 6 on page 119, Select model 4270, 2 x 1.5 x 5.5, 3600 rpm, 5 HP pump

Suction Size (in.) Discharge Size (in.)

Impeller Size (in.)

Catalog AGZC-2 19

Pump Curves Figure 6, Series 4270, 2x1.5x5.5, 3600 RPM

BHP based onshown Fluid's sp. gr.

4270

4270All Ratings

CURVE NO.

PT32-1-7-3600

2x1.5x5.5

RPM

AVAILABIL

SERIES

SIZE

3600

00.00

301.89

603.79

905.68

1207.57

1509.46

(usgpm)(lps)

(0.0) 0

(9.1) 30

(18.3) 60

(27.4) 90

(36.6) 120

Head (m) ft

FlowWater, sg= 1.00

3600 RPM

NPSHr

5.00 in

4.50 in

4.00 in

71

71

70

70

67

67

62

62

55

55

43

NPSHr

0.5 hp0.75 hp1 hp

1.5 hp2 hp

3 hp

5 hp

5.50 in

3.50 in

71

Figure 7, Series 4280, 3x1.5x6, 3600 RPM


40304280

4030All Ratings

4280All Ratings

CURVE NO.

PT49-2-0-3600

3x1.5x6

RPM

AVAILABIL

SERIES

SIZE

3600

00.00

603.79

1207.57

18011.36

24015.14

(usgpm)(lps)

(0.0) 0

(9.1) 30

(18.3) 60

(27.4) 90

(36.6)

120

(45.7)

150

Head (m) ft

FlowWater, sg= 1.00

3600 RPM

NPSHr

4.88 in

5.25 in

5.63 in 7272

71

71

69

69

65

65

58

58

49

49%

NPSHr

2 hp

3 hp

5 hp

7.5 hp

10 hp

15 hp

6.19 in

4.50 in

71

20 Catalog AGZC-2



40304280

4030All Ratings

4280All Ratings

CURVE NO.

PT48-2-0-1800

3x1.5x6

RPM

AVAILABIL

SERIES

SIZE

1800

00.00

301.89

603.79

905.68

1207.57

(usgpm)(lps)

(0.0) 0

(2.4) 8

(4.9) 16

(7.3) 24

(9.8) 32

(12.2) 40

Head (m) ft

FlowWater, sg= 1.00

1800 RPM

NPSHr

4.88 in

5.25 in

5.63 in

72

72

71

71

67

67

60

60

50

NPSHr

0.25 hp0.333 hp

0.5 hp

0.75 hp

1 hp

1.5 hp

6.19 in

4.50 in

73



40304280

4030All Ratings

4280All Ratings

CURVE NO.

PT50-1-0-1800

3x1.5x8

RPM

AVAILABIL

SERIES

SIZE

1800

00.00

402.52

805.05

1207.57

16010.09

(usgpm)(lps)

(0.0) 0

(4.9) 16

(9.8) 32

(14.6) 48

(19.5) 64

Head (m) ft

FlowWater, sg= 1.00

1800 RPM

NPSHr

6.50 in

7.00 in

7.50 in

69

69

67

67

64

64

58

58

49

49%

36

NPSHr

0.75 hp

1 hp

1.5 hp

2 hp

3 hp

5 hp

8.19 in

6.00 in

69

Catalog AGZC-2 21

Figure 10, Series 4280, 3x2x6, 3600 RPM


40304280

4030All Ratings

4280All Ratings

CURVE NO.

PT63-1-0-3600

3x2x6

RPM

AVAILABIL

SERIES

SIZE

3600

00.00

805.05

16010.09

24015.14

32020.19

(usgpm)(lps)

(0.0) 0

(9.1) 30

(18.3) 60

(27.4) 90

(36.6)

120

Head (m) ft

FlowWater, sg= 1.00

3600 RPM

NPSHr

4.88 in

5.25 in

5.63 in

74

74

71

71

66

66

59

59%

49

49%

NPSHr3 hp

5 hp

7.5 hp

10 hp

15 hp

6.19 in

4.50 in

74



40304280

4030All Ratings

4280All Ratings

CURVE NO.

PT62-1-0-1800

3x2x6

RPM

AVAILABIL

SERIES

SIZE

1800

00.00

402.52

805.05

1207.57

16010.09

(usgpm)(lps)

(0.0) 0

(2.4) 8

(4.9) 16

(7.3) 24

(9.8) 32

Head (m) ft

FlowWater, sg= 1.00

1800 RPM

NPSHr

4.88 in

5.25 in

5.63 in

74

74

72

72

67

67

59

59%

49

49%

37

NPSHr0.333 hp

0.5 hp

0.75 hp

1 hp

1.5 hp

6.19 in

4.50 in

75

22 Catalog AGZC-2



40304280

4030All Ratings

4280All Ratings

CURVE NO.

PT64-1-0-1800

3x2x8

RPM

AVAILABIL

SERIES

SIZE

1800

00.00

603.79

1207.57

18011.36

24015.14

(usgpm)(lps)

(0.0) 0

(3.7) 12

(7.3) 24

(11.0) 36

(14.6) 48

(18.3) 60

Head (m) ft

FlowWater, sg= 1.00

1800 RPM

NPSHr

7.63 in

7.13 in

6.63 in

74

74

72

72

67

67

60

60

5036

NPSHr

1 hp

1.5 hp

2 hp

3 hp

5 hp

8.13 in

5.88 in

74



40304280

4030All Ratings

4280All Ratings

CURVE NO.

PT56-1-0-1800

3x2.5x8

RPM

AVAILABIL

SERIES

SIZE

1800

00.00

805.05

16010.09

24015.14

32020.19

40025.24

(usgpm)(lps)

(0.0) 0

(3.7) 12

(7.3) 24

(11.0) 36

(14.6) 48

(18.3) 60

Head (m) ft

FlowWater, sg= 1.00

1800 RPM

NPSHr

6.13 in

6.75 in

7.38 in

76

76

74

74

70

70

63

63

5353%40

NPSHr 1 hp

1.5 hp

2 hp

3 hp

5 hp

7.5 hp

8.19 in

5.50 in

76

Catalog AGZC-2 23



40304280

4030All Ratings

4280All Ratings

CURVE NO.

PT55-1-0-3600

3x2.5x6

RPM

AVAILABIL

SERIES

SIZE

3600

00.00

1006.31

20012.62

30018.93

40025.24

50031.54

(usgpm)(lps)

(0.0) 0

(9.1) 30

(18.3) 60

(27.4) 90

(36.6)

120

(45.7)

150

Head (m) ft

FlowWater, sg= 1.00

3600 RPM

NPSHr

4.88 in

5.25 in

5.63 in76

76

74

74

69

69

62

62

5239

NPSHr3 hp

5 hp

7.5 hp10 hp

15 hp

6.19 in

4.50 in

76



40304280

4030All Ratings

4280All Ratings

CURVE NO.

PT54-1-0-1800

3x2.5x6

RPM

AVAILABIL

SERIES

SIZE

1800

00.00

603.79

1207.57

18011.36

24015.14

(usgpm)(lps)

(0.0) 0

(2.4) 8

(4.9) 16

(7.3) 24

(9.8) 32

Head (m) ft

FlowWater, sg= 1.00

1800 RPM

NPSHr

4.88 in

5.25 in

5.63 in75

75

72

72

68

68

61

61

51

51%

37

NPSHr0.333 hp

0.5 hp

0.75 hp1 hp

1.5 hp

2 hp

6.19 in

4.50 in

75

24 Catalog AGZC-2



43024382

4302All Ratings

4382All Ratings

CURVE NO.

PT30-1-0-1800

3x3x8

RPM

AVAILABIL

SERIES

SIZE

1800

00.00

402.52

805.05

1207.57

16010.09

20012.62

(usgpm)(lps)

(0.0) 0

(4.9) 16

(9.8) 32

(14.6) 48

(19.5) 64

Head (m) ft

FlowWater, sg= 1.00

1800 RPM

NPSHr

6.50 in

7.00 in

7.50 in

69

69

67

67

63

63

57

57

48

48%

36

NPSHr

0.75 hp1 hp

1.5 hp

2 hp

3 hp

5 hp

8.19 in

6.00 in

69



40304280

4030All Ratings

4280All Ratings

CURVE NO.

PT78-1-0-3600

4x3x6

RPM

AVAILABIL

SERIES

SIZE

3600

00.00

16010.09

32020.19

48030.28

64040.38

80050.47

(usgpm)(lps)

(0.0) 0

(9.1) 30

(18.3) 60

(27.4) 90

(36.6)

120

(45.7)

150

Head (m) ft

FlowWater, sg= 1.00

3600 RPM

NPSHr

4.88 in

5.25 in

5.63 in 82

82

77

77

71

71

614935

NPSHr

5 hp

7.5 hp10 hp

15 hp

20 hp

25 hp30 hp

6.19 in

4.50 in

83

Catalog AGZC-2 25



40304280

4030All Ratings

4280All Ratings

CURVE NO.

PT78-1-0-1800

4x3x6

RPM

SERIES

SIZE

1800

00.00

805.05

16010.09

24015.14

32020.19

40025.24

(usgpm)(lps)

(0.0) 0

(2.4) 8

(4.9) 16

(7.3) 24

(9.8) 32

Head (m) ft

FlowWater, sg= 1.00

1800 RPM

NPSHr

4.88 in

5.25 in

5.63 in82

82

77

77

71

71

614935

NPSHr

0.75 hp1 hp

1.5 hp

2 hp

3 hp

5 hp

6.19 in

4.50 in

83



43024382

4302All Ratings

4382All Ratings

CURVE NO.

PT66-2-0-1800

4x4x10

RPM

AVAILABIL

SERIES

SIZE

1800

00.00

805.05

16010.09

24015.14

32020.19

40025.24

(usgpm)(lps)

(0.0) 0

(6.1) 20

(12.2) 40

(18.3) 60

(24.4) 80

(30.5)

100

Head (m) ft

FlowWater, sg= 1.00

1800 RPM

NPSHr

8.13 in

8.75 in

9.38 in

75

75

73

73

70

70

64

64

5441

NPSHr

2 hp

3 hp

5 hp

7.5 hp

10 hp

15 hp

10.16 in

7.50 in

75

26 Catalog AGZC-2



43024382

4302All Ratings

4382All Ratings

CURVE NO.

PT86-1-0-3600

6x6x6

RPM

AVAILABIL

SERIES

SIZE

3600

00.00

20012.62

40025.24

60037.85

80050.47

100063.09

(usgpm)(lps)

(0.0) 0

(9.1) 30

(18.3) 60

(27.4) 90

(36.6)

120

(45.7)

150

Head (m) ft

FlowWater, sg= 1.00

3600 RPM

NPSHr

4.88 in

5.25 in

5.63 in 82

82

79

79

74

74

66

66%

5542

NPSHr 5 hp7.5 hp

10 hp

15 hp

20 hp

25 hp

6.19 in

4.50 in

83



43024382

4302All Ratings

4382All Ratings

CURVE NO.

PT85-1-0-1800

6x6x6

RPM

AVAILABIL

SERIES

SIZE

1800

00.00

1006.31

20012.62

30018.93

40025.24

50031.54

(usgpm)(lps)

(0.0) 0

(2.4) 8

(4.9) 16

(7.3) 24

(9.8) 32

Head (m) ft

FlowWater, sg= 1.00

1800 RPM

NPSHr

4.88 in

5.25 in

5.63 in 83

83

80

80

76

76

68

68

5844

NPSHr

0.5 hp0.75 hp

1 hp

1.5 hp

2 hp

3 hp

6.19 in

4.50 in

83

Catalog AGZC-2 27



43024382

4302All Ratings

4382All Ratings

CURVE NO.

PT87-1-0-1800

6x6x8

RPM

AVAILABIL

SERIES

SIZE

1800

00.00

16010.09

32020.19

48030.28

64040.38

80050.47

(usgpm)(lps)

(0.0) 0

(3.7) 12

(7.3) 24

(11.0) 36

(14.6) 48

(18.3) 60

Head (m) ft

FlowWater, sg= 1.00

1800 RPM

NPSHr

6.50 in

7.00 in

7.50 in

77

77

73

73

67

67

59

59%

4835

NPSHr3 hp

5 hp

7.5 hp

10 hp

15 hp

8.19 in

6.00 in

78

Figure 23, Series 4382, 6x6x10, 1800RPM


43024382

4302All Ratings

4382All Ratings

CURVE NO.

PT81-1-0-1800

6x6x10

RPM

AVAILABIL

SERIES

SIZE

1800

00.00

1006.31

20012.62

30018.93

40025.24

50031.54

(usgpm)(lps)

(0.0) 0

(6.1) 20

(12.2) 40

(18.3) 60

(24.4) 80

(30.5)

100

Head (m) ft

FlowWater, sg= 1.00

1800 RPM

NPSHr

8.50 in

9.00 in

9.50 in 71

71

69

69

64

64

57

57

4836

NPSHr

3 hp

5 hp

7.5 hp10 hp

15 hp

10.19 in

8.00 in

72

28 Catalog AGZC-2

Figure 24, Series 4382, 8x8x10, 1800RPM


43024382

4302All Ratings

4382All Ratings

CURVE NO.

PT104-1-0-1800

8x8x10

RPM

AVAILABIL

SERIES

SIZE

1800

00.00

20012.62

40025.24

60037.85

80050.47

100063.09

(usgpm)(lps)

(0.0) 0

(6.1) 20

(12.2) 40

(18.3) 60

(24.4) 80

(30.5)

100

Head (m) ft

FlowWater, sg= 1.00

1800 RPM

NPSHr

8.50 in

9.00 in

9.50 in 83

83

81

81

76

76

68

68

56

56

NPSHr

5 hp

7.5 hp10 hp

15 hp

20 hp25 hp

10.19 in

8.00 in

84

Catalog AGZC-2 29

Pump Package Dimensions Figure 25, AGZ 030C to 070C Dimensions with Pump Package

NOTES: 1. The dimension drawing depicts the dual-pump option; a single pump is also available. Water connections are in

the same location with either arrangement. 2. See following page for additional dimensions and pump information. 3. Due to variations in pump sizes, operating weight with water is approximate, and may increase up to 5%. The

mounting weights are shown on page 138. AGZ-C, 4-FAN UNIT, WEIGHTS AND CG (with PUMPS)

CG LOCATION (in.) CORNER LIFTING WEIGHTS (lbs)AGZ-C MODEL X Y Z

SHIPPING WEIGHT (lbs)

OPERATING WEIGHT (lbs) L1 L2 L3 L4

030C 43.4 37.8 45.0 4020 4035 1101 1072 936 911035C 43.7 37.7 44.9 4070 4090 1112 1095 939 925 040C 43.8 37.9 45.0 4185 4205 1134 1122 970 959 045C 45.1 40.0 45.1 4310 4335 1133 1189 971 1018 050C 44.2 38.7 45.1 4435 4465 1187 1198 1020 1030 055C 44.7 38.8 44.3 4375 4405 1191 1229 962 993 060C 46.1 38.2 44.3 4640 4690 1222 1343 989 1087 065C 46.2 38.2 44.6 4670 4725 1213 1342 1004 1111 070C 42.6 36.6 47.3 5225 5280 1341 1255 1358 1271

SINGLE PUMP

SCALE

ALL DIMENSIONS ARE IN DECIMAL INCHES

NONE *331779021001*

100.2

X

43.7

6.4

88.0

14.4

94.9

8.0REF.CONTROL BOX WIDTH

2.52.5

18.0

43.7

FIELD CONTROLCONNECTION

CG

CONTROLPANEL

EVAP

POWER ENTRY POINT.875 KNOCK OUTS

FRONT OR SIDE

NOTE: 1. DUE TO VARIATIONS IN PUMP SIZES, OPERATING WEIGHT WITH WATER IS

APPROXIMATE AND MAY INCREASE UP TO 5%

PUMPCOMTROL

PANEL

Z

Y

5.0

2.0

3.4

4.0

19.919.9

94.3

40.7

DB

CA

EVAP WATER INLET

EVAP WATEROUTLET

CG

L3L4

L1L2

POWERCONNECTIONSOPPOSITE SIDEOF CONTROL BOX

2.0

2.0

13.367.813.3

ISOLATOR MOUNTING HOLE LOCATIONS ON BOTTOM SURFACE OF UNIT BASE

COMPRESSORCIRCUIT #2


L1

L2

L3

L4

M1M3

M2M4 EVAP PIPINGCONNECTIONS

30 Catalog AGZC-2

Table 10, Single and Dual Pumps, AGZ 030C to 070C DIMENSIONS (in.) AGZ-C

MODEL PUMP

OPTION # PUMP

MODEL FIELD CONN.

INLET SIZE (in.) FIELD CONN.

OUTLET SIZE (in.) A B C D

1A 4270 2x1.5x5, 2HP 2A 4270 2x1.5x5, 3HP

Ø2.5 26.2 69.8 030

2B 4280 3x1.5x8, 3HP Ø3.0 Ø2.5

26.0 70.8 19.5 69.9

1A 4270 2x1.5x5, 2HP 2A 4270 2x1.5x5, 3HP 3A 4270 2x1.5x5, 5HP

Ø2.5 26.2 69.8

3B 4280 3x2x8, 5HP 035

3C 4280 3x1.5x6, 5HP Ø3.0

Ø2.5

26.0 70.8

19.5 69.9

1A 4270 2x1.5x5, 2HP 2A 4270 2x1.5x5, 3HP 3A 4270 2x1.5x5, 5HP

Ø2.5 26.2 69.8

3B 4280 3x2x8, 5HP 040

3C 4280 3x1.5x6, 5HP Ø3.0

Ø2.5

26.0 70.8

19.5 69.9

1A 4270 2x1.5x5, 2HP 2A 4270 2x1.5x5, 3HP

Ø2.5 26.2 69.8

2B 4280 3x1.5x8, 3HP Ø3.0 26.0 70.8 3A 4270 2x1.5x5, 5HP Ø2.5 26.2 69.8 3B 4280 3x2x8, 5HP 3C 4280 3x1.5x8, 5HP

045

3D 4280 3x1.5x6, 5HP Ø3.0

Ø2.5

26.0 70.8

19.5 69.9

1A 4270 2x1.5x5, 2HP 2A 4270 2x1.5x5, 3HP

Ø2.5 26.2 69.8

2B 4280 3x1.5x8, 3HP Ø3.0 26.0 70.8 3A 4270 2x1.5x5, 5HP Ø2.5 26.2 69.8 3B 4280 3x2.5x8, 5HP 3C 4280 3x1.5x8, 5HP

050

3D 4280 3x1.5x6, 5HP Ø3.0

Ø2.5

26.0 70.8

19.5 69.9

1A 4270 2x1.5x5, 2HP 2A 4270 2x1.5x5, 3HP

Ø2.5 26.2 69.8

2B 4280 3x1.5x8, 3HP Ø3.0 26.0 70.8 3A 4270 2x1.5x5, 5HP Ø2.5 26.2 69.8 3B 4280 3x1.5x6, 5HP 3C 4280 3x1.5x8, 5HP

055

3D 4280 3x2x6, 5HP Ø3.0

Ø2.5

26.0 70.8

19.5 69.9

1A 4270 2x1.5x5, 3HP 2A 4270 2x1.5x5, 5HP

28.2 70.2

2B 4280 3.1.5x6, 5HP 3A 4280 3x1.5x6, 7.5HP 3B 4280 3x2x6, 7.5HP

28.0 060

4A 4280 3x2x6, 10HP

Ø3.0 Ø3.0

29.3

70.7 21.2 70.8

1A 4270 2x1.5x5, 3HP 2A 4270 2x1.5x5, 5HP

28.2 70.2

2B 4280 3x1.5x6, 5HP 3A 4280 3x1.5x6 7.5HP 3B 4280 3x2x6, 7.5HP

28.0 065

4A 4280 3x2x6, 10HP

Ø3.0 Ø3.0

29.3

70.7 21.2 70.8

1A 4270 2x1.5x5, 3HP 2A 4270 2x1.5x5, 5HP

28.2 70.2

2B 4280 3x1.5x6, 5HP 3A 4280 3x1.5x6, 7.5HP 3B 4280 3x2.5x6, 7.5P

28.0 070

4A 4280 3x2.5x6, 10HP

Ø3.0 Ø3.0

29.3

70.7 21.2 70.8

Catalog AGZC-2 31

Figure 26, AGZ 075C to 100C Dimensions with Pump Package

NOTES: 1. The dimension drawing depicts the optional dual-pump arrangement, a single pump is standard. 2. See following page for additional dimensions and pump information. 3. Due to variations in pump sizes, operating weight with water is approximate, and may increase up to 5%. The

mounting weights are shown on page 138.

AGZ-C, 6-FAN UNIT, WEIGHTS AND CG (with PUMPS)

CG LOCATION (in.) LIFTING WEIGHT BY CORNER (lbs) AGZ-C MODEL X Y Z

SHIPPING WEIGHT (lbs)

OPERATING WEIGHT (lbs) L1 L2 L3 L4

075C 47.2 38.1 61.0 6640 6690 1769 2044 1312 1516

080C 47.3 39.7 59.3 6720 6775 1847 2143 1264 1466

090C 47.2 40.0 59.8 6595 6660 1800 2075 1262 1457

100C 47.4 39.6 60.7 6730 6795 1797 2093 1311 1529

100.2

X

43.7

6.4 14.4

88.0

95.0

CONTROL BOX WIDTH 8.0REF.

2.5

2.5

18.0

43.7

FIELD CONTROLCONNECTION

CG

POWER ENTRY POINT.875 KNOCK OUTS

FRONT AND SIDE

CONTROLBOX

PUMPCONTROL

PANEL

Z

Y

24.0 24.0

134.9

2.03.4

5.0

4.0

40.7EVAP

L3L4

L1L2

CG


12.4 12.4110.1

2.0

2.0




L1

L2

L3

L4

M1M3

M2M4

EVAPEVAP

WATERCONNECTION

49.5

C

B

AEVAP. WATER

INLET

EVAP. WATEROUTLET

BACK VIEW

FRONT VIEWSIDE VIEW

TOP VIEW

32 Catalog AGZC-2

Table 11, AGZ075C to-100C, Single and Dual Pumps

AGZ-C MODEL

PUMP OPTION #

PUMP MODEL

FIELD CONN.INLET SIZE

(i )

FIELD CONN. OUTLET SIZE

(i )

A B C

1A 4280 3x1.5x6, 5HP1B 4280 3x2x6, 5HP 2A 4270 3x2x6, 7.5HP 2B 4280 3x2.5x6, 7.5HP 2C NA

24.5

3A 4280 3x2x6, 10HP 3B 44280 3x2.5x6, 10HP

075

4A 4280 3x2.5x6, 15HP

Ø3.0 Ø3.0 49.5

25.2

10.2

1A 4280 3x1.5x6, 5HP1B 4280 3x2x6, 5HP 2A 4280 3x1.5x6, 7.5HP 2B 4280 3x2x6, 7.5HP 2C 4280 3x2.5x6, 7.5HP

24.5

3A 4280 3x2x6, 10HP 3B 4280 3x2.5x6, 10HP

080

4A 4280 3x2.6x6, 15HP

Ø3.0 Ø3.0 49.5

25.2

10.2

1A 4280 3x1.5x6, 5HP2A 4280 3x1.5x6, 7.5HP 2B 4280 3x2x6, 7.5HP

24.5

3A 4280 3x2x6, 10HP 3B 4280 3x2.5x6, 10HP

090

4A 4280 3x2.5x6, 15HP

Ø3.0 Ø3.0 49.5

25.2

10.2

1A 4280 3x2x6, 5HP2A 4280 3x2x6, 7.5HP 2B 4280 3x2.5x6, 7.5HP

24.5

3A 4280 3x2x6, 10HP 3B 4280 3x2.5x6, 10HP

49.5

25.2

3C 4280 4x3x6, 10HP 52.0 26.2 4A 4280 3x2.5x6, 15HP 49.5 25.2

100

4B 4280 4x3x6, 15HP

Ø3.0 Ø3.0

52.0 26.2

10.2

Catalog AGZC-2 33


NOTES:

1. The dimension drawing depicts the optional dual-pump arrangement, a single pump is standard. 2. See following page for additional dimensions and pump information. 3. Due to variations in pump sizes, operating weight with water is approximate, and may increase up to 5%. The



CG LOCATION (in.) LIFTING WEIGHT BY

CORNER (lbs) AGZ-C MODEL

X Y Z

SHIPPING WEIGHT

(lbs)

OPERATING WEIGHT

(lbs) L1 L2 L3 L4

110C 46.2 38.6 79.0 8580 8650 2284 2522 1794 1981

125C 45.8 39.7 79.2 8720 8800 2337 2534 1847 2002

130C 46.1 40.7 78.3 8850 8945 2386 2624 1829 2012

L1L3

NOTES: 1. DUE TO VARIATIONS IN PUMP SIZES, OPERATING WEIGHT WITH WATER IS APPROXIMATE AND MAY INCREASE UP TO 5%.

ALL DIMENSIONS ARE IN DECIMAL INCHESSCALE

NONE *331779023001*

100.2

X

43.7

6.4 14.4

88.0

95.0

CONTROL BOX WIDTH

8.0REF.

2.5

2.518.1

43.7

FIELD CONTROLCONNECTIONS

L1

L2

CONTROLBOX

EVAP

POWER ENTRY POINTS.875 KNOCK OUTS

FRONT OR SIDE

PUMPCONTROL

PANELY

Z24.0 24.0

173.1

40.7

4.0

5.0

2.03.4

CGCG

L1L2

L3L4


25.2 67.8 67.7 12.4

2.0

2.0




L4

M1M3M5

M6 M4 M2EVAP

WATERCONNECTIONS

50.0

A

B

C

EVAP. WATERINLET

EVAP. WATEROUTLET BACK VIEW

FRONT VIEWSIDE VIEW

TOP VIEW

34 Catalog AGZC-2

Table 12, AGZ 110C to-130C, Single and Dual Pumps

DIMENSIONS (in.) AGZ-C MODEL

PUMP OPTION NUMBER

PUMP SIZE FIELD CONN. INLET SIZE

(in.)

FIELD CONN. OUTLET SIZE

(in.) A B C

1A 4280 3x2x6, 5HP 2A 4280 3x2x6, 7.5HP 2B 4280 3x2.5x6, 7.5HP

24.5

3A 4280 3x2x6, 10HP 3B 4280 3x2.5x6, 10HP

50.0

25.2

3C 4280 4x3x6, 10HP 52.5 26.2 4A 4280 3x2.5x6, 15HP 50.0 25.2

110

4B 4280 4x3x6, 15HP

Ø3.0 Ø3.0

52.5 26.2

10.2

1A 4280 3x2x6, 5HP 2A 4280 3x2x6, 7.5HP 2B 4289 3x2.5x6, 7.5HP

24.5

3A 4280 3x2x6, 10HP 3B 4280 3x2.5.6, 10HP 4A 4280 3x2.5x6, 15HP

50.0

26.2 125

4B 4280 4x3x6, 15HP

52.5 26.2

1A 42480 3x2x6, 5HP2A 4280 3x2x6, 7.5HP 2B 4280 3x2.5x6, 7.5HP

24.5

3A 4280 3x2x6, 10HP 3B 4280 3x2.5x6, 10HP

50.0

3C 4280 4x3x6, 10HP 4A 4280 3x2.5x6, 15HP 50.0

25.2 130

4B 4280 4x3x6, 15HP

52.5 26.2

Catalog AGZC-2 35


L5L6

M7

M8

NOTE: 1. DUE TO VARIATIONS IN PUMP SIZES, OPERATING WEIGHT WITH WATER IS APPROXIMATE AND MAY INCREASE UP TO 5%.

L5

L6

SCALEALL DIMENSIONS ARE IN DECIMAL INCHES

NONE *331779024001*

100.2

6.5 6.6

44.0

X

2.52.511.8

44.0

88.0

95.0


CONTROLPANEL

EVAP

CG


FRONT OR SIDE

PUMPCONTROL

PANEL

Y

Z

2.00

3.40

5.004.80

104.2

24.0

268.0

41.62

17.00

15.50EVAP

WATEROUTLET

8"VICTAULIC

CONNECTION

CG

M5

L3L4

L1L2

POWER CONNECTIONSOPPOSITE SIDE OFCONTROL BOX

81.1 67.7 12.4

2.0

2.0

31.97

85.89

34.17 72.80




L1

L2

L3

L4

M1M3

M6 M4 M2

43.04A

EVAPWATERINLET

BACK VIEW

FRONT VIEWSIDE VIEW

TOP VIEW

NOTES: 1. The dimension drawing depicts the optional dual-pump arrangement, a single pump is standard. 2. See following page for additional dimensions and pump information. 3. Due to variations in pump sizes, operating weight with water is approximate, and may increase up to 5%. The



CG LOCATION (in.) LIFTING WEIGHT BY CORNER (lbs) AGZ-C MODEL X Y Z

SHIPPING WEIGHT

(lbs)

OPERATING WEIGHT

(lbs) L1 L2 L3 L4 L5 L6

140C 44.7 39.6 121.7 12580 13062 2784 2872 1964 2026 1444.4 1489.8

160C 44.1 37.4 123.3 12610 13092 2776 2794 2000 2013 1508.2 1517.8

180C 44.4 35.2 122.7 12731 13213 2805 2859 2004 2043 1495.9 1524.7

36 Catalog AGZC-2

Table 13, AGZ 140C to 180C, Single Pump

AGZ-C MODEL PUMP OPTION

NUMBER PUMP SIZE

FIELD CONN. INLET SIZE (in.)

FIELD CONN.

OUTLET SIZE

A

1A 4382 4x4x10, 7.5HP2A 4382 4x4x10, 10HP

Ø6.0 16.5

2B 4382 6x6x10, 10HP Ø8.0 17.2 3A 4382 3x3x8, 15HP Ø4.0 16.5 3B 4380 4x4x10, 15HP Ø6.0 16.5 3C 4380 6x6x10, 15HP

3D 4382 6x6x6, 15HP 3E 4382 8x8x10, 15HP

140

4A 4382 8x8x10, 20HP

Ø8.0

Ø8.0

17.2

1A None2A 4382 6x6x10, 10HP 2B 4382 6x6x8, 10HP 3A 4382 6x6x10, 15HP 3B 4382 6x6x6, 15HP

160

4A 4382 6x6x6, 20HP

Ø8.0 Ø8.0 17.2

1A None2A 4382 6x6x10, 10HP 3A 4382 6x6x10, 15HP 3B 4382 6x6x6, 15HP

180

4A 4382 6x6x6, 20HP

Ø8.0 Ø8.0 17.2

NOTE Chilled water outlet connection is made to the unit’s evaporator outlet nozzle. Table 14, AGZ 14C0 to 180C, Dual Pumps

AGZ-C MODEL

PUMP OPTION NUMBER

Pump Size FIELD CONN. INLET SIZE

(in.)

FIELD CONN.

OUTLET SIZE

(NOTE 1)

A

1A 4382 4x4x10, 7.5HP2A 4382 4x4x10, 10HP

Ø6.0 16.5

2B 4382 6x6x10, 10HP Ø8.0 17.2 3A 4382 3x3x8, 15HP Ø4.0 16.5 3B 4380 4x4x10, 15HP Ø6.0 16.5 3C 4380 6x6x10, 15HP

3D 4382 6x6x6, 15HP 3E 4382 8x8x10, 15HP

140

4A 4382 8x8x10, 20HP

Ø8.0

Ø8.0

17.2

1A None2A 4382 6x6x10, 10HP 2B 4382 6x6x8, 10HP 3A 4382 6x6x10, 15HP 3B 4382 6x6x6, 15HP

160

4A 4382 6x6x6, 20HP

Ø8.0 Ø8.0 17.2

1A None2A 4382 6x6x10, 10HP 3A 4382 6x6x10, 15HP 3B 4382 6x6x6, 15HP

180

4A 4382 6x6x6, 20HP

Ø8.0 Ø8.0 17.2

Catalog AGZC-2 37

Figure 29, AGZ 190C Dimensions with Pump Package

NOTE:


EVAPPUMP

CONTROLPANEL

M1M3M5M7

SCALE

ALL DIMENSIONS ARE IN DECIMAL INCHES

NONE *R331779025001*

44.00

100.2

44.0

6.66.5

X

2.502.50

11.8

88.00

95.0

CONTROLPANEL


FRONT OR SIDE


CG5.00

3.402.00

4.80

Z

Y

41.62

24.085.2392.7788.6815.50

306.19

17.0

8"VICTAULIC

CONNECTION

EVAPWATEROUTLET

POWER CONNECTIONSOPPOSITE SIDE OFCONTROL BOX

A

43.04EVAP

WATERINLET

32.1

124.25

12.4067.7119.272.834.2

2.0

2.0



L1

L2

L3

L4

L5

L6

L7

L8

M2M4M6M8 BACK VIEW

FRONT VIEW

TOP VIEW

SIDE VIEW NOTES: 1. The dimension drawing depicts the optional dual-pump arrangement, a single pump is standard. 2. Due to variations in pump sizes, operating weight with water is approximate, and may increase up to 5%.


CG LOCATION (in.) LIFTING WEIGHT BY CORNER AGS-C MODEL X Y Z

SHIPPING WEIGHT

(lbs)

OPERATING WEIGHT

(lbs) L1 L2 L3 L4 L5 L6 L7 L8

190C 44.5 36.8 142.7 14352 14834 2098 2147 1889 1934 1661 1700 1445 1478

Table 15, AGZ190C Single and Dual Pumps SINGLE PUMP DUAL PUMPS

AGZ-C MODEL

PUMP OPTION

NUMBER PUMP SIZE

FIELD CONN. INLET SIZE (in.)

A PUMP

OPTION NUMBER

PUMP SIZE FIELD CONN. INLET SIZE

(in.) A

1A None 1A None

2A 4380 6x6x10, 10HP 2A 4382 6x6x10, 10HP

3A 4380 6x6x10, 15HP 3A 4382 6x6x10, 15HP 190

4A 4380 6x6x10, 20HP

Ø8.0 17.2

3B 4382 6x6x6, 15HP

4A 4382 6x6x6, 20HP

Ø8.0 17.2

NOTE: An 8-inch outlet connection is made to the unit evaporator outlet.

38 Catalog AGZC-2

Mounting Weights and Location w/ Pump Package The dimensions for the mounting locations are on the unit’s dimension drawing.

Figure 30, Mounting Locations AGZ030 - 100 AGZ110 - 130 AGZ140 -190

M2 M4 M2 M4 M6 M2 M4 M6 M8

C

ontr

ol

Pane

l End

Con

trol

Pa

nel E

nd

Con

trol

Pa

nel E

nd

M1 M3 M1 M3 M5 M1 M3 M5 M7

Table 16, Mounting Weights MOUNTING WEIGHTS, lbs kg AGZ-C

Size OPERATING. WEIGHT

lbs kg M1 M2 M3 M4 M5 M6 M7 M8 lbs 4035 1089 1060 956 930 030 kg 1832 494 481 434 422

N/A N/A N/A N/A

lbs 4090 1100 1084 960 946 035 kg 1857 499 492 436 429

N/A N/A N/A N/A

lbs 4205 1123 1112 990 980 040 kg 1909 510 505 450 445

N/A N/A N/A N/A

lbs 4335 1123 1179 992 1041 045 kg 1968 510 535 450 473

N/A N/A N/A N/A

lbs 4465 1179 1190 1043 1053 050 kg 2027 535 540 474 478

N/A N/A N/A N/A

lbs 4405 1176 1214 991 1023 055 kg 2000 534 551 450 465

N/A N/A N/A N/A

lbs 4690 1212 1332 1022 1124 060 kg 2129 550 605 464 510

N/A N/A N/A N/A

lbs 4725 1206 1335 1036 1147 065 kg 2145 548 606 470 521

N/A N/A N/A N/A

lbs 5280 1357 1270 1370 1283 070 kg 2397 616 577 622 582

N/A N/A N/A N/A

lbs 6690 1733 2003 1370 1583 075 kg 3037 787 910 622 719

N/A N/A N/A N/A

lbs 6775 1800 2088 1336 1550 080 kg 3076 817 948 607 704

N/A N/A N/A N/A

lbs 6658 1759 2030 1332 1537 090 kg 3023 798 922 605 698

N/A N/A N/A N/A

lbs 6792 1761 2053 1375 1603 100 kg 3084 800 932 624 728

N/A N/A N/A N/A

lbs 8650 1405 1551 1370 1513 1336 1475 110 kg 3927 638 704 622 687 606 670

N/A N/A

lbs 8800 1437 1559 1407 1526 1377 1494 125 kg 3995 653 708 639 693 625 678

N/A N/A

lbs 8945 1479 1627 1420 1562 1361 1497 130 kg 4061 672 739 645 709 618 679

N/A N/A

lbs 13062 1613 1664 1610 1660 1605 1656 1602 1652 140 kg 5930 732 756 731 754 729 752 727 750 lbs 13092 1594 1604 1617 1627 1645 1655 1670 1680 160 kg 5944 724 728 734 739 747 751 758 763 lbs 13213 1616 1647 1628 1660 1643 1675 1656 1688 180 kg 5999 734 748 739 753 746 760 752 766 lbs 14834 1793 1835 1814 1857 1851 1894 1873 1917 190 kg 6735 814 833 824 843 840 860 850 870

Catalog AGZC-2 39

Application Piping Connections On models AGZ 140C to 190C, the ship-loose suction guide assembly, consisting of the suction guide and a short length of pipe must be field installed after receipt of the unit at the job site.

Do not use the pump package inlet assembly to support the return chilled water line. All piping must be supported separately.

A strainer, normally mounted at the inlet of the evaporator, is not required when using a pump package since the suction guide on models AGZ 075 through 190 has a stainless steel strainer and disposable start-up strainer. Models AGZ 030 through 070 are factory equipped with a “Y” strainer with blow-down valve.

Electrical Connections The pump packages are factory-wired and require no field electrical connections.

Pump Control There are three possible pump control arrangements:

1. Single Pump/Single Control; the standard single digital output from the chiller’s microprocessor control starts and stops the pump.

2. Dual Pump/Single Control; the standard single digital output controls the pumps. Pump operation is automatically selected by an alternating relay arrangement. The panel has a selector switch allowing selection of pump A, pump B, or automatic (using relays).

3. Dual Pump/Dual Control; an optional second digital output must be supplied and operation of the pumps is controlled by settings in the microprocessor. The pump output used is determined by the Evap Pump Control setpoint. This setting allows the following configurations:

#1 only – Pump 1 will always be used #2 only – Pump 2 will always be used Auto – The primary pump is the one with the least run hours, the other is used as a backup #1 Primary – Pump 1 is used normally, with pump 2 as a backup #2 Primary – Pump 2 is used normally, with pump 1 as a backup

Primary/Standby Pump Staging The pump designated as primary will start first. If the evaporator state is START for a time greater than the RECIRCULATE TIMEOUT SETPOINT and there is no flow, then the primary pump will shut off and the standby pump will start. When the evaporator is in the RUN STATE, if flow is lost for more than half of the FLOW-PROOF SETPOINT value, the primary pump will shut off and the standby pump will start. Once the standby pump is started, the flow loss alarm logic will apply if flow cannot be established in the evaporator START STATE, or if flow is lost in the evaporator RUN STATE. Auto Control If AUTO PUMP CONTROL is selected, the primary/standby logic above is still used. When the evaporator is not in the RUN STATE, the run hours of the pumps will be compared, and the pump with the least hours will be designated as the primary.

40 Catalog AGZC-2

Freeze Protection In installations where the unit is subject to sub-freezing temperatures, some method of preventing pipe and component freezing and subsequent damage must be employed. The pump package has an outdoor air thermostat (TH1) that will start the pump at 40F to help prevent freeze up. If the chiller is valved out of the building circulation system during freezing temperatures, a valved bypass must be installed between the supply and return lines, on the pump side of the chiller isolation valves. If operation of the chilled water pump during freezing weather is not desired, one or more of the following strategies must be employed:

1. Drain the portion of the system subject to freezing and cap with a nitrogen charge. If the system will be drained, the pump(s) and the interconnecting piping also have to be drained. A drain plug is provided at the very bottom of the pump housing and at the bottom of the evaporator barrel or package piping. Open the appropriate vents to assist in draining. A nitrogen head is recommended to decrease corrosion in the drained portion of the piping

2. Heat trace all outdoor piping and components. If the system is to have field-installed heat tracing, the factory pipe insulation will have to be removed and replaced after the installation of the tracing.

3. Add sufficient anti-freeze to prevent freezing. If an anti-freeze solution is to be used, additional anti-freeze must be added to protect the water in the pump package. Adding a concentration of glycol anti-freeze with a freeze point 10 degrees F below the lowest expected outdoor temperature will result in decreased capacity and increased pressure drop in the chiller. AGZ units can be selected to provide the required capacity with the fluid specified, water or antifreeze. Anti-freeze is recommended since it provides protection during a power failure.

The evaporator heater cable is factory wired to the 115-volt circuit in the control box. This power can be supplied from a separate source, or it can be supplied from the control circuit. Operation of the heater cable is automatic through the ambient sensing thermostat that energizes the evaporator heater cable for protection against freeze-up. Unless the evaporator is drained in the winter, the disconnect switch to the evaporator heater must be closed. Conversely, do not apply heat to the evaporator if it is drained. Table 17, Freeze Protection

PERCENT VOLUME GLYCOL CONCENTRATION REQUIRED FOR FREEZE PROTECTION FOR BURST PROTECTION TEMPERATURE

F (C) ETHYLENE GLYCOL

PROPYLENE GLYCOL

ETHYLENE GLYCOL

PROPYLENE GLYCOL

20 (6.7) 16 18 11 12 10 (-12.2) 25 29 17 20 0 (-17.8) 33 36 22 24

-10 (-23.3) 39 42 26 28 -20 (-28.9) 44 46 30 30 -30 (-34.4) 48 50 30 33

NOTE: Glycol of less than 25% concentration is not recommended. 4.

Catalog AGZC-2 41

Electric Data, With & Without Pumps High Ambient Operation AGZ-C units for high ambient operation (105ºF, 40.1C and above) require the addition of the optional high ambient package that includes a small fan with a filter in the air intake to cool the control panel. All units with the optional VFD low ambient fan control automatically include the high ambient option. Operation of the VFD generates a quantity of panel heat best removed by use of a control panel fan.

Notes for “Electrical Data Single- and Multi-Point” Power: 1. Unit wire size ampacity (MCA) is equal to 125% of the largest compressor-motor RLA plus 100% of RLA

of all other loads in the circuit. 2. The control transformer is furnished and no separate 115V power is required. For both single- and multi-

point power connections, the control transformer is in circuit #1 with control power wired from there to circuit #2. In multi-point power, disconnecting power to circuit #1 disconnects control power to the unit.

3. Wire sizing amps is 10 amps if a separate 115V power supply is used for the control circuit. 4. Recommended power lead wire sizes for 3 conductors per conduit are based on 100% conductor ampacity

in accordance with NEC. Voltage drop has not been included. It is recommended that power leads be kept short. All terminal block connections must be made with copper (type THW) wire.

5. “Recommended Fuse Sizes” are selected at approximately 175% of the largest compressor RLA, plus 100% of all other loads in the circuit.

6. “Maximum Fuse or breaker size” is equal to 225% of the largest compressor RLA, plus 100% of all other loads in the circuit.

7. The recommended power lead wire sizes are based on an ambient temperature of 86° F (30° C). Ampacity correction factors must be applied for other ambient temperatures. Refer to the National Electrical Code Handbook.

8. Must be electrically grounded according to national and local electrical codes. Voltage Limitations: 1. Within 10 percent of nameplate rating. 2. Voltage unbalance not to exceed 2% with a resultant current unbalance of 6 to 10 times the voltage unbalance

per NEMA MG-1, 1998 Standard. Notes for “Compressor and Condenser Fan Amp Draw”: Compressor RLA values are for wiring sizing purposes only. Normal operating current draw at rated capacity may be less than the RLA value. Notes for “Field Wiring Data”

1. Single-point power supply requires a single disconnect to supply electrical power to the unit. This power supply must either be fused or use a circuit breaker.

2. All field wiring to unit power block or optional non-fused disconnect switch must be copper. 3. All field wire size values given in table apply to 75° C rated wire per NEC. Circuit Breakers Factory installed compressor circuit breakers are standard on units with single point power supply only. This option provides unit installed compressor short circuit protection and makes servicing easier.

Connection Type Power Block Disconnect

Swt. Circuit

Breakers High Short Circuit

Current Single Point (Optional) Std Opt. Std Opt Multi-Point (Standard) Std Opt. Not Avail. Not Avail..

Standard Panel Rating (kA) Voltage 030-035 040-080 090-100 110-125 130-160 180-190 208-230 5 10 10 10 10 10

460 5 5 10 5 10 10 575 5 5 5 5 5 10

42 Catalog AGZC-2

Figure 31, AGZ 030C – AGZ 045C, Typical Field Wiring

AGZ030C-045C SCH-700183-00-INDEX2-051

Catalog AGZC-2 43

Figure 32, AGZ 050C – AGZ 180C, Typical Field Wiring Table 18, Unit Amp Draw

AGZ050C-180C SCH-700-183-INDEX2-05

44 Catalog AGZC-2

Unit Amp Draw Table 19, Unit Amp Draw,

RATED LOAD AMPS LOCK ROTOR AMPS FAN MTRS PUMP MTRSCIRCUIT #1 CIRCUIT #2 CIRCUIT #1 CIRCUIT #2

AGZ-C SIZE

VOLTS #1 #3 #5 #2 #4 #6 #1 #3 #5 #2 #4 #6

Qty FLA (EA)

LRA (EA)

HP FLA (EA)

208 31.6 31.6 -- 31.6 31.6 -- 225 225 -- 225 225 -- 4 5.8 23.3 None --230 30.1 30.1 -- 30.1 30.1 -- 225 225 -- 225 225 -- 4 5.8 26.1 None -- 460 16.7 16.7 -- 16.7 16.7 -- 114 114 -- 114 114 -- 4 2.8 13.0 None --

030

575 13.0 13.0 -- 13.0 13.0 -- 80 80 -- 80 80 -- 4 3.0 14.0 None --

208 31.6 31.6 -- 31.6 31.6 -- 225 225 -- 225 225 -- 4 5.8 23.3 2.0 7.5230 30.1 30.1 -- 30.1 30.1 -- 225 225 -- 225 225 -- 4 5.8 26.1 2.0 6.8 460 16.7 16.7 -- 16.7 16.7 -- 114 114 -- 114 114 -- 4 2.8 13.0 2.0 3.4

030

575 13.0 13.0 -- 13.0 13.0 -- 80 80 -- 80 80 -- 4 3.0 14.0 2.0 2.7 208 31.6 31.6 -- 31.6 31.6 -- 225 225 -- 225 225 -- 4 5.8 23.3 3.0 10.6230 30.1 30.1 -- 30.1 30.1 -- 225 225 -- 225 225 -- 4 5.8 26.1 3.0 9.6 460 16.7 16.7 -- 16.7 16.7 -- 114 114 -- 114 114 -- 4 2.8 13.0 3.0 4.8

030

575 13.0 13.0 -- 13.0 13.0 -- 80 80 -- 80 80 -- 4 3.0 14.0 3.0 3.9

208 31.6 31.6 -- 36.3 36.3 -- 225 225 -- 239 239 -- 4 5.8 23.3 None --230 30.1 30.1 -- 36.0 36.0 -- 225 225 -- 239 239 -- 4 5.8 26.1 None -- 460 16.7 16.7 -- 17.9 17.9 -- 114 114 -- 125 125 -- 4 2.8 13.0 None --

035

575 13.0 13.0 -- 13.0 13.0 -- 80 80 -- 80 80 -- 4 3.0 14.0 No

air-cooled scroll compressor chiller · agz chillers are factory-assembled and mounted on a...

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