Goodman Manufacturing Company, L.P.I0-235 2550 North Loop West, Suite 400, Houston, TX 77092 10/03

www.goodmanmfg.com or www.amana-hac.com© 2003 Goodman Manufacturing Company, L.P.

All information contained herein is subject to change without notice.

INSTALLATION & OPERATINGINSTRUCTIONS forPGC & PCC SERIES

COMBINATION HEATING &COOLING OUTDOOR UNITS

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INDEXIntroduction ........................................................... 2Replacement Parts ............................................... 3Important Safety Instructions ................................ 3Codes and Regulations ........................................ 3Dimensional Data .................................................. 4Unit Description..................................................... 5Clearances ............................................................ 6Roof Curb and Assembly and Intructions ............. 6Installation ............................................................. 9Handling and Rigging .......................................... 11Unit Installation on Roof Curb ............................. 12Horizontal Discharge Duct Connection ............... 12Electrical Installation ........................................... 13Gas Supply Piping .............................................. 15Condensate Drain Connection ............................ 16Exterior Wind Shield Installation ......................... 16Check, Test and Start Procedures ...................... 16Control System Check, Testand Start Procedure ............................................ 18Economizer Dampers and FiltersCheck, Test and Start Procedure ........................ 18Evaporator Blower Fan Check,Test and Start Procedure .................................... 18Drive Belt ............................................................ 20Refrigeration System .......................................... 20Gas Heat Check, Test and Start Procedure ....... 22Air Balancing ....................................................... 24Drive Adjustment ................................................. 24Maintenance ....................................................... 24Inspection and Cleaning ..................................... 25

INTRODUCTIONCHECKING PRODUCT RECEIVEDWhen the equipment is received all items should becarefully checked against the bill of lading to be sure allcrates and cartons have been received. Before acceptingdelivery, carefully inspect each carton or crate for visibleshipping damage. If any damage is noticed, the carriershould make the proper notation on the delivery receiptacknowledging the damage. Make notations of all damageon all copies of the bill of lading and have all copiescountersigned by the delivering carrier. The carrier shouldalso fill out a Carrier Inspection Report. The factory TrafficDepartment should then be contacted. File claim fordamage with the carrier. Physical damage to the unit afteracceptance is not the responsibility of GoodmanManufacturing Company, L.P. Unpack each carton or crateand verify that all required parts and proper quantities ofeach item have been received. Refer to drawings for partdescriptions. Report shortages or missing items to yourlocal representative to arrange for replacement parts. Dueto guarantee that all items will be shipped together.Verification of shipments must be limited to only those itemson the bill of lading. The unit nameplate must be checkedto make sure the voltage agrees with the power supplyavailable.BEFORE BEGINNING INSTALLATIONCarefully read all instructions for the installation prior toinstalling unit. Make sure each step or procedure isunderstood and any special considerations are taken intoaccount before starting installation. Assemble all tools,hardware and supplies needed to complete the installation.Some items may need to be purchased locally. Afterdeciding where to install unit, closely look the location over- both the inside and outside of home. Note any potentialobstacles or problems that might be encountered as notedin this manual. Choose a more suitable location ifnecessary.

INSTALLING THE UNITProper installation of the unit helps ensure trouble freeoperation. Improper installation can result in problemsranging from noisy operation to property or equipmentdamages, dangerous conditions that could result in injuryor personal property damage and could void the warranty.Give this booklet to the user and explain it�s provisions.The user should retain these instructions for futurereference.

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REPLACEMENT PARTSORDERING PARTSWhen reporting shortages or damages, or ordering repairparts, give the complete unit model and serial numbers asstamped on the unit�s nameplate.

Replacement parts for this appliance are available throughyour contractor or local distributor. For the location of yournearest distributor, consult the white business pages, theyellow page section of the local telephone book or contact:

SERVICE PARTS DEPARTMENTGOODMAN MANUFACTURING COMPANY, L.P.

2550 NORTH LOOP WEST, SUITE 400HOUSTON, TEXAS 77092

(713) 861 � 2500

IMPORTANT SAFETY INSTRUCTIONSRECOGNIZE SAFETY SYMBOLS, WORDS, AND LABELSThe following symbols and labels are used throughout thismanual to indicate immediate or potential hazards. It isthe owner�s responsibility to read and comply with all safetyinformation and instructions accompanying these symbols.Failure to heed safety information increases the risk ofproperty damage, product damage. serious personal injuryor death.

DANGERIMMEDIATE HAZARDS WHICH WILL RESULT INPROPERTY DAMAGE, PRODUCT DAMAGE, SEVEREPERSONAL INJURY AND/OR DEATH.

WARNINGHAZARDS OR UNSAFE PRACTICES COULD RESULT INPROPERTY DAMAGE, PRODUCT DAMAGE, SEVEREPERSONAL INJURY AND/OR DEATH.

CAUTIONHAZARDS OR UNSAFE PRACTICES WHICH MAY RESULTIN PROPERTY DAMAGE, PRODUCT DAMAGE, AND/ORPERSONAL INJURY.

DANGERDO NOT STORE OR USE GASOLINE OR OTHERFLAMMABLE VAPORS AND LIQUIDS IN THE VICINITY OFTHIS OR ANY OTHER UNIT OR APPLIANCE.

CAUTIONDO NOT DESTROY THESE INSTRUCTIONS. FOR YOURSAFETY, PLEASE READ THIS CAREFULLY AND KEEPTHIS IN A SAFE PLACE FOR FUTURE REFERENCE.

CAUTIONAPPLIANCE IS SHIPPED FROM FACTORY FOR VERTICALDUCT APPLICATION. ACCESSORY HORIZONTAL DUCT KITMUST BE FIELD INSTALLED FOR HORIZONTAL DUCTAPPLICATIONS. SEE HORIZONTAL DISCHARGE DUCTCONNECTIONS FOR DETAILS.

CARBON MONOXIDE POISONING HAZARD

B10259-216

Carbon monoxide producing devices (such as an automobile, space heater, gas water heater, etc.) should not be operated in enclosed areas such as unventilated garages, utility rooms or parking areas because of the danger of carbon monoxide (CO) poisoning resulting from the exhaust emissions. If a furnace or air handler is installed in an enclosed area such as a garage, utility room or parking area and a carbon monoxide producing device is operated therein, there must be adequate, direct outside ventilation.

This ventilation is necessary to avoid the danger of CO poisoning which can occur if a carbon monoxide producing device continues to operate in the enclosed area. Carbon monoxide emissions can be (re)circulated throughout the structure if the furnace or air handler is operating in any mode.

CO can cause serious illness including permanent brain damage or death.

Special Warning for Installation of Furnaces or Air Handling Units in Enclosed Areas such as Garages, Utility Rooms or Parking Areas

SAFETY INSTRUCTIONS IF YOU SMELL GASFor your safety, if you smell gas, follow these instructions:

� Do not try to light any appliances.� Do not touch any electrical switches.� Do not use any phones in your building.� Immediately, call your gas supplier from a neighbor�s

phone.� Follow the gas supplier�s instructions.� If you cannot reach your gas supplier, call the fire

department.

CODES AND REGULATIONS

CAUTIONSHEET METAL PARTS, SCREWS, CLIPS AND SIMILARITEMS INHERENTLY HAVE SHARP EDGES, AND IT ISNECESSARY THAT THE INSTALLER AND SERVICEPERSONNEL EXERCISE CAUTION.

GENERALThe installation of this equipment shall be in accordancewith the regulations of authorities having jurisdiction and allapplicable codes. It is the responsibility of the installer todetermine and follow the applicable codes. This equipmentis to be installed by an experienced installation company

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Vertical Discharge (Factory Configuration)

Horizontal Discharge (With Field Installed Accessory)

*

*

MODEL A HEIGHT

B SUPPLY

AIR

C RETURN

AIR 090 102

36 12 1/2 17 9/16

120, 150 180

52 20 1/4 25 13/16

*Field Installed Accessory.

Dimensional Data - Figure 1All dimensions in inches; no scale.

A B CHEIGHT SUPPLY AIR RETURN AIR

090 36 12 1/2 17 9/16120 52 20 1/4 25 13/16

MODEL

TABLE 1

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FIGURE 2 - TYPICAL COMPONENT LOCATION

PACKAGE GAS PGC VOLTAGE DESIGNATORPACKAGE COOL PCC -3 = 208-230/3/60

-4 = 460/3/60

NOMINAL CAPACITY HEATING INPUT090 = 7½ TONS 195 = 193 MBTUH (INPUT)120 = 10 TONS 225 = 225 MBTUH (INPUT)

PGC 090 2 1 0 3

NOMENCLATURE

and fully trained personnel. System design and installationshould, where applicable, follow information presented inaccepted industry guides such as the ASHRAE Handbooks.The manufacturer assumes no responsibility for equipmentinstalled in violation of any code or regulation. Themechanical installation of the packaged rooftop unitsconsists of making final connections between the unit andbuilding services; supply and return duct connections; anddrain connections (if required). The internal systems ofthe unit are completely factory installed and tested prior toshipment.

UNIT DESCRIPTIONRooftop units are shipped fully assembled and factorytested. They are generally installed on a steel roof mountingcurb assembly which has been shipped to the job site forinstallation on the roof structure prior to the arrival of theunit. The model number shown on the unit�s identificationplate identifies the various components of the unit such asrefrigeration tonnage, heating input and voltage as shownNomenclature.

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CLEARANCESAdequate clearance around the unit should be kept forsafety, service, maintenance, and proper unit operation. Atotal clearance of 75� on the main control panel side of theunit is recommended to facilitate possible fan shaft, coil,electric heat and gas furnace removal. A clearance of 48�is recommended on all other sides of the unit to facilitatepossible compressor removal, to allow service access andto insure proper ventilation and condenser airflow. Theunit must not be installed beneath any obstruction. Theunit should be installed remote from all building exhauststo inhibit ingestion of exhaust air into the unit fresh air intake.

GAS HEAT UNITS1. As indicated in Figure 3 and on the unit�s dataplate, a

minimum clearance of 36� to any combustible materialis required on the furnance access side of the unit. Allcombustible materials must be kept out of this area.

2. This 36� clearance must also be maintained to insureproper combustion air and flue gas flow. Thecombustion air intake and furance flue discharge mustnot be blocked for any reason, including blockage bysnow.

3. Adequate clearances from the furnace flue dischargeto any adjacent public walkways, adjacent buildings,building openings or openable windows must bemaintained in accordance with the latest edition of theNational Fuel Gas Code (ANSI Z223.1)

4. Minimum horizontal clearance of 48� from the furnaceflue discharge to any electric meters, gas meters,regulators and relief equipment is required.

NOTE: Model PGC090 through 120 rooftop units aredesigned for outdoor installation only. They may beinstalled over wood flooring or over Class A, B or Croof covering materials.

FIGURE 3

ROOF CURB ASSEMBLY & INSTALLATIONGENERAL1. Roof curbs are shipped unassembled. Field assembly,

squaring, leveling and mounting on the roof structureare the responsibility of the installing contractor. Allcurb installatons must comply with local codes andshould be done in accordance with the establishedguidelines of the National Roofing ContractorsAssociation.

2. All required hardware necessary for the assembly ofthe sheet metal curb is included in the curb accessory.

3. Full perimeter type curb accessories are available.Cantilever type curbs are not available from factory.Dimensions shown can be used for fabrication in thefield. The full perimeter curb (PGC-5) includes a ductconnection frame to be assembled with the curb. Aseparate duct connection frame can be constructedfor use with the cantilever curb. The unit can be set onthe cantilever curb so that either the condenser end orthe two sides overhang the curb.

4. Curbs must be supported on at least two parallel sidesby roof members. Roof members must not penetratesupply and return duct opening areas.

5. Curb insulation, cant strip, flashings and general roofingmaterials are to be furnished by the contractor. Woodnailing strip and curb gasketing is furnished with curbaccessory.

6. The unit and curb accessories are designed to allowvertical duct installation before unit placement. Ductinstallaton after unit placement is not recommended.

ASSEMBLY

CAUTIONALL CURBS LOOK SIMILAR. TO AVOID INCORRECT CURBPOSITIONING, CHECK JOB PLANS CAREFULLY ANDVERIFY MARKINGS ON CURB ASSEMBLY. INSTRUCTIONSMAY VARY IN CURB STYLES AND SUPERSEDESINFORMATION SHOWN.

Cantilever Curb:1. Position perimeter pieces, items 1 and 2, as shown in

Figure 4. Check lengths of all pieces against bill ofmaterial to insure proper placement and assembly.

2. Assemble side channels, item 1, to front and backchannels, item 2, using bolts washers, lock washers,and nuts, items 3,4,5 and 6. Hand tighten ONLY atthis time.

NOTE: Flanges on item 1 must go outside of item 2and under wood nailer strip. Curb styles may vary socheck curb instructions.

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3. Referring to Table2 and Figure 5, the assembled roofmounting curb should now be checked for squareness.The curb assembly must be adjusted until bothdiagonal measurements, dimension �C�, are equalwithin a tolerance of 1/8�. All hand tightened fastenersshould now be fully secured.

4. Assemble duct connection frame accessory as shownin Figure 6. Fasten pieces together using sheet metalscrews provided (3/8� hex head). NOTE: The ductconnection frame can be oriented two ways when setinto the curb. Frame position must correspond to theintended unit orientation on the curb. The gasketprovided with the duct connection accessory shouldbe applied aafter duct installation. Refer to the �VerticalDischarge Duct Connections� section of theseinstructions.

FIGURE 4 - CANTILEVER CURB JOINT

FIGURE 5 - TYPICAL CURB INSTALLATION

CURB TYPE A B CCANTILEVER 45 63 1/2 77 13/16

FULL PERIMETER 63 9/16 63 9/16 89 7/8

TABLE 2 - CURB DEMENSIONS

FIGURE 6 - CANTILEVER CURB DUCTCONNECTION ACCESSORY

Full Perimeter Curb:1. Position perimeter pieces, item A, as shown in Figures

7 and 8. All perimeter pieces are identical.

2. The duct connection frame, items B and C, should beassembled with the curb as shown in Figures7 and 8.

NOTE: The top of the duct connection frame must beflush with the top of the curb as shown in Figure 8.

3. Fasten pieces together using the sheet metal screws,item D, that are provided. Use three screws at eachcorner of the curb frame, item A when positioned, andtwo screws at each joint of the duct connectionmembers, items B and C.

4. The assembled roof mounting curb should now bechecked for squareness. Referring to Table 2 andFigure 5, the curb assembly must be adjusted until bothdiagonal measurements, dimension �C�, are equalwithin a tolerance of 1/8�.

5. Gasket material sufficient to seal the curb perimeterand the duct connection frame in included and attachedto a duct connection member.

NOTE: Gasket material should not be applied to thecurb perimeter and the duct connection frame until theducts are placed in the frame. Refer to the �VerticalDischarge Duct Connections� section of theseinstructions.

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FIGURE 7 - FULL PERIMETER CURB

FIGURE 8 - FULL PERIMETER CURB

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INSTALLATION1. Place assembled curb in proper location over roof

opening. Check for squareness and adjust if required.

2. Curb installation must be level. One method to achievea level installation is to stretch two diagonal lines acrosscurb and equip them with line levels. There must notbe more than 1/8� spacing between the two lines atthe point of intersection. Should the lines touch at theintersection, recheck by placing the bottom line on top.Shim curb as required to bring it within the specifiedtolerance.

3. Attach the squared and leveled curb to the roofstructure following the industry accepted practice.

4. Install insulation, cant strip, roofing materials, flashing,and counterflashing in accordance with the establishedguidelines of the National Roofing ContractorsAssociation. The finished roof, includingcounterflashing around the curb, must be installed priorto setting the unit on the curb.

VERTICAL DISCHARGE DUCT CONNECTIONSThe unit curb accessories have been designed to allowduct installation before unit placement. Duct installation

after unit placement is possible, but not recommended.Ducts must never be fastened to the bottom of the unitcausing the the base pan to be penetrated. Flexible ductconnectors in the ducts near the unit are recommended.Support all ducts by securing them to the building structure.Weatherproof all external ductwork, joints and roofopenings with flashing and mastic in accordance withapplicable codes. Ducts in an unconditioned space mustbe insulated and covered with a vapor barrier.

DUCT INSTALLATION BEFORE UNIT PLACEMENTDuctwork may be installed prior to unit placement by usinga duct connection frame. Two duct connections framesystems fit into the three possible curb configurations asshown in Figures 8, 9 and 10. The frame to be used withfull perimeter curbs is included with the curbs. It must beassembled and attached to the curb as shown in Figures 7and 8. The frame to be used with either configuration ofthe cantilever curb should be fabricated by installingcontractor. It must be assembled as shown in Figure 6and then set into the curb as shown in Figures 9 and 10.Fastening the frame to the curb is not necessary.

FIGURE 9 - CANTILEVER CURB AND DUCT CONNECTION FRAME KIT (CONDENSER SECTION OVERHANG)

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DUCT INSTALLATIONAfter the duct connection system has been assembled andinstalled, the ductwork may be set in place. To make theconnection, prepare the duct with a 1½ flange as shown inFigures 11 and 12. Afterwards, place the section intoposition on the connection frame. Riveting or bolting isnot necessary and is not recommended. Both ductconnection systems include gasketing, which must beapplied to the connection frame and duct flanges after ductinstallation. Gasket must be installed over the duct flangesso that an airtight seal is made between the unit and theductwork after the unit is placed on the curb.

FIGURE 11 - DUCT PLACEMENT(FULL PERIMETER CURB)

FIGURE 10 - CANTILEVER CURB AND DUCT CONNECTION FRAME KIT (SIDE OVERHANG)

FIGURE 12 - DUCT PLACEMENT (CANTILEVER CURB)

Full Perimeter CurbAll gasketing must be field installed on the full perimetercurbs as shown in Figure 8. After duct sections have beeninstalled, gasketing supplied with the curb accessory shouldbe applied over the duct flanges, exposed connection frameand curb perimeter.

Cantilever CurbAll gasketing must be field installed on the perimeter of thecurb. After duct connection frame and duct sections havebeen set on the curb, gasketing supplied by field should beapplied over duct flanges and exposed frame as shown inFigures 9 and 10.

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DUCT INSTALLATION AFTER UNIT PLACEMENTDuct installation after the unit has been placed is notrecommended. If ductwork must be installed after the unitis placed on the curb, one of the duct connection framesystems should still be used. Apply gasketing to the curband duct connection frames before unit placement asshown in Figures 8, 9, and 10. The duct sections shouldbe fastened to the vertical flanges of the connection frameand curb and sealed as required. Ducts must never befastened to the bottom of the unit causing the the basepan to be penetrated.

HANDLING AND RIGGINGGENERALTo assist in determining rigging requirements, unit weightsare shown as follows:

FIGURE 13 - CORNER & CENTER OFGRAVITY LOCATIONS

DATA090 120

Corner Weight - A1 304 367Corner Weight - B1 245 318Corner Weight - C1 196 267Corner Weight - D1 235 318Center of Gravity - X (in.) 5. 33.5 34.2Center of Gravity - Y (in.) 5. 34.5 34.5Unit Shipping Weight 1. 1000 1290Unit Operating Weight 1. 980 1270Coil Guards 2. 30 40Motorized O.A. Actuator 3. 5 5Economizer 3. 28 39Gas Heat - Model 195 4. 110 120Gas Heat - Model 222 4. 120 130Electric Heater 4. 85 100Full Perimeter Curb 4. 120 120Cantilever Curb 112 112Cantilever Curb Duct Support 27 27

PGC (PCC)

TABLE 3 - UNIT AND COMPONENT WEIGHTS (LBS.) ANDCENTER OF GRAVITY (INCHES)

NOTES:1. Weights are for basic cooling only unit; no options.2. Add 50% of weight listed to corners A and D.3. Add 50% of weight listed to corners B and C.4. Add 25% of weight listed to each corner.5. Center of gravity�s weight are for cooling only units

without options

Provisions for forks have been included in the unit baseframe on three sides. If unit is moved by forklift, no otherfork locations are approved.

CAUTIONIF UNITS ARE TO BE LIFTED TWO AT A TIME, THE FORKHOLES ON THE CONDENSER END OF THE UNIT MUSTNOT BE USED. MINIMUM FORK LENGTH IS 42� TOPREVENT DAMAGE TO THE UNIT; HOWEVER, 48� ISRECOMMENDED.

Do not stand or walk on the unit. Do not drill holes anywherein panels or in the base frame of the unit. Unit accesspanels provide structural support. Do not remove anyaccess panels until unit has been installed on roof curb orfield supplied structure. Do not roll unit across finishedroof without prior approval of owner or achitect. Do notskid or slide on any surface as this may damage unit base.The unit must be stored on a flat, level surface. Protectthe condenser coil because it is easily damaged.

RIGGING DETAILS1. Unit must be lifted by the four lifting holes located at

the base frame corners.

2. Lifting cables should be attached to the unit withshackles as shown in Figure 14.

3. The distance between the crane hook and the top ofthe unit must not be less than 60�.

4. Two spreader bars must span over the unit to preventdamage to the cabinet by the lift cables. Spreaderbars must be of sufficient length so that cables do notcome in contact with the unit during transport. Removewood struts mounted beneath unit base frame beforesetting unit on roof curb. These struts are intended toprotect unit base frame from forklift damage. Removalis accomplished by extracting the sheet metal retainersand pulling the struts through the base of the unit. Referto rigging label on the unit.

CAUTIONDO NOT FORK LIFT UNIT AFTER WOOD STRUTS HAVEBEEN REMOVED; SEVERE DAMAGE WILL OCCUR TO THEBOTTOM OF THE UNIT.

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FIGURE 14 - RIGGING

RIGGING REMOVALRemove spreader bars, lifting cables and other riggingequipment.

UNIT INSTALLATION ON ROOF CURBLOCATIONUnits may look identical, but they can have significantinternal differences. Check specific unit location carefully,referring to plans if necessary, prior to setting the unit.

CURB INSTALLATIONProper unit installation requires that the roof curb be firmlyand permanently attached to the roof structure. Check foradequate fastening method prior to setting the unit on thecurb. Ensure that the top of the duct connection frame isflush with the top of the roof curb. Refer to the �Roof CurbAssembly & Installation� section of this manual. Checkthe top of the curb, duct connection frame and duct flangesto make sure gasket has been applied properly. Gasketshould be firmly applied to the top of the curb perimeter,duct flanges and any exposed duct connection frame. Ifgasket is loose, re-apply using strong weather resistantadhesive.

PROTRUSIONInspect curb to ensure that none of the utility services(electric) routed through the curb protrude above the curb.

CAUTIONDO NOT ATTEMPT TO SET UNIT ON THE CURB IFPROTRUSIONS EXIST.

UNIT INSTALLATIONCarefully lower the unit on the roof curb. While riggingunit, center of gravity may cause condenser end to beslightly lower than supply/return air end. Bring condenserend of unit into alignment with the curb. With condenserend of the unit resting on curb member and using curb asa fulcrum, lower opposite end of the unit until entire unit isseated on the curb. When a rectangular cantilever curb is

used, care should be taken to center the unit. Check forproper alignment and orientation of supply and returnopenings with duct. Refer to the �Roof Curb Assembly &Installation� section of this manual.

CAUTIONDO NOT ALLOW CRANE HOOKS AND SPREADER BARSTO REST ON ON THE ROOF OF THE UNIT.

HORIZONTAL DISCHARGE DUCT CONNECTIONSA 3/4� flange is provded for making duct connections onunits with the optional field installed horizontal dischargekit. Refer to Figure 15. Units not equipped with aneconomizer may be converted from vertical to horizontaldischarge in the field by using accessory number PGHDK120/180-5A (PGC(PCC)120 or PGHDK 090/102-5A(PGC(PCC)090. The kits include parts for conversionto horizontal duct installation. The kit provides 3/4� ductflanges with the dimensions shown in Figure 15 and in theHorizontal Duct Connections Dimensions Table.

Flexible duct connectors between the unit and ducts arerecommended. Insulate and weatherproof all externalductwork and joints as required and in accordance withlocal codes.

FIGURE 15HORIZONTAL DISCHARGE DUCT CONNECTIONS

A B CHEIGHT SUPPLY AIR RETURN AIR

090 36 12 1/2 17 9/16120 52 20 1/4 25 13/16

UNIT SIZE PGC (PCC)

TABLE4 HORIZONTAL DUCT CONNECTIONS DIMENSIONS

ACCESSORY OUTSIDE AIR OPTIONS - FIELD INSTALLEDIf fresh air is required for the installation, three alternativesare available.

Manual Fresh Air Damper-A manual fresh air damper(PGMD-5) is available from the factory for 0% to 25%outside air. Two may used in the locations shown inFigure 2 for maximum 50% outside fresh air.

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Motorized Fresh Air Damper-A motorized fresh airdamper (PGMDM-5) is available also and is mountedin the same locations shown in Figure 2.

Economizer-(PGED 090/102-5 & PGED 120/.180-5)A full modulation enthalpy controlled economizer isavailable from the factory for field installation. It ismounted between fresh air damper blockoff locations.See accessory instructions for installation.

ELECTRICAL INSTALLATION

WARNINGDO NOT TAMPER WITH FACTORY WIRING. THE INTERNALPOWER AND CONTROL WIRING OF THESE UNITS ISFACTORY INSTALLED AND EACH UNIT IS THOROUGHLYTESTED PRIOR TO SHIPMENT. CONTACT THE FACTORYOR YOUR LOCAL REPRESENTATIVE IF ASSISTANCE ISREQUIRED.

INSTRUCTIONS1. The main power supply wiring to the unit and low voltage

wiring to accessory controls must be done inaccordance with these instructions, the latest editionof the National Electriacl Code (ANSI/NFPA 70), andall local codes and ordinances. All field wiring shallconform with the temperature limitations for Type T wire(63°F/35°C rise).

2. Main power and low voltage wiring may enter the unitthrough the side or, with some models and curbconfigurations through the roof curb and base frame.Refer to Figures 16 and 17 for external electricalentrance locations. Refer to Table 5 and Figures 8, 9,10 and 18 for the through-the-curb electrical entrancelocations. Install conduit connectors at the desiredentrance locations. External connectors must beweatherproof. All holes in the unit base must besealed,including around conduit nuts, to prevent waterleakage into building. All required conduit and fittingsmust be supplied by others.

3. It is recommeded that an independant 115V powersource be brought to the vicinity of the rooftop unit forportable lights and tools used by the service mechanic.

FIGURE 16 - EXTERNAL ELECTRICAL ENTRANCELOCATIONS (ELECTRIC HEAT UNITS)

FIGURE 17 - EXTERNAL ELECTRICAL ENTRANCELOCATIONS (NON-ELECTRIC HEAT UNITS)

FIGURE 18 - THROUGH THE CURB ELECTRICALENTRANCE LOCATIONS

POWER LOW VOLTAGE POWER LOW

VOLTAGE POWER LOW VOLTAGE

COOLING ONLY 4 3 8 7 2 1GAS HEAT 4 3 8 7 2 1ELECTRIC HEAT 6 3 5,6 7 N/A 1

MODEL TYPE SIDE OVERHANGCONDENSER OVERHANGFULL PERIMETER

CURB CONFIGURATION

TABLE 5 - THROUGH-THE-CURB ELECTRICALENTRANCE LOCATIONS

ELECTRICAL ENTRANCE LOCATIONS1. Protect wiring from sharp edges. Follow National

Electrical Code and all local codes and ordinances.Do not route wires through removable access panels.

2. Locations 7 and 8 require wiring to exit unit throughthe base rail and then re-enter unit at the externalelectrical entrance locations shown in Figures 9, 16,and 17.

3. Locations 1 and 2 require wiring to be routed throughthe back of the main control box. Refer to Figure 10.

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CAUTIONCONDUIT AND FITTINGS MUST BE WEATHER TIGHT TOPREVENT WATER ENTRY INTO THE BUILDING.

4. Knockouts are provided at locations 3,4,5 and 6.

5. If an external field supplied disconnect is used, thepower wiring will route as follows:a. Power entry location other than location 8. Exit

unit via side location shown in Figures 16 and 17.Enter disconnect box. Connect to the disconnectand leave the disconnect box. Enter the unit againat the side location shown in Figures 16 and 17.

b. Power entry at location 8: Exit the unit via baserail as shown in Figure 9. Enter the disconnectbox, connect to the disconnect and then leave thedisconnect box. Enter the unit again at the sidelocation shown in Figure 17.

It may be easier to penetrate the roof outside the curb ratherthan use Locations 7 and 8.

MAIN POWER WIRING1. The main power supply for the PGC(PCC) 090 through

120 rooftops units shall be three phase, three wire.The unit is factory wired for the voltage shown on theunit�s dataplate.

NOTE: If supply voltage is 208V, lead on primary oftransformer TRANS1 must be moved from the 230Vto the 208V tap.

2. Main power wiring should be sized for the minimumwire ampacity shown on the unit�s database. Size wiresin accordance with the ampacity tables in Artical 310of the National Electrical Code. If long wires arerequired, it may be necessary to increase the wire sizeto prevent excessive voltage drop. Wires should besized for a maximum of 3% voltage drop.

CAUTIONUSE COPPER CONDUCTORS ONLY

3. A weather tight disconnect switch, properly sized forthe unit total load, must be field installed. A non-fusedinternal disconnect can be used which fits into the unitat the locations shown in Figures 16 and 17. Knockoutsfor mounting disconnect are provided in the exteriorpanels. An external, field supplied disconnect may bemounted on the same fixed exterior panel shown inFigures 16 and 17.

NOTE: Do not cover dataplate with field supplieddisconnect switch.

4. Some disconnect switches are not fused. The powerleads must be protected at the point of distribution inaccordance with the unit�s dataplate.

5. The unit must be electrically grounded in accordancewith local codes or, in the absence of local codes, with

the latest edition of the National Electrical Code (ANSII-NFPA 70). A ground lug is provided for this purpose.Size grounding conductor in accordance with Table250-95 of the National Electrical Code. Do not usethe ground lug for connecting a neutral conductor.

6. Power wiring should be connected to the main powerterminal block. This terminal block is located withinthe main control box on units without electric heat (PB1)and within the electrical heat control box on units withelectric heat (PB3).

7. Supply voltage to rooftop unit must not vary by morethan 10% of the value indicated on the unit�s dataplate.Phase voltage unbalance must not exceed 2%.Contact local power company for correction of impropervoltage or phase unbalance.

WARNINGFAILURE OF UNIT DUE TO OPERATION ON IMPROPERLINE VOLTAGE OR WITH EXCESSIVE PHASEUNBALANCE CONSTITUTES PRODUCT ABUSE VOIDINGOUR WARRANTY AND MAY CAUSE SEVERE DAMAGE TOTHE UNIT�S ELECTRICAL COMPONENTS.

LOW VOLTAGE CONTROL WIRING1. A 24 thermostat must be field installed. It may be

purchased with the unit or field supplied. All coolingand heating systems available in Models PGC(PCC)090 through 120 are 2-stage. Thermostats may beprogrammable or electromechanical as required.

2. Locate thermostat or remote sensor in the conditionedspace where it will sense average temperature. Do notlocate the device where it may be directly exposed tosupply air, sunlight or other sources of heat. Followinstallation instructions packaged with the thermostat.

3. Use #18 AWG wire for 24V control wiring runs notexceeding 75 feet. Use #16 AWG wire for 24V controlwiring runs not exceeding 125 feet. Use #14 AWG wirefor 24V control wiring runs not exceeding 200 feet. Lowvoltage wiring may be National Electrical Code (NEC)Class 2 where permitted by local codes.

4. Route thermostat wires from sub-base terminals to theunit. Control wiring should enter through the unit baseframe as shown in Figure 18 or through the fixed sidepanel as shown in Figures 16 and 17. Connectthermostat and any accessory wiring to low voltageterminal block TB1 in the main control box as shownin Figures 19.

NOTE: Field supplied conduit may need to be installeddepending on unit/curb configuration.

NOTE: Use 18 gauge solid conductor wire wheneverconnecting thermostat wires to terminals on sub-base.DO NOT use larger than 18 gauge wire. A transition to18-gauge wire may be required before enteringthermostat sub-base.

15IO-235 10/03

THERMOSTAT

R

G

Y1

W1

Y2

W2

ROOF TOPUNIT TB1

R

G

Y1

W1

Y2

W2

SEE NOTE

SEE NOTE

FIGURE 19 - PGC (PCC) 090 THROUGH 120(COOLING ONLY, GAS HEAT ELECTRIC HEAT)

NOTE: Connections between unit terminals �W1� and�W2� and the corresponding thermostat terminals �W1�,and �W2� are not required on cooling only units.

GAS SUPPLY PIPING

WARNINGIMPROPER INSTALLATION, ADJUSTMENT, ALTERATION,SERVICE OR MAINTENANCE CAN CAUSE PERSONALINJURY OR PROPERTY DAMAGE. REFER TO THE USER�SINFORMATION MANUAL PROVIDED WITH THIS FURNACE.FOR ASSISTANCE OR ADDITIONAL INFORMATION,CONSULT A QUALIFIED INSTALLER, SERVICE AGENCYOR THE GAS SUPPLIER.

LOCATION AND INSTALLATION1. The gas supply piping location and installation on the

rooftop unit must be in accordance with local codes or,in the absence of locals codes, with ordinances of thelatest edition of the National Fuel Gas Code (ANSIZ223.1). A manual gas shutoff valve must be fieldinstalled external to the rooftop unit. In addition, a dripleg must be installed near the inlet connection. A groundjoint union connection is required between the externalshutoff valve and the unit connection to the gas valveto permit removal of the burner assembly for servicing.Union should be located near gas valveas shown inFigure 20. Route gas piping to unit so that it does notinterfere with the removal of access panels. Piping mustbe supported and aligned to prevent strains ormisalignment of the manifold assembly. Refer to Figure20.

2. All units are furnished with standard female NPT pipeconnections. Connection pipe sizes for PGC090through 120 units is 3/4" NPT on 195 and 225 MBHfurnaces. The size of the gas supply piping to the unitmust be based on length of run, number of units onthe system, gas characteristics, BTU requirement andavailable supply pressure. All piping must be done in

accordance with local codes or, in the absence of localcodes, with the latest edition of the National Fuel GasCode (ANSI Z223.1).

NOTE: The gas connection size at the unit does NOTestablish the size of the supply line.

3. These units are designed for either natural or LP gasand are specifically constructed at the factory for onlyone of these fuels. The fuels are NOT interchangeable.However, the furnace can be converted in the fieldfrom natural gas to LP gas with the appropriate factorykit (LPW-06). Only a qualified contractor, experiencedwith natural and propane gas systems, should attemptconversion. Kit instructions must be followed closelyto assure safe and reliable unit operation.

4. With all units on a common line operating under fullfire, natural gas main supply pressure should beadjusted to approximately 7.0" W.C., measured at theunit gas valve. If the gas pressure at the unit is greaterthan 10.5" W.C., the contractor must furnish and installan external type positive shutoff service pressureregulator. The unit will not function satisfactorily ifsupply gas pressure is less than 5.5" W.C. or greaterthan 10.5" W.C.

NOTE: A minimum horizontal distance of 48" betweenthe regulator and the furnace flue discharge is required.

5. With all units on a common line operating under fullLP gas main supply pressure should be at least 11.0",W.C. and must be no greater than 13.0"W.C.,measured at the unit gas valve. Unit will not functionsatisfactorily if supply gas pressure is less than 11.0"W.C. or greater than 13.0" W.C.

6. All pipe connections should be sealed with a pipethread compound, which is resistant to the fuel usedwith the furnace. A soapy water solution should be usedto check all joints for leaks. A 1/8" NPT plugged tap islocated on the entering side of the gas valve for testgauge connection to measure supply (main) gaspressure. Another 1/8" tap is provided on the side ofthe manifold for checking manifold pressure.

CAUTIONTHE FURNACE AND ITS INDIVIDUAL SHUTOFF VALVEMUST BE DISCONNECTED FROM THE GAS SUPPLYSYSTEM DURING ANY PRESSURE TESTING OF THATSYSTEM AT TEST PRESSURES IN EXCESS OF 1/2 PSIG(13.8" W.C.)

CAUTIONTHE FURNACE MUST BE ISOLATED FROM THE GASSUPPLY PIPING SYSTEM BY CLOSING ITS INDIVIDUALMANUAL SHUTOFF VALVE DURING ANY PRESSURETESTING EQUAL TO OR LESS THAN 1/2 PSIG.

16IO-235 10/03

7. There must be no obstruction to prevent the flow ofcombustion and ventilating air. A vent stack is notrequired and must never be used. The power ventorwill supply an adequate amount of combustion air aslong as the air passageways are kept free of anyobstructions and the recommended external unitclearances are maintained. (The wind shield must bein place during furnace operation. See section on windshield installation).

FIGURE 20 - GAS SUPPLY PIPING

CONDENSATE DRAIN CONNECTION1. All units are equipped with a flexible tube condensate

trap which may be connected to either side of the drainpan as shown in Figure 21.

FIGURE 21 - INTERNAL CONDENSATE DRAIN ROUTING

CAUTIONTHE END OF THE TUBE MUST BE ROUTED THROUGHTHE INSULATION AND TOP OF BASE RAIL SO THAT THECONDENSATE HAS FREE ACCESS TO THE ROOF OREXTERNAL DRAINAGE SYSTEM. KNOCKOUTS AREPROVIDED IN THE BASE RAILS. THE UNUSED HOLE ONTHE OPPOSITE SIDE OF THE DRAIN PAN MUST BEBLOCKED WITH THE PLUG PROVIDED.

2. Drainage of condensate directly onto the roof may beacceptable; refer to local code. It is recommended thata small drip pad of either stone, mortar, wood or metalbe provided to prevent any possible damage to the roof.

3. If condensate is to be piped into the building drainagesystem, the drain line must penetrate the roof externalto the unit. Refer to local codes for additionalrequirements. The flexible tube condensate trap maybe connected to an external drain line with a hoseclamp.

4. Due to the fact that drain pans in any air conditioningunit will have some moisture in them, algae and funguswill grow due to airborne bacteria and spores. Periodiccleaning is necessary to prevent this build-up fromplugging the drain and causing the drain pan to overflow.

EXTERIOR WIND SHIELD INSTALLATIONDetails of exterior wind shield installation are as follows:

FIGURE 22 - EXTERIOR WIND SHIELD

MODEL A B C D E090,120 1 1/2" 11" 3 1/2" 8 1/4" 2 1/8"

TABLE 6 EXTERIOR WIND SHIELD DIMENSIONS

CHECK, TEST & START PROCEDURES

WARNINGELECTRIC SHOCK HAZARD COULD CAUSE SEVEREINJURY OR DEATH. FAILURE TO BOND THE FRAME OFTHIS EQUIPMENT TO THE BUILDING ELECTRICALGROUND BY USE OF THE GROUNDING TERMINALPROVIDED OR OTHER ACCEPTABLE MEANS MAY RESULTIN ELECTRICAL SHOCK. DISCONNECT THE ELECTRICPOWER BEFORE SERVICING EQUIPMENT. SERVICE TOBE PERFORMED ONLY BY QUALIFIED PERSONNEL.

17IO-235 10/03

BEFORE STARTUP

WARNINGMOVING MACHINERY HAZARD - DISCONNECT POWERTO THE UNIT AND PADLOCK IN THE �OFF� POSITIONBEFORE SERVICING THE FANS.

This procedure has been prepared as a guide for the properCheck, Test & Start of the rooftop unit. The Check, Test &Start procedure provides a step-by-step sequence which,if followed, will assure the proper startup of the equipmentin the minimum amount of time. Air balancing of ductsystem is not considered part of the Check, Test & Start ofthe roof-top unit. However, it is an important phase of anyair conditioning system startup and should be performedupon completion of the Check, Test & Start procedure. TheCheck, Test & Start procedure at outside ambients below55°F should be limited to a readiness check of therefrigeration system with the required final check andcalibration left to be completed when the outside ambientrises above 55°F.TOOLS REQUIRED TO PERFORM CHECK, TEST & START1. Refrigeration gauge and manifold.2. Voltmeter.3. Clamp-on ammeter.4. Ohmmeter.5. Test lead. Minimum #16 AWG with insulated alligator

clips.6. Manometer for verifying gas pressure 0 to 20" W.C.7. Air temperature measuring device.8. General refrigeration mechanics� tools.

TEMPORARY HEATING OR COOLINGIf it is planned that the unit will be used for temporaryheating or cooling, Check, Test & Start must first beperformed in accordance with this bulletin. Failure to complywith this requirement will void the warranty. New filtersshould be installed after the machines are used fortemporary heating or cooling and the coils, fans, and motorschecked for unacceptable levels of construction dust anddirt.

CONTRACTOR RESPONSIBILITYThe installing contractor must be certain that:� All supply and return air ductwork is in place and

corresponds with installation instructions.� All thermostats are mounted and wired in accordance

with installation instructions.� All electric power, all gas, hot water or steam line

connections, and the condensate drain installationhave been made to each unit on the job. These mainsupply lines must be functional and capable ofoperating all units simultaneously.

PRELIMINARY IN BUILDINGPrior to the beginning of Check, Test & Start procedureson the roof, the following steps should be completed in thebuilding.

CAUTIONWITH THE DISCONNECT ON AND THE THERMOSTAT NOTSATISFIED, THE MACHINE WILL RUN. DO NOT START THEMACHINE UNTIL ALL THE NECESSARY PRECHECKS ANDTESTS HAVE BEEN PERFORMED.

1. THERMOSTAT. Set the thermostat in the conditionedspace at a point at least 10°F below zone temperature.On cooling only models, set the thermostat systemswitch on COOL and the fan switch on AUTO. Onheating/cooling models, set the thermostat systemswitch on AUTO and the fan switch on AUTO.

2. NIGHT SETBACK THERMOSTAT (OPTIONAL). Setthermostat at a point at least 10°F below zonetemperature.

CHECK OF ROOF CURB INSTALLATIONThe proper installation of the unit on the roof curb shouldbe checked. Any deficiencies observed should be noted ina separate report and forwarded to the contractor. The unitand curb assembly should have been installed level. Theflashing of the roof mounting curb to the roof should bechecked, especially at the corners, for good workmanship.CHECK FOR MINIMUM CLEARANCESA minimum of 36" clearance must be provided on the maincontrol box side of the unit. A minimum of 48" clearance isrecommended on all other sides. A clearance of 75" isdesirable on the control box side for removal of the fanshaft or heating section. The outside air intake must beremote from all building exhausts. The condenser air intake(if used) must be remote from all exhausts to assure fullcondenser capacity.CHECK AND REPORT DAMAGEDamaged or missing parts, if any, should be itemized in aseparate report stating what action has been initiated bythe contractor to correct them. The absence of thisinformation will be the basis for assuming that the unit wascomplete and in good condition on date of Check, Test &Start.CHECK FOR OBSTRUCTIONS, FAN CLEARANCE ANDWIRINGDuring the performance of the Check, Test & Startprocedure you will have occasion to work in the varioussections of the unit. It is important that you removeextraneous construction and shipping materials that maybe found during this procedure. All fans should be rotatedmanually to check for proper clearances and make certainthat they rotate freely. Bolts and screws that may have jarredloose during shipment to the jobsite should be checked fortightness. All electrical connections should be re-tightened.

PRE-STARTUP PRECAUTIONSIt is important to your safety that the unit has been properlygrounded during installation. Check ground lug connectionin main control box for tightness prior to closing circuitbreaker or disconnect switch. Verify that supply voltage on

18IO-235 10/03

line side of disconnect agrees with voltage on unitidentification plate and is within the utilization voltage rangeas indicated in Table 7.

MIN. MAX.208-230/60/3 208/230 187 253

480/60/3 460 414 506

UTILIZATION VOLTAGESYSTEM VOLTAGE

NAMEPLATE

TABLE 7 - UTILIZATION VOLTAGE RANGE

System Voltage - That nominal voltage value assigned toa circuit or system for the purpose of designating its voltageclass.

Nameplate Voltage - That voltage assigned to a piece ofequipment for the purpose of designating its voltage classand for the purpose of defining the minimum and maximumvoltage at which the equipment will operate.

Utilization Voltage - The voltage of the line terminals ofthe equipment at which the equipment must give fullysatisfactory performance. Once it is established that supplyvoltage will be maintained within the utilization range underall system conditions, check and calculate if an unbalancedcondition exists between phases. Calculate percent voltageunbalance as follows:

3) PERCENT VOLTAGE UNBALANCE

2) MAXIMUM VOLTAGE DEVIATIONSFROM AVERAGE VOLTAGE

1) AVERAGE VOLTAGE

HOW TO USE THE FORMULA:EXAMPLE: With voltage of 220, 216, and 2131) Average Voltage = 220+216+213=649 / 3 = 2162) Maximum Voltage Deviations from Average Voltage = 220 - 216 = 4

3) Percent Voltage Unbalance = 100 x = = 1.8%

Percent voltage unbalance MUST NOT exceed 2%.

4216

400216

= 100 X

CHECK FIELD DUCT CONNECTIONSVerify that all duct connections are tight and that there isno air bypass between supply and return.

CONTROL SYSTEM CHECK, TEST & STARTPROCEDURECONTROL VOLTAGE CHECKWith disconnect switch in the open �OFF� position,disconnect blue wire from low voltage transformer TRANS1.Close the disconnect switch to energize TRANS1 controltransformer. Check primary and secondary (24V) of controltransformer TRANS1.

THERMOSTAT PRELIMINARY CHECKWith disconnect switch open and blue wire disconnectedfrom TRANS1 transformer, attach one lead of ohmmeterto terminal R on TB1 terminal block. Touch, in order, the

other ohmmeter lead to terminals Y1, Y2 and G at TB1terminal block. There must be continuity from terminal Rto terminals Y1, Y2 and G. R to Y1 indicates first stagecool. R to Y2 indicates second stage cool.R to G indicatesfan (auto). Replace blue wire on TRANS1 transformer.

ECONOMIZER DAMPERS & FILTERS CHECK,TEST & START PROCEDUREFILTER SECTION CHECKRemove filter section access panels and check that filtersare properly installed. Note airflow arrows on filter frames.

FIGURE 23 - FILTER ACCESS

EVAPORATOR BLOWER FAN CHECK, TEST& START PROCEDUREECONOMIZER & DAMPER SECTION CHECKFollow instructions in accessory for check, test & startprocedures.

BEARING CHECKPrior to energizing any fans, check and make sure that allsetscrews are tight so that bearings are properly securedto shafts.

SET EVAPORATOR FAN RPMActual RPM�s must be set and verified with a tachometeror strobe light. Refer to Tables 8 and 9 for basic unit fanRPM. Refer also to �Air Balancing� section of this manual.With disconnect switch open, disconnect thermostat wiresfrom terminals Y1, Y2, W1 and W2. This will prevent heatingand mechanical cooling from coming on. Place a jumperwire across terminals R and G at TB1 terminal block. Closedisconnect switch; evaporator fan motor will operate soRPM can be checked.

CAUTIONAIRFLOW MUST BE ADJUSTED SO THAT TEMPERATURERISE DOES NOT EXCEED 40°F ON ELECTRIC HEAT UNITSWITH 70°F ENTERING AIR.

For gas heat units, the airflow must be adjusted so that theair temperature rise falls within the ranges given in Table11.

19IO-235 10/03

PGC(PCC) CFM

MODEL RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP2600 669 0.44 816 0.59 916 0.75 1004 0.92 1084 1.09 1157 1.28 1226 1.47 1291 1.672000 734 0.53 847 0.69 944 0.85 1030 1.03 1109 1.21 1181 1.4 1249 1.6 1312 1.91

090 3000 770 0.62 877 0.79 973 0.97 1053 1.15 1135 1.34 1206 1.54 1273 1.75 1336 1.963200 807 0.73 909 0.91 1002 1.1 1086 1.29 1162 1.49 1232 1.7 1298 1.91 1360 2.123400 845 0.85 942 1.04 1032 1.24 1114 1.44 1159 1.65 1259 1.87 1324 2.09 1384 2.313400 679 0.73 781 0.98 873 1.26 957 1.58 1034 1.91 1105 2.26 1171 2.26 1233 2.993600 706 0.83 805 1.1 894 1.39 975 1.71 1051 2.05 1121 2.41 1188 2.78 1249 3.17

120 3800 733 0.95 829 1.23 916 1.53 995 1.85 1069 2.2 1139 2.57 1204 2.95 1266 3.364000 761 1.07 855 1.37 938 1.68 1016 2.01 1088 2.36 1156 2.74 1221 3.14 1282 3.554200 790 1.21 880 1.52 961 1.84 1037 2.18 1108 2.54 1175 2.93 1239 3.33 1299 3.754400 818 1.36 906 1.68 985 2.01 1059 2.36 1128 2.73 1194 3.13 1257 3.54 1316 3.97

EXTERNAL STATIC PRESSURE (INCHES W.C.)0.2 0.4 0.6 0.8 1 1.2 1.4 1.6

TABLE 8 - SUPPLY FAN PERFORMANCE DATA (5)

DO NOT SELECT IN SHADED AREAS (FOR INTERPOLATION ONLY)1. Selections in BOLD ITALICS require a field drive change. See Table 8 for drive ranges.2. Selections below heavy line require oversize motor.3. Maximum fan RPM = 15004. Table includes all internal pressure drops including cabinet losses. See Table 27 in product catalog for additional

pressure drops that must be considered as part of external static pressure drop.5. Refer to catalog for fan curves.

PGC (PCC)MODEL

0 1 2 3 4 5090 FAN RPM 1.5 HP MOTOR 1209 1146 1082 1018 955 891120 FAN RPM 3.0 HP MOTOR 1242 1186 1129 1073 1016 960

NOTE: Allow + 5% Variation in blower RPM due to pulley manufacturing tolerances

MOTOR SHEAVE ADJUSTABLE FACTORY SETTINGFAN SHEAVE FIXED 2 TURNS OPENMOTOR SHEAVE - TURN OPEN

TABLE 9 - SUPPLY FAN RPM RANGE

208-230/60/3 460/60/3

PGC(PCC) 090 2 1/2 2.6 1.3

PGC(PCC) 120 2 1/2 2.6 1.3

Note: All values are per compressor

FLAMODEL QUANITY HORSEPOWER

TABLE 10 - CONDENSER FAN MOTORS

195 2256 7

1/16 1/12193,000 225,000154,000 180,000

2600 55.0 -2800 51.1 -3000 47.7 55.6

C 3200 44.7 52.1F 3400 42.1 49.1M 3600 39.7 46.3

3800 - 43.94000 - 41.74200 - 39.74400 - 37.94600 - 36.3

BTUH OUTPUT

MODELNUMBER OF TUBE

VENTOR MOTOR HPBTUH INPUT

TABLE 11- EVAPORATOR FAN MOTORS

NOTES:1. Capacities are approved for altitudes to 2000 feet. At higher elevations, heating

capacity must be reduced 4% (x0.96) for each 1000 feet above sea level.2. Air temperature rise is for total heating capacity. Temperature rises at other

conditions may be calculated by using the formula:

Temperature Rise = Output Capacity (BTUH)

1.08 x CFM (Airflow)3. For altitudes over 2000 feet, air temperature rise must be calculated using the

formula:

Temperature Rise = Output Capacity (BTUH)

14.4 x CFM (Airflow) X Density of Air (Lbs./Cu.Ft.)

4 Two-stage control is standard.5. Output capacity based on nominal 1000 Btu/Ft� natural gas or 2500 Btu/Ft3

propane.6. See nameplate data for maximum air temp. rise for specific unit.

20IO-235 10/03

DRIVE BELTTENSION AND ALIGNMENT ADJUSTMENTCheck drive for adequate run-in belt tension. Correct belttension is very important. A belt that is loose will have asubstantially shorter life, and a belt that is too tight maycause premature motor and bearing failure. Correct belttension on these units can be checked by measuring theforce required to deflect the belt 1/8" at the midpoint of thespan length (Figure 28). Belt tension force can be measuredusing a belt tension checker, available through most beltmanufacturers. The correct deflection force is 5 Ibs. for anew belt and 3.5 Ibs. for a belt that has been run in. Newbelt tension includes initial belt stretch. When new V-beltsare installed on a drive the initial tension will drop rapidlyduring the first few hours. Check tension frequently duringthe first 24 hours of operation. Subsequent retensioningshould fall between the minimum and maximum force. Todetermine the deflection distance from the normal position,use a straightedge or stretch a cord from sheave to sheaveto use as a reference line. On multiple belt drives, anadjacent undeflected belt can be used as a reference.

t = Span length, inchesC = CENTER DISTANCE, INCHESD = LARGER SHEAVE DIAMETER, INCHESd = Smaller sheave diameter, inchesH = DEFLECTION HEIGHT, INCHES

FIGURE 24 - DRIVE BELT TENSION ADJUSTMENT

1 1.5 2 4.0 & Over

Min. - Max.

Min. - Max.

Min. - Max.

Min. - Max.

3 2.0 - 3.0 2.3 - 3.5 2.4 - 3.6 2.6 - 3.9

4 2.6 - 3.9 2.8 - 4.2 3.0 - 4.5 3.3 - 5.0

5 3.0 - 4.5 3.3 - 5.0 3.4 - 5.1 3.7 - 5.6

A

DRIVE RATIO

BELT SECTION

SMALL SHEAVE DIA. (IN.)

TABLE 12RECOMMENDED POUNDS OF FORCE PER BELT

EVAPORATOR FAN ROTATION CHECKCheck that fan rotates clockwise when viewed from thedrive side of unit and in accordance with rotation arrowshown on blower housing. If it does not, reverse the twoincoming power cables at PB1 terminal block. In this case,

repeat bearing check.Do not attempt to change load side wiring. Internal wiringassures all motors and compressors will rotate in correctdirection once evaporator fan motor rotation check hasbeen made.

ELECTRICAL INPUT CHECKMake preliminary check of evaporator fan ampere drawand verify that motor nameplate amps are not exceeded. Afinal check of amp draw should be made upon completionof air balancing of the duct system.

208-230/60/3 460/60/31.5 4.2/4.6 2.13 8.4/8.6 4.2

FLAHORSEPOWER

TABLE 13 - EVAPORATOR FAN MOTORS

RESTORING CONNECTIONSWith disconnect switch open, remove jumper wire fromterminals R and G at TB1 terminal block, and reconnectthermostat wires to terminals Y1, Y2, W1 and W2.

REFRIGERATION SYSTEMCHECK, TEST & START PROCEDURE PRELIMINARY CHECKMake sure that hold-down bolts on compressors are secureand have not vibrated loose during shipment. Check thatvibration grommets have been installed. Visually check allpiping and clamps. The entire refrigeration system has beenfactory charged and tested, making it unnecessary to fieldcharge. Factory charges are shown in Table 14 and on theunit�s nameplate.

PGC (PCC) CHARGE (OZ.)090 115120 150

TABLE 14 - REFRIGERANT CHARGE PER CIRCUIT

Install service manifold hoses. Gauges should readsaturation pressure corresponding to ambient temperature.Charge should be checked to obtain 12° to 15° of sub-cooling per system. (i.e. compressor circuits)

REFRIGERATION SEQUENCE CHECKWith the disconnect switch open, remove the fieldconnected thermostat wire from terminal R on TB1 terminalblock. Place a jumper across terminals R and G, and acrossR and Y1 on TB1 terminal block. Close the disconnectswitch. The following operational sequence should beobserved.1. Current through primary winding of transformer

TRANS1 energizes the 24-volt control circuit.

2. The first stage of cooling is energized when the roomtemperature is above the thermostat set-point. Thethermostat makes R to G and R to Y1.

a. Supply contactor BC is energized.

21IO-235 10/03

b. UNITS WITHOUT ECONOMIZER OPTION: The firststage compressor circuit is energized through low-pressure switch LP1, high pressure switch HP1,and optional Freezestat. Compressors all rotate inthe proper direction. Verification of correct supplyfan rotation at initial startup will also indicate correctcompressor rotation. Reconnect power and checkfor proper operation.

c. UNITS WITH ECONOMIZER OPTION: The firststage of cooling is interlocked through terminal 1and 2 on the economizer module. Control powermust be available to the damper motor DM throughterminal ECON on terminal block IIC (refer toeconomizer instructions). If the outdoor enthalpyis not suitable for cooling, the economizer moduleterminals will be closed permitting the compressorcircuit to be energized.

3. Contactor BC closes its contacts L1, L2 and L3 to T1,T2 and T3 to provide power to the supply fan motor(refer to �Evaporator Blower Fan Check, Test & StartProcedure�). Check supply fan rotation. If the supplyfan is rotating in the wrong direction, disconnect andlock off power block PB1. Do not attempt to changeload side wiring. Internal wiring is set at the factory toassure that the supply fan and compressors all rotatein the proper direction. Verification of correct supplyfan rotation at initial startup will also indicate correctcompressor rotation. Reconnect power and check forproper operation.

4. Contactor C1 closes its contacts L1, L2 and L3 to LT1,T2 and T3 to provide power to the compressor motorCOMP. 1. In addition, contactor C1 closes its contactL3 to T4 , energizing all of the condenser fan motors.

5. Check that the compressors are operating correctly.The scroll compressors in these units must operate inthe proper rotation. Check the compressor dischargeline pressure or temperature.

CAUTIONDO NOT TOUCH BECAUSE DISCHARGE LINE MAY BE HOT.

After each compressor is started, the discharge pressureand discharge line temperature should increase. If thisdoes not occur, and if the compressor is producing anexceptional amount of noise, the compressor motor maybe operating in the wrong direction. If a problem isencountered, it will be necessary to check all of thecompressors and the supply fan motor. If a single motor isoperating backward,check the power wiring for that motorand correct any leads that have been interchanged at thecontactor or at the motor. If all of the motors are operatingbackward, disconnect the unit power supply and lock it inthe �OFF� position. Switch two leads of the power supplyat the unit power terminal block PB1. Reconnect powerand check for compressor and supply fan motor operation.

6. To simulate a second stage mechanical call for coolingfrom the wall thermostat, place a jumper acrossterminals R and Y2 of terminal block TB1. The secondstage of cooling is energized when the roomtemperature is above the thermostat set-point for bothfirst and second stages of cooling. The thermostatmakes R to Y2.

a. UNITS WITHOUT ECONOMIZER OPTION: Thesecond stage compressor circuit is energizedthrough low pressure switch LP2, high pressureswitch HP2, time delay IIC (pin 11 & 12) andoptional freezestat.

b. UNIT WITH ECONOMIZER OPTION: Thesecond stage compressor circuit is interlockedthrough terminals 3 and 4 of the economizermodule (refer to 2c). If the outdoor air enthalpy isnot suitable for cooling, the economizer terminalswill be closed permitting compressor circuit 2 tobe energized.

7. Contactor C2 closes its contacts L1, L2 and L3 to T1,T2 and T3 to provide power to the compressor motorCOMP. 2. In addition, contactor C2 closes its contactL3 to T4 duplicating the power circuit to all of thecondenser fan motors allowing condenser air forcompressor circuit 2 to operate if compressor circuit 1is tripped).

8. With all safety devices closed, the system will continuecooling operation until the thermostat is satisfied.

9. Disconnecting the jumper wire between R and Y2 onTB1 terminal block will simulate a satisfied secondstage of the thermostat. The second stage compressorwill cycle off and IIC (pin 12) will initiate its time delaycycle.

10. Disconnecting the jumper wire between R and Y1 andbetween R and G on TB1 terminal block will simulate asatisfied first stage of the thermostat. The first stagecompressor and the supply fan will cycle off.

11. After a time delay of approximately 3 minutes, thesecond stage compressor control circuits will be readyto respond to a subsequent call for cooling from thewall thermostat.

12. Open disconnect switch. Reconnect the field thermostatwire at terminal R on terminal block TB1.

REFRIGERATION PERFORMANCE CHECKUnder normal summertime (full load) operating conditions,superheat should be between 8°F and 12°F and sub-coolingmeasured at the condenser outlet should be 15°F (nominal).A 25°F to 35°F temperature difference should exist betweenthe entering condenser air and the temperaturecorresponding to the compressor saturated dischargepressure. The adjustable expansion valves can be used toobtain the proper subcooling setting. This is factory setand should not need to be used unless operation is

22IO-235 10/03

unsatisfactory. Check that compressor RLA correspondsto values shown in Table 15. RLA draw can be much lowerthan values in Table 15 at low load conditions and lowambient condensing temperatures. Values in Table 15 canbe slightly exceeded at high load conditions and highambient condensing temperatures.

RLA LRA RLA LRA

PGC(PCC) 090 2 2.9 12.5 88 5.9 44

PGC(PCC) 120 2 3.9 17.4 123 6.8 49.5

Note: All values are per compressor

MODEL208-230/60/3 460/60/3

QTY. HORSE- POWER

TABLE 15 - COMPRESSORS

GAS HEAT CHECK, TEST & START PROCEDURE

WARNINGSHOULD OVERHEATING OCCUR OR THE GAS SUPPLYFAIL TO SHUT OFF, TURN OFF THE MANUAL GAS VALVETO THE APPLIANCE BEFORE SHUTTING OFF THEELECTRICAL SUPPLY.

WARNINGDO NOT FIRE GAS FURNACE WITH FLUE BOX COVERREMOVED. THIS IS EXTREMELY HAZARDOUS.

CAUTIONEXCEPT DURING BRIEF PERIODS WHEN GASPRESSURES ARE BEING MEASURED BY QUALIFIEDSERVICE PERSONNEL, THE FURNACE ACCESS PANELMUST ALWAYS BE SECURED IN PLACE WHEN THEFURNACE IS IN OPERATION. AN INSPECTION PORT INTHE ACCESS PANEL IS PROVIDED TO MONITOR THEFLAME.

GAS SUPPLY PRESSURES & REGULATOR ADJUSTMENTSThe first step in checking out the gas-fired furnace is totest the gas supply piping to the unit for tightness and purgethe system of air using methods outlined in the latest editionof the National Fuel Gas Code (ANSI Z223.1). Verify thatthe disconnect switch is in the �OFF� position. A soapywater solution should be used to check for gas leaks. Sincethe unit is subject to considerable jarring during shipment,it is extremely important that all gas connections and jointsbe tested for tightness. Gas piping downstream from theunit inlet should be checked for leaks during the subsequentsequence check.

The supply gas pressure should be adjusted to 7.0" W.C.on natural gas and 11.0" on propane gas with the gasburners operating. If there is more than one unit on acommon gas line, the pressures should be checked withall units under full fire. A supply pressure tap is providedon the upstream side of the gas valve. A manifold pressure

tap is provided on the manifold as shown in Figure 20. Thenormal manifold pressure for full input is 3.5" W.C. onnatural gas and 9.5" W.C. for propane gas. Minimum gassupply pressure is 5.5" W.C. for natural gas and 11.0" forpropane gas. In order to obtain rating, gas supply pressuremust be 11.0" W.C. for propane gas. The pressure regulatoron propane gas models is adjusted for 9.5" W.C. manifoldpressure and is intended to prevent over-firing only. Do notattempt adjustment of the built-in pressure regulator unlessthe supply pressure is at least 7.0" W.C. on natural gas or13.0" W.C. on propane gas. Check the location of theignition electrode and the flame sensor for correct gapsetting. Refer to Figure 25 and Tables 16 and 17. Due tothe fact that gas appliances located more than 2000 feetabove sea level must be derated 4% per 1000 feet of totalelevation and that variance in gas heating value and specificgravity require change in manifold pressure to obtain rating,it is mandatory that the input be adjusted at the installationsite. All installations should be made as outlined in the latestedition of the National Fuel Gas Code ANSI Z223.1. Thesection entitled �Procedures To Be Followed To Place AnAppliance in Operation� should be followed. Refer also tothe �User�s Information Manual� supplied with the unit foradditional information on the gas furnace.

FIGURE 25

193,000 6 32,200225,000 7 32,000

MAXIMUM INPUT BTUH

NUMBER OF BURNERS

MAXIMUM BTUH PER BURNER

TABLE 16 - HEAT EXCHANGER SPECIFICATIONS

GASFURNACE

NO. OF MAIN CARRYOVER MAIN CARRYOVERTUBES ORIFICES ORIFICES ORIFICES ORIFICES6, & 8 36 (.111�) 58 (.042�) 52 (.070�) 73 (.024�)

DRILL SIZE NUMBER (DIA.)NATURAL GAS LP GAS

TABLE 17 - BURNER ORIFICE SPECIFICATIONS

23IO-235 10/03

SEQUENCE OF OPERATION - GAS HEATING1. This unit has one Manual Reset Limit Control. Check

the limit to make sure it has not tripped. The limit mayarrive at the job site tripped as a result of shippingshock.

2. If the ventor motor comes on, but the unit does notattempt ignition, check if the ALS requires resetting.

3. With electricity and gas turned on, the system switchin the �HEAT� or �AUTO� position and the fan switch inthe �AUTO� position, the thermostat will close the circuitbetween unit terminals R and W1 (R-W1) when thetemperature falls below the thermostat setting.

4. D1 on IIC energizes relay IDMR.

5. Relay IDMR energizes the ventor motor IDM.

6. Operation of the ventor motor closes the centrifugalswitch ES located in the ventor motor. Unlessexcessive temperatures or shipping shock haveopened high limit control ALS, power is fed to theintegrated ignition control, which then initiates a 15-second pre-purge time delay. During this period, theventor motor will clear the combustion chamber of anyresidual gas.

7. After the pre-purge period, the ignition controlenergizes the first stage operator (Wl-C) on the gasvalve and simultaneously initiates a �3-try� sparkignition sequence.

8. When the burners are ignited, a minimum 4 micro-amp DC current will flow through the flame betweenthe sensor electrode and the grounded burner.

9. When the controller proves that the flame has beenestablished, it will keep the gas valve energized anddiscontinue the ignition spark. First stage manifoldpressure will be approximately 1.6" W.C. for naturalgas and 4.5" W.C. for propane.

10. If the control is unable to ignite the burners after itsinitial attempt, it will initiate another purge and sparksequence. A third purge and spark sequence will beinitiated if the second attempt is unsuccessful. If thethird attempt is unsuccessful, the controller will closethe gas valve and lock itself out. It may be reset bymomentarily interrupting power. This may beaccomplished by briefly lowering the room thermostatset-point below room temperature, or by shutting offthe main power to the unit. (See TP-105 for moredetails.)

11. Integrated ignition control will close its normally opencontacts after a delay of approximately 30 seconds.This action energizes contactor BC and starts thesupply fan motor. Operation of the supply fan circu-lates air across the heat exchanger and delivers heatedair to the conditioned space.

12. In the event that the temperature at the thermostatcontinues to fall, the thermostat will also close thecontact between terminals R and W2. This will energizethe second stage of the gas valve (W2-C). After a delayof about 30 seconds, the gas manifold pressure willincrease to approximately 3.5" W.C. for natural gasand 9.5" W.C. for propane.

13. When the space temperature rises, the thermostat willfirst open R-W2 and finally R-W1. Opening R-W1 willcause the gas valve to close, and the furnace to shutdown.

14. The furnace has three high temperature limit controls,which can shut down the burner. They do not shut downthe ventor motor.

LS AUTOMATIC RESET HIGH LIMIT CONTROL.Located in the blower compartment next to the rear blower,its sensing element projects through the blower sectionbulkhead and senses the temperature at the rear of thefurnace. It will cycle the furnace off if the temperatureexceeds 100°F plus maximum rise.ALS AUTOMATIC RESET HIGH LIMIT CONTROL.Located next to LS in the blower compartment, it sensesair temperature within the blower compartment andprotects the filters from excessive temperature. It will shutdown the furnace if it senses excessive temperatures.

RS Manual Reset Flame Rollout Control.Located in the burner compartment on the top shelf behindthe ventor motor, it senses high temperature that couldoccur if the heat exchanger tubes were plugged and theflame was rolling out instead of entering the tubes. It has amanual push-button reset that cannot be actuated until thelimit control has cooled.

INPUT RATINGIt is the responsibility of the contractor to adjust the gasinput to the unit. The input rate can be calculated by usingthe formula:

INPUT Btu/Hr = 3600 X HV

TWHERE:HV = Heating value of fuel = Btu/Ft3 of gasT = Time in seconds per Ft3 of gas flow as read from gas meter

Adjust input rate by varying the adjustment of the gaspressure regulator on the gas valve. See Figure 26. Alladjustments must be made with furnace operating at highfire and at normal operating temperature. Clockwise (!!!!!)rotation of the pressure regulator screw increases pressureand gas flow rate. Turn screw counterclockwise (""""") todecrease pressure and gas flow rate. After adjustment thefurnace temperature rise must be within the range specifiedon the unit data plate. NOTE: Thermal efficiency of thefurnace is a product efficiency rating determined undercontinuous operating conditions independent of anyinstalled system.

24IO-235 10/03

CAUTIONDO NOT EXCEED INPUT RATING OR MANIFOLDPRESSURE VALUES ON THE UNIT DATA PLATE. IF INPUTRATING ON DATA PLATE CANNOT BE ATTAINED WITHOUTEXCEEDING LISTED MANIFOLD PRESSURE, CONTACTYOUR LOCAL SERVICE REPRESENTATIVE.

FIGURE 26 - PRESSURE ADJUSTMENTS

AIR BALANCINGThe drive on the supply fan is typically set in the middle ofthe RPM range. The drive motor sheave pitch diameter isfield adjustable for the required airflow. Refer to �DriveAdjustments� section below.

When the final adjustments are complete, the current drawof the motor should be checked and compared to the fullload current rating of the motor. The amperage must notexceed the service factor stamped on the motor nameplate.The total airflow must not be less than that required foroperation of the electric heaters or the furnace.

The operating balance should be checked with theeconomizer at full outside air and at minimum outside air.Upon completion of the air balance, it is a common industryrecommendation that the variable pitched motor sheavebe replaced with a properly sized fixed sheave. A matchingfixed sheave will provide longer belt and bearing life andvibration free operation. Initially, it is best to have a variablepitched motor sheave for the purpose of air balancing, butonce the balance has been achieved, fixed sheavesmaintain alignment and minimize vibration more effectively.

DRIVE ADJUSTMENTSMOUNTING & ADJUSTING MOTOR SHEAVES VL, VM & 2VPVARIABLE PITCH KEY TYPE SHEAVESMOUNTING:1. All sheaves should be mounted on the motor or driving

shaft with the set screw �A� toward the motor.

2. Be sure both driving and driven sheaves are inalignment and that shafts are parallel.

3. Fit internal key �C� between sheave and shaft, and lockset screw �A� securely in place.

ADJUSTING VL & VM SHEAVES:1. Loosen set screw �B� (5/32" Allen key).

2. Adjust sheave pitch diameter for desired speed byopening moving part by half or full turns from closedposition. DO NOT OPEN MORE THAN FIVE FULLTURNS.

3. Securely tighten set screw �B� over flat.AFTER ADJUSTING:1. Put on belts and adjust belt tension. DO NOT FORCE

BELTS OVER GROOVES.

2. Future adjustments should be made by loosening thebelt tension and increasing or decreasing the pitchdiameter of the sheave by half or full turns as required.Readjust belt tension before starting drive.

3. Be sure that all keys are in place and that all set screwsare tight before starting drive. Check set screws andbelt tension after 24 hours service.

Do not operate sheave with flange projecting beyond thehub end.

FIGURE 27

MAINTENANCE

CAUTIONINSTALLATION AND MAINTENANCE ARE TO BEPERFORMED ONLY BY QUALIFIED PERSONNEL WHOARE FAMILIAR WITH LOCAL CODES AND REGULATIONSAND EXPERIENCED WITH THIS TYPE OF EQUIPMENT.

CAUTIONAVOID SHARP EDGES AND COIL SURFACES BECAUSETHEY ARE POTENTIAL INJURY HAZARDS.

25IO-235 10/03

CAUTIONEXCESSIVE GREASE WILL OVERHEAT THE BEARINGS.USE ONLY A HIGH GRADE LITHIUM BASE GREASE WITHA 200°F SAFE OPERATING TEMPERATURE.

NOTE: Specific greasing instructions may be found on atag attached to the motor. If special lubrication instructionsare shown on the motor nameplate, they will supersede allother instructions.

VENTOR MOTORTo lubricate the ventor motor, remove the furnace accesspanel. Lubricate the motor in two locations as shown inFigure 28. Use SAE 2OW lubricant and add five (5) dropsto each location. The motor should be lubricated at thebeginning of each heating season.

CAUTIONDO NOT OVER LUBRICATE.

WARNINGDO NOT DRIP OIL ON THE GAS VALVE. THE OIL MAYDAMAGE THE NON-METALLIC PARTS AND RENDER THEVALVE INOPERATIVE. REMOVE ANY OIL RESIDUES FROMTHE BURNER COMPARTMENT.

FIGURE 28 - VENTOR MOTOR

INSPECTION & CLEANINGAll flue product carrying areas of the furnace, its ventsystem, and main burners should be examined by aqualified service agency before the start of each heatingseason. This examination is necessary for continued safeoperation. Particular attention should be given todeterioration from corrosion or other sources. Thisexamination is accomplished in the following manner.1. Disconnect power to the unit and remove furnace

section access panel.

2. Refer to Figure 29. Remove burner assembly:

a. Disconnect the three wires from the gas valve afternoting which wires are connected to each terminal.

Preventive maintenance is the best way to avoidunnecessary expense and inconvenience. Have this systeminspected at regular intervals by qualified service personnel,at least twice a year. Routine maintenance should coverthe following items:1. Tighten all belts, set screws, and wire connections.

2. Clean evaporator and condenser coils mechanicallyor with cold water, if necessary. Usually any fouling isonly matted on the entering air face of the coil and canbe removed by brushing.

3. Lubricate motor bearings (see below).

4. Align or replace belts as needed.

5. Replace filters as needed (see below).

6. Check for blockage of condensate drain.

7. Check power and control voltages.

8. Check running amperage.

9. Check operating temperatures and pressures.

10. Check and adjust temperature and pressure controls.

11. Check and adjust damper linkages.

12. Check operation of all safety controls.

13. Examine gas furnaces (see below and the User�sInformation Manual).

14. Check condenser fans and tighten set screws.

FILTERSEvery application may require a different frequency ofreplacement of dirty filters. Filters must be replaced at leastevery three (3) months during operating seasons.

Filters supplied with the units are the disposable type andare as follows:

UNIT SIZE QUANTITY FILTER SIZE PART NO. (ONE FILTER)

090 3 25 x 25 x 2 B13696-123 16 x 25 x 2 B13696-103 20 x 25 x 2 B13696-11

120

TABLE 18 - FILTERS

To remove the filters, remove the filter access panel oneither side of the unit. See Figure 23.

LUBRICATIONThe fan shaft bearings, the 1 to 3 HP supply fan motors,and the condenser fan motors are permanently lubricated.For lubrication of the compressors, use Suniso 3GS, TexacoWF32, or Calumet R015 oils. All three oils are compatibleif mixed, and are suitable for both high and low temperaturesystems.

26IO-235 10/03

b. Disconnect wires from the flame rod and ignitionelectrode.

c. Disconnect the gas piping at the union.

d. The entire burner assembly can now be removedfrom the unit. Note how the front of the burnerassembly nests around wide location tabs, one atthe top and one at the bottom.

3. Remove the flue box cover. The cover consists of twopieces which can be removed as a single unit. Removethe flue baffle.

4. Remove the turbulator from within each heat exchangertube. The end corner of the turbulator mates with thegroove at the tube end seam. To release the turbulator,grip the end of the turbulator with a pliers, force thecorner away from the groove, and pull the turbulatorout of the tube.

5. Inspect the burner assembly, the heat exchanger tubes,the turbulators, the flue box, the ventor fan and theventor fan outlet openings for accumulations of sootand deterioration. Soot can be removed with a flexiblewire brush. The inside of the tubes can be cleanedwith a boiler tube type wire brush. If the bends of thetubes must be cleaned, remove the plate surrounding

the burner end of the tubes. A brush or wad of steelwool can then be pulled through the tube with a cable.Be cautious not to damage the corrosion resistantcoating on the various metal parts. Remove all residue.

6. If deterioration is evident, contact a qualified serviceagency. Minor deterioration of the turbulator ends isnot cause for concern.

7. Upon completion of inspection and cleaning, replaceall parts in the reverse order in which they wereremoved.

CAUTIONUSE ALL SCREWS THAT WERE REMOVED; THEY ARENECESSARY FOR SAFE AND PROPER OPERATION OFTHE UNIT.

8. Inspect and periodically clean the vent outlet (birdscreen) on the access panel.

NOTE: Periodic observation of the flame through theinspection port and a log of C02 measurements arerecommended. This will aid in determining whether thefurnace is operating efficiently or if the furnace requirescleaning.

FIGURE 29 - GAS FIRED FURNACE

27IO-235 10/03

NOTE: SPECIFICATIONS AND PERFORMANCE DATA LISTED HEREINARE SUBJECT TO CHANGE WITHOUT NOTICE

Quality Makes the Difference!All of our systems are designed and manufactured with the same high quality standards regardless of size orefficiency. We have designed these units to significantly reduce the most frequent causes of product failure.They are simple to service and forgiving to operate. We use quality materials and components. Finally, everyunit is run tested before it leaves the factory. That�s why we know. . .There�s No Better Quality.

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