Trane YCZ035F1 User's Manual
Contents
1. 0 0 O O MBK 0 0 G ojo o o o o ojo ojo D 1 x DIP SWITCHES TYPICAL SETTINGS IGN LED DIAGNOSTIC INDICATOR HIGH LIMIT TCO OPEN CHECKOUT PROCEDURE TROUBLESHOOTING CHART SYSTEM FAULTS REFRIGERANT CIRCUIT Liquid Pressure Too high Liquid Pressure Too Low Suction Pressure Too High Suction Pressure Too Low Liquid Refrigerant floodback TXV System Liquid Refrig floodback Cap Tube System D Coil Frosting Compressor Runs Inadequate or No Cooling ELECTRICAL Compressor amp O D fan Do Not Start Compressor Will Not Start But O D Fan Runs O D Fan Won t Start Compressor Hums But Will Not Start Compressor Cycles on IOL I D Blower Won t Start P PRIMARY CAUSES S SECONDARY CAUSES Beetle Page 21 ROUTINE MAINTENANCE BY OWNER You can do some of the periodic maintenance functions for your YCZ F unit yourself this includes replacing the disposable or cleaning the permanent air filters cleaning the unit cabinet cleaning the condenser coil and conducting a general unit inspection on a regular basis When the system is in2. 36 BL B COMMON 47 FAN 44A YL Y COMPRESSOR FIRST STAGE 41A BR HEAT FIRST STAGE 41C BR HEAT SECOND STAGE to 24V 45 COMPRESSOR SECOND STAGE UNIT LOW VOLTAGE AREA G vimi 2 R Y2 TYPICAL 2 STAGE HEAT THERMOSTAT 3 PH POWER ECONOMI ZER ACCESSORY CONNECT I ONS NOTE 1 TO ECONOMI ZER FACTORY PROVIDED FIELD INSTALLED WIRES A see tee 36B BL 44 A4A YL Y1 47 BK FLB 47 l l I l l l l L E OR ABA YL Y2 41A BR 1 41C BR w2 UNIT LOW VOLTAGE AREA eee ey R FIELD INSTALLED JUMPER puczu TYPICAL 2 5 THERMOSTAT NOTES 1 FUSED DISCONNECT SIZE POWER WIRING AND GROUNDING 5 F EQUIPMENT MUST COMPLY WITH CODES INTER COMPONENT WIRING BE SURE POWER SUPPLY AGREES WITH EQUIPMENT AND HEATER NAMEPLATE LINE V J WIRING L 5 2 OW VOLTAGE WIRING BE 18 AWG MINIMUM CONDUCTOR 24V FIELD LINE V f WIRING EE UNIT DIAGRAM FOR ELECTRICAL CONNECTION DETAILS HE THERMOSTAT ON THE GAS ZELECTRIC UNIT MUST PROVIDE 07 SIGNAL IN THE COOLING MODE ONLY DURING THE EATING MODE THE FAN WILL BE ENERGIZED BY THE SYSTEM VIRE COLOR DESIGNATION H FOR SINGLE STAGE T
3. 2 Any reduction of the unit clearances indicated in these illustra tions may result in condenser coil starvation or the recirculation of warm condenser air Actual clearances which appear to be inadequate should be reviewed with a local sales engineer IMPORTANT 1 Remove the Flue and Air Inlet Hood with the gasket from the return air section of the unit The screws that attach the flue and air inlet hood will be installed in their proper location at the factory Therefore they must be removed and then used to attach the flue and air inlet hood 2 Remove the packaging material from the components and secure the Flue and Air Inlet Hood with the gasket to the unit with sheet metal screws as illustrated in Figure 16 on page 14 NOTE Outdoor air or other requirements during heating operation that result in supply air temperatures below 80 degrees F or return air temperatures below 50 degrees F may cause flue gas condensate to form and is to be avoided PLACING AND RIGGING 1 Before preparing the unit for lifting check the outline drawing for center of gravity for lifting safety Because of placement of internal components the unit s weight may be unevenly distrib uted Approximate unit weights are given in Figure 2 page 3 NOTE Accessory BAYLIFTOO2AA a kit of four 4 lifting lugs is required for rigging the unit for hoisting See Figure 7 insert B 2 Insert the four lifting lugs in the openings provided i
4. INSULATE WEATHERPROOF OR RAIN SHIELD FLEXIBLE DUCT CONNECTORS A3 4 inch female NPT condensate drain connection is provided the evaporator access panel end of the unit See Figure 4 Provide a trap and fill it with water before starting the unit to avoid air from being drawn through Follow local codes and standard piping practices when running the drain line Pitch the line downward away from the unit Avoid long horizontal runs See Figure 12 NOTE Do not use reducing fittings in the drain lines The condensate drain must be Made of 3 4 pipe size Pitched 1 4 per foot to provide free drainage to convenient drain system Trapped Must not be connected to closed drain system CONDENSATE DRAIN PIPING OUTDOOR AIR DISCHARGE OUTDOOR AIR INTAKE yer gt 2 INLET HOOD SUPPORT PAD FOUNDATION ey ys ISOLATORS 1 PER CORNER AND 1 UNDER UNIT CONTROL BOX 12 TYPICAL CONDENSATE DRAIN PIPING 3 4 PVC OR COPPER TUBING AND FITTINGS 1 1 2 MIN Page 11 ATTACHING DOWNFLOW DUCTWORK TO ROOF CURB Supply and return air flanges are provided on the roof curb for easy duct installation All ductwork must be run and attached to the curb before the unit is set into place Follow these guidelines for ductwork construction Connections to the unit should be made with three inch canvas connectors to minimize noise and vibration tr
5. When attaching ductwork to a horizontal unit provide a flexible watertight connection to prevent noise transmission from the unit to the ducts The flexible connection must be indoors and made out of heavy canvas NOTE Do not draw the canvas taut between the solid ducts UNIT EXTERIOR WEATHERPROOF UNIT DUCT THIS SEAM FLANGE FIELD DUCT UNIT EXTERIOR UNIT DUCT FLANGE WEATHERPROOF THIS SEAM FIELD DUCT UNIT EXTERIOR WEATHERPROOF UNIT DUCT THIS SEAM FLANGE FIELD DUCT HORIZONTAL Wash clothes separately from other clothing rinse washer thoroughly Operations such as sawing blowing tear out and spraying may generate fiber concentrations requiring additional respiratory protection Use the appropriate NIOSH approved respirator in these situations FIRST AID MEASURES Flush eyes with water to remove dust If symptoms persist seek medical attention Wash affected areas gently with soap and warm water after handling CAUTION Before making the gas pipe connection give seri ous consideration to providing the required clearance neces sary to remove the access panels on the unit e g economizer and filter access panels NOTE n the absence of local codes the installation must conform with American National Standard Z223 1 National Fuel Gas Code Latest Revision The available gas supply must agree with the required gas supply marked on the unit nameplate Minimum permissible
6. REMOVE SCREW NEAREST THE OPENING AND PULL THE PANEL FIRMLY HEATER EXCHANGER TOWARD THE OUTSIDE OF THE UNIT TO TUBES DISENGAGE THE BACK ATTACHMENT RETURN OPENING 2 REMOVE RIGHT HAND SCREW AND MOVE PANEL TO THE RIGHT OR RE MOVE BOTH SCREWS REQUIRED CLEARANCE FOR UNIT INSTALLATION AND ROOF PENETRATION HOLE SIZE REQUIRED HORIZONTAL SUPPLY AIR COVER SERVICE SERVICE CLEARANCE CLEARANCE WOOD NAILER wono lt YCZ050F 18 WITH FRESH AIR ACCESSORY 30 WITH ECONOMIZER Page 6 HORIZONTAL AIRFLOW APPLICATION 1 9 These units are design certified for outdoor installations These units may be installed directly on wood flooring or on Class A Class B or Class C roof covering material The discharge air from the condenser fans must be unrestricted for a minimum of 3 feet above the unit NOTE The unit is shipped for horizontal installation The Air Inlet Hood in the combustion blower access panel must have adequate clearance around the air opening into the combustion area See Outline Drawing Figure 3 Examine all flue product carrying areas of the furnace its vent system and the main burner for safe operation A periodic inspection of the furnace should be made by a qualified service agency at the start of each heating season Replacement parts list for this Gas Electric Air Conditioner may be obt
7. UNIT OVERHANG ON THE YCZ036 060F MODELS INSTALLATION PLACING THE UNIT ON A MOUNTING CURB 1 The unit is designed with a perimeter drip lip that is lower that the unit base bar see Figure 7 inset A 2 Position the unit drip lip down over and in contact with the outside corner of the curb as illustrated in Figure 8 insert A Continue to lower the unit on top of the curb with the unit drip lip astraddle and in contact with both the end and side rail of the curb The unit should now rest on top of the curb Take the two 2 hold down brackets shipped with the curb and secure the unit to the curb with hold down brackets as illus trated in Figure 8 insert A BASE OF UNIT DRIP LIP ON PERIMETER OF UNIT REST ON TOP OF CURB RAILS EXISTING SHEET METAL SCREW HOLD DOWN BRACKET WITH FLANGE OF CURB Page 9 INSTALLATION ROOFTOP UNITS 4 Place the unit on the frame or roof curb Refer to Figures 9 or 10 For roof top applications using a field fabricated frame and ducts use the following procedure 5 Secure the unit to the frame or roof curb 1 The frame must be located and secured by bolting or welding 6 Insulate any ductwork outside of the structure with at least two to the roof Flashing is required 2 inches of insulation and then weatherproof There must be a weatherproof seal where the duct enters the structure 2 The hole in the roof must be prepared in advance of installi
8. a level mounting surface for the unit In addition be sure to provide sufficient height above the roof to prevent water from entering the unit NOTE This unit was shipped for horizontal installation Con vert to downflow per instructions Remove covers from the downflow supply and return air open ings and place them over the horizontal supply return air openings painted side out and secure with sheet metal screws See Figure 6 Be sure the mounting curb spans structural members trusses of the roof thereby providing sufficient support for the weight of the unit the curb the duct s and any factory or field installed accessories See Figures 1 7 8 9 10 and 11 Be sure the hole in the structure for the ducts is large enough to accommodate the fabricated ducts and the insulation sur rounding them See Figure 4 Note lf any internal accessories to be added to the unit install them at the shop if at all practical These units are design certified for outdoor installation These units may be installed directly on wood flooring or on Class A Class B or Class C roof covering material The discharge air from the condenser fans must be unrestricted for a minimum of 3 feet above the unit The air inlet hood in the combustion blower access panel must have adequate clearance around air openings into the combus tion area See Outline Drawing Figure 3 continued on next page Page 7 continued from pa
9. at the end of the gas supply line near the unit Be sure the tapped gas cock is downstream of the pressure regulator if used SCHEMATIC DIAGRAM OF GAS PIPING TO UNIT DEALER INSTALLED GROUND UNION 1 8 N P T PLUGGED ACCESS FOR TEST GAUGE CONNECTION FIELD SUPPLIED MAIN GAS VALVE MUST BE INSTALLED BY DEALER OUTSIDE UNIT Page 13 GAS PIPING INSTALLATION NOTE The shut off gas cock mus unit and should meet the specifications of all applicable national and local codes 2 Install a ground union joint downstream of the shut off cock This joint must also be installed outside of the unit AREENATE MANUAL 3 Install a drip leg at least six 6 inches in depth next to the union 2 Sh Acket PUGNE as shown in Figure 14 This drip leg is required to collect any sediment that may be deposited in the line 4 Before connecting the piping circuit to the unit bleed the air from the supply line Then cap or plug the line and test the pressure at the tapped shut off cock The pressure reading 1ST STAGE should not exceed 14 inches water column SIZ ALLEN DETAIL 82 AL 5 Using an appropriate backup wrench on the gas valve inlet GAS VALVE boss connect the gas piping to the unit Check the completed piping for leaks using a soap and water solution or the equiva lent 6 After installation of the gas pipe in the unit the pipe chase opening should be closed with the filler oarrier plug provided MANI
10. cancer birth defects or other reproductive harm NOTICE Warnings and Cautions appear at appropriate locations throughout this manual Read these carefully Axwarnine Indicates a potentially hazardous situation which if not avoided could result in death or serious injury Indicates a potentially hazardous situation which if not avoided may result in minor or moderate injury It may also be used to alert against unsafe practices and where property damage only accidents could occur Page 2 TYPICAL ROOFTOP INSTALLATION WITH FULL PERIMETER CURBS YCZ036 050 060F Models FIELD SUPPLIED SUPPORTS AT EACH END OF CURB ROOF INSULATION ROOF DECK FIELD SUPPLIED RIGID INSULATION 2 TYPICAL ROOFTOP INSTALLATION WITH BAYCURB030A 038A YCZ036 050 060F Models FIELD SUPPLIED AT EACH END OF CURB ROOFING a ROOF INSULATION FIELD SUPPLIED CANT STRIP FIELD SUPPLIED RIGID INSULATION ROOF MOUNTING CURB RETURN AIR DUCT NOTES SUPPLY AIR DUCT 1 The YCZ036F models extend out past this end of the curb ONLY 2 The 2050 YCZO60F models extend past both the end and the side of the curb as illustrated Page 3 DIMENSIONAL DATA YCZ036 050 060F OUTLINE BACK SUPPLY amp ECONOM ZER F ILTER EVAPORATOR COIL amp ACCESS PANEL BLOWER PANEL CENTER OF GRAVITY KNOCKOUT amp CONDUIT FOR VOLTAGE CONNECTION 5 13761 BUSH
11. constant operation In new homes check the filters every week for the first four 4 weeks If you have disposable type filters replace them with new filters ofthe same type and size Do not attempt to clean disposable filters Permanent type filters can be cleaned by washing them with a mild detergent and water Make sure that the filters are thor oughly dry before reinstalling them in the unit or duct system NOTE It may be necessary to replace permanent filters annually if washing fails to clean the filter or if the filter shows signs of deterioration Be sure to use the same type and size as was originally installed CONDENSER COIL Unfiltered air circulates through the unit s condenser coil andcan cause the coil s surface to become clogged with dust dirt etc To clean the coil vertically i e with the fins stroke the coil surface with a soft bristled brush Be sure to keep all vegetation away from the condenser coil area AWARNING TO PREVENT AN EXPLOSION OR POSSIBLE INJURY DEATH AND EQUIPMENT DAMAGE DO NOT STORE COMBUSTIBLE MATERIALS GASOLINE MAINTENANCE PERFORMED BY SERVICEMAN COOLING SEASON To keep your unit operating safely and efficiently the manufac turer recommends that a qualified serviceman check the entire system at least once each year and any other time that you feel is needed Your serviceman should examine these areas of your DCX F unit filters for cleaning or replac
12. in accordance with applicable local and national codes e Areall covers and access panels in place to prevent air loss and safety hazards STARTING THE UNIT IN THE COOLING MODE CAUTION Before starting the system on the cooling cycle turn the thermostat switch to OFF and close the unit disconnect switch This procedure energizes the compressor crankcase heater vaporizing any liquid refrigerant in the crankcase This is a precaution against foaming at start up which could damage the compressor bearings Allow the heater to operate a minimum of eight 8 hours NOTE See the section on Sequence of Operation for a description of the cooling operating sequence To start the unit in the cooling mode set the thermostat system switch to COOL and move the thermostat COOL indicator to a setting below room temperature The condenser outdoor fan motor compressor and evaporator indoor fan motor will operate automatically OPERATING PRESSURES After the unit has operated in the cooling mode for a short period of time install pressure gauges on the gauge ports of the discharge and suction line valves Check the suction and discharge pressures and compare them to the normal operating pressures provided in the unit s SERVICE FACTS Page 18 START UP NOTE Do not use the pressures from the unit s SERVICE FACTS to determine the unit refrigerant charge The correct charge is shown on the unit nameplate To charge the system accur
13. roof mounted check the appropriate building codes for weight distribution requirements Refer to the applicable roof curb mounting instruction Check the unit s nameplate for supply voltage required Determine if adequate electrical power is available The furnace may be installed on Class A B or C roofing material LOCATION AND CLEARANCES Installation of the unit should conform to local building codes or in the absence of local codes to the National Fuel Gas Code ANSIZ223 1 Latest Revision and the National Electrical Code Canadian installations must conform to CSA and local codes Select a location that will permit adequate combustion and ventila tion air in accordance with Section 5 3 Air For Combustion and Ventilation of the National Fuel Gas Code ANSIZ223 1 Latest Revision or applicable provisions of the local building code Page 8 LOCATIONS AND RECOMMENDATIONS INSTALLATION 15 Access and service clearances for the unit must be given careful consideration when locating the duct entrance open ings Figure 4 provides unit dimensions 16 All fabricated outdoor ducts should be as short as possible CLEARANCES 1 The recommended clearances for single unit installations are illustrated in Figure 4 These minimum requirements are not only an important consideration when determining unit place ment but they are also essential to ensure adequate service ability maximum capacity and peak operating efficiency
14. the required range SEQUENCE OF OPERATION Operation of the unit heating or cooling cycles is controlled by the setting of the system switch on the room thermostat Once the system switch is placed either in the HEAT or COOL position unit operation is automatic A fan switch on the thermostat also provides for it continuous operation of the evaporator fan when desired The fan switch ON position provides continuous opera tion while the AUTO position provides operation during the heat ing or cooling cycles HEATING CYCLE Thermostat call for heat 2 stage thermostat Call for 1st stage only R and W1 thermostat contacts close signaling the control mod ule IGN to run its self check routine After the control has verified that the pressure switch PS contacts are open the limit switch TCO contacts are closed and the flame rollout FL switch is closed the induced draft blower CBM will be energized on high speed for approximately 15 seconds After the induced draft blower CBM has come up to speed the control will verify that the pressure switch PS contacts are closed and switch the induced draft blower to low speed for an additional 5 seconds of prepurge The gas valve GV is energized in the first stage to permit gas flow and the spark ignitor IP is energized The flame detector FD confirms that ignition has been achieved within the 7 second trial period As the flame detector confirms th
15. these illustra tions may result in condenser coil starvation or the recirculation of warm condenser air Actual clearances which appear to be inadequate should be reviewed with a local engineer LOCATIONS AND RECOMMENDATIONS 1 The 3 See the unit s nameplate for the absolute minimum clearance between the unit and any combustible surface s IMPORTANT 1 Remove the Flue and Air Inlet Hood with gasket from the return air section of the unit The screws that attach the flue and air inlet hood will be installed in their proper location at the factory Therefore they must be removed and then used to attach the flue and the air inlet hood Remove the packaging material from the components and secure the Flue and Air Inlet Hood with the gasket to the unit with sheet metal screws as illustrated in Figure 5 See Firing Rate Selection section for additional information NOTE Outdoor air or other requirements during heating operation that result in supply air temperatures below 80 degrees F or return air temperatures below 50 degrees F may cause flue gas condensate to form and is to be avoided DOWNFLOW APPLICATION CURB MOUNTING Roof Mounting Curb field assembled BAYCURB030 038 033 034A or a field fabricated curb must be in place before the unit is hoisted to the roof top The Roof Mounting Curb frame must be installed ona flat level section of the roof maximum of 1 4 per foot pitch and provide
16. ESS OR IMPLIED IN LAW OR IN FACT INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR PARTICULAR USE AND IN NO EVENT SHALL WARRANTOR BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES Some states do not allow limitations on how long an implied limited warranty lasts or do not allow the exclusion or limitation of incidental or consequential damages so the above limitation or exclusion may not apply to you This limited warranty gives you specific legal rights and you may also have other rights which vary from state to state Parts will be provided by our factory organization through an authorized service organization in your area listed in the yellow pages If you wish further help or information concerning this limited warranty contact American Standard Inc GW 631 1802 Troup Highway Tyler TX 75711 9010 Attention Manager After Sales Support This limited a is for residential usage of this equipment and not applicable when this ae T SS RALEA purchaser uses the product for other than personal family or household purposes Page 23 LIMITED WARRANTY COMBINATION GAS ELECTRIC AIR CONDITIONER YCZ YCY YCX YCC YCD YCH YCP YHC and YSC Models Less Than 20 Tons for Commercial Use Parts Only his warranty is extended by American Standard Inc to the original purchaser and to any succeeding owner of the real property to which the Combination Gas Electric Air Co
17. FOLD PRESSURE BRACKET Check the manifold pressure at the unit gas valve Do not exceed the recommended pressure shown on the unit nameplate FLUE AND HOOD ILLUSTRATION FLUE DUCT GASKET FLUE DUCT TOP ACCESS PANEL INLET HOOD GASKET 664399 14 INPUT CHECK AND ADJUSTMENT 1 Make sure all gas appliances are off except the furnace 2 Clock the gas meter with the furnace operating determine the dial rating of the meter for one revolution 3 Match the column in the gas flow in cfh Table 3 with the time clocked 4 Read the Flow column opposite the number of seconds clocked Use the following factors if necessary For 1 Cu Ft Dial Gas Flow CFH Chart Flow Reading 2 For 1 2 Cu Ft Dial Gas Flow CFH Chart Flow Reading 4 For 5 Cu Ft Dial Gas Flow CFH 10X Chart Flow Reading 4 Multiply the final figure by the heating value of the gas obtained from the utility company and compare to the nameplate rating This must not exceed the nameplate rating N Changes can be made by adjusting the manifold pressure a Attach a manifold pressure gauge b Remove the slot screw on top of the gas valve for 1st stage manifold pressure adjustment Remove slot screw on outlet side for 2nd stage adjustment See Figure 17 c Turn the adjustment nut in to increase the gas flow rate and out to decrease the gas flow rate using a 3 32 hex wrench Note If Model
18. HERMOSTATS JUMPER W1 AND W2 TOGETHER ABBR COLOR COLOR 5 5 ECOND STAGE HEAT WILL BEGIN 10 MINUTES AFTER FIRST BLACK PR_ PURPLE TAGE BLUE RD_ RED BROWN WHITE GREEN YELLOW ORANGE Page 17 PRE START QUICK CHECKLIST 15 the unit properly located and level with the proper clearance See Figure 4 15 the duct work correctly sized run taped insulated and weatherproofed with proper unit arrangement See Ductwork Installation section gas piping correctly sized run trapped and purged of air See Gas Piping section Is the condensate line properly sized run trapped and pitched Isthe filter of the correct size and number Is it clean and in place 15 the wiring properly sized and run according to the unit wiring diagram Are all the wiring connections including those in the unit tight Has the unit been properly grounded and fused with the recom mended fuse size See Wiring Data 15 the thermostat level correctly wired well located and set for the proper heat anticipation Have the air conditioning systems been checked at the service ports for charge and leak tested if necessary Does the condenser fan and indoor blower turn free without rubbing and are they tight on the shafts Has the indoor blower speed been determined and the proper speed been set See the Unit Wiring Diagram Has all work been done
19. ING amp CONDUIT FOR LO VOLTAGE CONNECTION 48 MM I DIA ENTRY FOR 13MM 1 21 N P T GAS CONNECTION DOWNF L OW SUPPLY CONDENSATE DRAIN FOR OPENING 19 MM 3 4 FEMALE NPT 4 DOWNF LOW RETURN HOR I ZONTAL RETURN OPENING D667953 L amp M DIMENS I ONAL SURFACE SEE TABLE 5 B i APPEARANCE SURFACE OF SUPPLY amp RETURN PANEL SECT Y Y TYPICAL CROSS SECTION OF DOWNFLOW SUPPLY amp X X RETURN PERIMETER FLANGES TYPICAL CROSS SECTION OF SUPPLY amp RETURN PERIMETER FLANGES 8 3 4 3 4 MODEL 1 2 1 2 25 12 1 2 25 12 17 12 10 YCZ036F 157 528 36 29 3716 3 16 18916 18916 11 11 016 916 11 016 916 11 109 1 65 1 8 45 33 3 8 21 1 16 15 1 16 4 15 16 9 1 8 21 15 16 20 14 3 1 2 8 5 16 4 DIMENSIONAL DATA YCZ036 050 060F OUTLINE FRONT CONTROL BOX ACCESS PANEL COMBUST I ON BLOWER ACCESS ACCESS CONDENSER COIL 1 amp GUARD 1221 25 MM 171 DIA FOR 13 11 21 GAS CONNECTION D667952 COMBUSTIBLE MATERIAL Bonom 00 Erse 60 SIDE 60 18 WITH FRESH AIR ACCESSORY 30 WITH ECONOMIZER woe ole 2050 YCZO60F M 65 1 8 33 3 8 27 15 16 Page 5 5 CONVERTING HORIZONTAL DOWNFLOW NOTE a SUPPLY OPENING 1
20. ION COULD OCCUR CAUSING INJURY OR DEATH IMPORTANT The furnace and its individual shut off valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures exceeding 1 2 psig 3 48 kPa The furnace must be isolated from the gas supply piping system by closing its individual manual shut off valve during any pressure testing of the gas supply piping system at test pressures less than or equal to 1 2 psig 3 48 kPa GAS SUPPLY LINE PRESSURE Before connecting the unit to the gas supply line be sure to determine the gas pressure in the line If the gas supply pressure is excessive above 14 inches water column or 1 2 psig install a pressure regulator either at the supply source or in the branch circuit serving the unit Once the regulator is installed set it to provide a pressure of 7 inches water column with the unit operating and no greater than 14 inches water column with the unit not firing NOTE Gas pressure in excess of 14 inches water column 1 2 psig may damage the regulator while improper regulation may result at pressures lower than 5 5 inches water column at the unit inlet If the supply line pressure is below the minimum supply pressure indicated on the unit nameplate contact the gas supply company Follow these steps to complete the installation of the unit gas piping See Figure 14 1 Install a tapped Style A 1 8 inch NPT tap shut off gas cock
21. OPERATION 0647 Product Section Unitary N A N Product Packaged Gas Electric Model YCZ Literature Type Installation Operation Maintenance ALL phases of this installation must comply with December 07 NATIONAL STATE AND LOCAL CODES File No SV UN RT YCZ IOM 1F 12 02 Supercedes New Model 8 2036 1 3 0 4MOA Single Package Two Stage YCZ050F1 3HOA H YCZ060F1 3M0B 4M0A Gas Electric 16 SEER 2 Convertible 3 4 5 Ton LIFTING LUG KIT IMPORTANT This Document is customer property and is to remain with this unit Please return to service information pack upon completion of work AAAI T T T T SSS Z S A WARNING HAZARDOUS VOLTAGE DISCONNECT POWER BEFORE SERVICING All phases of this installation must comply with the NATIONAL STATE amp LOCAL CODES In the absence of local codes the installation must conform with National Electric Code ANSI NFPA 70 or LATEST REVISION Since Trane has a policy of continuous product and product data improvement it reserves the right to change design and specification without notice 2002 American Standard Inc All rights reserved 12 02 IMPORTANT Read this entire manual before beginning installation procedur
22. WARRANTIES AND LIABILITIES WHETHER IN CONTRACT OR IN NEGLIGENCE EXPRESS OR IMPLIED IN LAW OR IN FACT INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR PARTICULAR USE AND IN NO EVENT SHALL WARRANTOR BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES Some states do not allow limitations on how long an implied warranty lasts or do not allow the exclusion or limitation of incidental or consequential damages so the above limitation or exclusion may not apply to you This warranty gives you specific legal rights and you may also have other rights which vary from state to state American Standard Inc Troup Highway Tyler TX 75711 9010 Attention Manager After Sales Support GW 606 4800 This warranty is for commercial usage of said equipment and not applicable when the equipment is used for a residential application Commercial use is any application where the end purchaser uses the product for other than personal family or household purposes Since Trane has a policy of continuous product and product data improvement it reserves the right to Trane Uj change design and specification without notice 6200 Troup Highway Tyler TX 75707 9010 C US A business of AmericanStandard Companies Technical Literature Printed in U S A Page 24
23. YCZ036F1 3M is installed a region where NOX must be below 40 nanograms per input to 72 000 BTUH HIGH ALTITUDE INSTALLATION Unit nameplate ratings are based on equipment operation from sea level to 2000 feet elevation above sea level If the unit installation is from 2000 4500 feet elevation it will be necessary to change the burner orifices to the noted sizes ref National Fuel Gas Code sec 8 1 2 Appendix F Table F4 GAS MAN PRESS ORIFICE SIZE ORIFICE SIZE TYPE in W C 0 2000 ft 2000 4500 ft NATURAL FACTORY SHIPPED GAS PIPING INSTALLATION TABLE 3 GAS FLOW IN CUBIC FEET PER HOUR 2 CUBIC FOOT DIAL Sec Flow Sec Flow Sec Flow Sec 8 900 29 248 50 144 82 88 9 800 30 240 51 141 84 86 10 720 31 232 52 138 86 84 11 655 32 225 53 136 88 82 12 600 33 218 54 133 90 80 13 555 34 212 55 131 92 78 14 514 35 206 56 129 94 76 15 480 36 200 57 126 96 75 16 450 37 195 58 124 98 73 17 424 38 189 59 122 100 72 18 400 39 185 60 120 104 69 19 379 40 180 62 116 108 67 20 360 41 176 64 112 112 64 21 343 42 172 66 109 116 62 22 327 43 167 68 106 120 60 23 313 44 164 70 103 124 58 24 300 45 160 72 100 128 56 25 288 46 157 74 97 132 54 26 277 47 153 76 95 136 53 27 267 48 150 78 92 140 51 28 257 49 147 80 90 144 50 2nd Stage Hi Manifold Pressure Adjustment 1st Stage Lo Manifold Pressure A
24. a The combustion blower is energized b The pressure switch is closed c The gas valve opens and the ignitor lights the burner d Cycle the thermostat on and off a few times to check out the control system and burner operation characteristics 4 With the burners operating check the manifold pressure with a manometer Do not exceed recommended pressures 5 Adjust the unit to obtain an air temperature rise with that specified on the unit nameplate 6 NOTE For manifold pressures and orifice sizes for gas with other BTU ratings contact the local gas utility Manifold pressure should be 3 3 inches water column 0 1 Input must not exceed the value shown on the rating plate 7 Setthe heat anticipator of the thermostat to equal the amperage draw of the gas valve approximately 0 7 8 Set the thermostat at the desired temperature setting and the unit will function automatically STARTING THE UNIT IN THE GAS HEATING MODE 1 Check to make sure all grilles and registers are open and all unit access doors are closed before start up 2 Purge the gas supply line of air by opening the union ahead of the unit When the odor of gas is detected retighten the union and wait five 5 minutes before proceeding 3 Set the wall thermostat to its lowest position and place the fan switch in the AUTO or ON position 4 Open the main gas valve s and turn on the unit power supply 5 Reset the heating temperature lever on the room ther
25. ained by contacting your local manufacturer representative NOTE If any internal accessories be added to the unit install them at the shop if at all practical Location of the unit must allow service clearance around it Clearance of the unit must be given careful consideration See Figures 2 3 and 4 IMPORTANT Air outlet duct must have 1 clearance to combustible material downstream from the unit Check the handling facilities to ensure the safety of personnel and the unit s CAUTION MUST BE TAKEN AT ALL TIMES TO AVOID PERSONAL INJURIES AND OR DAMAGE TO EQUIPMENT The unit must be mounted level for proper drainage of water through the holes in the base pan The unit must not be exposed to direct roof water runoff Flexible duct connectors must be of a flame retardant material All duct work outside of the structure must be insulated and weatherproofed in accordance with local codes Holes through exterior walls must be sealed in accordance with local codes All fabricated outdoor ducts should be as short as possible CLEARANCES 1 The recommended clearances for single unit installations are illustrated in Figure 4 These minimum requirements are not only an important consideration when determining unit place ment but they are also essential to ensure adequate service ability maximum capacity and peak operating efficiency Any reduction of the unit clearances indicated in
26. ansmission Elbows with turning vanes or splitters are recommended to mini mize air noise and resistance The first elbow in the ductwork leaving the unit should be no closer than two feet from the unit to minimize noise and resistance DUCTWORK AIR PROOF THIS SEAM UNIT BASE FIELD DUCT UNIT DUCT FLANGE AIR PROOF THIS SEAM UNIT DUCT FLANGE UNIT BASE FIELD DUCT AIR PROOF THIS SEAM UNIT BASE FIELD DUCT UNIT DUCT FLANGE UNIT BASE UNIT DUCT FLANGE WATERPROOF SEAM WITH BUTYL OR SILICONE NOT RECOMMENDED The following warning complies with State of California law Proposition 65 AWARN l NG This product contains fiberglass wool insulation Fiberglass dust and ceramic fibers are believed by the State of California to cause cancer through inhalation Glasswool fibers may also cause respiratory skin or eye irritation PRECAUTIONARY MEASURES Avoid breathing fiberglass dust Use a NIOSH approved dust mist respirator Avoid contact with the skin or eyes Wear long sleeved loose fitting clothing gloves and eye protection Page 12 Eye Contact Skin Contact ATTACHING HORIZONTAL DUCTWORK TO UNIT All conditioned air ductwork should be insulated to minimize heating and cooling duct losses Use a minimum of two 2 inches of insulation with a vapor barrier The outside ductwork must be weatherproofed between the unit and the building
27. at ignition has been achieved the delay to indoor fan on period begins timing and after approximately 45 seconds the indoor blower motor IDM will be energized at low speed and will continue to run during the heating cycle Call for 2nd stage after 1st stage R and W2 thermostat contacts close signaling a call for second stage heat The induced draft motor CBM is energized on high speed and the gas valve on second stage After approximately 30 seconds the control energizes the indoor blower on high speed 2nd stage satisfied 1st stage still called R and W2 opens the induced draft blower is reduced to low speed the gas valve is reduced to first stage After aprox 30 seconds the indoor blower motor is reduced to low speed 1st stage satisfied R and W1 opens the gas valve GV will close The induced draft blower CBM will be de energized after approximately 5 seconds postpurge The indoor blower motor IDM will continue to run for the fan off period field selectable 60 or 90 seconds by jumpers then will be de energized by the control module Thermostat satisfied R and W1 W2 jumpered contacts open signaling the control module to close the gas valve and de energize the induced draft blower after approximately 5 second postpurge The 1 0 blower motor will continue to operate at the current speed for 60 or 90 seconds after the flames are extinguished SAFETY SEQUENCES This product is equipped with safety devi
28. ately weigh in the charge according to the unit nameplate VOLTAGE With the compressor operating check the line voltage at the unit The voltage should be within the range shown on the unit name plate If low voltage is encountered check the size and length of the supply line from the main disconnect to the unit The line may be undersized for the length of the run COOLING SHUT DOWN Place the system selector in the OFF position or reset thermostat at a setting above room temperature Do not de energize the main power disconnect except when unit is to be serviced Power is required to keep the heat pump compres sor warm and boil off refrigerant in the compressor HEATING CYCLE NOTE See Sequence of Heating Operation These units are equipped with a solid state ignition control that lights the burners each time the thermostat calls for heat The burners are extinguished during the OFF cycle The gas heating section of the unit can be started using the following procedure 1 Be sure the thermostat is at its lowest setting and the power to the unit is off a Turn the main shutoff valve on the gas supply line ON b Turn or switch the manual valve on the combination gas valve ON position 2 Be sure the burner compartment access panel is in place a Turn on the electrical power to the unit b Turn the thermostat to the highest setting in the heating cycle 3 As the thermostat calls for heat the system cycles as follows
29. building structure Be sure all connections are made tight See Figure 18 NOTES For branch circuit wiring main power supply to unit disconnect wire size for the length of run should be determined using the circuit ampacity found on the unit nameplate and the For more than 3 conductors in raceway or cable see the N E C for derating the ampacity of each conductor GROUNDING THE UNIT MUST BE ELECTRICALLY GROUNDED IN ACCORDANCE WITH LOCAL CODES OR THE NATIONAL ELECTRIC CODE Page 16 FILTER INSTALLATION ELECTRICAL WIRING TABLE 4 UNIT NOMINAL FILTER FILTER CFM Sq Ft SIZE RESISTANCE Filters must be installed in the return air system The above square footages are based on 300 F P M face velocity If permanentfilters are used size per mfg recommendation with clear resistance of 0 05 WC NOTE Unit must be grounded for ignitor to operate prop erly Gas pipe to unit is not an adequate ground Ground the unit internally as provided See wiring diagram for location CONTROL WIRING CLASS 11 Low voltage control wiring should not be run in conduit with power wiring unless Class 1 wire of proper voltage rating is used Route the thermostat cable or equivalent single leads of No 18 AWG colored wire from the thermostat subbase terminals through the rubber gromment on the unit See Figures 3 and 4 for the control entry location Make connections as shown on the unit wiring diagram and
30. ces to protect against abnormal conditions The temperature limit switch TCO is located in the gas com partment on the vestibule panel above the burner assembly This automatic reset device protects against excessive leaving air temperature If this device opens the gas valve is immediately closed and will not permit operation until the limit switch closes Page 19 The rollout switch FS is located the gas compartment near the inlet of the burners This is a single use device designed to protect against any form of flame rollout If this device is opened the gas valve is immediately de energized and the control IGN will lockout the system The rollout switch FS must be replaced before operation is allowed to continue The pressure switch PS is located in the upper right side of the gas compartment This automatic device assures adequate combus tion air pressure If pressure against the induced draft blower outlet becomes excessive the pressure switch will react and shut off the gas valve until acceptable combustion pressure is again available If the control IGN does not sense flame within the first trial for ignition period The gas valve will be de energized The control IGN will initiate a 60 seconds interpurge Following the interpurge on the second trial the gas valve will be energized on second stage high heat input If the flame is sensed within 10 seconds after the second try and only call for first sta
31. djustment Switch Toggles ON or OFF Page 15 AIR FILTERS Filters are to be used with the YCZ036 050 060F heating cooling units The basic unit does not have filters in it However a filter frame accessory is offered that will allow filters to be installed within the unit Otherwise a filter rack must be installed by the installer in the duct work Affix the filter label supplied with the unit adjacent to the filter area ELECTRICAL CONNECTIONS Electrical wiring and grounding must be installed in accordance with local codes or in the absence of local codes with the National Electrical Code ANSI NFPA 70 Latest Revision ELECTRICAL POWER It is important that proper electrical power be available for the unit Voltage variation should remain within the limits stamped on the unit nameplate DISCONNECT SWITCH Provide an approved weatherproof disconnect either on the side of the unit or within close proximity and within sight of the unit OVER CURRENT PROTECTION The branch circuit feeding the unit must be protected as shown on the unit rating plate POWER WIRING The power supply lines must be run in weathertight conduit to the disconnect and into the bottom of the unit control box Provide strain relief for all conduit with suitable connectors Provide flexible conduit supports whenever vibration transmission may cause a noise problem within the
32. door coil Any local transportation related service labor diagnosis calls refrigerant and related items are not included NOTE If your Combination Gas Electric Air Conditioner is installed within one mile of salt water including but not limited to seacoasts and inland waterways your outdoor coil warranty as stated above is limited to five years from the date of original purchase In addition if the steel heat exchanger fails because of a manufacturing defect within the sixth through twentieth year from the date of original purchase Warrantor will furnish without charge a replacement heat exchanger Any local transportation related service labor and diagnosis calls are not included This limited warranty does not cover failure of your combination gas electric air conditioner if it is damaged while in your possession damage caused by unreasonable use of the combination gas electric air conditioner and or damage from failure to properly maintain the combination gas electric air conditioner as set forth in the Use and Care manual see Proper Maintenance section This limited warranty applies to product installed on or after 10 1 2001 where product is manufactured after 1 1 2000 This limited warranty is not retroactive to any installations prior to 10 1 2001 or on product produced prior to 2000 THE LIMITED WARRANTY AND LIABILITY SET FORTH HEREIN ARE IN LIEU OF ALL OTHER WARRANTIES AND LIABILITIES WHETHER IN CONTRACT OR IN NEGLIGENCE EXPR
33. ement motors and drive system components economizer gaskets for possible replacement safety controls for mechanical cleaning electrical components and wiring for possible replacement and connection tightness condensate drain for cleaning unit duct connections to see that they are physically sound and sealed to the unit casing unit mounting support for structural integrity the unit for obvious unit deterioration MAINTENANCE PERFORMED BY SERVICEMAN HEATING SEASON Complete the unit inspections and service routines described below at the beginning of each heating season Page 22 MAINTENANCE Visually inspect the unit to ensure that the airflow required for combustion and condenser coil is not obstructed from the unit Inspect the control panel wiring to verify that all electrical connections are tight and that the wire insulation is intact Check the operation of the gas ignition system as follows Turn off the gas supply with the unit operating to verify that the gas valve closes and that a ignition cycle is initiated by the unit Visually inspect the inside of the burners and the burner ports for deposit buildup and corrosion Wipe and brush the inside of the burner and the burner ports and then clean with a dry cloth If the deposit buildup or corrosion is excessive replace the burners FLUE CLEANING Before each heating season the flue should be inspected for signs of flakin
34. es AWARNING BODILY INJURY CAN RESULT FROM HIGH VOLTAGE ELECTRICAL COMPONENTS FAST MOVING FANS AND COMBUSTIBLE GAS FOR PROTECTION FROM THESE INHERENT HAZARDS DURING INSTALLATION AND SERVICING THE ELECTRICAL SUPPLY MUST BE DISCONNECTED AND THE MAIN GAS VALVE MUST BE TURNED OFF IF OPERATING CHECKS MUST BE PERFORMED WITH THE UNIT OPERATING IT IS THE TECHNICIANS RESPONSIBILTY TO RECOGNIZE THESE HAZARDS AND PROCEED SAFELY Read this manual carefully before attempting to install operate or perform maintenance on this unit Installation and mainte nance should be performed by qualified service technicians only As shipped from the factory this unit is for use with natural gas only and is listed by Underwriters Laboratory Model YCY F heating cooling units are designed for outdoor mounting with a vertical condenser discharge They can be located either at ground level or on a roof in accordance with local codes or National Fuel Gas Code ANSI Z223 1A Latest Revision Since these units are designed exclusively for outdoor operation additional flue venting systems are not required Each unit contains an operating charge of Refrigerant 22 as shipped INSPECTION 1 Check for damage after the unit is unloaded Report promptly to the carrier any damage found to the unit Do not drop the unit IMPORTANT The use of spreader bars is required when hoisting the unit to prevent damage to sides and top 2 Check the un
35. g rust and soot deposits Dirty flues should be cleaned by qualified service personnel ONLY using the following procedure 1 Turnthe room thermostatto the OFF position Turn the main power disconnect OFF Turn the manual gas valve OFF 2 Remove the flue cap the lower access panel and the upper access panel 3 Remove the combustion blower assembly from the fluebox Remove the flue box and the flue restrictors 4 Remove all wires from the gas value while carefully noting their location 5 Disconnect the gas supply line from the valve 6 Remove the manifold retaining screws and pull the burner manifold assembly from the heat exchanger 7 Remove the inlet turbulators being careful not to break or damage them 8 Wipe the flue box and flue baffles clean with a clean dry cloth 9 CAUTION Never use combustible cleaning fluids on any part of the furnace 10 Replace all gaskets with new ones 11 Replace all damaged or broken turbulators with new ones 12 Reassemble the unit by reversing Steps 2 through 7 above Take care that all gaskets seat properly 13 Check all wires for correct installation by referring to the unit s electrical wiring diagram 14 Leak test all gas line connections with a soap and water solution or the equivalent 15 Reinstall the top and bottom access panels and the flue stack 16 Visually inspect the unit to ensure that the airflow opening for combustion is not obstructed 17 Fol
36. gas supply pressure for purpose of input adjustment must be at least 7 0 in w inches water column for natural gas and 11 w c for LP gas PIPE DELIVERY SCHEDULE NOTE The following procedure and tables below apply to Natural Gas only 1 Obtain from the gas company the heating value and specific gravity of the gas delivered 2 Determine the exact length of pipe needed 3 Read BTUH input nameplate on the furnace 4 Use the multiplier opposite the specific gravity of the gas given in Table 1 below and insert in the following formula Furnace Input in BTUH CFH as Heat Content in BTU Cu Ft X Multiplier TABLE 1 This will give the factor for columns 2 through 6 in Table 2 OTHER THAN 0 60 5 Using Table 2 select the pipe length nearest to yours TABLE 2 6 Follow this line vertically down to the exact CFH found in Step 4 above or the next highest value NATURAL GAS ONLY FOR VARIOUS PIPE SIZES AND LENGTHS inch 10 70 3 4 278 190 152 130 115 105 1 1 4 520 440 400 THIS TABLE IS BASED ON PRESSURE DROP OF 0 3 INCH W C AND 0 6 SP GR GAS 7 Read horizontally to the left of this column for the required pipe size diameter GAS PIPING INSTALLATION NOTE f this is an LPG application consult your LPG supplier for pipe sizes and deliveries GAS PRESSURE SETUP PRECAUTIONS AWARNING NEVER USE AN OPEN FLAME TO TEST FOR GAS LEAKS AN EXPLOS
37. ge 7 Examine all flue product carrying areas of the furnace its vent system and the main burner for safe operation A periodic inspection of the furnace should be made at the start of each heating season Replacement parts list for this Gas Electric Air Conditioner may be obtained by contacting your local manufacturer representa tive 6 Location of the unit must allow for service clearance around it Clearance of the unit must be given careful consideration See Figure 4 7 IMPORTANT The air outlet duct must have one 1 inch clearance to combustible material downstream from the unit 8 Exhaust vents or other sources of contaminated air should not be near the unit s air inlet if outside air is to be introduced as makeup air or a ventilation feature is to be used 9 Check the handling facilities to ensure the safety of personnel and the unit s 10 Caution must be taken at all times to avoid personal injuries and or damage to the equipment 11 The unit must be mounted level for proper drainage of water through the holes in the base pan 12 The unit must not be exposed to direct roof water runoff 13 Flexible duct connectors must be of a flame retardant material All duct work outside of the structure must be insulated and weatherproofed in accordance with local codes 14 Roof flashing must be installed to seal the roof curb cavity and must conform to local building codes UNIT SUPPORT If the unit is to be
38. ge exists the gas valve will be reduced to first stage If the second try is not successful The control will start other 60 second interpurge After the interpurge a third attempt will be tried The gas valve will be energized on second stage high heat input If the flame is sensed within 10 seconds after the third try and only call for first stage exists the gas valve will be reduced to first stage If the third try is not successful The control will lock out If loss of flame occurs during a heating cycle the control IGN will close the gas valve The control will than recycle the ignition sequence then ignition is not achieved it will shut off the gas valve and lock out the system If control lock out occurs the control IGN will retry a complete ignition sequence in 1 hour The control IGN can be reset by removing power to the unit or by turning the thermostat from on to off for approximately three seconds then back on COOLING CYCLE Thermostat call for cool 2 stage thermostat Call for 1st stage only With the room thermostat system switch in the COOLING position and the fan switch in the AUTO position the Y1 thermostat contacts closes to the micro board the board will wait 3 seconds to check if the Y2 may also be calling the micro will energize CC1 and the outdoor fan relay for low speed and the G thermostat contact to G IGN and to G1 on the ICMC is energized The status lig
39. ht is flashing and the Y1 light is on The energized compressor contactor CC1 completes the circuit to the compressor CPR1 If the compressor safety controls closed the compressor 1 will operate with the outdoor fan motor ODM on low speed The indoor fan motor IDM will operate on low speed The thermostat will continue to cycle the compressor and fans to maintain the desired temperature With the thermostat fan switch in the ON position the G thermostat contact is closed to G1 on the ICMC board and the indoor fan motor IDM will continue to run on low speed regardless of compressor and condenser fan operation Page 20 SEQUENCE OF OPERATION Call for 2nd stage after 1st stage The Y2 thermostat contact closes to the control board For 1 minute both compressors are off all lights are flashing for 1 minute than the board will energize the CC2 compressor contactor and the outdoor fan relay for high speed then the board YCZ050 ONLY will energize the CC1 and 1 second later the CC2 compressor contactors and the indoor fan high to the Y on the ICMC board is energized for indoor high speed fan operation The status light is flashing and the Y1 and Y2 lights on 2nd stage satisfied 1st stage still called YCZ036 060F ONLY The Y2 thermostat contact opens to the control board For 1 minute both compressors are off the status and Y1 light are flashing for 1 minute than the board will e
40. in Figure 18 Do not short thermostat wires since this will damage the control transformer Recommended wire sizes and lengths for installing the unit thermo stat are provided in Table 5 The total resistance of these low voltage wires must not exceed one 1 ohm Any resistance in excess of 1 ohm may cause the control to malfunction because of the excessive voltage drop TABLE 5 THERMOSTAT WIRE SIZE AND MAXIMUM LENGTH WIRE SIZE MAXIMUM Ft THERMOSTAT HEAT ANTICIPATOR The thermostat heat anticipators should be set to 4 amps on single or two stage thermostats IMPORTANT Upon completion of wiring check all electrical connections including factory wiring within the unit make sure all connections are tight Replace and secure all electrical box covers and access doors before leaving the unit or turning on the power to the unit ELECTRICAL WIRING After all electrical wiring is complete set the thermostat system the Thermostat System Switch until power has been applied long switch in the OFF position so that the compressor will not run enough to evaporate any liquid R 22 in the compressor It is and then apply power by closing the system main disconnect recommended that the sump heater be energized for eight 8 hours switch This will activate the compressor sump heat Do not change prior to starting YCZ F FIELD WIRING DIAGRAM PACKAGED GAS ELECTRIC UNIT UNIT CONTROL BOX THERMOSTAT CONNECTIONS
41. it s nameplate to determine if the unit is correct for the intended application The power supply must be adequate for both the unit and all accessories 3 Check to be sure the refrigerant charge has been retained during shipment Access to 1 4 flare pressure taps may be gained by removing the furnace compartment access panel GENERAL INFORMATION IMPORTANT DO NOT CONNECT GAS PIPING TO THE UNIT UNTIL A LINE PRESSURE TEST HAS BEEN COMPLETED DAMAGE TO THE GAS VALVE MAY RESULT IN AN UNSAFE CONDITION THIS UNIT SHOULD NEVER BE EXPOSED TO GAS LINE PRESSURE IN EXCESS OF 14 INCHES WATER COLUMN 1 2 PSIG IMPORTANT RECONNECT ALL GROUNDING DEVICES ALL PARTS OF THIS PRODUCT CAPABLE OF CONDUCTING ELECTRICAL CURRENT ARE GROUNDED IF GROUNDING WIRES SCREWS STRAPS CLIPS NUTS OR WASHERS USED TO COMPLETE A PATH TO GROUND ARE REMOVED FORSERVICE THEY MUST BE RETURNED TO THEIR ORIGI NAL POSITION AND PROPERLY FASTENED IMPORTANT ALL POWER LEGS MAY NOT BE BROKEN BY CONTACTORS SEE WIRING DIAGRAM ON UNIT CONTROL BOX COVER THIS UNIT AS SHIPPED FROM THE FACTORY IS DE SIGNED FOR NATURAL GAS ONLY BEFORE STARTING THE COMPRESSOR THE CRANKCASE HEATER SHOULD BE ENERGIZED FOR EIGHT HOURS The following warning complies with State of California law Proposition 65 AWARN ING hazardous casses Exposure to fuel substances or by products of incomplete fuel combustion is believed by the state of California to cause
42. low the start up procedure above to place the unit back in service AWARNING DO NOT OPERATE THE UNIT WITHOUT THE EVAPORATOR FAN ACCESS PANEL IN PLACE REINSTALL THE ACCESS PANEL AFTER PERFORMING ANY MAINTENANCE PROCEDURES ON THE FAN OPERATING THE UNIT WITHOUT THE ACCESS PANEL PROPERLY INSTALLED MAY RESULT IN SEVERE PERSONAL INJURY OR DEATH LIMITED WARRANTY COMBINATION GAS ELECTRIC AIR CONDITIONER YCZ YCY AND YCX Models Less Than 20 Tons for Residential Use Parts Only This limited warranty is extended by American Standard Inc to the original purchaser and to any succeeding owner of the real property to which the Combination Gas Electric Air Conditioner is originally affixed and applies to products purchased and retained for use within the U S A and Canada If any part of your Combination Gas Electric Air Conditioner fails because of a manufacturing defect within five years from the date of the original purchase Warrantor will furnish without charge the required replacement part Any local transportation related service labor diagnosis calls air filters refrigerant and related items are not included In addition if the sealed motorcompressor s fail s or the outdoor coil should become defective either or both events occurring because of a manufacturing defect within the sixth through tenth year from the date of original purchase Warrantor will furnish without charge the required replacement compressor and or out
43. mostat at the highest value above room temperature The combustion blower motor should energize The main burners should light within 20 25 seconds Initial start may be delayed somewhat if the unit has not been purged and air is trapped in the gas line NOTE Blue smoke produced by the heat exchanger during the initial burner firing is caused by a thin film of oil on the surface of the heat exchanger This oil will burn off quickly START UP 6 Cycle the thermostat OFF and ON a few times at a rate of not more than once every thirty 30 seconds Check both the control operation and the burner operating conditions MANIFOLD PRESSURE 1 Connect a manometer to the pressure tap at the outlet side of the unit s gas valve Read the manifold pressure with the main burners firing 2 If the manifold pressure reading does not match the value indicated on the unit nameplate the unit pressure regulator must be adjusted as follows a Remove the cover screw on the gas regulator located on the front side of the units gas valve b Turn the adjusting screw clockwise to increase manifold pressure or counterclockwise to decrease manifold pres sure 3 Check the temperature rise during furnace operation to insure that it falls within the range specified on the unit nameplate 4 If the temperature rise noted is outside of the specified limits adjust the indoor air flow to cause the temperature rise of the heat exchanger to fall within
44. n the drip lip on the perimeter of the unit See Figure 7 insert B A tap or jerk to the lug will overcome the interference that arises due to the nipple on the lug 3 Before hoisting the unit be sure that the proper method of rigging is used with straps or slings and spreader bars for protection during lifting Always test lift the unit to determine the exact unit balance and stability before hoisting it to the installa tion location IMPORTANT Do not lift the unit without test lifting for balance and rigging Do not lift the unit in windy conditions or above personnel Do not lift the unit by attaching a clivus hooks pins or bolts to the unit casing casing hardware corner lugs angles tabs or flanges Failure to observe these warnings may result in equipment damage When the curb and air ducts have been properly installed the unit is ready to be hoisted to the roof and set in position IMPORTANT Spreader Bars must be used when hoist ing the unit IMPORTANT The unit must be lowered into position The P V C rubber tape on the curb flange permits the unit to be repositioned if required without destroying the P V C rub ber seals affixed to the mounting curb OUTDOOR COIL END OF UNIT BAYLIFT002A LIFTING LUGS GASKET SEAL NOTE THE INNER PERIMETER OF THE DRIP LIP ON ALL UNITS SHOULD BE FLUSH WITH THE OUTER PERIMETER OF THE CURB ON THE TWO SIDES SHOWN HERE SEE FIGURE 2 FOR THE LOCATION OF THE
45. nditioner is originally affixed and applies to products purchased and retained for use within the U S A and Canada There is no warranty against corrosion erosion or deterioration If any part of your Combination Gas Electric Air Conditioner fails because of a manufacturing defect within one year from the date of the original purchase Warrantor will furnish without charge the required replacement part In addition if the sealed motor compressor fails because of a manufacturing defect within the second through fifth year from the date of original purchase Warrantor will furnish without charge the required replacement compressor In addition if the steel heat exchanger fails because of a manufacturing defect within the second through fifth year from the date of original purchase Warrantor will furnish without charge a replacement heat exchanger Warrantor s obligations and liabilities under this warranty are limited to furnishing F O B Warrantor factory or warehouse at Warrantor designated shipping point freight allowed to Buyer s city replacement parts for Warrantor s products covered under this warranty Warrantor shall not be obligated to pay for the cost of lost refrigerant No liability shall attach to Warrantor until products have been paid for and then liability shall be limited solely to the purchase price of the equipment under warranty shown to be defective THE WARRANTY AND LIABILITY SET FORTH HEREIN ARE IN LIEU OF ALL OTHER
46. nergize CC 1 lowcompressor contactor and the outdoor fan relay for low speed and indoor fan for low speed The status light is flashing and the Y1 light is on 2nd stage satisfied 1st stage still called YCZ050 ONLY The Y2 thermostat contact opens to the control board The board will de energize CC2 second compressor contactor and ener gize the outdoor fan relay for low speed and indoor fan for low speed The status light is flashing and the Y1 light is on ICM FAN MOTOR ADJUSTMENTS If the airflow needs to be increased or decreased see the Indoor Blower Performance Table below Information on changing the dip switch settings for speed control of the blower motor is in this table Blower speed changes are made on the ICM Fan Control mounted in the control box The ICM Fan Control controls the variable speed motor There is a bank of 8 dip switches See Figure below located at the lower right side of the board The dip switches work in pairs to select the cooling heat airflow CFM TON and Fan off delay options INDOOR BLOWER TIMING The ICM Fan Control controls the variable speed indoor blower The FAN OFF period is set on the ICM Fan Control board by dip switches 5 and 6 FAN CONTROL SELECTION DIP LIGHT SWITCHES a 21C800796P0 IH CNT03600 CH S g g 2 CFM FAN Y YLO 2
47. ng the unit 7 Complete the installation according to the instructions in the following sections of this manual 3 Secure the ducts to the roof TYPICAL ROOFTOP APPLICATION WITH FRAME YCZ036 050 060F RETURN AIR SUPPLY AIR WEATHER PROOF DUCT ROOF FLASHING ANGLE IRON FRAME TYPICAL ROOFTOP APPLICATION WITH FRAME YCZ036 060F MODELS WEATHER PROOF DUCT ROOF FLASHING K SUPPLY AIR ROOF FLASHING 5 RETURN AIR f ANGLE IRON J FRAME Page 10 GROUND LEVEL HORIZONTAL UNITS For ground level installations the unit should be positioned on a pad the size of the unit or larger The unit must be level on the pad The pad must not come in contact with the structure See Figure 11 Be sure the outdoor portion of the supply and return air ducts are as short as possible Proceed with the installation as follows 1 Place the unit on the pad and the five 5 rubber isolators provided INSTALLATION 2 Attach the supply and return air ducts to the unit 3 Insulate any ductwork outside of the structure with at least 2 inches of insulation and weatherproof There must be a weather proof seal where the duct enters the structure 4 Complete the installation according to the instructions in the following sections of this manual TYPICAL GROUND LEVEL APPLICATION YCZ036 050 060F MODELS SUPPLY AIR RETURN AIR DUCT DUCT SIDING
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