McQuay Climate Control Singer. Rooftop Unit. ER, R 250 Vintage C, D. Last Manufactured: Replacement Parts List No Revision C 04/2002

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1 Replacement Parts List No Revision C 04/2002 McQuay Climate Control Singer Rooftop Unit ER, R 250 Vintage C, D Last Manufactured: 1996 To find your Daikin Applied parts distributor, call or visit

2 Contents Parts List Revision History... 3 Nomenclature Serial Number Prior to Electrical Controls Function, Schematic Symbol, Location... 5 Unit Layout & Panels... 6 Filter Flag (Option D), Firestat, Liquid Line Solenoid Valve, Suction Line Filter... 6 Refrigeration Section Compressor, HP Switch, LP Switch, Condenser Coil Fan & Motor, Condenser Pressure Switch, TXV, Drier, Hot Gas Bypass... 8 Gas Heat Section Burner Assy, Pilot & Electrode, Gas Valve, Ventor, Limit Switch, Sight Glass... 9 Heat Exchangers Gas Valves Hydronic Heat Electric Heat Section Economizer Components (Options G & X) Power Exhaust Blower (Option 6) VAV (Option 9) Tracking Damper (Option T) Power Return Blower (Option 7) Controls Compressor Contactor, Blower Motor Contactor, Terminal Blocks, Fan Motor Capacitors, Transformer, Guard-A-Matic, Relay, Unit Fuses... 19, 20 Daikin Applied, Industrial Park Blvd., P.O. Box 1551, Minneapolis, MN (763) Rooftop Unit; ER,R 250 Vintages C, D Rev. C 04/02 RPL / Page 2

3 Parts List Revision History Revision Date Description -- 9/1986 Last Revision from Red Bud A 3/2002 Converted to electronic format. Part numbers converted to current McQuay Style. All new drawings used. Added model number and serial number nomenclature definitions. Added Electrical controls table. Added nomenclature options to headings. Added condenser panel assembly and latch, right hand electrical panel, left hand electrical panel, top panels for condenser and blower section, corner posts, separator panel, filter access panels, blower shelf and shelf support, evaporator blower housing and cutoff plate, compressor overload module, totally- enclosed condenser motor, condenser motor mount screws and washers, compressor vibration pads, hot gas bypass components, ventor motor mount, heat exchang ers, steam coil, hot water coil, drain pan, bracket for electric heaters, power saver thermostat, economizer rainhood and clips, power exhaust assembly components, VAV assembly, VAV null switch, tracking damper and tracking damper motor/crank arm, power return blower assembly illustration, discharge air stat and sensor, morning warm up stat and time delay. Corrected or updated part numbers for return air firestat, liquid line solenoid valve and coil, suction line filter, freezestat, blower shaft key, evaporator blower bearing, evaporator motors, blower motor and fan sheaves and belts, compressor and crankcase heater, high pressure switch, oil pressure switch, filter drier, sight glass, condenser fan blade, condenser fan motor, condenser pressure switches, expansion valve, pilot and electrode assy (vintage D units), ignition controls, fan limit control (vintage D units), ventor blower housing, electric heat contactors and fuses, power return components, 460V 500VA and 300VA transformers, control transformer, compressor contactor, condenser fan motor contactor, blower motor contactors, guard-a-matic, condenser fan relay, blower motor overload relays and heaters, blower motor fuses, control fuses. B 4/2002 Page 16 - Power Exhaust Blower diagram: bub #99 was corrected to #98. C 4/2002 Page 8 - Condenser Fan Motor was incorrectly stated as 1/3hp and is now 1-1/2hp. Page 18 - Blower Motor is incorrect, it is now 5hp and the correct pn is Page 20 - Bub. #38 is corrected to read quantity of 3. Daikin Applied, Industrial Park Blvd., P.O. Box 1551, Minneapolis, MN (763) Rooftop Unit; ER,R 250 Vintages C, D Rev. C 04/02 RPL / Page 3

4 Nomenclature Model R= Rooftop Unit Capacity 250= 25 Ton Vintage C, or D Voltage 0= 208/230/60/3 1= 460/60/3 Heating Section Natural Gas N38= 375 mbh input N40= 400 mbh input N50= 500 mbh input Propane P38= 375 mbh input P40= 400 mbh input P50= 500 mbh input Hydronic Heat H2W= 2-Row Hot Water H1S= 1-Row Steam H2S= 2-Row Steam Electric Heat 020= 20 KW 027= 27 KW 040= 40 KW 047= 47 KW 060= 60 KW 080= 80 KW 100= 100 KW 120= 120 KW 140= 140 KW 160= 160 KW Cooling Only 000= Cooling Only Model Number R 250 C 1 N40 1 Options 1= Standard Motor 2= Oversize Motor 6= Power Exhaust 7= Power Return Air Blower 8= Suction Line Filter & Pumpdown cycle 9= VAV B= D.S. Switch D= Filter Flag E= Failure Relay Package G= Horiz. Disch. Economizer R= Power Saver T= Tracking Return Air Damper X= Economizer w/spring Return Motor Serial Number (Prior to 1988) 10 Digit Number M 15 4 Digit Number Year Manufactured A= 1974 H= 1981 B= 1975 J= 1982 C= 1976 K= 1983 D= 1977 L= 1984 E= 1978 M= 1985 F= 1979 N= 1986 G= 1980 P= 1987 R= 1988 Week of Manufacture Serial Number (1988 and Later) R Plant Identification R= Red Bud, IL Year Manufactured 88= = = 1990 etc. Sequence Week of Manufacture Rooftop Unit; ER,R 250 Vintages C, D Rev. C 04/02 RPL / Page 4

5 Electrical Controls Function, Schematic Symbol, Location SS Part Description/ Function Location CPS1-6 Condenser Pressure Switch Condenser Section on Liquid Line GDM Compr. Lockout (Guard a matic) Control Box HP High Pressure Control Compressor Discharge Line LP Low Pressure Control Compressor Suction Line OP Oil Pressure Control On Compressor US Compressor Unloader On Compressor SM Compressor Motor Protector Compressor (integral to compressor) LSV Liquid Line Solenoid Valve Condenser Section CLSV Coil- Liquid Line Solenoid Valve Condenser Section HGBV Hot Gas Bypass Valve Condenser Section SSC Discharge Air Controller- W7100 Control Box DAS Discharge Air Sensor Control Box TE Enthalpy Control Downstream Side of Fresh Air damper MB Mercury Switch Return Air Damper Linkage FIL Filter Flag Economizer Filter Section FZ Freezestat Downstream Side of Evap. Coil HT3 Firestat Next to Filter Flag HT1,2 High Temp Limit Switch Electric Heat Panel HTL High Temp. Limit- Gas Heat Above Heater HT1 High Temp. Limit- Electric Heat Above Heater RX Relay- Power Exhaust Motor Power Exhaust RD Relay- Damper Economizer Rooftop Unit; ER,R 250 Vintages C, D Rev. C 04/02 RPL / Page 5

6 Unit Layout & Panels I H C L B D G J K A Part Number A Panel- Condenser Panel (with latch & hinge) Door only Latch only B Panel- Electrical, Right C Panel- Electrical, Left D Top Panel- Blower Section G Top Panel- Condenser Section H Corner Post- Access End I Corner Post- Opposite End J Corner Post- Access End K Corner Post- Opposite End L Panel- Separater N/S Filter Access Panel- Upper N/S Filter Access Panel- Lower Filter Flag (Option D), Firestat, Liquid Line Solenoid Valve, Suction Line Filter N/S Filter Flag N/S Firestat 180 Supply Air- Honeywell L4097B Return Air- Honeywell L4029E N/S Solenoid Valve- Liquid Line N/S Coil, Solenoid Valve- Liquid Line N/S Suction Line Filter This part has been discontinued since There is no replacement, but it is okay for the unit to run without this stat. Rooftop Unit; ER,R 250 Vintages C, D Rev. C 04/02 RPL / Page 6

7 Evaporator Coil and Blower Components Diagram 20 17B 17A 17 67A N/S Freezestat- Ranco N/S Evaporator Coil Blower Wheel- 7.5 & 10 HP Motor Blower Wheel- 15 HP Motor A Blower Housing B Cutoff Plate Shaft Key, Blower Shaft- Woodruff Bearing Evaporator Motor Standard Motor (Option Code= 1) 7.5 HP Oversize Motor (Option Code= 2) 10.0 HP Double Oversize Motor (Option Code= 3) 15.0 HP Motor Sheave, 2VP71 X 1-3/8"- 7.5 HP (post sn J44) Motor Sheave, 2VP62 X 1-3/8" HP Motor Motor Sheave, 3MVP55B69 X 1-5/8" HP Blower Sheave, 2BK130 X 1-7/16" HP Motor Blower Sheave, 2BK100 X 1-7/16" HP Motor Blower Sheave, 3TB HP Motor Bushing- Blower Sheave, Q1 X 1-7/16" HP Motor Belt- Units built before serial number J & 7.5 HP Motor, BP-71 (Matched Pair) HP Motor, BP-75 (Matched set of 3) Belt- Units built serial number J44 and later 7.5 HP Motor, BP-73 (Matched Pair) HP Motor, B67 (Matched Pair) HP Motor BP-71 (Matched set of 3) Blower Shelf A Support- Blower Shelf This sheave was used on units built before serial number J44 with 7.5 HP motors. 2 This sheave was used on units built before serial number J44 with 10.0 HP motors. Rooftop Unit; ER,R 250 Vintages C, D Rev. C 04/02 RPL / Page 7

8 Refrigeration Section Compressor, HP Switch, LP Switch,Condenser Coil Fan & Motor, Condenser Pressure Switch, TXV, Drier, Hot Gas Bypass Compressor Compartment G 1A Condenser Fan Detail G Top Condenser Panel Compr.- 208/230/460/3- Copeland 4RR TSK A Overload Module- Compressor TI# 15AA1600C Crankcase Heater N/S Low Pressure Switch- TI # 20PS106FA040K010D High Pressure Switch- TI # 20PS037MB425K30K Oil Pressure Switch Filter Drier- Liquid Line Sight Glass Condenser Fan Blade Condenser Fan Motor- 1-1/2 HP Open Drip- Proof Totally Enclosed Fan Guard Mount- Motor Rainshield- 5/8" bore X 6-3/4" Pressure Switch- Condenser Adjustable (pre serial number L07) P PSI (serial number L07 and later) PSI (serial number L07 and later) PSI (serial number L07 and later) Expansion Valve- PVE-11GA Condenser Coil Vibration Pad Vibration Pad Bolt- Condenser Mounting Washer- Condenser Mounting N/S Hot Gas Bypass Valve N/S Hot Gas Bypass Solenoid Valve N/S Coil- HGBP Solenoid N/S Side Inlet Connector- Distributor to TXV Rooftop Unit; ER,R 250 Vintages C, D Rev. C 04/02 RPL / Page 8

9 Gas Heat Section Burner Assy, Pilot & Electrode, Gas Valve, Ventor, Limit Switch, Sight Glass 59 59A Burner- Vintage C Units Burner- Vintage D Units 400,000 btu furnace Burner- Vintage D Units 500,000 btu furnace N/S Burner Orifice- Vintage C Units N38-375,000 btu Natural Gas # N50-500,000 btu Natural Gas # P38-375,000 btu Propane # P50-500,000 btu Propane # Burner Orifice- Vintage D Units N40-400,000 btu Natural Gas # N50-500,000 btu Natural Gas # P40-400,000 btu Propane # P50-500,000 btu Propane # N/S Spring- Burner (**quantity= 1 per burner**) ** Pilot & Electrode Assy (includes ignition cable)- Natural Gas Vintage C Units- White Rogers 21D Vintage D Units- White Rogers N/S Pilot Orifice- Vintage C Units- White Rogers A Pilot Orifice- Nat. Gas Vint. D Units- White Rogers F Pilot Orifice- Propane Vint. D Units- White Rogers F Ignition Control- Vintage C Units- White Rogers Ignition Control- Vintage D Units- White Rogers Limit Switch- Blower Compartment- TOD 60TX11-L Fan Limit Control- 130 Vintage C Units- TOD 40TC Fan Limit Control- Vintage D Units- Honeywell L Ventor Wheel- Vintage C Units Ventor Wheel- Vintage D Units Ventor Motor- 1/10 HP- Fasco A Motor Mount A Ventor Blower Housing- Vintage C Units Ventor Blower Housing- Vintage D Units N/S Gas Valve- see charts on next page N/S Heat Exchanger- see chart on next page Rooftop Unit; ER,R 250 Vintages C, D Rev. C 04/02 RPL / Page 9

10 Gas Heat Section Heat Exchangers N/S Heat Exchanger Vintage C- 10 Cell Vintage D 8 Cell- N40, P40-400,000 btu furnace Cell- N50, P50-500,000 btu furnace Gas Valves- Natural Gas Units N/S Vintages C- White Rogers 36C Vintage D- White Rogers 36C Gas Valves- Propane Units N/S Vintage C- White Rogers 36C Vintage D- White Rogers 36C Hydronic Heat N/S 2- Row Steam Coil N/S 2- Row Hot Water Coil N/S Drain Pan Rooftop Unit; ER,R 250 Vintages C, D Rev. C 04/02 RPL / Page 10

11 Electric Heat Section 20 KW Electric Heat- 208/230 Volt N/S Element KW N/S Bracket for Heater N/S Limit Switch (ELE Plate)- 71F14-L N/S Limit Switch- Auto (ELE Plate) TOD60TX N/S Fuse Block- 3 Pole, 60A, 250V N/S Fuse- 60A, 250V- FRN N/S Contactor- 3 Pole, 40A, 240V N/S Relay- SPDT- RBM KW Electric Heat- 460 Volt N/S Element KW N/S Bracket for Heater N/S Limit Switch (ELE Plate)- 71F14-L N/S Limit Switch- Auto (ELE Plate) TOD60TX N/S Fuse Block- 3 Pole, 30A, 600V N/S Fuse- 30A, 600V- Limitron 30A N/S Contactor- 3 Pole, 25A, 240V or 40 KW Electric Heat- 208/230 Volt N/S Element KW N/S Bracket for Heater N/S Limit Switch (ELE Plate)- 71F14-L N/S Limit Switch- Auto (ELE Plate) TOD60TX N/S Fuse Block- 3 Pole, 60A, 250V N/S Fuse- 60A, 250V- FRN N/S Contactor- 3 Pole, 40A, 240V or 40 KW Electric Heat- 460 Volt N/S Element KW N/S Bracket for Heater N/S Limit Switch (ELE Plate)- 71F14-L N/S Limit Switch- Auto (ELE Plate) TOD60TX N/S Fuse Block- 3 Pole, 30A, 600V N/S Fuse- 30A, 600V- Limitron 30A N/S Contactor- 3 Pole, 25A, 240V Rooftop Unit; ER,R 250 Vintages C, D Rev. C 04/02 RPL / Page 11

12 Electric Heat Section 47 or 60 KW Electric Heat- 208/230 Volt N/S Element KW N/S Bracket for Heater N/S Limit Switch (ELE Plate)- 71F14-L N/S Limit Switch- Auto (ELE Plate) TOD60TX N/S Fuse Block- 3 Pole, 60A, 250V N/S Fuse- 60A, 250V- FRN N/S Contactor- 3 Pole, 40A, 240V or 60 KW Electric Heat- 460 Volt N/S Element KW N/S Bracket for Heater N/S Limit Switch (ELE Plate)- 71F14-L N/S Limit Switch- Auto (ELE Plate) TOD60TX N/S Fuse Block- 3 Pole, 30A, 600V N/S Fuse Block- 3 Pole, 60A, 600V N/S Fuse- 30A, 600V- JKS N/S Fuse- 60A, 600V- JKS N/S Contactor- 3 Pole, 25A, 240V N/S Contactor- 3 Pole, 40A, 240V KW Electric Heat- 208/230 Volt N/S Element KW N/S Bracket for Heater N/S Limit Switch (ELE Plate)- 71F14-L N/S Limit Switch- Auto (ELE Plate) TOD60TX N/S Fuse Block- 3 Pole, 60A, 250V N/S Fuse- 60A, 250V- FRN N/S Contactor- 3 Pole, 40A, 240V Rooftop Unit; ER,R 250 Vintages C, D Rev. C 04/02 RPL / Page 12

13 Electric Heat Section 80 KW Electric Heat- 460 Volt N/S Element KW N/S Bracket for Heater N/S Limit Switch (ELE Plate)- 71F14-L N/S Limit Switch- Auto (ELE Plate) TOD60TX N/S Fuse Block- 3 Pole, 60A, 600V N/S Fuse- 60A JKS N/S Contactor- 3 Pole, 40A, 240V KW Electric Heat- 208/230 Volt N/S Element KW N/S Bracket for Heater N/S Limit Switch (ELE Plate)- 71F14-L N/S Limit Switch- Auto (ELE Plate) TOD60TX N/S Fuse Block- 3 Pole, 60A, 250V N/S Fuse- 60A, 250V- FRN N/S Contactor- 3 Pole, 40A, 240V KW Electric Heat- 460 Volt N/S Element KW N/S Bracket for Heater N/S Limit Switch (ELE Plate)- 71F14-L N/S Limit Switch- Auto (ELE Plate) TOD60TX N/S Fuse Block- 3 Pole, 30A, 600V N/S Fuse Block- 3 Pole, 60A, 600V N/S Fuse- 30A, 600V- JKS N/S Fuse- 60A, 600V- JKS N/S Contactor- 3 Pole, 25A, 240V N/S Contactor- 3 Pole, 40A, 240V Rooftop Unit; ER,R 250 Vintages C, D Rev. C 04/02 RPL / Page 13

14 Electric Heat Section 120 KW Electric Heat- 460 Volt N/S Element KW N/S Bracket for Heater N/S Limit Switch (ELE Plate)- 71F14-L N/S Limit Switch- Auto (ELE Plate) TOD60TX N/S Fuse Block- 3 Pole, 60A, 600V N/S Fuse- 60A JKS N/S Contactor- 3 Pole, 40A, 240V KW Electric Heat- 460 Volt N/S Element KW N/S Bracket for Heater N/S Limit Switch (ELE Plate)- 71F14-L N/S Limit Switch- Auto (ELE Plate) TOD60TX N/S Fuse Block- 3 Pole, 30A, 600V N/S Fuse Block- 3 Pole, 60A, 600V N/S Fuse- 30A, 600V- JKS N/S Fuse- 60A, 600V- JKS N/S Contactor- 3 Pole, 25A, 240V N/S Contactor- 3 Pole, 40A, 240V KW Electric Heat- 460 Volt N/S Element KW N/S Bracket for Heater N/S Limit Switch (ELE Plate)- 71F14-L N/S Limit Switch- Auto (ELE Plate) TOD60TX N/S Fuse Block- 3 Pole, 60A, 600V N/S Fuse- 60A JKS N/S Contactor- 3 Pole, 40A, 240V Rooftop Unit; ER,R 250 Vintages C, D Rev. C 04/02 RPL / Page 14

15 Economizer Components (Options G & X) Mercury Switch for Power Exhaust (see next page) 70 70A See Blower Components Manuf./Number 70 Damper Motor- Standard Honeywell W889E Damper Motor- Spring Return 1 Honeywell W899G Damper Motor- Spring Return 1 White Rogers A Crank Arm for Honeywell Motor A Crank Arm for White Rogers Motor Gravity Damper Filter- Permanent 12" X 48" X 1" Channel- Filter Retaining Angle- Filter N/S Enthalpy Control Honeywell H205A N/S RD Damper Relay RBM N/S Economizer Rain Hood N/S Clips- Economizer Rain Hood When replacing a Honeywell Motor with a White Rogers Motor, the crank arm must also be replaced. The Spring Motor is used on units with option "X" (see nomenclature page). Rooftop Unit; ER,R 250 Vintages C, D Rev. C 04/02 RPL / Page 15

16 Power Exhaust Blower (Option 6) Blower Panel Blower Housing Hanger, Blower- Right Hand Hanger, Blower- Left Hand Support Bracket- Bearing Fan Wheel Cut Off Plate Bearing- 1" Fan Shaft Support Assy- Right Hand Support Assy- Left Hand Motor- 3 HP Mounting Plate- Motor Key- Shaft Motor Sheave- 1VM50 X 7/8" Fan Sheave- AK74 X 1" Belt N/S Mercury Switch N/S Exhaust Hood Rooftop Unit; ER,R 250 Vintages C, D Rev. C 04/02 RPL / Page 16

17 VAV (Option 9) Tracking Damper (Option T) Discharge Damper for VAV Units (Damper installed in supply air duct) Tracking Damper Option (Damper installed in return air duct) 100 VAV Assembly (Option 9) Differential Pressure Switch (Null Switch) Damper Motor Crank Arm Tracking Damper (Option T) Crank Arm Damper Motor Transformer- Damper Motor Cleveland Pressure Switch Pressure Switch Sensor- Indoor Static Pressure Tip Sensor- Outdoor Rooftop Unit; ER,R 250 Vintages C, D Rev. C 04/02 RPL / Page 17

18 Power Return Blower (Option 7) 8 8A 10 10A Blower Cone Blower Wheel Bearing- Pillow Block Shaft A Key Blower Pulley- BK130H A Bushing for Blower Pulley- Type H 1-3/ N/S Blower Motor- 5 HP N/S Motor Pulley- 2VP56 X 7/8" N/S Belt- Matched Pair N/S Contactor- Blower Motor N/S Rainhood Rooftop Unit; ER,R 250 Vintages C, D Rev. C 04/02 RPL / Page 18

19 Controls Compressor Contactor, Blower Motor Contactor, Terminal Blocks, Fan Motor Capacitors, Transformer, Guard-A-Matic, Relay, Unit Fuses Diagram A *Quantity Varies 34* Rooftop Unit; ER,R 250 Vintages C, D Rev. C 04/02 RPL / Page 19

20 Controls Compressor Contactor, Blower Motor Contactor, Terminal Blocks, Fan Motor Capacitors, Transformer, Guard-A-Matic, Relay, Unit Fuses Components Qty. Unit Voltage 208/ Transformer, V- Gas Heat Units- 1000VA 1 N/A Transformer, V- Electric Heat Units- 500VA 1 N/A Transformer, V- Cooling Only Units- 300VA 1 N/A Transformer, V Contactor- Compressor Contactor- Condenser Fan Motor Contactor- Blower Motor 7.5 HP Standard Motor HP Oversize Motor HP Double Oversize Motor Guard-A-Matic Timer 5 minutes Relay- Condenser Fan Essex Relay- 24 V SPDT- Cooling Only- RBM Relay- 24 V SPDT- Gas Heat- RBM Relay- 24 V DPDT- Gas Heat- RBM Overload Relay- Evaporator Blower Motor 7.5 HP Standard Motor HP & 15.0 HP Oversize & Double Oversize Motor Heater- Evap. Blower Overload Relay 7.5 HP Standard Motor HP Oversize Motor HP Double Oversize Motor Fuse Block- Blower Motor- 7.5 HP & 10.0 HP Motor Fuse Block- Blower Motor HP Motor Fuse- Blower Motor- 7.5 HP & 10.0 HP Motor Fuse- Blower Motor HP Motor Fuse Block- Control Units built before serial number L Units built after serial number L Fuse- Control Elect. Heat, Cooling Only Units- Pre L Gas Heat Units- Post Serial Number L Elect. Heat, Cooling Only Units- Post L Fuse Holder- Control Gas Heat Units Electric Heat, Cooling Only Units Fuse Type 6 MQ- Control Gas Heat Units Electric Heat, Cooling Only Units Fuse Block- Condenser Fan Fuse- Condenser Fan Terminal Block A Terminal Strip- 10 Pole Terminal Strip- 5 Pole Ground Lug N/S Discharge Air Stat- Honeywell W7100C N/S Sensor for Discharge Air Stat- Honeywell C7100A N/S Failure Relay Package (Option E) Terminal Strip- 6 Pole Relay- 24V SPDT RBM Relay- 240V SPDT RBM Relay RBM N/S Morning Warm Up Stat- Honeywell T678A N/S Morning Warm Up Time Delay THD/A 4160M SSAC 120V N/A= Not applicable Rooftop Unit; ER,R 250 Vintages C, D Rev. C 04/02 RPL / Page 20