Wiring Diagrams
Transcription
Wiring Diagrams
42BH,BV,CA,CE,CF,CG,CK,DA,DC,DD, DE,DF,SG,SH,SJ,VA,VB,VC,VE,VF,VG Fan Coil Air Conditioners Wiring Diagrams INDEX SYSTEM TYPE THERMOSTAT Transformer and Non-Carrier Relay Board (24-v) (Special Request) ---------- Field-Supplied/Installed Controls (Line Voltage and Control Valves) ---------- UNITS DIAGRAM NUMBER FIGURE NUMBER 2-Pipe Cooling Only Unit-Mounted Debonair® Thermostat (24-v) and Duct Sensor Unit-Mounted Thermostat (Line Voltage) Remote/Wall-Mounted Debonair Thermostat (24-v) Remote/Wall-Mounted Thermostat (Line Voltage) 42C,S,V (except VG), and 42D 1000-90000522 (600-1000 cfm) 42C,S,V and 42D 1000-90000493 (600-1000 cfm) 42D (1200-2000) 1000-90000514 33CSSN2-FC 42SG,SH,SJ,VA,VB,VF 1000-00007884 33CSSP2-FC* C17 42SG,SH,SJ,VA,VB,VC,VE,VF 1000-90000530 42C,S,V (except VG), and 42D 71360601 33CSSN2-FC (600-1000 cfm) 33CSSP2-FC* 42D (1200-2000) 1000-00005664 42C,S,V and 42D 71171701 TB155-026 (600-1000 cfm) (702893-36) 42D (1200-2000) 71171704 1 2 3 4 5 6 7 8 9 2-Pipe Heating Only Transformer and Non-Carrier Relay Board (24-v) (Special Request) ---------- Field-Supplied/Installed Controls (Line Voltage and Control Valves) ---------- Unit-Mounted Debonair Thermostat (24-v) and Duct Sensor Unit-Mounted Thermostat (Line Voltage) Remote/Wall-Mounted Debonair Thermostat (24-v) Remote/Wall-Mounted Thermostat (Line Voltage) 42C,S,V (except VG), and 42D 1000-90000522 (600-1000 cfm) 42C,S,V and 42D 1000-90000493 (600-1000 cfm) 42D (1200-2000) 1000-90000514 33CSSN2-FC 42SG,SH,SJ,VA,VB,VF 71359301 33CSSP2-FC* C17 42SG,SH,SJ,VA,VB,VC,VE,VF 1000-90000530 42C,S,V (except VG), and 42D 71360501 33CSSN2-FC (600-1000 cfm) 33CSSP2-FC* 42D (1200-2000) 1000-00005664 42C,S,V and 42D 71171801 TB155-026 (600-1000 cfm) (702893-36) 42D (1200-2000) 71171704 10 11 12 13 14 15 16 17 18 2-Pipe Heating and Cooling with Automatic Changeover Transformer, Non-Carrier Relay Board (24-v) (Special Request) ---------- Field-Supplied/Installed Controls (Line Voltage and Control Valves) ---------- Unit-Mounted Debonair Thermostat (24-v), Duct Sensor Unit-Mounted Thermostat (Line Voltage) Remote/Wall-Mounted Debonair Thermostat (24-v) Remote/Wall-Mounted Thermostat (Line Voltage) 42C,S,V (except VG), and 42D 1000-90000519 (600-1000 cfm) 42C,S,V and 42D 1000-90000507 (600-1000 cfm) 42D (1200-2000) 1000-90000511 33CSSN2-FC 42SG,SH,SJ,VA,VB,VF 33CSSP2-FC* C17 42SG,SH,SJ,VA,VB,VC,VE,VF 42C,S,V (except VG), and 42D 33CSSN2-FC (600-1000 cfm) 33CSSP2-FC* 42D (1200-2000) 42C,S,V and 42D TB155-026 (600-1000 cfm) (702893-36) 42D (1200-2000) 19 20 21 1000-00007360 22 1000-90000527 23 1000-00005377 24 1000-00012276 25 71171501 26 71171503 27 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-56420002-01 Printed in U.S.A. Form 42-3W Pg 1 10-08 Replaces: 42-2W INDEX (cont) SYSTEM TYPE THERMOSTAT UNITS DIAGRAM NUMBER FIGURE NUMBER 2-Pipe Heating and Cooling with Auxiliary Heat Transformer and Non-Carrier Relay Board (24-v) (Special Request) ---------- Field-Supplied/Installed Controls (Line Voltage and Control Valves or Electric Heat) ---------- Unit-Mounted Thermostat (Line Voltage) Unit-Mounted Debonair® Thermostat (24-v), Duct Sensor and Dual Power Source Unit-Mounted Thermostat (Line Voltage) and Dual Power Source Remote/Wall-Mounted Debonair Thermostat (24-v) Remote/Wall-Mounted Debonair Thermostat (24-v) and Dual Power Source Remote/Wall-Mounted Thermostat (Line Voltage) and Dual Power Source 42C,S,V (except VG), and 42D 1000-90000520 (600-1000 cfm) 42C,S,V (except VG), and 42D 1000-90000508 (600-1000 cfm) 42D (1200-2000) 1000-90000512 C17 42SG,SH,SJ,VA,VB,VC,VE,VF 1000-90000528 33CSSN2-FC 42SG,SH,SJ,VA,VB,VC,VE,VF 71359601 33CSSP2-FC* C17 42SG,SH,SJ,VA,VB,VC,VE,VF 70391617 42C,S,V (except VG), and 42D 1000-00006449 33CSSN2-FC (600-1000 cfm) 33CSSP2-FC* 42D (1200-2000) 1000-00046974 42C,S,V (except VG), and 42D 71360801 33CSSN2-FC (600-1000 cfm) 33CSSP2-FC* 42D (1200-2000) 71360803 42C,S,V (except VG), and 42D 71171301 TB155-026 (600-1000 cfm) (702893-36) 42D (1200-2000) 71171313 28 29 30 31 32 33 34 35 36 37 38 39 2-Pipe Cooling with Total Electric Heat Transformer and Non-Carrier Relay Board (24-v) (Special Request) ---------- Field-Supplied/Installed Controls (Line Voltage and Control Valves or Electric Heat) ---------- Unit-Mounted Debonair Thermostat (24-v) and Duct Sensor Unit-Mounted Thermostat (Line Voltage) Unit-Mounted Debonair Thermostat (24-v), Duct Sensor and Dual Power Source Unit-Mounted Thermostat (Line Voltage) and Dual Power Source Remote/Wall-Mounted Debonair Thermostat (24-v) Remote/Wall-Mounted Thermostat (Line Voltage) Remote/Wall-Mounted Debonair Thermostat (24-v) and Dual Power Source Remote/Wall-Mounted Thermostat (Line Voltage) and Dual Power Source 33CSSN2-FC 33CSSP2-FC* C17 33CSSN2-FC 33CSSP2-FC* C17 33CSSN2-FC 33CSSP2-FC* TB155-026 (702893-36) 42C,S,V (except VG), and 42D 1000-90000523 (600-1000 cfm) 42C,S,V (except VG), and 42D 1000-90000490 (600-1000 cfm) 42D (1200-2000) 1000-90000515 42 42SG,SH,SJ,VA,VB,VC,VE,VF 1000-00017766 43 42SG,SH,SJ,VA,VB,VC,VE,VF 1000-90000531 44 42SG,SH,SJ,VA,VB,VC,VE,VF 45 71359701 40 41 42SG,SH,SJ,VA,VB,VC,VE,VF 70390705 46 42D (1200-2000) 1000-00005329 47 71171106 48 71360901 49 42C,S,V (except VG), and 42D (600-1000 cfm) 42C,S,V (except VG), and 42D 33CSSN2-FC (600-1000 cfm) 33CSSP2-FC* 42D (1200-2000) 42C,S,V (except VG), and 42D TB155-026 (600-1000 cfm) (702893-36) 42D (1200-2000) 71360903 50 71171101 51 71171114 52 4-Pipe Heating and Cooling Transformer and Non-Carrier Relay Board (24-v) (Special Request) ---------- Field-Supplied/Installed Controls (Line Voltage and Control Valves) ---------- Unit-Mounted Debonair Thermostat (24-v) and Duct Sensor Unit-Mounted Thermostat (Line Voltage) Remote/Wall-Mounted Debonair Thermostat (24-v) Remote/Wall-Mounted Thermostat (Line Voltage) 42C,S,V (except VG), and 42D 1000-90000526 (600-1000 cfm) 42C,S,V (except VG), and 42D 1000-90000510 (600-1000 cfm) 42D (1200-2000) 1000-90000518 33CSSN2-FC 42SG,SH,SJ,VA,VB,VC,VE,VF 1000-00005390 33CSSP2-FC* C17 42SG,SH,SJ,VA,VB,VC,VE,VF 1000-90000534 42C,S,V (except VG), and 42D 71361001 33CSSN2-FC (600-1000 cfm) 33CSSP2-FC* 42D (1200-2000) 1000-00010427 42C,S,V (except VG), and 42D 71170901 TB155-026 (600-1000 cfm) (702893-36) 42D (1200-2000) 71170903 2 53 54 55 56 57 58 59 60 61 INDEX (cont) SYSTEM TYPE THERMOSTAT UNITS DIAGRAM NUMBER FIGURE NUMBER No Controls Unit-Mounted 3-Speed Switch Only ---------- Wall-Mounted 3-Speed Switch Only ---------- Single-Phase Unit ---------- 42B 1000-90000732 65 ---------- 42B 1000-90000734 66 ------------------------------------- 42B 42B 42B 42B 1000-90000748 1000-90000749 1000-90000735 1000-90000736 67 68 69 70 ---------- 42B 1000-90000737 71 ---------------------------- 42B 42B 42B 1000-90000742 1000-90000745 1000-90000747 72 73 74 T-170 T-170 T-170 42B 42B 42B 1000-00032864 1000-00032864 1000-00032864 75 76 77 ------------------- — — 85757501 85757502 78 79 3-Phase Unit Motor Controls Single-Phase Only 3-Phase Only Single-Phase with Interlocking Disconnect 3-Phase with Interlocking Disconnect Single-Phase with Interlocking Disconnect and 1-Stage Electric Heater 3-Phase with Interlocking Disconnect and 1-Stage Electric Heater 3-Phase with Interlocking Disconnect and 2-Stage Electric Heater 3-Phase with Interlocking Disconnect and 3-Stage Electric Heater Sunne T-170 Thermostat 2-Pipe Cool/Heat 2-Pipe Cooling With Electric Heat 4-Pipe Cooling and Heating Master/Slave Wiring Diagram (Special Request) Master Control Option Slave Control Option 42SG,SH,SJ,VA,VB,VC,VE,VF 1000-90000503 42C,S,V and 42D 70338901 (600-1000 cfm) 42D (1200-2000) 70338903 62 63 64 *The wiring diagrams for the 33CSSP2-FC and 33CSSN2-FC thermostats are the same; however, the 33CSSP2-FC thermostat is programmable while the 33CSSN2-FC thermostat is nonprogrammable. LEGEND (Fig. 1-79) AWG COM ELEC FLA GND LRA MTR NC NEC NO — — — — — — — — — — American Wire Gage Common Electric Full Load Amps Ground Locked Rotor Amps Motor Normally Closed National Electrical Code Normally Open Q/C RES SW TSTAT W/O XFMR XFORMER — — — — — — — Quick Connect Resistance Switch Thermostat Without Transformer Transformer Terminal (Unmarked) Terminal Block *Use WHT for 120/277 v. Use BLK for 208/240 v. NOTES: 1. Disconnect power before servicing. 2. See nameplate for correct voltage. Use 75 C minimum copper conductors only. Unit terminals are not designed to accept any other wiring. 3. Motor(s) is thermally protected. Units with 2 motors are wired parallel. 4. Provide disconnect means and overcurrent protection as required. 5. Motor shown for 120/277 v operation, for 208/240 v motor common is ORG or YEL. Splice Factory Wiring Field Wiring Optional Wiring Stripped Wire Lead Wire Connection Wire Capped 6. Valve optional, factory-supplied or field-supplied with NEC class 1 wiring. Do not exceed thermostat rating. 7. To ensure proper fan interlock and sequencing, external controller must energize heater stages in numerical order shown and deenergize stages in reverse order (first on, last off). 8. All contractor wiring must conform to national and local electrical codes. 9. Optional valve can be factory or field supplied. 3 In winter, the system is switched over to hot water and requires 2 auto changeover devices (aquastats). One device controls the switching of the thermostat, the other device locks out the electric heater when hot water is in the coil. With this system, the fan runs continuously unless manually switched to the OFF position. Fan must be on before thermostat can send signal to open chilled water valve or turn on electric heater. Two control methods are available: 1. Use of a standard automatic changeover thermostat with a deadband between heating and cooling. 2. Use of a manual changeover thermostat. Only one changeover is required with this method. A 2-way or 3-way electric valve must be included with this system. OPERATION Manual Fan Control — The standard fan-speed switch is furnished unit-mounted and wired on all vertical cabinet units. On all vertical furred-in units and all horizontal units, the switch is shipped separately on a decorative wall plate for field mounting and wiring. The standard switch has LOW, MEDIUM, HIGH and OFF positions plus an auxiliary contact to energize thermostats, valves, dampers, etc. Thermostatic Fan Control, 2-Pipe Systems — The thermostat cycles the fan on and off from any selected speed setting to maintain selected room temperature. Controls can be wired for heating-only, cooling-only or for heating/ cooling with the addition of an automatic changeover device that senses water temperature and changes the action of the thermostat as required. Thermostat 2-Pipe Total Electric Heat with Valve Control — With this system, the complete heating Thermostatic Fan Control, 2-Pipe Systems with Safety Cycle — This control is used for high requirement for the space is provided by the electric heater; the water system is never changed over for heating. It is therefore possible, just as with 4-pipe systems, to have heating or cooling at any time of the year. The fan runs continuously unless it is manually switched to the OFF position. Fan must be on before thermostat can send signal to open chilled water valve or turn on electric heater. Normally, an automatic changeover thermostat with a deadband between heating and cooling is used, but a manual changeover thermostat is also suitable. A 2-way or 3-way valve must also be used so that the chilled water is off whenever the heater is on. No changeover device to sense water temperature is necessary. humidity situations in which condensate problems can occur if fan is turned off while chilled water is still running through the coil. The wiring provides fan cycling from HIGH to LOW on the cooling cycle and from LOW to OFF on the heating cycle. An ON-OFF toggle switch replaces the standard 3-speed fan switch. The toggle switch can be concealed to ensure that the unit runs on low speed when cooling. This action greatly reduces the chance of condensation problems that exist with other standard fan cycling controls. Thermostatic Electric Valve Control, 2-Pipe — A thermostatically controlled 2-position valve provides superior control to fan cycling. With this control, the fan runs continuously unless it is manually switched to the OFF position. The fan must be on before the valve can be opened to supply water to the coil. This system can be used for normal 2-pipe changeover systems and can also be furnished for cooling-only or heatingonly applications by omitting the changeover and specifying which application is intended. Thermostatic Valve Control, 4-Pipe — The 4-pipe system provides the ultimate in economy and room temperature control. Both hot water and chilled water are available at any time. Normally an automatic changeover thermostat is used, but a manual changeover thermostat is also suitable. Two 2-way valves, two 3-way valves, or one 2-way plus one 3-way valve must be selected. An automatic changeover device to sense water temperature is not required. With this system, the fan runs continuously unless it is manually switched to the OFF position. The fan must be on before thermostat can send a signal to open the chilled water or hot water valve. Thermostatic 2-Pipe Auxiliary Electric Heat with Valve Control — This system, also called Twilight or Intermediate Season electric heat, goes a long way towards solving the spring and fall control problems of 2-pipe systems. Chilled water can be available late into the fall. It may also be turned on early in the spring and still provide heat to all units when required. 4 a42-4050 NEC CLASS 2 WIRING Fig. 1 — 42C,S, V (except VG), and 42D (600-1000 cfm) 2-Pipe Cooling Only — Transformer and Non-Carrier Relay Board (24-v) (Special Request) Δ120-V WHT ALL OTHERS BLK a42-4051 NEC CLASS 1 WIRING Fig. 2 — 42C,S,V and 42D (600-1000 cfm) 2-Pipe Cooling Only — Field-Supplied/Installed Controls (Line Voltage and Control Valves) 5 a42-4052 Δ120-V WHT ALL OTHERS BLK NEC CLASS 1 WIRING Fig. 3 — 42D (1200-2000) 2-Pipe Cooling Only — Field-Supplied/Installed Controls (Line Voltage and Control Valves) a42-4053 Fig. 4 — 42SG,SH,SJ,VA,VB,VF 2-Pipe Cooling Only — Unit-Mounted Debonair® Thermostat (24-v) and Duct Sensor 6 Δ120-V WHT ALL OTHERS BLK a42-4054 NEC CLASS 1 WIRING Fig. 5 — 42SG,SH,SJ,VA,VB,VC,VE,VF 2-Pipe Cooling Only — Unit-Mounted Thermostat (Line Voltage) TRANSFORMER Fig. 6 — 42C,S,V (except VG), and 42D (600-1000 cfm) 2-Pipe Cooling Only — Remote/Wall-Mounted Debonair® Thermostat (24-v) 7 a42-4055 Fig. 7 — 42D (1200-2000) 2-Pipe Cooling Only — Remote/Wall-Mounted Debonair® Thermostat (24-v) THERMOSTAT PART # 702893-36 PUR ORG REMOTE DEVICE BOX COOL BLU HEAT RED L1 BLK L2 OR N YEL HI W/ORG MED W/RED LOW W/BRN UNIT MOUNTED J BOX NEC CLASS 1 WIRING PUR VALVE QUICK CONNECT OPTIONAL L RED BLOWER MOTOR M BLU H BLK WHT COM 2 4 3 2 1 *WHT RED 1 BLK WHT COOL BLU BLK *WHT *WHT WHT FOR 120V L2 or N ALL OTHERS BLK L1 EQUIPMENT GROUND Fig. 8 — 42C,S,V and 42D (600-1000 cfm) 2-Pipe Cooling Only — Remote/Wall-Mounted Thermostat (Line Voltage) 8 THERMOSTAT PART # 702893-36 PUR ORG REMOTE DEVICE BOX COOL BLU HEAT RED L1 BLK L2 OR N YEL HI W/ORG MED W/RED LOW W/BRN NEC CLASS I WIRING BLK RED BLU UNIT MOUNTED J BOX BLK B NC 1 7 *WHT 0 3 *WHT 1 BLK WHT COOL 0 B NC 7 1 2 4 3 0 *WHT 3 6 8 BLU BLK 120V WHT ALL OTHERS BLK B NC BLK 1 7 6 8 EQUIPMENT GROUND NO *WHT COM 1 NO 2 COM WHT COM RED 2 H BLK 3 VALVE 2 BLK *WHT 4 MOTOR 4 6 BLOWER M BLU 1 8 WHT COM L RED 2 BLU NO H BLK 3 COM MOTOR M BLU RED 2 BLOWER 4 4 L RED VIO *WHT QUICK CONNECT *WHT L2 or N L1 Fig. 9 — 42D (1200-2000) 2-Pipe Cooling Only — Remote/Wall-Mounted Thermostat (Line Voltage) NEC CLASS 2 WIRING a42-4050 Fig. 10 — 42C,S,V (except VG), and 42D (600-1000 cfm) 2-Pipe Heating Only — Transformer and Non-Carrier Relay Board (24-v) (Special Request) 9 a42-4051 NEC CLASS 1 WIRING Fig. 11 — 42C,S,V and 42D (600-1000 cfm) 2-Pipe Heating Only — Field-Supplied/Installed Controls (Line Voltage and Control Valves) a42-4052 Δ120-V WHT ALL OTHERS BLK NEC CLASS 1 WIRING Fig. 12 — 42D (1200-2000) 2-Pipe Heating Only — Field-Supplied/Installed Controls (Line Voltage and Control Valves) 10 THERMOSTAT #33CSSN2-FC R G RED DUCT SENSOR 33CSSEN-DS RS ORG RS+5 Y1 G3 W1 G2 C H2O CK1 RED WHT YEL BLU BRN BLK BLK VALVE BLK BLK 2 Q/C 1 YEL 33ZCRLYBRD ORG YEL G G2/(W) G3/(Y) COM QUICK CONNECT FAN BLK (VALVE) (COOL) HI YEL (HEAT) YEL 24 MED RED BLU BLK RED L 4 BLU M 3 BLOWER BLK H 2 1 MOTOR WHT COM TRANSFORMER LOW EQUIPMENT GROUND BLK BLK L1 *WHT L2 or N *WHT Fig. 13 — 42SG,SH,SJ,VA,VB,VF 2-Pipe Heating Only — Unit-Mounted Debonair® Thermostat (24-v) and Duct Sensor Δ120-V WHT ALL OTHERS BLK NEC CLASS 1 WIRING a42-4054 Fig. 14 — 42SG,SH,SJ,VA,VB,VC,VE,VF 2-Pipe Heating Only — Unit-Mounted Thermostat (Line Voltage) 11 THERMOSTAT #33CSSN2-FC REMOTE DEVICE BOX RS+5 RS R G Y1 G3 W1 G2 C H2O CK1 NEC CLASS 2 WIRING YEL BLU BRN BLK RED ORG VALVE BLK HEAT BLK 2 Q/C 1 YEL 33ZCRLYBRD YEL G G2/(W) G3/(Y) COM QUICK CONNECT FAN BLK (VALVE) RED 4 BLU HI ORG YEL 24 BLU M 3 (COOL) (HEAT) RED L MED BLK *WHT 2 1 BLOWER BLK H MOTOR WHT COM TRANSFORMER EQUIPMENT GROUND L1 L2 or N LOW BLK BLK *WHT BLK *WHT Fig. 15 — 42C,S,V (except VG), and 42D (600-1000 cfm) 2-Pipe Heating Only — Remote/Wall-Mounted Debonair® Thermostat (24-v) a42-4055 NEC CLASS 2 WIRING Fig. 16 — 42D (1200-2000) 2-Pipe Heating Only — Remote/Wall-Mounted Debonair Thermostat (24-v) 12 ONLY 120V WHT/ALL OTHERS BLK Fig. 17 — 42C,S,V and 42D (600-100 cfm) 2-Pipe Heating Only — Remote/Wall-Mounted Thermostat (Line Voltage) THERMOSTAT PART # 702893-36 PUR ORG REMOTE DEVICE BOX COOL BLU HEAT RED L1 BLK L2 OR N YEL HI W/ORG MED W/RED LOW W/BRN NEC CLASS I WIRING BLK BLU RED UNIT MOUNTED J BOX BLK B NC 1 7 *WHT 0 3 2 *WHT 1 WHT COOL B NC 7 1 2 4 3 0 *WHT 0 3 6 8 BLU BLK 120V WHT ALL OTHERS BLK B NC BLK 1 7 6 8 EQUIPMENT GROUND NO *WHT COM 1 NO 2 RED COM WHT COM *WHT 2 H BLK 3 VALVE BLK BLK 4 MOTOR M BLU 4 6 BLOWER 1 8 WHT COM L RED 2 BLU NO H BLK 3 COM MOTOR M BLU RED 2 BLOWER 4 4 L RED VIO *WHT QUICK CONNECT *WHT L2 or N L1 Fig. 18 — 42D (1200-2000) 2-Pipe Heating Only — Remote/Wall-Mounted Thermostat (Line Voltage) 13 a42-4056 NEC CLASS 2 WIRING Fig. 19 — 42C,S,V (except VG), and 42D (600-1000 cfm) 2-Pipe Heating and Cooling with Automatic Changeover — Transformer, Non-Carrier Relay Board (24-v) (Special Request) Δ120-V WHT ALL OTHERS BLK a42-4057 NEC CLASS 1 WIRING Fig. 20 — 42C,S,V and 42D (600-1000) 2-Pipe Heating and Cooling with Automatic Changeover — Field-Supplied/Installed Controls (Line Voltage and Control Valves) 14 a42-4058 Δ120-V WHT ALL OTHERS BLK NEC CLASS 1 WIRING Fig. 21 — 42D (1200-2000) 2-Pipe Heating and Cooling with Automatic Changeover — Field-Supplied/Installed Controls (Line Voltage and Control Valves) a42-4059 Fig. 22 — 42SG,SH,SJ,VA,VB,VF 2-Pipe Heating and Cooling with Automatic Changeover — Unit-Mounted Debonair® Thermostat (24-v), Duct Sensor 15 Δ120-V WHT ALL OTHERS BLK NEC CLASS 1 WIRING a42-4060 Fig. 23 — 42SG,SH,SJ,VA,VB,VC,VE,VF 2-Pipe Heating and Cooling with Automatic Changeover — Unit-Mounted Thermostat (Line Voltage) a42-4061 NEC CLASS 2 WIRING Fig. 24 — 42C,S,V (except VG), and 42D (600-1000 cfm) 2-Pipe Heating and Cooling with Automatic Changeover — Remote/Wall-Mounted Debonair® Thermostat (24-v) 16 NEC CLASS 2 WIRING a42-4062 Fig. 25 — 42D (1200-2000) 2-Pipe Heating and Cooling with Automatic Changeover — Remote/Wall-Mounted Debonair® Thermostat (24-v) THERMOSTAT PART # 702893-36 PUR ORG REMOTE DEVICE BOX COOL BLU HEAT RED L1 BLK L2 OR N YEL HI W/ORG MED W/RED LOW W/BRN UNIT MOUNTED J BOX NEC CLASS 1 WIRING MOTOR M BLU H BLK WHT COM 3 2 1 RED 2 BLU 1 BLK 3 BLK RED RISE BLU AQUASTAT *WHT BLK BLOWER 4 PUR BRN L RED VALVE L2 or N *WHT 2 1 L1 BLK WHT EQUIPMENT GROUND ONLY 120V WHT/ALL OTHERS BLK Fig. 26 — 42C,S,V and 42D (600-1000) 2-Pipe Heating and Cooling with Automatic Changeover — Remote/Wall-Mounted Thermostat (Line Voltage) 17 THERMOSTAT PART # 702893-36 PUR ORG REMOTE DEVICE BOX COOL BLU HEAT RED L1 BLK L2 OR N YEL HI W/ORG MED W/RED LOW W/BRN UNIT MOUNTED J BOX ONLY 120V WHT/ALL OTHERS BLK BLK BLU RED 0 VALVE 3 1 7 6 8 *WHT BLK 1 BLK WHT *WHT BLU BLK 2 NC NO H BLK 3 RED COM MOTOR 4 3 2 BLOWER M BLU 4 L RED 2 0 3 3 1 7 BRN *WHT BLK BLU NC 6 2 8 3 NO H BLK RED COM MOTOR 4 *WHT 2 BLOWER M BLU 1 4 WHT COM L RED BLK 2 BLK 1 BLK RED RISE 0 3 2 PUR 3 NC NO COM 1 4 3 BLU 1 7 6 8 WHT COM AQUASTAT *WHT EQUIPMENT GROUND BLK L2 or N L1 Fig. 27 — 42D (1200-2000) 2-Pipe Heating and Cooling with Automatic Changeover — Remote/Wall-Mounted Thermostat (Line Voltage) NEC CLASS 2 WIRING a42-4063 Fig. 28 — 42C,S,V (except VG), and 42D (600-1000 cfm) 2-Pipe Heating and Cooling with Auxiliary Heat — Transformer and Non-Carrier Relay Board (24-v) (Special Request) 18 a42-4064 Δ120-V WHT ALL OTHERS BLK NEC CLASS 1 WIRING Fig. 29 — 42C,S,V (except VG), and 42D (600-1000 cfm) 2-Pipe Heating and Cooling with Auxiliary Heat — Field-Supplied/Installed Controls (Line Voltage and Control Valves or Electric Heat) NEC CLASS 1 WIRING a42-4065 Fig. 30 — 42D (1200-2000) 2-Pipe Heating and Cooling with Auxiliary Heat — Field-Supplied/Installed Controls (Line Voltage and Control Valves or Electric Heat) 19 a42-4066 Δ120-V WHT ALL OTHERS BLK NEC CLASS 1 WIRING Fig. 31 — 42SG,SH,SJ,VA,VB,VC,VE,VF 2-Pipe Heating and Cooling with Auxiliary Heat — Unit-Mounted Thermostat (Line Voltage) THERMOSTAT #33CSSN2-FC R G Y1 G3 BLK DUCT SENSOR 33CSSEN-DS RS PUR RS+5 W1 G2 C H2O CK1 CHANGE OVER SENSOR RED YEL BLU BRN BLK RED ORG WHT BLK BLK VALVE BLK BLK 2 Q/C 1 YEL 33 YEL RED G QUICK CONNECT FAN BLU G2/(W) BLK G3/(Y) BLK COM (VALVE) RED 4 (COOL) 3 HI ORG (HEAT) YEL 24 RED L BLU M BLU BLK *WHT MED 2 1 BLOWER BLK H MOTOR WHT COM TRANSFORMER BLK EQUIPMENT GROUND L1 L2 or N LOW WHT/RED BLK BLK *WHT *WHT BRN YEL 0 YEL 3 BLK L1 1 06 4 2 NC 7 COM8 NO LIMIT SWITCH 6 BLK N WHT BLK CONTACTOR EQUIPMENT GROUND ELEC. HEATER Fig. 32 — 42SG,SH,SJ,VA,VB,VC,VE,VF 2-Pipe Heating and Cooling with Auxiliary Heat — Unit-Mounted Debonair® Thermostat (24-v), Duct Sensor and Dual Power Source 20 Fig. 33 — 42SG,SH,SJ,VA,VB,VC,VE,VF 2-Pipe Heating and Cooling with Auxiliary Heat — Unit-Mounted Thermostat (Line Voltage) and Dual Power Source a42-4067 NEC CLASS 2 WIRING Fig. 34 — 42C,S,V (except VG), and 42D (600-1000 cfm) 2-Pipe Heating and Cooling with Auxiliary Heat — Remote/Wall-Mounted Debonair® Thermostat (24-v) 21 a42-4068 NEC CLASS 2 WIRING Fig. 35 — 42D (1200-2000) 2-Pipe Heating and Cooling with Auxiliary Heat — Remote/Wall-Mounted Debonair® Thermostat (24-v) THERMOSTAT #33CSSN2-FC REMOTE DEVICE BOX RS+5 RS R G Y1 G3 W1 G2 C H2O CK1 NEC CLASS 2 WIRING CHANGE OVER SENSOR YEL BLU BRN BLK PUR RED ORG BLK VALVE BLK BLK COOL 2 Q/C 1 BLK YEL 33ZCRLYBRD G G2/(W) G3/(Y) COM YEL QUICK CONNECT FAN BLK (VALVE) RED 4 (COOL) RED L BLU M BLU 3 HI BLOWER BLK H BLK 2 ORG (HEAT) YEL 24 *WHT MED 1 MOTOR WHT COM TRANSFORMER EQUIPMENT GROUND L1 L2 or N BLK LOW WHT/RED BLK *WHT *WHT 0 YEL 1 06 EQUIPMENT GROUND 3 BLK L1 NC 7 4 COM 8 2 NO BRN LIMIT SWITCH 6 BLK BLK WHT N ELEC. HEATER Fig. 36 — 42C,S,V (except VG), and 42D (600-1000 cfm) 2-Pipe Heating and Cooling with Auxiliary Heat — Remote/Wall-Mounted Debonair Thermostat (24-v) and Dual Power Source 22 REMOTE DEVICE BOX THERMOSTAT #33CSSN2-FC RS+5 RS R G Y1 G3 W1 G2 C H2O CK1 NEC CLASS 2 WIRING YEL BLU BRN BLK PUR RED ORG CHANGE OVER SENSOR 33ZCRLYBRD G G2/(W) G3/(Y) COM BLK BLK FAN ORG VALVE QUICK CONNECT BLK (VALVE) (COOL) HI BLK COOL 2 Q/C 1 BLK (HEAT) YEL RED 4 BLU 3 BLK 2 *WHT MED 1 RED L BLU M BLOWER BLK H MOTOR WHT COM LOW VER1.3 030700 G G2/(W) G3/(Y) COM Q/C BLK 33ZCRLYBRD FAN QUICK CONNECT BLK (VALVE) RED BLU 24 BLU (COOL) HI BLK TRANSFORMER BLK (HEAT) WHT/BRN RED/ORG EQUIP.GROUND *WHT MED 4 RED L BLU M 3 2 1 BLOWER BLK H MOTOR WHT COM *WHT LIMIT SWITCH LOW VER1.3 030700 YEL *WHT EQUIP.GROUND BLK L1 N. OR L2 BLK BLK YEL 0 1 2 4 6 8 BLK BLK L1 BLK BLK *WHT N. OR L2 CONTACTOR *WHT ELEC. HEATERS Fig. 37 — 42D (1200-2000) 2-Pipe Heating and Cooling with Auxiliary Heat — Remote/Wall-Mounted Debonair® Thermostat (24-v) and Dual Power Source THERMOSTAT PART # 702893-36 PUR ORG REMOTE DEVICE BOX COOL BLU HEAT RED L1 BLK L2 OR N YEL HI W/ORG W/RED LOW W/BRN UNIT MOUNTED J BOX AQUASTATS QUICK CONNECT OPTIONAL BLOWER BRN L RED RED M BLU BLU BLK RED H BLK MOTOR WHT COM RISE BLU PUR BLK BLK *WHT *WHT EQUIPMENT GROUND RED RED BRN BLU RED BLK *WHT WHT RISE L2 or N VALVE L1 *WHT CONTACTOR LIMIT SWITCH 1 BLK BLK BLK *WHT L1 L2 OR N GRN ONLY 120V WHT/ALL OTHERS BLK Fig. 38 — 42C,S,V (except VG), and 42D (600-1000 cfm) 2-Pipe Heating and Cooling with Auxiliary Heat — Remote/Wall-Mounted Thermostat (Line Voltage) and Dual Power Source 23 THERMOSTAT PART # 702893-36 PUR ORG REMOTE DEVICE BOX COOL BLU HEAT RED L1 BLK L2 OR N YEL HI W/ORG MED W/RED LOW W/BRN 8 H BLK 2 WHT COM L RED 1 0 4 RED 2 4 M BLU 3 6 8 BLK BLU 2 H BLK *WHT BLK 1 WHT COM *WHT L2 or N L1 EQUIPMENT GROUND L1 0 2 1 1 1 2 4 6 8 RELAY BLK 0 1 2 4 RED 3 BLU 6 8 RISE BLK 1 RED 3 BLU 2 BLK 1 WHT RISE LIMIT SWITCH BLK *WHT *WHT EQUIPMENT GROUND 1 VALVE *WHT BLK L2 or N BLK BLK 4 6 AQUASTATS 2 BLK 2 BLK BLU BLU 3 1 BRN MOTOR M BLU 3 BLK BLOWER RED BLK MOTOR 4 PUR BLOWER 0 L RED N BR BRN QUICK CONNECT OPTIONAL RED UNIT MOUNTED J BOX BLK CONTACTOR ELEC. HEATER 120V WHT ALL OTHERS BLK Fig. 39 — 42D (1200-2000) 2-Pipe Heating and Cooling with Auxiliary Heat — Remote/Wall-Mounted Thermostat (Line Voltage) and Dual Power Source a42-4069 NEC CLASS 2 WIRING Fig. 40 — 42C,S,V (except VG), and 42D (600-1000 cfm) 2-Pipe Cooling with Total Electric Heat — Transformer and Non-Carrier Relay Board (24-v) (Special Request) 24 a42-4070 Δ120-V WHT ALL OTHERS BLK NEC CLASS 1 WIRING Fig. 41 — 42C,S,V (except VG), and 42D (600-1000 cfm) 2-Pipe Cooling with Total Electric Heat — Field-Supplied/Installed Controls (Line Voltage and Control Valves or Electric Heat) a42-4071 Δ120-V WHT ALL OTHERS BLK NEC CLASS 1 WIRING Fig. 42 — 42D (1200-2000) 2-Pipe Cooling with Total Electric Heat — Field-Supplied/Installed Controls (Line Voltage and Control Valves or Electric Heat) 25 NOTE: Units may have 2 or 4 elements. Elements wired in parallel. a42-4072 Fig. 43 — 42SG,SH,SJ,VA,VB,VC,VE,VF 2-Pipe Cooling with Total Electric Heat — Unit-Mounted Debonair® Thermostat (24-v) and Duct Sensor a42-4073 Δ120-V WHT ALL OTHERS BLK NEC CLASS 1 WIRING Fig. 44 — 42SG,SH,SJ,VA,VB,VC,VE,VF 2-Pipe Cooling with Total Electric Heat — Unit-Mounted Thermostat (Line Voltage) 26 THERMOSTAT #33CSSN2-FC RS+5 DUCT SENSOR 33CSSEN-DS RS R G Y1 G3 W1 G2 C H2O CK1 RED YEL BLU BRN BLK PUR BLK RED ORG WHT VALVE BLK BLK 2 Q/C 1 YEL 33ZCRLYBRD YEL RED G QUICK CONNECT FAN BLU G2/(W) BLK G3/(Y) BLK COM (VALVE) RED 4 BLU (COOL) HI ORG (HEAT) YEL 24 RED L BLU M 3 BLK *WHT MED 2 1 BLOWER BLK H MOTOR WHT COM TRANSFORMER BLK EQUIPMENT GROUND BLK L1 L2 or N LOW WHT/RED BLK *WHT *WHT BRN YEL 0 YEL BLK L1 1 06 3 4 2 120/277V NC 7 COM 8 NO LIMIT SWITCH 6 BLK N BLK WHT EQUIPMENT GROUND ELEC. HEATER Fig. 45 — 42SG,SH,SJ,VA,VB,VC,VE,VF 2-Pipe Cooling with Total Electric Heat — Unit-Mounted Debonair® Thermostat (24-v), Duct Sensor and Dual Power Source Fig. 46 — 42SG,SH,SJ,VA,VB,VC,VE,VF 2-Pipe Cooling with Total Electric Heat — Unit-Mounted Thermostat (Line Voltage) and Dual Power Source 27 a42-4074 NEC CLASS 2 WIRING Fig. 47 — 42D (1200-2000) 2-Pipe Cooling with Total Electric Heat — Remote/Wall-Mounted Debonair® Thermostat (24-v) Fig. 48 — 42C,S,V (except VG), and 42D (600-1000 cfm) 2-Pipe Cooling with Total Electric Heat — Remote/Wall-Mounted Thermostat (Line Voltage) 28 THERMOSTAT #33CSSN2-FC REMOTE DEVICE BOX RS+5 RS R G Y1 G3 W1 G2 C H2O CK1 NEC CLASS 2 WIRING YEL BLU BRN BLK PUR RED ORG VALVE BLK COOL 2 Q/C 1 BLK YEL 33ZCRLYBRD G G2/(W) G3/(Y) COM YEL QUICK CONNECT FAN BLK (VALVE) RED 4 BLU RED L BLU M (COOL) 3 HI BLK BLOWER BLK H MOTOR 2 ORG (HEAT) YEL 24 *WHT MED 1 WHT COM TRANSFORMER BLK EQUIPMENT GROUND LOW WHT/RED BLK L1 *WHT *WHT L2 or N 0 YEL 1 BRN 06 EQUIPMENT GROUND 3 BLK 4 L1 2 NC LIMIT SWITCH 7 COM 8 NO 6 BLK BLK WHT N ELEC. HEATER Fig. 49 — 42C,S,V (except VG), and 42D (600-1000 cfm) 2-Pipe Cooling with Total Electric Heat — Remote/Wall-Mounted Debonair® Thermostat (24-v) and Dual Power Source REMOTE DEVICE BOX THERMOSTAT #33CSSN2-FC RS+5 RS R G Y1 G3 W1 G2 C H2O CK1 NEC CLASS 2 WIRING YEL BLU BRN BLK PUR RED ORG 33ZCRLYBRD G G2/(W) G3/(Y) COM FAN VALVE RED BLU (COOL) BLK BLK HI 2 Q/C 1 (HEAT) YEL BLK *WHT MED 4 3 2 1 RED L BLU M BLOWER BLK H MOTOR WHT COM LOW VER1.3 030700 G G2/(W) G3/(Y) COM *WHT 33ZCRLYBRD FAN QUICK CONNECT BLK (VALVE) YEL RED ORG 24 BLU (COOL) HI BLK TRANSFORMER BLK (HEAT) WHT/RED *WHT MED 4 RED L BLU M 3 2 1 BLOWER BLK H MOTOR WHT COM EQUIP.GROUND BLK YEL *WHT YEL 0 3 BLK 4 BLK 1 06 EQUIP.GROUND L1 LIMIT SWITCH LOW VER1.3 030700 BLK 2 NC COM NO 7 8 BLK 6 BLK BLK N. OR L2 WHT WHT WHT ELEC. HEATERS Fig. 50 — 42D (1200-2000) 2-Pipe Cooling with Total Electric Heat — Remote/Wall-Mounted Debonair® Thermostat (24-v) and Dual Power Source 29 BLK N. OR L2 *WHT L1 BLK COOL QUICK CONNECT BLK (VALVE) Fig. 51 — 42C,S,V (except VG), and 42D (600-1000 cfm) 2-Pipe Cooling with Total Electric Heat — Remote/Wall-Mounted Thermostat (Line Voltage) and Dual Power Source ONLY 120V WHT/ALL OTHERS BLK Fig. 52 — 42D (1200-2000) 2-Pipe Cooling with Total Electric Heat — Remote/Wall-Mounted Thermostat (Line Voltage) and Dual Power Source 30 a42-4075 NEC CLASS 2 WIRING Fig. 53 — 42C,S,V (except VG), and 42D (600-1000 cfm) 4-Pipe Heating and Cooling — Transformer and Non-Carrier Relay Board (24-v) (Special Request) Δ120-V WHT ALL OTHERS BLK a42-4076 NEC CLASS 1 WIRING Fig. 54 — 42C,S,V (except VG), and 42D (600-1000 cfm) 4-Pipe Heating and Cooling — Field-Supplied/Installed Controls (Line Voltage and Control Valves) 31 a42-4077 Δ120-V WHT ALL OTHERS BLK NEC CLASS 1 WIRING Fig. 55 — 42D (1200-2000) 4-Pipe Heating and Cooling — Field-Supplied/Installed Controls (Line Voltage and Control Valves) a42-4078 Fig. 56 — 42SG,SH,SJ,VA,VB,VC,VE,VF 4-Pipe Heating and Cooling — Unit-Mounted Debonair® Thermostat (24-v) and Duct Sensor 32 a42-4079 Δ120-V WHT ALL OTHERS BLK NEC CLASS 1 WIRING Fig. 57 — 42SG,SH,SJ,VA,VB,VC,VE,VF 4-Pipe Heating and Cooling — Unit-Mounted Thermostat (Line Voltage) THERMOSTAT #33CSSN2-FC REMOTE DEVICE BOX RS+5 RS R G Y1 G3 W1 G2 C H2O CK1 NEC CLASS 2 WIRING YEL BLU BRN BLK PUR RED ORG VALVE BLK COOL BLK 2 Q/C 1 PUR YEL 33ZCRLYBRD VALVE BLK HEAT BLK 2 Q/C 1 BRN YEL G G2/(W) G3/(Y) COM QUICK CONNECT FAN BLK (VALVE) YEL RED BLU (COOL) HI YEL (HEAT) YEL 24 MED BLK 4 RED L BLU M 3 BLOWER BLK H 2 1 MOTOR WHT COM TRANSFORMER LOW EQUIPMENT GROUND L1 L2 or N BLK *WHT BLK *WHT Fig. 58 — 42C,S,V (except VG), and 42D (600-1000 cfm) 4-Pipe Heating and Cooling — Remote/Wall-Mounted Debonair® Thermostat (24-v) 33 a42-4080 Fig. 59 — 42D (1200-2000) 4-Pipe Heating and Cooling — Remote/Wall-Mounted Debonair® Thermostat (24-v) ONLY 120V WHT/ALL OTHERS BLK Fig. 60 — 42C,S,V (except VG), and 42D (600-1000 cfm) 4-Pipe Heating and Cooling — Remote/Wall-Mounted Thermostat (Line Voltage) 34 Fig. 61 — 42D (1200-2000) 4-Pipe Heating and Cooling — Remote/Wall-Mounted Thermostat (Line Voltage) NEC CLASS 1 WIRING a42-4081 Fig. 62 — 42SG,SH,SJ,VA,VB,VC,VE,VF No Controls — Unit-Mounted 3-Speed Switch Only 35 Fig. 63 — 42C,S,V and 42D (600-1000 cfm) No Controls — Wall-Mounted 3-Speed Switch Only Fig. 64 — 42D (1200-2000) No Controls — Wall-Mounted 3-Speed Switch Only 36 a42-4082 Fig. 65 — 42B No Controls — Single-Phase Unit a42-4083 Fig. 66 — 42B No Controls — 3-Phase Unit 37 a42-4083 **Only used with overflow switch. NOTES: 1. This is a point-to-point electrical diagram. 2. Caution: Disconnect power before servicing. 3. See nameplate for correct voltage. Use 75 C minimum copper conductors only. Unit terminals are not designed to accept any other wiring. 4. Blower motor(s) thermally protected. 5. To ensure proper fan interlock and sequencing, external controller must energize heater stages in numerical order shown and deenergize stages in reverse order (first on, last off). 6. All contractor wiring must conform to electrical codes, national and local. Fig. 67 — 42B Motor Controls — Single-Phase Only a42-4085 NOTES: 1. This is a point-to-point electrical diagram. 2. Caution: Disconnect power before servicing. 3. See nameplate for correct voltage. Use 75 C minimum copper conductors only. Unit terminals are not designed to accept any other wiring. 4. Blower motor(s) thermally protected. 5. To ensure proper fan interlock and sequencing, external controller must energize heater stages in numerical order shown and deenergize stages in reverse order (first on, last off). 6. All contractor wiring must conform to electrical codes, national and local. Fig. 68 — 42B Motor Controls — 3-Phase Only 38 a42-4086 NOTES: 1. This is a point-to-point electrical diagram. 2. Caution: Disconnect power before servicing. 3. See nameplate for correct voltage. Use 75 C minimum copper conductors only. Unit terminals are not designed to accept any other wiring. 4. Blower motor(s) thermally protected. 5. To ensure proper fan interlock and sequencing, external controller must energize heater stages in numerical order shown and deenergize stages in reverse order (first on, last off). 6. All contractor wiring must conform to electrical codes, national and local. 7. Wire as detail A for 120/277-v. Fig. 69 — 42B Motor Controls — Single-Phase with Interlocking Disconnect a42-4087 NOTES: 1. This is a point-to-point electrical diagram. 2. Caution: Disconnect power before servicing. 3. See name plate for correct voltage. Use 75 C minimum copper conductors only. Unit terminals are not designed to accept any other wiring. 4. Blower motor(s) thermally protected. 5. To ensure proper fan interlock and sequencing, external controller must energize heater stages in numerical order shown and deenergize stages in reverse order (first on, last off). 6. All contractor wiring must conform to codes, national and local electrical. Fig. 70 — 42B Motor Controls — 3-Phase with Interlocking Disconnect 39 40 Fig. 71 — 42B Motor Controls — Single-Phase with Interlocking Disconnect and 1-Stage Electric Heater NOTES: 1. This is a point-to-point electrical diagram. 2. Caution: Disconnect power before servicing. 3. See nameplate for correct voltage. Use 75 C minimum copper conductors only. Unit terminals are not designed to accept any other wiring. 4. Blower motor thermally protected. 5. To ensure proper fan interlock and sequencing, external controller must energize heater stages in numerical order shown and deenergize stages in reverse order (i.e., first on will be last off). 6. All contractor wiring must conform to national and local electrical codes. 7. L2 or N label to be placed on bridge near terminal block or disconnect. Label to be oriented along path of incoming L2 or N. 8. Wires 4 and 5 to be installed as shown in detail A when using part number E035-50011401 disconnect switch, except wire 5 as shown in Detail C when 120/277-v. All other disconnect switches to be wired as shown in main diagram. 9. Only on 208-240-v. a42-4088 41 NOTES: 1. This is a point-to-point electrical diagram. 2. Caution: Disconnect power before servicing. 3. See nameplate for correct voltage. Use 75 C minimum copper conductors only. Unit terminals are not designed to accept any other wiring. 4. Blower motor thermally protected. 5. To ensure proper fan interlock and sequencing, external controller must energize heater stages in numerical order shown and deenergize stages in reverse order (i.e., first on will be last off). 6. All contractor wiring must conform to national and local electrical codes. 7. Wires 9, 13, and 14 will terminate inside contactor lug. 8. Wires 4, 5, and 6 to be installed as shown in Detail A when using part number E035-50011401 disconnect switch. All other disconnect switches to be wired as shown in the main diagram. 9. Use applicable heater configuration shown for proper connections. Fig. 72 — 42B Motor Controls — 3-Phase with Interlocking Disconnect and 1-Stage Electric Heater a42-4089 42 Fig. 73 — 42B Motor Controls — 3-Phase with Interlocking Disconnect and 2-Stage Electric Heater NOTES: 1. This is a point-to-point electrical diagram. 2. Caution: Disconnect power before servicing. 3. See nameplate for correct voltage. Use 75 C minimum copper conductors only. Unit terminals are not designed to accept any other wiring. 4. Blower motor thermally protected. 5. To ensure proper fan interlock and sequencing, external controller must energize heater stages in numerical order shown and deenergize stages in reverse order (i.e., first on will be last off). 6. All contractor wiring must conform to local and national electrical codes. 7. Wires 9, 13, and 14 will terminate inside contactor lug. 8. Wires 4, 5, and 6 to be installed as shown in Detail A when using part number E035-50011401 disconnect switch. All other disconnect switches to be wired as shown in the main diagram. a42-4090 43 NOTES: 1. This is a point-to-point electrical diagram. 2. Caution: Disconnect power before servicing. 3. See nameplate for correct voltage. Use 75 C minimum copper conductors only. Unit terminals are not designed to accept any other wiring. 4. Blower motor thermally protected. 5. To ensure proper fan interlock and sequencing, external controller must energize heater stages in numerical order shown and deenergize stages in reverse order (i.e., first on will be last off). 6. All contractor wiring must conform to local and national electrical codes. 7. Wires 9, 13, and 14 will terminate inside contactor lug. 8. Wires 4, 5, and 6 to be installed as shown in Detail A when using part number E035-50011401 disconnect switch. All other disconnect switches to be wired as shown in the main diagram. Fig. 74 — 42B Motor Controls — 3-Phase with Interlocking Disconnect and 3-Stage Electric Heater a42-4091 a42-4092 Fig. 75 — 42B Sunne T-170 Thermostat — 2-Pipe Cool/Heat a42-4093 Fig. 76 — 42B Sunne T-170 Thermostat — 2-Pipe Cooling With Electric Heat 44 a42-4094 Fig. 77 — 42B Sunne T-170 Thermostat — 4-Pipe Cooling and Heating TRANSFORMER Fig. 78 — Master/Slave Wiring Diagram (Special Request) — Master Control Option 45 Fig. 79 — Master/Slave Wiring Diagram (Special Request) — Slave Control Option 46 Copyright 2008 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-56420002-01 Printed in U.S.A. Form 42-3W Pg 48 10-08 Replaces: 42-2W