User Guide
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... zero-droop performance. • Attractive styling complements any décor. • Two heat/one cool; Honeywell heat pump thermostats are located by LCD for all -in-one cool; automatic or manual changeover. • Two-piece, front-wired construc- W8900 Remote Panel mounts near the heating and cooling equipment. • Optional remote sensors can be used keys are ideal for...
... zero-droop performance. • Attractive styling complements any décor. • Two heat/one cool; Honeywell heat pump thermostats are located by LCD for all -in-one cool; automatic or manual changeover. • Two-piece, front-wired construc- W8900 Remote Panel mounts near the heating and cooling equipment. • Optional remote sensors can be used keys are ideal for...
User Guide
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... at 1, 3, 6, or 9 cph. The user can program up to two-speed heat pump equipment: 1. Electronic thermostats provide droopless temperature control. Models include LED indication for changeover in the wiring diagram below. 5. To connect the T8611M to three-stage heat and two-stage cool control for heat pump systems, using manual changeover. Configure the O/B terminal for system operation and...
... at 1, 3, 6, or 9 cph. The user can program up to two-speed heat pump equipment: 1. Electronic thermostats provide droopless temperature control. Models include LED indication for changeover in the wiring diagram below. 5. To connect the T8611M to three-stage heat and two-stage cool control for heat pump systems, using manual changeover. Configure the O/B terminal for system operation and...
User Guide
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... programming capability. See the following wiring diagrams for heat pumps that provide changeover in the heating mode and for heat pump systems, using manual or automatic changeover. When the system switch is in the COOL position, the O terminal is energized... and T8611M Y terminal. First stage heat anticipation is selectable. HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE Chronotherm IV Electronic Deluxe Heat Pump Thermostats The T8611 Chronotherm IV thermostat models provide up mode in the Chronotherm IV thermostat. Honeywell does not recommend this requirement, ...
... programming capability. See the following wiring diagrams for heat pumps that provide changeover in the heating mode and for heat pump systems, using manual or automatic changeover. When the system switch is in the COOL position, the O terminal is energized... and T8611M Y terminal. First stage heat anticipation is selectable. HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE Chronotherm IV Electronic Deluxe Heat Pump Thermostats The T8611 Chronotherm IV thermostat models provide up mode in the Chronotherm IV thermostat. Honeywell does not recommend this requirement, ...
User Guide
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...wiring connections for electronic thermostats. R (Power) E C (Common) E (EM. However, this manner disables the fan switch in the emergency heat mode. Existing Control Equipment Function Terminal Designation Transformer Common C 1st Stage Cooling Y1 1st Stage Heating W1 New Terminal Designation C Y O M13235 Fig. 5. Heat) G G (Fan) Thermostat... on the TRADELINE and SUPER TRADELINE models, follow the wiring diagram shown below. Require relay (R8222B1067 typically) for first stage heat. position), the thermostat controls the fan operation with a call for proper operation...
...wiring connections for electronic thermostats. R (Power) E C (Common) E (EM. However, this manner disables the fan switch in the emergency heat mode. Existing Control Equipment Function Terminal Designation Transformer Common C 1st Stage Cooling Y1 1st Stage Heating W1 New Terminal Designation C Y O M13235 Fig. 5. Heat) G G (Fan) Thermostat... on the TRADELINE and SUPER TRADELINE models, follow the wiring diagram shown below. Require relay (R8222B1067 typically) for first stage heat. position), the thermostat controls the fan operation with a call for proper operation...
User Guide
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... and W1 terminals with a heating changeover. HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE Equipment Equipment Function Terminals Transformer Common C Power R Fan G 1st Stage Heating W1 1st Stage Cooling Y1 Changeover Valve B PC8900 Terminals C R G O/B Y1/W1 2nd Stage Heating W2 Aux. Emergency Heat E E 2nd Stage Cooling Y2 Y2 M13234 Fig. 13. Emergency Heat E E 2nd Stage Cooling Y2 Y2 M13233 Fig. 12. Relay wiring connections for PC8900 in...
... and W1 terminals with a heating changeover. HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE Equipment Equipment Function Terminals Transformer Common C Power R Fan G 1st Stage Heating W1 1st Stage Cooling Y1 Changeover Valve B PC8900 Terminals C R G O/B Y1/W1 2nd Stage Heating W2 Aux. Emergency Heat E E 2nd Stage Cooling Y2 Y2 M13234 Fig. 13. Emergency Heat E E 2nd Stage Cooling Y2 Y2 M13233 Fig. 12. Relay wiring connections for PC8900 in...
User Guide
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... on a temperature rise (auto changeover). C/O-Changeover (heat pumps). The thermostat automatically changes between heat and cool modes as follows: Auto changeover-refers to hookup symbols. 70-6627 • 13 HT.-HEAT-OFFCOOL switching). H2-Stage 2 Heating. All T874 Multistage Thermostats use mercury switches. HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE Understanding Circuits To understand wiring diagrams, it is important to know...
... on a temperature rise (auto changeover). C/O-Changeover (heat pumps). The thermostat automatically changes between heat and cool modes as follows: Auto changeover-refers to hookup symbols. 70-6627 • 13 HT.-HEAT-OFFCOOL switching). H2-Stage 2 Heating. All T874 Multistage Thermostats use mercury switches. HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE Understanding Circuits To understand wiring diagrams, it is important to know...
User Guide
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HT. RELAY SYSTEM MONITOR X LACO Y HEAT CHANGEOVER VALVE COMPRESSOR CONTACTOR O COOL CHANGEOVER VALVE CHP M6060A Fig. 16. W2 AUX. HT. HT. Internal schematic and typical wiring diagram for T841A1308. 70-6627 • 15 HT. HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE Typical System Hookup Diagrams L1 L2 (HOT) RTD 1 1 ODT 1 H1 C1 FALL H1/C1 ANTICIPATOR...
HT. RELAY SYSTEM MONITOR X LACO Y HEAT CHANGEOVER VALVE COMPRESSOR CONTACTOR O COOL CHANGEOVER VALVE CHP M6060A Fig. 16. W2 AUX. HT. HT. Internal schematic and typical wiring diagram for T841A1308. 70-6627 • 15 HT. HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE Typical System Hookup Diagrams L1 L2 (HOT) RTD 1 1 ODT 1 H1 C1 FALL H1/C1 ANTICIPATOR...
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... COMPRESSOR CONTACTOR Y Fig. 18. Internal schematic and typical wiring diagram for T841A1555. HEAT PUMP TH ERMOSTAT CROSS REFERENCE/SELECTION GUIDE 9 H1 C1 FALL 2 C ANTICIPATOR 3 H1/C ANTICIPATOR 5 FAN SWITCH AUTO ON G W U AUX. HT. HEAT LED (RED) W3 RELAY COOL CHANGEOVER RELAY G R E X AUX. COMPRESSOR MONITOR R OUTDOOR THERMOSTAT X2 T OUTDOOR O THERMISTOR COOL CHANGEOVER RELAY COMPRESSOR CONTACTOR Y 2 FIELD REMOVABLE JUMPER...
... COMPRESSOR CONTACTOR Y Fig. 18. Internal schematic and typical wiring diagram for T841A1555. HEAT PUMP TH ERMOSTAT CROSS REFERENCE/SELECTION GUIDE 9 H1 C1 FALL 2 C ANTICIPATOR 3 H1/C ANTICIPATOR 5 FAN SWITCH AUTO ON G W U AUX. HT. HEAT LED (RED) W3 RELAY COOL CHANGEOVER RELAY G R E X AUX. COMPRESSOR MONITOR R OUTDOOR THERMOSTAT X2 T OUTDOOR O THERMISTOR COOL CHANGEOVER RELAY COMPRESSOR CONTACTOR Y 2 FIELD REMOVABLE JUMPER...
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...C1 ANTICIPATOR FAN SWITCH AUTO ON SYSTEM SWITCH EM .HT. Fig. 20. R L1 (HOT) L2 1 X Y1 COMPRESSOR CONTACTOR O COOL CHANGEOVER VALVE M6068A Fig. 19. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. HT. L1 (HOT) L2 1 M1593 70-6627 •...and typical wiring diagram for T841B1000. AUTO OFF C815A OUTDOOR THERMISTOR T FAN RELAY G CHANGEOVER VALVE O R X2 OUTDOOR THERMOSTAT W AUX. LED (GREEN) B EM. HT. LED (RED) F AUX. RELAY Y RISE C1 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. HEAT PUMP THERMOSTAT CROSS ...
...C1 ANTICIPATOR FAN SWITCH AUTO ON SYSTEM SWITCH EM .HT. Fig. 20. R L1 (HOT) L2 1 X Y1 COMPRESSOR CONTACTOR O COOL CHANGEOVER VALVE M6068A Fig. 19. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. HT. L1 (HOT) L2 1 M1593 70-6627 •...and typical wiring diagram for T841B1000. AUTO OFF C815A OUTDOOR THERMISTOR T FAN RELAY G CHANGEOVER VALVE O R X2 OUTDOOR THERMOSTAT W AUX. LED (GREEN) B EM. HT. LED (RED) F AUX. RELAY Y RISE C1 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. HEAT PUMP THERMOSTAT CROSS ...
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...HT. HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE FALL 1 H1 ANTICIPATOR 2 H1 4 6 H2 ANTICIPATOR H2 FALL RISE 8 C1 9 C1 ANTICIPATOR 10 11 RISE CO 12 FAN SWITCH AUTO ON SYSTEM SWITCH OFF EM. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. HEAT AUTO COOL W2... E AUX. HT. HT. HT. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 W1 - Internal schematic and typical wiring diagram for Y594G1633. HEAT LED (GREEN) AUX. LED (GREEN) X1 EM. HEAT RELAY CHECK LED (RED) ...
...HT. HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE FALL 1 H1 ANTICIPATOR 2 H1 4 6 H2 ANTICIPATOR H2 FALL RISE 8 C1 9 C1 ANTICIPATOR 10 11 RISE CO 12 FAN SWITCH AUTO ON SYSTEM SWITCH OFF EM. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. HEAT AUTO COOL W2... E AUX. HT. HT. HT. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 W1 - Internal schematic and typical wiring diagram for Y594G1633. HEAT LED (GREEN) AUX. LED (GREEN) X1 EM. HEAT RELAY CHECK LED (RED) ...
User Guide
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... 6 FAN SWITCH AUTO ON SYSTEM SWITCH EM. Internal schematic and typical wiring diagram for Y594R1797. HEAT OFF R L EM. Fig. 24. HEATER RELAY B COMPRESSOR MONITOR F R 1 L1 (HOT) L2 T X2 OUTDOOR THERMOSTAT O COMPRESSOR CONTACTOR Y OUTDOOR SENSOR COOL CHANGEOVER VALVE M8701 Fig. 23. HEAT LED (GRN) AUX. HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE 1 2 H1 C1 FALL 3 4 H2 FALL 5 6 11...
... 6 FAN SWITCH AUTO ON SYSTEM SWITCH EM. Internal schematic and typical wiring diagram for Y594R1797. HEAT OFF R L EM. Fig. 24. HEATER RELAY B COMPRESSOR MONITOR F R 1 L1 (HOT) L2 T X2 OUTDOOR THERMOSTAT O COMPRESSOR CONTACTOR Y OUTDOOR SENSOR COOL CHANGEOVER VALVE M8701 Fig. 23. HEAT LED (GRN) AUX. HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE 1 2 H1 C1 FALL 3 4 H2 FALL 5 6 11...
User Guide
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... VALVE B W1 RELAY W1 2 COMPRESSOR CONTACTOR Y L1 (HOT) L2 1 M8713 Fig. 25. HT. O COOL CHANGEOVER VALVE L COMPRESSOR MONITOR FAN RELAY G R EM. HT. HT. Internal schematic and typical wiring diagram for Y594R1425. 70-6627 • 20 HT. HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE W3 W3 RELAY H1 ANTICIPATOR 1 C ANTICIPATOR 2 FAN SWITCH AUTO ON H1...
... VALVE B W1 RELAY W1 2 COMPRESSOR CONTACTOR Y L1 (HOT) L2 1 M8713 Fig. 25. HT. O COOL CHANGEOVER VALVE L COMPRESSOR MONITOR FAN RELAY G R EM. HT. HT. Internal schematic and typical wiring diagram for Y594R1425. 70-6627 • 20 HT. HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE W3 W3 RELAY H1 ANTICIPATOR 1 C ANTICIPATOR 2 FAN SWITCH AUTO ON H1...
User Guide
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...MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 DENOTES THERMOSTAT TO SUBBASE INTERCONNECT. HT. L1 (HOT) L2 1 70-6627 • 21 HT. LED (GREEN) L HEAT 2 MONITOR W2 AUX. O. B HEAT CHANGEOVER VALVE HIGH LIMIT HEAT 1 1 POWER SUPPLY. LED (RED) R C/X AUX. HT. HT. HT. COOL CHANGEOVER VALVE O COOL C. Y X1 3 CHECK LED (YELLOW) ... SWITCH TO C (COMMON) SIDE OF SYSTEM TRANSFORMER SWITCH IN SECONDARY OF SEPARATE TRANSFORMER M6020A Fig. 26. HEAT OFF AUTO COOL C. Typical wiring diagram for T8611G1004 and T8611G1103. RELAY FAN RELAY G SYSTEM SWITCH EM.
...MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 DENOTES THERMOSTAT TO SUBBASE INTERCONNECT. HT. L1 (HOT) L2 1 70-6627 • 21 HT. LED (GREEN) L HEAT 2 MONITOR W2 AUX. O. B HEAT CHANGEOVER VALVE HIGH LIMIT HEAT 1 1 POWER SUPPLY. LED (RED) R C/X AUX. HT. HT. HT. COOL CHANGEOVER VALVE O COOL C. Y X1 3 CHECK LED (YELLOW) ... SWITCH TO C (COMMON) SIDE OF SYSTEM TRANSFORMER SWITCH IN SECONDARY OF SEPARATE TRANSFORMER M6020A Fig. 26. HEAT OFF AUTO COOL C. Typical wiring diagram for T8611G1004 and T8611G1103. RELAY FAN RELAY G SYSTEM SWITCH EM.
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...3 C AUX. HT. HT. HEAT CHANGEOVER VALVE B STAGE 1 COMPRESSOR CONTACTOR Y STAGE 2 COMPRESSOR CONTACTOR Y2 COOL 2 X1 2 CHECK LED (YELLOW) X2 L1 (HOT) L2 1 1 POWER SUPPLY. Typical wiring diagram for T8611M7008. RELAY E SYSTEM SWITCH EM. HEAT OFF AUTO COOL COOL 1 FAN RELAY G COOL CHANGEOVER C. ROUTE INTERCONNECT CABLE AWAY FROM... CABLE: 18-GAUGE THERMOSTAT CABLE, 200 FT. (61 M) MAXIMUM LENGTH. RELAY W3 HEAT 3 STAGE 2 RELAY W2 HEAT 2 EM. M2656 70-6627 • 22 O. HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE THERMOSTAT LOGIC CIRCUIT POWER SUPPLY...
...3 C AUX. HT. HT. HEAT CHANGEOVER VALVE B STAGE 1 COMPRESSOR CONTACTOR Y STAGE 2 COMPRESSOR CONTACTOR Y2 COOL 2 X1 2 CHECK LED (YELLOW) X2 L1 (HOT) L2 1 1 POWER SUPPLY. Typical wiring diagram for T8611M7008. RELAY E SYSTEM SWITCH EM. HEAT OFF AUTO COOL COOL 1 FAN RELAY G COOL CHANGEOVER C. ROUTE INTERCONNECT CABLE AWAY FROM... CABLE: 18-GAUGE THERMOSTAT CABLE, 200 FT. (61 M) MAXIMUM LENGTH. RELAY W3 HEAT 3 STAGE 2 RELAY W2 HEAT 2 EM. M2656 70-6627 • 22 O. HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE THERMOSTAT LOGIC CIRCUIT POWER SUPPLY...
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... EM. HT. RELAY E STAGE 1 HEAT RELAY W1 FAN RELAY G COOL 1 HEAT 1 O 2 COOL CHANGEOVER VALVE B HEAT CHANGEOVER VALVE Y1 COMPRESSOR CONTACTOR P 1 POWER SUPPLY. DEFROST CONTROL M6019A Fig. 28. Typical wiring diagram for T8011R and T8411R. 70-6627 • 23 HT. RELAY HEAT 2 EM. HT. Typical wiring diagram for T8611R1000. L1 (HOT) L2 1 THERMISTOR SENSOR THERMOSTAT LOGIC STAGE 2 RELAY STAGE 1 RELAY SYSTEM SWITCH EM...
... EM. HT. RELAY E STAGE 1 HEAT RELAY W1 FAN RELAY G COOL 1 HEAT 1 O 2 COOL CHANGEOVER VALVE B HEAT CHANGEOVER VALVE Y1 COMPRESSOR CONTACTOR P 1 POWER SUPPLY. DEFROST CONTROL M6019A Fig. 28. Typical wiring diagram for T8011R and T8411R. 70-6627 • 23 HT. RELAY HEAT 2 EM. HT. Typical wiring diagram for T8611R1000. L1 (HOT) L2 1 THERMISTOR SENSOR THERMOSTAT LOGIC STAGE 2 RELAY STAGE 1 RELAY SYSTEM SWITCH EM...
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... 1 (HOT) L2 R THERMOSTAT LOGIC POWER SUPPLY W2 W1 E Y1 G O/B W2 W1 C COMPRESSOR CONTACTOR HEAT W1 AUXILIARY HEAT RELAY W2 3 EMERGENCY HEAT RELAY E COMPRESSOR CONTACTOR Y1 E Y1 G O/B FAN RELAY G 2 CHANGEOVER VALVE O/B 1 POWER SUPPLY. Typical wiring diagram for T8511G. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 O/B IS FIELD CONFIGURABLE TO SELECT ENERGIZED IN HEATING OR COOLING. (DEFAULT IS...
... 1 (HOT) L2 R THERMOSTAT LOGIC POWER SUPPLY W2 W1 E Y1 G O/B W2 W1 C COMPRESSOR CONTACTOR HEAT W1 AUXILIARY HEAT RELAY W2 3 EMERGENCY HEAT RELAY E COMPRESSOR CONTACTOR Y1 E Y1 G O/B FAN RELAY G 2 CHANGEOVER VALVE O/B 1 POWER SUPPLY. Typical wiring diagram for T8511G. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 O/B IS FIELD CONFIGURABLE TO SELECT ENERGIZED IN HEATING OR COOLING. (DEFAULT IS...
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...REFERENCE/SELECTION GUIDE L1 1 (HOT) L2 R POWER SUPPLY THERMOSTAT LOGIC W2 W1 E C COMPRESSOR CONTACTOR HEAT W1 AUXILIARY HEAT RELAY W2 4 EMERGENCY HEAT RELAY E COMPRESSOR CONTACTOR Y1 Y O/B G 1 POWER SUPPLY. Typical wiring diagram for T8611G2002 and T8611G2028. CHANGEOVER VALVE FAN RELAY COMPRESSOR MONITOR... DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 WIRES TO OT TERMINALS SHOULD NOT SHARE CABLE WITH OTHER CONNECTIONS. 3 INSTALLER CONFIGURABLE. FACTORY DEFAULT IS O-ENERGIZED IN COOL MODE. 4 FACTORY-INSTALLED JUMPER; REMOVE IF A HEAT RELAY IS CONNECTED TO W1. 3 O/B G ...
...REFERENCE/SELECTION GUIDE L1 1 (HOT) L2 R POWER SUPPLY THERMOSTAT LOGIC W2 W1 E C COMPRESSOR CONTACTOR HEAT W1 AUXILIARY HEAT RELAY W2 4 EMERGENCY HEAT RELAY E COMPRESSOR CONTACTOR Y1 Y O/B G 1 POWER SUPPLY. Typical wiring diagram for T8611G2002 and T8611G2028. CHANGEOVER VALVE FAN RELAY COMPRESSOR MONITOR... DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 WIRES TO OT TERMINALS SHOULD NOT SHARE CABLE WITH OTHER CONNECTIONS. 3 INSTALLER CONFIGURABLE. FACTORY DEFAULT IS O-ENERGIZED IN COOL MODE. 4 FACTORY-INSTALLED JUMPER; REMOVE IF A HEAT RELAY IS CONNECTED TO W1. 3 O/B G ...
User Guide
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..., provides the information needed to W1 if a separate terminal is used for first stage heat and cool, or to choose and wire the Honeywell electromechanical, Chronotherm III, or electronic heat pump thermostats in each section to cool. - O terminal cool or B terminal heat is required for verification. Identify what action, if any, is typical. - e.g., a working family may not be used. 8. Connect...
..., provides the information needed to W1 if a separate terminal is used for first stage heat and cool, or to choose and wire the Honeywell electromechanical, Chronotherm III, or electronic heat pump thermostats in each section to cool. - O terminal cool or B terminal heat is required for verification. Identify what action, if any, is typical. - e.g., a working family may not be used. 8. Connect...
User Guide
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... heat LED indication, jumper X2 to E. » Relay required (R8222B1067 typically) for wiring diagram. ¿ Optional LED indication activated with completed circuit on Q674. See page 9 for T8511M, T8611M, PC8900/W8900B1002 application. Heat ...R R R 1st Stage Cool Y1 » Y1 » » » » » 1st Stage Heat W1 W1 » » » » · 2nd Stage Heat W2 W2 W2 Y2 Y2 W2 Fan G G C/O Valve - System Defrost LED Indication X B · E - - M13148 TYPICAL THERMOSTATS AND SUBBASES - HONEYWELL MODEL NUMBER (CUSTOMER PART...
... heat LED indication, jumper X2 to E. » Relay required (R8222B1067 typically) for wiring diagram. ¿ Optional LED indication activated with completed circuit on Q674. See page 9 for T8511M, T8611M, PC8900/W8900B1002 application. Heat ...R R R 1st Stage Cool Y1 » Y1 » » » » » 1st Stage Heat W1 W1 » » » » · 2nd Stage Heat W2 W2 W2 Y2 Y2 W2 Fan G G C/O Valve - System Defrost LED Indication X B · E - - M13148 TYPICAL THERMOSTATS AND SUBBASES - HONEYWELL MODEL NUMBER (CUSTOMER PART...
User Guide
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Equipment requires normaly energized emergency heat...10 Relay wiring connections for Lennox equipment (HP9, HP10). HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE Index to operate the system monitor light (emergency heat LED) on TRADELINE replacement thermostats. Tape off if light is desired on heat pumps requiring cooling mode changeover...8 Changing fan operation in heat pump applications requiring separate Y1 and...
Equipment requires normaly energized emergency heat...10 Relay wiring connections for Lennox equipment (HP9, HP10). HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE Index to operate the system monitor light (emergency heat LED) on TRADELINE replacement thermostats. Tape off if light is desired on heat pumps requiring cooling mode changeover...8 Changing fan operation in heat pump applications requiring separate Y1 and...