User Guide
Page 2
... excellent temperature control. • Electromechanical. • Classic styling. • Two heat/one cool; NON-PROGRAMMABLE HEAT PUMP THERMOSTATS T841 Standard Non-Programmable Thermostat • Good performance without any décor. • Two heat/one cool; Honeywell heat pump thermostats are ideal for optimum temperature control. • Up to three heat/two cool. • Seven-day (auto copy) programming. • Large, continuously lit...
... excellent temperature control. • Electromechanical. • Classic styling. • Two heat/one cool; NON-PROGRAMMABLE HEAT PUMP THERMOSTATS T841 Standard Non-Programmable Thermostat • Good performance without any décor. • Two heat/one cool; Honeywell heat pump thermostats are ideal for optimum temperature control. • Up to three heat/two cool. • Seven-day (auto copy) programming. • Large, continuously lit...
User Guide
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... AY28Y078 and AY28Y139. Same as Y594G1419, except Premier White™; Includes T874G1204/Q674J1043. W,Y,G,R,O, X2,T,F,B SUPER TRADELINE®; includes T874R1616/Q674L1587. W1,W2,W3, G,Y,R,O,B, E,X,X2,L Stages Systems Heat Cool Switch Changeover 2 1 EM.HT.- or cool AUX. HT. or cool AUX. HT. CHECKc AUTO- COOL 2 1 EM. HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE Heat Pump Thermostat Model Specifications Table 1. HT. (Fig. 17). Fixed...
... AY28Y078 and AY28Y139. Same as Y594G1419, except Premier White™; Includes T874G1204/Q674J1043. W,Y,G,R,O, X2,T,F,B SUPER TRADELINE®; includes T874R1616/Q674L1587. W1,W2,W3, G,Y,R,O,B, E,X,X2,L Stages Systems Heat Cool Switch Changeover 2 1 EM.HT.- or cool AUX. HT. or cool AUX. HT. CHECKc AUTO- COOL 2 1 EM. HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE Heat Pump Thermostat Model Specifications Table 1. HT. (Fig. 17). Fixed...
User Guide
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...OT 1 EM.HT.- COOL T8611M2025 Same as T8611G2002 except Premier Y1,W1,W2, 2...COOL T8611G2028 Same as T8611M2017 except Premier Y1,Y2,W2, 3 White™, 7-day program capability. AUTO- W3,G,E,L,R, Programmable fan and back lighting O/B,C,X1, features. Automatica HEAT-OFF- Order Number Description Terminals Stages Systems Heat Cool Switch Changeover T8611G2002 TRADELINE®; Automatica HEAT-OFF- COOL...HEAT-OFF- X2,OT,OT 2 EM.HT.- COOL a In freezing climates, be sure the cooling... SYSTEM LED lights when heating or cooling equipment is applies to HVAC maintenance...
...OT 1 EM.HT.- COOL T8611M2025 Same as T8611G2002 except Premier Y1,W1,W2, 2...COOL T8611G2028 Same as T8611M2017 except Premier Y1,Y2,W2, 3 White™, 7-day program capability. AUTO- W3,G,E,L,R, Programmable fan and back lighting O/B,C,X1, features. Automatica HEAT-OFF- Order Number Description Terminals Stages Systems Heat Cool Switch Changeover T8611G2002 TRADELINE®; Automatica HEAT-OFF- COOL...HEAT-OFF- X2,OT,OT 2 EM.HT.- COOL a In freezing climates, be sure the cooling... SYSTEM LED lights when heating or cooling equipment is applies to HVAC maintenance...
User Guide
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... the Q674 Subbase for second stage heating. HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE Thermostat Descriptions and General Information This section describes some of the interstage differential. When this difference, an outdoor thermistor is fixed. cooling anticipator is not provided, use of the heat pump thermostats that Honeywell manufactures. NOTE: All Honeywell electronic heat pump thermostats are permanently held in the heater...
... the Q674 Subbase for second stage heating. HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE Thermostat Descriptions and General Information This section describes some of the interstage differential. When this difference, an outdoor thermistor is fixed. cooling anticipator is not provided, use of the heat pump thermostats that Honeywell manufactures. NOTE: All Honeywell electronic heat pump thermostats are permanently held in the heater...
User Guide
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...-speed equipment. Connect the Y2 terminal to the Y2 terminal. HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE T8511 Deluxe Electronic Heat Pump Thermostats The T8511 models control two-stage heat and one -stage cool control for heat pump systems, using manual or automatic changeover. However, there is a three-stage heat/two-stage cool thermostat used to four time periods and temperature setpoints. Using the...
...-speed equipment. Connect the Y2 terminal to the Y2 terminal. HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE T8511 Deluxe Electronic Heat Pump Thermostats The T8511 models control two-stage heat and one -stage cool control for heat pump systems, using manual or automatic changeover. However, there is a three-stage heat/two-stage cool thermostat used to four time periods and temperature setpoints. Using the...
User Guide
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... malfunction by function: H1-Stage 1 Heating. C2-Stage 2 Cooling. Cool changeover valve-operates on a temperature fall (auto changeover). H3-Stage 3 Heating. Each schematic indicates switch operation by being drawn in the system switching (EX: Q674F with OFF-COOL AUTO-HEAT-EM. Key to change mode (EX: Q674L with EM. C3-Stage 3 Cooling. The thermostat automatically changes between heat and cool modes as follows: Auto...
... malfunction by function: H1-Stage 1 Heating. C2-Stage 2 Cooling. Cool changeover valve-operates on a temperature fall (auto changeover). H3-Stage 3 Heating. Each schematic indicates switch operation by being drawn in the system switching (EX: Q674F with OFF-COOL AUTO-HEAT-EM. Key to change mode (EX: Q674L with EM. C3-Stage 3 Cooling. The thermostat automatically changes between heat and cool modes as follows: Auto...
User Guide
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... diagram for T841A1308. 70-6627 • 15 HT. HT. RELAY SYSTEM MONITOR X LACO Y HEAT CHANGEOVER VALVE COMPRESSOR CONTACTOR O COOL CHANGEOVER VALVE CHP M6060A Fig. 16. HT. LED (RED) B RTD 1 RD EM. W2 AUX. HEAT OFF COOL SYSTEM SWITCH 1 POWER SUPPLY. HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE Typical System Hookup Diagrams L1 L2 (HOT) RTD 1 1 ODT...
... diagram for T841A1308. 70-6627 • 15 HT. HT. RELAY SYSTEM MONITOR X LACO Y HEAT CHANGEOVER VALVE COMPRESSOR CONTACTOR O COOL CHANGEOVER VALVE CHP M6060A Fig. 16. HT. LED (RED) B RTD 1 RD EM. W2 AUX. HEAT OFF COOL SYSTEM SWITCH 1 POWER SUPPLY. HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE Typical System Hookup Diagrams L1 L2 (HOT) RTD 1 1 ODT...
User Guide
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...RELAY 2 F AUX. COMPRESSOR MONITOR R OUTDOOR THERMOSTAT X2 T OUTDOOR O THERMISTOR COOL CHANGEOVER RELAY COMPRESSOR CONTACTOR Y 2 FIELD REMOVABLE JUMPER. 3 AUTO FAN IN EMERGENCY HEAT. HEAT OFF COOL 1 POWER SUPPLY. W3 O EM. HEAT RELAY AUX. HEAT PUMP TH ERMOSTAT CROSS REFERENCE/SELECTION GUIDE 9 ...W U AUX. Internal schematic and typical wiring diagram for T841A1712 and T841A1738. HT. HEAT LED (RED) W3 RELAY COOL CHANGEOVER RELAY G R E X AUX. HEAT RELAY B HEAT CHANGEOVER RELAY COMPRESSOR CONTACTOR Y Fig. 18. Fig. 17. PROVIDE DISCONNECT MEANS AND OVERLOAD...
...RELAY 2 F AUX. COMPRESSOR MONITOR R OUTDOOR THERMOSTAT X2 T OUTDOOR O THERMISTOR COOL CHANGEOVER RELAY COMPRESSOR CONTACTOR Y 2 FIELD REMOVABLE JUMPER. 3 AUTO FAN IN EMERGENCY HEAT. HEAT OFF COOL 1 POWER SUPPLY. W3 O EM. HEAT RELAY AUX. HEAT PUMP TH ERMOSTAT CROSS REFERENCE/SELECTION GUIDE 9 ...W U AUX. Internal schematic and typical wiring diagram for T841A1712 and T841A1738. HT. HEAT LED (RED) W3 RELAY COOL CHANGEOVER RELAY G R E X AUX. HEAT RELAY B HEAT CHANGEOVER RELAY COMPRESSOR CONTACTOR Y Fig. 18. Fig. 17. PROVIDE DISCONNECT MEANS AND OVERLOAD...
User Guide
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... REQUIRED. R L1 (HOT) L2 1 X Y1 COMPRESSOR CONTACTOR O COOL CHANGEOVER VALVE M6068A Fig. 19. HT. HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE H1/C1 ANTICIPATOR H1 C1 FALL FAN SWITCH AUTO ON W1 HEAT RELAY 1 W2 HEAT RELAY 2 B HEAT CHANGEOVER VALVE G FAN RELAY H2 ANTICIPATOR H2 FALL SYSTEM SWITCH HEAT OFF COOL 1 POWER SUPPLY. L1 (HOT) L2 1 M1593 70...
... REQUIRED. R L1 (HOT) L2 1 X Y1 COMPRESSOR CONTACTOR O COOL CHANGEOVER VALVE M6068A Fig. 19. HT. HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE H1/C1 ANTICIPATOR H1 C1 FALL FAN SWITCH AUTO ON W1 HEAT RELAY 1 W2 HEAT RELAY 2 B HEAT CHANGEOVER VALVE G FAN RELAY H2 ANTICIPATOR H2 FALL SYSTEM SWITCH HEAT OFF COOL 1 POWER SUPPLY. L1 (HOT) L2 1 M1593 70...
User Guide
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... IS USED. RELAY L EM. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. HEAT RELAY CHECK LED (RED) COMPRESSOR FAULT X2 EM. LED (RED) X COOL CHANGEOVER VALVE O B W1 RELAY W1 HEAT CHANGEOVER VALVE 2 COMPRESSOR CONTACTOR Y1 1 POWER SUPPLY. Internal schematic and typical wiring diagram... and typical wiring diagram for Y594G1419 and Y594G1476. 70-6627 • 18 HT. HT. HT. HT. LED (RED) X AUX. 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 ...
... IS USED. RELAY L EM. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. HEAT RELAY CHECK LED (RED) COMPRESSOR FAULT X2 EM. LED (RED) X COOL CHANGEOVER VALVE O B W1 RELAY W1 HEAT CHANGEOVER VALVE 2 COMPRESSOR CONTACTOR Y1 1 POWER SUPPLY. Internal schematic and typical wiring diagram... and typical wiring diagram for Y594G1419 and Y594G1476. 70-6627 • 18 HT. HT. HT. HT. LED (RED) X AUX. 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 ...
User Guide
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... (RED) G FAN RELAY W 2 U AUX. 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 RELAY W2 FAN RELAY G COOL CHANGEOVER VALVE O COOL E COMPRESSOR EM. L1 (HOT) L2 1 M8700 70-6627 • 19 HT. Fig. 24. Internal schematic and typical wiring diagram for Y594R1763. 2 H1...
... (RED) G FAN RELAY W 2 U AUX. 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 RELAY W2 FAN RELAY G COOL CHANGEOVER VALVE O COOL E COMPRESSOR EM. L1 (HOT) L2 1 M8700 70-6627 • 19 HT. Fig. 24. Internal schematic and typical wiring diagram for Y594R1763. 2 H1...
User Guide
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...• 20 LED (GRN) W2 AUX. HEAT OFF COOL 11 1 POWER SUPPLY. HT. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 REMOVE JUMPER WHEN W1 RELAY IS USED. 3 FACTORY-INSTALLED JUMPER. HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE W3 W3 RELAY H1 ANTICIPATOR... 1 C ANTICIPATOR 2 FAN SWITCH AUTO ON H1 3 C FALL 4 5 H2 ANTICIPATOR H2 6 FALL SYSTEM SWITCH EM. O COOL CHANGEOVER VALVE L COMPRESSOR MONITOR FAN RELAY G R EM...
...• 20 LED (GRN) W2 AUX. HEAT OFF COOL 11 1 POWER SUPPLY. HT. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 REMOVE JUMPER WHEN W1 RELAY IS USED. 3 FACTORY-INSTALLED JUMPER. HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE W3 W3 RELAY H1 ANTICIPATOR... 1 C ANTICIPATOR 2 FAN SWITCH AUTO ON H1 3 C FALL 4 5 H2 ANTICIPATOR H2 6 FALL SYSTEM SWITCH EM. O COOL CHANGEOVER VALVE L COMPRESSOR MONITOR FAN RELAY G R EM...
User Guide
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.... 2 REMOVE JUMPER, WHEN SUPPLIED, FOR SYSTEMS WITH SEPARATE HEATING COMPRESSOR CONTACTOR (W1 SEPARATE FROM Y). Typical wiring diagram for T8611R1000. HT. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 REMOVE JUMPER FOR SYSTEM WITH ISOLATED STAGE 1 HEATING AND COOLING CONNECTIONS. 3 DENOTES THERMOSTAT TO SUBBASE INTERCONNECT. L1 (HOT) L2 1 THERMISTOR SENSOR THERMOSTAT LOGIC STAGE 2 RELAY STAGE 1 RELAY SYSTEM SWITCH EM.
.... 2 REMOVE JUMPER, WHEN SUPPLIED, FOR SYSTEMS WITH SEPARATE HEATING COMPRESSOR CONTACTOR (W1 SEPARATE FROM Y). Typical wiring diagram for T8611R1000. HT. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 REMOVE JUMPER FOR SYSTEM WITH ISOLATED STAGE 1 HEATING AND COOLING CONNECTIONS. 3 DENOTES THERMOSTAT TO SUBBASE INTERCONNECT. L1 (HOT) L2 1 THERMISTOR SENSOR THERMOSTAT LOGIC STAGE 2 RELAY STAGE 1 RELAY SYSTEM SWITCH EM.
User Guide
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... REFERENCE/SELECTION GUIDE L1 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 ... AND OVERLOAD PROTECTION AS REQUIRED. 2 O/B IS FIELD CONFIGURABLE TO SELECT ENERGIZED IN HEATING OR COOLING. (DEFAULT IS ENERGIZED IN HEATING). 3 REMOVE JUMPER, WHEN SUPPLIED, FOR SYSTEMS WITH SEPARATE HEATING COMPRESSOR CONTACTOR (W1 SEPARATE FROM Y1). COMPRESSOR MONITOR TO R OUTDOOR SENSOR C7089B M13281...
... REFERENCE/SELECTION GUIDE L1 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 ... AND OVERLOAD PROTECTION AS REQUIRED. 2 O/B IS FIELD CONFIGURABLE TO SELECT ENERGIZED IN HEATING OR COOLING. (DEFAULT IS ENERGIZED IN HEATING). 3 REMOVE JUMPER, WHEN SUPPLIED, FOR SYSTEMS WITH SEPARATE HEATING COMPRESSOR CONTACTOR (W1 SEPARATE FROM Y1). COMPRESSOR MONITOR TO R OUTDOOR SENSOR C7089B M13281...
User Guide
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... THERMOSTAT CROSS REFERENCE/SELECTION GUIDE Electronic Thermostat (T8011, T8411, T8511, T8611) Sequences of Operation T8011 Programmable Heat Pump Thermostat and T8411 Electronic Heat Pump Thermostat Sequence of Operation. Stage 2 Heat None Stage 1 Heat B, W1, W2, G L L, E, G , Aux Ht indicator Em Ht indicator , Em Ht indicator Auto Em. A loss of operations for Action Energize Terminals Cool Cool None Cooling O O, Y, G Display Icons None Auto Auto Heat Heat None Stage 1 Heat...
... THERMOSTAT CROSS REFERENCE/SELECTION GUIDE Electronic Thermostat (T8011, T8411, T8511, T8611) Sequences of Operation T8011 Programmable Heat Pump Thermostat and T8411 Electronic Heat Pump Thermostat Sequence of Operation. Stage 2 Heat None Stage 1 Heat B, W1, W2, G L L, E, G , Aux Ht indicator Em Ht indicator , Em Ht indicator Auto Em. A loss of operations for Action Energize Terminals Cool Cool None Cooling O O, Y, G Display Icons None Auto Auto Heat Heat None Stage 1 Heat...
User Guide
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... Delay Relay for optional remote sensor, not provided. c Carrier thermostats manufactured by the equipment manufacturer. HONEYWELL REPLACEMENT T841A1001a T841A1001a T874W1031/Q674L1546, Y594W1014 70-6627 • 29 HONEYWELL REPLACEMENT a T841A1316, Y594G1419, T8411, T8511, T8011, T8611 T841A1316...for extended fan operation. HONEYWELL REPLACEMENT T8611G T8611M Y594R1425 T841A1316a Y594G1419 MANUFACTURER MODEL NUMBER Climate Technology Corporation CTC400 CTC403 a Use T8611M or W8900B for hookup details. b See pages 42-45 for 3 heat, 2 cool applications. b Compressor ...
... Delay Relay for optional remote sensor, not provided. c Carrier thermostats manufactured by the equipment manufacturer. HONEYWELL REPLACEMENT T841A1001a T841A1001a T874W1031/Q674L1546, Y594W1014 70-6627 • 29 HONEYWELL REPLACEMENT a T841A1316, Y594G1419, T8411, T8511, T8011, T8611 T841A1316...for extended fan operation. HONEYWELL REPLACEMENT T8611G T8611M Y594R1425 T841A1316a Y594G1419 MANUFACTURER MODEL NUMBER Climate Technology Corporation CTC400 CTC403 a Use T8611M or W8900B for hookup details. b See pages 42-45 for 3 heat, 2 cool applications. b Compressor ...
User Guide
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... can upgrade to cool. - Best of a typical cross reference diagram and the associated footnotes. 70-6627 • 33 This one comfort center controls temperature, indoor air quality, ventilation, humidity, and zoning. Identify heat pump equipment manufacturer and refer to those terminals shown with lines to a deluxe thermostat for first stage heat. - The Honeywell model number is...
... can upgrade to cool. - Best of a typical cross reference diagram and the associated footnotes. 70-6627 • 33 This one comfort center controls temperature, indoor air quality, ventilation, humidity, and zoning. Identify heat pump equipment manufacturer and refer to those terminals shown with lines to a deluxe thermostat for first stage heat. - The Honeywell model number is...
User Guide
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...connect to NC. ¶ LED is energized when terminal is powered. º L terminal is powered continuously when thermostat is in Em. HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE ³ Terminal must be connected to the transformer common. · Terminal is for hookup ...178; When W2 is not used . ƺ Jumper W2 and Y2 if stage 2 heating and cooling are common. ƻ To change fan operation in heating and cooling modes; See specific heat pump manufacturer's listing for multiple auxiliary heat loads such as contactors, sequencers, or relays. » Configure O/B (Select ...
...connect to NC. ¶ LED is energized when terminal is powered. º L terminal is powered continuously when thermostat is in Em. HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE ³ Terminal must be connected to the transformer common. · Terminal is for hookup ...178; When W2 is not used . ƺ Jumper W2 and Y2 if stage 2 heating and cooling are common. ƻ To change fan operation in heating and cooling modes; See specific heat pump manufacturer's listing for multiple auxiliary heat loads such as contactors, sequencers, or relays. » Configure O/B (Select ...
User Guide
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... B O ² X2 ² E Y2 ³ - M13149 TYPICAL THERMOSTATS AND SUBBASES - LED Indication - Heat 2nd Stage Compressor - ´ Y1 W1 - - - - CARRIER USES HONEYWELL Q674L1116 (HH93AZ171) SUBBASE Electromechanical Chronotherm® III Electronic Replacement or Upgrade Chronotherm IV ...X1 X2 » G ¿ O/B ¿ O/B ¾ L E - - For emergency heat LED indication, jumper X2 to transformer common. » Optional CHECK LED on Q674. Ht. Heat C/O Valve O Cool System Monitor/ L System Defrost EM. W2 W2 Y2 Y2 W2 NOT AVAILABLE NOT AVAILABLE Fan G ...
... B O ² X2 ² E Y2 ³ - M13149 TYPICAL THERMOSTATS AND SUBBASES - LED Indication - Heat 2nd Stage Compressor - ´ Y1 W1 - - - - CARRIER USES HONEYWELL Q674L1116 (HH93AZ171) SUBBASE Electromechanical Chronotherm® III Electronic Replacement or Upgrade Chronotherm IV ...X1 X2 » G ¿ O/B ¿ O/B ¾ L E - - For emergency heat LED indication, jumper X2 to transformer common. » Optional CHECK LED on Q674. Ht. Heat C/O Valve O Cool System Monitor/ L System Defrost EM. W2 W2 Y2 Y2 W2 NOT AVAILABLE NOT AVAILABLE Fan G ...
User Guide
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... W2 Fan G G C/O Valve - M13217 TYPICAL THERMOSTATS AND SUBBASES-HONEYWELL MODEL NUMBER T874G1469/Q674F1345 70-6627 • 60 Ht. W2 W2 W2 G G G ³ or B B O/B B ³ or O O O/B O W2 G ³ or B O/B ³ or O O/B ¶ Aux. X1 X2 - ¶ 2nd Stage - - - - - - - - - Cool - - - ³ Configure O/B (select models) in Installer Setup. · Both first stage heat and cool are connected to Y terminal. »...
... W2 Fan G G C/O Valve - M13217 TYPICAL THERMOSTATS AND SUBBASES-HONEYWELL MODEL NUMBER T874G1469/Q674F1345 70-6627 • 60 Ht. W2 W2 W2 G G G ³ or B B O/B B ³ or O O O/B O W2 G ³ or B O/B ³ or O O/B ¶ Aux. X1 X2 - ¶ 2nd Stage - - - - - - - - - Cool - - - ³ Configure O/B (select models) in Installer Setup. · Both first stage heat and cool are connected to Y terminal. »...