Honeywell T841, T8411, Y594, T8511, T8611 User Manual

Heat Pump

Thermostat

&

Cross Reference Selection Guide

Select a Honeywell Heat Pump Thermostat for Peak Performance that Meets Every Heat Pump Demand

Rapid advances in heat pump technology, resulting in high efficiency units and lower operating costs, have made the heat pump a popular choice with consumers. Honeywell heat pump thermostats are ideal for all your heat pump applications and provide the highest level of comfort available. Our thermostats offer consistent control. They optimize desired comfort level and energy savings. Because your customers’ needs vary, we’ve developed the most complete line of heat pump thermostats.

NON-PROGRAMMABLE HEAT PUMP THERMOSTATS

T841 Standard Non-Programmable Thermostat

• Good performance without any “frills”.

• Electromechanical.

• Two heat/one cool; manual changeover.

• Single-piece construction–no subbase required.

• Front test probe access for easy checkout.

Y594 Deluxe Non-Programmable Thermostat

• Proven reliability with excellent temperature control.

• Electromechanical.

• Classic styling.

• Two heat/one cool; automatic or manual changeover.

• Two-piece, front-wired construction for easy installation.

T8411 Standard Electronic Non-Programmable Thermostat

• Microelectronic technology provides precise zero-droop performance.

• Attractive styling complements any décor.

• Two heat/one cool; manual changeover eliminates unexpected system operation.

• Large digital display for quick, easy readability.

• Fan and system switches are located on the lower edge of the thermostat to eliminate accidental setting changes.

T8511 Deluxe Electronic Non-Programmable Thermostat

• Microelectronic technology provides precise zero-droop performance.

• Attractive styling complements any décor.

• Two heat/one cool; automatic or manual changeover.

• Easy-to-read backlit display.

• Most frequently used keys are located by LCD for quick and easy access to information.

• Outdoor temperature display available with optional outdoor temperature sensor.

PROGRAMMABLE HEAT PUMP THERMOSTATS

T8011 Standard Programmable Thermostat

• Microelectronic technology provides precise zero-droop performance.

• Attractive styling complements any décor.

• Two heat/one cool; manual changeover.

• Program up to four time periods and temperature setpoints.

• Large temperature display for quick, easy readability.

• Conveniently sized thermostat with two-piece installation make it easy to install and troubleshoot.

PC8900/W8900B1002 Perfect Climate Comfort Center™ Control System

• Automated, all-in-one comfort control.

• PC8900 Control Panel mounts in living space and accurately measures and controls room temperature and humidity. W8900 Remote Panel mounts near the heating and cooling equipment.

• Optional remote sensors can be used for optimum temperature control.

• Up to three heat/two cool.

• Seven-day (auto copy) programming.

• Large, continuously lit display.

• Simultaneous display of heat and cool setpoints with push of a button.

• Circulation fan setting improves indoor air quality.

T8611 Chronotherm® IV Deluxe Programmable Thermostat

• Microelectronic technology provides precise zero-droop performance.

• Attractive styling complements any décor.

• Two heat/one cool; automatic or manual changeover.

• Seven-day programming.

• COPY key makes programming easier for the installer and the homeowner.

• Easy-to-read backlit display.

• Adaptive Intelligent Recovery™ optimizes heat pump energy savings.

• Outdoor temperature display available with optional outdoor temperature sensor.

HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE

Table of Contents

About This Cross Reference/Selection Guide Heat Pump Thermostat Model Specifications Thermostat Descriptions and General Information Understanding Circuits Typical System Hookup Diagrams Electronic Thermostat (T8011, T8411, T8511, T8611) Sequences of Operation Thermostat Manufacturer Cross Reference Tips for Using This Heat Pump Cross Reference Wiring Connections for Honeywell Heat Pump Thermostats Manufacturer Cross Reference Index

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Index to Figure Diagrams

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About This Cross Reference/Selection Guide

1

2-4

5-12 13-14 15-25 26-28 29-32

33

34-35

36-116

117-118

119

Heat pumps require thermostats with special features. This Cross Reference/Selection Guide contains information about all aspects of selecting a Honeywell replacement thermostat for any heat pump application. Table 1 shows a list of the Honeywell TRADELINE® and SUPER TRADELINE® OS numbers and their specifications. Immediately following the table are more detailed descriptions and related application information. In this section you will find additional information explaining features and requirements that are unique to heat pump thermostat applications. Following the general information section are the internal schematics, wiring diagrams, and sequence of operation information for the electronic thermostats. The Thermostat Manufacturer Cross Reference is listed next. Finally, there is the heat pump manufacturer cross reference, including tips on how to use it. This cross reference, which is organized alphabetically by equipment or thermostat manufacturer, provides the needed information to select and wire any Honeywell heat pump thermostat in new installations and replacement applications.

70-6627 • 1

HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE

Heat Pump Thermostat Model Specifications

Table 1. Model Number Specifications.

Order

Number

T841A1308 TRADELINE®; fixed anticipation. For

use where E and W2 may be jumpered. No auto fan in EM.HT. (Fig. 16).

T841A1555 Replaces T841A1068 and T841A1407,

T841A1530, GE AY28Y078 and AY28Y139. Includes outdoor reset and fixed anticipation on stage 2 heat. Auto fan in EM. HT. (Fig. 17).

T841A1712 SUPER TRADELINE®; for two-stage

heating and one-stage cooling. Fixed anticipation except Stage 2, which is adjustable. Auto fan in EM. HT. (Fig. 18).

T841A1738 Same as T841A1712, except Premier

White™. SUPER TRADELINE®; for two-stage heating and one-stage cooling. Fixed anticipation except Stage 2, which is adjustable. Auto fan in EM. HT. (Fig. 18).

T841B1000 For “No Emergency Heat” applications.

Fixed anticipation except stage 2, which is adjustable. (Fig. 19).

Y594G1161 Includes T874G1204/Q674J1043. With

outdoor reset; replaces GE AY28X077 and AY28X138; no stage 2 heat anticipation. No auto fan in EM. HT. (Fig. 20).

Y594G1419 SUPER TRADELINE®; includes

T874G1642/Q674F1444. Auto fan in EM. HT. (Fig. 22).

Y594G1476 Same as Y594G1419, except Premier

White™; SUPER TRADELINE®. Includes T874G1741/Q674F1477. Auto fan in EM. HT. (Fig. 22).

Y594G1633 TRADELINE®; includes T874G1972/

Q674F1584. No auto fan in EM.HT. Replaces Coleman/Evcon Y594G1377 (Fig. 21).

Y594R1425 SUPER TRADELINE®; includes

T874R1616/Q674L1587. Fixed anticipation. Auto fan in EM. HT. (Fig. 25).

Description Terminals Heat Cool

W2,Y,G,R,

O,B,L,E,X

W,Y,G,R,O,

B,X2,T,F,U

W2,W3,Y,G,

B,O,R,X,E

W2,W3,Y,G,

B,O,R,X,E

W1,W2,Y1,

G,R,O,B,X

W,Y,G,R,O,

X2,T,F,B

W1,W2,W3,

Y1,G,R,O,B,

E,X,X1,X2

W1,W2,W3,

Y1,G,R,O,B,

E,X,X1,X2

W2,Y,G,R,

O,B,E,X,L

W1,W2,W3,

G,Y,R,O,B,

E,X,X2,L

Stages

2 1 EM.HT.-

2 1 HEAT-OFF-

2 1 EM.HT.-

2 1 OFF-

2 1 EM. HT.-

Systems Led

Switch

HEAT-OFF-

COOL

HEAT-OFF-

COOL

HEAT-OFF-

COOL

HEAT-OFF-

COOL

AUTO-OFF

EM.HT.

HEAT-

AUTO-

COOL

EM.HT.

HEAT-

AUTO-

COOL

EM.HT.

HEAT-

AUTO-

COOL

HEAT-OFF-

COOL

Changeover

Manual heat

or cool

Manual cool EM.HT.,

Manual heat

or cool

Manual heat

or cool

Manual heat

or cool

Auto cool AUX.HT.,

Auto heat

or cool

Auto heat

or cool

Auto heat

or cool

Manual heat

or cool

Indication

EM.HT.d,

AUX.HT.

AUX. HT.

EM.HT.,

AUX. HT.

EM.HT.,

AUX. HT.

None

EM.HT.

EM.HT., AUX.HT. CHECK

EM.HT., AUX.HT.

AUX. HT.,

EM. HT., CHECK

(continued)

c

70-6627 • 2

HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE

Table 1. Model Number Specifications (continued).

Order

Number

Y594R1763 TRADELINE®; includes

T874R1954/Q674L1827. Replaces Y594R1136. Auto fan in EM.HT. (Fig. 23).

Y594R1797 Includes T874R1988/Q674L1868.

Replaces Coleman/Evcon Y594R1235. No auto fan in EM.HT. (Fig. 24).

T8611G1004 TRADELINE®; 5-1-1 programming.

Auto fan in EM.HT. (Fig. 26).

T8611G1103 Same as T8611G1004, except Premier

White™; TRADELINE®. 5-1-1 programming. Auto fan in EM.HT. (Fig. 26).

T8611M7008 TRADELINE®; 7 day programming.

Auto fan in EM.HT. (Fig. 27).

T8611R1000 TRADELINE®; 5-1-1 programming.

Auto fan in EM.HT. (Fig. 28).

T8411R1002 TRADELINE®; non-programmable

electronic thermostat. Auto fan in EM.HT. (Fig. 29).

T8411R1028 Same as T8411R1002 except Premier

White™. Auto fan in EM.HT. (Fig. 29).

T8511G1021 TRADELINE®; Deluxe Electronic

Thermostat. Outdoor sensor capability. Auto fan in EM.HT. (Fig. 30).

T8511G1047 Same as T8511G1021 except Premier

White™. Outdoor sensor capability. Auto fan in EM.HT. (Fig. 30).

T8511M1002 TRADELINE®; Deluxe Electronic

Thermostat. Outdoor sensor capability. Auto fan in EM.HT.

T8011R1006 Same as T8011R1014 except Premier

White™. Fixed anticipation except stage 2, which is selectable. (Fig. 29).

T8011R1014 TRADELINE®; program up to four time

periods and temperatures. Fixed anticipation except stage 2, which is selectable. (Fig. 29).

Description Terminals Heat Cool

W,Y,G,R,O,

B,X2,T,F,U

W2,Y,G,R,

O,B,X,E,L

W2,Y,G,R,

C,O,B,E,X1,

X2,L

W2,Y,G,R,

C,O,B,E,X1,

X2,L

W2,W3,Y,Y2,

G,R,C,O,B,

E,X1,X2,L

W1,W2,Y1, G,R,C,O,B,

E,L,P

W1,W2,Y,

G,R,C,L,

E,O,B

W1,W2,Y,

G,R,C,L,

E,O,B

R,C,Y1,W1,

W2,O/B,G, E,L,OT,OT

R,C,Y1,W1,

W2,O/B,G, E,L,OT,OT

R,C,Y1,Y2,

W2,W3,O/B,

G,E,L,OT,OT

R,C,G,W1,

W2,Y,O,

B,E,L

R,C,G,W1,

W2,Y,O,

B,E,L

Stages

Systems Led

Switch

2 1 EM.HT.-

HEAT-OFF-

COOL

AUX.HT.

2 1 EM.HT.-

HEAT-OFF-

COOL

2 1 EM.HT.-

HEAT-OFF-

AUTO-

COOL

2 1 EM.HT.-

HEAT-OFF-

AUTO-

COOL

3 2 EM.HT.-

HEAT-OFF-

AUTO-

COOL

2 1 EM.HT.-

HEAT-OFF-

COOL

2 1 EM.-HT.-

HEAT-OFF-

COOL

2 1 EM.-HT.-

HEAT-OFF-

COOL

2 1 EM.-HT.-

HEAT-OFF-

AUTO-

COOL

2 1 EM.-HT.-

HEAT-OFF-

AUTO-

COOL

3 2 EM.-HT.-

HEAT-OFF-

AUTO-

COOL

2 1 EM.-HT.-

HEAT-OFF-

COOL

2 1 EM.-HT.-

HEAT-OFF-

COOL

Changeover

Indication

Manual cool EM.HT.,

AUX.HT.

Manual cool EM.HT.,

AUX.HT.

Automatic

a

EM.HT.,

AUX. HT.,

CHECK

SYSTEM

Automatic

a

EM.HT.,

AUX.HT.,

CHECK

SYSTEM

Automatic

a

EM.HT.,

AUX.HT.,

CHECK

SYSTEM

Manual EM.HT.d,

AUX.HT.

SYSTEM

Manual None

Automatic

a

CHECKc

Manual None

(continued)

c

b

c

b

c

b

70-6627 • 3

HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE

Table 1. Model Number Specifications (continued).

Order

Number

T8611G2002 TRADELINE®; Full seven-day program

capability. Programmable fan and back lighting features. (Fig. 31).

Description Terminals Heat Cool

Y1,W1,W2,

G,E,L,R,C,

O/B,X1,X2,

OT,OT

T8611G2028 Same as T8611G2002 except Premier

White™, 7-day program capability. Programmable fan and back lighting features. (Fig. 31).

T8611M2017 TRADELINE®; full 7-day program

capability. Programmable fan and back lighting features.

Y1,W1,W2,

G,E,L,R,C,

O/B,X1,X2,

OT,OT

Y1,Y2/W2, W3,G,E,L,

R,O/B,C,X1,

X2,OT,OT

T8611M2025 Same as T8611M2017 except Premier

White™, 7-day program capability. Programmable fan and back lighting features.

PC8900A1007/ W8900B1002

TRADELINE®; Perfect Climate Comfort Center™ Control System. 7-day (auto copy) programming.

Y1,Y2,W2,

W3,G,E,L,R,

O/B,C,X1, X2,OT,OT

R,C,RH,Y1/

W1,G,O/B, AUX,E,Y2,

W2,L

a

I

n freezing climates, be sure the cooling compressor has adequate cold start protection.

b

SYSTEM LED lights when heating or cooling equipment is running.

c

CHECK LED indicates compressor malfunction.

d

EM. HT. LED indicates compressor malfunction.

e

CHECK LED comes on when 24 Vac is applies to the L terminal.

f

FAIL LED come on when a complete cirucuit is made on the X1 and X2 terminals.

g

CHECK LED lights to alert homeowner to HVAC maintenance or service needs.

Stages

Systems Led

Switch

2 1 EM.HT.-

HEAT-OFF-

AUTO-

COOL

2 1 EM.HT.-

HEAT-OFF-

AUTO-

COOL

3 2 EM.HT.-

HEAT-OFF-

AUTO-

COOL

3 2 EM.HT.-

HEAT-OFF-

AUTO-

COOL

3 2 EM.HT.-

HEAT-OFF-

AUTO-

COOL

Changeover

Automatic

a

Indication

CHECK

f

FAIL

CHECK

f

FAIL

CHECK

f

FAIL

CHECK

f

FAIL

CHECK

SYSTEM

e

g

b

70-6627 • 4

HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE

Thermostat Descriptions and General Information

This section describes some of the heat pump thermostats that Honeywell manufactures. Since heat pumps require thermostats with special features such as control of changeover valves, this section also explains some of the features and requirements unique to heat pump thermostat applications.

Electromechanical Heat Pump Thermostats

T841 Heat Pump Thermostats

The T841 models control two-stage heat and one-stage cool in heat pump systems, using manual changeover. Heat anticipators are either adjustable or fixed; cooling anticipator is fixed. T841A models include up to three LED indicator lights; T841B models include up to two LED indicator lights. Provision for an outdoor reset to improve thermal performance is also available on select models.

Y594 Combination Packs for Heat Pump Applications

The Y594 Packs combine the appropriate T874 Multistage Thermostat and the Q674 Subbase for specific heat pump applications. Y594G models have automatic changeover; Y594R model has manual changeover. Heat anticipators are either adjustable or fixed; cooling anticipator is fixed. Accessories include tamper-resistant cover and locking lever assembly with thermometer, locking lever stops, outdoor thermistor, TG504 Key Lock® Cover, and the TG511 Versaguard™ Universal Thermostat Guard.

Outdoor Reset

Some heat pump thermostats apply outdoor reset to minimize the effect of the interstage differential. It takes more than a one-degree change in temperature to initiate the second stage of heating. Added to a certain amount of droop under high loads, there can be a fairly large offset between the setpoint temperature and the room temperature. To correct this difference, an outdoor thermistor is used.

In warm weather, the outdoor thermistor has a very low resistance, permitting a large amount of current to flow in the heater. This reduces the call for second stage heating.

In cool weather, the outdoor thermistor has a very high resistance, permitting a small amount of current to flow in the heater. When this happens, calls for second stage heating are more frequent. This helps reduce the difference between the setpoint temperature and the room temperature.

Select one of the following T841 or Y594 models if a thermostat with outdoor reset capability is required:

T841A1555 Y594G1161

Y594R1763 If an outdoor thermistor is not provided, use the Honeywell C815A Outdoor Thermistor, ordered separately. NOTE: All Honeywell

electronic

heat pump thermostats are droopless controls and do not require the use of outdoor reset.

Electronic Non-programmable Heat Pump Thermostats

T8411 Electronic Heat Pump Thermostats

The T8411 models control two-stage heat and one-stage cool in heat pump systems, using manual changeover only. First stage heat anticipation is fixed; second stage heat anticipation is selectable at 3, 6, or 9 cph. Setpoints are permanently held in memory (no batteries required) and retained during power failures. Electronic thermostats provide droopless temperature control.

70-6627 • 5

HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE

T8511 Deluxe Electronic Heat Pump Thermostats

The T8511 models control two-stage heat and one-stage cool in heat pump systems, using manual or automatic changeover. First stage heat anticipation is fixed; second stage heat anticipation is selectable at 3, 6, or 9 cph. Setpoints are permanently held in memory (no batteries required) and retained during power failures. Electronic thermostats provide droopless temperature control. The T8511 models also include a backlit display and outdoor sensing capability.

Electronic Programmable Heat Pump Thermostats

T8011 Standard Electronic Heat Pump Thermostats

The T8011 models provide two-stage heat and one-stage cool control for heat pump systems, using manual changeover. First stage heat anticipation is fixed; second stage heat anticipation is selectable at 1, 3, 6, or 9 cph. The user can program up to four time periods and temperature setpoints. All programs and setpoints are permanently held in memory in the event of a power outage. Electronic thermostats provide droopless temperature control.

Chronotherm® III Electronic Heat Pump Thermostats

The T8611 Chronotherm III models provide up to three-stage heat and two-stage cool control for heat pump systems, using manual or automatic changeover. Models are available with selectable daily schedules for weekdays, Saturday, and Sunday; or full 7-day programming. Models include LED indication for system operation and status. Battery backup, with low battery indication, maintains clock and memory during power outages. Adjustable second stage cycling allows for use of the thermostat with electric heat or fossil fuel while providing optimum comfort.

Using the Chronotherm III or Chronotherm IV T8611M on Two-Speed Heat Pump Compressor Equipment

The T8611M is a three-stage heat/two-stage cool thermostat used to control multistage heat pump equipment. However, there is no difference in controlling multistage equipment and in controlling two-speed multistage equipment. The differential required between stage 1 and stage 2 in multistage equipment is the same as the differential required between low-speed and high-speed in two-speed equipment.

To connect the T8611M to two-speed heat pump equipment:

1. Connect the Y terminal to the low-speed compressor terminal.

2. Jumper the Y2 and W2 terminals.

3. Connect the Y2 terminal to the high-speed compressor terminal.

4. Connect all other terminals as shown in the wiring diagram below.

5. Configure the O/B terminal for changeover in either heating or cooling.

Equipment Function

Transformer Common

Power

Cooling Changeover Heating Changeover

1st Stage Compressor

2nd Stage Compressor

Fan

a

Equipment Terminals

C C

RR GG OO or BB or YY

Y2 Y2

T8611M

Terminals

O/B

a

W2

70-6627 • 6

Third Stage Heat

Emergency Heating

Fig. 1. Using the T8611M on two-speed heat pump compressor equipment.

a

On selected T8611M models, the high speed compressor is wired to the Y2 terminal. In these cases, no jumper is required.

W3 W3

EE

M13229

HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE

Chronotherm IV Electronic Deluxe Heat Pump Thermostats

The T8611 Chronotherm IV thermostat models provide up to three-stage heat and two-stage cool control for heat pump systems, using manual or automatic changeover. These models provide full 7-day programming capability. Models with programmable fan operation are available for homeowner comfort. Backlighting on the large display makes the LCD very easy to read. Adaptive Intelligent Recovery™ control brings the room temperature to the desired temperature setpoint at the programmed time, maximizing comfort and energy savings. First stage heat anticipation is fixed; second stage heat anticipation is selectable.

Adaptive Intelligent Recovery™ Control (Night Setback and Heat Pumps)

Heat pump applications are ideal for night setback and energy savings. However, in order to maximize the energy saved in a night setback mode, use the T8611 Chronotherm® III or T8611 Chronotherm® IV Thermostats with Adaptive Intelligent Recovery™ control.

Adaptive Intelligent Recovery™ control assures that the comfort setting is achieved at the programmed time regardless of weather conditions. Conventional recovery starts recovery at the beginning of the programmed time period and uses the equipment to achieve the comfort settings as soon as possible.

Unlike the Chronotherm mode in the Chronotherm IV thermostat. Honeywell does not recommend this because the auxiliary heat comes on when the program time begins, and runs continuously until the setpoint is reached.

III models, the Adaptive Intelligent Recovery control can be turned off in the Installer Set-up

Applications Requiring Special System Hookups

Using a Chronotherm III T8611G or T8611M on Systems Requiring Separate W1 and Y Terminals

The Chronotherm III T8611G and T8611M are designed with only one common compressor terminal. The Y terminal is energized on a call for stage 1 heat and stage 1 cool. However, some multistage heat pump equipment requires one terminal to be energized on a call for stage 1 heat (W In order for the T8611G or T8611M to accommodate this requirement, a separate switching relay must be added to the installation. See the following wiring diagrams for heat pumps that provide changeover in the heating mode and for heat pumps that provide changeover in the cooling model.

Heat Pumps with Heating Mode Changeover

Here is how the switching relay allows the system to work properly: * The Y terminal is connected to the equipment terminal W1 through the normally closed contacts on the R8222B

Switching Relay. When the thermostat calls for heat, the thermostat Y terminal activates the first stage of heating.

* The O terminal is connected to the coil terminals on the R8222B Switching Relay. When the system switch is in the

COOL position, the O terminal is energized, reversing the logic of the Chronotherm III T8611G and T8611M Y terminal. Now when the thermostat calls for cooling, the Y terminal activates the first stage of cooling.

) and one terminal to be energized on a call for stage 1 cool (Y1).

1

70-6627 • 7

HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE

Fan

Equipment

Terminals

RR Y1 Y2 Y2

GG W1 W2 W2

CC

BB

Equipment Function

Power

1st Stage Cool

2nd Stage Cool

1st Stage Heat

2nd Stage Heat

Transformer Common

Heating Changeover

Fig. 2. Installing an R8222B Switching Relay on heat pumps requiring heating mode changeover.

Heat Pumps with Cooling Mode Changeover

Here is how the switching relay allows the system to work properly: * The Y terminal is connected to the equipment terminal Y1 through the normally closed contacts on the R8222B

Switching Relay. When the thermostat calls for cooling, the thermostat Y terminal activates the first stage of cooling.

T8611M

Terminals

Y

O

R8222B Relay

M13231

* The B terminal is connected to the coil terminals of the R8222B Switching Relay. When the system switch is in the

HEAT position, the B terminal is energized, reversing the logic of the Chronotherm® III T8611G and T8611M Y terminal. Now when the thermostat calls for heating, the Y terminal activates the first stage of heating.

Equipment Function

Power

1st Stage Cool

2nd Stage Cool

Fan

1st Stage Heat

2nd Stage Heat

Transformer Common

Cooling Changeover

Equipment

Terminals

RR Y1 Y2 Y2

GG

W1 W2 W2

CC

OO

R8222B Relay

T8611M

Terminals

Y

B

M13230

70-6627 • 8

Fig. 3. Installing an R8222B Switching Relay on heat pumps requiring cooling mode changeover.

HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE

Changing Fan Operation in Emergency Heat Mode for Electronic Thermostats

In the emergency heat mode (system switch in EM. HT. position), the thermostat controls the fan operation with a call for first stage heat. This means that when the thermostat calls for heat, the thermostat also calls for fan operation. However, this fan operation is not desirable on some types of systems.

To change the fan operation on the TRADELINE and SUPER TRADELINE models, follow the wiring diagram shown below. Connecting the thermostat and relay to the equipment in this manner disables the fan switch in the emergency heat mode. During normal operation, the fan switch is enabled and the fan operation is as described in the installation instructions.

R (Power)

E C (Common)

E (EM. Heat)

G G (Fan)

Thermostat

Fig. 4 Changing fan operation in emergency heat mode for electronic thermostats.

R8222B Relay

Equipment

M13232

Heat Pump Manufacturer Relay Wiring Connections

The wiring connections for some thermostats to specific types of heat pump equipment require a separate relay for proper operation. Refer to Fig. 5 through 13 for the wiring connections of these types of equipment.

Equipment Function

Transformer Common

1st Stage Cooling

1st Stage Heating

Existing Control

Terminal Designation

CC

Y1

W1

New T erminal

Designation

Y

O

M13235

Fig. 5. Relay wiring connections for Carrier equipment (typical 38BQ), and T8511M, T8611M,

PC8900/W8900B1002. Require relay (R8222B1067 typically) for proper operation.

70-6627 • 9

HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE

Equipment Function

Common

Power

Existing Control

Terminal Designation

Black

Red

New T erminal

Designation

C

R

Emergency Heat

AL

E

M13241

Fig. 6. Relay wiring connections for Evcon/Coleman equipment (3200, 3300). Requires R8222B1067

Relay to operate system. Equipment requires normally energized emergency heat.

Equipment Function

Common

Existing Control

Terminal Designation

Black

New T erminal

Designation

C or X

Power

Emergency Heat

Red

A

R

E

M13236

Fig. 7. Relay wiring connections for Evcon/Coleman equipment (3200, 3300, 3360, 3400, 6000, and 6500).

Requires R8222B1067 Relay to operate system. Equipment requires normally energized emergency heat.

Equipment Function

Indoor Power

System Monitor

Existing Control

Terminal Designation

VR

L

New T erminal

Designation

R

or

X1

L

M13237

Fig. 8. Relay wiring connections for Lennox equipment (HP9, HP10). Requires R8222B1067 Relay to operate the

system monitor light (emergency heat LED) on TRADELINE replacement thermostats. Tape off if light is not desired.

70-6627 • 10

HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE

Equipment Function

Power

System Monitor

Existing Control

Terminal Designation

VR

L

New T erminal

Designation

R

or

X1

L

F

M13238

Fig. 9. Relay wiring connections for Lennox equipment (HP16, HP19, HP21, HP22 Direct Replacements).

Requires R8222B1067 Relay to operate the system monitor light (emergency heat LED) on

TRADELINE replacement thermostats. Tape off if light is not desired.

Equipment Function

Power

System Monitor

Existing Control

Terminal Designation

RR

X1

New T erminal

Designation

or

L

X1

M13239

Fig. 10. Relay wiring connections for Magic Chef equipment (PE Series). Requires R8222B1067 Relay

if outdoor section has reset shunt relay and malfunction light indicator is desired on thermostat.

Equipment Function

Power

System Monitor

Existing Control

Terminal Designation

R1

or R R

L or X

New T erminal

Designation

or

X1

L

M13240

Fig. 11. Relay wiring connections for Mammoth. Requires R8222B1067 Relay if outdoor

section has reset shunt relay and malfunction light indicator is desired on thermostat.

70-6627 • 11

HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE

Equipment Function

Transformer Common

Power

Fan

Equipment

Terminals

CC RR GG

PC8900

Terminals

O/B 1st Stage Heating 1st Stage Cooling

Changeover V alv e

2nd Stage Heating

Emergency Heat

2nd Stage Cooling

W1 Y1/W1

Y1

B

W2 Aux.

EE

Y2 Y2

M13233

Fig. 12. Relay wiring connections for PC8900 in heat pump applications

requiring separate Y

Equipment Function

Transformer Common

and W1 terminals with a heating changeover.

1

Equipment

Terminals

PC8900

Terminals

CC

Power

Fan

RR GG

O/B

1st Stage Cooling

1st Stage Heating

Changeover V alv e

2nd Stage Heating

Emergency Heat

2nd Stage Cooling

Y1 Y1/W1

W1

O

W2 Aux.

EE

Y2 Y2

Fig. 13. Relay wiring connections for PC8900 in heat pump applications

requiring separate Y1 and W1 terminals with a cooling changeover.

M13234

70-6627 • 12

HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE

Understanding Circuits

To understand wiring diagrams, it is important to know what all the symbols mean and how to trace the path of the circuits from the transformer. Circuit descriptions and terminology are defined as follows:

Auto changeover—refers to the presence of an AUTO position in the system switching (EX: Q674F with OFF-COOL

AUTO-HEAT-EM. HEAT switching). The thermostat automatically changes between heat and cool modes as indoor temperature changes.

Manual changeover—requires a system switch movement to change mode (EX: Q674L with EM. HT.-HEAT-OFF-

COOL switching).

Cool changeover valve—operates on cooling. The reversing valve or relay is activated either by moving the system

switch to COOL (manual changeover) or by a mercury switch that makes on a temperature rise (auto changeover).

Heat changeover valve—operates on heating. The reversing valve or relay is activated either by moving the system

switch to HEAT (manual changeover) or by a mercury switch that makes on a temperature fall (auto changeover).

System monitor relay—optional equipment on some heat pumps. This system monitor relay detects a malfunction in

the compressor and indicates the malfunction by activating the EMERGENCY HEAT LED on the switching subbase. The system monitor relay may be wired to the L terminal on some thermostats

Each mercury switch is identified by function:

H1—Stage 1 Heating. H2—Stage 2 Heating. H3—Stage 3 Heating. C1—Stage 1 Cooling. C2—Stage 2 Cooling. C3—Stage 3 Cooling.

C/O—Changeover (heat pumps). Each anticipator is identified and each switch affected is named (EX: H1 anticipator, C1 anticipator). All T874 Multistage Thermostats use mercury switches. Each schematic indicates switch operation by being drawn

in the open position with an arrow indicating operation with a temperature RISE or FALL.

KEY TO HOOKUP SYMBOLS

TRANSFORMER (24 VAC SECONDARY)

RELAY OR CONTACTOR COIL

MERCURY SWITCH

FIXED ANTICIPATOR HIGH RESISTANCE (TYPICALLY 5 KILOHMS)

ADJUSTABLE ANTICIPATOR LOW RESISTANCE (TYPICALLY 0 TO 5 OHMS)

RELAY/CONTACTOR CONTACTS

B

TERMINAL

LED

ODT

OUTDOOR THERMOSTAT

EHR

EMERGENCY HEAT RELAY

RTD

TIME DELAY RELAY

RD

DEFROST RELAY

CHP

PRESSURE SWITCH

LACO

LOW AMBIENT CUTOFF

M5848

Fig. 14. Key to hookup symbols.

70-6627 • 13

HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE

NEMA Standard Transformers Give You Better Control

UL sets the safety standards all transformers must meet. But these are minimum standards. The Honeywell AT20A, AT40A, AT72D and AT87A Transformers do even more; they meet tough voluntary standards of the National Electrical Manufacturer’s Association (NEMA).

Why is this so important? Because today’s sophisticated control systems require reliable, accurate voltage output for optimal system performance. It’s especially important for electrical controls (OEM boards in high efficiency furnaces, for example) or resistive heaters, such as thermostat heat anticipators.

For better performance, some heat pumps require a NEMA standard transformer. Conformance to NEMA standards assures the voltage output of a transformer will remain within acceptable limits, regardless of load conditions. No excessively high open-circuit voltage under light load conditions. No low, “brown-out” voltage levels under heavy load conditions. At 100% load, the transformer secondary must supply between 23 and 25 volts to meet the NEMA standard.

How can you tell that the transformers you buy meet this tough, high standard? Look for the transformer to be marked: NEMA Type B (20VA), NEMA Type D (40VA), NEMA Type E (48-50 VA). Only transformers conforming to the NEMA standard can be marked in this way. The following are recommended Honeywell NEMA standard transformers: AT72D1691, AT72D1683, AT87A1106

27 26 25 24 23

22

21 20 19

18

SECONDARY VOLTAGE

17 16 15

14

0 50 100 150

% OF LOAD

200

M993

Fig. 15. NEMA Class 2 transformer band.

70-6627 • 14

HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE

Typical System Hookup Diagrams

L1 (HOT)

L2

2

EM. HT.

HEAT

COOL

SYSTEM SWITCH

FAN SWITCH

AUTO

OFF

H1

H2

C1

FALL

H1/C1 ANTICIPATOR

H2 ANTICIPATOR

FALL

1

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

NO AUTO FAN IN EMERGENCY HEAT.

2

ON

G

R

W2

AUX. HT. LED (GREEN)

E

L

EM. HT. LED (RED)

B

X

Y

O

RTD 1

LACO CHP

COOL CHANGEOVER VALVE

ODT 1

EHR 1

ODT 2

EHR 2

RD

SYSTEM MONITOR

HEAT CHANGEOVER VALVE

COMPRESSOR CONTACTOR

1

RTD 2

RTD 3

FAN RELAY

RTD 1

EM. HT. RELAY

M6060A

Fig. 16. Internal schematic and typical wiring diagram for T841A1308.

70-6627 • 15

HEAT PUMP TH ERMOSTAT CROSS REFERENCE/SELECTION GUIDE

9

H1

C1

FALL

C ANTICIPATOR

H1/C ANTICIPATOR

H2

FALL

RESET

1

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

2

FIELD REMOVABLE JUMPER. AUTO FAN IN EMERGENCY HEAT.

3

2

3

5

8

11

12

10

1

4

Fig. 17. Internal schematic and typical wiring diagram for T841A1555.

FAN SWITCH

AUTO

ON

SYSTEM SWITCH

3

EM. HT.

HEAT

OFF

COOL

AUX. HEAT LED (GREEN)

EM. HEAT LED (RED)

G

FAN RELAY

W

2

U

B

F

COMPRESSOR MONITOR

R

OUTDOOR THERMOSTAT

X2

T

O

COOL CHANGEOVER RELAY

Y

AUX. HEAT RELAY

OUTDOOR THERMISTOR

COMPRESSOR CONTACTOR

M8728

L1 (HOT)

L2

1

FALL

H1

C1

10

5

H1 ANTICIPATOR

C1 ANTICIPATOR

7

8

2

3

9

6

12

H2 ANTICIPATOR

H2

FALL

1

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

11

FAN SWITCH

AUTO

ON

SYSTEM SWITCH

EM. HT.

HEAT

OFF

COOL

EM. HEAT LED (RED)

AUX. HEAT LED (GRN)

W3

O

G

R

E

X

W2

B

Y

COOL CHANGEOVER RELAY

FAN RELAY

EM. HEAT RELAY

HEAT CHANGEOVER RELAY

W3 RELAY

AUX. HEAT RELAY

COMPRESSOR CONTACTOR

M13249

L2 L1

(HOT)

1

70-6627 • 16

Fig. 18. Internal schematic and typical wiring diagram for T841A1712 and T841A1738.

HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE

H1/C1 ANTICIPATOR

H1

1

C1

FALL

FAN SWITCH

AUTO

ON

SYSTEM SWITCH

H2 ANTICIPATOR

H2

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

FALL

HEAT

OFF

COOL

Fig. 19. Internal schematic and typical wiring diagram for T841B1000.

W1

HEAT RELAY 1

W2

HEAT RELAY 2

B HEAT CHANGEOVER

VALVE

G

FAN RELAY

R

X

Y1

COMPRESSOR CONTACTOR

O

COOL CHANGEOVER VALVE

M6068A

L1 (HOT)

L2

1

H2

FALL

CHANGEOVER

FALL

H1

H1 ANTICIPATOR

RISE

C1

RESET HEATER

C1 ANTICIPATOR

RISE

FAN SWITCH

AUTO

ON

SYSTEM SWITCH

EM .HT.

AUTO

OFF

1

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

T

G

O

R

X2

W

AUX. HT. LED (GREEN)

B

EM. HT. LED (RED)

F

Y

OUTDOOR THERMOSTAT

CHANGEOVER VALVE

C815A OUTDOOR THERMISTOR

FAN RELAY

AUX. HT. RELAY

L1 (HOT)

L2

M1593

1

Fig. 20. Internal schematic and typical wiring diagram for Y594G1161.

70-6627 • 17

HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE

FALL

H1

CO

H1

RISE

H1 ANTICIPATOR

H2 ANTICIPATOR

FALL

H2

RISE

C1

C1 ANTICIPATOR

RISE

1

2

4

6

8

9

10 11

12

FAN SWITCH

AUTO

ON

SYSTEM SWITCH

OFF

EM. HT.

HEAT

AUTO

COOL

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND

1

OVERLOAD PROTECTION AS REQUIRED.

Fig. 21. Internal schematic and typical wiring diagram for Y594G1633.

1

CHANGEOVER (HEAT)

FALL

CHANGEOVER (COOL)

C1

1

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

2

W1 - Y1 JUMPER IS Y TERMINAL; REMOVE JUMPER WHEN W1 RELAY IS USED.

H2

H2 ANTICIPATOR

RISE

C1 ANTICIPATOR

H1 ANTICIPATOR

2

3

4

5

6

8

9

10

11

FAN SWITCH

AUTO ON

SYSTEM SWITCH

OFF EM. HT. HEAT

AUTO

COOL

O

G

B

R

E

L

EM. HT. LED (RED)

X

AUX. HEAT LED (GREEN)

W2

Y

AUX. HT. LED (GREEN)

EM. HT. LED (RED)

COOL CHANGEOVER VALVE

B RELAY

EM. HT. RELAY

AUX. HEAT RELAY

W3

G

FAN RELAY

R

W2

EM. HT. RELAY

E

X1

CHECK LED (RED)

X2

X

O

B

W1

2

Y1

COMPRESSOR FAULT

COOL CHANGEOVER VALVE

W1 RELAY

COMPRESSOR CONTACTOR

FAN RELAY

COMPRESSOR CONTACTOR

M8702

W3 RELAY

AUX. HEAT RELAY

HEAT CHANGEOVER VALVE

1

L2 L1

(HOT)

1

L1 (HOT)

L2

M8703

70-6627 • 18

Fig. 22. Internal schematic and typical wiring diagram for Y594G1419 and Y594G1476.

HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE

1

2

H1

C1

FALL

H2

FALL

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND

1

OVERLOAD PROTECTION AS REQUIRED. FIELD REMOVABLE JUMPER.

2

3

4

5

6

11

AUTO

ON

SYSTEM SWITCH

EM. HEAT

HEAT

OFF

COOL

FAN SWITCH

AUX. HEAT LED (GREEN)

EM. HEAT LED (RED)

G

FAN RELAY

W

2

U

B

COMPRESSOR MONITOR

F

R

T

X2

OUTDOOR THERMOSTAT

O

COMPRESSOR CONTACTOR

Y

AUX. HEATER RELAY

OUTDOOR SENSOR

COOL CHANGEOVER VALVE

M8701

1

L1 (HOT)

L2

Fig. 23. Internal schematic and typical wiring diagram for Y594R1763.

2

H1 AND C1 ANTICIPATOR

3

H1

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

1

FALL

C1

H2 ANTICIPATOR

H2

4

6

FAN SWITCH

AUTO

ON

SYSTEM SWITCH

EM. HT.

HEAT

OFF

COOL

R

L

EM. HEAT LED (RED)

X

AUX. HEAT LED (GRN)

W2

G

O

E

Y

B

Fig. 24. Internal schematic and typical wiring diagram for Y594R1797.

FAN RELAY

COOL CHANGEOVER VALVE

EM. HEAT RELAY

AUX. HEAT RELAY

COMPRESSOR CONTACTOR

"B" RELAY

M8700

L1 (HOT)

L2

1

70-6627 • 19

HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE

H1

H1 ANTICIPATOR

C ANTICIPATOR

C

FALL

H2 ANTICIPATOR

H2

FALL

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD

1

PROTECTION AS REQUIRED.

2

REMOVE JUMPER WHEN W1 RELAY IS USED.

3

FACTORY-INSTALLED JUMPER.

1

2

3

4

5

6

11

FAN SWITCH

AUTO

ON

SYSTEM SWITCH

EM. HT.

HEAT

OFF

COOL

EM. HT. LED (RED)

AUX. HT. LED (GRN)

W3

O

L

G

R

W2

AUX. HT. RELAY

E

EM. HT. RELAY

X

3

HEAT

X2

CHANGEOVER VALVE

B

W1 RELAY

W1

COMPRESSOR

2

CONTACTOR

Y

W3 RELAY

COOL CHANGEOVER VALVE

COMPRESSOR MONITOR

FAN RELAY

M8713

L1 (HOT)

L2

1

Fig. 25. Internal schematic and typical wiring diagram for Y594R1425.

70-6627 • 20

HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE

2

L1 (HOT)

L2

POWER SUPPLY

FAN SWITCH

ON

THERMOSTAT LOGIC CIRCUIT

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD

1

PROTECTION AS REQUIRED.

2

DENOTES THERMOSTAT TO SUBBASE INTERCONNECT.

3

POSSIBLE CHECK LED CIRCUITS:

X1

CHECK LED (YELLOW)

X2

SWITCH TO R (POWER) SIDE OF SYSTEM TRANSFORMER

SUBBASE LOGIC/ CONTROL CIRCUIT

FAULT DETECTION SWITCH

HIGH LIMIT

TO R

TO C/X

AUTO

SYSTEM SWITCH

EM. HT.

HEAT

OFF

AUTO

COOL

HEAT 1

X1

CHECK LED (YELLOW)

SWITCH TO C (COMMON) SIDE OF SYSTEM TRANSFORMER

FAULT DETECTION SWITCH

X2

HIGH LIMIT

EM. HT. LED (RED)

TO R

CHECK LED (YELLOW)

TO C/X

SWITCH IN SECONDARY OF SEPARATE TRANSFORMER

COOL

X1

X2

AUX. HT. LED (GREEN)

HEAT 2

C. O.

CHECK LED (YELLOW)

SWITCHING DEVICE

24 VAC

R

C/X

L

MONITOR

W2

G

EM. HT. RELAY

E

COOL CHANGEOVER VALVE

O

HEAT CHANGEOVER VALVE

B

Y

X1

3

X2

M6020A

AUX. HT. RELAY

FAN RELAY

COMPRESSOR CONTACTOR

L1 (HOT)

L2

1

Fig. 26. Typical wiring diagram for T8611G1004 and T8611G1103.

70-6627 • 21

HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE

THERMOSTAT LOGIC CIRCUIT

S1 S1

S2 S2

S3 S3

200905 REMOTE

6

SENSOR

POWER SUPPLY

SUBBASE LOGIC/ CONTROL CIRCUIT

R

HIGH LIMIT

FAN SWITCH

ON

AUTO

HEAT 1

HIGH LIMIT

5

EM. HT. LED (RED)

SYSTEM SWITCH

EM. HT.

HEAT OFF AUTO

COOL

COOL 1

HEAT 3

4

C

AUX. HT. LED (GREEN)

L

MONITOR

W3

W2

HEAT 2

E

G

C. O.

O

C. O.

B

STAGE 1 COMPRESSOR CONTACTOR

Y

STAGE 2 COMPRESSOR CONTACTOR

Y2

COOL 2

X1

CHECK LED (YELLOW)

X2

3

AUX. HT. RELAY

STAGE 2 RELAY

EM. HT. RELAY

FAN RELAY

COOL CHANGEOVER VALVE

HEAT CHANGEOVER VALVE

2

L1 (HOT)

L2

1

70-6627 • 22

1

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. POSSIBLE CHECK LED CIRCUITS:

2

X1

CHECK LED (YELLOW)

3 4 5 6

FAULT DETECTION SWITCH

X2

SWITCH TO R (POWER) SIDE OF SYSTEM TRANSFORMER

SOME OLDER HEAT PUMP THERMOSTATS USE X FOR COMMON TERMINAL. NOMINAL 24 VAC POWER MUST BE PRESENT BETWEEN R AND C TERMINALS FOR THERMOSTAT OPERATIONS. AVAILABLE ONLY ON MODLES WITH SEPARATE SENSOR FOR REMOTE TEMPERATURE SENSING. RECOMMENDED INTERCONNECT CABLE: 18-GAUGE THERMOSTAT CABLE, 200 FT. (61 M) MAXIMUM LENGTH.

ROUTE INTERCONNECT CABLE AWAY FROM SOURCES OF ELECTRICAL NOISE.

TO R

TO C

X1

CHECK LED (YELLOW)

SWITCH TO C (COMMON) SIDE OF SYSTEM TRANSFORMER

FAULT DETECTION SWITCH

X2

TO R

CHECK LED (YELLOW)

TO C

SWITCH IN SECONDARY OF SEPARATE TRANSFORMER

X1

X2

SWITCHING DEVICE

24 VAC

Fig. 27. Typical wiring diagram for T8611M7008.

L1 (HOT)

L2

M2656

HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE

POWER SUPPLY

3

FAN

HIGH LIMIT

SYSTEM SWITCH

EM. HT.

HEAT

OFF

COOL

SWITCH

ON

AUTO

THERMOSTAT LOGIC CIRCUIT

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

1

REMOVE JUMPER FOR SYSTEM WITH ISOLATED STAGE 1 HEATING AND COOLING CONNECTIONS.

2

DENOTES THERMOSTAT TO SUBBASE INTERCONNECT.

3

SUBBASE LOGIC/ CONTROL CIRCUIT

HIGH LIMIT

COOL 1

EM. HT. LED (RED)

HEAT 1

R

C

AUX. HT. LED (GREEN)

L

W2

HEAT 2

E

W1

G

O

B

Y1

P

MONITOR

EM. HT. RELAY

FAN RELAY

COOL

2

CHANGEOVER VALVE

HEAT CHANGEOVER VALVE

AUX. HT. RELAY

STAGE 1 HEAT RELAY

COMPRESSOR CONTACTOR

DEFROST CONTROL

M6019A

L1 (HOT)

L2

1

Fig. 28. Typical wiring diagram for T8611R1000.

THERMISTOR SENSOR

1 2

THERMOSTAT LOGIC

POWER SUPPLY

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. REMOVE JUMPER, WHEN SUPPLIED, FOR SYSTEMS WITH SEPARATE HEATING COMPRESSOR CONTACTOR (W1 SEPARATE FROM Y).

STAGE 2 RELAY

STAGE 1 RELAY

FAN SWITCH

ON

AUTO

SYSTEM SWITCH

EM. HT.

HEAT

OFF

COOL

R

AUXILARY HEAT RELAY

W2

L

CHANGEOVER VALVE HEAT

B

O

COMPRESSOR CONTACTOR

Y

2

W1

EMERGENCY HEAT RELAY

E

G

C

RELAY

CHANGEOVER VALVE COOL

COMPRESSOR CONTACTOR HEAT

FAN RELAY

M11333

L1 (HOT)

L2

1

Fig. 29. Typical wiring diagram for T8011R and T8411R.

70-6627 • 23

HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE

R

L1 (HOT)

1

L2

THERMOSTAT LOGIC

POWER SUPPLY

W2

W1

O/B

G

Y1

E

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD

1

PROTECTION AS REQUIRED. O/B IS FIELD CONFIGURABLE TO SELECT ENERGIZED IN HEATING OR

2

COOLING. (DEFAULT IS ENERGIZED IN HEATING).

3

REMOVE JUMPER, WHEN SUPPLIED, FOR SYSTEMS WITH SEPARATE HEATING COMPRESSOR CONTACTOR (W1 SEPARATE FROM Y1).

W2

Y1

W1

G

O/B

3

CHECK LED (RED)

C

W1

AUXILIARY HEAT RELAY

W2

E

COMPRESSOR CONTACTOR

Y1

G

CHANGEOVER

2

VALVE

O/B

L

OT

COMPRESSOR CONTACTOR HEAT

EMERGENCY HEAT RELAY

FAN RELAY

COMPRESSOR MONITOR

TO R

OUTDOOR SENSOR C7089B

M13281

Fig. 30. Typical wiring diagram for T8511G.

70-6627 • 24

HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE

1

L1

L2

(HOT)

R

POWER SUPPLY

THERMOSTAT LOGIC

Y

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD

1

PROTECTION AS REQUIRED. WIRES TO OT TERMINALS SHOULD NOT SHARE CABLE WITH OTHER

2

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.

W2

E

O/B

W1

G

4

FAIL LED (RED)

CHECK LED (RED)

C

W1

AUXILIARY HEAT RELAY

W2

E

COMPRESSOR CONTACTOR

Y1

3

O/B

G

X1

X2

L

OT

2

OT

COMPRESSOR CONTACTOR HEAT

EMERGENCY HEAT RELAY

CHANGEOVER VALVE

FAN RELAY

COMPRESSOR MONITOR

OUTDOOR SENSOR C7089B

TO R

M13250

Fig. 31. Typical wiring diagram for T8611G2002 and T8611G2028.

70-6627 • 25

HEAT PUMP 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

The Fan, Heat and Cool outputs are relay controlled. A loss of ac power, or a change in the SYSTEM switch setting can cause the outputs to turn off. Table 2 shows the sequence of operations for the Fan settings and System modes.

Table 2. T8011 and T8411 Sequence of Operation.

FAN Switch Settings SYSTEM Switch Settings Call for Action Energize Terminals Display Icons

Auto Cool None O None Auto Cool Cooling O, Y, G

Auto Heat None B Auto Heat Stage 1 Heat B, W1, G

Auto Heat Stage 2 Heat B, W1, W2, G , Aux Ht

Auto Em. Ht. None L Em Ht indicator Auto Em. Ht. Stage 1 Heat L, E, G , Em Ht indicator

Auto Em. Ht. Stage 2 Heat L, E, W2, G , Em Ht and Aux

None

indicator

Ht indicators

70-6627 • 26

HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE

T8511 Deluxe Electronic Heat Pump Thermostat

Sequence of Operation

The thermostat energizes specific terminals depending on the Fan and System Settings. The LCD will display symbols and words to report the condition of system. See Table 3 for specific information.

Table 3. T8511G Sequence of Operation for Separate Compressor Terminal (Y and W1) Models.

Fan Selection System Selection Call Energize Display Icons

Auto Off None None None

On Off Fan G

Auto Cool None O/B Auto Cool or Auto Cooling O/Ba, G, Y1 and

Auto Heat None O/B Auto Heat or Auto Stage 1 heating O/Ba, W1, G and

Auto Heat or Auto Stage 2 heating O/Ba, W1, W2, G , , and Aux Ht

Auto Em Heat None O/B Auto Em Heat Stage 1 heating O/Ba, E, G , and Em Ht

Auto Em Heat Stage 2 heating O/Ba, E, W2, G , , Em Ht and

Auto Auto None O/B

a

Configure O/B (Select Models) in Installer Setup.

a

None

Em Ht

Aux Ht

None

70-6627 • 27

HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE

T8611 Chronotherm IV Deluxe Programmable Heat Pump Thermostat

Sequence of Operation

The thermostat energizes specific terminals depending on the Fan and System Settings. The LCD will display the time, room temperature, system and fan selection. Symbols will be displayed when the heating, cooling or fan is energized. See Table 4 for specific information.

NOTE: Terminals listed in the Energize column vary depending on model.

Table 4. Heat Pump System Sequence of Operation.

Selection

Fan System Call Energize Display Icons

Auto Off None None None

On Off None G

Auto Cool None O or O/B Auto Cool or Auto Stage 1 Cooling O or O/B

G and Y1 Auto Heat None B or O/B Auto Heat or Auto Stage 1 heating B or O/Ba with W1 and G and

Auto Heat or Auto Stage 2 heating B or O/Ba with W2, W1 and G , , and Aux Ht

Auto Em Heat None B or O/B Auto Em Heat Stage 1 heating B or O/Ba, E and G

(select models) Auto Em Heat Stage 2 heating B or O/Ba, E and W2 and G

(select models) Auto Auto None O/Ba, O or B

a

Configure O/B (select models) in Installer Setup.

b

Based on last piece of equipment called (cooling = O or heating = B) and Installer Setup selection.

a a

a

with

None

and

None

Em Ht

, and Em Ht

, , Em Ht and Aux Ht

b

None

70-6627 • 28

HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE

Thermostat Manufacturer Cross Reference

MANUFACTURER MODEL NUMBER HONEYWELL REPLACEMENT

American Stabilisa HP-1 T841A1712, Y594R1425, Y594G1419, T8411, T8511, T8011,

HP-1EF T841A1712, Y594R1425, Y594G1419, T8411, T8511, T8011,

HP-10EF

b

HP-15 Y594G1252, T8411, T8511, T8011, T8611R, T8611G,

a

See page 37 for hookup details.

b

Compressor protection is generally provided by the equipment manufacturer.

MANUFACTURER MODEL NUMBER HONEYWELL REPLACEMENT

Carrier Totaline

b,c

Multistage Heat Pump MP10/11 T8611G

MP30 T8611M MS10/11 Y594R1425 MS12/13 T841A1316 MS20/21 Y594G1419

a

Use with ST82 Time Delay Relay for extended fan operation.

b

See pages 42-45 for hookup details.

c

Carrier thermostats manufactured by American Stabilis.

T8611R, T8611G

T8611R, T8611G T841A1712, Y594R1425, Y594G1419, T8411, T8511, T8011,

T8611R, T8611G

a

MANUFACTURER MODEL NUMBER HONEYWELL REPLACEMENT

a

Climate Technology Corporation CTC400 T841A1316, Y594G1419, T8411, T8511, T8011, T8611

CTC403 T841A1316, Y594G1419, T8411, T8511, T8011, T8611,

a

Use T8611M or W8900B for 3 heat, 2 cool applications.

MANUFACTURER MODEL NUMBER HONEYWELL REPLACEMENT

Enerstat

b

DSP400 T841A1001a DSP410 T841A1001a DSP600 T874W1031/Q674L1546, Y594W1014

a

Provision for optional remote sensor, not provided.

b

See page 49 for hookup details.

70-6627 • 29

HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE

MANUFACTURER MODEL NUMBER HONEYWELL REPLACEMENT

General Electric

a

See pages 57-58 for hookup details.

MANUFACTURER MODEL NUMBER HONEYWELL REPLACEMENT

a

Lennox

a

See pages 75-81 for hookup details.

a

3AAT86B21A1 Y594G1161, T8411, T8511, T8011, T8611 3AAT86B14A1 T841A1316, Y594R1425, T8411, T8511, T8011, T8611 3AAT86B16D1 T841A1316, Y594R1425, T8411, T8511, T8011, T8611 3AAT80A1A1 T841A1712, Y594R1425, T8411, T8511, T8011, T8611 3AAT80A2A1 T841A1712, Y594R1425, T8411, T8511, T8011, T8611 3AAT80B1A1 Y594G1161, T8411, T8511, T8011, T8611 3AAT86B1A1 Y594G1161, T8411, T8511, T8011, T8611

51H3901

T841A1316, Y594R1425, T8411, T8511, T8011, T8611G

(3AAB83C38) 51H4001

T841A1712, Y594G1419, T8411, T8511, T8011, T8611G

(3AAT88D38B2) 51H4301

T8611M, PC8900A1007/W8900B1002

(3AAT88D38C2) 21J7101

(3AAT89B38D1) 21J7201

T841A1555, Y594R1763, Y594G1161, T8411, T8511, T8011, T8611G

T841A1712, Y594R1425, T8411, T8511, T8011, T8611G

(3AAT89B38E1) 21J7301

T841A1712, Y594G1419, T8411, T8511, T8011, T8611G

(3AAT89B38F1)

MANUFACTURER MODEL NUMBER HONEYWELL REPLACEMENT

Maple Chase 09520 T841A1316, Y594R1425, Y594G1419, T8411, T8511, T8011,

T8611G 09620 T8611M, PC8900A1007/W8900B1002 09720 T8611M, PC8900A1007/W8900B1002

MANUFACTURER MODEL NUMBER HONEYWELL REPLACEMENT

a

Seco

TA2000 T841A1001, Y594R1425, Y594G1419, T8411 T8511, T8011,

T8611

TA2010 T841A1001, Y594R1425, Y594G1419, T8411 T8511, T8011,

T8611

TA2040 T841A1001, Y594R1425, Y594G1419, T8411 T8511, T8011,

T8611 TA2050 T841A1001, Y594R1425, Y594G1419, T8411 TA2060 T841A1555 plus C815A1005

a

See pages 92-93 for hookup details.

70-6627 • 30

HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE

MANUFACTURER MODEL NUMBER HONEYWELL REPLACEMENT

a,b

Trane

Single-Stage Heat Pump

Multistage Heat Pump ASYSTAT651 Y594G1161, T8411, T8511, T8011, T8611

a

See pages 97-100 for hookup details.

b

Trane thermostats manufactured by General Electric or Honeywell.

BAY28X182/BAY28X185 (T874A1184/Q674B1141)

BAY28X182/BAY28X187 (T874A1184/Q674E1033)

BAYSTAT009 (T874A1085/Q674B1018)

AY28X138 Y594G1161, T8411, T8511, T8011, T8611 AY28X139 T841A1068, Y594R1763, T8411, T8511, T8011, T8611 AY28X164 T874D1165/Q674E1049 BAY28X138

(3AAT80B1A1), BAY28X140, BAYSTAT138 BAYSTAT239

(3AAT86B1A1), BAY28X139, BAY28X141, BAY28X153A,

(3AAT83F1B2) BAYSTAT240 (3AAT80A1A1) BAYSTAT339

(Y594R1284) BAYSTAT024B T8611M, PC8900A1007/W8900B1002 TAYSTAT500 T8611R, T8611G

T874A1036/Q674B1075

T874A1036/Q674C1058

T874A1036/Q674B1018

Y594G1161, T8411, T8511, T8011, T8611

T841A1068, Y594R1763, T8411, T8511, T8011, T8611

70-6627 • 31

HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE

MANUFACTURER MODEL NUMBER HONEYWELL REPLACEMENT

White Rodgersa

Single-Stage Heat Pump

Multistage Heat Pump IC70-18 T841A1001, Y594G1252

a

See page 108 for hookup details.

IF56-444 T8034C1234

IF93-36 T8600C1162

IC70-24 T874D1165/Q674F1022 IC71-2 Y594G1419 IF58-910/S28-1 T841A1217, Y594R1300 IF58-910/S28-2 T841A1423, Y594R1615 IF58-910/S28-16 T841A1316, Y594R1425 IF58-911/S28-5 T841A1316, Y594G1419 IF58-911/S28-17 T841A1001, Y594G1252 IF58-911/S28-18 T841A1068, Y594R1136 IF58-56 T841A1050, Y594R1425 IF58-57 T841A1068, Y594R1136 IF58-58 T841A1217, Y594R1425 IF58-72 T841A1233, Y594R1615 IF58-77 T841A1316, Y594R1425 IF58-78 T841A1217, Y594R1425 IF58-83 T841A1217, Y594R1243 IF59-79 T841A1316, Y594R1425 IF60-25 T8600C1162 IF62-21 T8411, T8511, T8011, T8611R, T8611G IF82-79 T8411, T8511, T8011, T8611R, T8611G IF91-71 T8611M, PC8900A1007/W8900B1002 IF92-71 T8611M, PC8900A1007/W8900B1002 IF94-71 T8611M, PC8900A1007/W8900B1002 IF95-71 T8611M, PC8900A1007/W8900B1002

70-6627 • 32

HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE

Tips for Using This Heat Pump Cross Reference

This cross reference, alphabetized by equipment or thermostat manufacturer, provides the information needed to choose and wire the Honeywell electromechanical, Chronotherm III, or electronic heat pump thermostats in new installations and replacement applications. It also gives you the opportunity to upgrade the system from a standard to a deluxe thermostat for improved performance and from manual changeover to the convenience of automatic heat/cool changeover and to a Chronotherm® IV thermostat that puts the heat pump to work to save money. Best of all, you can upgrade to the PC8900/W8900B1002 Perfect Climate Comfort Center™ Control System. This controls temperature, indoor air quality, ventilation, humidity, and zoning.

To use this Cross Reference:

1. Identify heat pump equipment manufacturer and refer to those diagrams in this reference.

2. Identify existing logo, and try to match up for verification. Some typical thermostats and subbases are listed in each section to make identification easier. The Honeywell model number is listed, followed by the equipment manufacturer model number, if available.

3. Make a listing of wiring terminals used and wire colors. You may want to write on the appropriate diagram in this cross reference.

4. Note the unique control requirements your heat pump may have. — Determine reversing valve (changeover) mode. O terminal cool or B terminal heat is typical. — Identify first stage heat terminal. Connect to Y if a common terminal is used for first stage heat and cool, or to

W1 if a separate terminal is used for first stage heat. — Identify if device has manual or automatic changeover from heat to cool. — Identify what action, if any, is required for LED selection; e.g., auxiliary heat, emergency heat, check, or fail.

5. Select a replacement based both on the technical requirements and your customer’s needs; e.g., a working family may find a Chronotherm® IV upgrade desirable.

6. After selecting the proper thermostat, use the corresponding control hookup diagram. See example below.

subbase

model number if made by Honeywell, even if thermostat has equipment manufacturer’s

one

comfort center

Existing

Control

Terminal

Designation

CXC C C C

RRR R R R

7. Connect only those terminals shown with lines to them on the diagram. Some terminals on the new thermostat may not be used.

8. Refer to the following two pages for an example of a typical cross reference diagram and the associated footnotes.

Electromechanical

Thermostat

Hook wire previously on C to X

Hook wire previously on R to R

Chronotherm III

Thermostat

or to

Electronic

Replacement

or Upgrade

Chronotherm IV

Thermostat

or to

Perfect Climate Comfort Center Control System

or to

M13251

70-6627 • 33

HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE

Electronic Replacement or Upgrade

Chronotherm

IV

Electronmechanical

Chronotherm®

III

Function

Common

Compressor

System Monitor/

Sytem Defrost

A

Power

1st Stage

Heat

M

Auxiliary

Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

KL

PC8900/

W8900B1002

L

T841A1712

Y594R1425

Y594G1419

Y594G1476

XX X C CCCC C C

T8611R1000

T8611G1004

T8411R1002

T8411G1028

T8511G1021

T8511G1047

T8011R1006

T8011R1014

T8611G2002

T8611G2028

T8611M1002

T8611M2017

T8611M2025

RR R R RRRR R R

Y Y Y1 Y1 or Y Y Y1 Y Y1 Y1

I

– W1 W1 W1 W1 W1 W1 W1

I

II

I

––

W2 W2 W2 W2 W2 W2 W2 W2 Y2 Aux.

GG G G GGGG G G

P

BB B B BB or

OO O O OO or

–L LLLLLLL

G

H

P

C

O/B

C

O/B

H

G

P

BB or

OO or

H

P

O/B

G

P

C

B or

O/B O/B

O or

O/B O/B

GH

C

E

Y1/W1

F

P

C

G

Em. Heat

Multiple

Heat

Loads

B

LED Indication

Defrost

2nd Stage

Compressor

2nd Stage

Cool in two

Stage System

EE E E EEEE E E

W3 W3 W3 W3

–X2

D

X1 X2 X1 X2

–– – P –––– – –

J

D

N

J

–––

J

–– – – ––––

–– – – –––– –

J

D

X1 X2 X1 X2

Y2 W2

J

–

F

Y2

M13245

O

70-6627 • 34

HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE

A Terminal must be connected to the transformer common. B Terminal is for multiple auxiliary heat loads such as contactors, sequencers, or relays. C Configure O/B (Select Models) in Installer Setup. D Optional LED indication activated with completed circuit on X1 and X2 terminals. E If separate Y1 and W1 terminals are required, install R8222D1014; (See page 12.) F When W2 is not used, configure W2 cycle rate to NC. G LED is energized when terminal is powered. H L terminal is powered continuously when thermostat is in Em. Ht. position. I Do not remove factory-installed jumper. J If multiple auxiliary heat loads are used, connect to W2 (Aux W8900B) terminal. K Used on two-speed compressor heat pump applications. L Used on heat pumps that energize the compressor on both first stage cooling and first stage heating through a common Y

terminal.

M Q674F1022 switching subbase available when separate first stage heat and cool terminals are required. See specific heat pump

manufacturer’s listing for hookup information.

N P terminal on T8611R1000 only. Energized in heating and cooling modes; shown only when used. O Jumper W2 and Y2 if stage 2 heating and cooling are common. P To change fan operation in Emergency Heat mode, see page 9.

X1

CHECK LED (YELLOW)

FAULT DETECTION SWITCH

X2

SWITCH TO R (POWER) SIDE OF SYSTEM TRANSFORMER

TO R

TO C/X

X1

CHECK LED (YELLOW)

SWITCH TO C (COMMON) SIDE OF SYSTEM TRANSFORMER

FAULT DETECTION SWITCH

X2

TO C/X

TO R

CHECK LED (YELLOW)

SWITCH IN SECONDARY OF SEPARATE TRANSFORMER

X1

X2

SWITCHING DEVICE

24 VAC

L1 (HOT)

L2

M13246

70-6627 • 35

AMANA

Models: RHA1842A, RHA (24-42)A2A, RHA (48-60)A2A, RHA (36, 48, 60)A3A & A4A, RHD (18-24)A2A, RHD (30-60)A2A, RHE (18-24)A2A, RHE (30-60)A2A, RHA (36, 48, 60)A3B & A4B.

Electronic Replacement or Upgrade

Electromechanical

Chronotherm

III

®

Chronotherm

IV

Function

Common

Compressor

1st Stg. Heat

System Monitor/

System Defrost

C

Power

Aux. Heat

Fan

C/O V alve

Cool

C/O V alve

Heat

Em. Heat

Existing

Terminals

or

X

X1 or C

T841A1712

Y594R1425

Y594G1419

Y594G1476

T8611G1004

T8611R1000

T8411R1002

T8411R1028

T8511G1021

T8511G1047

T8011R1006

T8011R1014

T8611G2002

T8611G2028

XXX C CCCCC

PC8900/

W8900B1002

RRRR R RRR RR

YYYY1Y1

B

Y Y Y1 Y Y1

B

B B

B

W1 – W1 W1 W1 W1 W1 W1 W1

W2 W2 W2 W2 W2 W2 W2 W2 W2 Aux.

or

Y1/W1

–

D

I

GGGG G GGG GG

H

OOOO O O O

or

O/B

OO

H

or

O/B O/B

H

BBBB B BB

or

O/B

BB

H

or

O/B O/B

H

EEEE E EEE EE

A

L L L LLL LL

J

F

J

F

J

Multiple Aux.

A

W3 W3 W3 W3

Heat Loads

LED

Indication

Defrost

2nd Stage

––

A

P––– – ––– ––

–––– – ––– –

E

X2 X1 X2 X1 X2

Compressor

2nd Stage

–––– – ––– –

Cool

A Not available on all models. B Do not remove factory-installed jumper. C Terminal must be connected to the transformer common. D If separate Y1 and W1 terminals are required, install R8222D1014.

See page 12.

E Field-installed X2 to X jumper.

TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER (CUSTOMER PART NUMBER)

T841A1241 (D99458003) T8611R1083 (D9807605) T874R1194/Q674L1249

G

–– –

G

X1 X2

G

–

W2

Y2

F L terminal is powered continuously when thermostat is in Em. Ht. position. G If multiple auxiliary heat loads are used, connect to W2 (Aux W8900B)

terminal.

H Configure O/B (select models) in Installer Setup. I When W2 is not used, configure W2 cycle rate to NC. J LED is energized when terminal is powered.

M13172

I

70-6627 • 36

AMERICAN STABILIS

TYPICAL THERMOSTATS AND SUBBASES: HP1, HP1EF, HP10EF, HP15

Function

Common

Compressor

1st Stg. Heat

System Monitor/

System Defrost

E

Power

Aux. Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

Electromechanical

Chronotherm

Existing

Terminals

T841A1712

Y594R1425

Y594G1419

Y594G1476

C XXX C CCC CC

T8611R1000

T8611G1004

T8611M7008

®

III

T8411R1002

Electronic Replacement or Upgrade

T8411R1028

T8511G1021

T8511G1047

T8011R1006

T8011R1014

Chronotherm

IV

T8611G2002

T8611G2028

PC8900/

W8900B1002

R RRR R RRR RR

Y1 Y Y1 Y1 Y1

––

W1 W1 W1 W1 W1 W1 W1

G

or

Y Y Y1 Y Y1

G

Y1/W1

–

B

W2 W2 W2 W2 W2 W2 W2 W2 W2 Aux.

G GGG G GGG GG

A

or

O/B

C

A

BBBB B BB

OOOO O OO

X LX1 L LLL LL

CC

D

B B

OO

D

A

or

O/B O/B

A

or

O/B O/B

C

A

C

EM. Heat

Multiple Aux.

E EEE E EEE EE

–

W3 W3 W3

Heat Loads

LED

Indication

2nd Stage

H

––

X2 X2 X1 X2

– ––– – ––– –

H

Compressor

A Confgure O/B (select models) in Installer Setup. B When W2 is not used, configure W2 cycle rate to NC. C LED is energized when terminal is powered. D L terminal is powered continuously when thermostat is in Em. Ht. position. E Terminal X (C) must be connected to transformer common.

– ––– ––

F

F Optional CHECK LED on T8611G,M. Connect X to X1; jumper X2 to C.

See Fig. 26 and 27.

G Field-installed W1 to Y1 jumper (provided). H Field-installed X2 to X jumper (provided).

–– –

X1 X2

–

W2

M13142

B

70-6627 • 37

ARMSTRONG/AIR-EASE

Electromechanical

Chronotherm

III

Electronic Replacement or Upgrade

®

Chronotherm

IV

Function

Common

Compressor

1st Stg. Heat

System Monitor/

System Defrost

E

Power

Aux. Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

Existing

Terminals

or

X

C X X X C C C C C C

T841A1712

Y594R1425

Y594G1419

Y594G1476

T8611R1000

T8611G1004

T8411R1002

T8411R1028

T8511G1021

T8511G1047

T8011R1006

T8011R1014

T8611G2002

T8611G2028

PC8900/

W8900B1002

RRRR R RRRRR

Y Y Y Y1 Y1

F F

W1

–

F

W1 W1 W1 W1 W1 W1 W1

F

or

Y Y Y1 Y Y1

F

FF

F

W2 W2 W2 W2 W2 W2 W2 W2 W2 Aux.

Y1/W1

–

J

G

GGGG G GGGGG

A

BBBB B BB

OOOO O OO

L LX1 L LLL LL

B

C

or

O/B

A

or

O/B

C

B

B B

OO

C

A

or

O/B O/B

A

or

O/B O/B

B

A

B

EM. Heat

Multiple Aux.

Heat Loads

LED

Indication

Defrost

2nd Stage

D

EEEE E EEEEE

W3 W3 W3 W3

––

X2 X2 X1 X2

H

P – –– P ––– ––

–––– – ––––

Compressor

A Configure O/B (select models) in Installer Setup. B LED is energized when terminal is powered. C L terminal is powered continuously when thermostat is in Em. Ht. position. D Terminal is for multiple second stage loads such as contactors,

sequencers, or relays.

E Terminal X or C must be connected to transformer common. F Do not remove factory-installed jumper.

TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER

T8611R1182 T841A1597

A

––– ––

I

K

–––

X1 X2

–

W2

G When W2 is not used, configure W2 cycle rate to NC. H Field-installed X2 to X jumper (provided). I Optional CHECK LED on T8611G1004. See Fig. 26. J If separate Y1 and W1 terminals are required, install R8222D1014. See

page 12.

K Available on T8611R1000 only.

M13143

G

70-6627 • 38

ARCOAIRE/SNYDER GENERAL/COMFORTMAKER

AYC, AYD, AYF

Function

Common

Compressor

1st Stg. Heat

C

Power

Aux. Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

®

Electronic Replacement or Upgrade

Electromechanical

Existing

Terminals

X

or

C X X X C C C C C C

T841A1712

Y594R1425

or X1

R RRR R RRR RR

Y Y Y Y1 Y1

W1

or

W2

W1 W2 W2 W2 W2 W2 W2 W2 W2

–

W1 W1 W1 W1 W1 W1 W1

G GGG G GGG GG

B B B B B B B or

O O O O O O O or

E

Y594G1419

Y594G1476

E

III

T8611R1000

T8611G1004

Chronotherm

T8411R1002

T8411R1028

or

Y Y Y1 Y Y1

E

T8511G1021

T8511G1047

A

O/B

A

O/B

T8011R1006

Chronotherm

T8011R1014

EEE

B B or

OO or

IV

T8611G2002

T8611G2028

E

A

O/B O/B

A

O/B O/B

PC8900/

W8900B1002

Y1/W1

–

B

Aux.

A

K

System Monitor/

System Defrost

EM. Heat

Multiple Aux.

Heat Loads

LED

Indication

D

Defrost

2nd Stage

Compressor

A Configure O/B (select models) in Installer Setup. B When W2 is not used, configure W2 cycle rate to NC. C Terminal X (C, X1) must be connected to transformer common. D Terminal is for multiple second stage loads such as contactors,

sequencers, or relays.

E Do not remove factory-installed jumper. F Optional CHECK LED on T8611G1004. See Fig. 26. G Field-installed X2 to X jumper (provided).

T841A1142 (1506726) T841A1159 (1505726) T874D1603 T874G1592/Q674F1212 T874G1782/Q674J1175 (1506756) T874G1774/Q674J1175 (1505756) T874R1301/Q674L1181 (1505714) T874R1483/Q674L1538 (1505721) T874R1517/Q674L1538 (1506721) T874R1525/Q674L1181 T874R1574/Q674L1538 T874R1582/Q674L1538 (A02077) T874R1723/Q674L1702 (654958B07) T8611R1067 (1506-744) T8611R1075 (1505-744) T8300A1193/Q6300A

or

L

X LX1 L LLL LL

E EEE E EEE EE

–

W3 W3 W3

––

P ––– P ––– ––

–––– – ––– –

TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER (CUSTOMER PART NUMBER)

I

G

X2 X2 X1 X2

I

G

L

H

F

J

H If multiple auxiliary heat loads are used, connect to W2 (Aux W8900B)

terminal.

I LED is energized when terminal is powered. J Available on T8611R1000 only. K If separate Y1 and W1 Terminals are required, install R8222D1014.

See page 12.

L L terminal is powered continuously when thermostat is in Em. Ht. position.

L

HH H HH

–––

I

L

I

X1 X2

I

–

B

W2

M13144

70-6627 • 39

BARD

Models: 24UHPQC, 30UHPQC, 42UHPQC, 48UHPQB, 48UHPQB-B, 48UHPQC-B, 60UHPQC-B

Function

Common

Compressor

1st Stg. Heat

E

Power

Aux. Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

®

Electromechanical

Existing

Terminals

C

or

T841A1712

X X X X C C C C C C

Y594R1425

Y594G1419

Y594G1476

III

T8611R1000

T8611G1004

Chronotherm

T8411R1002

T8411R1028

Electronic Replacement or Upgrade

Chronotherm

IV

T8511G1021

T8511G1047

T8011R1006

T8011R1014

T8611G2002

T8611G2028

PC8900/

W8900B1002

or X1

Rh

RRRR R RRR RR

or

Rc

Y Y Y Y1 Y1 or Y Y Y1 Y Y1

F

––

W1 W1 W1 W1 W1 W1 W1 –

F

FF

Y1/W1

F

W2 W2 W2 W2 W2 W2 W2 W2 W2 Aux.

GGGG G GGGGG

A

O/B O/B

A

O/B O/B

A

B or

W1

BBB B BB or

OOOO O OO or

A

O/B

A

O/B

B B or

OO or

B

System Monitor/

System Defrost

EM. Heat

Multiple Aux.

Heat Loads

LED

D

Indication

2nd Stage

Compressor

A Configure O/B (select models) in Installer Setup. B When W2 is not used, configure W2 cycle rate to NC. C If multiple auxiliary heat loads are used, connect to W2 (Aux W8900B)

terminal.

D Terminal is for multiple second stage heating loads such as contactors,

sequencers, or relays.

L LX1 L LLL LL

EEEE E EEEEE

W3 W3 W3 W3

––

–––– – ––––

IJ

H

X2 X2 X1 X2

I

H

C

G

J

C

I

C

–––

C

J

I

C

X1 X2

C

–

W2

E Terminal X (C, X1) must be connected to transformer. F Do not remove factory-installed jumper. G Optional CHECK LED on T8611G1004. See Fig. 26. H Field-installed X2 to X jumper (provided). I LED is energized when terminal is powered. J L terminal is powered continuously when thermostat is in Em. Ht. position.

M13145

I

B

70-6627 • 40

TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER

T872N1036/Q672F1299 T872N1164/Q672L1185 T874N1024/Q674F1261

T874R1129/Q674L1181 T874R1152/Q674L1207

B.D.P. (BRYANT-DAY/NIGHT-PAYNE)

Function

Common

Compressor

1st Stg. Heat

System Monitor/

System Defrost

F

Power

Aux. Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

®

Electronic Replacement or Upgrade

M

T8411R1002

T8411R1028

G

M

T8511G1021

T8511G1047

G

A

O/B

A

or

O/B

K

Chronotherm

T8011R1006

T8011R1014

G

B B or

O O or

M

IV

T8611G2002

T8611G2028

G

A

O/B O/B

A

O/B O/B

K

PC8900/

W8900B1002

Y1/W1

–

B

A

K

Electromechanical

Existing

Terminals

C1

or C X X X C C C C C C

X1

T841A1712

Y594R1425

R RRR R R R RR R

W1

or Y Y1 Y Y1 Y1 or Y Y Y1 Y Y1

––

W1 W1 W1 W1 W1 W1 W1

W2 W2 W2 W2 W2 W2 W2 W2 W2 A ux.

G GGG G G G GG G

B B B B B B B or

Y1 or O O O O O O O

L or F L L L L L L L

G

K

Y594G1419

Y594G1476

G

III

T8611R1000

T8611G1004

G

Chronotherm

EM. Heat

Multiple Aux.

Heat Loads

Defrost

LED

Indication

2nd Stage

X or E E E E E E E E E E

C

D

W3 W3 W3 W3

E

P ––– P – – –– –

I

X–

X2 X1 X2 X1 X2

– ––– – – – ––

Compressor

A Configure O/B (select models) in Installer Setup. B When W2 is not used, configure W2 cycle rate to NC. C If provided on original equipment. D Terminal is for multiple second stage heating loads such as contactors,

sequencers, or relays.

E Model 545 typical. P terminal provided on T8611R1000 only. F Terminal X (C, X1, C1) must be connected to transformer common. G Do not remove factory-installed jumper.

TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER (CUSTOMER PART NUMBER)

T872G1166/Q672F1125 T872G1174/Q672F1125 T874G1261/Q674F1253 T874G1451 (HH641502)/Q674F1212

J

E

L

T874J1010/Q674J1084 (34427DP124/P272-2471/34427DP126,P272-1879) T874J1010/Q674L1371 (34427DP124/P272-2471/34427DP125,P272-1878) T874R1004/Q674B1042 T874R1335 (HH641501)/Q674L1405

H

H Optional CHECK LED on T8611G1004. See Fig. 26. I Field-installed X2 to X jumper (provided). J If multiple auxiliary heat loads are used, connect to W2 (Aux W8900B)

terminal.

K LED is energized when terminal is powered. L Optional Check M L terminal is powered continuously when thermostat is in Em. Ht. position.

J

–––

LED

J

X1 X2

activated with completed circuit on X1 and X2 terminals.

L

J

–

B

W2

M13146

70-6627 • 41

CARRIER

TYPICAL 50YQ, QT; 38QF, QN, QB, NPHPO1, 38YRA

Function

Common

Compressor

1st Stg. Heat

System Monitor/

System Defrost

E

Power

Aux. Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

Electronic Replacement or Upgrade

T8411R1028

T8511G1021

T8511G1047

T8011R1006

T8011R1014

Chronotherm

IV

T8611G2002

T8611G2028

PC8900/

W8900B1002

Existing

Terminals

Electromechanical

T841A1712

Y594R1425

Y594G1419

Y594G1476

Chronotherm

III

T8611R1000

T8611G1004

®

T8411R1002

C X XX C CC CC C

RR RR R RR RR R

Y Y Y Y1 Y1

F

W1

or

W2 W2 W2 W2 W2 W2 W2 W2 W2 Aux.

–

W1 W1 W1 W1 W1 W1 W1

F

or

Y Y Y1 Y Y1

F

FF

F

Y1/W1

–

B

GG GG G GG GG G

A

or

O/B

A

O/B

II

B B B B B B B

O O O O O O O

C

or

F

LLX1LLLLLL

I

K

B B

OO

K

A

or

O/B O/B

A

or

O/B O/B

I

A

I

EM. Heat

Multiple Aux.

Heat Loads

LED

Indication

Defrost

2nd Stage

D

EE EE E EE EE E

–

––

W3 W3 W3

H

X2 X2 X1 X2

H

P– –– P –– –– –

–– –– – –– ––

Compressor

A Configure O/B (select models) in Installer Setup. B When W2 is not used, configure W2 cycle rate to NC. C If provided on original equipment. D Terminal is for multiple second stage loads such as contactors, sequencers,

or relays.

E Terminal X (C) must be connected to transformer common. F Do not remove factory-installed jumper.

T841C1009 (HH07AT180)

TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER (CUSTOMER PART NUMBER)

T872G1075/Q672J1054 (HH07AT171/HH93AZ173) T872G1075/Q672L1052 (HH07PZ085/HH93AZ075A) T874C1166 (HH07AT160) T874D1272 (HH07AT162) T874G1055/Q674J1035 (HH07AT171/HH93AZ173A) T874G1055/Q674J1118 (HH07AT171/HH93AZ188) T874G1055/Q674L1041 (HH07AT171/HH93AZ175A) T874G1055/Q674L1397 (HH07AT171/HH93AZ185A) T874G1055/Q674P1005 (HH07AT171/HH93AZ169) T874G1071/Q674P1005 (HH07AT171/HH93AZ169)

T874G1121 (HH07AT161) T874G1717/Q674J1167 T874H1070/Q674B1406 (HH07AT166/HH93AZ200) T874H1070/Q674C1322 (HH07AT166/HH93AZ199) T874H1088/Q674B1406 (HH07AT166/HH93AZ200) T874H1088/Q674C1322 (HH07AT166/HH93AZ199) T874J1002/Q674L1074 (HH07AT175/HH93AZ186) T874L1000/Q674E1270 (HH07AT176/HH93AZ189) T874L1018/Q674B1356 (HH07AT178/HH93AZ192) T874L1018/Q674C1264 (HH07AT178/HH93AZ193)

––––––

G

J

G Optional CHECK LED on T8611G1004. See Fig. 26. H Field-installed X2 to X jumper (provided). I LED is energized when terminal is powered. J Available on T8611R1000 only. K L terminal is powered continuously when thermostat is in Em. Ht. position.

–––

T874R1319/Q674B1281 (42QH400083/42QH400103) T874R1384/Q674L1439 (HH07AQ170/HH93AZ187) T874R1384/Q674L1579 (HH07AQ170/HH93AZ198) T874V1008/Q674R1003 (HH07AT177/HH93AZ190) T8085R1007/Q682L1002 (HH07AT075/HH93AZ159C) T8085R1023/Q682L1028 (HH07AT075C/HH93AZ159C) T8141A1147 T8611G1046 (HH07AE001) T8611R1208 (HH07AX114) T8611R1216 (HH07AX115)

X1 X2

–

W2

M13147

B

70-6627 • 42

Electromechanical

Chronotherm® III

CARRIER

TYPICAL 38BQ C

Electronic Replacement or Upgrade

Chronotherm IV

Function

Common

1st Stage Cool

1st Stage Heat

2nd Stage Heat

Common 1st Stage

Compressor

Power

Fan

C/O V alve

Cool

C/O V alve

Heat

Em. Heat

A

C

Existing

Terminals

T874D1165/

Q674F1022

T8611M7008

T8511M1002

T8611M2017

T8611M2025

PC8900/

W8900B1002

C X1 C C C C

RR RRRR

C

Y1 Y1

C

W1 W1

W2 W2 W2 Y2 Y2 W2

B

C

GG GGGG

C

–O O

C

–B B

EE EEEE

–– YY1Y1

B

C

E

O/B O/B O/B

C

E

C

Y1/W1

E

C

F

System Monitor/

–– LLLL

System Defrost

LED Indication

2nd Stage Cool

A Terminal must be connected to the transformer common. B For auxiliary heat LED indication, jumper X2 to W2 on Q674. For emergency

heat LED indication, jumper X2 to E.

C Relay required (R8222B1067 typically) for T8511M, T8611M,

PC8900/W8900B1002 application. See page 9 for wiring diagram.

TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER (CUSTOMER PART NUMBER)

XX2

Y2 Y2 Y2 Y2 Y2 Y2

T874D1074/Q674F1030 (HHO7AT172/HH93AZ174)

T874D1074/Q674F1063 (HH07AT172/HH93AZ181)

B

G

D

X1 X2

D Optional LED indication activated with completed circuit on X1 and

X2 terminals.

E Configure O/B (select models) in Installer Setup. F Configure Y1/W1 terminal in installer setup. G L terminal is continuously energized in Em. Heat Mode. H LED is energized when terminal is powered.

H

–

G

X1 X2

D

H

–

M13148

70-6627 • 43

CARRIER

USES HONEYWELL Q674L1116 (HH93AZ171) SUBBASE

Electromechanical

Function

Common

B

Existing

Terminals

NOT

AVAILABLE

C X1 C C C C

NOT

AV AILABLE

T874D1165/

Q674F1022

Chronotherm

H

T8611M7008

®

III

Electronic Replacement or Upgrade

Chronotherm IV

T8511M1002

T8611M2017

T8611M2025

PC8900/

W8900B1002

Power

Compressor

1st Stg. Heat

2nd Stage

Compressor

Fan

C/O V alve

Heat

C/O V alve

Cool

System Monitor/

System Defrost

EM. Heat

2nd Stg. Cool

RRRRRR

G

Y Y1 Y Y1 Y1

–

Y1

E

W1

W2 W2 Y2 Y2 W2

G

–– – –

G

Y1/W1

GGGGGG

–BB

NOT AVAILABLE

OOO

LX2LLLL

NOT AVAILABLE

F

J

D

O/B O/B O/B

D

O/B O/B O/B

I

J

D

I

EEEEEE

A

–

Y2 Y2

A

––

Y2

A

LED

Indication

A Jumper Y2 to W2. B Terminal C (X1) must be connected to transformer common. C Optional CHECK LED on T8611M7008. Connect L to X1, jumper X2 to C. D Configure O/B (select models) in Installer Setup. E In this application, auxiliary heat and compressor two are both connected

to terminal Y1.

F For second stage compressor LED indication, jumper X2 to Y2 on Q674.

For emergency heat LED indication, jumper X2 to E. For system monitor LED indication, connect L to X2.

––

TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER (CUSTOMER PART NUMBER)

T874D1264/Q674L1116 (HH07AT173/HH93AZ171)

70-6627 • 44

C

X1 X2

G Both first stage heat and cool are connected to Y or Y1/W1 terminal. H When subbase system switch is in AUTO position, equipment operates in

cool mode only.

I LED is energized when terminal is powered. J L terminal is powered continuously when thermostat is in Em. Ht. position.

–

X2

C

–

M13149

Electromechanical

Chronotherm

CARRIER

TWO-SPEED COOLING COMPRESSORS

Electronic Replacement or Upgrade

®

III

Chronotherm IV

Function

Common

Compressor

Heat Relay

System Monitor/

System Defrost

A

Power

1st Stg.

2nd Stg.

Fan

C/O V alve

Cool

C/O V alve

Heat

Existing

Terminals

NOT

AVAILABLE

NOT

AV AILABLE

NOT

AVAILABLE

T8611M7008

T8511M1002

T8611M2017

T8611M2025

PC8900/

W8900B1002

C C C C C

RRRRR

Y Y Y1 Y1

Y1/W1

Y2 Y2 Y2 Y2 Y2

W2 W2 W2

NOT AVAILABLE

E

GGGGG

OO

–B

LLLLL

D

B

O/B O/B O/B

B

O/B O/B O/B

C

B

D

B

C

EM. Heat

Multiple Aux.

EEEEE

–

Heat Loads

A Terminal C must be connected to transformer common. B Configure O/B in Installer Setup. C LED is energized when terminal is powered.

TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER (CUSTOMER PART NUMBER)

T874S1001/Q674F1501 (HH07AT201/HH93AZ215)

W3 W3 W3 Aux.

D L terminal is powered continuously when thermostat is in Em. Ht. position. E If 2nd stage heat is auxiliary (electric resistive), connect auxiliary stage

to W3.

T8611T7000 (HH07AX112) T8611T7018 (HH07AX113)

M13150

70-6627 • 45

CRISPAIRE/MARVAIR

Function

Common

Compressor

1st Stg. Heat

A

Power

Aux. Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

®

Electronic Replacement or Upgrade

Electromechanical

Existing

Terminals

XX X X C C C C C C

T841A1308

Y594R1797

RR R R R R R R R R

Y Y Y Y Y1

–– – –

W2 W2 W2 W2 W2 W2 W2 W2 W2 Aux.

GG G G G G G G G G

B B B B B B B

OO O O O OO

Y594G1633

III

T8611R1000

T8611G1004

W1 W1 W1 W1 W1

Chronotherm

T8411R1002

T8411R1028

or

Y Y Y1 Y Y1

C

D

C

D

T8511G1021

T8511G1047

or

C

D

E

O/B

E

O/B

T8011R1006

T8011R1014

C

D

B B

OO

Chronotherm

IV

T8611G2002

T8611G2028

C

D

E

or

O/B O/B

E

or

O/B O/B

PC8900/

W8900B1002

Y1/W1

–

D

E

B

System Monitor/

AL L L L L L L L L

F

System Defrost

EM. Heat

2nd Stage

EE E E E E E E E E

–– – – – – – – –

Compressor

A Terminal X or C must be connected to transformer common. B When W2 is not used, configure W2 cycle rate to NC. C Do not remove factory-installed jumper. D To eliminate automatic fan in emergency heat mode, connect switching relay

as shown on page 9.

G

D

G

D

F

D

G

D

F

D

W2

E Configure O/B (select models) in Installer Setup. F LED is energized when terminal is powered. G L terminal is powered continuously when thermostat is in Em. Ht. position.

M13151

F

D

B

70-6627 • 46

Electromechanical

Chronotherm®

III

ECONAR

Electronic Replacement or Upgrade

Chronotherm

IV

Function

Common

Compressor

1st Stg. Heat

System Monitor/

System Defrost

E

Power

Aux. Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

Existing

Terminals

XXXX C CCCCC

T841A1712

Y594R1425

Y594G1419

Y594G1476

T8611R1000

T8611G1004

T8411R1002

T8411R1028

T8511G1021

T8511G1047

T8011R1006

T8011R1014

T8611G2002

T8611G2028

PC8900/

W8900B1002

RRRR R RRRR R

Y Y Y Y1 Y1

F

––

W1 W1 W1 W1 W1 W1 W1

F

W2 W2 W2 W2 W2 W2 W2 W2 W2 Aux.

or

Y Y Y1 Y

F

FF

Y1 Y1/W1

F

–

B

GGGG G GGGG G

A

BBBB B BB

OOOO O OO

C

LL LLLLLL

L

or

O/B

A

or

O/B

L

GG

B B

OO

A

or

O/B O/B

A

or

O/B O/B

G

A

GL

EM. Heat

Multiple Aux.

EEEE E EEEE E

W3 W3 W3 W3

Heat Loads D

LED

Indication

2nd Stage

––

H

X2 X1 X2 X1 X2

–––– – ––––

J

Compressor

A Configure O/B (select models) in Installer Setup. B When W2 is not used, configure W2 cycle rate to NC. C If provided on original equipment. D Terminal is for multiple second stage loads such as contactors, sequencers,

or relays.

E Terminal X (C) must be connected to transformer common. F Do not remove factory-installed jumper. G LED is energized when terminal is powered.

TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER

T874G1915/Q674F1212 T874R1921/Q674L1207

K

I

K K

–– –

K

X1 X2

K

J

–

W2

H Field-installed X2 to X jumper (provided). I Optional CHECK LED on T8611G1004. See Fig. 26. J Optional LED indication activated with completed circuit on X1 and X2

terminals.

K If multiple auxiliary heat loads are used, connect to W2 (Aux W8900B)

terminal.

L L terminal is powered continuously when thermostat is in Em. Ht. position.

M13152

B

70-6627 • 47

ECONAR

Function

Common

Compressor

1st Stg. Heat

System Monitor/

System Defrost

A

Power

Aux. Heat

Fan

C/O V alve

Heat

®

Chronotherm

Electromechanical

Existing

Terminals

X XX C CCCCC

NOT

AVAILABLE

Y594R1425

Y594G1419

Y594G1476

III

T8611R1000

T8411R1002

T8411R1028

Electronic Replacement or Upgrade

Chronotherm

IV

T8511G1021

T8511G1047

T8011R1006

T8011R1014

T8611G2002

T8611G2028

PC8900/

W8900B1002

R RR R RRRRR

Y Y Y1 Y1 Y Y1 Y Y1

B

W1 W1 W1 W1 W1 W1 W1 W1

W2 W2 W2 W2 W2 W2 W2 W2 Aux.

G GG G GGGGG

BBBBBB

L LX1 L LLLLL

NOT AVAILABLE

G

or

O/B

H

I

HI H

B B or

G

O/B O/B

Y1/W1

–

G

HH

F

D

EM. Heat

Multiple Aux.

Heat Loads

C/O V alve

C

E EE E EEEEE

W3 W3 W3

OOOOOO

Cool

LED

Indication

2nd Stage

–X2X2––––

––––––––

Compressor

A Terminal X (C) must be connected to transformer common. B Remove factory-installed Y1 (Y) to W1 jumper. C Terminal is for multiple second stage loads such as contactors, sequencers,

or relays.

D When W2 is not used, configure W2 cycle rate to NC.

E

E E E

G

or

O/B

OO

or

O/B O/B

X1 X2

E If multiple auxiliary heat loads are used, connect to W2 (Aux W8900B)

terminal.

F Install R8222D1014 (see page 12) for separate Y1 and W1 terminals. G Configure O/B (select models) in Installer Setup. H LED is energized when terminal is powered. I L terminal is powered continuously when thermostat is in Em. Ht. position.

E

G

–

D

W2

M13153

70-6627 • 48

TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER

T874G1915/Q674F1410

ENERSTAT

Function

Common

Compressor

E

Power

1st Stage

Heat

2nd Stage Aux. Heat

3rd Stage

Aux. Heat

Fan

Electronic Replacement or Upgrade

III

or

G

W3

Y

®

T8411R1002

Chronotherm

T8411R1028

T8511G1021

T8511G1047

Y Y1 Y Y1

–– –

GG

T8011R1006

T8011R1014

G

T8611M2017

IV

PC8900/

T8611M2025

– –

W3

W8900B1002

Y/W1

I

–

Chronotherm

Electromechanical

Existing

Terminals

T841A1712

Y594R1425

XXXX C CCCCC

RRRR R RRRRR

B

HP1

or

HP

YY1Y1

– – W1 W1 W1 W1 W1 W1

– W2 W2 W2 W2 W2 W2 W2 W2 Aux.

––––

GGGG G GGGGG

G

Y594G1419

Y594G1476

G

T8611R1000

T8611G1004

T8611M7008

Y1

2nd Stage

C

HP2 Y2 Y2 Y2

Comp.

C/O V alve

C

BBBB

Heat

C/O V alve

C

O O O O O O O or

Cool

System Monitor/

––LX1L LLLLL

System Defrost

EM. Heat

Multiple Aux.

Heat Loads

D

Remote Sensor

LED

Indication

A Configure O/B (select models) in Installer Setup. B Both first stage heat and cool are connected to HP terminal. C If provided on original equipment. D Terminal is for multiple auxiliary heat loads such as contactors, sequencers,

or relays.

E Terminal X (C) must be connected to transformer common.

–EEE E EEEEE

–

––

W3 W3 W3 – – – – – –

–

––

H

X2 X2 X1 X2

H

J

A

B B B or

––––

F

F Optional CHECK LED on T8611G,M. See Fig. 26 and 27. G Do not remove factory-installed jumper. H Field-installed X2 to X jumper (provided). I When W2 is not used, configure W2 cycle rate to NC. J T8611M7008 Model.

–– –

O/B

A

O/B

B

O

O/B O/B

–

X1 X2

A

–

M13173

70-6627 • 49

EVCON/COLEMAN

MODELS: 3200, 3300 A

Chronotherm® III Electronic Replacement or Upgrade

Function

Common

Power

1st Stg. Heat

Compressor

Aux. Heat

C/O V alve

System Monitor/

System Defrost

B

Fan

Cool

Heat

A

Existing

Terminals

BLCK C C C

(2)

A

T8611R1000

A

T8411R1002

T8411R1028

RED R R R

(1)

W

(5)

YY1 Y1 Y1

(6)

W2 W2 W2 W2

(4)

W1 W1 W1

C

GG G G

BO O O

(5)

–B B B

A

EL L L

(3)

A

T8011R1006

T8011R1014

C

EM. Heat

A

LED Indication

A R8222B1067 relays required to operate system. Equipment requires normally

energized emergency heat. See page 10 for wiring diagram.

B Terminal must be connected to the transformer common.

A

AE E E

(10)

X– – –

(3)

C Remove factory-installed jumper on Model 3200. Do not remove factory-

installed jumper on Model 3300.

M13203

70-6627 • 50

EVCON/COLEMAN

MODELS: 3200, 3300, 3360, 3400, 6000, 6500 AD

Function

Common

Compressor

E

Power

1st Stage

Heat

Aux. Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

Chronotherm

Electromechanical

Existing

Terminals

T841A1712

Y594R1425

Y594G1419

Y594G1476

BLCK X X X C C C C C C

(2)

RED R R R R R R R R R

(1)

Y Y Y Y1 Y1 or Y Y Y1 Y Y1

(6)

G

– – W1 W1 W1 W1 W1 W1 W1 –

W2 W2 W2 W2 W2 W2 W2 W2 W2 Aux.

(4)

GGGG G GGGGG

– B B B B B B or

V O O O O O O or

(5)

T8611R1000

®

III

T8611G1004

G

T8411R1002

T8411R1028

T8511G1021

T8511G1047

GG

B

O/B

B

O/B

Chronotherm

T8011R1006

T8011R1014

G

BB or

OO or

IV

T8611G2002

T8611G2028

G

B

O/B O/B

B

O/B O/B

PC8900/

W8900B1002

Y1/W1

I

B

Electronic Replacement or Upgrade

System Monitor/

–

L– L LL L LL

System Defrost

Em. Heat

Multiple Aux.

Heat Loads

LED

Indication

2nd Stage

D

F

D

AE

EE

–W3W3W3 – ––– ––

X–

(3)

H

X2 X1

C

X2 X1

–––– – ––––

Compressor

2nd Stage

Y2

––

Y2

Cool

A See Coleman wholesaler to obtain replacements for these thermostats. If not

possible, basic functions can be provided as shown.

B Configure O/B (select models) in Installer Setup. C Optional LED indication activated with completed circuit on X1 and

X2 terminals.

D R8222B1067 relays required to operate system. Equipment requires normally

energized emergency heat. See page 10 for wiring diagram.

EEEEEE

C

X1 X2

–

I

X2

C

–– –

W2

–––––

E Terminal must be connected to the transformer common. F Terminal is for multiple auxiliary heat loads such as contactors, sequencers,

or relays.

G Do not remove factory-installed jumper. H Field-installed X2 to X (C) jumper. I When W2 is not used, configure W2 cycle rate to NC.

Y2

M13204

TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER (CUSTOMER PART NUMBER)

T8300A1029/Q6300A1029 (3300-382/3300-383)

70-6627 • 51

EVCON/COLEMAN

TYPICAL 3700, 3900, 4400, 6500, 7100, 9200 (3600 SERIES THERMOSTAT) DIRECT REPLACEMENTS

Function

Common

Compressor

A

Power

1st Stage

Heat

Auxiliary

Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

Chronotherm

Electromechanical

Existing

Terminals

T841A1308

Y594R1797

Y594G1633

XXXX C CCCCC

RRRR R RRRRR

Y Y Y Y Y1 or Y Y Y1 Y Y1

––––

W2 W2 W2 W2 W2 W2 W2 W2 W2 Aux.

GGGG G GGGGG

B B B B B B B or

O O O O O O O or

T8611R1000

W1 W1 W1 W1 W1

®

III

T8611G1004

C

D

T8411R1002

T8411R1028

C

D

Chronotherm

IV

T8511G1021

T8511G1047

T8011R1006

T8011R1014

C

D

EE

O/B

E

O/B

BB or

OO or

C

D

T8611G2002

T8611G2028

PC8900/

W8900B1002

Y1/W1

C

D

O/B O/B

E

O/B O/B

–

B

D

E

Electronic Replacement or Upgrade

System Monitor/

LLLL L LLLLL

F

FF

System Defrost

Em. Heat

2nd Stage

EEEE E EEEEE

–––– – ––––

Compressor

A Terminal X (C) must be connected to transformer common. B When W2 is not used, configure W2 cycle rate to NC. C Do not remove factory-installed jumper. D To eliminate automatic fan in emergency heat mode, connect switching

relay as shown on page 9.

G

D

E Configure O/B (select models) in Installer Setup. F LED is energized when terminal is powered. G L terminal is powered continuously when thermostat is in Em. Ht. position.

G

D

F

D

G

D

F

D

W2

M13157

F

D

B

70-6627 • 52

TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER (CUSTOMER PART NUMBER)

T874G1501 (3600-375)/Q674F1378 T874G1576 (3600-373)/Q674F1402 T874R1368 (3600-368)/Q674L1421

EVCON/COLEMAN

TYPICAL 3700, 3900, 4400, 6500, 7100, 9200 (3600 SERIES THERMOSTAT) ALTERNATIVE REPLACEMENTS

Function

Common

Compressor

D

Power

1st Stage

Heat

Aux. Heat

Fan

Defrost

C/O V alve

Cool

Chronotherm

Electromechanical

Existing

Terminals

or

C/X

XX X X C C C C C C

T841A1712

Y594R1425

RRRR R RRRRR

YYYY1

W1 – W1 W1 W1 W1 W1 W1 W1 –

W2 W2 W2 W2 W2 W2 W2 W2 W2 Aux.

GGGG G GGGGG

K

BBBB B BBBBB

K

O O O O O O O or

E

Y594G1419

Y594G1476

E

T8611R1000

Y1

®

III

T8611G1004

or

Y

E

Chronotherm

IV

E

T8611G2002

T8611G2028

E

AA

O/B O/B

T8411R1002

T8411R1028

T8511G1021

T8511G1047

T8011R1006

T8011R1014

YY1 Y Y1

E

O/B

OO or

PC8900/

W8900B1002

Y1/W1

L

A

Electronic Replacement or Upgrade

System Monitor/

LLX1LLLLLL

BB

System Defrost

EM. Heat

Multiple Aux.

Heat Loads

LED

Indication

EM. Heat

2nd Stage

C

EEEE E EEEEE

–

––

P

W3 W3 W3

G

X2 X2 X1 X2

–

––

G

–––– – ––––

Compressor

A Configure O/B (select models) in Installer Setup. B LED is energized when terminal is powered. C Terminal is for multiple auxiliary heat loads such as contactors, sequencers,

or relays.

D Terminal X (C) must be connected to transformer common. E Do not remove factory-installed jumper. F Optional CHECK LED on T8611G1004. See Fig. 26.

I

H

F

J

P–––

G Field-installed X2 to X jumper (provided). H If multiple auxiliary heat loads are used, connect to W2 (Aux W8900B)

terminal.

I L terminal is powered continuously when thermostat is in Em. Ht. position. J Defrost is available on T8611R1000 only. K Models 3700, 3900 and 6500 require connection of O and B terminals. L When W2 is not used, configure W2 cycle rate to NC.

H

–– –

B

H

IBIB

HHH

X1 X2

–

L

W2

M13174

TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER (CUSTOMER PART NUMBER)

T8611R1059 (3600A-381)

70-6627 • 53

FEDDERS

Function

Common

Compressor

A

Power

1st Stage

Heat

Auxiliary

Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

Electronic Replacement or Upgrade

III

®

Chronotherm

IV

T8411R1002

T8411R1028

A

B

A

B

T8511G1021

T8511G1047

T8011R1006

T8011R1014

A

B

FF

O/B

F

O/B

BB or

OO or

T8611G2002

T8611G2028

AA

B

PC8900/

W8900B1002

Y1/W1

B

–

O/B O/B

F

O/B O/B

A

D

G

F

Chronotherm

Electromechanical

Existing

Terminals

CXXCCCCCC

or

Rc Rh

or

Y1

Y Y Y1 Y1 Y Y1 Y Y1

W1 W1 W1 W1 W1 W1 W1 W1

W2 W2 W2 W2 W2 W2 W2 W2 Aux.

GGGGGGGGG

–BBBBB or

–OOOOO or

NOT

AVAILABLE

Y594R1425

Y594G1419

Y594G1476

T8611R1000

RRRRRRRRR

B

NOT AVAILABLE

System Monitor/

L or Z L X1 L L L L L L

System Defrost

Em. Heat

Multiple Aux.

Heat Loads

LED

Indication

2nd Stage

C

KEEEEEEEE

–

W3 W3

E

X2 X2

E

––––––––

Compressor

A Terminal X (C) must be connected to transformer common. B Remove factory-installed Y1 (Y) to W1 jumper. C Terminal is for multiple auxiliary heat loads such as contactors, sequencers or

relays.

D Install R8222D1014 (see page 12) if separateY1 and W1 terminals are

required.

TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER (CUSTOMER PART NUMBER)

T872C/Q672L1102 T874C/Q674L1090 T874D1249

T874D1462/Q674E1205 (THTX-220-AOHB; 88-58-00550-001) T874R1269/Q674L1066 (THTX-120-HEHB; 88-58-00540-001) T874R1343/Q674L1413 (THTX-120-HEHC; 88-58-00560-001)

IHH

I

H

I

H

––––––

––––

X1 X2

–

G

W2

E Field-installed X2 to X (C) jumper. F Configure O/B (select models) in Installer Setup. G When W2 is not used, configure W2 cycle rate to NC. H LED is energized when terminal is powered. I L terminal is powered continuously when thermostat is in Em. Ht. position.

M13158

70-6627 • 54

FLORIDA HEAT PUMP

TYPICAL “LT” UNITS

Function

Common

Compressor

E

Power

1st Stage

Heat

Aux. Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

Chronotherm

Electromechanical

Existing

Terminals

T841A1712

Y594R1425

Y594G1419

Y594G1476

CXXX C CCCCC

RRRR R RRRRR

YYYY1

F

– – W1 W1 W1 W1 W1 W1 W1 –

W

W2 W2 W2 W2 W2 W2 W2 W2 Aux.

GGGG G GGGGG

–

or

W

O O O O O O O or

BBB B BB or

T8611R1000

Y1

®

III

T8611G1004

or

Y

F

Chronotherm

IV

F

T8611G2002

T8611G2028

F

AA

O/B O/B

AA

O/B O/B

T8411R1002

T8411R1028

T8511G1021

T8511G1047

T8011R1006

T8011R1014

YY1 Y Y1

F

O/B

BB or

OO or

PC8900/

W8900B1002

Y1/W1

J

A

Electronic Replacement or Upgrade

System Monitor/

XLX1LLLLLL

System Defrost

EM. Heat

Multiple Aux.

Heat Loads

LED

Indication

2nd Stage

C

–EEE E EEEEE

–

D

W3 W3 W3 – – – – – –

––

D

H

X2 X2 X1 X2

–––– – ––––

D

H

Compressor

A Configure O/B (select models) in Installer Setup. B LED is energized when terminal is powered. C Terminal is for multiple second stage heating loads such as contactors,

sequencers, or relays.

D E-W2 jumper required unless emergency heat function is wired separately. E Terminal X (C) must be connected to transformer common.

BIBBI

D

G

F Do not remove factory-installed jumper. G Optional CHECK LED on T8611G1004. See Fig. 26. H Field-installed X2 to X jumper (provided). I L terminal is powered continuously when thermostat is in Em. Ht. position. J When W2 is not used, configure W2 cycle rate to NC.

D

–– –

D

I

D

B

D

X1 X2

B

D

–

W2

M13175

J

70-6627 • 55

FRIEDRICH

Function

Common

Compressor

E

Power

1st Stage

Heat

Aux. Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

Chronotherm

Electromechanical

Existing

Terminals

T841A1712

Y594R1425

Y594G1419

Y594G1476

XXXX C CCCCC

RRRR R RRRRR

YYYY1

F

– – W1 W1 W1 W1 W1 W1 W1 –

W2 W2 W2 W2 W2 W2 W2 W2 W2 Aux.

GGGG G GGGGG

BBBB

O O O O O O O or

T8611R1000

Y1

®

III

T8611G1004

or

Y

F

T8411R1002

T8411R1028

YY1 Y Y1

B B B or

T8511G1021

F

T8511G1047

T8011R1006

F

O/B

Chronotherm

T8011R1014

BB or

OO or

T8611G2002

F

IV

T8611G2028

F

AA

O/B O/B

AA

O/B O/B

PC8900/

W8900B1002

Y1/W1

J

A

Electronic Replacement or Upgrade

System Monitor/

LLX1LLLLLL

B

System Defrost

EM. Heat

Multiple Aux.

Heat Loads

LED

Indication

2nd Stage

C

EEEE E EEEEE

W3 W3 W3 W3

––

H

X2 X2 X1 X2

–––– – ––––

Compressor

A Configure O/B (select models) in Installer Setup. B LED is energized when terminal is powered. C Terminal is for multiple second stage heating loads such as contactors,

sequencers, or relays.

D If multiple auxiliary heat loads are used, connect to W2 (Aux W8900)

terminal.

I

D

GH

E Terminal X (C) must be connected to transformer common. F Do not remove factory-installed jumper. G Optional CHECK LED on T8611G1004. See Fig. 26. H Field-installed X2 to X jumper (provided). I L terminal is powered continuously when thermostat is in Em. Ht. position. J When W2 is not used, configure W2 cycle rate to NC.

IB

DD

–– –

B

D

I

D

B

D

X1 X2

B

–

J

W2

M13179

70-6627 • 56

TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER (CUSTOMER PART NUMBER)

T841A1324 (AT12124)

GENERAL ELECTRIC

Function

Common

Compressor

A

Power

1st Stage

Heat

Aux. Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

Chronotherm

Electromechanical

Existing

Terminals

or

C

BB B B C C C C C C

T841A1555

Y594R1763

Y594G1161

RRRR R RRRRR

YYYY1

––

or

W1

WW W W

––

GGGG G GGGGG

––

– – B B B or

O O O O O O O or

T8611R1000

Y1

W1 W1 W1 W1 W1 –

®

III

T8611G1004

or

Y

C

T8411R1002

T8411R1028

T8511G1021

T8511G1047

T8011R1006

T8011R1014

YY1 Y Y1

CC

Chronotherm

T8611G2002

C

IV

PC8900/

T8611G2028

C

W8900B1002

Y1/W1

W2 W2 W2 W2 W2 Aux.

EE

O/B

BB or

OO or

O/B O/B

EE

O/B O/B

I

E

Electronic Replacement or Upgrade

System Monitor/

FFFF L LLLLL

G

System Defrost

EM. Heat

Outdoor

B

––

TTTT

Sensor

or

W2

X2 X2 X2 X2

– –

– – X1 X2

–––– – ––––

Thermostat

LED

Indication

2nd Stage

Outdoor

Compressor

A Terminal X (C) must be connected to transformer common. B Tape off. Electric thermostat replaces outdoor reset with improved zero droop

performance.

C Do not remove factory-installed jumper. D Optional CHECK LED on T8611G1004. See Fig. 26. E Configure O/B (select models) in Installer Setup.

H

––

B

G

H

GHGG

–––

B

BBB

EEEEEE

D

F Optional LED indication activated with completed circuit on X1 and

X2 terminals.

G LED is energized when terminal is powered. H L terminal is powered continuously when thermostat is in Em. Ht. position. I When W2 is not used, configure W2 cycle rate to NC.

–– –

F

X1 X2

–

I

W2

M13180

3AAT86B1A1 3AAT80A1A1 3AAT80B1A1

TYPICAL THERMOSTATS AND SUBBASES — CUSTOMER PART NUMBER

3AAT83F1B2 3AAT83E12A1

70-6627 • 57

GENERAL ELECTRIC

Function

Common

Compressor

B

Power

1st Stage

Heat

Aux. Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

Chronotherm

Electromechanical

Existing

Terminals

or

C

BX X X C C C C C C

T841A1712

Y594R1425

Y594G1419

Y594G1476

RRRR R RRRRR

Y Y Y1 Y1

E

– – W1 W1 W1 W1 W1 W1 W1 –

or

W1

W

W2 W2 W2 W2 W2 W2 W2 W2 Aux.

GGGG G GGGGG

–

BBB B BB or

O O O O O O O or

T8611R1000

Y1

®

III

T8611G1004

or

Y

E

Chronotherm

IV

T8411R1002

T8411R1028

T8511G1021

T8511G1047

T8011R1006

T8011R1014

YY1 Y Y1

E

O/B

BB or

OO or

E

T8611G2002

T8611G2028

E

II

O/B O/B

II

O/B O/B

PC8900/

W8900B1002

Y1/W1

J

I

Electronic Replacement or Upgrade

System Monitor/

or

F

LLX1LLLLLL

K

System Defrost

EM. Heat

Outdoor

Sensor

Outdoor

Thermostat

Defrost Control

Multiple Aux.

Heat Loads D

LED

Indication

2nd Stage

E

or

–

T

X2

––

A

––

A

EEE E EEE EE

–––– P –––––

W2 W3 W3 W3

––

X2 X2 X1 X2

G

–––– – ––––

Compressor

A Tape off. Outdoor reset not provided with TRADELINE® replacement

thermostats.

B Terminal X (C) must be connected to transformer common. C Tape off. Electronic thermostat replaces outdoor reset with improved zero droop

performance.

D Terminal is for multiple auxiliary heat loads such as contactors, sequencers,

or relays.

E Do not remove factory-installed jumper.

L

––

CCCCCC

H

F

F Optional CHECK LED on T8611G1004. See Fig. 26. G Field-installed X2 to X jumper (provided). H If multiple auxiliary heat loads are used, connect to W2 (Aux W8900B)

terminal.

I Configure O/B (select models) in Installer Setup. J When W2 is not used, configure W2 cycle rate to NC. K LED is energized when terminal is powered. L L terminal is powered continuously when thermostat is in Em. Ht. position.

–– –

K

L

KLK

–––

H

HHH

X1 X2

–

J

W2

M13181

70-6627 • 58

GEO SYSTEM

Function

Common

Compressor

D

Power

1st Stage

Heat

Aux. Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

Chronotherm

Electromechanical

Existing

Terminals

T841A1712

Y594R1425

Y594G1419

Y594G1476

XXXX C CCCCC

RRRR R RRRRR

YYYY1

EE

– – W1 W1 W1 W1 W1 W1 W1 –

W2 W2 W2 W2 W2 W2 W2 W2 W2 Aux.

GGGG G GGGGG

B B B B B B B or

O O O O O O O or

T8611R1000

Y1

®

III

T8611G1004

or

Y

E

Chronotherm

IV

E

T8611G2002

T8611G2028

E

AA

O/B O/B

AA

O/B O/B

T8411R1002

T8411R1028

T8511G1021

T8511G1047

T8011R1006

T8011R1014

YY1 Y Y1

E

O/B

BB or

OO or

PC8900/

W8900B1002

Y1/W1

K

A

Electronic Replacement or Upgrade

System Monitor/

LLX1LLLLLL

J

System Defrost

EM. Heat

Multiple Aux.

Heat Loads C

LED

Indication

2nd Stage

EEEE E EEEEE

W3 W3 W3 W3

––

X2 X2 X1 X2

G

–––– – ––––

Compressor

A Configure O/B (select models) in Installer Setup. B Terminal X (C) must be connected to transformer common. C Terminal is for multiple auxiliary heat loads such as contactors, sequencers,

or relays.

D Terminal must be connected to the transformer common. E Do not remove factory-installed jumper. F Optional CHECK LED on T8611G1004. See Fig. 26.

I

H

F

G Field-installed X2 to X jumper (provided). H If multiple auxiliary heat loads are used, connect to W2 (Aux W8900B)

terminal.

I L terminal is powered continuously when thermostat is in Em. Ht. position. J LED is energized when terminal is powered. K When W2 is not used, configure W2 cycle rate to NC.

H

–– –

J

H

I

H

JIJ

H

X1 X2

H

–

K

W2

M13182

TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER

T841A1118

70-6627 • 59

HEAT CONTROLLER/COMFORT AIR

Function

Common

Compressor

E

Power

1st Stage

Heat

Aux. Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

Chronotherm

Electromechanical

Existing

Terminals

T841A1712

Y594R1425

Y594G1419

Y594G1476

CXXX C CCCCC

RRRR R RRRRR

B

W1

YYY1

F

– – W1 W1 W1 W1 W1 W1 W1 –

W2 W2 W2 W2 W2 W2 W2 W2 W2 Aux.

GGGG G GGGGG

– B B B B B B or

Y1 O O O O O O or

T8611R1000

Y1

®

III

T8611G1004

or

Y

F

Chronotherm

IV

T8411R1002

T8411R1028

T8511G1021

T8511G1047

T8011R1006

T8011R1014

YY1 Y Y1

FF

O/B

BB or

OO or

F

T8611G2002

T8611G2028

F

AA

O/B O/B

AA

O/B O/B

PC8900/

W8900B1002

Y1/W1

G

A

Electronic Replacement or Upgrade

System

XL LLLLLL

I

Monitor

EM. Heat

Multiple Aux.

D

EEEE E EEEEE

–

W3 W3 W3 – – – – – –

Heat Loads C

LED

Indication

2nd Stage

––

X2 X1 X2 X1 X2

–––– – ––––

H

Compressor

2nd Stage

–––– – ––––

Cool

A Configure O/B (select models) in Installer Setup. B Both first stage heat and cool are connected to Y terminal. C Terminal is for multiple second stage loads such as contactors, sequencers,

or relays.

D If provided on original equipment. E Terminal X (C) must be connected to transformer common.

IIJIJJ

H

–– –

X1 X2

H

–

G

W2

Y2

F Do not remove factory-installed jumper. G When W2 is not used, configure W2 cycle rate to NC. H Optional LED indication activated with completed circuit on X1 and

X2 terminals.

I LED is energized when terminal is powered. J L terminal is powered continuously when thermostat is in Em. Ht. position.

M13217

70-6627 • 60

TYPICAL THERMOSTATS AND SUBBASES—HONEYWELL MODEL NUMBER

T874G1469/Q674F1345

HEATWAVE/SOUTHWEST MFG.

Function

Common

Compressor

D

Power

1st Stage

Heat

Aux. Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

Chronotherm

Electromechanical

Existing

Terminals

T841A1712

Y594R1425

XXXX C CCCCC

RRRR R RRRRR

B

YYYY1

– – W1 W1 W1 W1 W1 W1 W1 –

W2 W2 W2 W2 W2 W2 W2 W2 W2 Aux.

GGGG G GGGGG

– B B B B B B or

O O O O O O O or

E

Y594G1419

Y594G1476

E

T8611R1000

Y1

®

III

T8611G1004

or

Y

E

Chronotherm

IV

T8411R1002

T8411R1028

T8511G1021

T8511G1047

T8011R1006

T8011R1014

YY1 Y Y1

E

O/B

BB or

OO or

E

T8611G2002

T8611G2028

E

AA

O/B O/B

AA

O/B O/B

PC8900/

W8900B1002

Y1/W1

G

A

Electronic Replacement or Upgrade

System

––L– L LLLLL

Monitor

EM. Heat

Multiple Aux.

Heat Loads C

LED

Indication

Defrost

2nd Stage

EEEE E EEEEE

–

W3 W3 W3 – – – – – –

F

X2 X1 X2 X1 X2

B––– – –––––

–––– – ––––

Compressor

2nd Stage

–––– – ––––

Cool

A Configure O/B (select models) in Installer Setup. B Both first stage heat and cool are connected to Y terminal. C Terminal is for multiple second stage loads such as contactors, sequencers,

or relays.

D Terminal X (C) must be connected to transformer common.

F

–– –

E Do not remove factory-installed jumper. F Optional LED indication activated with completed circuit on X1 and

X2 terminals.

G When W2 is not used, configure W2 cycle rate to NC.

F

X1 X2 –

G

W2

Y2

M13218

T872G1232/Q672F1224 T874G1105/Q674F1097 T874G1105/Q674F1170

TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER

70-6627 • 61

HONEYWELL

UNIVERSAL

Function

Common

Compressor

D

Power

B

1st Stage

Heat

Aux. Heat

Fan

C/O V alve

Heat

I

C/O V alve

Cool

I

®

III

T8611G1004

T8411R1002

T8411R1028

T8511G1021

T8511G1047

T8011R1006

Existing

Terminals

Electromechanical

T841A1712

Y594R1425

Y594G1419

Y594G1476

Chronotherm

T8611R1000

XXXX C CCCCC

RRRR R RRRRR

Y1 or YY Y Y1

F

W1

W or

W2 W2 W2 W2 W2 W2 W2 W2 W2 Aux.

–

F

W1 W1 W1 W1 W1 W1 W1 –

F

or

Y1

Y

F

YY1 Y Y1

FF

GGGG G GGGGG

B B B B B B B or

O O O O O O O or

O/B

Chronotherm

T8011R1014

BB or

OO or

T8611G2002

F

IV

PC8900/

T8611G2028

F

AA

O/B O/B

AA

O/B O/B

W8900B1002

Y1/W1

L

A

Electronic Replacement or Upgrade

System

L1 or X1

or

L

LLLLLLL

Monitor

EM. Heat

Multiple Aux.

EEEE E EEEEE

W3 W3 W3 W3 –

Heat Loads C

LED

Indication

2nd Stage

X2

–

X2 X1 X2 X1 X2

–––– – ––––

H

Compressor

2nd Stage

–––– – ––––

Cool

A Configure O/B (select models) in Installer Setup. B For best performance, use a NEMA standard transformer. C Terminal is for multiple second stage heating loads such as contactors,

sequencers, or relays.

D Terminal X (C) must be connected to transformer common. E If multiple auxiliary heat loads are used, connect to W2 (Aux W8900B)

terminal.

F Do not remove factory-installed jumper.

TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER

T841A1084 T841A1282 T841A1290 T841A1340 T841A1563 T872G1000/Q672F1018 T872G1224/Q672F1208

T872R1008/Q672B1046 T872R1057/Q672L1037 T874G1113/Q674L1041 T874G1139/Q674A T874G1212/Q674F1238 T874G1246/Q674F1212 T874G1246/Q674F1410

K

E

G

G Optional CHECK LED. See Fig. 26. H Optional LED indication activated with completed circuit on X1 and

X2 terminals.

I Thermostat will have connection to either O or B terminal, not both. J LED is energized when terminal is powered. K L terminal is powered continuously when thermostat is in Em. Ht. position. L When W2 is not used, configure W2 cycle rate to NC.

T874G1444/Q674J1027 T874G1626/Q674F1436 T874R1004/Q674B1042 T874R1004/Q674B1109 T874R1061/Q674L1082 T874R1152/Q674L1207 T874R1285/Q674L1157

EE

–– –

J

E

K

E

T874R1350/Q674L1181 T874R1376/Q674L1207 T874R1392/Q674L1447 T874R1475/Q674L1520 T874R1491/Q674L1553

JKJJ

E

H

X1 X2

–

W2

Y2

M13186

L

70-6627 • 62

HONEYWELL

SEPARATE FIRST STAGE HEAT AND COOL TERMINALS

Function

Common

Power

1st Stage

Cool

1st Stage

Heat

2nd Stage

Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

A

Electronic Replacement or Upgrade

III

Y1

®

Chronotherm

IV

T8411R1002

T8411R1028

T8511G1021

T8511G1047

T8011R1006

T8011R1014

T8611G2002

T8611G2028

YY1 Y Y1

G

O/B

G

BB or

OO or

PC8900/

W8900B1002

Y1/W1

G

EE

O/B O/B

EE

O/B O/B

D

C

E

Chronotherm

Electromechanical

Existing

Terminals

XXXCCCCCC

RRRRRRRRR

Y1 Y1 Y1

W1 W1 W1 W1 W1 W1 W1 W1

W2 W2 W2 W2 W2 W2 W2 W2 Aux.

GGGGGGGGG

B

BBBBBB or

B

O O O O O O or

NOT

AVAILABLE

NOT AVAILABLE

Y594R1425

G

Y594G1419

Y594G1476

G

T8611R1000

System

X2

or

L

X1 L L L L L L

B

Monitor

EM. Heat

Defrost

2nd Stage

Z or E E E E E E E E E

–––P–––––

B

Y2 –

–

Cool

Multiple Aux.

Heat Loads

LED

Indication

2nd Stage

F

–W3W3

–

X2 X1 X2

––––

––––––––

Compressor

2nd Stage

––––––––

Cool

A Terminal X (C) must be connected to transformer common. B If provided on original equipment. C When W2 is not used, configure W2 cycle rate to NC. D If separate Y1 and W1 terminals are required, install R8222D1014; see page 12. E Select O/B (select models) in Installer Setup.

T872A-D/Q672F1000 T872A-D/Q672F1026

TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER

T872A-D/Q672F1042 T872C/Q672F1075

T874A-D/Q674F1006 T874A-D/Q674F1022

–––––Y2

––––––

X1 X2

–

W2

C

Y2

F Terminal is for multiple second stage heat loads such as contactors,

sequencers, or relays.

G Remove factory-installed jumper for independent first stage heat and cool

operation.

M13187

T874A-D/Q674F1048 T874A-D/Q674F1089

T874R1616/Q674L1587 T8085A/Q682B1029

T8300A/Q6300A T8300B/Q6300B

70-6627 • 63

HONEYWELL

RETAIL HEAT PUMP THERMOSTATS

Function

Common

Compressor

D

Power

B

1st Stage

Heat

Aux. Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

Chronotherm

Electromechanical

Existing

Terminals

T841A1712

Y594R1425

Y594G1419

Y594G1476

XXXX C CCCCC

RRRR R RRRRR

Y1 Y Y Y1

F

W1

F

–

F

W1 W1 W1 W1 W1 W1 W1 –

W2 W2 W2 W2 W2 W2 W2 W2 W2 Aux.

GGGG G GGGGG

B B B B B B B or

O O O O O O O or

T8611R1000

Y1 or Y

®

III

T8611G1004

F

Chronotherm

IV

T8411R1002

T8411R1028

T8511G1021

T8511G1047

T8011R1006

T8011R1014

YY1 Y Y1

FF

O/B

BB or

OO or

F

T8611G2002

T8611G2028

F

AA

O/B O/B

AA

O/B O/B

PC8900/

W8900B1002

C

Y1/W1

E

A

Electronic Replacement or Upgrade

System

L

G

LLLLLLL

Monitor

EM. Heat

LED

Indication

2nd Stage

EEEE E EEEEE

––

X2 X1 X2

–––– – ––––

Compressor

2nd Stage

–––– – ––––

Cool

A Configure O/B (select models) in Installer Setup. B For best performance, use a NEMA standard transformer. C If separate Y1 and W1 terminals are required, install R8222D1014; see

page 12.

D Terminal X (C) must be connected to transformer common.

H

X1 X2

E When W2 is not used, configure W2 cycle rate to NC. F Do not remove factory-installed jumper. G LED is energized when terminal is powered. H L terminal is powered continuously when thermostat is in Em. Ht. position.

H

–– –

H

X1 X2

GGG

–

E

W2

Y2

M13188

70-6627 • 64

TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER

CT70A1001

CT8611R1006

HONEYWELL

MODELS USING OUTDOOR RESET

Function

Common

Power

Compressor

1st Stage

Aux. Heat

Outdoor

Thermistor

AB

Heat

Fan

Chronotherm

Electromechanical

Existing

Terminals

T841A1555

Y594R1763

Y594G1161

BBBB C CCCCC

RRRR R RRRRR

YYYY

––––

WWWW

GGGG G GGGGG

TTTT

T8611G1004

Y1 or Y

W1 W1 W1 W1 W1 –

®

III

T8611R1000

D

T8411R1002

T8411R1028

T8511G1021

T8511G1047

T8011R1006

T8011R1014

YY1 Y Y1

DD

Chronotherm

T8611G2002

D

IV

T8611G2028

D

PC8900/

W8900B1002

Y1/W1

W2 W2 W2 W2 W2 Aux.

E

F

Electronic Replacement or Upgrade

Outdoor

X2 X2

Thermostat

Cooling

O

OOO O OO or

Changeover

System

FFFF L LLLLL

G

Monitor

2nd Stage

–––– – ––––

Compressor

2nd Stage

–––– – ––––

Cool

A For best performance, use a NEMA standard transformer. B Terminal B (C) must be connected to transformer common. C Configure O/B (select models) in Installer Setup. D Leave factory-installed jumper in place.

EEEEEE

CC

O/B

G

H

G

OO or

H

O/B O/B

G

W2

C

G

F

Y2

E No connection. Tape off. F When W2 is not used, configure W2 cycle rate to NC. G LED is energized when terminal is powered. H L terminal is powered continuously when thermostat is in Em. Ht. position.

M13189

T874R1566/Q674L1538 T841A1068 T874R1053/Q674L1140

TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER

70-6627 • 65

HONEYWELL

HEATING CHANGEOVER

Function

Common

Compressor

E

Power

1st Stage

Heat

Aux. Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

Chronotherm

Electromechanical

Existing

Terminals

T841A1712

Y594R1425

Y594G1419

Y594G1476

XXXX C CCCCC

RRRR R RRRRR

Y1 or Y

or

C

YYY1

D

––

W1 W1 W1 W1 W1 W1 W1 –

D

W2 W2 W2 W2 W2 W2 W2 W2 W2 Aux.

GGGG G GGGGG

W1

BBB B BB or

– O O O O O O or

T8611R1000

Y1 or Y

®

III

T8611G1004

D

Chronotherm

IV

T8411R1002

T8411R1028

T8511G1021

T8511G1047

T8011R1006

T8011R1014

YY1 Y Y1

D

1

O/B

1

O/B

BB or

OO or

D

T8611G2002

T8611G2028

D

1

O/B O/B

1

O/B O/B

PC8900/

W8900B1002

Y1/W1

B

1

Electronic Replacement or Upgrade

System

LL LLLLLL

Monitor

Em. Heat

E

or

K

EEE

Multiple Aux.

Heat Loads

LED

Indication

C

2nd Stage

W3 W3 W3 W3

––

X2 X1 X2

H

I

–––– – ––––

Compressor

2nd Stage

–––– – ––––

Cool

A Configure O/B (select models) in Installer Setup. B When W2 is not used, configure W2 cycle rate to NC. C Terminal is for multiple second stage heating loads such as contactors,

sequencers, or relays.

D Leave factory-installed jumper in place. E Terminal X (C) must be connected to transformer common. F If multiple auxiliary heat loads are used, connect to W2 (Aux W8900B)

terminal.

K

J

KJ

J

EEEEEE

F

X1 X2

F

G

–– –

F

I

X1 X2

F

–

W2

B

Y2

G Optional CHECK LED on T8611G1004. See Fig. 26. H Field-installed X2 to X jumper (provided). I Optional LED indication activated with completed circuit on X1 and

X2 terminals.

J LED is energized when terminal is powered. K L terminal is powered continuously when thermostat is in Em. Ht. position.

M13190

70-6627 • 66

TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER

T872N1002/Q672F1133 T872N1028/Q672F1216 T874N1016/Q674F1220 T874N1040/Q674F1261

Existing Control Terminal Designation

HONEYWELL

UNIVERSAL THERMOSTATS

Electronic Replacement or Upgrade

Chronotherm IV

Function

Common

Compressor

System Monitor/

Sytem Defrost

B

Power

1st Stage

Heat

Auxiliary

Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

PC8900/

W8900B1002

Q6300A1002

Q6300A1010

T8611R1000

T8611R1158

T8611G1004

T8011R1006

T8011R1014

T8611G2002

T8611G2028

XXCB C C C C

RRRRR R R R

Y Y Y1 Y1 Y Y Y1

A

–W1W1W1

A

–

AA

W1 W1

A

W2 W2 W2 W2 W2 W2 W2 Aux.

Y1/W1

–

F

GGGGG G G G

B B B H B B B or

O O O O O O O or

LLLLL L L L

H

C

O/B O/B

C

O/B O/B

GH

C

G

Em. Heat

Multiple

EEEEE E E E

––

E

Heat Loads

LED Indication

Defrost

2nd Stage

––––

P–P– – – – –

––––– – –

Compressor

2nd Stage

I

Cool

A Remove factory-installed jumper for independent first stage heat and cool

operation.

B Terminal must be connected to the transformer common. C Configure O/B (select models) in Installer Setup. D Optional LED indication activated with completed circuit on X1 and

X2 terminals.

T874R1491/Q674L1553 T874G1600/Q674F1428 T8085R1015/Q682L1010 T8300A1003/Q6300A1010 T8300A1011/Q6300A1002 T8300A1045/Q6300A1002 T8300A1029/Q6300A1036 T8300A1037/Q6300A1044 T8300B1001/Q6300B1000 T8611R1000 T8611G1004

––––– – –

TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER

E

X1 X2

E

D

–

E

X1 X2

D

E

–

W2

F

Y2

E If multiple auxiliary heat loads are used, connect to W2 (Aux W8900B)

terminal.

F When W2 is not used, configure W2 cycle rate to NC. G LED is energized when terminal is powered. H L terminal is powered continuously when thermostat is in Em. Ht. position. I If Y2 is used, T8611M may be used as replacement.

M13244

70-6627 • 67

INTERCITY PRODUCTS/HEIL QUAKER/WHIRLPOOL/TEMPSTAR

Function

Common

Compressor

A

Power

1st Stage

Heat

Auxiliary

Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

Electronic Replacement or Upgrade

T8411R1028

T8511G1021

T8511G1047

T8011R1006

T8011R1014

Chronotherm

IV

T8611G2002

T8611G2028

PC8900/

W8900B1002

Existing

Terminals

Electromechanical

NOT

AVAILABLE

Y594R1425

Y594G1419

Y594G1476

Chronotherm

III

T8611R1000

®

T8411R1002

XXXCCCCCC

RRRRRRRRR

Y Y Y1 Y1 Y Y1 Y Y1

B

F

Y1/W1

W1 W1 W1 W1 W1 W1 W1 W1

W2 W2 W2 W2 W2 W2 W2 W2 Aux.

G

GGGGGGGGG

NOT AVAILABLE

BBBBBB or

OOOOOO or

DD

O/B

D

O/B

BB or

OO or

O/B O/B

D

O/B O/B

D

System Monitor/

LL LLLLLL

H

System Defrost

Em. Heat

Multiple Aux.

Heat Loads

LED

Indication

Defrost

2nd Stage

C

EEEEEEEEE

W3 W3 W3

–

X2 X1 X2

P––P–––––

––––––––

Compressor

A Terminal X (C) must be connected to transformer common. B Remove factory-installed Y1 (Y) to W1 jumper. C Terminal is for multiple auxiliary heat loads such as contactors, sequencers or

relays.

D Configure O/B (select models) in Installer Setup. E If multiple auxiliary heat loads are used, connect to W2 (W8900B) terminal.

TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER (CUSTOMER PART NUMBER)

T874R1947/Q674L1819 (HQ1149406HW/HQ1149407HW)

T8611R1190 (HQ1149375HW)

II

E

I

E

––––

F If separate Y1 and W1 terminals are required, install R8222D1014. See

page 12.

G When W2 is not used, configure W2 cycle rate to NC. H LED is energized when terminal is powered. I L terminal is powered continuously when thermostat is in Em. Ht. position.

H

E

H

E

X1 X2

H

E

–

G

W2

M13159

70-6627 • 68

INTERCITY PRODUCTS/HEIL QUAKER/WHIRLPOOL/TEMPSTAR

Function

Common

Compressor

E

Power

1st Stage

Heat

Aux. Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

Chronotherm

Electromechanical

Existing

Terminals

T841A1712

Y594R1425

Y594G1419

Y594G1476

C or BX X X C C C C C C

RR RR R RR R R R

B

YY YY1

F

–

or

W2

W W2 W2 W2 W2 W2 W2 W2 W2 Aux.

–

W1 W1 W1 W1 W1 W1 W1 –

F

GGGG G GG G G G

B B B B B B B or

O O O O O O O or

T8611R1000

Y1

®

III

T8611G1004

or

Y

F

Chronotherm

IV

F

T8611G2002

T8611G2028

F

A

O/B O/B

AA

O/B O/B

T8411R1002

T8411R1028

T8511G1021

T8511G1047

T8011R1006

T8011R1014

YY1 Y Y1

F

A

O/B

BB or

OO or

PC8900/

W8900B1002

Y1/W1

H

A

Electronic Replacement or Upgrade

System

X or LL LLLLLL

I

Monitor

EM. Heat

Multiple Aux.

Heat Loads C

LED

Indication

Defrost

2nd Stage

X or EE E E E E E E E E

W3 W3 W3 W3 – – – – – –

X1

X2

–

X2 X1 X2 X1 X2

G

P– – – P –– – – –

–– –– – –– – –

Compressor

2nd Stage

–– –– – –– – –

Cool

A Configure O/B (select models) in Installer Setup. B Both first stage heat and cool are connected to Y terminal. C Terminal is for multiple second stage loads such as contactors, sequencers,

or relays.

D L terminal is powered continuously when thermostat is in Em. Ht. position. E Terminal X (C) must be connected to transformer common.

D

G

F Do not remove factory-installed jumper. G Optional LED indication activated with completed circuit on X1 and

X2 terminals.

H When W2 is not used, configure W2 cycle rate to NC. I LED is energized when terminal is powered.

D

–– –

D

G

X1 X2 –

III

H

W2

Y2

M13185

T841A1134 (HQ1147021HW)

TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER (CUSTOMER PART NUMBER)

T841A1175 (HQ1147004HW) T841A1589 (HQ1149480HW) T872R1172/Q672L1193 T874G1246/Q674F1212 T874R1137/Q674L1132 (HQ711597HW/711598)

T874R1673/Q674L1132 (HAXB004TW01/711598) T874R1749/Q674F1329 (TAXB004TW01/712005) T874R1749/Q674L1132 (TAXB004TW01/711598) T874R1731/Q674L1132 (HQ1147909HW/711598) T8141A1022 T8141A1030

T8141A1048 T8141A1055 T8141A1139 T8300A1136/Q6300A1119

(HQ713669HW)

T8611G1020 (HQ713669HW)

70-6627 • 69

INTERTHERM/MILLER/NORDYNE

Function

Common

Compressor

D

Power

1st Stage

Heat

Aux. Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

Chronotherm

Electromechanical

Existing

Terminals

T841A1308

Y594R1797

Y594G1633

XXXX C CCCCC

RRRR R RRRRR

YYYY

––––

W2 W2 W2 W2 W2 W2 W2 W2 W2 Aux.

GGGG G GGGGG

W1

BBB B BB or

H

– O O O O O O or

T8611R1000

Y1 or Y

W1 W1 W1 W1 W1 –

®

III

T8611G1004

E

H

Chronotherm

IV

E

H

T8611G2002

T8611G2028

E

H

1

O/B O/B

1

O/B O/B

T8411R1002

T8411R1028

T8511G1021

T8511G1047

T8011R1006

T8011R1014

YY1 Y Y1

EE

H

1

O/B

1

O/B

BB or

OO or

PC8900/

W8900B1002

Y1/W1

B

H

1

Electronic Replacement or Upgrade

System

ZLLL L LLLLL

C

Monitor

Em. Heat

LED

Indication

2nd Stage

K

EEE

––––

–––– – ––––

Compressor

2nd Stage

–––– – ––––

Cool

A Configure O/B (select models) in Installer Setup. B When W2 is not used, configure W2 cycle rate to NC. C LED is energized when terminal is powered. D Terminal X (C) must be connected to transformer common. E Do not remove factory-installed jumper.

C

G

C

G

C

EEEEEE

F

X1 X2

–– –

X1 X2

–

B

W2

Y2

F Optional LED indication activated with completed circuit on X1 and

X2 terminals.

G L terminal is powered continuously when thermostat is in Em. Ht. position. H To eliminate auto fan in emergency heat mode, add switching relay as

shown on page 9.

M13191

70-6627 • 70

INTERTHERM/MILLER/NORDYNE

Function

Common

Compressor

C

Power

1st Stage

Heat

Aux. Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

System

Monitor

Chronotherm

Electromechanical

Existing

Terminals

T841A1712

Y594R1425

Y594G1419

Y594G1476

X or C X X X C C C C C C

RRRR R RRRRR

Y Y Y Y1 Y1 or Y Y Y1 Y Y1

E

––

W1 W1 W1 W1 W1 W1 W1 –

E

W2 W2 W2 W2 W2 W2 W2 W2 W2 Aux.

GGGG G GGGGG

I

B B B B B B B or

O O O O O O O or

LL LLLLLL

K

T8611R1000

®

III

T8611G1004

E

I

J

T8411R1002

T8411R1028

E

I

J

T8511G1021

T8511G1047

E

I

1

O/B

1

O/B

K

Chronotherm

T8011R1006

T8011R1014

E

I

BB or

OO or

J

IV

T8611G2002

T8611G2028

E

I

1

O/B O/B

1

O/B O/B

K

PC8900/

W8900B1002

Y1/W1

B

I

1

K

Electronic Replacement or Upgrade

Em. Heat

E

EEE

Multiple Aux.

Heat Loads

LED

Indication

D

2nd Stage

W3 W3 W3 W3

X2

or

X1

–

G

X2 X1 X2 X1 X2

I

–––– – ––––

Compressor

2nd Stage

–––– – ––––

Cool

A Configure O/B (select models) in Installer Setup. B When W2 is not used, configure W2 cycle rate to NC. C Terminal X (C) must be connected to transformer common. D Terminal is for multiple second stage loads such as contactors, sequencers,

or relays.

E Do not remove factory-installed jumper. F Optional CHECK LED on T8611G1004. See Fig. 26.

EEEEEE

H

F

H

–– –

H

I

X1 X2

H

–

W2

B

Y2

G Field-installed X2 to X jumper provided. H If multiple auxiliary heat loads are used, connect to W2 (Aux W8900B)

terminal.

I Optional LED indication activated with completed circuit on X1 and

X2 terminals.

J L terminal is powered continuously when thermostat is in Em. Ht. position. K LED is energized when terminal is powered.

M13192

70-6627 • 71

INTERTHERM/MILLER/NORDYNE

Function

Common

Compressor

Thermistor

A

Power

1st Stage

Heat

Auxiliary

Heat

Fan

Outdoor

Chronotherm

Electromechanical

Existing

Terminals

B

XBBB C CCCCC

T841A1555

Y594R1763

Y594G1161

RRRR R RRRRR

YYYY1Y1 or Y Y Y1 Y Y1

– – – – W1 W1 W1 W1 W1

W2 W W W W2 W2 W2 W2 W2 Aux.

GGGG G GGGGG

F

TTTT

T8611G1004

®

III

T8611R1000

T8411R1002

T8411R1028

T8511G1021

T8511G1047

T8011R1006

Chronotherm

T8011R1014

IV

T8611G2002

T8611G2028

PC8900/

W8900B1002

Y1/W1

D

–

G

FF

EE

F

E

F

E

F

E

F

E

Electronic Replacement or Upgrade

Em. Heat

F

C/O V alve

K

W1

X2 X2 X2

OOO O OO or

Cool

System Monitor/

ZFFF L LLLLL

H

System Defrost

A For best performance, use a NEMA rated transformer. B Terminal B (C, X) must be connected to transformer common. C Configure O/B (select models) in Installer Setup. D Leave factory-installed jumper W1-Y1 (Y) in place. E Tape off. Electronic thermostat replaces outdoor reset with improved zero

droop performance.

EEEEEE

C

O/B

II

F To eliminate auto fan in EM. Heat mode, see page 9. G Use Aux terminal for Auxiliary heat and configure W2 cycle rate to NC. H LED is energized when terminal is powered. I L terminal is powered continuously when thermostat is in Em. Ht. position.

I

H

OO or

C

O/B O/B

H

M13160

C

H

70-6627 • 72

Electromechanical

Chronotherm

III

JANITROL/TAPPAN

Electronic Replacement or Upgrade

®

Chronotherm

IV

Function

Common

Compressor

D

Power

1st Stage

Heat

Auxiliary

Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

System

Monitor

Existing

Terminals

T841A1712

Y594R1425

Y594G1419

Y594G1476

T8611R1000

T8611G1004

T8411R1002

T8411R1028

T8511G1021

T8511G1047

T8011R1006

T8011R1014

T8611G2002

T8611G2028

PC8900/

W8900B1002

CXXX C CCCCC

RRRR R RRRRR

B

YY Y Y1

E

– – W1 W1 W1 W1 W1 W1 W1

or

Y1

Y Y Y1 Y Y1

E

Y1/W1

E

–

I

OTC or W2 W2 W2 W2 W2 W2 W2 W2 W2 Aux.

GGGG G GGGGG

G

or

W1

B

G

OOOO O OO or

B B B B B or

O/B

A

BB or

A

OO or

A

O/B O/B

A

O/B O/B

A

––L– L LLLLL

EM. Heat

Multiple Aux.

Heat Loads

C

LED Indication

2nd Stage

EEEE E EEEEE

–

––

W3 W3 W3

X2 X1

F

X2 X1

–––– – ––––

Compressor

2nd Stage

–––– – ––––

Cool

A Configure O/B (select models) in Installer Setup. B Both First stage heat and cool are connected to Y terminal. C Terminal is for multiple auxiliary heat loads such as contactors, sequencers,

or relays.

D Terminal must be connected to the transformer common. E Do not remove factory-installed jumper.

TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER (CUSTOMER PART NUMBER)

T872G1109/Q672F1117 (080-13708-52/080-13708-53)

T874G1147/Q674F1139

H

F

X2

F Optional LED indication activated with completed circuit on X1 and

X2 terminals.

G Thermostat will have connection to either O or B terminal, not both. H If multiple auxiliary heat loads are used connect to W2 (Aux W8900B)

terminal.

I When W2 is not used, configure W2 cycle rate to NC.

H

–––

H

F

X1 X2

H

–

I

W2

Y2

M13223

70-6627 • 73

KEEPRITE

Electromechanical

Chronotherm

III

Electronic Replacement or Upgrade

®

Chronotherm

IV

Function

Common

Compressor

D

Power

1st Stage

Heat

Aux. Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

System

Monitor

Existing

Terminals

T841A1712

Y594R1425

Y594G1419

Y594G1476

T8611R1000

T8611G1004

T8411R1002

T8411R1028

T8511G1021

T8511G1047

T8011R1006

T8011R1014

T8611G2002

T8611G2028

PC8900/

W8900B1002

BXXX C CCCCC

RRRR R RRRRR

Y Y Y Y1 Y1 or Y Y Y1 Y Y1

––

W

W2 W2 W2 W2 W2 W2 W2 W2 Aux.

W1 W1 W1 W1 W1 W1 W1 –

E

EE

E

Y1/W1

B

GGGG G GGGGG

1

O/B O/B

1

O/B O/B

1

– B B B B B B or

O O O O O O O or

1

O/B

1

O/B

BB or

OO or

––L– L LLLLL

Em. Heat

X

E

Multiple Aux.

Heat Loads

LED

Indication

C

2nd Stage

–

––

W3 W3 W3 – – – – – –

X2 X1 X2 X1 X2

–––– – ––––

Compressor

2nd Stage

–––– – ––––

Cool

A Configure O/B (select models) in Installer Setup. B When W2 is not used, configure W2 cycle rate to NC. C Terminal is for multiple auxiliary heat loads such as contactors, sequencers,

or relays.

TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER

T874R1814/Q674L1132

EEEEEE

–– –

X1 X2

–

W2

B

Y2

D Terminal X (C,B) must be connected to transformer common. E Leave factory-installed jumper in place.

M13193

70-6627 • 74

LENNOX

TYPICAL HP6 (ALTERNATE)

Function

Common

Compressor

D

Power

1st Stage

Heat

Auxiliary

Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

Chronotherm

Electromechanical

T8611R1000

J

Y594G1419

Y594G1476

J

Existing T erminals

or or or

X2

–

VR

M

–

–R – W1 W1 W1 W1 W1 W1 W1

Y

––XX C CCCCC

I

V/VR V/VR

W1 M1

W2

YY

Y594R1425

I

RR R RRRRR

B

M Y1 Y1 Y1 or Y Y Y1 Y Y1

W2 W2 W2 W2 W2 W2 W2 Aux.

FGFGGG G GGGGG

– –– –

B B B B B or

RY1 – R O O O O O or

®

III

T8611G1004

J

T8411R1002

T8411R1028

J

Chronotherm

IV

PC8900/

W8900B1002

Y1/W1

J

–

O/B O/B

A

O/B O/B

J

T8611G2002

T8611G2028

T8511G1021

T8511G1047

T8011R1006

T8011R1014

J

AA

O/B

A

O/B

BB or

OO or

H

K

A

Electronic Replacement or Upgrade

System Monitor/

–– – –

F

L– L LLLLL

System Defrost

Em. Heat

Multiple Aux.

Heat Loads

LED

Indicator

2nd Stage

E –– –

EE E EEEEE

– – – – – W3

C

– – – –

–

–– – ––––

E

X1 X2 X1 X2

Compressor

A Configure O/B (select models) in Installer Setup. B Both first stage heat and cool are connected to M terminal. C Terminal is for multiple auxiliary heat loads such as contactors, sequencers or

relays.

D Terminal X (C) must be connected to transformer common. E Field-installed E to W2 (Aux) jumper required. F LED is energized when terminal is powered.

TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER

T872G1026/Q672E1019 T872G1067/Q672E1142 (P-8-11222)

T872R1040/Q672B1202 (P-8-11221) T874R1024/Q674B1160

T874G1014/Q674E1148 (24F5801) T874G1154/Q674E1015 T874G1022/Q674E1148 (24F5701)

GG

E

G

E

F

E

F

E

F

E

– –––––

–– –

G L terminal is powered continuously when thermostat is in Em. Ht. position. H If separate Y1 and W1 terminals are required, install R8222D1014; see

page 12.

I If separate transformers are used, replace with one 75 VA transformer as

shown on page 78.

J When replacing models with one compressor terminal (M), jumper Y1 to W1. K When W2 is not used, configure W2 cycle rate to NC.

X1 X2

–

K

W2

M13161

70-6627 • 75

LENNOX

HP6

Electromechanical

Chronotherm

III

Electronic Replacement or Upgrade

®

Chronotherm

IV

Function

Common

Compressor

SystemMonitor/

System Defrost

A

Power

1st Stage

Heat

Auxiliary

Heat

Fan

C/O V alve

Cool

Existing

Terminals

or or

T841B1000

T874C1018

NOT

Q674B1075

AVAILABLE

T8611R1000

T8611G1004

T8411R1002

T8411R1028

T8511G1021

T8511G1047

T8011R1006

T8011R1014

T8611G2002

T8611G2028

PC8900/

W8900B1002

––– X – C C C C C C

R V VR V VR V

Y1

W1 R – W1 W1 W1 W1 W1 W1 W1

W2

GFF G G G G G G G G

–

D

or or

D

RR R R R R R R

M1

YY

E

MY1Y1 Y1YY1YY1

E

W2 W2 W2 W2 W2 W2 W2 Aux.

NOT AVAILABLE

– R O O O O O or

E

C

Y1/W1

E

–

G

BB

O/B

OO or

O/B O/B

B

X1 – – – – L L L L L L

Em. Heat

2nd Stage

Compressor

A Terminal X (C) must be connected to transformer common. B Configure O/B (select models) in Installer Setup. C If separate Y1 and W1 terminals are required, install R8222D1014; see

page 12.

––– – – E E E E E E

––– – – – – – – –

F

W2

D If separate transformers are used, replace with one 75 VA transformer as

shown on page 78.

E When replacing models with one compressor terminal, jumper F Field-installed E to W2 (Aux) jumper required. G When W2 is not used, configure W2 cycle rate to NC.

Y1

to W1.

M13162

F

G

70-6627 • 76

IMPORTANT: Replace separate indoor/outdoor transformers with single 75 VA transformer. See diagram on page 78.

LENNOX

HP9, HP10

Function

Common

D

Indoor

Common

Outside

Power

Indoor

Power

Outside

Compressor

1st Stage

Heat

Auxiliary

Heat

Electronic Replacement or Upgrade

Chronotherm

IV

T8511G1021

T8511G1047

T8011R1006

T8011R1014

T8611G2002

T8611G2028

PC8900/

W8900B1002

Existing

Terminals

Electromechanical

T841A1712

Y594R1425

Y594G1419

Y594G1476

Chronotherm

III

T8611R1000

T8611G1004

®

T8411R1002

T8411R1028

XXXX C CCCCC

X3

VR

I

––– – ––– ––

RRR R RRR RR

V––– – –––––

Y1

MYYY1

E

––

or

W1

Y W2 W2 W2 W2 W2 W2 W2 W2 Aux.

W1 W1 W1 W1 W1 W1 W1

E

or Y Y Y1 Y Y1

E

Y1/W1

E

–

Fan

C/O V alve

FGGG G GGGGG

– B B B B B B or

Heat

C/O V alve

R O O O O O O or

Cool

System Monitor/

C

L L L L L L L L

J

System Defrost

Em. Heat

Thermistor

Multiple Aux.

EEEE E EEEEE

B

A––– – –––––

–W3W3W3 – ––– ––

Heat Loads

LED

Indication

A Configure O/B (select models) in Installer Setup. B Tape off. Not used. C R8222B1067 Relay required to operate system monitor light (emergency

heat LED) on TRADELINE replacement thermostats. See page 10.

D Terminal X (C) must be connected to transformer common. E Do not remove factory-installed jumper. F Optional Check LED on T8611G1004. See Fig. 26.

––

TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER (CUSTOMER PART NUMBER)

T872G1067/Q672L1029 (P-8-11222) T872R1024/Q672L1003 T872R1040/Q672L1029 (P-8-11221) T872R1131/Q672L1144

G

X2 X1 X2 X1 X2

AA

O/B

A

O/B

K

F

G Field-installed X2 to X jumper (provided). H Use Aux terminal for Auxiliary heat and configure W2 cycle rate to NC. I If separate transformers are used, replace with one 75 VA transformer, as

shown on page 78.

J LED is energized when terminal is powered. K L terminal is powered continuously when thermostat is in Em. Ht. position.

T874C1448/Q674L12165 (24F5101/24F5901) T874R1020/Q674L1025 (24F5401/24F6101) T874R1178/Q674L1165 (24F5601/24F5901)

K

J

–– –

BB or

OO or

K

X1 X2

O/B O/B

A

O/B O/B

J

A

J

–

M13163

70-6627 • 77

IMPORTANT:

DISCONNECT POWER SUPPLY BEFORE BEGINNING WIRING.

STEP

4

ATTACH BOTH WIRES (FORMER VR AND V) TO REPLACEMENT THERMOSTAT R TERMINAL

TIE FORMER OUTSIDE

STEP

TRANSFORMER COMMON TO NEW TRANSORMER

3

COMMON

3

YELLOW

SERVICE LIGHT THERMOSTAT

THERMISTOR

REMOVE FORMER

STEP

OUTSIDE

1

TRANSFORMER

TAPE OFF

XXX

INDOOR BLOWER RELAY

COMPRESSOR CONTACTOR

DEFROST RELAY

REVERSING VALVE

EMERGENCY HEAT RELAY

HEAT RELAY NO. 1

OUTDOOR THERMOSTAT

DEFROST CONTROL RELAY

DEFROST RELAY

TAPE OFF

1

FORMER

V

F

M

R

E

X

Y

L

A

VR R

REPLACEMENT THERMOSTAT/

SUBBASE

G

Y

(Y1 + W1)

O

E

X

W2

L

(X1)

X2

70-6627 • 78

HEAT RELAY NO. 2

1

RELAY REQUIRED TO OPERATE SYSTEM MONITOR LIGHT ON TRADELINE THERMOSTATS. TAPE OFF IF NOT DESIRED.

HEAT RELAY NO. 1 (AUX)

EMERGENCY HEAT RELAY

REPLACE FORMER INDOOR

STEP

TRANSFORMER WITH NEW 75VA

2

AT88A1021 OR AT175A1008

M958B

LENNOX

HP11

IMPORTANT: Replace separate indoor/outdoor transformers with single 75 VA transformer. See diagram on page 78.

Electronic Replacement or Upgrade

Electromechanical

Chronotherm® III

Chronotherm IV

Function

Common

Power Indoor

Common Outside

Compressor Stage 1

Compressor Stage 2

Auxiliary Heat

D

Fan

C/O V alve

Cool

Existing

Terminals

A

T874D1165/

Q674F1022

T8611M7008

T8511M1002

T8611M2017

T8611M2025

PC8900/

W8900B1002

X X1 C C C C

G

VR

RRRRR

X– ––––

G

V

M Y1 Y Y1 Y1

G

E

G

Y1/W1

M2 Y2 Y2 Y2 Y2 Y2

W2

Y

W2 W3 W3 W3 Aux.

C

––

C

W2

C

FG GGGG

RO O

H

O/B O/B O/B

H

C/O V alve

–B B

Heat

System Monitor/

LX2 L L L L

B

System Defrost

Em. Heat

Thermistor

1st Stage Heat

LED Indication

A IMPORTANT: When subbase system is in AUTO position, equipment will

operate in COOL mode only (Q674F1022).

B For emergency heat indication, jumper E and X2. For auxiliary heat

indication, jumper W2 and X2. For any X2 functions, X1 must be connected to transformer common.

C For proper operation of auxiliary heat connect Y to W3 or AUX terminal. D Terminal must be connected to the transformer common. E W1 to Y1 jumper required.

T872G1323/Q672L1201 T874D1033 T874D1199 T874D1207/Q674L1199 T874D1207/Q674L1389

EE EEEE

A– ––––

–W1 – – – –

– – X1 X2

TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER

H

O/B O/B O/B

J

F

F Optional LED indication activated with completed circuit on X1 and

X2 terminals.

G Replace separate indoor and outdoor transformers with one 75 VA

transformer. See page 78 for wiring diagram.

H Configure O/B (select models) in Installer Setup. I LED is energized when terminal is powered. J L terminal is powered continuously when thermostat is in Em. Ht. position.

I

–

H

J

X1 X2

F

H

I

–

M13156

70-6627 • 79

LENNOX

HP16, HP19, HP21, HP22 (DIRECT REPLACEMENTS)

Function

Common

Compressor

System Monitor/

Sytem Defrost

Outdoor Stat/

A

Power

1st Stage

Heat

Auxiliary

Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

G

Em. Heat

Chronotherm

Electromechanical

Existing

Terminals

T841A1555

Y594R1763

Y594G1161

XBBB C CCCCC

F

V

RR R R R R R R R R

V

MYYY

– – – – W1 W1 W1 W1 W1

YWWW

FGGG G GGGGG

––––

R O O O O O O or

G

LFFF L LLLLL

J

EX2X2X2 E EEEEE

T8611R1000

Y1

®

III

T8411R1002

T8611G1004

or

Y Y Y1 Y Y1

C

T8411R1028

C

T8511G1021

T8511G1047

T8011R1006

C

Chronotherm

T8011R1014

T8611G2002

C

IV

PC8900/

T8611G2028

C

W8900B1002

Y1/W1

–

W2 W2 W2 W2 W2 Aux.

HH

B B B or

E

O/B

J

BB or

H

OO or

E

O/B O/B

H

O/B O/B

J

H

J

Electronic Replacement or Upgrade

Outdoor

ATTT

Sensor

LED Indication

A Terminal B (C or X) must be connected to transformer common. B Tape off. Thermostat replaces outdoor reset with improved zero droop

performance.

C Do not remove factory-installed jumper. D Optional LED indication activated with completed circuit on X1 and X2

terminals.

E L terminal is powered continuously when thermostat is in Em. Ht. position.

T874C1448/Q674L1355 (24F5101/31F3201) T874C1448/Q674L1165 (24F5101/24F5901) T874R1178/Q674L1355 (24F5601/31F3201) T874R1178/Q674L1165 (24F5601/24F5901)

––––

TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER (CUSTOMER PART NUMBER)

70-6627 • 80

B

D

X1 X2

F If separate transformers are used, replace with one 75 Va transformer as

shown on page 78.

G R8222B1067 Relay required to operate system monitor light (emergency

heat LED) on TRADELINE replacement thermostats. See page 11. Tape off if LED indication is not desired.

H Configure O/B (select models) in Installer Setup. I When W2 is not used, configure W2 cycle rate to NC. J LED is energized when terminal is powered.

B

–– –

B

X1 X2

B

D

–

M13164

LENNOX

HP16, HP18, HP19, HP20, HP21, HP22

Function

Common

Compressor

G

Power

1st Stage

Heat

Auxiliary

Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

Electromechanical

Chronotherm

Existing

Terminals

or

X

X2

or

V

M

or

C

I

or

VR

or

YYYY1

T841A1712

X

XXXCCCCCC

Y594R1425

RRRRRRRRRR

– – W1 W1 W1 W1 W1 W1 W1

or W or

Y

F

R

W2 W2 W2 W2 W2 W2 W2 W2 W2 Aux.

or

GGGGGGGGGG

or

–

BBBBBBB or

or

OOOOOOO or

H

Y594G1419

Y594G1476

H

T8611R1000

Y1

®

III

T8411R1002

T8611G1004

or

Y Y Y1 Y Y1

H

T8411R1028

H

T8511G1021

T8511G1047

T8011R1006

T8011R1014

H

AA

O/B

A

O/B

Electronic Replacement or Upgrade

Chronotherm

IV

T8611G2002

T8611G2028

H

BB or

OO or

PC8900/

W8900B1002

Y1/W1

H

–

O/B O/B

A

O/B O/B

J

A

System Monitor/

F

C

L L L LLLLL

L

System Defrost

F

EM. Heat

Multiple Aux.

Heat Loads

E

Thermistor

LED Indication

A Configure O/B (select models) in Installer Setup. B Optional LED indication activated with completed circuit on X1 and

X2 terminals.

C Not on HP18 or HP20. D Tape off. Not used. E Terminal is for multiple second stage loads such as contactors, sequencers,

or relays.

F R8222B1067 Relay required to operate system monitor light (emergency

heat LED) on TRADELINE replacement thermostats, see page 10. Tape off if LED indication is not desired.

TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER (CUSTOMER PART NUMBER)

E EEEEEEEEE

W3 W3 W3 W3

D

A –––––––––

or

X1

X2

T874C1448/Q674L1355(24F5101/31F3201) T874C1448/Q674L1165(24F5101/24F5901) T874G1014/Q674F1113(24F5801/24F6201) T874G1154/Q674F1105 T874R1178/Q674L1355(24F5601/31F3201) T874R1178/Q674L1165(24F5601/24F5901) T8141A1089 T8611G1053 (27H3001)

–

X2 X1 X2 X1 X2

M

K

B

G Terminal X (X2 or C) must be connected to transformer common. H Do not remove factory-installed jumper. I If separate transformers are used, replace with one 75 VA transformer as

shown on page 78.

J When W2 is not used, configure W2 cycle rate to NC. K If multiple auxiliary heat loads are used, connect to W2 (Aux W8900B)

terminal.

L LED is energized when terminal is powered. M L terminal is powered continuously in Emergency Heat Position.

M

K

–– –

L

K

M

K

L

K

B

X1 X2

L

K

–

M13165

70-6627 • 81

LUXAIRE (MONCRIEF/FRASER JOHNSTON)

Function

Common

Compressor

D

Power

1st Stage

Heat

Auxiliary

Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

Chronotherm

Electromechanical

Existing

Terminals

T841A1712

Y594R1425

B or X X X X C C C C C C

RRRR R RR R RR

B

YYYY1

– – W1 W1 W1 W1 W1 W1 W1

or

W

W2 W2 W2 W2 W2 W2 W2 W2 W2 Aux.

GGGG G GG G GG

–BBB

O O O O O O O or

E

Y594G1419

Y594G1476

E

T8611R1000

Y1

®

III

T8411R1002

T8611G1004

or

Y Y Y1 Y Y1

E

T8411R1028

E

T8511G1021

T8511G1047

B B B or

T8011R1006

T8011R1014

E

AA

O/B

A

O/B

E

BB or

OO or

Chronotherm

IV

T8611G2002

T8611G2028

E

O/B O/B

A

O/B O/B

PC8900/

W8900B1002

Y1/W1

–

J

A

Electronic Replacement or Upgrade

System Monitor/

––L– L LLL LL

System Defrost

EM. Heat

Multiple Aux.

Heat Loads

LED Indication

2nd Stage

X or E E E E E E E E E E

C

–

W3 W3 W3

–

X2

F

X1

X2

I

–––– – –– – –W2

Compressor

A Configure O/B (select models) in Installer Setup. B Both first stage heat and cool are connected to Y terminal. C Terminal is for multiple second stage loads such as contactors, sequencers,

or relays.

D Terminal X (C or B) must be connected to transformer common. E Do not remove factory-installed jumper. F Field-installed X2 to X jumper (provided).

G

X1

H

X2

G If multiple auxiliary heat loads are used, connect to W2 (Aux W8900B)

terminal.

H Optional CHECK LED. Connect X1 to switching device; jumper X2 to C. I Optional LED indication activated with completed circuit on X1 and

X2 terminals.

J When W2 is not used, configure W2 cycle rate to NC.

G

–– –

G

X1 X2

G

I

G

–

J

M13166

70-6627 • 82

MAGIC CHEF

“PB” SERIES EQUIPMENT

Function

Common

Power

1st Stage

Cool

1st Stage

Heat

2nd Stage

Heat

Fan

C/O V alve

Heat

Chronotherm

Electromechanical

Existing

Terminals

B

CXCCCCCC

R

Y1 Y1 Y1

W1 W1 W1 W1 W1 W1 W1 W1

W2 W2 W2 W2 W2 W2 W2 W2 W2

GGGGGGGGG

–BB

NOT

AVAILABLE

NOT AV AILABLE

A

T874C1018/

Q674B1034

Rc

C

Y594G1419

Y594G1476

RRRRRRR

®

III

T8611R1000

Y1

CC

B B B or

T8411R1002

T8411R1028

YY1 Y Y1

C

T8511G1021

T8511G1047

C

O/B

Chronotherm

T8011R1006

T8011R1014

C

BB or

T8611G2002

Electronic Replacement or Upgrade

IV

PC8900/

T8611G2028

C

O/B O/B

W8900B1002

F

Y1/W1

–

C/O V alve

OOOOOO or

Cool

System Monitor/

X1 X1 L L L L L L

E

System Defrost

EM. Heat

2nd Stage

E–EEEEEEE

–

Y2 – – – – – – Y2

Cool

Power Heat

A IMPORTANT: No provision for emergency heat, system monitor (compressor

fault), or auxiliary heat LEDs.

B Terminal C (X) must be connected to transformer common. C Remove Y1 (Y) to W1 (W) jumper.

–Rh–

O/B

4

E

––––

D L terminal is powered continuously when thermostat is in Em. Ht. position. E LED is energized when terminal is powered. F If separate Y1 and W1 terminals required, install R8222D1014; see

page 12.

OO or

4

O/B O/B

E

–

M13167

E

–

70-6627 • 83

MAGIC CHEF

“PE” SERIES EQUIPMENT

Function

Common

Compressor

F

Power

1st Stage

Heat

Aux. Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

Electronic Replacement or Upgrade

Chronotherm

IV

T8511G1021

T8511G1047

T8011R1006

T8011R1014

T8611G2002

T8611G2028

PC8900/

W8900B1002

Existing

Terminals

Electromechanical

T841A1712

Y594R1425

Y594G1419

Y594G1476

Chronotherm

III

T8611R1000

T8611G1004

®

T8411R1002

T8411R1028

CXXX C CCCCC

RRRR R RRRRR

B

YYYY1

–

W

–

W1 W1 W1 W1 W1 W1 W1 –

W2 W2 W2 W2 W2 W2 W2 W2 Aux.

Y1

or

GGG

Y

YY1 Y Y1

G

Y1/W1

L

GGGG G GGGGG

–BBB

B B B or

O O O O O O O or

O/B

BB or

OO or

AA

O/B O/B

AA

O/B O/B

A

System Monitor/

System Defrost

4

EM. Heat

Multiple Aux.

Heat Loads

LED

Indication

C

E

X1 L L L L L L L

EEEE E EEEEE

–

W3 W3 W3

–

I

X2 X1 X2 X1 X2

K

2nd Stage

Compressor

A Configure O/B (select models) in Installer Setup. B Both first stage heat and cool are connected to Y terminal. C Terminal is for multiple second stage loads such as contactors, sequencers,

or relays.

D If provided on original equipment. E Relay (typically R8222B1067) required if outdoor section has reset shunt

relay and malfunction light indication is desired on thermostat. See page 11.

F Terminal C (X) must be connected to transformer common. G Do not remove factory-installed jumper.

–––– – ––––W2

N

J

H

H Optional CHECK LED on T8611G1004. Connect X1 to X1 on control

terminal; jumper X2 to R.

I Field-installed X2 to X jumper (provided). J If multiple auxiliary heat loads are used, connect to W2 (Aux W8900B)

terminal.

K Optional LED indication activated with completed circuit on X1 and

X2 terminals.

L When W2 is not used, configure W2 cycle rate to NC. M LED is energized when terminal is powered. N L terminal is powered continuously in Emergency Heat Position.

N

J

–– –

M

J

N

J

M

J

K

X1 X2

M

J

–

L

M13168

70-6627 • 84

MAMMOTH

Function

Common

Power Reset

F

Power

1st Stage

Comp.

2nd Stage

Comp.

1st Stage

Heat

Aux. Heat

Chronotherm

Electromechanical

Existing

Terminals

T841A1712

Y594R1425

C or X X X X C C C C C C

R or R1 R R R R R R R R R

R2 – – – – – – – – –

Y1 or YY Y Y1

B

Y2 – – – – – – – – – Y2

––

D

W1 W1 W1 W1 W1 W1 W1 –

W2 W2 W2 W2 W2 W2 W2 W2 W2 Aux.

Y594G1419

Y594G1476

GG

T8611R1000

Y1

G

®

III

T8611G1004

or

Y

Chronotherm

IV

T8411R1002

T8411R1028

YY1 Y Y1

T8511G1021

T8511G1047

GG

T8011R1006

T8011R1014

G

T8611G2002

T8611G2028

G

PC8900/

W8900B1002

Y1/W1

Electronic Replacement or Upgrade

J

Fan

C/O V alve

GGGG G GGGGG

BBBB

B B B or

O/B

BB or

Heat

C/O V alve

O O O O O O O or

O/B

OO or

Cool

D

System Monitor/

E

X or L L L L L L L L

L

M

L

M

System Defrost

E

EM. Heat

Multiple Aux.

Heat Loads

LED

Indication

Filter

C

–EEE E EEEEE

–

W3 W3 W3 – – – – – –

–

I

X2 X1 X2 X1 X2

K

H

–– –

X1 X2

F––– – –––––

2nd Stage

Compressor

A Configure O/B (select models) in Installer Setup. B Both first stage heat and cool are connected to Y terminal. C Terminal is for multiple auxiliary heat loads such as contactors, sequencers,

or relays.

D If provided on original equipment. E Relay (typically R8222B1067) required if outdoor section has reset shunt

relay and malfunction light indication is desired on thermostat. See page 11.

F Terminal X (C) must be connected to transformer common.

T834C2135 T841B1042 T874G1659/Q674C1330 T874H1096/Q674C1330 T874Y1005/Q674E1353

–––– – ––––

G Do not remove factory-installed jumper. H Optional CHECK LED on T8611G1004. See Fig. 26. I Field-installed X2 to X jumper (provided). J When W2 is not used, configure W2 cycle rate to NC. K Optional LED indication activated with completed circuit on X1 and

X2 terminals.

L LED is energized when terminal is powered. M L terminal is powered continuously in Emergency Heat Position.

TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER

AA

O/B O/B

AA

O/B O/B

L

K

–

W2

M13169

A

L

J

70-6627 • 85

MAMMOTH

USED WITH A STANDARD HEAT PUMP THERMOSTAT

Function

Common

Compressor

D

Power

1st Stage

Heat

Aux. Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

Chronotherm

Electromechanical

Existing

Terminals

T841A1712

Y594R1425

CXXX C CCCCC

RRRR R RRRRR

H

Y Y Y Y1 Y1 or Y Y Y1 Y Y1

––

C

W2 W2 W2 W2 W2 W2 W2 W2 W2 Aux.

W1 W1 W1 W1 W1 W1 W1 –

GGGG G GGGGG

B B B B B B B or

O O O O O O O or

E

Y594G1419

Y594G1476

E

T8611R1000

®

III

T8611G1004

E

T8411R1002

T8411R1028

T8511G1021

T8511G1047

EE

1

O/B

1

O/B

Chronotherm

T8011R1006

T8011R1014

E

BB or

OO or

IV

T8611G2002

T8611G2028

E

1

O/B O/B

1

O/B O/B

PC8900/

W8900B1002

Y1/W1

J

1

Electronic Replacement or Upgrade

System Monitor/

LL LLLLLL

L

System Defrost

Em. Heat

–

EEE

Multiple Aux.

Heat Loads B

LED

Indication

2nd Stage

–

––

W3 W3 W3

G

X2 X1 X2 X1 X2

K

–––– – ––––

Compressor

2nd Stage

–––– – ––––

Cool

A Configure O/B (select models) in Installer Setup. B Terminal is for multiple auxiliary heat loads such as contactors, sequencers,

or relays.

C If provided on original equipment. D Terminal must be connected to the transformer common. E Do not remove factory-installed jumper. F Optional CHECK LED on T8611G1004. Connect L to X1; jumper X2 to C. G Field-installed X2 to X jumper.

M

MM

L

EEEEEE

I

F

I

–– –

I

K

X1 X2

I

–

W2

J

Y2

H Both first stage heat and cool are connected to Y terminal. I If multiple auxiliary heat loads are used, connect to W2 (Aux W8900B)

terminal.

J When W2 is not used, configure W2 cycle rate to NC. K Optional LED indication activated with completed circuit on X1 and

X2 terminals.

L LED is energized when terminal is powered. M L terminal is powered continuously when thermostat is in Em. Ht. position.

M13194

70-6627 • 86

TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER (CUSTOMER PART NUMBER)

T834C2135 (71116901) T841B1042 (71117001)

MAMMOTH

USED WITH A NIGHT SETBACK THERMOSTAT

Function

Common

Night Setback

Compressor

F

Power

1st Stage

Heat

Aux. Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

Chronotherm

Electromechanical

Existing

Terminals

J

CXXX C CCCCC

D

R1 R R R R R R R R R

T841A1712

Y594R1425

R2 – – – – – – – – –

Y Y Y Y1 Y1 or Y Y Y1 Y Y1

G

––

–

W2 W2 W2 W2 W2 W2 W2 W2 Aux.

W1 W1 W1 W1 W1 W1 W1 –

GGGG G GGGGG

B B B B B B B or

O O O O O O O or

Y594G1419

Y594G1476

G

T8611R1000

®

III

T8611G1004

G

T8411R1002

T8411R1028

T8511G1021

T8511G1047

GG

1

O/B

1

O/B

Chronotherm

T8011R1006

T8011R1014

G

BB or

OO or

IV

T8611G2002

T8611G2028

G

1

O/B O/B

1

O/B O/B

PC8900/

W8900B1002

Y1/W1

B

1

Electronic Replacement or Upgrade

System Monitor/

XL LLLLLL

L

System Defrost

Em. Heat

–

EEE

Multiple Aux.

Heat Loads C

LED

Indication

2nd Stage

–

––

W3 W3 W3

I

X2 X1 X2 X1 X2

E

–––– – ––––

Compressor

2nd Stage

–––– – ––––

Cool

A Configure O/B (select models) in Installer Setup. B When W2 is not used, configure W2 cycle rate to NC. C Terminal is for multiple auxiliary heat loads such as contactors, sequencers,

or relays.

D Disconnect external timimg device from circuit before wiring replacement

thermostat.

E Optional LED indication activated with completed circuit on X1 and

X2 terminals.

F Terminal must be connected to the transformer common.

M

MM

L

EEEEEE

K

H

K

–– –

K

E

X1 X2

K

–

B

W2

Y2

G Do not remove factory-installed jumper. H Optional CHECK LED on T8611G1004. See Fig. 26. I Field-installed X2 to X (C) jumper. J C terminal is located on terminal strip, not on subbase. K If multiple auxiliary heat loads are used, connect to W2 (Aux W8900B)

terminal.

L LED is energized when terminal is powered. M L terminal is powered continuously when thermostat is in Em. Ht. position.

M13195

TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER (CUSTOMER PART NUMBER)

T874G1378/Q674C1124 T874G1659/Q674C1330 (71115201) T874H1096/Q674C1330 (71115201)

70-6627 • 87

MARTIN INDUSTRIES

Function

Common

Compressor

E

Power

1st Stage

Heat

Aux. Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

Chronotherm

Electromechanical

Existing

Terminals

T841A1712

Y594R1425

XXXX C CCCCC

RRRR R RRRRR

B

Y Y Y Y1 Y1 or Y Y Y1 Y Y1

––

W1 W1 W1 W1 W1 W1 W1 –

W2 W2 W2 W2 W2 W2 W2 W2 W2 Aux.

GGGG G GGGGG

B B B B B B B or

O O O O O O O or

F

Y594G1419

Y594G1476

F

T8611R1000

®

III

T8611G1004

F

T8411R1002

T8411R1028

T8511G1021

T8511G1047

FF

1

O/B

1

O/B

Chronotherm

T8011R1006

T8011R1014

F

BB or

OO or

IV

T8611G2002

T8611G2028

F

1

O/B O/B

1

O/B O/B

PC8900/

W8900B1002

Y1/W1

G

1

Electronic Replacement or Upgrade

System Monitor/

LL LLLLLL

I

System Defrost

Em. Heat

Multiple Aux.

Heat Loads

LED

Indication

2nd Stage

C

E

EEE

W3 W3 W3 W3

––X2X1

X2

D

–––– – ––––

Compressor

2nd Stage

–––– – ––––

Cool

A Configure O/B (select models) in Installer Setup. B Both first stage heat and cool are connected to Y terminal. C Terminal is for multiple auxiliary heat loads such as contactors, sequencers,

or relays.

D LED indication with completed circuit on X1 and X2 terminals. E Terminal must be connected to the transformer common.

J

JJ

I

EEEEEE

H

X1

X2

H

D

–– –

H

X1 X2

D

H

–

W2

G

Y2

F Do not remove factory-installed jumper. G When W2 is not used, configure W2 cycle rate to NC. H If multiple auxiliary heat loads are used, connect to W2 (Aux W8900B)

terminal.

I LED is energized when terminal is powered. J L terminal is powered continuously when thermostat is in Em. Ht. position.

M13196

T841A1183 T841A1522 T841A1548 (24015808)

70-6627 • 88

TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER (CUSTOMER PART NUMBER)

PHILLIPS ENERGY

Function

Common

Compressor

D

Power

1st Stage

Heat

Aux. Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

Chronotherm

Electromechanical

Existing

Terminals

T841A1712

Y594R1425

CXXX C CCCCC

RRRR R RRRRR

H

Y1 Y Y Y1 Y1 or Y Y Y1 Y Y1

F

W1

–

W1 W1 W1 W1 W1 W1 W1 –

W2 W2 W2 W2 W2 W2 W2 W2 W2 Aux.

GGGG G GGGGG

B B B B B B B or

O O O O O O O or

F

Y594G1419

Y594G1476

F

T8611R1000

®

III

T8611G1004

F

T8411R1002

T8411R1028

T8511G1021

T8511G1047

FF

1

O/B

1

O/B

Chronotherm

T8011R1006

T8011R1014

F

BB or

OO or

IV

T8611G2002

T8611G2028

F

1

O/B O/B

1

O/B O/B

PC8900/

W8900B1002

Y1/W1

B

1

Electronic Replacement or Upgrade

System Monitor/

LL LLLLLL

H

System Defrost

Em. Heat

E

EEE

Multiple Aux.

Heat Loads C

LED

Indication

2nd Stage

–

X2

W3 W3 W3

–

X2 X1 X2 X1 X2

JJG

–––– – ––––

Compressor

2nd Stage

–––– – ––––

Cool

A Configure O/B (select models) in Installer Setup. B When W2 is not used, configure W2 cycle rate to NC. C Terminal is for multiple auxiliary heat loads such as contactors, sequencers,

or relays.

D Terminal must be connected to the transformer common. E If multiple auxiliary heat loads are used, connect to W2 (Aux W8900B)

terminal.

I

HHHII

EEEEEE

E

–– –

E

X1 X2

J

E

–

W2

B

Y2

F Do not remove factory-installed jumper. G Field-installed X2 to X jumper. H LED is energized when terminal is powered. I L terminal is powered continuously when thermostat is in Em. Ht. position. J Optional LED indication activated with completed circuit on X1 and

X2 terminals.

M13197

TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER

T8611R1174

70-6627 • 89

RHEEM/RUUD

COOLING CHANGEOVER (PRE 11/85) (PCA, PNA, PNB TYPICAL)

Function

Common

Compressor

D

Power

1st Stage

Heat

Aux. Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

Electronic Replacement or Upgrade

Chronotherm

IV

T8511G1021

T8511G1047

T8011R1006

T8011R1014

T8611G2002

T8611G2028

PC8900/

W8900B1002

Existing

Terminals

Electromechanical

T841A1712

Y594R1425

Y594G1419

Y594G1476

Chronotherm

III

T8611R1000

T8611G1004

®

T8411R1002

T8411R1028

XXXX C CCCCC

RRRR R RRRRR

or

Y1

Y Y Y Y1 Y1 or Y Y Y1 Y Y1

F

W1

C

W2 W2 W2 W2 W2 W2 W2 W2 W2 Aux.

–

W1 W1 W1 W1 W1 W1 W1 –

F

FF

F

Y1/W1

F

2

GGGG G GGGGG

1

O/B O/B

1

O/B O/B

1

B B B B B B B or

O O O O O O O or

1

O/B

1

O/B

BB or

OO or

System

LL LLLLLL

I

Monitor

Em. Heat

E

EEE

Multiple Aux.

Heat Loads

LED

Indication

C

2nd Stage

W3 W3 W3 W3

––

X2 X1 X2 X1 X2

–––– – ––––

Compressor

2nd Stage

–––– – ––––

Cool

A Configure O/B (select models) in Installer Setup. B When W2 is not used, configure W2 cycle rate to NC. C Terminal is for multiple auxiliary heat loads such as contactors, sequencers,

or relays.

D Terminal must be connected to the transformer common. E If multiple auxiliary heat loads are used, connect to W2 (Aux W8900B)

terminal.

J

IIIJJ

EEEEEE

E

GGH

E

–– –

E

X1 X2

G

E

–

W2

2

Y2

F Do not remove factory-installed jumper. G Optional LED indication with completed circuit on X1 and X2 terminals. H Field-installed X2 to X (C) jumper. I LED is energized when terminal is powered. J L terminal is powered continuously when thermostat is in Em. Ht. position.

M13198

70-6627 • 90

RHEEM/RUUD

PCB, PFA, PGB, PGA HEATING CHANGEOVER (AFTER 11/85) RPCB, RPFA

Function

Common

Compressor

D

Power

1st Stage

Heat

Aux. Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

Chronotherm

Electromechanical

Existing

Terminals

T841A1308

Y594R1425

XXXX C CCCCC

RRRR R RRRRR

Y Y Y1 Y1 Y1 or Y Y Y1 Y Y1

– – W1 W1 W1 W1 W1 W1 W1 –

W2 W2 W2 W2 W2 W2 W2 W2 W2 Aux.

GGGG G GGGGG

B B B B B B B or

O O O – O O O or

E

Y594G1419

Y594G1476

E

J

T8611R1000

®

III

T8611G1004

E

J

T8411R1002

T8411R1028

T8511G1021

T8511G1047

EE

A

O/B

A

O/B

Chronotherm

T8011R1006

T8011R1014

E

BB or

OO or

IV

T8611G2002

T8611G2028

E

A

O/B O/B

A

O/B O/B

PC8900/

W8900B1002

Y1/W1

B

A

Electronic Replacement or Upgrade

System

L

II

LX1 L LL L L L

I

Monitor

Em. Heat

Multiple Aux.

EE

–W3W3

H

EE

Heat Loads C

LED

Indication

2nd Stage

––

X2 X2 X1 X2

–––– – ––––

Compressor

2nd Stage

–––

–

Cool

A Configure O/B (select models) in Installer Setup. B When W2 is not used, configure W2 cycle rate to NC. C Terminal is for multiple auxiliary heat loads such as contactors, sequencers,

or relays.

D Terminal must be connected to the transformer common. E Do not remove factory-installed jumper.

J

IJIJI

EEEEEE

H

FGG

H

–– –

HH

X1 X2

–––––

F Optional Check LED on T8611G1004. See Fig. 26. G Field-installed X2 to X (C) jumper. H If multiple auxiliary heat loads are used, connect to W2 (Aux W8900B)

terminal.

I LED is energized when terminal is powered. J L terminal is powered continuously when thermostat is in Em. Ht. position.

H

–

B

W2

Y2

M13206

70-6627 • 91

SECO

TA2000, TA2040, TA2010 TA2050

Function

Common

Compressor

D

Power

1st Stage

Heat

Aux. Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

Chronotherm

Electromechanical

Existing

Terminals

T841A1712

Y594R1425

XXXX C CCCCC

RRRR R RRRRR

Y Y Y Y1 Y1 or Y Y Y1 Y Y1

––

W2

WWW

W1 W1 W1 W1 W1 W1 W1 –

GGGG G GGGGG

B B B B B B B or

O O O O O O O or

F

Y594G1419

Y594G1476

F

T8611R1000

®

III

T8611G1004

T8411R1002

T8411R1028

T8511G1021

T8511G1047

T8011R1006

Chronotherm

T8011R1014

IV

T8611G2002

T8611G2028

PC8900/

W8900B1002

Y1/W1

F

FF

F

W2 W2 W2 W2 W2 Aux.

O/B

A

O/B

BB or

OO or

O/B O/B

A

O/B O/B

B

AAA

A

Electronic Replacement or Upgrade

System Monitor/

J

LL LLLLLL

I

System Defrost

Em. Heat

Multiple Aux.

Heat Lads

LED

Indication

2nd Stage

J

EEEE E EEEEE

F

W3 W3 W3 W3

C

––

–––– – ––––W2

H

X2 X1 X2 X1 X2

FF

G

Compressor

2nd Stage

–––– – ––––

Cool

A Configure O/B (select models) in Installer Setup. B When W2 is not used, configure W2 cycle rate to NC. C Terminal is for multiple auxiliary heat loads such as contactors, sequencers,

or relays.

D Terminal must be connected to the transformer common. E If multiple auxiliary heat loads are used, connect to W2 (Aux W8900B)

terminal.

K

G

–– –

X1 X2

G

IIIKK

EEEEEE

–

B

Y2

F Do not remove factory-installed jumper. G Optional LED indication with completed circuit on X1 and X2 terminals. H Field-installed X2 to X (C) jumper. I LED is energized when terminal is powered. J E and L terminals are not available on TA2010 or TA2050. K L terminal is powered continuously when thermostat is in Em. Ht. position.

M13171

70-6627 • 92

SECO

TA2060

Function

Common

Compressor

A

Power

1st Stage

Heat

Aux. Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

Electronic Replacement or Upgrade

Chronotherm

IV

T8511G1021

T8511G1047

T8011R1006

T8011R1014

T8611G2002

T8611G2028

PC8900/

W8900B1002

Existing

Terminals

Electromechanical

T841A1555

Y594R1763

Chronotherm

Y594G1161

®

III

T8611R1000

T8611G1004

T8411R1002

T8411R1028

XBBB C CCCCC

RRRR R RRRRR

Y Y Y Y Y1 or Y Y Y1 Y Y1

––––

W2

WWW

C

W1 W1 W1 W1 W1 –

W2 W2 W2 W2 W2 Aux.

CC

C

Y1/W1

G

GGGG G GGGGG

EEE

– – – – B B B or

O O O O O O O or

O/B

E

O/B

BB or

OO or

O/B O/B

E

O/B O/B

E

System Monitor/

LFFF L LLLLL

HH

H

System Defrost

Outdoor

W3

F

TTT

FF

Thermistor/

Sensor

Em. Heat

LED

Indication

2nd Stage

E

––––

X2 X2 X2

X1 X2

–––– – ––––

Compressor

2nd Stage

–––– – ––––

Cool

A Terminal must be connected to the transformer common. B Tape off. Thermostat replaces outdoor reset with improved zero droop

performance.

C Do not remove factory-installed jumper. D Optional LED indication with completed circuit on X1 and X2 terminals.

I

HHHII

BBBBBB

EEEEEE

D

–– –

X1 X2

4

–

W2

G

Y2

E Configure O/B (select models) in Installer Setup. F Replace existing thermistor with Honeywell C815A1005. G When W2 is not used, configure W2 cycle rate to NC. H LED is energized when terminal is powered. I L terminal is powered continuously when thermostat is in Em. Ht. position.

M13199

70-6627 • 93

SUN MANUFACTURING

Function

Common

Compressor

C

Power

1st Stage

Heat

Aux. Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

Electronic Replacement or Upgrade

Chronotherm

IV

T8511G1021

T8511G1047

T8011R1006

T8011R1014

T8611G2002

T8611G2028

PC8900/

W8900B1002

Existing

Terminals

Electromechanical

T841A1712

Y594R1425

Y594G1419

Y594G1476

Chronotherm

III

T8611R1000

T8611G1004

®

T8411R1002

T8411R1028

XXXX C CCCCC

RRRR R RRRRR

Y Y Y Y1 Y1 or Y Y Y1 Y Y1

E

EE

E

––

W1 W1 W1 W1 W1 W1 W1 –

E

Y1/W1

B

W1 W2 W2 W2 W2 W2 W2 W2 W2 Aux.

GGGG G GGGGG

A

O/B O/B

A

O/B O/B

A

B B B B B B B or

O O O O O O O or

A

O/B

A

O/B

BB or

OO or

System Monitor/

LLX1LLLLLL

I

System Defrost

Em. Heat

Multiple Aux.

Heat Loads

LED

Indication

2nd Stage

E

W3 W3 W3 W3

D

––

–––– – ––––

EEE

F

G

X2 X2 X1 X2

F

G

Compressor

2nd Stage

–––– – ––––

Cool

A Configure O/B (select models) in Installer Setup. B When W2 is not used, configure W2 cycle rate to NC. C Terminal must be connected to the transformer common. D Terminal is for multiple auxiliary heat loads such as contactors, sequencers,

or relays.

E Do not remove factory-installed jumper.

J

JJ

I

EEEEEE

H

F

H

–– –

H

X1 X2

H

–

W2

B

Y2

F Optional LED indication with completed circuit on X1 and X2 terminals. G Field-installed X2 to X (C) jumper. H If multiple auxiliary heat loads are used, connect to W2 (Aux W8900B)

terminal.

I LED is energized when terminal is powered. J L terminal is powered continuously when thermostat is in Em. Ht. position.

M13200

70-6627 • 94

TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER (CUSTOMER PART NUMBER)

T841A1399 (HPL1404)

SQUARE D/SUN DIAL

Function

Common

Compressor

System Monitor/

System Defrost

D

Power

1st Stage

Heat

Aux. Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

Chronotherm

Electromechanical

Existing

Terminals

T841A1712

Y594R1425

C or X X X X C C C C C C

RRRR R RRRRR

Y Y Y Y1 Y1 or Y Y Y1 Y Y1

––

W1 W1 W1 W1 W1 W1 W1 –

W2 W2 W2 W2 W2 W2 W2 W2 W2 Aux.

GGGG G GGGGG

B B B B B B B or

O O O O O O O or

LL LLLLLL

Y594G1419

Y594G1476

F

8GG8G88

F

T8611R1000/

®

III

T8611G1004

F

T8411R1002

T8411R1028

T8511G1021

T8511G1047

FF

A

O/B

A

O/B

Chronotherm

T8011R1006

T8011R1014

F

BB or

OO or

IV

T8611G2002

T8611G2028

F

A

O/B O/B

A

O/B O/B

PC8900/

W8900B1002

Y1/W1

B

A

Electronic Replacement or Upgrade

Em. Heat

Multiple Aux.

Heat Loads

LED

Indication

2nd Stage

C

K

or

E

EEE

W3 W3 W3 W3

––X2X1

X2

–––– – ––––

Compressor

2nd Stage

–––– – ––––

Cool

A Configure O/B (select models) in Installer Setup. B When W2 is not used, configure W2 cycle rate to NC. C Terminal is for multiple auxiliary heat loads such as contactors, sequencers,

or relays.

D Terminal must be connected to the transformer common.

TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER (CUSTOMER PART NUMBER)

T841A1357

T841A1365 (121000012)

EEEEEE

E

X1

X2

E

–– –

E

X1 X2

E

–

W2

B

Y2

E If multiple auxiliary heat loads are used, connect to W2 (Aux W8900B)

terminal.

F Do not remove factory-installed jumper. G L terminal is powered continuously when thermostat is in Em. Ht. position. 8 LED is energized when terminal is powered.

M13201

70-6627 • 95

SQUARE D/SUN DIAL

Function

Common

Compressor

B

Power

1st Stage

Heat

Aux. Heat

Fan

C/O V alve

Heat

Electronic Replacement or Upgrade

III

A

®

T8411R1002

T8411R1028

T8511G1021

T8511G1047

T8011R1006

AA

O/B

Chronotherm

T8011R1014

A

BB or

IV

T8611G2002

T8611G2028

A

O/B O/B

PC8900/

W8900B1002

C

Y1/W1

E

Chronotherm

Electromechanical

Existing

Terminals

NOT

AVAILABLE

X or X1 or C X1 C C C C C C

RRRRRRRR

Y or Y1 Y1 Y1 or Y Y Y1 Y Y1

W1 W1 W1 W1 W1 W1 W1 –

W2 W2 W2 W2 W2 W2 W2 Aux.

GGGGGGGG

B B B B B or

NOT AVAILABLE

T874C1018/

NOT AVAILABLE

Q674F1022

A

T8611R1000

C/O V alve

O O O O O or

Cool

System Monitor/

L

X2

F

System Defrost

Em. Heat

LED

Indication

2nd Stage

or

K

E

X2 X2 X1 X2

–––––––

Compressor

2nd Stage

Y2 Y2 Y2

Cool

A Remove factory-installed Y1 (Y) to W1 jumper. B Terminal must be connected to the transformer common. C If separate Y1 and W1 terminals are required, install R8222D1014; see page 12. D Optional LED indication activated with completed circuit on X1 and

X2 terminals.

O/B

G

LLLLLL

GF

F

OO or

G

O/B O/B

F

EEEEEE

D

–

E

W2

E When W2 is not used, configure W2 cycle rate to NC. F LED is energized when terminal is powered. G L terminal is powered continuously when thermostat is in Em. Ht. position.

M13202

70-6627 • 96

TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER (CUSTOMER PART NUMBER)

T872C1525/Q672F1182 (HCD-2/HCB-1)

T874C1224/Q674F1071 (63600-002-09/63600-002-11)

TRANE/AMERICAN STANDARD

DIRECT TRADE REPLACEMENTS

Function

Common

Compressor

A

Power

1st Stage

Heat

Aux. Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

Chronotherm

Electromechanical

Existing

Terminals

T841A1555

Y594R1763

Y594G1161

BBBB C CCC CC

RRRR R RRR RR

Y Y Y Y Y1 or Y Y Y1 Y Y1

––––

W or

W1

WWW

GGGG G GGG GG

–

––– B BB or

O O O O O O O or

T8611R1000

W1 W1 W1 W1 W1 –

®

III

T8611G1004

T8411R1002

T8411R1028

T8511G1021

T8511G1047

T8011R1006

T8011R1014

Chronotherm

IV

T8611G2002

T8611G2028

PC8900/

W8900B1002

Y1/W1

C

W2 W2 W2 W2 W2 Aux.

E

O/B O/B

E

O/B O/B

O/B

E

O/B

E

BB or

OO or

Electronic Replacement or Upgrade

F

E

System Monitor/

F F F F L L L L L L

G

System Defrost

Outdoor

T

or

A

T

TT

Sensor C

Outdoor Stat

LED

Indication

2nd Stage

X2 X2 X2 X2

––––

–––– – ––– –

Compressor

2nd Stage

–––– – ––– –

Cool

A Terminal must be connected to the transformer common. B Tape off. Thermostat replaces outdoor reset with improved zero droop

performance.

C Do not remove factory-installed jumper. D Optional LED indication with completed circuit on X1 and X2 terminals.

TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER (CUSTOMER PART NUMBER)

T841A1407 (ASYSTAT652) T841A1530 (ASYSTAT652A) T872G1059/Q672J1039 T872R1057/Q672L1037 T874G1204/Q674J1043 T874G1675/Q674J1142 (ASYSTAT650/WY28X0250) T874R1053/Q674L1140 T874R1426/Q674L1496 (BAYSTAT339/WY28X0112) T874R1657/Q674L1611 (ASYSTAT651/WY28X235)

H

B

H

B

G

B

H

B

G

B

G

B

EEEEEE

X1 X2

D

–– –

X1 X2

D

–

W2

F

Y2

E Configure O/B (select models) in Installer Setup. F When W2 is not used, configure W2 cycle rate to NC. G LED is energized when terminal is powered. H L terminal is powered continuously when thermostat is in Em. Ht. position.

M13225

T874R1939 (ASYSTAT-651A)/Q674L1801 (THT1225) T8141A1014 T8141A1071 T8300A1128/Q6300A1101 (BAY28X194/BAY28X195) T8611G1038 (THT-0603) T8611G1111 (TAYSTAT501) T8611R1091 T8611R1109 (THT-0602) T8611R1117 (ASYSTAT700)

70-6627 • 97

TRANE/AMERICAN STANDARD

Function

Common

Compressor

A

Power

1st Stage

Heat

Aux. Heat

Fan

C/O V alve

Heat

C/O V alve

Cool

Chronotherm

Electromechanical

Existing

Terminals

T841A1555

Y594R1763

Y594G1161

CBBB C CCC CC

RRRR R RRR RR

Y or Y1 Y Y Y Y1 or Y Y Y1 Y Y1

W1

W2

–––

WWW

GGGG G GGG GG

B

––– B BB or

O O O O O O O or

T8611R1000

W1 W1 W1 W1 W1 –

®

III

T8611G1004

T8411R1002

T8411R1028

T8511G1021

T8511G1047

T8011R1006

Chronotherm

T8011R1014

IV

T8611G2002

T8611G2028

PC8900/

W8900B1002

Y1/W1

C

W2 W2 W2 W2 W2 Aux.

E

O/B O/B

E

O/B O/B

O/B

E

O/B

E

BB or

OO or

Electronic Replacement or Upgrade

F

E

System Monitor/

L F F F L L L L L L

G

System Defrost

Outdoor Stat

LED

Indication

2nd Stage

E

or

X1

X2

–––– – ––– –

X2 X2 X2

–––

Compressor

2nd Stage

–––– – ––– –

Cool

A Terminal must be connected to the transformer common. B Optional LED indication activated with completed circuit on X1 and

X2 terminals.

C Do not remove factory-installed jumper. D Optional LED on T8611G1004. See Fig. 26.

G

H

G

H

G

EEEEEE

B

X1 X2

–

W2

F

X1 X2

D

–– –

Y2

E Configure O/B (select models) in Installer Setup. F When W2 is not used, configure W2 cycle rate to NC. G LED is energized when terminal is powered. H L terminal is powered continuously when thermostat is in Em. Ht. position.

M13226

70-6627 • 98