Honeywell CT70A User Manual download pdf

CT70A

Heat Pump Thermostat

Your Honeywell Thermostat

Your new Honeywell CT70A Heat Pump Thermostat

provides low voltage (24 Vac) control of two-stage heating

and one-stage cooling in heat pump systems, using

manual changeover. Light-emitting diodes (LEDs) provide

emergency heat and auxiliary heat indication.

Recycling Notice

This control contains mercury in a sealed tube. Do not

place control in the trash at the end of its useful life.

Installation Instructions

Thermometer Scale Range: 45

F to 85

F [7

C to 29

C].

Electrical Ratings: 24 to 27 Vac.

Do-It-Yourself Models

M3375

If this control is replacing a control that contains mercury in

a sealed tube, do not place your old control in the trash.

Contact your local waste management authority for

instructions regarding recycling and the proper disposal of

this control, or of an old control containing mercury in a

sealed tube.

If you have questions, call Honeywell Inc. at

1-800-468-1502.

1 PREPARATION

Your Honeywell thermostat should be properly

installed if you follow these instructions step-by-step.

It is recommended that as you read, understand and

complete each step, you check ✔ it off with pencil or pen.

Check thermostat suitability for your home’s system

by reviewing the ratings listed on the front of these

instructions and reviewing the CT70 Heat Pump Thermo-

stat Wiring Guide enclosed.

Make certain that your home’s heat pump system is

working, especially if it has been inoperative for a

length of time. If the system does not work, contact your

local heating dealer for assistance.

Carefully unpack your new thermostat. Save

packages of screws, instructions, receipt and proof-

of-purchase.

2 THERMOSTAT MOUNTING DIMENSIONS

S.M. • 8-94 • Printed in U.S.A. • • ©Honeywell Inc. 1994 • Form Number 69-0846

M3375

3 [83]

AUTO ON

EM. HEAT HEAT OFF COOL

EM. HEAT AUX. HEAT

3 [101]

4 [119]

[83]

2 [52]

[5]

[33]

[10]

[13]

[9]

[10]

M7306

1 2 3 4 5 6

Summary of Contents

Page 1 - 1 PREPARATION

CT70AHeat Pump ThermostatYour Honeywell ThermostatYour new Honeywell CT70A Heat Pump Thermostatprovides low voltage (24 Vac) control of two-stage heat

Page 2 - 3 REMOVE OLD THERMOSTAT

69-0846 23 REMOVE OLD THERMOSTATWARNINGBegin by turning off power to the heat pump at themain service panel.Remove cover of old thermostat—cover norma

Page 3 - 6 SETTING THERMOSTAT

3 69-0846Push the excess wire back through the hole andplug any opening with packing material to preventdrafts that may affect thermostat performance.

Page 4 - 7 TROUBLESHOOTING

69-0846 47 TROUBLESHOOTINGYour Honeywell thermostat requires little or no attention. Most problems can generally be traced to the following:Symptom Pr

Page 5 - Limited One-Year Warranty

Limited One-Year WarrantyHoneywell warrants this product to be free from defects in the workmanship or materials, under normal use and service, fora p

Page 6

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Honeywell CT70A User Manual

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