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Installation Instructions
Thermometer Scale Range: 45
Electrical Ratings: 24 to 27 Vac.
Do-It-Yourself Models
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.
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
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.
2
THERMOSTAT MOUNTING DIMENSIONS
1
2
[52]
16
o
o
o
o
F to 85
F [7
C to 29
C].
M3375
it off with pencil or pen.
11
4
[119]
16
9
3
32
[83]
EM. HEAT HEAT OFF COOL
3
[5]
16
S.M. • 8-94 • Printed in U.S.A. •
Heat Pump Thermostat
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.
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.
31
3
[101]
32
9
3
[83]
32
80
80
70
70
60
60
50
50
AUTO
ON
EM. HEAT AUX. HEAT
• ©Honeywell Inc. 1994 • Form Number 69-0846
M3375
CT70A
1
[13]
2
3
[10]
8
11
[9]
32
3
8
[10]
9
1
32
[33]
M7306
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Table of Contents
Related Manuals for Honeywell CT70A
Summary of Contents for Honeywell CT70A
- Page 1 Electrical Ratings: 24 to 27 Vac. Do-It-Yourself Models 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.
-
Page 2: Remove Old Thermostat
Grasp the thermostat cover at the top and bottom with one hand. Pull outward on bottom edge of the cover until it snaps free of the thermostat base. Carefully remove and save the packing material surrounding the mercury switches. -
Page 3: Check Out Thermostat
Replace the thermostat cover. Check cooling only if outdoor temperature is at least switch on the thermostat to COOL and the fan switch to AUTO. Move the set point lever about 10 room temperature. Cooling and fan should start (see NOTE above). -
Page 4: Troubleshooting
TROUBLESHOOTING Your Honeywell thermostat requires little or no attention. Most problems can generally be traced to the following: Symptom Compressor doesn't Equipment has compressor provide warm air. protection time delay. System switch at OFF or COOL position. Blown fuse or tripped circuit breaker. - Page 5 Plymouth, MN 55441-4437 This warranty does not cover removal or reinstallation costs. This warranty shall not apply if it is shown by Honeywell that the defect or malfunction was caused by damage which occurred while the product was in the possession of a consumer.