Line Voltage Electric Heat Thermostats
Installation Instructions
CT62A provides single-line break.
CT62B provides double-line break.
Temperature Range: 50°F to 80°F (10°C to 25°C)
Electrical Ratings: 60 Hz noninductive
22A at 120-240 Vac; 19A at 277 Vac
Do-It-Yourself models
CT62A,B
Your Honeywell Thermostat
Your new Honeywell CT62 Electric Heating Thermostat
provides line voltage control of a radiant cable, electric
baseboard, and resistive-rated fan forced heaters within
the ratings listed above.
1 PREPARATION
Proper installation of your Honeywell thermostat will
occur if you follow these instructions STEP-BYSTEP. 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 above.
Make certain that your heating system is working,
especially if it has been inoperative for a length of
time. If the system does not work, contact your local
electrician for assistance.
THERMOSTAT MOUNTING
2 DIMENSIONS
FRONT VIEW
80
70
60
50
˚F
2-7/8 (73)
•
•
•
•
4-3/8
(111)
SIDE VIEW
1-3/4
(48)
1-1/2
(39)
3/4
(19)
1/2 (13)
1/2 (13)
2-1/8
(54)
M5795A
WARNING
This thermostat is a line voltage control (120 Volts to
240 Volts.) Do not install it if you are not completely
familiar with house wiring. If handled improperly,
there can be risk of a 120 Volt to 240 Volt electric
shock hazard, which may cause serious injury or
death.
Carefully unpack your new thermostat. To avoid
damage to the sensing element, do NOT remove
the thermostat cover until wiring has been completed.
Save packages of screws, instructions, receipt and
proof-of-purchase.
3 REMOVE OLD THERMOSTAT
WARNING
Begin by turning off power to the heating circuit at
the main service panel.
Remove cover of old thermostat—cover normally
snaps off when pulled firmly from the bottom. If it
resists, check for a screw that locks the cover.
Loosen screws holding thermostat base to outlet
box and lift away.
Disconnect wires from old thermostat. As you
disconnect each wire, tape the end and label it with
3-1/4
(83)
the letter of the terminal designation to make reconnection
to new thermostat easier.
Check the old insulation for cracks, nicks or fraying,
and apply high quality plastic tape where necessary
for adequate insulation.
Retain the old thermostat for reference purposes
and until your new thermostat is functioning
smoothly.
S.M. • Rev. 11-94 • ©Honeywell Inc. 1994 • Form Number 69-0829—1
4 WIRE AND MOUNT NEW THERMOSTAT
Turn the temperature setting knob to 65°F (18°C).
This will prevent accidental damage to the knob
stop during mounting.
Remove thermostat cover by grasping the top and
bottom ends with fingers, and pulling outward.
Connect wires to the thermostat as shown in the
applicable wiring diagram. Push the wires into the
outlet box, and insert the thermostat into the box for
mounting by pushing against top and bottom of the
thermostat base.
IMPORTANT:
IMPORTANT:
damage knob or sensing element, and change
calibration.
3
Do not press on setting knob.
Secure the thermostat to the box with the two
captive mounting screws provided.
Replace thermostat cover.
Set knob to desired room temperature.
Rough handling or strong pressure can
L1
1
L2 L1 L1
2
4
(HOT) L2
CT62ACT62B
1
4
5 CHECK OUT THERMOSTAT
Turn on the power to the heating system.
Turn setting knob all the way clockwise ; listen
for clicking sound as switch makes contact. Electric
heater should begin operation.
Turn knob all the way counterclockwise ; listen
for clicking sound as switch breaks contact. Electric
heater should shut off.
6 SETTING THERMOSTAT
Begin with setting knob at 70°F (20°C) on the scale.
If this setting is not satisfactory after at least two
hours of operation, turn setting knob upscale to
raise the temperature, or downscale to lower the temperature. Move knob only a degree each time.
o
F
7
0
5
6
7
0
6
5
5
5
8
0
8
5
T2 T1
3
TO
ELECTRIC
HEATER
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
2
BREAKS ON POSITIVE OFF.
3
EXPOSED UNUSED LEADWIRES TO BE PROPERLY INSULATED.
4
THERMALLY ACTIVATED—BREAKS ON TEMPERATURE
RISE. MAKES ON TEMPERATURE FALL.
CAUTION:
SPECIAL SERVICE CO/ALR SOLDERLESS CONNECTORS MUST
BE USED WHEN CONNECTING WITH ALUMINUM CONDUCTORS;
OTHERWISE, A FIRE HAZARD CAN RESULT.
T1
ELECTRIC
HEATER
M8420
69-0829—12
M8422
7 TROUBLESHOOTING
Your Honeywell thermostat requires little or no attention. Most problems can generally be traced to the following:
Symptom Checkout Action
No heat. Make sure power is on at
main service panel. Turn
the temperature setting
knob fully clockwise .
Improper connections to
thermostat.
Other. Contact a qualified electrician for assistance.
Heater never turns
off.
Thermostat setting
and thermometer
reading disagree.
Turn temperature setting
knob fully
counterclockwise .
Thermostat affected by
drafts or radiant heat.
Thermometer is out of
calibration.
Heater should start to warm up within two minutes. If not,
contact qualified electrician to check thermostat and heater.
With power to circuit OFF, tighten all wiring connections. Repair
any frayed or broken wires.
Heater should start to cool within minutes. If not, turn off power
at the main service panel, and contact qualified electrician.
Contact electrician to change the location. The thermostat
should be about 5 ft (1.5m) above the floor and on an inside
wall.
Recalibrate. See step 8.
8 CALIBRATION
The CT62 Thermostats are calibrated at the factory using
precise instruments under closely controlled conditions.
Recalibration should not be necessary. Allow the thermostat to operate for several hours before checking the
calibration. The CT62 Thermostat vapor-filled dual
diaphragm sensing element is affected by barometric
pressure and altitude. Temperature deviations of 1°F
(0.5°C) are normal. If the thermostat is mounted in a
suitable location and still appears out of calibration, check
calibration as follows:
Check Calibration
Turn the setting knob clockwise until the switch
makes (clicking sound). The heating equipment and
fan start.
No recalibration is necessary if the thermostat switch
makes with the thermostat setting at the same
temperature as indicated on the thermometer.
If the thermostat setting differs from the thermom-
eter, record the temperature difference and
recalibrate as instructed in the Recalibration Procedure
section.
Recalibration Procedure
Note the temperature difference between the
temperature setting and the thermometer.
Remove the thermostat cover.
Rotate setting knob clockwise until you hear
switch click.
Hold the setting knob firmly and rotate the set point
scale ring counterclockwise until the
12 o'clock position of the ring agrees with the cover
thermometer.
The heat from your hand will affect the diaphragm
sensor. Replace thermostat cover, wait five minutes
and recheck calibration.
THERMOSTAT
BASE
6
5
0
7
6
5
7
0
8
0
5
5
5
0
SETTING KNOB
AT 12 O'CLOCK
POSITION
SCALE RING
SETTING KNOB
M5796
3 69-0829—1
Honeywell warrants this product to be free from defects in the workmanship or materials, under normal use and service, for a
period of one (1) year from the date of purchase by the consumer. If, at any time during the warranty period, the product is
defective or malfunctions, Honeywell shall repair or replace it (at Honeywell’s option) within a reasonable period of time.
If the product is defective,
(i) return it, with a bill of sale or other dated proof of purchase, to the hardware or home center store from which you
purchased it, or
(ii) package it carefully, along with proof of purchase (including date of purchase) and a short description of the malfunction,
and mail it, postage prepaid, to the following address:
Honeywell Inc, RG Department in Canada: Honeywell Limited/Honeywell Limitee
1050 Berkshire Lane 740 Ellesmere Road
Plymouth, MN 55441-4437 Scarborough, Ontario M1P 2V9
This warranty does not cover removal or reinstallation costs. This warranty shall not apply if it is shown by Honeywell that the
defect of malfunction was caused by damage which occurred while the product was in the possession of a consumer.
Honeywell’s sole responsibility shall be to repair or replace the product within the terms stated above. HONEYWELL SHALL
NOT BE LIABLE FOR ANY LOSS OR DAMAGE OF ANY KIND, INCLUDING ANY INCIDENTAL OR CONSEQUENTIAL
DAMAGES RESULTING, DIRECTLY OR INDIRECTLY, FROM ANY BREACH OF ANY WARRANTY, EXPRESS OR IMPLIED, OR ANY OTHER FAILURE OF THIS PRODUCT. Some states do not allow the exclusion of incidental or consequential
damages, so this limitation may not apply to you.
THIS WARRANTY IS THE ONLY EXPRESS WARRANTY HONEYWELL MAKES ON THIS PRODUCT. THE DURATION OF
ANY IMPLIED WARRANTIES, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, IS HEREBY LIMITED TO THE ONE YEAR DURATION OF THIS WARRANTY. Some states do not allow
limitations on how long an implied warranty lasts, so the above limitation may not apply to your.
This warranty gives you specific legal rights, and you may have other rights which vary from state to state.
Limited One-Year Warranty
Home and Building Control
Honeywell International, Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
Home and Building Control
Honeywell Limited-Honeywell Limitée
35 Dynamic Drive
Scarborough, Ontario
M1V 4Z9
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