Honeywell CT62B Thermostat User Manual

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CT62A,B  
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  
Your Honeywell Thermostat  
WARNING  
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.  
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.  
1
PREPARATION  
Carefully unpack your new thermostat. To avoid  
damage to the sensing element, do NOT remove  
the thermostat cover until wiring has been completed.  
Proper installation of your Honeywell thermostat will  
occur 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.  
Save packages of screws, instructions, receipt and  
proof-of-purchase.  
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.  
3
REMOVE OLD THERMOSTAT  
THERMOSTAT MOUNTING  
DIMENSIONS  
2
WARNING  
Begin by turning off power to the heating circuit at  
the main service panel.  
FRONT VIEW  
SIDE VIEW  
3
/4  
Remove cover of old thermostat—cover normally  
snaps off when pulled firmly from the bottom. If it  
1
-3/4  
1/2 (13)  
(
19)  
(
48)  
resists, check for a screw that locks the cover.  
8
0
7
0
6
0
Loosen screws holding thermostat base to outlet  
box and lift away.  
5
0
˚
F
2
(54)  
-1/8  
Disconnect wires from old thermostat. As you  
disconnect each wire, tape the end and label it with  
the letter of the terminal designation to make reconnection  
to new thermostat easier.  
4
-3/8  
(
111)  
3
-1/4  
(
83)  
Check the old insulation for cracks, nicks or fraying,  
and apply high quality plastic tape where necessary  
for adequate insulation.  
2
-7/8 (73)  
1-1/2  
1/2 (13)  
M5795A  
(
39)  
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  
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4
WIRE AND MOUNT NEW THERMOSTAT  
Turn the temperature setting knob to 65°F (18°C).  
5
CHECK OUT THERMOSTAT  
This will prevent accidental damage to the knob  
Turn on the power to the heating system.  
Turn setting knob all the way clockwise  
stop during mounting.  
; listen  
Remove thermostat cover by grasping the top and  
bottom ends with fingers, and pulling outward.  
for clicking sound as switch makes contact. Electric  
heater should begin operation.  
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.  
Turn knob all the way counterclockwise  
for clicking sound as switch breaks contact. Electric  
heater should shut off.  
; listen  
IMPORTANT: Do not press on setting knob.  
6
SETTING THERMOSTAT  
Secure the thermostat to the box with the two  
captive mounting screws provided.  
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 tempera-  
ture. Move knob only a degree each time.  
Replace thermostat cover.  
Set knob to desired room temperature.  
IMPORTANT: Rough handling or strong pressure can  
damage knob or sensing element, and change  
calibration.  
o
F
6
5
7
0
7
5
0
6
L1  
(
HOT)  
L2  
1
1
CT62B  
CT62A  
3
L2  
T2  
L1  
T1  
L1  
T1  
2
4
4
M8422  
3
TO  
ELECTRIC  
HEATER  
ELECTRIC  
HEATER  
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD  
PROTECTION AS REQUIRED.  
2
3
4
BREAKS ON POSITIVE OFF.  
EXPOSED UNUSED LEADWIRES TO BE PROPERLY INSULATED.  
THERMALLY ACTIVATEDBREAKS 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.  
M8420  
69-08291  
2
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7
TROUBLESHOOTING  
Your Honeywell thermostat requires little or no attention. Most problems can generally be traced to the following:  
Symptom  
No heat.  
Checkout  
Action  
Make sure power is on at  
main service panel. Turn  
the temperature setting  
knob fully clockwise  
Heater should start to warm up within two minutes. If not,  
contact qualified electrician to check thermostat and heater.  
.
Improper connections to  
thermostat.  
With power to circuit OFF, tighten all wiring connections. Repair  
any frayed or broken wires.  
Other.  
Contact a qualified electrician for assistance.  
Heater never turns  
off.  
Turn temperature setting  
knob fully  
Heater should start to cool within minutes. If not, turn off power  
at the main service panel, and contact qualified electrician.  
counterclockwise  
.
Thermostat setting  
and thermometer  
reading disagree.  
Thermostat affected by  
drafts or radiant heat.  
Contact electrician to change the location. The thermostat  
should be about 5 ft (1.5m) above the floor and on an inside  
wall.  
Thermometer is out of  
calibration.  
Recalibrate. See step 8.  
The heat from your hand will affect the diaphragm  
sensor. Replace thermostat cover, wait five minutes  
and recheck calibration.  
8
CALIBRATION  
The CT62 Thermostats are calibrated at the factory using  
precise instruments under closely controlled conditions.  
Recalibration should not be necessary. Allow the thermo-  
stat 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:  
THERMOSTAT  
BASE  
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.  
SETTING KNOB  
AT 12 O'CLOCK  
POSITION  
Recalibration Procedure  
Note the temperature difference between the  
temperature setting and the thermometer.  
SCALE RING  
Remove the thermostat cover.  
Rotate setting knob clockwise  
switch click.  
until you hear  
Hold the setting knob firmly and rotate the set point  
scale ring counterclockwise until the  
2 o'clock position of the ring agrees with the cover  
thermometer.  
SETTING KNOB  
M5796  
1
3
69-08291  
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Limited One-Year Warranty  
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 Honeywells 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  
050 Berkshire Lane  
Plymouth, MN 55441-4437  
in Canada: Honeywell Limited/Honeywell Limitee  
740 Ellesmere Road  
1
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.  
Honeywells 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 IM-  
PLIED, ORANY 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 PARTICU-  
LAR 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.  
Home and Building Control  
Honeywell International, Inc.  
Home and Building Control  
Honeywell Limited-Honeywell Limitée  
35 Dynamic Drive  
1
985 Douglas Drive North  
Golden Valley, MN 55422  
Scarborough, Ontario  
M1V 4Z9  

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