Honeywell CT62A 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.

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.

REMOVE OLD THERMOSTAT

THERMOSTAT MOUNTING

DIMENSIONS

WARNING

Begin by turning off power to the heating circuit at

the main service panel.

FRONT VIEW

SIDE VIEW

Remove cover of old thermostat—cover normally

snaps off when pulled firmly from the bottom. If it

-3/4

1/2 (13)

(

19)

(

48)

resists, check for a screw that locks the cover.

•

Loosen screws holding thermostat base to outlet

box and lift away.

•

(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.

-3/8

(

111)

-1/4

(

83)

Check the old insulation for cracks, nicks or fraying,

and apply high quality plastic tape where necessary

for adequate insulation.

-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

WIRE AND MOUNT NEW THERMOSTAT

Turn the temperature setting knob to 65°F (18°C).

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.

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.

(

HOT)

CT62B

CT62A

M8422

ELECTRIC

HEATER

ELECTRIC

HEATER

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD

PROTECTION AS REQUIRED.

BREAKS ON POSITIVE OFF.

EXPOSED UNUSED LEADWIRES TO BE PROPERLY INSULATED.

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.

M8420

69-0829—1

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.

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

69-0829—1

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 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

050 Berkshire Lane

Plymouth, MN 55441-4437

in Canada: Honeywell Limited/Honeywell Limitee

740 Ellesmere Road

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 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

985 Douglas Drive North

Golden Valley, MN 55422

Scarborough, Ontario

M1V 4Z9

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