Honeywell CT62A, CT62B User Manual

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