Honeywell CT1802, CT1800, CT1801 User Manual

CT1800, CT1801, CT1802

Electromechanical Fuel Saver Thermostat and Wallplate/Subbase

CT1800 24V gas or oil heat, or 3 wire zone valves.

Installation Instructions

CT1801 24V gas or oil heat/cool. CT1802 24V central electric heat/cool or single stage

heat pump without auxiliary heat.

Not for use on line voltage (120V) millivolt systems

Recycling Notice

This control contains mercury in a sealed tube. Do place control in the trash at the end of its useful life.

If this control is replacing a control that contains mercury in a sealed tube, do

not

place your old control in the trash.

M3375

not

THERMOSTAT FEATURES

I—Front of thermostat.

LOW TEMPERATURE CONTROL LEVER (BLUE)

THERMOSTAT COVER

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.

HIGH TEMPERATURE CONTROL LEVER (RED)

THERMOMETER

M9613

24 HOUR PROGRAM DIAL (GRAY AREA FOR NIGHT SETTING)

PROGRAM PIN SLOT

THERMOSTAT COVER

III—Cover removed.II—Hinged cover lifted.

PROGRAM PINS FLIP-UP

PROGRAM INDEX WHEEL

TIME INDICATOR ARROW

COVER

PROGRAM PIN STORAGE

M9614

D.F. • Rev. 11-96 • Printed in U.S.A. • • ©Honeywell Inc. 1996 • Form Number 69-0394—3

AAA ALKALINE BATTERY (2) INCLUDED

24 HOUR PROGRAM DIAL (GRAY AREA FOR NIGHT SETTINGS)

CAPTIVE MOUNTING SCREW

PROGRAM INDEX WHEEL

1 69-0394—3

M3375

ADJUSTABLE HEAT ANTICIPATOR

TIME INDICATOR ARROW

LOW TEMPERATURE CONTROL LEVER (BLUE)

HEAT ANTICIPATOR SETTING LEVER

HIGH TEMPERATURE CONTROL LEVER (RED)

SWITCH BULBS

CAPTIVE MOUNTING SCREW

THERMOSTAT BASE

WALLPLATE (BEHIND THERMOSTAT. HELD ON BY TWO CAPTIVE SCREWS.)

M9615

1 PREPARATION

Check thermostat and wallplate suitability for your heating or heating/cooling system. Refer to Table 1.

TABLE 1—THERMOSTAT AND SUBBASE APPLICATIONS.

Thermostat

Model

CT1800 199986B Wallplate 2- or 3- wire, 150 to 30 volt control circuit. For gas or oil heating system or

Subbase Wallplate

Included For Use With

3-wire zone valve heating system. CT1801 Q682A1079 Subbase 4- or 5- wire, 15-30 volt control circuit. For gas or oil heating/cooling system. CT1802 Q682B1227 Subbase 4- wire, 15 to 30 volt control circuit. For single-stage heat pump without

Thermostat must be mounted on wallplate or subbase included in package to assure operation.

Assemble tools as required.

FLAT BLADE SCREWDRIVER

WIRE CUTTER/STRIPPER OR SHARP KNIFE, IF NEEDED TO STRIP WIRES

HAND OR POWER DRILL WITH 3/16 INCH DRILL BIT, IF NEEDED TO DRILL HOLES IN WALL

auxiliary heat or central electric heating/cooling systems that require the

thermostat to control the fan in heating.

If wallplate or subbase is mounted on a vertical

outlet box (check old installation), order 196393A Cover Plate and Adapter Ring (see appropriate illustration in Step 4). To order check your telephone directory for your local Honeywell distributor.

Test to make certain that your heating and cooling

systems are working. If either one does not work, contact your local heating/air conditioning dealer.

NOTE: Do not operate cooling sytem if outdoor tempera-

MASKING TAPE, IF NEEDED TO LABEL WIRES DISCONNECTED FROM OLD THERMOSTAT

ture is below 50°F (10°C)

Tu rn off power to the heating/cooling system at the

main fuse panel.

LEVEL TO LEVEL THERMOSTAT FOR ACCURATE OPERATION

M834A

2 UNPACK THERMOSTAT

Remove and discard shipping wrap. Save package of screws, instructions and receipt.

Remove thermostat cover by lifting up from the bottom.

Carefully remove insert protecting switch bulbs.

Loosen two captive mounting screws, and separate wallplate or subbase from back of thermostat base.

3 REMOVE OLD THERMOSTAT

Remove cover of old thermostat. If the cover does not snap off when pulled firmly from the bottom,

check for a screw that locks on the cover.

Before removing the old thermostat from the wall, look at it carefully to locate the heat anticipator

adjustment mechanism. (See illustration to help you

69-0394—3 2

THERMOSTAT COVER

LIFT COVER

CAPTIVE MOUNTING

THERMOSTAT BASE

recognize the heat anticipator.) Make a note here of that anticipator setting for future reference. If your thermostat does not have a heat anticipator, do not be concerned. Move on to next paragraph.

Loosen screws holding thermostat to wallplate,

subbase or wall and lift away.

SCREWS

M9617

BULB SWITCH

ANTICIPATOR SCALE

ANTICIPATOR

M6115

SETTING LEVER

Disconnect wires from old thermostat, wallplate or

subbase. Tape each end and label with the letter of the terminal designation to make reconnection easier. If there are only two wires labeling is not necessary.

4 MOUNT WALLPLATE OR SUBBASE

IMPORTANT:

One or two extra wires?

If you are replacing a Honeywell Chronotherm you may find one or two wires that go to the clock terminals on the Chrontherm not allow them to touch, or you may damage your transformer. Disconnect the wires, and wrap them separately, using electrical tape. Do not wrap them together. Place the wires where they will not interfere with the operation of the new thermostat. Record the colors and terminal designation labels of the remaining wires.

If old thermostat has B or O terminals, this thermostat cannot be used on your system. EXCEPTION: The CT1802 Thermostat can be used on a system with B or O terminals.

Thermostat,

Thermostat wiring wallplate. Do

EXISTING HORIZONTAL OUTLET BOX

FAN

AUTO OFF

HEATON

If mounting on outlet box , mount as shown in appropriate illustration.

When mounting on wall, hold wallplate or subbase in

position and mark holes on wall. Use level to make sure wallplate or subbase will be level. Drill 3/16 in. holes and gently tap anchors into holes until flush with the wall.

3 SCREW HOLES WITH PLASTIC ANCHORS

FAN

HEATING/COOLING SUBBASE

AUTO OFF

HEATON

HEATING/ COOLING SUBBASE

COOL

M1553A

COOL

M1552A

EXISTING HORIZONTAL OUTLET BOX

HEATING-ONLY WALLPLATE

M856A

Position wallplate or subbase as shown in appropriate figure, and loosely insert the screws supplied.

Carefully level the wallplate or subbase and firmly tighten screws.

M866

MOUNTING SCREWS (2)

VERTICAL OUTLET BOX

ADAPTER RING

SUBBASE OR WALLPLATE

MOUNTING SCREWS (2)

COVER PLATE

196393A ASSEMBLY

3 69-0394—3

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