Honeywell International Inc. THX9001R01 Manuale Utente

This booklet contains installation instructions and information on the thermostat
and wireless accessories. Separate installation instructions for the furnace or
air handler and outdoor AC condensing unit or heat pump are provided with the
appropriate equipment. This thermostat is designed exclusively for use with the
ComfortNet communicating system.

This control may only be used with certain system configurations. Valid system
configurations for which this control can be used are:

•  A communicating air handler matched with a communicating outdoor AC

condensing unit.

•  A communicating air handler matched with a communicating outdoor heat

pump unit.

•  A communicating furnace matched with a communicating outdoor AC

condensing unit.

•  A communicating furnace matched with a communicating outdoor heat

pump unit.

•  A communicating furnace matched with a non-communicating single stage

AC condensing unit.

1.

Remove and inventory all ComfortNet components. The box contains the ComfortNet CTK03

communicating thermostat, lithium coin cell battery, wall mounting screws and anchors, sys-

tem installation guide, operating manual, AT120A1004 transformer with mounting hardware

and a wiring set that includes two terminal blocks and wires.

2. 

Carefully separate the thermostat body from the thermostat base.

3. 

Place base at installation location and mark mounting hole locations on wall using base as a

template.

4. 

Drill mounting holes.

5.

Attach base firmly to wall using two mounting screws. Leveling is for appearance only and

will not affect thermostat operation.

6.

Connect wires to terminal block on base.

7. 

18 AWG solid wire is recommended.

8.

Push excess wire into wall and plug hole with a fire resistant material (such as fiberglass

insulation) to prevent drafts from affecting thermostat operation.

9. 

Insert coin cell battery in the back of the thermostat.

10.  Carefully line up the thermostat with the base and snap into place.

REMOVE AND INVENTORY ALL

COMFORTNET

™

 COMPONENTS

 

REMOVE OUTDOOR UNIT

COVER AND 7-PIN 

CONNECTOR

NOTE: CONTAINS THE CTK03 THERMOSTAT, LITHIUM COIN CELL BATTERY, 

WALL MOUNTING SCREWS AND ANCHORS, SYSTEM INSTALLATION GUIDE, 

OPERATING MANUAL, AT120A1004 TRANSFORMER WITH MOUNTING 

HARDWARE AND A WIRING SET THAT INCLUDES TWO TERMINAL 

BLOCKS AND WIRES.

P/N F04

30675

00

5

INSTALL HVAC COMPONENTS

GAS

FURNACE

AIR

HANDLER

TERMINALS 1 & 2 ARE
COMMUNICATIONS 
WIRES. THEY SHOULD 
NEVER BE CONNECTED
TO THE 24 VAC R&C 
POWER SUPPLY
TERMINALS.     

CONNECT 4-WIRES

    FROM STAT AND 2 

        OR 4 WIRES FROM 

              OUTDOOR UNIT

P/N F0430679005

P/N F0

43067

3005

CONNECT TO THE OUTDOOR UNIT 

LOW (24 VAC)

VOLTAGE

HIGH

VOLTAGE

TRANSFORMER LOW 

 VOLTAGE CONNECTED 

 TO R AND C 

 TERMINALS

CONNECT 2-WIRES TO 

INDOOR UNIT

CONNECT HIGH VOLTAGE TRANSFORMER LEADS TO L1 

AND L2 MALE SPADE TERMINALS ON CIRCUIT BOARD. 

DO NOT CONNECT R AND C BETWEEN THE INDOOR UNIT 

AND OUTDOOR UNIT. SEE PAGE 5.

TRANSFORMER

(AT120A1004)

INSTALL THERMOSTAT ON INTERIOR WALL

NOTE: THERMOSTAT WILL 
AUTOMATICALLY CONFIGURE 
TO THE SYSTEM ONCE HIGH
VOLTAGE POWER IS 
APPLIED TO THE 
INDOOR AND 
OUTDOOR 
EQUIPMENT. 

M33174

REMOVE 9-PIN CONNECTOR

FROM FURNACE OR AIR 

HANDLER CONTROL

AIR CONDITIONER
OR HEAT PUMP

AIR CONDITIONER
OR HEAT PUMP