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Honeywell CT40A Installation Instructions Manual

Heating thermostat
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Do-It Yourself Models
For 24 Vac, Heat-Only Systems
The CT40A Heating Thermostat replaces most 24 Vac,
2-wire heating system thermostats. It is suitable only for
gas or oil heating systems or for electric heating systems
that control the fan. The CT40A is not suitable for air
conditioning, heating/air conditioning, heat pump or line
voltage systems.
MERCURY NOTICE
If this control is replacing a control that contains
mercury in a sealed tube, do not place your old
control in the trash.
Contact your local waste management authority
for instructions regarding recycling and the
proper disposal of an old control containing
mercury in a sealed tube.
® U.S. Registered Trademark
Copyright © 2002 Honeywell •
CT40A Heating Thermostat
• All Rights Reserved
INSTALLATION INSTRUCTIONS

1 Prepare for Installation

To correctly install your Honeywell thermostat, follow
these step-by-step instructions. It is recommended that
as you read, understand and complete each step, you
check it off. If you are unsure about wiring procedures, be
sure to call a qualified service technician for assistance.
Check thermostat suitability for your home system by
reviewing the introductory paragraph.
Assemble tools required as shown in Fig. 1.
FLAT BLADE
SCREWDRIVER
WIRE CUTTER/STRIPPER OR SHARP
KNIFE, IF NEEDED TO STRIP WIRES
SPIRIT LEVEL, IF NEEDED TO LEVEL
THERMOSTAT FOR APPEARANCE
Fig. 1. Assemble required tools.
Be sure your heating system is working, especially if
inoperative for a length of time. If the heating system
does not work, contact your local heating dealer for
assistance.
Carefully unpack your new thermostat. Discard the
cardboard insert protecting the snap switch contacts.
Save the package of screws and all instruction pages.
2 Review Thermostat Features
See Fig. 2 for thermostat parts.
HAND OR POWER
DRILL WITH 3/16 INCH
DRILL BIT, IF NEEDED TO
DRILL HOLES IN WALL
M7337
69-0847B-1

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  Summary of Contents for Honeywell CT40A

  • Page 1: Prepare For Installation

    WIRE CUTTER/STRIPPER OR SHARP gas or oil heating systems or for electric heating systems KNIFE, IF NEEDED TO STRIP WIRES that control the fan. The CT40A is not suitable for air conditioning, heating/air conditioning, heat pump or line voltage systems.
  • Page 2: Remove Old Thermostat

    CT40A HEATING THERMOSTAT Push excess wire back into the wall and plug the hole with nonflammable insulation to prevent drafts from MOUNTING HOLE affecting thermostat operation. (THERMOSTAT TO Grasp the thermostat cover at the sides with one WALL OR OUTLET BOX) hand.
  • Page 3: Set Thermostat

    CT40A HEATING THERMOSTAT 6 Set Thermostat 7 Troubleshoot Thermostat Move the temperature setting lever to the required Your Honeywell thermostat requires minimal attention. temperature comfort level. Most problems can be corrected as described in Table 2. Table 2. Troubleshooting. Symptom...
  • Page 4: Limited One-Year Warranty

    M1V 4Z9 This warranty does not cover removal or reinstallation costs. This warranty shall not apply if it is shown by Honeywell that the defect or malfunction was caused by damage which occurred while the product was in the possession of a consumer.
  • Page 5: Caractéristiques Du Thermostat

    24 V c.a. ÉLECTRIQUE AVEC MÈCHE ED 3/16 po POUR Le thermostat pour chauffage CT40A peut remplacer la PERCER DES plupart des thermostats bifilaires de 24 V pour systèmes TROUS DANS LE de chauffage. Le CT40A convient seulement aux MUR AU BESION COUPE-FILS, PINCE À...
  • Page 6: Câblage Et Montage Du Thermostat

    CT40A THERMOSTAT POUR CHAUFFAGE 4 Câblage et montage du thermostat TROU DE MONTAGE Raccorder les fils qui sortent du mur aux bornes RÉGLAGE DE (POUR L'INSTALLATION LA RÉSISTANCE correspondantes à l'arrière du thermostat. Resserrer DU THERMOSTAT ANTICIPATRICE les vis. AU MUR OU SUR DE CHALEUR LA BOÎTE DE SORTIE)
  • Page 7: Vérification Du Thermostat

    Fig. 4. Réglage de valeur de la résistance anticipatrice de chaleur. 7 Dépannage Le thermostat Honeywell exige peu ou pas d'attention. 5 Vérification du thermostat La plupart des problèmes sont décrits au Tableau 2. Rétablir l’alimentation électrique du système de chauffage.
  • Page 8: Garantie Limitée D'un An

    GARANTIE LIMITÉE D'UN AN Honeywell garantit ce produit contre tout vice de fabrication ou de matière dans la mesure où il en est fait une utilisation et un entretien convenables, et ce, pour une période d'un (1) an à partir de la date d'achat. En cas de défectuosité...