Honeywell CT30 Owner's Manual

Low-Voltage Thermostat

® U.S. Registered Trademark. Patents pending. 

Copyright © 2009 Honeywell International Inc.

All rights reserved.

69-2338EFS-01

M29578

M23786 

If your old thermostat contains 

mercury, contact your local waste 

management authority for proper 

disposal instructions.

TURN OFF POWER at heating/cooling system (or fuse/circuit-breaker panel). 
Remove cover and thermostat, but leave wallplate with wires attached.

Is there a sealed tube containing mercury? 

If so, see mercury notice below.

Leave wallplate in place.

Old thermostat

Cover

Check package contents:

•

Thermostat

•

Coverplate

•

Wall anchors & screws (2 each)

•

Caution card

•

Wire labels

Before you begin, make sure you have:

•

No. 2 Phillips & small pocket screwdrivers

•

Hammer

•

Level (optional)

•

Pencil

•

Drill and bit (3/16” for drywall, 7/32” for

plaster)