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Non-programmable Heat and/or Cool
Low Voltage (20 to 30 Vac) Thermostat and Wallplate
Model CT500
Congratulations on purchasing your new thermostat!
More than 100 years of engineering expertise enabled
this thermostat to provide you with a more comfortable
and convenient living environment.
Direct any questions about this thermostat to the
Honeywell Customer Relations Center at
www.honeywell.com/yourhome or 1-800-468-1502,
Monday - Friday, 7:00 am - 5:30 pm, Central time.
® U.S. Registered Trademark
Copyright © 2003 Honeywell International Inc. •
CT500 Electronic Thermostat
• All Rights Reserved
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. Dispose of it properly.
Contact your local waste management authority
for instructions regarding recycling and the
proper disposal of an old control. If you have
questions, call Honeywell at 1-800-458-1502.
1 PREPARE FOR INSTALLATION
Check Table 1 to be sure this thermostat is compatible
with your system. If not, return it to the retailer. For
more information, call Honeywell at 1-800-468-1502.
Acquire tool and items as needed. See Fig. 1.
CROSS-RECESSED
SCREWDRIVER
WIRE CUTTER/STRIPPER OR SHARP
KNIFE, IF NEEDED TO STRIP WIRES
LEVEL, IF NEEDED TO LEVEL
THERMOSTAT FOR APPEARANCE
Fig. 1. Required installation tools and supplies.
OWNER'S GUIDE
HAND OR POWER
DRILL WITH 3/16 INCH
DRILL BIT, IF NEEDED TO
DRILL HOLES IN WALL
M18920
69-1525-2
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Table of Contents
Related Manuals for Honeywell CT500
Summary of Contents for Honeywell CT500
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Page 1: Prepare For Installation
Monday - Friday, 7:00 am - 5:30 pm, Central time. LEVEL, IF NEEDED TO LEVEL M18920 THERMOSTAT FOR APPEARANCE Fig. 1. Required installation tools and supplies. ® U.S. Registered Trademark Copyright © 2003 Honeywell International Inc. • • All Rights Reserved 69-1525-2... -
Page 2: Remove Old Thermostat
Not compatible with any 120/240 volt circuit. Not compatible with 2-wire White-Rodgers no. 1361 zone valves. Not compatible with millivolt systems. Compatible with 2-wire Honeywell zone valves. Isolating relay required for 3-wire thermostat zone valves. 2 REMOVE OLD THERMOSTAT WIRES THROUGH... -
Page 3: Mount Wallplate
See Fig. 7. Tighten the terminals. Plug the hole in the wall with insulation to help prevent The CT500 Thermostat is powered through the heating/ drafts from adversely affecting thermostat operation. cooling system and is adaptable to most 4-wire, 18 to 30 Vac heating-cooling systems. -
Page 4: Operate Your Thermostat
M12537 display. The indicator points to Set when the temperature setpoint is displayed and to Room Fig. 7. CT500 methods for wiring connection. when the room temperature is displayed. 5 MOUNT THERMOSTAT TO INDICATOR WALLPLATE... -
Page 5: Cooling System
SYSTEM SWITCH the cooling equipment. M11020A Press the key to raise the temperature setting Fig. 9. CT500 temperature display above the room temperature. The cooling equipment and System/Fan switches. should shut down. Fan Switch Slide the System switch to Off and the Fan switch to The Fan switch settings are: On. - Page 6 CT500 ELECTRONIC THERMOSTAT 4. Press the key again to display °C or °F. 7. Press the key to display heating/cooling temper- ature control default. M14688 M18419A 5. Press the key to change the °C or °F indication. 8. Press the key again to change heating/cooling temperature control to C1 or C3.
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Page 7: 10 Troubleshooting
CT500 ELECTRONIC THERMOSTAT 10 TROUBLESHOOTING See Table 3 to troubleshoot your thermostat. Table 3. Troubleshooting Your Thermostat. Symptom Possible Cause Corrective Action Heating/cooling No power to the Check power to heating/cooling equipment: equipment does not thermostat. — On/Off switch. operate. -
Page 8: Limited One-Year Warranty
Honeywell warrants this product, excluding battery, to be free from defects in the workmanship or materials, under normal use and service, for a period of one (1) year from the date of purchase by the consumer. If, at any time during the warranty period, the product is defective or malfunctions, Honeywell shall repair or replace it (at Honeywell’s option) within a reasonable period of time.