Non-Programmable Digital Communicating Thermostat
To be used with up to 3 Heat 2 Cool conventional and heat pump systems with W8835 Zone Panel or W8635 or THM5241 Equipment Interface Modules (EIM).
System Types
Must be installed by a trained, experienced technician
Read these instructions carefully. Failure to follow these instructions can damage the product or cause a hazardous condition.
Need Help?
For assistance with this product please visit http://yourhome.honeywell.com or call Honeywell Customer Care toll-free at 1-800-468-1502.
Drill 3/16” holes for drywall. Drill 7/32” holes for plaster.
CAUTION: ELECTRICAL HAZARD
Can cause electrical shock or equipment damage. Disconnect power before beginning installation.
MERCURY NOTICE
If this product is replacing a control that contains mercury in a sealed tube, do not place the old control in the trash. Contact your local waste management authority for instructions regarding recycling and proper disposal.
Thermostat Terminals (connect to network zone panel or EIM):
This thermostat does not use batteries. Installing batteries could lead to corrosion of the batteries and damage the thermostat.
Once wallplate is securely mounted on wall:
Follow the procedure below to configure the thermostat to match the installed heating/cooling system, and customize feature operation as desired.
0 Zone Instance
1 System type
2 Changeover valve (O/B terminal)
3 Fan control (heating)
5 Stage 1 heat cycle rate (CPH: cycles/hour)
6 Second Stage Heat Cycle Rate
7 Third Stage Heat Cycle Rate
8 Emergency Heat Cycle Rate
9 Stage 1 compressor cycle rate (CPH)
10 Second Stage Compressor Cycle Rate
12 Manual/Auto changeover
14 Temperature display
15 Compressor protection
19 Service Indicator
23 Backlight Mode
26 Aux Control
27 Heat temperature range stops
28 Cool temperature range stops
10 Heating system
20 Emergency heating system
30 Cooling system
40 Fan system
70 Thermostat information (for reference only)
CAUTION: Compressor protection is bypassed during testing. To prevent equipment damage, avoid cycling the compressor quickly.
Auxiliary heat control (Setup Function 26):
Diagnostic Codes (Setup Function 19):
When Error Codes are present the home screen of the thermostat will display “SERVICE NEEDED” and scroll through all active error codes. Setup Function 19 will display a list of the 10 most recent error codes, both active and inactive. The number on the right of the thermostat will show the number of active and inactive error codes saved in the thermostat. To view the error codes press the up arrow. To clear the list, press and hold both the up and down arrow keys. Active errors can not be cleared; the source of the error must be resolved prior to clearing from the list.
Please contact your distributor to order replacement parts.
Part Description Part Number
Small cover plate assembly: 50001137-001
Medium cover plate assembly: 50002883-001
12 pack of small cover plates: 50007297-001
12 pack of medium cover plates: 50007298-001
EnviraZONE Zone panel: W8835A1004
Equipment Interface Module for 2H/2C conventional systems: W8635A1006
Equipment Interface Module for 2H/2C heat pump systems: W8635B1004
Telephone Access Module: W8735B1003
2-Channel Telephone Access Module: W8735D1009
4-Channel Telephone Access Module: W8735D1017
Note: Use to cover marks left by old thermostats.
Honeywell International Inc. 1985 Douglas Drive North Golden Valley, MN 55422
Honeywell Limited-Honeywell Limitée 35 Dynamic Drive
Toronto, Ontario M1V 4Z9
http://yourhome.honeywell.com
Printed in the U.S.A. on recycled paper containing at least 10% post-consumer paper fibers.
® U.S. Registered Trademark.
© 2008 Honeywell International Inc. 69-2019EFS—02 M.S. Rev. 01-08
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