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Honeywell Communicating Programmable Thermostat

T8635L Microelectronic Communicating Programmable thermostat.  Now you can offer a zoning system that delivers next-generation advantages.  Quick and simple installation.  Broad application flexibility. And the comfort and consumer-friendly features that homeowners-particularly those in the move-up and custom home markets-want.

It's the Honeywell Networked Zoning System.  This future ready system is designed to expand as exciting new products become available.  That mans repeat business opportunities for you.  
And the opportunity for your customers to take advantage of tomorrow's products and technologies. 

The T8635L Microelectronic Communication Programmable thermostat supports conventional gas, oil, or electric applications (up to 2H/2C) when used with the W8635A
Equipment Interface Module (EIM).  The T8635L supports single-stage heat pump applications (up to 2H/1C) when used with the W8635B Equipment Interface Module (EIM)
Use up to three thermostats with required W8635A,B EIM and optional W8703A Damper Interface Module to enable the following features:
  • Seven-day programmable
  • Programmable fan
  • On-demand/continuous backlight display
  • Filter indication timer
  • One-tough Daylight Savings Time key
  • Premier White color
  • Required accessories (not included):
    W8635A EIM for up to 2H/2C conventional systems
    W8635B EIM for up to 2H/1C hat pump systems
  • Optional accessories:
    C7089B Outdoor Temperature Sensor for outdoor temperature display
    W8703A Damper Interface Module for up to three zones of control 















T8635L Thermostat Description
       Model                 System                Changeover                 System Selection                  Fan Selection
 T8635L & W8635A     Heat/Cool           Automatic or Manual           Heat-Off-Cool-Auto                 On-Auto
T8635L &  W8635B     Heat Pump         Automatic or Manual        Heat-Off-Cool-Auto Em.Ht         On-Auto
Reliability You Can count On
  • Miswiring protection guards against damage to equipment and devices
  • Resettable fuse protects panel against incorrectly wired zone dampers


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Metropac Industries: HVAC Master Distributors
10 Annette Road Foxboro, MA 02035
Phone: 800-852-HEAT Fax: 508-698-3121