PRODUCT DATA

68-0258ES-04
W8835 EnviraZone Panel

APPLICATION

The W8835 EnviraZone Panel controls single-stage, multi-
stage, conventional or heat pump heat/cool equipment. It
controls three zones, and is expandable up to nine zones with
two additional W8703A Damper Interface Modules (DIM).
For Internet access: http://yourhome.honeywell.com.
For technical support, call: 1-800-828-8367.
IMPORTANT
Please read these instructions and keep them
in your records.

FEATURES

Controls up to three stages heat and two stages
cooling of single-stage, multi-stage, conventional, or
heat pump.
Controls up to three zones and can be expanded up to
nine zones with two W8703A DIM.
Uses VisionPRO® IAQ or FocusPRO communicating
thermostats for manual or automatic changeover by
zone.
Supports dehumidification, humidification and
ventilator controls.
Purge timer protects equipment between calls for heat
or cool with choice of panel or HVAC equipment-
controlled fan.
System and zone damper LEDs indicate system and
damper status.
Individual zone fan control.
Supports C7835 Discharge Air Temperature Sensor for
capacity control with adjustable high and low limits
and equipment failure indication.
Controls duel fuel equipment when used with an
external fossil fuel kit.

Contents

Application.........................................................................1
Features............................................................................2
Specifications....................................................................2
Ordering Information .........................................................2
Installation.........................................................................4
Startup and Checkout........................................................8
Operation...........................................................................8
Troubleshooting.................................................................11