PRODUCT DATA68-0258ES-04W8835 EnviraZone PanelAPPLICATIONThe W8835 EnviraZone Panel controls single-stage, multi-stage, conventional or heat pump heat/cool equipment. Itcontrols three zones, and is expandable up to nine zones withtwo additional W8703A Damper Interface Modules (DIM).For Internet access: http://yourhome.honeywell.com.For technical support, call: 1-800-828-8367.IMPORTANTPlease read these instructions and keep themin your records.FEATURES• Controls up to three stages heat and two stagescooling of single-stage, multi-stage, conventional, orheat pump.• Controls up to three zones and can be expanded up tonine zones with two W8703A DIM.• Uses VisionPRO® IAQ or FocusPRO communicatingthermostats for manual or automatic changeover byzone.• Supports dehumidification, humidification andventilator controls.• Purge timer protects equipment between calls for heator cool with choice of panel or HVAC equipment-controlled fan.• System and zone damper LEDs indicate system anddamper status.• Individual zone fan control.• Supports C7835 Discharge Air Temperature Sensor forcapacity control with adjustable high and low limitsand equipment failure indication.• Controls duel fuel equipment when used with anexternal fossil fuel kit.ContentsApplication.........................................................................1Features ............................................................................2Specifications ....................................................................2Ordering Information .........................................................2Installation .........................................................................4Startup and Checkout........................................................8Operation...........................................................................8Troubleshooting.................................................................11