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For Internet access: 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 tonine zones with two W8703A DIM. • Uses VisionPRO® IAQ or FocusPRO communicatingthermostats for manual or automatic changeover by zone. • Supports dehumidification, humidification andventilator 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 limitsand equipment failure indication. • Controls duel fuel equipment when used with anexternal fossil fuel kit. Contents Application.........................................................................1 Features ............................................................................2 Specifications ....................................................................2 Ordering Information .........................................................2 Installation .........................................................................4 Startup and Checkout........................................................8 Operation...........................................................................8 Troubleshooting.................................................................11 68-0258ES-04 W8835 ENVIRAZONE PANEL W8835 ENVIRAZONE PANEL Input Ratings: Voltage: 20-30 Vac, 50/60 Hz. Power: 11 VA nominal, Class II. Output Ratings (dampers and HVAC equipment): 1.5A run, 200,000 cycles (30 Vac) 3.5A inrush. 1.5A run, 100,000 cycles (30 Vac) 7.5A inrush. Humidity Ratings: 90 percent RH at 95°F, non-condensing. Temperature Ratings: Shipping: -20 to 120°F. Operating: -40 to 150°F. LED: SYSTEM mode LEDs (5) used to communicate equipment status: Red Heat: Heat mode. Green Cool: Cool mode. Yellow Purge: Purge mode. Green Fan: Fan mode. Red Em Heat: Emergency Heat mode. ZONE LEDs (3) used to communicate damper status: Green: Dampers are open or opening. No Color: Dampers are closed or closing. COM LED (1) used to indicate communication status: Flashing Green: Panel is transmitting or has received data. No color: Communications are idle. Dimensions: 12-3/4 in. W x 10-3/4 in. H x 1-7/8 in. D. See Fig. 1. ORDERING INFORMATION Finish: W8835: Taupe cover, olive-gray base. Mounting: Mounts with four screws (provided) through holes in cabinet back (wall anchors provided). Wiring: Eighteen-gauge wire for all equipment and system connections. Wiring Connections: EnviraCom: Four terminal strips (each with three terminals labeled 1, 2, 3). Dampers: Three terminal strips labeled M6 (Closed), M4 (Open), M1 (Common). Transformer 1: R (hot), C (Common). Transformer 2: T1 (hot), T2 (Common). Equipment: Rc, Rh, W1/E, W2, W3/Aux, Y1, Y2, G, O/B. Humidifier: HUM, HUM. Dehumidifier: DHUM, DHUM. Ventilator: VENT, VENT. Thermostats: VisionPRO® IAQ TH9421 or FocusPRO THM5320C Thermostats controls single- or multi-stage conventional and heat pump equipment. Accessories: For required accessories, see Table 2. Optional accessories include the W8735 Telephone Access Module for telephone dial-in and dial-out capability, and the W8703 Damper Interface Module to control additional zones. When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the TRADELINE® Catalog or price sheets for complete ordering number. If you have additional questions, need further information, or would like to comment on our products or services, please write or phone: 1. Your local Honeywell Automation and Control Products Sales Office (check white pages of your phone directory). 2. Honeywell Customer Care 1885 Douglas Drive North Minneapolis, Minnesota 55422-4386 In Canada—Honeywell Limited/Honeywell Limitee, 35 Dynamic Drive, Toronto, Ontario M1V 4Z9. International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France, Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A. 68-0258ES—04 2 W8835 ENVIRAZONE PANEL W8835 ENVIRAZONE PANEL See Table 1 for suggested dampers. Dampers are connected to dampers, refer to RRD installation instructions for maximum M1 Common, M4 Open, and M6 Closed (see Fig. 5 through 8 number of dampers. for hookups). Connect no more than five ARD or ZD dampers to an individual zone. Connect no more than five ARD or ZD dampers to the panel when using one 40 VA transformer; connect no more than ten ARD or ZD dampers when using two 40 VA transformers. Motor Terminal Damper Action Common/M1 Common Open/M4 Power Open Closed/M6 Power Close 10-3/4 (273) 12-3/4 (324...