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W8835A ENVIRAZONE PANEL
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 T8635L communicating thermostats for manual
or automatic changeover by zone
• Supports future 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.
SPECIFICATIONS
Input Ratings:
Voltage: 20-30 Vac, 50/60 Hz.
Power: 11 VA nominal.
Output Ratings:
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.
ORDERING INFORMATION
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 Limitée, 35 Dynamic Drive, Scarborough, 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-1
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:
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.
Finish:
W8835A: 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.
Heat Pump Fault Indicator: L, C.
Thermostats:
T8635L1013 Thermostat controls single- or multi-stage
conventional and heat pump equipment.
Accessories:
For required accessories, see Table 2. Optional accessories
include the W8735B Telephone Access Module for
telephone dial-in and dial-out capability, W8703 Damper
Interface Module to control additional zones, and the
W8735A Serial Adapter Module for computer interface.
2
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