Honeywell ENVIRAZONE PANEL W8835 Product Data page 9

COM LED Operation
The green COM LED flickers as the W8835 communicates
with the other EnviraCom devices:
LED blinks rapidly—indicates device is currently
transmitting information on the communications bus.
LED
Heat Red
Cool Green
Purge Amber
Fan Green
Em Heat Red
Zone 1, 2, 3 Green
b
An LED change precedes the corresponding relay change by as much as six seconds.
Purge Mode
At the end of every call for heat or cool, the panel enters a
Purge mode. DIP 4 configures the panel to purge for two
(default) or three and one-half minutes. DIP switch 5
configures the panel or the HVAC equipment to operate the fan
during purge.
The Purge LED lights to signal that the system is in the Purge
mode. Pressing the purge override button overrides the Purge
mode.
Unless there is a new call for heat or cool during the Purge
mode, all dampers are moved to the Open position at the end
of purge. DIP switch 6 is used if it desired to open all dampers
during the Purge mode.
Table 4. Purge Configuration
DIP Switch
Number
4 Off (Down)
4 On (Up)
Table 5. Fan Control Configuration
DIP Switch
Number
5 Off (Down)
5 On (Up)
Table 6. Purge Damper Configuration
DIP Switch
Number
6
6 Off (Down)
Table 3. LED Indicators
Color
Heat call.
Cool call.
Purge mode.
Fan only call.
Emergency Heat mode.
Damper is open or opening.
Status Purge
3.5 minutes purge
2 minutes purge
Status Fan Control
Panel control of fan
in Purge
HVAC control of fan
in Purge
Status Purge Damper
On (Up) Last zone(s) calling
open during Purge
Open all dampers
during Purge
LED blinks once—indicates device received and
acknowledged a message.
LED on constantly— indicates panel failure. Replace panel.
LED off constantly—indicates a wiring problem.
b
Illuminated
Individual Zone Fan Control
When all zones are satisfied, the fan switch of each thermostat
controls the fan operation for that zone. When the fan setting is
" On", the fan is energized, the fan LED illuminates and the
dampers close to zones where the fan setting is "Auto". If there
is a call for heat or cool during this time, the fan mode ceases,
and the heat or cool call is honored. When the zone calling is
satisfied, and Purge mode has ended, the fan call resumes.
Single and Multi-Stage Conventional
Heat Operation
The panel can control up to three stages of heating and two
stages of cooling based on thermostat demand. Set DIP
switches 1 and 2 for 1, 2 or 3 stages of heat. Set DIP switch 7
for one or two stages of cooling.
Table 7. Conventional Equipment Configuration
Equipment Type
1 Stage Conventional
2 Stage Conventional
3 Stage Conventional
Cooling Stage
1 Stage
2 Stage
9
W8835 ENVIRAZONE PANEL
Not Illuminated
No heat calls.
No cool calls.
Not in Purge mode.
No fan only call.
Not in Emergency Heat mode.
Damper is closed or closing.
1 Stage Cooling
DIP 1 DIP 2
On (Up) On (Up)
On (Up) Off (Down)
Off (Down) On (Up)
2 Stage Cooling
DIP7
On (Up)
Off (Down)
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