Honeywell W8835A Manual page 9

LED
Heat Red
Cool Green
Purge Amber
Fan Green
Em Heat Red
Zone 1, 2, 3 Green
a
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 that holds open the calling zone damper for two
(default) or three and one-half minutes. During this time, the
panel or the HVAC equipment can be configured to operate the
fan.
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. The panel can be configured to open all dampers
during the Purge mode. If there is a call for the previous type of
conditioning during the Purge mode on non-compressor
systems, the panel immediately stops the Purge mode and
activates the equipment.
DIP Switch
Number
4
4
DIP Switch
Number
5
5
DIP Switch
Number
6
6
Table 3. LED Indicators
Color
Heat call.
Cool call.
Purge mode.
Fan only call.
Emergency Heat mode.
Damper is open or opening.
Status Purge Time
Off 3.5 minutes
On 2 minutes
Status Fan Control
Off Panel control of fan
in Purge
On HVAC control of fan
in Purge
Status Purge Damper
On Last zone(s) calling
open during Purge
Off Open all dampers
during Purge
a
.
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 switch is
in the On position, the fan is energized, the fan LED illuminates
and the dampers close to zones where the fan switch is in the
Auto position. If there is a call for heat or cool during this time,
the circulation mode ceases, and the heat or cool call is
honored. When the zone calling is satisfied, and Purge mode
has ended, the circulation 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.
Equipment Type
1 Stage Conventional
2 Stage Conventional
3 Stage Conventional
Cooling Stage
1 Stage
2 Stage
Heat Pump Operation
The panel can control one or two compressor stages plus
auxiliary heat. Set DIP switch 1 and 2 to Off; set DIP switch 7
to On for a single-stage compressor and to Off for a two-stage
compressor.
Equipment Type
Heat Pump
9
W8835A 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.
DIP 1 DIP 2
On On
On Off
Off On
DIP7
On
Off
DIP 1 DIP 2
Off Off
68-0258ES-1