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Sequence of Operation
Fire/Smoke detector input
The WSHP Open can read the status of a normally closed FSD contact input to determine if a fire or smoke
detector alarm is present. If the controller determines an alarm condition is present, all heating, cooling, and the
fan are disabled. The switch is factory-set to Normally Closed and cannot be changed.
Shutdown input
The WSHP Open controller has a shutdown input (software point) which, when set to its Active mode causes the
WSHP to safely shutdown in a controlled fashion. Heating and cooling is disabled after any minimum runtime
conditions expire and the fan is disabled after the fan-off timer expires. All alarms are reset but any active alarm
remains active. After the shutdown input transitions from Active mode to Inactive, the WSHP Open restarts after
the configured power fail restart delay expires.
Indoor fan
You can configure the indoor fan to operate in any one of 3 Fan Modes:
•
Auto - intermittent operation during both occupied and unoccupied periods
•
Continuous (default) - intermittent operation during unoccupied periods and continuous during occupied
periods
•
Always on - operates the fan continuously during both occupied and unoccupied periods
In the Continuous default mode, the fan is turned on when any one of the following is true:
•
It is in occupied mode, which is determined by the occupancy status
•
There is a demand for cooling or heating in the unoccupied mode
•
There is a call for dehumidification (optional)
When power is reapplied after a power outage, there is a configurable delay of 5 - 600 seconds (default 60)
before starting the fan. You must configure the fan delay:
•
The Fan On Delay defines the delay time (0 - 30 seconds, default 10) before the fan begins to operate after
heating or cooling is started.
•
The Fan Off Delay defines the delay time (0 - 180 seconds, default 45) the fan continues to operate after
heating or cooling is stopped.
NOTE The fan continues to run as long as the compressors, heating stages, or the dehumidification relays are on.
If the SPT failure alarm, ZS Sensor failure alarm, or condensate overflow alarm is active, the fan is shutdown
immediately, regardless of occupancy state or demand.
WSHP Open v3
Integration Guide
24
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Table of Contents
Troubleshooting
