Humidity control delayed after fan start
On initial start of the air handling unit all control functions assume normal temperature control before the humidity control is enabled.
The humidity control will be delayed after fan start (input "FanBeltIn" must be true), e.g. 5 minutes, adjustable by parameter SYS-03.
If the input "FanBeltIn" does not detect an airflow during normal operation, the module will be blocked immediately. This feature reduces the risk of wet ducts on initial start-up and fan belt alarms.
Note: If the outside air temperature is:
Description |
Default value |
SYS-03: delay after fan start |
300 sec |
OAT-01: high limit for humidification |
14 °C |
OAT-02: low limit for de-humidification |
15 °C |