Delay for fan enable

With parameters ALM-01 and ALM-02 the delay  to enable the "SupFanEnable" and "ExhFanEnable" outputs can be defined. This delay should be set to a value greater or equal to the damper runtime (= alarm delay).


The "SupFanEnable" output will open only, when the outside air damper is open and there is no damper alarm "OADAlarm" or "EADAlarm".

The "ExhFanEnable" output will open only, when the exhaust air damper is open and there is no damper alarm "OADAlarm" or "EADAlarm".


When damper end-switches are connected ALM-02 = 1, the respective fan enable signals will be released as soon as the end switch contacts are opened.

Without damper end switches:


Notes: If during normal operation one of the damper end switches fails again the fan enable signals "SupFanEnable" and "ExhFanEnable"  will be immediately reset to “0”.


Description

Default value

ALM-01: damper run-time

150 sec

ALM-02: end switch is connected

0