FHP AHP 641-224, Руководство пользователя, Страница: 31 / 42

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Lead - Lag Compressor operation
NOTE: This feature is only available on two stage systems.
The unit will alternate the compressors by using Lead Lag control algorithm; the rotation method
is user definable and can be set during the commissioning process as follows:
 Monthly

Daily

Time of Day
By default the unit will change its lead compressor if the one acting as lead fails.
The unit will provide the following compressor alarms:
Compressor 1 Runtime:
If the compressor runtime hours are greater than 8760.
Compressor 2 Runtime:
If the compressor runtime hours are greater than 8760.
Pump Control (optional)
The unit can control a pump by using Digital Output 1 (DO1) on controller; this feature can be
enable or disabled, set to run with compressors or continuously during the commissioning
process.

If commissioned to run continuously the pump will run when the unit is in occupied mode.

If commissioned to cycle with compressors the pump will be commanded on only when
the compressors are running.
The factory default is enabled to cycle with compressors.
The unit will provide the following compressor alarms:
Pump Runtime Alarm:
If the pump runtime hours are greater than 8760.