Specifications

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Filter Status (DFS)
The FHP-560/583 controller has the option of providing a filter alarm for indicating that the filter
needs servicing. The filter-status service option may be implemented with hardware or with fan
run time. For dedicated functionality (without expansion module), the filter switch hardware is
connected directly to IN-5 with a contact closure indicating a service event and the equipment
integrator must configure the dedicated filter switch option.
For the input expansion module the filter switch hardware must be connected to one of the
appropriated inputs. Option selection will determine the location for connecting the filter switch
input.
The following applies to the Filter Status:
• The filter switch input may be used with connected to the input expansion module.
• The filter status (replacement) may be configured for accumulated running time.
• The total fan run time prior to filter service is user configurable, 2000 hrs.
• The filter timer may be reset upon the filter being serviced.
Damper End Switch (DES)
The Damper End Switch (DES) option is typically used with Discharge Air Control (DAC)
applications where the outside air damper must be opened prior to compressor operation.
Damper End Switch (DES) must be asserted TRUE prior to enabling compressor operation when
the option is installed with the expansion unit.
The Input Expansion Module is used when connecting the DES input, and it may be configured
with the following option:
• Filter Switch, Fan Status Switch, Damper End Switch.
The DES must be selected on BACview menu to enable the option and if it is not enabled, a
TRUE signal will be asserted for DES, allowing immediate compressor operation. When DES is
enabled a time delay of 10 seconds will be asserted after the signal has been removed.