Digital Input Mode; Bas Mode - FHP 641-224 User Manual

Auto Cool:
 Chageover Temperature > Changeover Setpoint + Change over dead Band
Auto Heat:
 Chageover Temperature < Changeover Setpoint - Change over dead Band
When using the changeover feature the system will require an air temperature sensor (10KΩ @
77°F (25°C) Thermistor) typically located in the controlled zone.

Digital Input Mode

When operating on Digital Input mode the unit will change from heat to cool and by using the
state of the digital input (IN6) on controller as follows:
 Off = Heat
 On = Cool
This feature is typically used when a remote switch is needed but no BAS is available, if a BAS
is available FHP recommends operating the unit by using the integration points as they will
provide additional and valuable information the end user.

BAS Mode

When operating on BAS mode the unit will change from heat to cool and by writing to the
Control Mode
integration point.
Please refer to the integration points list for additional information on how to make the unit part
of the BAS.
30