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Constant Fan
In Constant Fan mode, the Zoneline operates in
High fan mode regardless of fan setting.
This feature allows the fan to operate even when
the Zoneline is set in the OFF position. This will allow
continuous air circulation in the room even if the
Zoneline is turned oȺ. This function is available as
a selectable option through the use of an auxiliary
set button mode. The selection of this function will
override the CDC provision.
Fan Operation
Both fan motors are variable speed DC fan motors
with RPM feedback and regulation control. Any time
a fan is energized, the control checks that the fan
reaches the target RPM speed +/- 150 RPMs. If the
target cannot be met, the fan motor will shut down
for 15 minutes, and will set a fault code. It will re-
attempt to run every 15 minutes. If the fan motor
reaches the proper RPM, the fault code will clear. If
the fault does not clear, the fault code will be stored
in memory and the Zoneline will function as follows:
• For detected indoor fan failures, the Zoneline will
cease all operation until the next try to energize
the fan.
• For detected outdoor fan failures, the Zoneline
will revert to Stage 3 heating if it is trying to run
in Stage 1 or Stage 2 heating. The Zoneline will
then run the indoor fan only if it is trying to run
in cooling mode.
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