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Constant Fan
In Constant Fan mode, the Zoneline operates in
High fan mode regardless of fan setting.
The constant fan 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 off. This
function shall be made 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 then reattempt to run
every 15 minutes. If the fan motor reaches the
proper RPM, the fault code will clear. If the error
does not clear, the fault code shall 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 the run indoor fan only
if it is trying to run in cooling mode.