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system is in AUTO mode, dehumidify options are available if the last system
operation was a call for cooling.
To Select Dehumidification (non--programmable -- between NORMAL,
COOL TO, and OFF)
Press the features button three times. The first press displays the outdoor air
temperature, the second press displays the humidify options and the third press
will display the current dehumidify selections.
The mode button is used to cycle through the dehumdify selections.
Additional Dehumidify Comments
Dehumidification can be enhanced (with some efficiency loss) by turning blower
off immediately at the end of each cooling cycle (eliminating normal 90 sec
blower off delay). Where maximum humidity removal is desired, this should be
done. Fan coils have the capability of removing this off delay. On FK or FV Fan
Coils, set delay tap to 0/0. On standard fan coils, a jumper can be cut to disable
off delay. Refer to fan coil Installation Instructions for details. If FAN is set for
continuous operation (fan On icon displayed), G output is turned off for 5
minutes at the end of each cooling cycle as long as dehumidify demand exists.
Like humidify, dehumidify actions are initiated when humidity is 1% above
setpoint and are terminated when humidity drops to 1% below setpoint. This
prevents unnecessary toggling of dehumidify actions when humidity is near
setpoint.
Dehumidify Output and Equipment Connections
When there is a dehumidify demand, dry contact is activated, meaning that a
24VAC signal is removed from the DHUM output terminal. In other words,
dehumidify output logic is reversed -- output is turned On when no dehumidify
demand exists and is turned OFF when demand exists.
