OPERATION
IO-DV090
IO-DV090
WWW.CLEANCOMFORT.COM
16
Humidity Control
The humidity control is an adjustable switch that closes
when the relative humidity of the air in which it is located
rises to the screen set point. The DV090 dehumidifier is
equipped with an automatic defrost mechanism. If the
dehumidifier operates in conditions that develop frost
on the evaporator, it will sense the frost build-up and
automatically defrost the evaporator. The dehumidifier
may not appear to be operating correctly during the
defrost sequence, but once the defrost sequence is
completed, the unit will resume dehumidifying.
Programmable Ventilation Timer –
DVP-4034748 / DVP-4034753
The ventilation timer controls the impeller fan and the
motorized fresh air damper. When the ventilation timer
is activated, the dehumidifier will circulate the indoor
air, and bring in fresh air from outside. The ventilation
timer should be set for the required ventilation of the
residence. The home should be ventilated with fresh air
as suggested by applicable codes and standards.If the
dehumidifier fails to ventilate as expected, check that the
time on the timer is correct. Also check the programs on
the timer to be sure that the timer is calling for ventila-
tion at the correct times
Motorized Ventilation Damper
The motorized ventilation damper is controlled by a field-
supplied ventilation timer, such as the Clean Comfort
DVP-4034748 control. The damper will open when the
ventilation timer is activated to allow fresh air into the
home through the 6" diameter fresh air inlet supply duct.
The motorized ventilation damper will remain closed when
the ventilation timer is not activated to prevent over-ventilating
the home when the unit is dehumidifying or recirculating
the indoor air. The motorized ventilation damper operates
on 24VAC from the control circuit.
I
CAUTION!
DO NOT connect high voltage to the damper motor or
damage to the motor may result.
I
CAUTION!
DO NOT force the blade of the damper by hand or
damage to the damper motor may result. The damper
opens in one direction only. The damper rotates very
slowly; allow sufficient time for the damper to cycle.
The damper opens in one direction only. It rotates very
slowly; be sure to allow sufficient time for the damper to
cycle. The damper will take approximately one minute to
cycle from closed to open or from open to closed.
If the motorized ventilation damper fails to operate:
1. Check that the wiring is correct and that voltage is
present at the damper motor.
2. Check for any obstruction inside the damper. If the
motorized ventilation damper fails to operate after
performing these checks, it must be replaced.
