S1-CVD090T01 / S1-CVD135T01
Central Ventilating Dehumidifier
Owner’s Manual
READ AND SAVE THESE INSTRUCTIONS
Johnson Controls
Unitary Products
Thank you for your purchase of the Central Ventilating Dehumidifier. Your dehumidifier is designed to remove humidity from your home,
maintaining the humidity at a comfortable level and reducing the unwanted effects of high humidity. Use your Central Ventilating Dehumidifier to
control the humidity that comes into the home from opening doors and infiltration (i.e. outdoor air entering through the building envelope). You
can reduce the amount of humidity that enters the home by closing windows, doors and/or fireplace flues when the outdoor humidity is high and
by drying clothes outside. Whirlpool tubs and saunas will also increase the amount of humidity in the home. Direct exhaust from kitchen vents
and bath fans is the best means of controlling humidity due to cooking and showers/baths. Your Central Ventilation Dehumidifier is not designed
to eliminate or reduce condensation on windows in the winter and works best when the indoor temperature is above 65°F (18°C).
WHOlE HOME DEHUMIDIfICATION
The Central Ventilating Dehumidifier controls the humidity level in your entire home. A powerful blower inside the dehumidifier draws air into the
cabinet, filters and removes moisture from the air, and then discharges the dry air to the home. Inside the cabinet, a sealed refrigeration system
removes moisture by moving the air through a series of tubes and fins that are kept colder than the dew point of the incoming air. The dew point
is the temperature at which moisture in the air will condense, much like what occurs on the outside of a cold glass on a hot summer day. The
condensed moisture drips into the dehumidifier drain pan to a drain tube routed to the nearest floor drain – no need to empty a tub every day.
After the moisture is removed, the air moves through a second coil where it is reheated before being sent back into the home. It is normal for the
air leaving the dehumidifier to be warmer than the air entering the dehumidifier.
SETTINg THE DESIRED HUMIDITy lEVEl
At the inlet side of the unit, a humidity control knob sets the desired
humidity level between 1 (less dry, dehumidifier runs less) and
7 (more dry, dehumidifier runs more), or can be used to turn the
dehumidifier OFF. The ON/OFF switch on the front of the unit should
be left ON and only be used to turn the dehumidifier off when
performing maintenance (see page 3 for maintenance requirements).
Set the control at a Normal level, between 3 and 4, when first
installed. Allow the dehumidifier to run for 24 hours before deciding if
you want to change the setting.
Humidity Control Knob
90-1327
filter
Access
Humidity
Control
Inlet
Drain
line
On/Off
Switch
filter
Access
Outlet
1