The dehumidifier is supplied with two 8” round collars. An integral backflow damper is installed in the outlet collar. In a ducted installation, the
dehumidifier pulls air from the living space or HVAC return duct and supplies the dehumidified air to the HVAC supply duct (See
Figures 5, 6 & 7
).
DUCTED INSTALLATION
• Move supply collar to the desired location, if necessary. (See
Supply Collar
in
SET-UP
section.)
• The unit can be ducted to the supply or both the return and supply. The dehumidifier inlet ducting must be a minimum of 6” upstream of the
HVAC system air cleaner and the outlet must be ducted a minimum of 6” downstream of the cooling coil.
An additional option is to duct the dehumidifier inlet and outlet to the return duct. This installation must include wiring the dehumidifier to
activate the HVAC blower during dehumidification. (See
Wiring to HVAC System
in
WIRING
section.)
• Use the least amount of ductwork possible. To ensure best performance, do not exceed a total of 50 feet of duct installed in accordance with
SMACNA Standards. UL approved, 8” diameter, insulated duct is recommended for all connections.
• All joints and seams must be sealed.
DUCTING
HVAC / FURNACE
115 VAC
CIRCUIT
DEHUMIDIFIER
SUPPLY DUCT
RETURN
DUCT
A-COIL
DEHUMIDIFIED AIR IS SUPPLIED
DOWNSTREAM
FROM A-COIL TO
MINIMIZE EVAPORATION OFF A-COIL
AIR IS PULLED
FROM MAIN
RETURN DUCT
DEHUMIDISTAT WITH
SET POINT KNOB
CONDENSATE HOSE
(TO COMMON DRAIN OR OUTSIDE)
NOTE:
DO NOT BLOCK
FURNACE ACCESS
FIGURE 5 – Basement Installation
90-1423
MAIN RETURN
DUCT
DEHUMIDIFIER
MAIN SUPPLY DUCT
CONDENSATE
HOSE
(TO COMMON
DRAIN OR
OUTSIDE)
PRINCIPAL
LIVING SPACE
115 VAC
CIRCUIT
HVAC/FURNACE SYSTEM
SHOWN IN HORIZONTAL
ORIENTATION
DEHUMIDIFIED AIR IS SUPPLIED
DOWNSTREAM
FROM EVAPORATOR COIL
TO MINIMIZE EVAPORATION OFF COIL
HVAC EVAPORATOR COIL
RELOCATE DEHUMIDISTAT
TO LIVING SPACE
AIR FILTER ACCESS DOOR
CONDENSATE PAN
AND FLOAT SWITCH
FIGURE 7 – Attic Installation
90-1423
DEHUMIDIFIED AIR IS SUPPLIED
DOWNSTREAM
FROM A-COIL TO
MINIMIZE EVAPORATION OFF A-COIL
115 VAC
CIRCUIT
A-COIL
SUPPLY DUCT
HVAC / FURNACE
CONDENSATE HOSE
ON DEHUMIDIFIER
(TO COMMON DRAIN
OR OUTSIDE)
DEHUMIDIFIER
NOTE:
DEHUMIDIFIER
DRAWS AIR FROM
LIVING SPACE THROUGH
RETURN GRILL
FIGURE 6 – Equipment Room/Closet Installation
90-1423
Note 1:
Attic installations require the following.
1. The dehumidistat must be removed from the
unit and relocated in the living space. An
insulated cover plate is provided to cover the
dehumidistat opening.
2. The dehumidifier must be installed in the
supplied condensate pan with a field supplied
float switch.
Note 2:
Vibration isolators placed under the
dehumidifier feet are recommended when the
dehumidifier is installed on ceiling joists.
CAUTION
Ensure return grill in door is not obstructed so dehumidifier
does not pull from HVAC system.
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