Installation Manual

DUCTING
IO-DV090 IO-DV090
WWW.CLEANCOMFORT.COM
9
It is recommended that a new, separate return duct be
installed for the DV090 from a central area of the house.
If this is not possible, and if the exisng system has
mulple returns, select one to disconnect from the
exisng forced air system and use it for the dedicated
DV090 return. Always select a return from a central
locaon in the home in an area that is always open to
the rest of the home. Do not use a return from a room
that may have its door closed much of the me. If the
home in which the DV090 is to be installed has an
exisng forced air HVAC system, ulize the HVAC
system to make the DV090 installaon easier.
Basement Installation: Install a separate 10" return
to the DV090 in a central area of the home. Oponal:
Duct the supply from the DV090 to a 10" x 10" x 10"
tee/damper, adjusted to 20% open to the basement.
This allows the ability to discharge a variable amount of
dehumidied air into a basement that may not be well
served by the exisng duct system, especially during the
summer months. Duct the other side of the tee to the air
supply of the exisng HVAC system. A backdra damper
is required in the duct between the 10" tee and the
central supply duct to prevent air from being discharged
into the basement during central fan operaon. Connect
a duct from outside to the 6" collar of the DV090 if you
wish to provide venlaon air. See Figure 4.
Fresh Air Ventilation
Venlaon controls determine the me/frequency that
the unit introduces outside air into the structure.
The amount/frequency of venlaon should be based
on the size and occupancy of the residence. If you are
unsure of your venlaon air requirements or have need
for higher air ows, consult Technical Support by calling
1-855-239-2665.
Figure 5: Ac Installaon
Installation in a Basement or Crawlspace
with an Existing Forced Air HVAC System.
Crawlspace Installation: Install a separate return to
the DV090 in a central area of the home. Oponal: Duct
the supply from the DV090 to a 10" x 10" x 10" tee/damper
that is 20% open to the crawlspace if desired. Duct the
other side of the tee to the air supply of the exisng HVAC
system with a backdra damper. Connect an Insulated
duct from outside to the 6" collar of the DV090 if you wish
to provide oponal venlaon air. See Figure 4.
Installation in an Attic with an Existing Forced
Air HVAC System
I
CAUTION!
ALWAYS install a catch pan with a drain or Safety Float
Switch for condensate under the DV090 in an ac
or condensate may damage the living space below.
The Safety Float Switch should be installed in series with
the eld wire that connects the blue (#5) lead from the
DV090 to the blue (#5) lead on the digital control. If over-
ow occurs, this Safety Float Switch opens the compressor
control circuit and stops water producon before the
catch pan overows. The DV090 will connue to venlate
or circulate air as normal, but will not dehumidify unl this
switch closes.
The preferred method of installaon is to create a separate
return for the DV090 in a central area of the structure. Duct
the supply of the DV090 to the air supply of the exisng
HVAC system. Connect an insulated duct from outside to
the 6" collar of the DV090 if you wish to provide fresh make-
up air. Adjust a damper in the duct to provide the desired air
ow. Using the digital control, program the unit to bring in
the desired amount of fresh air. See Figure 5.
Figure 4: Basement or crawlspace installaon.