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6
DUCTING
IO-DV070 IO-DV070
switch should be installed in series with the 24V or DEHU
terminals to prevent the pump from overowing. If the
24V Terminal wire is in series with the Safety Float Switch
the DV70 and the dehumidier will shut o. If the DEHU
Terminal is in series with the Safety Float Switch the
compressor will turn o but the DV070 will connue to
venlate or circulate air as normal. Contact your local
electrician to install the Safety Float Switch directly to
the dehumidier.
For installaon guidelines, refer to the "Condensate
Pump Installaon" secon at the back of this manual.
Ducting
Installing Duct Collars
The DV070 comes supplied with an 8" round inlet collar
and an 8" round exhaust collar. Follow instrucons
included with these collars.
Ducting for Dehumidication
For the ideal installaon, draw air from the central part
of the home and return it to the isolated areas of the
home like the bedrooms, den, ulity room, or family
room. Be sure to ulize as many of these remote rooms
as possible and not just one locaon. The ductwork of
the exisng HVAC system can be used to supply air to
the home. If the exisng supply goes to isolated areas of
the home, discharge the supply from the DV070 into the
supply duct of the exisng HVAC system. If the exisng
heang system incorporates a central supply, installa-
on of a separate supply duct from the DV070 to each
isolated area is recommended.
Fresh Air / Supply Air
iCAUTION!
DO NOT draw air directly from the kitchen, laundry, or
isolated basement. You may draw air from a basement
that is open to the home. All exible ducng connected
to the DV070 should be UL listed.
A short piece of exible ducng on ALL DV070 duct
connecons is recommended to reduce noise and
vibraon transmied to rigid ductwork in the structure.
Ducng the DV070 requires consideraon of the
following points:
Duct Sizing: For total duct lengths up to 25', use a
minimum 8" diameter round or equivalent rectangular
duct. For longer lengths, use a minimum 10" diameter
or equivalent duct. Grilles or diusers on the duct ends
must not excessively restrict airow.
Isolated Areas: Eecve dehumidicaon may require
that ducng be branched to isolated, stagnant air ow
areas. Use 8" or larger diameter branch ducng to each
of two or three areas, use 6" or larger to each of four or
more areas. Provisions must be made to provide airow
from supply locaons to central return locaon. Proper
air distribuon is important to ensure even humidity
control and heat distribuon throughout the home.
Connecting to Existing HVAC Systems
An oponal 8" gravity backdra damper is available to
prevent reverse air ow through the DV070. If the DV070
is ducted to the supply of an air handler, the backdra
damper should be placed in the DV070 supply duct.
Venlaon operaon is controlled by the digital control
oered with the DV070. These controls determine the
me/frequency that the unit introduces outside air into
the HVAC system. The amount of outside air can be
restricted by the blade damper in the 6" collar. Some
control opons require a 6" motorized damper be
installed in the 6" fresh air duct.
iCAUTION!
Do not connect with a stac pressure greater than or
equal to +.5 WG. Contact Technical Support at
1-855-239-2665 for addional details.
Ducting for Fresh Air (Optional)
Fresh air may be brought into the home by connecng an
insulated duct from outside the home to a tee connected
to the 8" duct that brings the return air from the home
to the DV070. Venlaon is acvated by turning on the
fan switch or acvang the humidity control. Acvate
the venlaon mer on units with the venlang and
humidity control DVP-4034748 to bring in fresh air. Refer
to the Controls secon of this manual for programming
instrucons of the venlaon mer.
Advantages of this form of venlaon include:
1. Outside air is ltered before entering the building.
2. Outside air will be dehumidied before entering
if the DV070 is running in dehumidicaon mode.
3. Drawing air from outside and blowing inside aids in
slightly pressurizing the home. This helps prevent
dirty and humid air from entering the home else-
where. It also reduces the potenal for carcinogenic
radon gas to enter and provides a small amount of
make-up air for atmospheric combuson and exhaust
devices such as a clothes dryer, replace, furnace or
water heater.
4. Exhaust fans are recommended in the bath rooms
and kitchen.
