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Installation Guidelines
TO PREVENT THE POSSIBILITY OF DRYER FAN CAVITATION AND/OR EXHAUSTING EXCESS HEAT REQUIRED FOR THE DRYING CYCLE AND
COMPROMISING DRYING TIMES, BOOSTER FAN AIRFLOW MUST NOT EXCEED THE DRYER FAN CAPACITY.
Calculating Duct Run
To calculate the length of your planned duct run, measure from the dryer to external venting point in roof or wall. For each bend or elbow add 5-7 feet
to your total duct run calculations. The DEDPV-705 can be used on runs up to 130 feet.
Fan and Switch Mounting
The DEDPV-705 is to be mounted a minimum of 5 linear (not equivalent)
feet from the dryer outlet. Exception: A secondary lint trap can be used
where required and in applications where excessive dryer lint generation
is likely or to increase the time interval between routine maintenance of
the (DEDPV). (See illustration to the right). An MB mounting bracket
(included) attached to a rafter or joist should be used to stabilize the
fan. The duct work to the inlet of the DEDPV-705 is to be attached with
the FC4 clamp (included) to permit periodic inspection of the blower.
Refer to maintenance instructions for inspection recommendations. All
duct connections should be properly sealed to prevent leakage and loss
of fan performance. Flex duct (if allowed by building codes) should be
stretched as smooth as possible.
Indicator Panel
The DEDPV-705 is equipped with a remote mounted low voltage opera-
tion indicator panel. This panel contains an LED that will indicate proper
operation of the (DEDPV). In the event of a problem with the system, it
will indicate the nature of the problem. The panel must be mounted in
the 2 gang decora switch plate with warning label (furnished).
Pressure Sensor Switch
Operation
The DEDPV-705 contains a positive pressure sensing switch which rec-
ognizes dryer operation and activates the (DEDPV) from an independent
electrical circuit. This eliminates connections through the dryer circuit
which may void the manufacturers' warranty as well as manual systems
which require the attention of the operator or costly current/ tempera-
ture sensing systems.
Power to the (DEDPV) is provided through the attached 120VAC power
cord. A pressure tap is connected to a nipple on the side of the switch.
When the dryer begins operation, positive pressure in the duct causes
the switch diaphragm to expand closing the circuit to the (DEDPV).
fantech
Cleanout Access
Duct
DEDPV-705
Cleanout Access
Duct
Lint Trap Optional
FC4 Mounting
Clamp
FC4 Mounting
Clamp