Dimensional Data; Fan Installation - Fantech DBF110 Instructions D'installation

DBF110 DRYER EXHAUST BOOSTER SYSTEM INSTALLATION INSTRUCTIONS
DBF110 Includes:
1 DBF 110 Dryer Booster Fan
1 Fan Mounting Bracket and Hardware
1 Small Wall Sign Indicating Proper Operating Procedure
Important Notice
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Dimensional Data

4"
9¹ ₂"
11¹ ₄"
4"
9¹ ₂"
12¹ ₂"
(DBF110)
Illustration 1
DBF110
Alternative Location
Secondary Lint Trap
Installation Guidelines
Important notice! To prevent the possibility of dryer fan exhausting
excess heat required for the drying cycle and compromising drying
times, booster fan airflow must not exceed the dryer fan capacity.
Please note: DBF 110 fans are not explosion proof. Do not use the
fans if a potentially explosive situation may exist.
Fan and Switch Mounting
The recommended location of the booster fan is a minimum of 15 lin-
ear (not equivalent) feet of duct from the dryer outlet. If the fan is
mounted closer than the recommended 15 feet, it may develop
enough pressure to lift wet lint into the fan impeller resulting in exces-
sive lint loading in the fan. The best location for the fan to be mounted
is as close as possible to the termination of the duct work.
(Exception: If a secondary lint filter is installed between the dryer and
the booster fan, the booster fan may be mounted within the minimum
distance otherwise recommended (See illustration to left). An NB
mounting bracket attached to a rafter or joist should be used to stabi-
lize the fan. Although not recommended, a vertical rigid duct may sup-
port the fan if the duct is securely stabilized. (Consult local codes
prior to supporting the fan in the duct alone.) Duct work should be
attached to the inlet and outlet of the fan by means of FC vibration
isolation clamps (not included) or duct tape. The duct connection
should be properly sealed to prevent leakage and loss of fan perform-
ance. Flex duct connections between the dryer duct connection and
exhaust duct should be stretched as smooth
as possible.
Pressure Sensor Switch Operation
Fantech's DBF110 is equipped with Fantech's Patented DB10 pressure
switch. The DB10 is a positive pressure sensing switch which
recognizes dryer operation and activates the booster fan 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/temperature sensing systems.
The electricity to the booster fan is connected in a series through a
normally open terminal on the switch. A pressure tap is connected to
a fitting 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 booster fan. An integral delay-on-break timer
in the switch will cycle the fan on for intervals of 10 minutes. This will
continue until the dryer has stopped and the timer delay period has
lapsed. Drying cycles, the booster fan, the delay timer and the pres-
sure switch are not adversely affected by the starting/stopping inter-
vals.

Fan Installation

Step 1. Selecting Fan Location
Fan must be mounted a minimum of 15 feet from the dryer outlet.
If the fan is mounted closer than the recommended 15 feet, it may
develop enough pressure to lift wet lint into the fan impeller resulting
in excessive lint loading in the fan. (Exception: If a secondary lint filter
is installed between the dryer and the booster fan, the booster fan
may be mounted within the minimum distance otherwise recom-
mended (See illustration to left). The best location for the fan to be
mounted, in any application, is as close as possible to the termination
of the duct work. In order to perform recommended maintenance, fan
location should allow sufficient access for service. Refer to dimen-
sional drawings shown above.