Dryer Booster Installation and Operation Manual

4
Increased
Sensitivity
Decreased
Sensitivity
Neutral
Position
Switch
Diaphragm
Plane
Switch mounted
properly above
duct.
Switch mounted
properly
above and
below duct
Horizontal Vertical
Angled
Switch mounted
properly above
duct.
Switch mounted
properly
above and
below duct
Horizontal Vertical
Angled
Attach Mounting Bracket to
stud using screws provided.
Attach Fan to Mounting
Bracket using screws provided.
Illustration 2
Correct Mounting of Diaphragm Switch
Horizontal Vertical Angled
Illustration 3
Incorrect Mounting of Diaphragm Switch
Fan Installation
Step 1. Selecting Fan Location
Fan must be mounted a minimum of 5 feet from the dryer outlet.
In order to perform recommended maintenance, fan location should allow
sufficient access for service. Refer to dimensional drawings shown above.
Step 2. Mount Bracket
Using the wood screws provided, attach the mounting bracket to a support
beam at the selected location. For the DBF110 only, the bracket is pro-
vided with grommets in order to isolate any vibration and prevent the
transmission of sound through the structure. Be careful not to overtighten.
Fan mounting can be in any angle (see ill. 2), however, vertical mounting is
recommended to reduce condensation buildup in the fan. If a horizontal
installation is necessary and condensation buildup may pose a problem, a
¼" hole drilled in the bottom of the housing (along with an NPT insert [by
others] and drain tubing) may be installed to allow condensation to drain.
Step 3. Mount Fan
For proper operation, the switch diaphragm must be positioned vertically.
(See ill. 2 and ill. 4) If an increased or decreased sensitivity is required,
such as in high altitude applications, the unit can be rotated (see ill. 4) to
increase or decrease the sensitivity of the pressure switch. Wiring box
should be positioned for easy access. Attach fan to the mounting bracket
with the self tapping screws provided. Care should be taken not to strip
the housing. Although screw pilot holes are not required,
3
/
32
" (or
smaller) pilot holes are recommended.
Steps 2 & 3 may be reversed.
Step 4. Installing Grommet and tubing
First, drill a 5/16 inch to 3/8 inch diameter hole in the duct wall on the
intake side of the fan. Carefully insert the grommet into the hole. (Drilling
a metal duct may produce burrs. Be careful not to be cut or pricked by
the burrs or the duct.) Next, force one end of the tubing over the nipple
on the control. Make a mark a distance of 1/2 inch from the other end of
the tubing. Slide this end of the tubing through the center of the grom-
met up to the mark as illustrated.
1/4" Max.
Duct Wall
Grommet
Tubing
1/2" Mark on Tubing
Illustration 4