Install Instructions

Dimensions in inches.

Diaphragm Correct

in all Positions

Correct Diaphragm

Positioning

Incorrect

Diaphragm

Positioning

Incorrect Diaphragm Positioning

Correct Diaphragm Positioning

Dimensional Data

Correct Switch

Positioning

- Diaphragm Positioned Vertically

Vertical Duct

Angled Duct

Horizontal Duct

essure Switch Positioning

Mount Fan

Mount Bracket

DBF4XL FAN/SWITCH INSTALLATION INSTRUCTIONS

Fan Installation

Step 1. Selecting Fan Location

Fan must be mounted a minimum of 5 linear feet from the dryer outlet. In order to perform recom-

mended maintenance, fan location should allow sufficient access for service. Refer to dimensional draw-

ings shown below.

Step 2. Mount Bracket

Using the wood screws provided, attach the mounting bracket to a support beam at the selected loca-

tion. Fan mounting can be in any angle, however, vertical mounting is recommended to reduce conden-

sation buildup in the fan. If a horizontal installation is necessary and condensation buildup may pose a

problem, a 1/4" hole drilled in the bottom of the housing (along with an NPT insert and drain tubing) may

be installed to allow condensation to drain.

Step 3. Mount Fan

For proper operation, the switch diaphragm should be positioned vertically.

(Illustrations below show

diaphragm position for horizontal, vertical and ducts installed at an angle.) Wiring box should be posi-

tioned 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.

NOTE: Steps 2 & 3 may be reversed.

Mounting Bracket &

Screw Locations