Dimensional Data - Fantech DBF 4XL Installation And Operation Manual

4
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
recommended maintenance, fan location should allow sufficient access for service. Refer to
dimensional drawings shown below.
Step 2. Mount Bracket
Using the 3/4" long wood screws provided, attach the mounting bracket to a support beam at the
selected location. Fan mounting can be in any angle, 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 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 positioned for easy access. Attach fan to the mounting bracket with the 1/2" long 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.
3 7 / "
8
NOTE: Steps 2 & 3 may be reversed.
2"
3 / "
7

Dimensional Data

8
3 7 / "
8
2"
3 7 / "
8
Dimensions in inches.
Pressure Switch Positioning
Horizontal Duct
Correct Control Positioning
Incorrect Control Positioning
fantech
1"
6 / "
15
16
3 3 / "
4
1"
2"
1"
3"
6 15 / "
16
1"
3 / "
3
4
Correct Switch Positioning - Diaphragm Positioned Vertically
Correct Control
Positioning
9 3 / "
4
9 / "
3
4
2"
Angled Duct
Incorrect Control
Positioning
Mount Bracket
(use 1/2" long wood screws)
Mount Fan
(use 1/2" long self tapping screws)
Mounting Bracket & Screw Locations
(using the wrong length screws will
damage the fan impeller)
Vertical Duct
Control Correct
in all Positions