Electrical Connection - Fantech DBF 4XL Installation And Operation Manual

Tubing
1/2" Mark on Tubing
Duct Wall
Alternate Installations for Increased Switch Sensitivity in areas of Higher Elevation
Grommet
and Tubing
90 Degree
Elbow
Pressure Tap - Located
upstream of an elbow
"Pressure Tap" Located at Elbow

Electrical Connection

Do not connect power supply until fan is completely installed. DBF4XL is
provided with a 120VAC power cord.
1. This unit has rotating parts and safety precautions should be exercised
during installation, operation and maintenance.
2. CAUTION: "For General Ventilation Use Only. Do Not Use To Exhaust
Hazardous Or Explosive Materials And Vapors."
3. WARNING: To reduce the risk of fire, electric shock or injury to resons-
observe the following:
• Use this unit only in the manner intended by the manufacturer. If you
have questions, contact the factory.
• Before servicing or cleaning, unplug power cord or switch power off
at service panel and lock service panel to prevent fan from being
switched on accidentally.
• When the service disconnecting means cannot be locked, securely
fasten a prominent warning device, such as a tag, to the service
panel.
• Installation work and electrical wiring must be done by qualified
Sensitivity Adjustment Instructions
Grommet
1/4" Max.
Plane of Rotation
Diaphragm Inverted
1-o-clock
3-o-clock
5-o-clock
Installing Grommet and Tubing
First, drill a 5/16 inch to 3/8 inch diameter hole in the duct wall.
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 switch. It
may be necessary to use a lubricant in order to slide the tubing over the
entire nipple. 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
grommet up to the mark as illustrated. Do not use a lubricant on this
end of the tubing.
In order to increase the switch sensitivity for installations in regions of
higher elevation, it may be necessary to rotate the diaphragm as
illustrated. The diaphragm should be located below the horizontal axis.
Please note that due to gravity, the switch may not release when the
diaphragm is fully inverted. The diaphragm should be rotated in
increments and cycled to be certain that the switch will release thereby
breaking power to the fan. An alternate approach may be to insert the
"pressure tap" in the upstream side of an elbow. Additional tubing may
be required. In the event that additional tubing is required, be certain
that the tubing connections at the duct wall and the switch are as air-
tight as possible by sealing with a caulking material.
person(s) in accordance with all applicable codes and standards,
including fire-rated construction.
• The combustion airflow needed for safe operation of fuel burning
equipment may be affected by this unit's operation. Follow the heating
equipment manufacturer's guidelines and safety standards such as
those published by the National Fire Protection Association (NFPA),
the American Society of Heating, Refrigeration, and Air Conditioning
Engineers (ASHRAE) and the local code authorities.
• When cutting or drilling into wall or ceiling, do not damage electrical
wires or other hidden utilities.
• Ducted fans must always be vented to the outdoors.
4. WARNING! Check voltage at the fan to see if it corresponds to the
motor nameplate.
GUARDS MUST BE INSTALLED WHEN FAN IS WITHIN REACH OF PERSONNEL
OR WITHIN EIGHT (8) FEET OR 2.4 METERS OF WORKING LEVEL OR WHEN
DEEMED ADVISABLE FOR SAFETY.
a. Disconnect power to the booster fan.
b. Looking from the inlet (dryer side), the switch should be at the
3-o-clock position.
c. Remove the mounting screws from the fan mounting bracket, and dis-
connect the fan from the duct connections.
d. Rotate the fan and switch to the 1-o-clock position for less sensitivity
or 5-o-clock position for more sensitivity then secure the fan in the
duct. While the fan is secure apply power and check the operations.
e. After checking operation, disconnect power.
f. Connect the fan to the mounting bracket.
g. Apply power to the fan and check for operation.
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