Fantech DBF110 - Manual (Page 4)

Wiring Procedure
Please Note: The fan motor, capacitor and pressure switch connec-
tions are pre-wired from the factory.
Step 1.
Remove the screws securing the terminal box cover plate located on
the side of the fan. All fan motor connections are prewired to an elec-
trical terminal strip. A ³ ₈" romex type cable restraint connector will
be needed to secure the wiring through the knockout provided on the
side of the terminal box.
Step 2.
Bring incoming electrical service through the romex connector and
the fan knockout. Be sure to place the connector nut over the wiring
coming into the terminal box. There are three open ports on the ter-
minal strip. Using a small regular screwdriver, tighten the Neutral
(White) wire of the incoming supply under the open terminal labeled
"N". Tighten the Line (Black) wire of the incoming supply under the
open terminal labeled "L". Tighten the Ground (Green) wire of the
incoming supply under the open terminal marked " ". For reference,
a wiring diagram is included on the inside of the terminal box lid.
Step 3.
Secure the romex connector. Secure the incoming supply with the
romex connector. Replace the fan terminal box cover.
N
L
Illustration 5
DBF110 Wiring – Fan and Pressure Switch
Warranty and Maintenance
Important Notice: Prior to performing Steps 1 - 4, be certain that the
electrical supply to the fan/switch is turned off.
If fan fails to start when the dryer cycle begins, please follow the pro-
cedure listed below:
1. Check the incoming supply for proper voltage.
2. Consult schematic shown above (also included on inside of fan
wiring terminal lid) to ensure proper connection.
3. If possible, use a meter to test for continuity across the fan
motor leads. In order to do this, the capacitor and pressure
switch must be disconnected (do not test the capacitor - it will
not meter continuity). If motor leads show continuity, rewire the
fan, capacitor and pressure switch.
4. Turn on the electrical supply and restart the dryer cycle. Check to
be certain that fan starts.
If fan still fails to start after performing Steps 1 – 4, continue follow-
ing the procedure as listed below:
5. Verify that the pressure switch diaphragm is vertical as shown in
Illustration 2 of these instructions. If the diaphragm is not verti-
cal, reposition the pressure switch and check for fan operation
against another dryer cycle.
6. Verify that the tubing is not crimped and that the tubing connec-
tor nipples are not obstructed.
7. If switch diaphragm is vertical and fan still fails to start, with the
electrical supply on:
a. Remove the tubing from the nipple on the fan and blow
gently into the tubing;
b. If fan starts, consult Fantech for additional technical sup-
port.
8. If fan fails to start after blowing into the tubing:
a. Disconnect incoming power supply at the source.
b. Remove the pressure switch leads from the wiring terminal
block
c. Connect the incoming power supply directly to the fan
motor as shown in "FR110 Wiring" diagram below.
d. Turn on power to fan.
9. If fan fails to start, please consult Fantech for additional techni-
cal support.
Recommended Maintenance
1. Since fan bearings are sealed and provided with an internal lubri-
cating material, no additional lubrication is necessary.
2. Fan impeller may accumulate lint. Periodic inspection, based upon
dryer usage, should be performed to ensure that the fan impeller
is not obstructed or loaded with lint. Under normal conditions, fan
should be inspected a minimum of every Six (6) Months. Note:
Excessive booster fan noise or vibration may be an indication of
lint buildup on the impeller. To inspect and clean the impeller:
a. Disconnect the incoming power supply at the source.
b. Remove the duct from the fan inlet and remove any lint
buildup on the impeller.
c. Reconnect the duct to the fan. Turn power supply on.
Troubleshooting
Blue
Brown
Power
to Fan
Red
White
Black
Green
Terminal block in
fan wiring box
Neutral
115V Line (Supply) Electrical supply, 115V
Ground
Capacitor
Motor
Leads
Brown (Z2)
Blue (U2)
Black (TK)
Capacitor
Neutral side of
115V supply
Line side of
115V supply
Fan Only Wiring (Reference for Troubleshooting Step 8c)
Black