#2 are not interchangeable and have left hand threads on
one end, this end is indicated by a machined groove.
3.
Remove the 2 piece fan guard assembly (see Figure 14).
4.
Lift the motor assembly off the motor mount.
5.
Before removing the fan, measure and record the location
of the fan hub on the motor shaft (see Figure 15). if
difficult to remove, use a gear puller on the fan hub.
6. To reassemble, place motor assembly onto motor mount
and fasten the fan guard to cabinet.
7. Simultaneously engage and tighten both ends of conduit
#1 into enclosures. Leave a 1/16” to 3/16” (1.6 to 4.8
mm) gap between the motor and fan guard (see Figure
16). Adjust conduit #2 to center the fan in the shroud.
8. To ensure a minimum 5 thread engagement, threaded
ends of conduits must protrude a minimum of 1/16”
(1.6mm) into enclosures. The groove on conduit #2 must
not be more than 7/8” (22mm) from motor coupling (see
Figure 13).
9. Bolt motor to motor mount. Manually spin the fan blade
to ensure fan rotates freely.
10. Air must exit through louvers and fan must rotate
counterclockwise when viewed from rear of heater (see
Figure 13).
P R i n T E D c i R c U i T B O A R D
1. After removing the printed circuit board (P.c. Board)
bracket assembly from the control enclosure, separate
the P.c. Board from the bracket by cutting off the plastic
spacers (see Figure 17).
2. Reinstall a new factory supplied P.c. Board onto the
mounting bracket using new non-conducting spacers of
the same length. Spacers are supplied with a new P.c.
Board. Reinstall the control circuit ground wire to the
printed circuit board bracket (see Figure 8).
c O n T A c T O R
1. Loosen, but do not remove contactor mounting screws.
Slide contactor off mounting screws.
2. Replace with a factory supplied contactor of the same
rating.
T R A n S F O R M E R
1. Replace with a factory supplied transformer of the same
rating.
2. On the new transformer, select primary wires to match
heater voltage. Ensure that the correct transformer
secondary lead is grounded (see Figure 8). individually
terminate all unused wires using closed end connectors.
F U S E
Replace fuse with one of the same type and rating as indicated
on P.c. Board or refer to parts list. An extra fuse should be
stored in the clips marked “SPARE”.
H E A T i n g E L E M E n T S
Heating elements are an integral part of the vacuum charged
core. A factory exchange core can be shipped immediately
from stock. Refer to “core” section for details.
c A B i n E T P A n E L S
Bolt-on cabinet panels are individually replaceable.
- 7 -
FigURE 16
FigURE 15
FigURE 14
FigURE 17
1/16” to 3/16”
(1.6 to 4.8mm)
