R-4973
Page 11
INSTALLING OPTIONAL BLOWER SRB-18T OR SRB-30T
If heater is installed onto the wall, in order to install the optional
blower, the heater must be removed from the wall. If heater is
installed on SRS-18 or SRS-30 optional floor stand there is
adequate access area available to install the optional blower.
1. Turn "OFF" gas supply to the heater.
2. Remove lower louver from casing assembly (2 screws).
3. Remove reflector from casing assembly (2 screws).
4. Remove upper louver from casing assembly (2 screws).
5. Insert the fan control wires and the upper portion of the fan
control through the 3/4" (19mm) diameter hole on the bottom
side of the top heat shield. The fan control wires will enter into
the top portion of the heater and the fan control disc will be
facing the main burner. Attach fan control to the bottom side
of the top heat shield with (2) screws provided with the
optional blower.
6. Route cord set through 9/16" (14mm) diameter hole on casing
assembly back. Insert approximately 3" (76mm) of cord set
into casing assembly back.
7. When you are facing the front of the heater, position the
optional blower assembly onto the top heat shield of the
heater. The motor wire harness should be facing into the top,
right portion of the heater.
8. Attach (1) pin terminal from black (hot) wire, smooth insula-
tion on cord set to (1) socket terminal on fan control wire
harness.
9. Attach (1) pin terminal from black (neutral) wire, ribbed
insulation on cord set to (1) socket terminal from white
(neutral) wire on motor wire harness.
10. Attach (1) pin terminal on fan control wire harness to (1)
socket terminal from black (hot) wire on motor wire harness.
11. Attach the green ground wire from the motor wire harness and
the green ground wire from the cord set to the bottom right side
of the blower housing with (1) screw provided with the
optional blower.
12. With the heater standing upright, position the air discharge
opening of the blower housing downward. Place the bottom
flange of the blower housing over the top edge of the top heat
shield. Insert the blower housing into the top portion of the
heater by pivoting the blower housing upward 90
°
. Attach the
blower housing to the casing assembly with (4) screws provided
with the optional blower.
13. Grasp cord set at casing assembly back and pull excess cord set
through casing assembly back. Secure cord set in casing
assembly back with the strain relief provided with the optional
blower.
14. Installation of optional blower SRB-18T or SRB-30T is
completed.
15. If heater was removed from the wall, in order to install SRB-
18T or SRB-30T optional blower, check for gas leaks at all gas
connections before lower louver is replaced onto casing
assembly.
Attention! After optional blower has been installed use the following
steps to properly align the upper louver and the reflector with the heat
shield.
A. When replacing upper louver, be sure the bottom lip of upper
louver goes behind the heat shield.
B. When replacing reflector, be sure the top lip of reflector goes in
front of the heat shield.
Excessive Blower Wheel Noise
ATTENTION! If your blower assembly develops a squeal, hum or
grinding noise, it indicates dirt or debris on shaft of blower wheel. Use
the following steps to clean shaft of blower wheel.
1. Remove red rubber grommet with brass bushing or black rubber
grommet with brass bushing from end of blower wheel shaft
opposite motor.
2. Clean blower wheel shaft with cotton cloth.
3. Place 1 or 2 drops of all purpose oil on END of blower wheel shaft.
4. Replace red rubber grommet with brass bushing or black rubber
grommet with brass bushing onto end of blower wheel shaft.
Attention: The red rubber grommet with brass bushing or the
black rubber grommet with brass bushing must "snap-back" into
position.
5. Cleaning of blower wheel shaft is completed.
OPTIONAL
UNVENTED
BLOWER
ROOM HEATER
SRB-18T
BF-(10, 20)
SRB-30T
BF-30
HEAT SHIELD
