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12821-6-0406
DRB-1 For Vented Room Heaters
Models
RH-25-(1, 2, 4, 5, 6) and RH-35-(1, 2, 4, 5, 6)
Direct Vent Wall Furnaces DV-25-(1, 2)SG and DV-35-(1, 2)SG
Installing Optional DRB-1 Blower
1. For RH-25-(1, 2, 4, 5, 6) and RH-35-(1, 2, 4, 5, 6), remove
casing front.
1. For DV-25-(1, 2)SG and DV-35-(1, 2)SG, remove casing
front and heat shield.
2. When facing appliance, insert blower assembly into the left
section of the casing (adjacent to the combustion chamber).
3. For RH-25-(1, 2, 4, 5, 6) and RH-35-(1, 2, 4, 5, 6), route cord
set through opening in casing back. The opening in casing
back is located adjacent to gas control.
3. For DV-25-(1, 2)SG and DV-35-(1, 2)SG, route cord set
through opening in casing bottom. The opening in casing
bottom is located beneath gas control.
4. Align the (2) screw holes on the inner side panel and the (2)
screw holes on casing back with the (4) clearance holes on
the blower assembly. Attach blower assembly to the casing
back and inner side panel with (4) #10 x 1/2" (13mm) screws
provided. The blower assembly must be attached first to the
casing back and then to the casing side panel.
5. For RH-25-(1, 2, 4, 5, 6) and RH-35-(1, 2, 4, 5, 6), replace
casing front.
5. For DV-25-(1, 2)SG and DV-35-(1, 2)SG, replace heat shield
and casing front.
Attention: Wiring harness on blower is factory assembled and
installed. If wiring harness becomes disassembled use the follow-
ing steps to reassemble the wiring harness.
1. Attach (1) pin terminal from black (hot) wire, smooth insulation
on cord set to (1) socket terminal on fan control assembly.
2. Attach (1) pin terminal from black (neutral) wire, ribbed insu
-
lation on cord set to (1) socket terminal from white (neutral)
wire on motor.
3. Attach (1) pin terminal on fan control assembly to (1) socket
terminal from black (hot) wire on motor.
4. Attach green ground wire beneath one of the #10 x 1/2" (13mm)
screws on the blower housing.
Fan Control
The automatic fan control is located in the switch box. The switch
box is attached to the front of the blower assembly. The switch
box is adjacent to the combustion chamber. The fan control is a
non-adjustable automatic type. The fan control will require between
5 and 10 minutes of main burner operation before the fan control
“closes” and activates the blower. The blower will continue to run
between 5 and 10 minutes after the main burner shuts off, before
the fan control “opens” and deactivates the blower.
Wiring
The appliance, when installed, must be electrically grounded in
accordance with local codes or, in the absence of local codes, with
the National Electrical Code, ANSI/NFPA 70 or Canadian Electrical
OPTIONAL BLOWER INSTALLATION INSTRUCTIONS
COMBUSTION
CHAMBER
SWITCH BOX
BLOWER ASSEMBL
Y