Service manual

COMBAT
®
UH UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL
14
Figure 8: Separated Combustion Heater - Vertical and Horizontal Vent Termination
Figure 9: Concentric Vent Box
Vent
Termination
Listed Thimble
through
Combustible
Wall
4" Dia.
Vent
12" (31 cm)
Minimum from wall
to vent termination.
4" Dia.
Air Intake
Condensate
Trap to Drain
(Optional)
12" (31 cm)
Minimum from air inlet to vent
termination (may be horizontal
or vertical clearance).
Air Intake
Termination
Note: Vent supports not shown
4" Dia. Vent
4" Dia.
Air Intake
12" (31 cm)
Minimum from air inlet to vent
termination (may be horizontal
or vertical clearance).
Vertical
Option
Horizontal
Option
Model Vent Diameter Part Number
UHA 30 - 125 4" (10 cm) 90502102
4" (10 cm) Single
Wall Vent Pipe
(By Others)
Seal joint between single wall
and Type B vent with silicone sealant.
Use 3 sheetmetal
screws equally
spaced around joint.
Use 3 sheetmetal
screws equally
spaced around collar.
Concentric
Vent Box
6" (15 cm) Single
Wall Inlet Air Pipe
(By Others)
One Piece Double Wall
Type B-1
Vent
Pipe (By Others)
Toward
Heater
Toward
Outside