Addison UHAS 150, Installation, Operation & Service Manual

Page: 24 / 74

UHA S
TANDARD
U
NIT
H
EATER
I
NSTALLATION
O
PERATION AND
S
ERVICE
M
ANUAL
16 of 59
Figure 8: Separated Combustion Heater - Vertical and Horizontal Vent Termination
12" (31 cm) Minimum from
air inlet to vent termination.
Vent
Termination
Listed thimble through
combustible wall
Vent**
24" (62 cm)
Minimum from wall
to vent termination.
Air Intake*
Air Intake
Termination
NOTE: Vent supports not shown
Vent**
Air Intake*
24" (62 cm)
Minimum from roof to vent
termination.
Vertical
Option
Horizontal
Option
90°
Bend
Air Intake Termination
12" (31 cm)
Minimum from roof to bottom of air intake.
Listed thimble through
combustible roof
90°
Bend
12" (31 cm)
Minimum from wall to
bottom of air inlet.
12" (31 cm)
Minimum from air intake
to vent termination.
Vent
Termination
Model **Vent Diameter Part Number
UHA[T][X]S 150 - 250 4" (10 cm) 90502102
UHA[X]S 300 - 400 4" (10 cm) 90502102
Model *Air Intake Diameter Part Number
UHA[T][X]S 150 - 250 4" (10 cm) 90502102
UHA[X]S 300 - 400 5" (13 cm) 90502105
Figure 9: Concentric Vent Box
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) or 8" (20 cm)
Single Wall Inlet Air Pipe
(By Others)
One piece of 4" (1
0 cm) diamet
er, 1/4" (6 cm) air
space t
ype
“B” v
ent. Selkir
k Model R
V or equiv
alent.
(By other
s)
Combustion Air
to Heater
Toward
Outside
Exhaust
from Heater
4" (10 cm) or
5" (13 cm)