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Mfg No. 164771, Page 5
2 (51mm)
2 (51mm)
6 (152mm)
H
F
E
G
D
C
B
Figure 2 - Attach Combustion Air Pipe
1) Remove door panel.
2) Cut out the hole.
3) Slide pipe down through hole.
4) If collar is oval, form pipe to fit. Attach pipe to collar with
sheetmetal screws and seal the connection.
Collar for
connecting
combustion air
pipe
Use tin snips
to cut out
hole for
combustion
air pipe
Venter
Outlet
3. Concentric Adapter
If installed as a separated-combustion unit, a concentric adapter
is required.
• Option CC2 and CC6 - The concentric adapter is a
metal box that attaches to the inside of the building. See
the illustrations and dimenstions in Figures 3A and 3B.
Option CC6 is horizontal; Option CC2 is vertical. (Op-
tion kits also include a vent terminal and combustion air
inlet or guard.)
Figure 3A - Concentric Adapter Assembly in Options CC2 and CC6
Figure 3B - Concentric Adapter Box
Dimensions - inches (mm)
CAUA 150,200 250,300,350,400
A 5 (127) 6 (152)
B 4 (102) 5 (127)
C 4 (102) 4 (102)
D 7-1/2 (191) 7-1/2
E 5 (127) 5 (127)
F 4 (102) 5 (127)
G 16-1/2 (419) 16-1/2 (419)
H 8 (203) 10 (254)
J 6 (152) 8 (203)
7A. Venting and Combustion Air Requirements for Separated-Combustion
Installation (must use either Option CC2 or CC6)
Specific Requirements (read all before installing)
Comply with the specific requirements and instructions in the following paragraphs and illustrations.
1. Combustion Air Inlet
Diameter is 5" for Sizes 150 and 200 and 6" for Sizes 250, 300,
350, and 400.
Use tin snips or aviation shears to cut out the hole in the top of
the heater (See Figure 2). Insert the pipe through the hole and
attach it to the collar inside the heater. Seal the joint. (Larger size
heaters have oval collars. If the collar is oval, form the pipe to fit
the collar.)
2. Venter Outlet
The venter outlet size is 5" for Sizes 150, 200, and 250 and 6" for
Sizes 300, 350, and 400. A minimum length of 12" of straight
pipe is required at the venter outlet.
Side View - Side of the
Adapter Box that Connects
to the Heater
End View
Field-supplied vent
pipe passes
through the
rubber seal on the
concentric adapter
box, extending out
both sides of the
box
A = Diameter of the
Collar for attaching
the inside
Combustion Air Pipe
from the Heater
Top View of the Concentric Adapter
Box Showing Air Flow
= Combustion Air Flow
= Exhaust (Vent) Gas Flow
J = Diameter of the
Collar for attaching the
"Outside" Portion of the
Combustion Air Pipe
View of Heater Connection Side View of Vent Terminal Connection Side
Collar for outside portion of the
combustion air pipe (vent pipe
extends through the box
internally concentric to the
outside portion of the combustion
air pipe)
Collar for
connecting
indoor portion
of the
combustion
air pipe
Install rubber seal
for vent pipe