Rapid Engineering CTHN-100 Installation & operation manual - page 67
SECTION 14: O
UTSIDE
C
OMBUSTION
A
IR
S
UPPLY
61 of 91
SECTION 14: OUTSIDE COMBUSTION AIR SUPPLY
IMPORTANT: If the b
u
ilding has a slight negative
press
u
re or corrosive contaminants (s
u
ch as
halogenated hydrocarbons) are present in the air, an
o
u
tside comb
u
stion air s
u
pply to the heater is
req
u
ired. Seal all comb
u
stion air pipe joints.
Use of optional o
u
tside comb
u
stion air is not
recommended
w
ith
u
nvented heaters.
The air s
u
pply d
u
ct may have to be ins
u
lated to
prevent condensation on the o
u
ter s
u
rface. The
o
u
tside air terminal m
u
st not be more than 1' (31 cm)
above the vent terminal.
14.1 Length Re
q
uirements
Follo
w
the constraints listed
.
14.2 Vertical Non-Pressurized Outside Air Supply for Single Heater Installation
14.3 Horizontal Non-Pressurized Outside Air Supply for Single Heater Installation
Description
Part Number
Vent Cap 4" (10 cm)
90502300
Description
Part Number
Vent Cap 4" (10 cm)
90502300
Band Clamp
(Recommended)
Flex Hose
(Recommended)
Vent Cap
W
all
4" (10 cm)
Single Wall Pipe
Burner