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SPECIFICATIONS AND DIMENSIONS
B
T
U
H
(
H
e
t a
r e
n I
p
t u
C
a
b
M
o
d
l e
0 (
0
) 0
W
R
1
8
5
B
1
8
1
1
8
1 -
R
2
6
5
B
2
6
4
2
2
3 -
R
3
3
5
B
3
3
4
2
5
3 -
R
4
0
5
B
3
9
9
2
9
1 -
*Designation for Propane is "EP", Natural gas is "EN". Prefix "C" is for Cast Iron (ASME) Headers; "P" is for Plastic (Polymer)
Headers. Atmospheric heaters: reduce input 4% for each 1000 ft. above sea level when installed above 2000 ft. elevation.
Low NOx heaters: for elevations above 5,000 feet consult factory. For Canada, no de-rate is required for elevations up to
4500 feet. Manufactured under Patent No. 3,623,458. Note: Plastic (Polymer) Headers cannot be used for ASME
installations.
COMBUSTION AIR (Indoor Units Only)
Air For Combustion And Ventilation
The heater must have both combustion and ventilation air.
Minimum requirements for net free air supply openings,
one 12 inches from ceiling for ventilation and one 12
inches from the floor for combustion air as outlined in the
latest edition of the National Fuel Gas Code, ANSI
Z2231(Canada-CAN/CGA-B149.1 and B149.2) and any
local codes that may have jurisdiction.
CAUTION: Combustion air must not be contaminated
by corrosive chemical fumes which can damage the
heater and void the warranty.
) A
(
) B
(
) C
n i
t e
F
u l
e
n I
d
o
r o
d i
h t
i D
. a
D
r
f a
h t
o
o
d
4 /
"
6
"
6
2
5 -
8 /
"
8 /
"
7
"
6
2
7 -
8 /
"
4 /
"
8
"
6
3
3 -
4 /
"
4 /
"
9
"
6
5
3 -
8 /
"
(
) J
G
s a
W
t a
C
o
n
. n
C
o
n
1
2
1 -
1 /
6
"
3
4 /
"
2
"
1
1
1 -
8 /
"
3
4 /
"
2
"
1
0
3 -
4 /
"
3
4 /
"
2
"
1
2
1 -
2 /
"
3
4 /
"
2
"
Fig # 9037.2
*Electrical Connection On Left Side is 19-1/8".
a. All Air From Inside The Building:
Each opening shall have a minimum net free square
inches as noted:
Model Square Inches Model Square Inches
185
181
265
264
b. All Air From Outdoors:
When air is supplied directly from outside of building,
each opening shall have a minimum net free square
inches as noted:
Model
185
265
335
405
16
S
h
p i
p
n i
g
W
e
g i
h
s t
C
s a
I t
o r
n
C
a
p
o r
n
H
e
t a
r e
H
e
t a
r e
r e
w
S /
a t
k c
e l
s s
w
S /
a t
k c
e l
. n
T
o
p
T
o
p
1
9
1
1
7
2
2
1
4
1
9
5
2
3
4
2
1
5
2
5
3
2
3
4
335
333
405
399
Square Inches
46
66
84
100
(
b l
) s
I
n
d
o
r o
s s
D
r
f a
- t
h
o
o
d
1
2
1
5
1
7
2
0
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