14
Page
-Vent length and No. of Elbows-
This is a Category III appliance and must be vented accordingly. For best results, a vent system should be
as short and straight as possible.
•
This water heater is a Category III appliance and must be vented accordingly with concentric
vent approved for use with Category III or Special BH type gas vent.
•
Follow the vent pipe manufacturer's instructions and the instructions in this manual when
installing the vent pipe.
•
Do not common vent this appliance with any other vented appliance.
(Do not terminate vent
inside a chimney. If the vent must go through the chimney, it must run through the top of the
chimney and terminate with the roof termination listed on page 10. Install per the vent manu-
facturer's instructions.)
•
When the horizontal vent run exceeds 5 ft. (1.5 m), support the vent run at 3 ft. (0.9 m) intervals
with overhead hangers.
•
The maximum length of exhaust vent piping must not exceed 43 ft. (13.1 m) (deducting 5 ft. (1.5
m) for each 87°
elbow used in the venting system). Do not use more than 4 pieces of 87° elbows.
-DIP switch settings for Vent length-
Vent type
Diameter
Max. No. of
87°
Elbows
Max. Vertical and
Horizontal (Total)
Vent Length
Concentric
3 in. / 5 in.
(80 mm / 125 mm)
4
43 ft. (13.1 m )
For each 87° elbow added, deduct 5 ft. (1.5m) from max. vent
length. Two 45° elbows are equivalent to one 87° elbow.
No. of 87°
Elbows
Max. Vertical
or Horizontal Vent Length
0
43 ft. (13.1 m)
1
38 ft. (11.6 m)
2
33 ft. (10.1. m)
3
28 ft. (8.5 m)
4
23 ft. (7.0 m)
Excludes the Concentric termination
0 to 10 ft.
(0 to 3 m)
DEFAULT
11 to 20 ft.
(3.1 to 6.1 m)
21 to 30 ft.
(6.2 to 9.1 m)
31 to 43 ft.
(9.2 to 13.1 m)
110C
and
310C
models
OFF
ON 1 2 3 4 5 6 7 8 9 10
No. 6 : OFF
No. 7 : OFF
No. 8 : ON
OFF
ON 1 2 3 4 5 6 7 8 9 10
No. 6 : ON
No. 7 : OFF
No. 8 : ON
OFF
ON 1 2 3 4 5 6 7 8 9 10
No. 6 : OFF
No. 7 : ON
No. 8 : ON
OFF
ON 1 2 3 4 5 6 7 8 9 10
No. 6 : ON
No. 7 : ON
No. 8 : ON
510C
model
(Upper bank
of DIP
switches)
1 2 3 4 5 6 7 8
OFF
ON
No. 3 : OFF
No. 4 : OFF
No. 5 : ON
OFF
ON 1 2 3 4 5 6 7 8
No. 3 : ON
No. 4 : OFF
No. 5 : ON
OFF
ON 1 2 3 4 5 6 7 8
No. 3 : OFF
No. 4 : ON
No. 5 : ON
OFF
ON 1 2 3 4 5 6 7 8
No. 3 : ON
No. 4 : ON
No. 5 : ON
Installation
Installation Manual
WARNING
•
The black squares indicate the positions of the DIP switches for vent length.
For the 110C and 310C : Only adjust DIP switch No. 6 , No. 7, and No. 8.
For the 510C : Only adjust DIP switch No. 3, No. 4, and No. 5
on the upper bank
.
•
DO NOT adjust the other DIP switches for vent length.
Vent
length
Model
