Installation Guide

14 Page
-Vent length and no. of elbows-
 For best results, a vent system should be as short and straight as possible.
 This water heater must be vented with approved concentric venting as described on page 13.
 Follow the vent pipe manufacturer's instructions and the instructions in this manual when install-
ing 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 manufacturer'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-
WARNING
 Adjust the appropriate DIP switches according to model and vent length as
shown below. DO NOT adjust the other DIP switches.
 Turn off the power supply to the water heater before changing the DIP
switch settings.
 Failure to observe these warnings could lead to carbon monoxide poisoning
or death.
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
Installaon
Installaon Manual
110C and 310C:
Only adjust DIP switch No. 6 , No. 7, and No. 8.
510C:
Only adjust DIP switch No. 3, No. 4, and No. 5 on the upper bank.
The black squares indicate the correct DIP switch positions for vent length.
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
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
(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
Vent
length
Model
510C Computer board
Upper bank of
DIP switches