Instructions / Assembly

15
Maximum Vent Length Adjustment Dip switches
Number of
pieces**
Number of
pieces**
Short length using 3" (75mm) pipe
Short length using 2" (50mm)pipe
Long length using 2" (50mm)pipe
Long length using 3" (75mm) pipe
** Table assumes straight vent pieces are 3’ (0.9m) each.
Shorter or longer vent pieces may also be used up to
the maximum allowed vent length.
** Table assumes straight vent pieces are 3’ (0.9m) each.
Shorter or longer vent pieces may also be used up to
the maximum allowed vent length.
Vent length condition
࠙
Dip Switch Adjustment
ࠚ
Dip switches
1
#7 #8
ON=OFF=
2
3
4
2” Pipe 3” Pipe
* Not including the termination.
* Not including the termination.
• Do not change any other dip switches.
• Please refer to page 28 for the location of the dip switch bank.
[Vent length example]
Using 2"(50mm) pipe, Vent length = 42 ft. (12.6m) and Two 90° elbows
→Set at "② long length using 2" (50mm) pipe" condition.
3 0.9 1
6 1.8 2
9 2.7 3
12 3.6 4
15 4.5 5
18 5.4 6
21 6.3 7
24 7.2 8
27 8.1 9
30 9.0 10
33 9.9 11
36 10.8 12
39 11.7 13
42 12.6 14
45 13.5 15
48 14.4 16
51 15.3 17
54 16.2 18
57 17.1 19
60 18.0 20
6
Vent length* Elbows
ft m0 45123
30.9 1
61.8 2
92.7 3
12 3.64
15 4.55
18 5.46
21 6.37
24 7.28
27 8.19
30 9.010
33 9.911
36 10.8 12
39 11.7 13
42 12.614
45 13.515
48 14.416
51 15.317
54 16.218
57 17.119
60 18.020
63 18.921
66 19.822
69 20.723
72 21.624
75 22.525
78 23.426
81 24.327
84 25.228
87 26.129
90 27.030
93 27.931
96 28.832
99 29.733
100 30.034
Vent length* Elbows
ft m0 5
678
1234
1
2
3
4
<Maximum Vent Length Congurations>
The unit can be adjusted to accommodate longer vent runs; refer to the below table to nd the
maximum vent length based on the number of elbows. Adjust the dip switches according to the vent
condition noted in the tables below.
Note: By default, the unit has been set to the " 1 short length using 2" (50mm) pipe" condition. When adjusting
the dip switches for longer vent runs, the BTUH input of the appliance will be reduced by up to 9%.
• Disconnect power to the water heater before changing the dip switches. Failure to perform
this step will result in a "73" code displayed on the remote controller and a cease in operation .
If this occurs, disconnect, then reconnect power to the water heater to reset the system.
The power must be unplugged when adjusting the dip switches to switch
the airow amount.