11
Minimum length
Short length
* Do not change any other DIP switch
.
* Not including the 45° adapter included in N-FlexKit3
5
* No 90° elbows
Maximum allowable 45° elbows are 2 elbow.
* Vent length condition
.
7
ON= OFF=
1
2
Long length
Maximum length
3
4
1
2
3
4
8
78 Vent Length 45
° elbows
5' (1.5m) Vent Length 13' (3.9m) 0 2 pieces
13' (3.9m) Vent Length 23' (6.9m) 0 2 pieces
23' (6.9m)
Vent Length 29' (8.7m) 0 2 pieces
29' (8.7m)
Vent Length 35' (10.5m) 0 2 pieces
The power must be unplugged when
adjusting the DIP switch to switch the
airow amount.
The unit can be adjusted to accommodate longer vent runs; refer to the below table to nd the
maximum vent length. Adjust the DIP switch according to the vent condition noted in the tables below.
Maximum Vent Length Adjustment DIP switch
- Two 45° elbows, maximum length = 18 ft. (5.4m)
(with DIP switch set at "short length" condition)
- Two 45° elbows, maximum length = 30 ft. (9.0m)
(with DIP switch set at "Maximum length" condition)
[Maximum Vent Length Example]
• Disconnect power to the water heater before changing the DIP switch. Failure to perform
this step
will result in a "733" code displayed on the Display Window and a cease in operation
.
If this occurs, disconnect, then reconnect power to the water heater to reset the system.
<Maximum Vent Length Congurations>
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