APPrOVAlS ............................................................................. 3
Precautions .......................................................................... 5
INTrODuCTION ....................................................................... 6
qualifications........................................................................ 6
Controls ................................................................................ 7
High limit Switch.................................................................. 7
Clearances ........................................................................... 9
NSF leg Kit ........................................................................ 10
Hard Water ......................................................................... 10
Power Supply ..................................................................... 12
Contaminated Air................................................................ 14
Air requirements ............................................................... 15
unconfined Space .............................................................. 15
Confined Space.................................................................. 15
Venting ............................................................................... 15
taBle of Contents
Heater Wiring ..................................................................... 22
Gas Piping.......................................................................... 23
Purging ............................................................................... 23
STArT uP ............................................................................... 24
Prior to Start up ................................................................. 24
Initial Start up..................................................................... 24
Checking Venting ............................................................... 25
MAINTeNANCe ..................................................................... 28
Venting System .................................................................. 28
Intake Air Screen ................................................................ 28
Water Heaters .................................................................... 29
SerVICe ................................................................................. 31
TrOubleSHOOTING ............................................................ 33
NOTeS .................................................................................... 50
lIMITeD WArrANTy ............................................................. 51
2