APPROVALS ............................................................................. 3
Precautions .......................................................................... 5
INTRODUCTION ....................................................................... 6
Qualifications........................................................................ 6
Controls ................................................................................ 6
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
TABLE OF CONTENTS
Venting ............................................................................... 18
Heater Wiring ..................................................................... 23
Gas Piping.......................................................................... 24
Purging ............................................................................... 24
START UP ............................................................................... 25
Prior to Start Up ................................................................. 25
Initial Start Up..................................................................... 25
Checking Venting ............................................................... 26
MAINTENANCE ..................................................................... 29
Venting System .................................................................. 29
Intake Air Screen ................................................................ 29
Water Heaters .................................................................... 30
SERVICE ................................................................................. 32
TROUBLESHOOTING ............................................................ 34
NOTES .................................................................................... 50
LIMITED WARRANTY ............................................................. 51
2