RATINGS ......................................................................... 7
Heater ............................................................................. 11
Direct Venting Options ................................................... 15
Sizing ............................................................................. 17
Materials .......................................................................... 18
PVC/CPVC ..................................................................... 20
Polypropylene ................................................................. 21
General Piping ............................................................... 34
Scalding .................................................................... 34
Natural Gas .................................................................... 40
Propane Gas .................................................................. 40
Gas Pressure ................................................................. 42
Alarm Contacts .............................................................. 43
2
Contents
Condensate Drain ............................................................ 46
23-29
Check Delta T ............................................................. 61
Displayed ............................................................... 66-71
Ladder Diagram ............................................................... 74
Wiring Diagram................................................................. 75