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TABLE OF CONTENTS
PART 1 – GENERAL SAFETY INFORMATION .......................................................................................................4
A. PRECAUTIONS ................................................................................................................................................................... 4
B. WHEN SERVICING THE WATER HEATING SYSTEM ....................................................................................................... 4
C. HEATER WATER ................................................................................................................................................................ 4
PART 2 – PREPARE THE WATER HEATER ...........................................................................................................4
A. SPECIFICATIONS AND PERFORMANCE RATINGS ......................................................................................................... 5
B. PERFORMANCE AND SIZING GUIDELINES ..................................................................................................................... 6
C. LOCATING THE WATER HEATER ..................................................................................................................................... 6
D. ANODE ROD ....................................................................................................................................................................... 7
PART 3 – HEATER PIPING .......................................................................................................................................7
A. PLUMBING .......................................................................................................................................................................... 7
B. BOILER CONNECTIONS .................................................................................................................................................... 7
C. COLD WATER INLET .......................................................................................................................................................... 8
D. SCALDING .......................................................................................................................................................................... 8
E. TEMPERATURE AND PRESSURE RELIEF VALVE ........................................................................................................... 9
F. HOT WATER OUTLET ........................................................................................................................................................ 9
G. POTABLE EXPANSION TANK .......................................................................................................................................... 10
H. PRESSURE DROP SIZING FOR CIRCULATOR .............................................................................................................. 10
I. INSTALLATION DIAGRAMS ............................................................................................................................................... 11
PART 4 – HEATER CONTROL AND WIRING ....................................................................................................... 16
A. CONTROL ......................................................................................................................................................................... 16
B. WIRING ............................................................................................................................................................................. 16
PART 5 – OPERATING THE HEATER .................................................................................................................. 16
PART 6 – MAINTENANCE AND TROUBLESHOOTING ....................................................................................... 17
HTP CUSTOMER INSTALLATION RECORD FORM ..................................................................................... 20