HTP PH100-55 - Table of Contents

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TABLE OF CONTENTS

PART 1 – GENERAL SAFETY INFORMATION .......................................................................................... 7

A. PRECAUTIONS .................................................................................................................................... 7

B. IMPROPER COMBUSTION.................................................................................................................. 7

C. GAS ....................................................................................................................................................... 7

D. WHEN SERVICING THE HEATER ...................................................................................................... 7

E. HEATER WATER .................................................................................................................................. 7

PART 2 – HOW THE HEATER OPERATES ................................................................................................ 8

PART 3 – PREPARE WATER HEATER LOCATION .................................................................................. 9

A. BEFORE LOCATING THE HEATER .................................................................................................... 9

B. LEVELING ............................................................................................................................................. 9

C. CLEARANCES FOR SERVICE ACCESS .......................................................................................... 10

D. RESIDENTIAL GARAGE INSTALLATION ......................................................................................... 10

E. EXHAUST VENT AND INTAKE AIR VENT ........................................................................................ 10

1. DIRECT VENT INSTALLATION OF EXHAUST AND INTAKE ....................................................... 11

2. INDOOR COMBUSTION AIR INSTALLATION IN CONFINED OR UNCONFINED SPACE .......... 11

F. PREVENT COMBUSTION AIR CONTAMINATION ........................................................................... 12

G. REMOVING A HEATER FROM A COMMON VENT SYSTEM.......................................................... 12

H. WATER CHEMISTRY ......................................................................................................................... 13

PART 4 – PREPARE THE HEATER .......................................................................................................... 14

PART 5 – HEATER PIPING ....................................................................................................................... 15

A. GENERAL PIPING INFORMATION ................................................................................................... 15

B. SCALDING .......................................................................................................................................... 15

C. TEMPERATURE AND PRESSURE RELIEF VALVE ......................................................................... 16

D. BACKFLOW PREVENTER ................................................................................................................. 16

E. POTABLE EXPANSION TANK ........................................................................................................... 16

F. WATER PIPING .................................................................................................................................. 17

G. AUXILIARY CONNECTIONS ............................................................................................................. 17

H. PIPING DIAGRAMS ............................................................................................................................ 18

PART 6 – ELECTRICAL CONNECTIONS ................................................................................................. 25

A. LINE VOLTAGE INPUT ...................................................................................................................... 25

B. LINE VOLTAGE CONDENSATE OUTPUT ........................................................................................ 25

C. LOW VOLTAGE OUTDOOR SENSOR INPUT .................................................................................. 25

PART 7 – GAS CONNECTIONS ................................................................................................................ 25

A. GAS PIPING ....................................................................................................................................... 26

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HTP PH100-55 - Table of Contents

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