Installation Manual

ManualsBrandsWestinghouse ManualsWater HeaterWestinghouse WGC119NG199

WHL-019 REV. 12.17.14

The latest version of the National Electrical Code, NFPA No. 70.

NOTE: The gas manifold and controls met safe lighting and other performance criteria when undergoing tests specified in ANSI

Z21.10.3 – latest edition.

TABLE OF CONTENTS

PART 1 – GENERAL SAFETY INFORMATION .......................................................................................................................... 5

A. PRECAUTIONS .......................................................................................................................................................................... 5

B. IMPROPER COMBUSTION ........................................................................................................................................................ 6

C. GAS ............................................................................................................................................................................................ 6

D. WHEN SERVICING THE HEATER ............................................................................................................................................. 6

E. HEATER WATER........................................................................................................................................................................ 6

PART 2 – BEFORE YOU START ................................................................................................................................................ 7

A. WHAT’S IN THE BOX ................................................................................................................................................................. 7

B. HOW THE HEATER OPERATES ............................................................................................................................................... 7

C. OPTIONAL EQUIPMENT ........................................................................................................................................................... 8

PART 3 – PREPARE WATER HEATER LOCATION .................................................................................................................. 8

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 PIPE ....................................................................................................................................... 10

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

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

F. PREVENT COMBUSTION AIR CONTAMINATION .................................................................................................................. 11

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

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

PART 4 – HEATER PIPING ....................................................................................................................................................... 16

A. GENERAL PIPING INFORMATION .......................................................................................................................................... 16

B. SCALDING ................................................................................................................................................................................ 17

C. TEMPERATURE AND PRESSURE RELIEF VALVE................................................................................................................ 17

D. BACKFLOW PREVENTER ....................................................................................................................................................... 17

E. POTABLE EXPANSION TANK ................................................................................................................................................. 17

F. WATER PIPING ........................................................................................................................................................................ 18

G. AUXILIARY CONNECTIONS ................................................................................................................................................... 18

H. PIPING DIAGRAMS .................................................................................................................................................................. 19

PART 5 – VENTING, COMBUSTION AIR AND CONDENSATE REMOVAL............................................................................ 27

A. GENERAL ................................................................................................................................................................................. 27

B. APPROVED MATERIALS FOR EXHAUST VENT AND INTAKE PIPE .................................................................................... 28

C. REQUIREMENTS FOR INSTALLATION IN CANADA .............................................................................................................. 28

D. EXHAUST VENT AND INTAKE PIPE LOCATION.................................................................................................................... 29

E. EXHAUST VENT AND INTAKE PIPE SIZING .......................................................................................................................... 30