Westinghouse WGRTNG199 Nstallation & Maintenance Manual page 5

Residential tankless water heater

User's information manual (12 pages)

Table of Contents

3. Screen Installation ..................................................................................................................................................................... 20

PART 6 - INSTALL THE CONDENSATE DRAIN ..................................................................................................................... 21

PART 7 - GAS PIPING .............................................................................................................................................................. 21

A. GAS PIPE SIZING TABLES ..................................................................................................................................................... 21

1. Gas Pipe Sizing .......................................................................................................................................................................... 21

2. Natural Gas Pipe Sizing ............................................................................................................................................................ 21

3. LP (Liquid Propane) Gas Pipe Sizing ....................................................................................................................................... 22

B. GAS CONNECTION REQUIREMENTS ................................................................................................................................... 22

C. ADJUSTING GAS PRESSURE AT THE WATER HEATER ..................................................................................................... 24

PART 8 - WATER PIPING ........................................................................................................................................................ 24

A. GENERAL PLUMBING CONNECTION GUIDELINES ............................................................................................................. 24

B. INSTALL A BACKFLOW PREVENTER .................................................................................................................................... 24

C. PIPING THE WATER HEATER ................................................................................................................................................ 24

D. PIPING DIAGRAM.................................................................................................................................................................... 25

E. PRESSURE RELIEF VALVE .................................................................................................................................................... 25

PART 9 - CONNECT ELECTRICAL POWER / INITIAL STARTUP ......................................................................................... 26

A. WIRING INFORMATION .......................................................................................................................................................... 26

B. DIP SWITCHES ........................................................................................................................................................................ 27

PART 10 - OPERATING SYSTEM INSTRUCTIONS ................................................................................................................ 32

A. CONTROL PANEL ................................................................................................................................................................... 32

B. LCD DISPLAY DESCRIPTIONS .............................................................................................................................................. 32

C. START-UP SEQUENCE .......................................................................................................................................................... 32

D. CHANGING THE DHW SET-POINT ........................................................................................................................................ 33

E. CHANGING THE TEMPERATURE INDICATOR ..................................................................................................................... 33

G. STATUS DISPLAY MODE ....................................................................................................................................................... 33

H. INSTALLER MODE .................................................................................................................................................................. 34

F. ERROR MODE ......................................................................................................................................................................... 35

G. ERROR TREE ANALYSIS ....................................................................................................................................................... 38

1. FLAME DETECTION ................................................................................................................................................................... 38

2. GAS DETECTION ....................................................................................................................................................................... 39

3. AIR PRESSURE SWITCH ........................................................................................................................................................... 39

4. Inlet / DHW / Operating Temperature SENSORS ..................................................................................................................... 39

PART 11 - FINAL INSTALLATION CHECKLIST ..................................................................................................................... 40

PART 12 - TROUBLESHOOTING ............................................................................................................................................ 41

PART 13 - MAINTENANCE PROCEDURES ............................................................................................................................ 42

REPLACEMENT PARTS ................................................................................................................................................................ 47

Limited Warranty for Residential Tankless Water Heaters ........................................................................................................ 49

MAINTENANCE REPORT .............................................................................................................................................................. 51

MAINTENANCE NOTES ................................................................................................................................................................. 55

CUSTOMER INSTALLATION RECORD FORM ............................................................................................................................. 56

WHL-004 REV. 12.17.14

Table of Contents