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LP-505 REV. 4.29.14

3. Direct Vent, Optional Horizontal and Vertical Concentric Vent ............................................................................................. 21

4. Screen Installation ..................................................................................................................................................................... 22

PART 6 – INSTALL THE CONDENSATE DRAIN ..................................................................................................................... 22

PART 7 – GAS PIPING .............................................................................................................................................................. 22

A. GAS PIPE SIZING TABLES ..................................................................................................................................................... 23

1. Gas Pipe Sizing .......................................................................................................................................................................... 23

2. Natural Gas Pipe Sizing ............................................................................................................................................................ 23

3. LP (Liquid Propane) Gas Pipe Sizing ....................................................................................................................................... 23

B. GAS CONNECTION REQUIREMENTS ................................................................................................................................... 23

C. ADJUSTING GAS PRESSURE AT THE WATER HEATER ..................................................................................................... 25

PART 8 – WATER PIPING ........................................................................................................................................................ 25

A. GENERAL PLUMBING CONNECTION GUIDELINES ............................................................................................................. 25

B. INSTALL A BACKFLOW PREVENTER .................................................................................................................................... 25

C. PIPING THE WATER HEATER ................................................................................................................................................ 26

D. PIPING DIAGRAM.................................................................................................................................................................... 26

E. PRESSURE RELIEF VALVE .................................................................................................................................................... 27

PART 9 – CONNECT ELECTRICAL POWER / INITIAL STARTUP ......................................................................................... 27

A. WIRING INFORMATION .......................................................................................................................................................... 28

B. DIP SWITCHES ........................................................................................................................................................................ 28

PART 10 – OPERATING SYSTEM INSTRUCTIONS ................................................................................................................ 34

A. CONTROL PANEL ................................................................................................................................................................... 34

B. LCD DISPLAY DESCRIPTIONS .............................................................................................................................................. 34

C. START-UP SEQUENCE .......................................................................................................................................................... 34

D. CHANGING THE DHW SET-POINT ........................................................................................................................................ 35

E. CHANGING THE TEMPERATURE INDICATOR ..................................................................................................................... 35

G. STATUS DISPLAY MODE ....................................................................................................................................................... 35

H. INSTALLER MODE .................................................................................................................................................................. 36

F. ERROR MODE ......................................................................................................................................................................... 37

G. ERROR TREE ANALYSIS ....................................................................................................................................................... 40

1. FLAME DETECTION ................................................................................................................................................................... 40

2. GAS DETECTION ....................................................................................................................................................................... 41

3. AIR PRESSURE SWITCH ........................................................................................................................................................... 41

4. Inlet / DHW / Operating Temperature SENSORS ..................................................................................................................... 41

PART 11 – FINAL INSTALLATION CHECKLIST ..................................................................................................................... 42

PART 12 – TROUBLESHOOTING ............................................................................................................................................ 43

PART 13 – MAINTENANCE PROCEDURES ............................................................................................................................ 44

REPLACEMENT PARTS ................................................................................................................................................................ 49

Limited Warranty for RT-180 / RT-199 Water Heaters ................................................................................................................. 51

MAINTENANCE REPORT .............................................................................................................................................................. 53

MAINTENANCE NOTES ................................................................................................................................................................. 57

HTP CUSTOMER INSTALLATION RECORD FORM ..................................................................................................................... 58

Brand	HTP
Model	RT-180
Category	Boiler
Language	English

HTP RT-180 User Manual

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HTP RT-180 Specifications

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