Richmond RMTGHRH111DVLN User Manual

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AP18733 REV. 3.2.17

H. REMOVING A WATER HEATER FROM A COMMON VENT SYSTEM..........................................................................25

I. UNPACKING THE WATER HEATER..............................................................................................................................25

J. WALL-MOUNTING THE WATER HEATER....................................................................................................................26

VENTING................................................................................................................................................................................27

A. INTAKE PIPE AND EXHAUST VENT GUIDELINES........................................................................................................27

B. APPROVED VENT MATERIALS...................................................................................................................................30

C. ALLOWED SCHEDULE 40 VENT LENGTHS (PVC, CPVC, PP).................................................................................31

D. TIGHTENING WATER HEATER COLLAR TO EXHAUST VENT AND INTAKE PIPE.................................................32

E. VENT TERMINATION....................................................................................................................................................32

1. Direct Vent, Two Pipe Roof and Sidewall Vent Terminations...............................................................................33

2. Direct Vent, Optional Horizontal and Vertical Vent Kits........................................................................................33

3. Screen Installation....................................................................................................................................................33

4. Power Venting, Indoor Combustion Air Installation in Conned or Unconned Space....................................34

F. COMMON VENT PIPING...............................................................................................................................................36

1. VENT DIAMETER SIZING AND LENGTHS..............................................................................................................36

2. RECOMMENDED EXHAUST PIPE TRANSITIONS.................................................................................................37

3. TWO PIPE VENT SYSTEM (DIRECT VENT)............................................................................................................38

INSTALL THE CONDENSATE DRAIN..................................................................................................................................38

GAS PIPING..........................................................................................................................................................................40

A. GAS PIPE SIZING TABLES..............................................................................................................................................40

1. Gas Pipe Sizing.................................................................................................................................................................40

2. Natural Gas Pipe Sizing...................................................................................................................................................40

3. LP (Liquid Propane) Gas Pipe Sizing..............................................................................................................................41

B. GAS CONNECTION REQUIREMENTS............................................................................................................................42

C. ADDITIONAL PRECAUTION FOR EXCESS FLOW VALVE (EFV)..................................................................................43

D. ADJUSTING GAS PRESSURE AT THE WATER HEATER..............................................................................................43

E. SETTING AND VERIFYING THE COMBUSTION SETTING............................................................................................43

WATER PIPING ......................................................................................................................................................................44

A. GENERAL PLUMBING CONNECTION GUIDELINES.....................................................................................................44

B. INSTALL A BACKFLOW PREVENTER........................................................................................................................... 46

C. PIPING THE WATER HEATER.........................................................................................................................................46

D. APPLICATIONS.................................................................................................................................................................46

E. PRESSURE RELIEF VALVE.............................................................................................................................................49

CONNECT ELECTRICAL POWER / INITIAL STARTUP.......................................................................................................50

A. WIRING INFORMATION................................................................................................................................................... 50

B. DIP SWITCHES.................................................................................................................................................................51

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Richmond RMTGHRH111DVLN Encore 11 GPM 199,900 BTU Tankless Natural Gas Water Heater

User Manual - Page 5