Rheem RTGH-RH11DV - Page 5

AP18733 REV. 3.2.17
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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