Lockout Check Lists - Rinnai RHFE-551FA Service Manual

Lockout Checklist
1. Check high fire manifold differential pressure, gas pressure should be:
4.5" WC on the RHFE556WTA propane gas units.
3.8" WC on the RHFE556WTA on natural gas
2.8" WC on the RHFE431WTA on propane gas units
2.4" WC on the RHFE431WTA on natural gas.
2. Check low fire manifold differential pressure, gas pressure should be:
0.8" WC on the RHFE556WTA propane gas units.
0.7" WC on the RHFE556WTA natural gas units.
___ 0.8" WC on the RHFE 431WTA propane gas units
___ 0.7" WC on the RHFE 431 WTA natural gas units
3. Ensure proper secondary air damper has been installed.
556WTA Propane secondary air damper has (15) small holes in it - part # 556F-208-15
556WTA Natural gas secondary air damper has (1) rectangular hole - part # 556F- 208-7
___ 556WTA Propane primary air damper part # 556F-209-15
___ 556WTA Natural primary air damper part # 556F-209-7
___ 431WTA Propane primary air damper 556F-209-15
___ 431WTA Natural primary air damper 556F-209-7
___ 431WTA Propane secondary air damper part # 556F-208-5
___ 431WTA Natural secondary air damper part#556F-208-7.
4. Ensure unit has proper size orifices in it.
Orifice sizes for the RHFE556/431WTA propane gas units are 0.85mm or 0.033" - part # AU129-210x02-
0.85.
Orifice sizes for the RHFE556/431WTA natural gas are 1.13mm or 0.044" - part # AU129-210x02-1.13.
5. Ensure gas type listed on rating plate matches gas type connected to unit.
6. Check for proper dip switch settings on PC board:
___ Proper settings for the RHFE-556WTA propane gas units are, switch #1 is ON, switch #2 is OFF, switch
#3 is OFF, switch #4 is OFF, switch # 5 is ON, and switch #6 is ON.
___ Proper settings for the RHFE556WTA natural gas units are, switch #1 is OFF, switch #2 is ON, switch #3
is OFF, switch #4 is OFF, switch #5 is ON, switch #6 is ON.
___ Proper settings for the RHFE 431WTA propane gas units are switch #1 is ON, switch #2 is OFF, switch #3
is OFF, switch #4 is ON, switch #5 is ON, and switch #6 is ON.
___ Proper settings for the RHFE 431 WTA on natural gas units are, switch #1 is OFF, switch #2 is ON, switch
#3 is OFF, switch #4 is ON, switch #5 is ON, and switch #6 is ON.
7. Inspect wall vent to ensure it is not clogged or restricted in any way. For proper inspection of the
combustion chamber air way, vent MUST be removed from wall.
8. Remove flame rod and electrode and inspect for cracks and/or carbon buildup. Clean flame rod and
electrode with sand paper. Also, check electrode gap setting, should be 1/8" - 3/16".
9. Check all wire connections for loose and/or broken pins or connections. Disconnect electrical power
before performing above task.
26 Rinnai Direct Vent Service Manual
RHFE-431WTA
RHFE-556WTA