Rinnai RHFE-551FA Service Manual page 83

Gas Pressure Setting Procedure
The LED display turns blank and the unit
returns to the normal off mode. While
programming the correct low fire and high fire
gas pressure settings, do not adjust gas
pressure on this appliance using the screw on
top of the gas valve.
11. Press the ON/OFF button to operate the
appliance.
CAUTION
Do not touch the areas at or near the exhaust. These
areas become very hot and could cause burns.
12. Press the SW1 switch. The LED will display "78".
13. Press the SW1 switch again to change to the low
pressure mode. The LED will display "PL".
14. Compare the pressure reading on the manometer
to the desired manifold test pressure (low) for your
gas type and altitude. If necessary adjust the low
fire pressure using the ▲ and ▼ buttons.
15. Press the Economy button to record into memory.
The LED will display "18".
16. Press the SW1 switch twice. The LED will display
"PH" indicating high fire mode.
17. Compare the pressure reading on the manometer
to the desired manifold test pressure (high) for
your gas type and altitude. If necessary adjust
the high fire pressure using the ▲ and ▼ buttons.
18. Press the Economy button to record into memory.
The LED will display "78".
19. Press the ON/OFF button again. The LED display
turns blank and the appliance returns to the
normal OFF mode.
20. Remove manometer and install Allen head
screws. Operate the unit and
•check the normal operating sequence
•visually inspect the flame
•check for gas leaks at the test points
Long, clear, blue,
stable flames
Rinnai Direct Vent Service Manual
Normal Operating Sequence
When you press the ON/OFF button, the LED display
will illuminate, the combustion fan will begin to run,
and the spark will ignite the main burner.
This heater has an automatic ignition system. When
the main burner has lit, the combustion lamp will glow
red, and the spark will stop.
Visual Inspection of Flame
Check that the burner flames are operating normally.
The flame can be seen through the circular window
through the louvers.
When operating normally the burner flame should
appear as long, clear, blue, stable, streaks. Yellow
flames or an orange color is abnormal and
maintenance is required.
NORMAL
Flame Rod
ABNORMAL
Flame Rod
Yellow flames or
orange color
Final Assembly
1.Install the front panel and bottom cover.
2. Place the conversion plate (label) on the front
cover.
RHFE-201RFA
RHFE-263RFA
83