Rinnai RHFE-551FA Service Manual page 93

Gas Pressure Setting Procedure
10.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.
11.After adjusting the low fire pressure, press the PL
switch.
12.Press the PH switch to adjust the high fire
pressure.
13.Compare the pressure reading on the manometer
to the desired manifold test pressure (high) for
your gas type and altitude. If necessary adjust the
low fire pressure using the ▲ and ▼ buttons.
14.After adjusting the high fire pressure, press the PH
switch.
15.Press the ON/OFF button again. The LED display
turns blank and the appliance returns to the
normal OFF mode.
16.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
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.
Rinnai Direct Vent Service Manual
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
Long, clear, blue,
stable flames
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-433RWTA
RHFE-558RWTA
93