Adjust Gas Pressure Settings
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.
Do not touch the areas at or near the glass panel or exhaust. These areas become very hot and could cause burns.
11.Press the ON/OFF button to operate the appliance.
12.Press the SW1 switch. The LED will display “78” or “7” followed by a symbol.
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. The LED will display “18” indicating that the low pressure has been recorded into memory.
16.Press the SW1 switch TWICE. This puts the appliance into the high fire mode. The LED will display “PH”.
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 enter the high fire pressure into memory. The LED display will display “78”. If the LED shows any thing other than “78” call Rinnai Technical Support at
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
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
Long, clear, blue, stable flames
ABNORMAL
Flame Rod
Yellow flames or orange color
Final Assembly
1Install the front panel and bottom cover.
2Place the conversion plate (label) on the front cover.
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