Rinnai EX22C (RHFE-559FTA) User Manual

 

 

Rinnai Corporation EX17C / EX22C Manual 

 

29 

6.  Press the test switch twice to record the gas type 

code into memory. . 

7.  Press the ON/OFF button to operate the 

appliance. 

8.  Press the test switch twice.  The LED will display 

“PL” indicating low fire mode. 

9.  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.   

10.  Press the test switch.  The LED will display “PH” 

indicating high fire mode. 

11.  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. 

12.  Press the ON/OFF button again.  The LED display 

turns blank and the appliance returns to the 
normal OFF mode. 

13.  Remove manometer and install Allen head 

screws. Operate the unit and  

1.  Install the front panel and bottom cover. 

2.  If doing a gas type conversion, place the new 

conversion plate (label) on the front cover. 

Check that the burner flames are operating normally.  
The flame can be seen through the circular window. 

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     

Yellow flames or 
orange color  

Flame Rod 

•  check the normal operating sequence 

•  visually inspect the flame 
•  check for gas leaks at the test points 

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. 

  Adjust Gas Pressure Settings