Rinnai ES38 RHFE-1004RFA Conversion Manual page 4

Adjust Gas Pressure Settings
CAUTION
Do not touch any other areas on the PC board
besides the "SW" switches while power is supplied to
the appliance. Parts of the PC board are supplied
with 120 volts AC.
CAUTION
Do not touch the areas at or near the exhaust. This
area becomes very hot and could cause burns.
1. Turn off the gas and the power supply.
2. Remove one test point screw (1/8 NPT tap) with 3/16
Allen wrench and attach the manometer to the test
port. Ensure that the manometer is properly
calibrated.
3. Turn on the gas and power supply to the appliance.
With the unit in the Off position, press the SW1 switch
at the top of PC board until it beeps.
4. Select the correct code for gas type and altitude on
the LED display using ▲ and ▼ buttons:
L1: Propane gas below 2000 ft (610 m)
L2: Propane gas 2001-5200 ft (611-1585 m)
L3: Propane gas 5201-7700 ft (1586-2347 m)
L4: Propane gas 7701-10200 ft (2348-3109 m)
A1: Natural gas below 2000 ft (610 m)
A2: Natural gas 2001-5200 ft (611-1585 m)
A3: Natural gas 5201-7700 ft (1586-2347 m)
A4: Natural gas 7701-10200 ft (2348-3109 m)
5. Press the SW1 switch to enter the gas code into
memory.
The LED display turns blank and the unit returns
to the normal off mode. You are now ready to
program in your correct low fire and high fire gas
pressure setting. Follow the procedure below for
setting the manifold gas pressure. Do not adjust
gas pressure on this appliance using the screw
on top of the gas valve.
6. Press the ON/OFF button to operate the appliance.
7. Press the SW1 switch. The LED will display two
digits - a "7" and another number.
8. Press the SW1 switch again to change to the low
pressure mode. The LED will display "PL".
9. Compare the pressure reading on the manometer to
the correct table for your gas type. If necessary
adjust the low fire pressure using the ▲ and ▼
buttons. Press the Economy switch to record into
4 Rinnai Corporation ES38 Conversion Manual
CAUTION
Do not insert hands or objects into the circulation fans
while they are running. Injury or mechanical
malfunction may occur.
Display
Temp
Time