433Rfa, 558Rfa - Rinnai RHFE-551FA Service Manual

Gas Pressure Setting Procedure
CAUTION
Do not touch any other areas on the PC board besides
the 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. These
areas become very hot and could cause burns.
1. Turn off the gas and the power supply.
2. Hold both ends of the bottom cover (undercover
assembly) and pull toward you to remove the
cover. Cover snaps in place.
3. Remove the 6 screws that hold the louver
assembly and 2 screws at the bottom of the front
panel to remove panel from the unit. Pull the
panel out at the bottom about 4 inches (100 mm)
and lift up over clips that hold it in place at the
unit's top.
4. Remove two test point screws (1/8 NPT tap) with
3/16 Allen wrench and attach the manometer to
both test ports. Both ports must be used in order
to measure the differential pressure. Ensure that
the manometer is properly calibrated.
5. 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.
6. Select the correct code for gas type and altitude
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)
7. Press the SW1 test button to record the gas type
code into memory. The LED will display "F1". If
not shown, use the ▲ and ▼ buttons to obtain
"F1".
Rinnai Direct Vent Service Manual
Pressure Point
Nozzle Manifold
Pressure Point
Set Temp
RoomTemp
Temp
Control
RHFE-433RFA
RHFE-558RFA
SW1 Switch
PC Board
LED
display
89