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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.Adjust the dip switch positions for your altitude, gas
type, model, and temperature scale. (Refer to the
table below.)
5.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.
6.Turn on the gas and power supply to the appliance.
7.Press the ON/OFF button to operate the appliance.
8.Press the TEST switch at the right of PC board.
9.Press the PL switch to adjust the low fire test
pressure
Altitude
Gas Type
0-2000 ft
Natural Gas
(0-610 m)
Propane
2001-5200 ft
Natural Gas
(611-1585 m)
Propane
5201-7700 ft
Natural Gas
(1586-2347 m)
Propane
(7701-10200 ft)
Natural Gas
(2348-3109 m)
Propane
92
Dip Switch Positions
1
2
OFF
OFF
OFF
ON
ON
ON
ON
OFF
OFF
OFF
ON
ON
OFF
ON
OFF
ON
OFF
ON
OFF
OFF
ON
ON
ON
OFF
Rinnai Direct Vent Service Manual
Pressure Point
Dip Switches
Nozzle Manifold
Pressure Point
3
4
OFF
RHFE-433RWTA
RHFE-558RWTA
1 2 3 4 5 6
OFF
High Fire Switch
Low Fire Switch
Test Switch
PC Board
5
6
ON for
ON for
EX17
Celsius
OFF for
OFF for
EX22
Fahrenheit
F
H
F
L
P
H
P
L
T
E
S
T
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Troubleshooting
