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Adjust Gas Pressure Settings
Complete these instructions for altitudes greater than 2000 ft, 610 m.
For high altitude installations in Canada, the conversion shall be carried out by a manufacturer's authorized
representative, in accordance with the requirements of the manufacturer, provincial or territorial authorities having
jurisdiction and in accordance with the requirements of CAN/CGA-B149.1 or CAN/CGA-B149 installation codes.
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:
Code
A1
0-2000 ft
Altitude
0-610 m
Manifold test
1.97 in
pressure -
(50
mm
W.C. Low
Manifold test
3.7 in
pressure -
(94
mm
W.C. High
28
Natural Gas
A2
A3
2001-5200 ft
5201-7700 ft
611-1585 m
1586-2347 m
1.97 in
1.97 in
)
(50
)
(50
mm
mm
3.3 in
3.0 in
)
(83
)
(76
mm
mm
Rinnai Corporation ES38 Manual
CAUTION
Do not insert hands or objects into the circulation fans
while they are running. Injury or mechanical
malfunction may occur.
NOTICE
The regulator has been factory pre-set. If the
pressure is incorrect, check the supply pressure first,
before making any adjustments to the appliance.
Also, if the low control pressure cannot be obtained,
adjust the adjustment screw on the proportional valve
to roughly set pressure and then recheck both the low
and high fire pressures.
A4
L1
7701-10200 ft
0-2000 ft
2348-3109 m
0-610 m
1.97 in
4.29 in
)
(50
)
(109
mm
mm
2.8 in
10.1 in
)
(70 mm)
(257
mm
Propane Gas
L2
L3
2001-5200 ft
5201-7700 ft
611-1585 m
1586-2347 m
4.29 in
4.29 in
)
(109
)
(109
mm
mm
9.1 in
8.3 in
)
(232
)
(212
mm
mm
L4
7701-10200 ft
2348-3109 m
4.29 in
)
(109
)
mm
7.6 in
)
(194
)
mm
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