Filter
Top Products
28 Rinnai Corporation EX17C / EX22C Manual
1. Turn off the gas and the power supply.
2. Remove the 5 screws that hold the louver assembly
and front panel. Lift the panel straight up and then
remove it.
3. Remove two pressure point screws (1/8 NPT tap) with
3/16 Allen wrench and attach the manometer to both
pressure points. Both pressure points must be used
in order to measure the differential pressure. Ensure
that the manometer is properly calibrated.
4. Turn on the gas and power supply to the appliance.
(Press the “Set back” button after turning on the
power supply.) With the unit in the off position, press
the test switch at the top of PC board until it beeps.
5. Select the correct code for gas type and altitude using
▲ and ▼ buttons. Refer to the table below.
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.
Pressure
Point
Pressure
Point
Nozzle Manifold
Test Switch
Natural Gas Propane Gas
Altitude
0-2000 ft
0-610 m
2001-5200 ft
611-1585 m
5201-7700 ft
1586-2347 m
7701-10200 ft
2348-3109 m
0-2000 ft
0-610 m
2001-5200 ft
611-1585 m
5201-7700 ft
1586-2347 m
7701-10200 ft
2348-3109 m
Manifold test
pressure -
W.C. Low
0.44 in
(11 mm)
0.48 in
(12 mm)
0.54 in
(14 mm)
0.60 in
(15 mm)
0.68 in
(17 mm)
0.74 in
(19 mm)
0.82 in
(21 mm)
0.92 in
(23 mm)
Manifold test
pressure -
W.C. High
1.6 in
(40 mm)
1.4 in
(35 mm)
1.2 in
(32 mm)
1.1 in
(29 mm)
2.7 in
(69 mm)
2.4 in
(61 mm)
2.2 in
(55 mm)
2.0 in
(50 mm)
EX22C
Manifold test
pressure -
W.C. Low
0.44 in
(11 mm)
0.48 in
(12 mm)
0.54 in
(14 mm)
0.60 in
(15 mm)
0.68 in
(17 mm)
0.74 in
(19 mm)
0.82 in
(21 mm)
0.92 in
(23 mm)
Manifold test
pressure -
W.C. High
2.6 in
(65 mm)
2.2 in
(57 mm)
2.0 in
(52 mm)
1.8 in
(47 mm)
4.0 in
(101 mm)
3.5 in
(89 mm)
3.1 in
(80 mm)
2.9 in
(72 mm)
EX17C
Code
A1 / A5 A2 / A6 A3 / A7 A4 /A8 L1 / L5 L2 / L6 L3 / L7 L4 / L8
Adjust Gas Pressure Settings
PC Board