Adjust Gas Pressure Settings - Rinnai ENERGYSAVER EX17C Operation And Installation Manual

Adjust Gas Pressure Settings

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. 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.
Code
A1 / A5
0-2000 ft
Altitude
0-610 m
EX17C
Manifold test
0.44 in
pressure -
(11 mm)
W.C. Low
Manifold test
1.6 in
pressure -
(40 mm)
W.C. High
EX22C
Manifold test
0.44 in
pressure -
(11 mm)
W.C. Low
Manifold test
2.6 in
pressure -
(65 mm)
W.C. High
28
Natural Gas
A2 / A6 A3 / A7
2001-5200 ft 5201-7700 ft
611-1585 m 1586-2347 m
0.48 in 0.54 in
(12 mm) (14 mm)
1.4 in 1.2 in
(35 mm) (32 mm)
0.48 in 0.54 in
(12 mm) (14 mm)
2.2 in 2.0 in
(57 mm) (52 mm)
Rinnai Corporation EX17C / EX22C Manual
Pressure
Point
Test Switch
PC Board
Nozzle Manifold
Pressure
Point
A4 /A8 L1 / L5
7701-10200 ft 0-2000 ft
2348-3109 m 0-610 m
0.60 in 0.68 in
(15 mm) (17 mm)
1.1 in 2.7 in
(29 mm) (69 mm)
0.60 in 0.68 in
(15 mm) (17 mm)
4.0 in
1.8 in
(101 mm)
(47 mm)
Propane Gas
L2 / L6 L3 / L7
2001-5200 ft 5201-7700 ft
611-1585 m 1586-2347 m
0.74 in 0.82 in
(19 mm) (21 mm)
2.4 in 2.2 in
(61 mm) (55 mm)
0.74 in 0.82 in
(19 mm) (21 mm)
3.5 in 3.1 in
(89 mm) (80 mm)
L4 / L8
7701-10200 ft
2348-3109 m
0.92 in
(23 mm)
2.0 in
(50 mm)
0.92 in
(23 mm)
2.9 in
(72 mm)