Rinnai EX22C (RHFE-559FTA) Adjust Gas Pressure Settings, Natural Gas, Propane Gas, EX17C

Adjust Gas Pressure Settings

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.

Pressure

Point

Test Switch

PC Board

Nozzle Manifold

Pressure

Point

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