Rinnai EX08C (RHFE-202FTA) Adjust Gas Pressure Settings, Natural Gas, Propane Gas, EX11C

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.

Test Switch

PC Board

Pressure

Point

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
EX08C
Manifold test	0.58 in	0.62 in	0.70 in	0.78 in	0.86 in	0.92 in	1.04 in	1.16 in
pressure -
	(15 mm)	(16 mm)	(18 mm)	(20 mm)	(22 mm)	(24 mm)	(27 mm)	(29 mm)
W.C. Low
Manifold test	3.4 in	3.6 in	4.1 in	3.2 in	5.8 in	6.2 in	7.0 in	5.5 in
pressure -
	(86 mm)	(92 mm)	(103 mm)	(82 mm)	(147 mm)	(158 mm)	(177 mm)	(140 mm)
W.C. High
EX11C
Manifold test	0.60 in	0.64 in	0.72 in	0.80 in	1.06 in	1.16 in	1.28 in	1.41 in
pressure -
	(15 mm)	(16 mm)	(19 mm)	(20 mm)	(27 mm)	(29 mm)	(33 mm)	(36 mm)
W.C. Low
Manifold test	2.2 in	1.9 in	1.7 in	1.6 in	3.8 in	3.3 in	3.0 in	2.7 in
pressure -
	(56 mm)	(49 mm)	(44 mm)	(40 mm)	(95 mm)	(84 mm)	(75 mm)	(69 mm)
W.C. High

*For the EX11C with natural gas: Use A1, A2, A3, or A4 for venting up to 7 feet (2.1 m) with one elbow.

Use A5, A6, A7, or A8 for venting exceeding 7 feet (2.1 m) with one elbow.

Rinnai Corporation EX08C, EX11C Manual 27