2
Rinnai Corporation ES38 Conversion Manual
Conversion of the appliance for operation at high altitudes (> 2000 ft, 610 m) requires the completion of the
section,
Adjust Gas Pressure Settings
, using the high altitude manifold test pressures above. No parts need to be
replaced for high altitude.
High Altitude Installation
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.
The input rate can be verified by following the procedure in the National Fuel Gas Code (NFPA54 / ANSI Z223.1,
2006 or latest edition).
Technical Data
Natural Gas
Propane Gas
Burner Orifice - High
1004F-2031-B-1.80
0.071 in (1.80 mm)
1004F-2031-A-0.95
0.037 in (0.95 mm)
Burner Orifice - Low
1004F-2036-B-1.95
0.077 in (1.95 mm)
Damper Adjustment
Front Right Left Front Right Left
7/10 10/10 10/10 10/10 10/10 10/10
1004F-2036-A-1.20
0.047 in (1.20 mm)
Natural Gas
Propane Gas
Code
A1 A2 A3 A4 L1 L2 L3 L4
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
1.97 in
(50
mm
)
1.97 in
(50
mm
)
1.97 in
(50
mm
)
1.97 in
(50
mm
)
4.29 in
(109
mm
)
4.29 in
(109
mm
)
4.29 in
(109
mm
)
4.29 in
(109
mm
)
Manifold test
pressure -
W.C.
High
3.7 in
(94
mm
)
3.3 in
(83
mm
)
3.0 in
(76
mm
)
2.8 in
(70 mm)
10.1 in
(257
mm
)
9.1 in
(232
mm
)
8.3 in
(212
mm
)
7.6 in
(194
mm
)
Natural Gas
Propane Gas
Minimum supply gas pressure
5.0 in (127 mm) W.C.
11.0 in (280 mm) W.C.
Maximum supply gas pressure
10.5 in (267 mm) W.C.
13.0 in (330 mm) W.C.
BTU/hour input
Low 10,500 High 38,400
Low 10,500 High 36,500
BTU/hour output
Low 8,400 High 30,720
Low 8,400 High 29,200