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14. HIGH ALTITUDE INSTALLATIONS
When installed above the altitude stipulated below for USA, the input must be de-rated by 4% for
each 1000 ft above the altitude listed. Refer to the tables below for orifice size and restrictions that
apply to high altitude installation (including total system length restrictions). Check with your local
utility regarding the gas supply and the de-rating of this appliance. Maintain gas supply pressure in-
dicated in Section 4.
USA: The factory installed orifice for this appliance is approved for altitudes zero to 2000 feet above
sea level. Installation above 2000': Please refer to ANSI Z223.1 National Fuel Gas Code, which re-
quires de-ration at a rate of 4% per 1000' above sea level.
14.A ORIFICE CONVERSION
Altitude Restrictions this Model:
1. Do not install at altitudes greater than 8,500 ft
2. Restrict the length of any model to the shortest tube length at altitudes greater than 4,500 ft
When this appliance is installed above the altitude stipulated in the Table below, the input must be
de-rated by 4% for each 1000 ft of altitude. If your local utility supplies gas with a de-rated heat
content, no orifice change is required in the heater . Check with your local utility regarding de-
rating, and the following specifically for country of installation:
TABLE 7– RINNAI RECOMMENDED ORIFICES - ALTITUDE CONVERSION
MODEL INPUT
RATE (MBH)
Supplied
0
#17
80 NG
906000091 906000128 906000128 906000128 906000099 906000099 906000089 906000089
#37
80 PROPANE
906000092 906000206 906000206 906000208 906000208 906000208 906000209 906000209
#4
115 NG
906000124 906000174 906000174 906000176 906000176 906000188 906000188 906000189
#31
115 PROPANE
906000070 906000202 906000202 906000203 906000203 906000203 906000205 906000205
E
155 NG
906000125 906000179 906000179 906000177 906000177 906000177 906000094 906000094
9/64"
155 PROPANE
906000104 906000087 906000087 906000095 906000095 906000095 906000070 906000070
Q
205 NG
906000127 906000102 906000102 906000187 906000187 906000186 906000186 906000098
#19
205 PROPANE
906000128 906000193 906000099 906000099 906000099 906000197 906000197 906000197
R
250 NG
906000100 906000102 906000102 906000102 906000187 906000187 906000187 906000186
#14
250 PROPANE
906000104 906000103 906000103 906000091 906000091 906000091 906000128 906000128
HE+ Series Modulating Supplemental Manual
FOR USE AT ALTITUDES ABOVE (FEET)
Gas Orifice Drill Size / Part#
2000
3000
4000
19
19
19
38
38
40
6
6
32
32
33
C
C
29
29
30
P
P
20
21
21
P
P
16
16
17
USA
5000
6000
21
21
40
40
8
8
10
33
33
A
A
A
30
30
O
O
N
21
25
P
O
O
17
17
30
8000
7000
23
23
42
42
10
13
36
36
1
1
31
31
N
M
25
25
O
N
19
19
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