Download Rheem 10NBRJR Troubleshooting guide

26
25.98
24.95
22.39
21.01
41
42
43
44
1190
1117
1002
962
925
887
855
816
80 Plus
Heat
Value at
25,000
25,000
44
43
42
41
40
39
38
37
0-999
24,000
44
43
42
41
40
39
38
37
1000-1999
23,000
45
44
42
42
41
40
39
38
2000-2999
22,000
45
44
43
42
42
41
40
39
3000-3999
21,000
45
44
43
42
42
41
41
39
4000-4999
20,000
46
45
43
43
42
42
41
40
5000-5999
19,000
47
45
44
43
43
42
42
41
6000-6999
18,000
47
46
44
44
43
43
42
42
7000-7999
17,000
48
47
45
44
44
43
43
42
8000-8999
16,000
48
47
46
45
44
44
43
43
9000-9999
ELEVATION CHART (NFG recommended orifice based on 4% derate for each 1000 foot of elevation, based on the intersection of the
orifice required at Sea Level and the elevation required below)
Divide the individual burner capacity (25,000 for 80 plus) by the Heat Value for the site to determine the Cubic Foot value at Sea Level, or divide burner capacity by the Cubic
Foot value for the Heat Value. Once you have either the Cubic Foot Value or the Heat Value you can estimate the Sea Level orifice for the site. To select the corresponding
high altitude orifice, locate the site elevation on the chart above and the orifice required at Sea Level from your calculation in the first column. The correct high
altitude orifice that must be installed in each individual burner is the intersection of these two points on the chart above.
NOTE:
Heat Value at Sea Level, for the location of the installation, is available from the Natural Gas Supplier to that site. Orifices for all altitudes are based on Sea Level values.
All calculations are performed by using the first three columns of information only. Before beginning any calculations, determine the individual burner Btu size
and heating value at Sea Level for the installation site. Each value shown in the Heat Value column is per burner at 3.5" W.C.
Final Firing Rate per Burner
28.2
27.03
29.25
38
40
30.63
37
39
Sea Level
Cubic
Foot at
3.5" W.C.
Sea Level
Orifice
Size
NATURAL GAS QUICK REFERENCE CHART FOR ORIFICE SELECTION, AT 3.5" W.C. AND APPROXIMATE FINAL FIRING RATES
80 Plus Models with 25,000 Btu's per Burner
SUPPLEMENTAL ORIFICE SIZE CHART
TABLE 8