Payne PG8MVA Installation Instructions Manual page 42

Table 12 – Orifice Size and Manifold Pressure (In. W.C.) for Gas Input Rate
(Tabulated Data Based on 22,000 Btuh High- -Heat/14,500 Btuh for Low- -Heat per Burner, Derated 4 Percent for Each 1000 Ft.
AVG. GAS
ALTITUDE RANGE
HEAT VALUE
FT. (M)
(BTUH/CU FT.)
900
925
950
975
0 to
USA 2000 1000
(0 to 610)
1025
1050
1075
1100
AVG. GAS
ALTITUDE RANGE
HEAT VALUE
FT. (M)
(BTUH/CU FT.)
800
825
850
2001 to 875
3000 (610
USA 900
to 914)
925
950
975
1000
AVG. GAS
ALTITUDE RANGE
HEAT VALUE
FT. (M)
(BTUH/CU FT.)
775
800
825
3001 to
4000 850
USA
(914 to
875
1219)
900
925
950
ALTITUDE RANGE
AVG. GAS
FT. (M)
HEAT VALUE
(BTUH/CU FT.)
750
775
800
4001 to
825
5000
USA
(1219 to 850
1524)
875
900
925
* Orifice numbers 43 are factory installed
(305 M) Above Sea Level)
SPECIFIC GRAVITY OF NATURAL GAS
0.58
Manifold
Orifice Orifice
Pressure
No. No.
High/Low
42 3.5/1.5 42
42 3.3/1.4 42
43 3.8/1.7 42
43 3.6/1.6 43
43 3.5/1.5 43
43 3.3/1.4 43
44 3.6/1.6 43
44 3.4/1.5 44
44 3.3/1.4 44
SPECIFIC GRAVITY OF NATURAL GAS
0.58
Manifold
Orifice Orifice
Pressure
No. No.
High/Low
42 3.4/1.5 42
42 3.2/1.4 42
43 3.7/1.6 43
43 3.5/1.5 43
43 3.3/1.4 43
44 3.5/1.5 43
44 3.4/1.5 44
44 3.2/1.4 44
45 3.7/1.6 45
SPECIFIC GRAVITY OF NATURAL GAS
0.58
Manifold
Orifice Orifice
Pressure
No. No.
High/Low
42 3.2/1.4 42
43 3.6/1.6 43
43 3.4/1.5 43
43 3.2/1.4 43
44 3.5/1.5 44
44 3.3/1.4 44
45 3.8/1.6 44
46 3.8/1.6 45
SPECIFIC GRAVITY OF NATURAL GAS
0.58
Manifold
Orifice Orifice
Pressure
No. No.
High/Low
43 3.6/1.6 43
43 3.4/1.5 43
43 3.2/1.4 43
44 3.4/1.5 44
44 3.2/1.4 44
45 3.7/1.6 45
46 3.7/1.6 46
46 3.5/1.5 46
42
0.60 0.62
Manifold Manifold
Orifice
Pressure Pressure
No.
High/Low High/Low
3.6/1.6 42 3.7/1.6
3.4/1.5 42 3.5/1.5
3.3/1.4 42 3.4/1.5
3.8/1.6 42 3.2/1.4
3.6/1.6 43 3.7/1.6
3.4/1.5 43 3.5/1.5
3.2/1.4 43 3.4/1.5
3.5/1.5 43 3.2/1.4
3.4/1.5 44 3.5/1.5
0.60 0.62
Manifold
Manifold
Orifice
Pressure
Pressure
No.
High/Low
High/Low
3.5/1.5 42 3.6/1.6
3.3/1.4 42 3.4/1.5
3.8/1.6 42 3.2/1.4
3.6/1.6 43 3.7/1.6
3.4/1.5 43 3.5/1.5
3.2/1.4 43 3.3/1.4
3.5/1.5 44 3.6/1.6
3.3/1.4 44 3.4/1.5
3.8/1.7 44 3.2/1.4
0.60 0.62
Manifold
Manifold
Orifice
Pressure
Pressure
No.
High/Low
High/Low
3.3/1.4 42 3.4/1.5
3.8/1.6 42 3.2/1.4
3.5/1.5 43 3.7/1.6
3.3/1.4 43 3.4/1.5
3.6/1.6 43 3.3/1.4
3.4/1.5 44 3.5/1.5
3.2/1.4 44 3.3/1.5
3.7/1.6 45 3.8/1.7
0.60 0.62
Manifold
Manifold
Orifice Pressure
Pressure
No. High/Low
High/Low
3.8/1.6 42 3.2/1.4
3.5/1.5 43 3.6/1.6
3.3/1.4 43 3.4/1.5
3.6/1.5 43 3.2/1.4
3.4/1.5 44 3.5/1.5
3.8/1.7 44 3.3/1.4
3.8/1.7 45 3.7/1.6
3.6/1.6 46 3.7/1.6
0.64
Manifold
Orifice
Pressure
No.
High/Low
41 3.5/1.5
42 3.7/1.6
42 3.5/1.5
42 3.3/1.4
43 3.8/1.7
43 3.6/1.6
43 3.5/1.5
43 3.3/1.4
43 3.2/1.4
0.64
Manifold
Orifice
Pressure
No.
High/Low
42 3.7/1.6
42 3.5/1.5
42 3.3/1.4
43 3.8/1.7
43 3.6/1.6
43 3.4/1.5
43 3.2/1.4
44 3.5/1.5
44 3.4/1.5
0.64
Manifold
Orifice
Pressure
No.
High/Low
42 3.5/1.5
42 3.3/1.4
43 3.8/1.6
43 3.6/1.5
43 3.4/1.5
43 3.2/1.4
44 3.4/1.5
44 3.3/1.4
0.64
Manifold
Orifice
Pressure
No.
High/Low
42 3.3/1.4
43 3.8/1.6
43 3.5/1.5
43 3.3/1.4
44 3.6/1.6
44 3.4/1.5
44 3.2/1.4
46 3.8/1.7