Payne PG8MVA Installation Instructions Manual page 44

Table 13 – Orifice Size and Manifold Pressure (In. W.C.) for Gas Input Rate
(Tabulated Data Based on 21,000 Btuh High- -Heat/14,500 Btuh for Low- -Heat Per Burner, Derated 4 Percent for Each 1000 Ft.
AVG. GAS
HEAT VALUE
ALTITUDE RANGE
(BTUH/CU
FT. (M)
FT.)
900
925
950
0 to
975
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
USA 3000 (610 900
925
to 914)
950
975
1000
AVG. GAS
ALTITUDE RANGE
HEAT VALUE
FT. (M)
(BTUH/CU FT.)
775
800
825
3001 to
850
4000 (914
USA
875
to 1219)
900
925
950
AVG. GAS
ALTITUDE RANGE
HEAT VALUE
FT. (M)
(BTUH/CU FT.)
750
775
4001 to
800
5000
825
USA
(1219 to 850
875
1524)
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 3.2/1.5 42
43 3.7/1.8 43
43 3.5/1.7 43
43 3.3/1.6 43
44 3.6/1.7 43
44 3.4/1.6 44
44 3.3/1.6 44
45 3.8/1.8 44
46 3.8/1.8 45
SPECIFIC GRAVITY OF NATURAL GAS
0.58
Manifold
Orifice Orifice
Pressure
No. No.
High/Low
43 3.8/1.8 42
43 3.5/1.7 43
43 3.3/1.6 43
43 3.2/1.5 43
44 3.4/1.6 44
44 3.2/1.5 44
45 3.7/1.8 45
46 3.7/1.8 46
46 3.5/1.7 46
SPECIFIC GRAVITY OF NATURAL GAS
0.58
Manifold
Orifice Orifice
Pressure
No. No.
High/Low
43 3.5/1.7 43
43 3.3/1.6 43
44 3.6/1.7 43
44 3.4/1.6 44
45 3.8/1.8 44
46 3.8/1.8 45
46 3.6/1.7 46
46 3.4/1.6 46
SPECIFIC GRAVITY OF NATURAL GAS
0.58
Manifold
Orifice Orifice
Pressure
No. No.
High/Low
43 3.3/1.6 43
44 3.6/1.7 43
44 3.3/1.6 44
45 3.8/1.8 44
46 3.8/1.8 45
46 3.5/1.7 46
47 3.8/1.8 46
47 3.6/1.7 47
44
0.60 0.62
Manifold Manifold
Orifice
Pressure Pressure
No.
High/Low High/Low
3.3/1.6 42 3.4/1.6
3.8/1.8 42 3.2/1.5
3.6/1.7 43 3.7/1.8
3.4/1.6 43 3.5/1.7
3.3/1.6 43 3.4/1.6
3.6/1.7 43 3.2/1.5
3.4/1.6 44 3.5/1.7
3.2/1.5 44 3.3/1.6
3.7/1.8 44 3.2/1.5
0.60 0.62
Manifold Manifold
Orifice
Pressure Pressure
No.
High/Low High/Low
3.2/1.5 42 3.3/1.6
3.7/1.7 43 3.8/1.8
3.5/1.6 43 3.6/1.7
3.3/1.6 43 3.4/1.6
3.5/1.7 43 3.2/1.5
3.3/1.6 44 3.5/1.6
3.8/1.8 44 3.3/1.6
3.8/1.8 45 3.8/1.8
3.6/1.7 46 3.8/1.8
0.60 0.62
Manifold Manifold
Orifice
Pressure Pressure
No.
High/Low High/Low
3.7/1.7 43 3.8/1.8
3.4/1.6 43 3.5/1.7
3.2/1.5 43 3.3/1.6
3.5/1.7 44 3.6/1.7
3.3/1.6 44 3.4/1.6
3.8/1.8 44 3.2/1.5
3.7/1.8 45 3.7/1.8
3.5/1.7 46 3.7/1.7
0.60 0.62
Manifold Manifold
Orifice
Pressure Pressure
No.
High/Low High/Low
3.4/1.6 43 3.5/1.7
3.2/1.5 43 3.3/1.6
3.4/1.6 44 3.6/1.7
3.2/1.5 44 3.4/1.6
3.7/1.8 45 3.8/1.8
3.7/1.7 46 3.8/1.8
3.5/1.7 46 3.6/1.7
3.7/1.8 47 3.8/1.8
0.64
Manifold
Orifice
Pressure
No.
High/Low
42 3.5/1.7
42 3.3/1.6
43 3.8/1.8
43 3.7/1.7
43 3.5/1.7
43 3.3/1.6
43 3.2/1.5
44 3.4/1.6
44 3.3/1.6
0.64
Manifold
Orifice
Pressure
No.
High/Low
42 3.4/1.6
42 3.2/1.5
43 3.7/1.8
43 3.5/1.7
43 3.3/1.6
44 3.6/1.7
44 3.4/1.6
44 3.2/1.5
45 3.7/1.8
0.64
Manifold
Orifice
Pressure
No.
High/Low
42 3.2/1.5
43 3.7/1.7
43 3.4/1.6
43 3.2/1.5
44 3.5/1.7
44 3.3/1.6
45 3.8/1.8
46 3.8/1.8
0.64
Manifold
Orifice
Pressure
No.
High/Low
43 3.6/1.7
43 3.4/1.6
43 3.2/1.5
44 3.5/1.6
44 3.3/1.6
45 3.7/1.8
46 3.7/1.8
46 3.5/1.7