39
TABLE 12—ORIFICE SIZE* AND MANIFOLD PRESSURE FOR GAS INPUT RATE
(TABULATED DATA BASED ON 22,000 BTUH PER BURNER, DERATED 4 PERCENT FOR EACH 1000 FT. ABOVE SEA
LEVEL)
ALTITUDE RANGE
(FT.)
AVG.. GAS
HEAT VALUE
(BTUH/CU
FT.)
SPECIFIC GRAVITY OF NATURAL GAS
0.58
0.60
0.62
0.64
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
U.S.A.
and
Canada
0 to
2000
900
42
3.5
42
3.6
42
3.7
41
3.5
925
42
3.3
42
3.4
42
3.5
42
3.7
950
43
3.8
42
3.3
42
3.4
42
3.5
975
43
3.6
43
3.8
42
3.2
42
3.3
1000
43
3.5
43
3.6
43
3.7
43
3.8
1025
43
3.3
43
3.4
43
3.5
43
3.6
1050
44
3.6
43
3.2
43
3.4
43
3.5
1075
44
3.4
44
3.5
43
3.2
43
3.3
1100
44
3.3
44
3.4
44
3.5
43
3.2
ALTITUDE RANGE
(FT.)
AVG.. GAS
HEAT VALUE
(BTUH/CU
FT.)
SPECIFIC GRAVITY OF NATURAL GAS
0.58
0.60
0.62
0.64
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
U.S.A.
and
Canada
U.S.A.
Altitudes
2001 to
3000 or
Canada
Altitudes
2000 to
4500
800
42
3.4
42
3.5
42
3.6
42
3.7
825
42
3.2
42
3.3
42
3.4
42
3.5
850
43
3.7
43
3.8
42
3.2
42
3.3
875
43
3.5
43
3.6
43
3.7
43
3.8
900
43
3.3
43
3.4
43
3.5
43
3.6
925
43
3.1
43
3.2
43
3.3
43
3.4
950
43
2.9
43
3.0
43
3.1
43
3.2
975
43
2.8
43
2.9
43
3.0
43
3.1
1000
43
2.6
43
2.7
43
2.8
43
2.9
ALTITUDE RANGE
(FT.)
AVG. GAS
HEAT VALUE
(BTU/CU FT.)
SPECIFIC GRAVITY OF NATURAL GAS
0.58
0.60
0.62
0.64
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
U.S.A.
Only
3001 to
4000
775
42
3.2
42
3.3
42
3.4
42
3.5
800
43
3.6
43
3.8
42
3.2
42
3.3
825
43
3.4
43
3.5
43
3.7
43
3.8
850
43
3.2
43
3.3
43
3.4
43
3.6
875
43
3.0
43
3.1
43
3.3
43
3.4
900
43
2.9
43
3.0
43
3.1
43
3.2
925
43
2.7
43
2.8
43
2.9
43
3.0
950
43
2.6
43
2.7
43
2.8
43
2.8
ALTITUDE RANGE
(FT.)
AVG. GAS
HEAT VALUE
(BTU/CU FT.)
SPECIFIC GRAVITY OF NATURAL GAS
0.58
0.60
0.62
0.64
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
U.S.A.
Only
4001 to
5000
750
43
3.6
43
3.8
42
3.2
42
3.3
775
43
3.4
43
3.5
43
3.6
43
3.8
800
43
3.2
43
3.3
43
3.4
43
3.5
825
43
3.0
43
3.1
43
3.2
43
3.3
850
43
2.8
43
2.9
43
3.0
43
3.1
875
43
2.7
43
2.8
43
2.9
43
2.9
900
43
2.5
43
2.6
43
2.7
43
2.8
925
43
2.4
43
2.5
43
2.6
43
2.6
* Orifice numbers 43 are factory installed.
PG
8J
/M
Содержание PG8J
Страница 36: ...36 A08411 Fig 46 Wiring Diagram PG8J M ...