Bryant D Series Installation, Start-Up, And Operating Instructions Manual page 39

TABLE 8—MODEL 340MAV ORIFICE SIZE AND MANIFOLD PRESSURE FOR CORRECT INPUT
(TABULATED DATA BASED ON 20,000 BTUH PER BURNER, DERATED 2% FOR EACH 1000 FT ABOVE SEA LEVEL)
AVG GAS
ALTITUDE
HEAT VALUE
RANGE
AT ALTITUDE
(FT)
(BTU/CU FT)
725
750
775
4001 800
825
to 850
875
5000 900
925
950
AVG GAS
ALTITUDE
HEAT VALUE
RANGE
AT ALTITUDE
(FT)
(BTU/CU FT)
700
725
750
775
5001 800
825
to 850
875
6000 900
925
950
975
1000
AVG GAS
ALTITUDE
HEAT VALUE
RANGE
AT ALTITUDE
(FT)
(BTU/CU FT)
650
675
700
6001 725
750
to 775
800
7000 825
850
875
*Orifice numbers shown in BOLD are factory installed.
FOR USE WITH 040 THROUGH 120 SIZE FURNACES ONLY
0.58 0.60
Orifice Manifold Orifice
No. Pressure No.
43 3.7 43
43 3.4 43
44 3.7 44
44 3.5 44
44 3.2 44
45 3.7 45
45 3.5 45
45 3.3 45
45 3.1 45
45 3.0 45
0.58 0.60
Orifice Manifold Orifice
No. Pressure No.
43 3.6 43
43 3.4 43
44 3.6 44
44 3.4 44
44 3.2 44
45 3.6 45
45 3.4 45
45 3.2 45
45 3.0 45
45 2.9 45
45 2.7 45
45 2.6 45
45 2.5 45
0.58 0.60
Orifice Manifold Orifice
No. Pressure No.
42 3.2 42
43 3.6 43
44 3.8 43
44 3.6 44
44 3.3 44
45 3.8 44
45 3.5 45
45 3.3 45
45 3.1 45
45 3.0 45
—39—
SPECIFIC GRAVITY OF NATURAL GAS
0.62
Manifold Orifice Manifold
Pressure No. Pressure
3.8 42 3.2
3.5 43 3.7
3.8 43 3.4
3.6 44 3.7
3.4 44 3.5
3.8 44 3.3
3.6 45 3.7
3.4 45 3.5
3.2 45 3.3
3.1 45 3.2
SPECIFIC GRAVITY OF NATURAL GAS
0.62
Manifold Orifice Manifold
Pressure No. Pressure
3.7 42 3.2
3.5 43 3.6
3.7 43 3.4
3.5 44 3.6
3.3 44 3.4
3.7 44 3.2
3.5 45 3.6
3.3 45 3.4
3.1 45 3.3
3.0 45 3.1
2.8 45 2.9
2.7 45 2.8
2.5 45 2.6
SPECIFIC GRAVITY OF NATURAL GAS
0.62
Manifold Orifice Manifold
Pressure No. Pressure
3.3 42 3.4
3.7 43 3.8
3.4 43 3.6
3.7 44 3.8
3.4 44 3.6
3.2 44 3.3
3.7 45 3.8
3.4 45 3.6
3.2 45 3.4
3.1 45 3.2
(Continued)
0.64 0.66
Orifice Manifold Orifice
No. Pressure No.
42 3.3 42
43 3.8 42
43 3.5 43
44 3.8 43
44 3.6 44
44 3.4 44
44 3.2 44
45 3.6 45
45 3.4 45
45 3.3 45
0.64 0.66
Orifice Manifold Orifice
No. Pressure No.
42 3.3 42
43 3.7 43
43 3.5 43
44 3.7 43
44 3.5 44
44 3.3 44
45 3.8 44
45 3.6 45
45 3.4 45
45 3.2 45
45 3.0 45
45 2.9 45
45 2.7 45
0.64 0.66
Orifice Manifold Orifice
No. Pressure No.
42 3.5 42
42 3.2 42
43 3.7 43
43 3.4 43
44 3.7 44
44 3.4 44
44 3.2 44
45 3.7 45
45 3.5 45
45 3.3 45
Manifold
Pressure
3.4
3.2
3.7
3.4
3.7
3.5
3.3
3.8
3.6
3.4
Manifold
Pressure
3.4
3.8
3.6
3.4
3.6
3.4
3.2
3.7
3.5
3.3
3.1
2.9
2.8
Manifold
Pressure
3.6
3.3
3.8
3.5
3.8
3.5
3.3
3.8
3.6
3.4