Bryant 351DAS Installation, Start-Up & Operating Instructions page 24

TABLE 9—MODEL 351DAS ORIFICE SIZE AND MANIFOLD PRESSURE FOR CORRECT INPUT
(TABULATED DATA BASED ON 20,000 BTUH PER BURNER, DERATED 2 PERCENT FOR EACH 1000 FT ABOVE SEA LEVEL)
AVG GAS
ALTITUDE
HEAT VALUE
RANGE
AT ALTITUDE
(FT)
(BTU/CU FT)
850
875
900
0 925
950
to 975
1000
2000 1025
1050
1075
1100
AVG GAS
ALTITUDE
HEAT VALUE
RANGE
AT ALTITUDE
(FT)
(BTU/CU FT)
U.S.A. 775
Altitudes 800
2001 825
to 850
3000 875
or 900
Canada 925
Altitudes 950
2000 975
to 1000
4500 1025
AVG GAS
ALTITUDE
HEAT VALUE
RANGE
AT ALTITUDE
(FT)
(BTU/CU FT)
750
775
800
3001 825
850
to 875
900
4000 925
950
975
1000
FOR USE WITH 080 SIZE FURNACES USING NATURAL GAS
0.58 0.60
Orifice Manifold Orifice
No. Pressure No.
43 3.7 43
43 3.5 43
44 3.7 43
44 3.5 44
44 3.4 44
44 3.2 44
45 3.7 45
45 3.5 45
45 3.3 45
45 3.2 45
47 3.6 47
0.58 0.60
Orifice Manifold Orifice
No. Pressure No.
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 3.7 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 3.7 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
SPECIFIC GRAVITY OF NATURAL GAS
0.62
Manifold Orifice Manifold
Pressure No. Pressure
3.8 42 3.2
3.6 43 3.7
3.4 43 3.5
3.7 44 3.8
3.5 44 3.6
3.3 44 3.4
3.8 44 3.2
3.6 45 3.7
3.4 45 3.6
3.3 45 3.4
3.7 45 3.2
SPECIFIC GRAVITY OF NATURAL GAS
0.62
Manifold Orifice Manifold
Pressure No. Pressure
3.2 42 3.3
3.7 43 3.8
3.4 43 3.6
3.7 44 3.8
3.5 44 3.6
3.3 44 3.4
3.8 44 3.2
3.6 45 3.7
3.4 45 3.5
3.2 45 3.4
3.1 45 3.2
SPECIFIC GRAVITY OF NATURAL GAS
0.62
Manifold Orifice Manifold
Pressure No. Pressure
3.8 42 3.3
3.6 43 3.7
3.4 43 3.5
3.6 44 3.8
3.4 44 3.5
3.2 44 3.3
3.7 45 3.8
3.5 45 3.6
3.3 45 3.4
3.2 45 3.3
3.0 45 3.1
—24—
0.64 0.66
Orifice Manifold Orifice
No. Pressure No.
42 3.3 42
43 3.8 42
43 3.6 43
43 3.4 43
44 3.7 44
44 3.5 44
44 3.4 44
44 3.2 44
45 3.7 45
45 3.5 45
45 3.4 45
0.64 0.66
Orifice Manifold Orifice
No. Pressure No.
42 3.4 42
42 3.2 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 3.5 45
45 3.3 45
0.64 0.66
Orifice Manifold Orifice
No. Pressure No.
42 3.4 42
43 3.8 42
43 3.6 43
43 3.4 43
44 3.7 44
44 3.5 44
44 3.3 44
45 3.7 44
45 3.5 45
45 3.4 45
45 3.2 45
Manifold
Pressure
3.4
3.2
3.7
3.5
3.8
3.6
3.5
3.3
3.8
3.6
3.5
Manifold
Pressure
3.5
3.3
3.8
3.6
3.4
3.6
3.4
3.3
3.8
3.6
3.4
Manifold
Pressure
3.5
3.2
3.7
3.5
3.8
3.6
3.4
3.2
3.7
3.5
3.3