Bryant 395CAV - Manual (Page 14)

TABLE 6—MODEL 395CAV ORIFICE SIZE* AND MANIFOLD PRESSURE FOR CORRECT INPUT
(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
(BTU/CU FT)
SPECIFIC GRAVITY OF NATURAL GAS
0.58 0.60 0.62 0.64 0.66
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
U.S.A.
and
Canada 0
to
2000
850 42 3.6 42 3.8 41 3.5 41 3.6 41 3.7
875 42 3.4 42 3.6 42 3.7 42 3.8 41 3.5
900 42 3.2 42 3.4 42 3.5 42 3.6 42 3.7
925 43 3.7 42 3.2 42 3.3 42 3.4 42 3.5
950 43 3.6 43 3.7 43 3.8 42 3.2 42 3.3
975 43 3.4 43 3.5 43 3.6 43 3.7 43 3.8
1000 43 3.2 43 3.3 43 3.4 43 3.5 43 3.6
1025 44 3.5 43 3.2 43 3.3 43 3.4 43 3.5
1050 44 3.3 44 3.4 44 3.6 43 3.2 43 3.3
1075 45 3.8 44 3.3 44 3.4 44 3.5 43 3.2
1100 45 3.7 45 3.8 44 3.2 44 3.4 44 3.5
ALTITUDE
RANGE
(FT)
AVG GAS
HEAT VALUE
(BTU/CU FT)
SPECIFIC GRAVITY OF NATURAL GAS
0.58 0.60 0.62 0.64 0.66
Orifice
No.
Manifold
Pressure
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
775 42 3.4 42 3.5 42 3.6 42 3.7 42 3.8
800 43 3.8 42 3.3 42 3.4 42 3.5 42 3.6
825 43 3.6 43 3.7 42 3.2 42 3.3 42 3.4
850 43 3.4 43 3.5 43 3.6 43 3.8 42 3.2
875 43 3.2 43 3.3 43 3.4 43 3.5 43 3.6
900 43 3.0 43 3.1 43 3.2 43 3.3 43 3.4
925 43 2.9 43 3.0 43 3.1 43 3.2 43 3.3
950 43 2.7 43 2.8 43 2.9 43 3.0 43 3.1
975 43 2.6 43 2.7 43 2.8 43 2.9 43 2.9
1000 43 2.5 43 2.5 43 2.6 43 2.7 43 2.8
1025 43 2.3 43 2.4 43 2.5 43 2.6 43 2.7
ALTITUDE
RANGE
(FT)
AVG GAS
HEAT VALUE
(BTU/CU FT)
SPECIFIC GRAVITY OF NATURAL GAS
0.58 0.60 0.62 0.64 0.66
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
U.S.A.
Only 3001
to
4000
750 43 3.8 42 3.3 42 3.4 42 3.5 42 3.6
775 43 3.6 43 3.7 43 3.8 42 3.3 42 3.4
800 43 3.4 43 3.5 43 3.6 43 3.7 43 3.8
825 43 3.2 43 3.3 43 3.4 43 3.5 43 3.6
850 43 3.0 43 3.1 43 3.2 43 3.3 43 3.4
875 43 2.8 43 2.9 43 3.0 43 3.1 43 3.2
900 43 2.7 43 2.8 43 2.9 43 2.9 43 3.0
925 43 2.5 43 2.6 43 2.7 43 2.8 43 2.9
950 43 2.4 43 2.5 43 2.6 43 2.6 43 2.7
975 43 2.3 43 2.4 43 2.4 43 2.5 43 2.6
1000 43 2.2 43 2.2 43 2.3 43 2.4 43 2.5
ALTITUDE
RANGE
(FT)
AVG GAS
HEAT VALUE
(BTU/CU FT)
SPECIFIC GRAVITY OF NATURAL GAS
0.58 0.60 0.62 0.64 0.66
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
U.S.A.
Only 4001
to
5000
725 43 3.6 43 3.7 42 3.2 42 3.3 42 3.4
750 43 3.4 43 3.5 43 3.6 43 3.7 43 3.8
775 43 3.2 43 3.3 43 3.4 43 3.5 43 3.6
800 43 3.0 43 3.1 43 3.2 43 3.3 43 3.4
825 43 2.8 43 2.9 43 3.0 43 3.1 43 3.2
850 43 2.6 43 2.7 43 2.8 43 2.9 43 3.0
875 43 2.5 43 2.6 43 2.6 43 2.7 43 2.8
900 43 2.3 43 2.4 43 2.5 43 2.6 43 2.7
925 43 2.2 43 2.3 43 2.4 43 2.4 43 2.5
950 43 2.1 43 2.2 43 2.2 43 2.3 43 2.4
* Orifice numbers shown in shading are factory installed
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