Bryant 310AAV - page 39

39
Table15—OrificeSize* and Manifold Pressure(In. W.C.) for Gas Input Rate
(Tabulateddata basedon 22,000 btuh per burner,derated 4 percentfor each 1000 ft. (305 M) abovesea level)
ALTITUDERANGE
FT.(M)
AVG.GAS
HEATVALUE
ATALTITUDE
(BTU/CU FT.)
SPECIFICGRAVITY 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.
0to
2000
(0to
610)
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
U.S.A.
2001to
3000
(610to
914)
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
U.S.A.
3001to
4000
(914to
1219)
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
U.S.A.
4001to
5000
(1219to
1524)
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 factoryinstalled.
310AAV