Bryant 310AAV User Manual page 42

Table 11—Orifice Size* And Manifold Pressure For Gas Input Rate (Continued)
(Tabulated Data Based On 21,000 Btuh Per Burner, Derated 4 Percent For Each 1000 Ft Above Sea Level)
AVG GAS
ALTITUDE
HEAT VALUE
RANGE
AT ALTITUDE
(FT)
(BTU/CU FT)
600
625
9001
650
to
10,000 675
700
725
* Orifice numbers 43 are factory installed
SPECIFIC GRAVITY OF NATURAL GAS
0.58
Orifice Manifold Orifice
No. Pressure No.
43 2.4 43
43 2.3 43
43 2.1 43
48 3.6 48
48 3.4 48
49 3.7 49
41
0.60 0.62
Manifold Orifice Manifold
Pressure No. Pressure
2.5 43
2.3 43
2.2 43
3.8 43
3.5 48
3.8 48
0.64
Orifice Manifold
No. Pressure
2.6 43 2.7
2.4 43 2.5
2.2 43 2.3
2.1 43 2.1
3.6 48 3.7
3.4 48 3.5