Continued) – Sterling QVSD User Manual
Page 18
18
PIPE INSTALLATION
(Continued)
Table 7 - Gas Supply Pressure Requirements
Heating Value
Natural Gas
Propane Gas
1075 Btu/Ft
3
2500
Btu/Ft
3
(40.1 MJ/m
3
) (93.1
MJ/m
3
)
Manifold Pressure
Single Stage Application
3.5 in. WC
10.0 in. WC
(0.87 kPa)
(2.49 kPa)
Two Stage Application - High Fire
3.5 in. WC
10.0 in. WC
(0.87 kPa)
(2.49 kPa)
Two Stage Application - Low Fire
1.1 in. WC
3.8 in. WC
(0.27 kPa)
(0.95 kPa)
Modulating Application - High Fire
3.5 in. WC
10.0 in. WC
(0.87 kPa)
(2.49 kPa)
Modulating Application - Low Fire
0.9 in. WC
3.5 in. WC
(0.22 kPa)
(0.87 kPa)
Minimum Supply Pressure
Single Stage Application
5.0 in. WC
11.0 in. WC
(1.24 kPa)
(2.74 kPa)
Two Stage Application
6.5 in. WC
11.5 in. WC
(1.62 kPa)
(2.86 kPa)
Modulating Application
6.5 in. WC
11.5 in. WC
(1.62 kPa)
(2.86 kPa)
Maximum Supply Pressure
14.0 in. WC
14.0 in. WC
(3.49 kPa)
(3.49 kPa)