Buderus Logano plus GB312 Applications Manual page 9

GB312 Applications Manual
100
10
y
1
x
Fig. 4 Primary circuit flow resistance, GB312 with check valve
x Flow rate in gal/min (GPM)
y Primary pressure drop in psi
Boiler rating
9 0 - 4
120 - 4
1 6 0 - 5
200 - 6
2 4 0 - 7
280 - 8
Tab. 3 Gas flow rate (based on gas temperature of 60 °F and air pressure of 30 in. Hg)
The boiler is factory-set for: – Natural gas
Note:
•
•
1 0
Gas flow rate
Natural gas
3
Calorific value 1075 BTU/ft
cu ft/hr
3 2 4 6 .
434.4 434.4
5 7 9 0 .
720.6 720.6
8 6 8 8 .
1013.4
1013.4
1 0 0
_
90-4
120-4
160-5
200-6
240-7
280-8
1 0 0 0
7 747 010 720-30.1RS