Buderus Logano plus GB312 Applications Manual page 32

  _
100
40
90
91
NOTE:
• The minimum gas supply pressure is 3.5"WC.
Fig. 22 Gas valve VR4730, gas connecting pipe GB312 US
Supply
Connection
at Boiler
Item
Description
no.
210 Low water cut-off SAFGARD 3/4"M
240 High temperature cut-off 3/4"M
Fig. 23 Boiler Supply Manifold and Controls.
20
60
40
61
50
62
50
80
81
Low Pressure (L.P.) Switch location
Setpoint = 3"WC Nat. Gas.
7747101926-02-Gasarmatur VR4730, Gasanschlussrohr VM312 US
240
Gasket
(typical)
550
L4006E1109
20
50
70
40
Pressure Relief
Mating Flange
Valve
2½" NPT female
50 psig
connection
Check Valve
Supply Manifold
210
Buderus
part number
GB312 Applications Manual
20
30
10
40
50
30