Buderus LOGANO PLUS GB312 Installation Instructions Manual page 48

9
Heating system inspection
▶ Check all joints on the gas valve for leaks using a suitable leak
detecting agent.
Turn on the gas isolating valve D on the outlet side of the gas valve
again. Reset the boiler to normal operating mode.
Fig. 71 Testing apparatus set-up for gas valve leak testing
[A] Main isolating valve on gas valve inlet side
[B] Solenoid valve 1
[C] Solenoid valve 2
[D] Gas isolating valve on gas valve outlet side
[E] Manual isolating valve (testing apparatus)
[F] Manual isolating valve (testing apparatus)
[G] Hand pump (testing apparatus)
[H] Pressure tester (testing apparatus)
[I] Low pressure switch (available separately)
[1, 2, 3, 4, P]Pressure testing points
48
2
A
1
B
2
I
Ø1/4"
1/2"
F
3
P
C
P
3
Ø1/4"
E
1/2"
Logano plus GB312 – 6 720 647 367 (2012/11)
H
G
D
4
E
7747010720-87.02RS