Benchmark Metropolis DGT 25 BF Installation And Servicing Instrucnion page 21

(+)
PRESSURE SWITCH
PRESSOSTATO
C
A
SEALED CHAMBER
CAMERA STAGNA
(--)
REFERENCE POSITION BY-PASS
RIFERIMENTO POSIZIONE BY-PASS
E
FAN
VENTILATORE
D
KEY
A By-pass on
B By-pass off
C Water pressure valve
D Automatic air vent
E Drain vent
B
ENG
IT
ES
Fig. 14
Fig. 15
21