Pipe connections
16
VVM 240
To empty the water heater proceed as follows:
■
Disconnect the overflow pipe from the drain con-
nection (79) and connect a hose to a draining-
pump instead. Where no draining pump is avail-
able, the water can be released into the overflow
cup (99).
■
Open the safety valve (47).
■
Open a hot water tap to let air into the system. If
this is not enough, undo a pipe coupling (74) on
the hot water side and pull out the pipe.
The hot water can be drained off through drain valve
(51) using an R15 (1/2") hose coupling. Remove the
cover (80) from the valve. Now screw on the hose
coupling and open valve (51).
Open safety valve (52) to let air into the system.
Draining the heating system
Emptying
the water heater
Capacity diagram, heat medium pump and charge pump
Flöde
Tillgängligt tr
yc
k, kP
a
kPa
l/h
10
200
0
0
20
400
3
0
600
40
800
50
1000
60
1200
70
1400
1600
1800
2000
l/s
0,5
0,4
0,
3
0,2
0,1
0
Max flöde: 1700 l/h
Flow
Max. flow 1700 l/h
Available pressure kPa
