39
A1009341-664Y8300 • B
The drain valve is located underneath and
the front cover of the base needs to be
removed to get access to it.
1
2
DRAINING THE APPLIANCE
Essential recommendations for safety
• Before draining the DHW tank, drain the primary circuit or bring its pressure to 0 bar.
• Water flowing out of the drain valve may be extremely hot and could cause severe scalding. Keep people
away from the hot water discharge.
Set-up conditions
•
Water heater switched off using the ON/OFF mas-
ter switch
•
External power supply isolated
•
Gas supply closed
Primary circuit draining procedure
1. Make sure the isolating valve (
1
) is closed.
2. Connect the drain valve (
2
) to the sewer with a
hose.
3. Open the drain valve (
2
) to empty the primary cir-
cuit of the water heater.
4. Close the drain valve (
2
) once the primary circuit of
the water heater is empty.
DRAINING THE BOILER
Essential instructions for safety
• Before draining the DHW tank, drain the heating (primary) circuit or bring its pressure to 0 bar.
• Water flowing out of the drain valve may be extremely hot and could cause severe scalding. Keep
people away from the hot water discharge.
Set-up conditions
• Boiler switched off using the ON/OFF master
switch
• External power supply isolated
• Fuel/gas supply closed
Heating circuit draining procedure
1. Close the isolating valves (
1
).
2. Connect the drain valve (
2
) to the sewer with a hose.
3. Open the drain valve (
2
) to empty the heating circuit
of the boiler.
4. Close the drain valve (
2
) once the heating circuit of
the boiler is empty.
DHW circuit draining procedure
Before draining the DHW tank, make sure
that the heating (primary) circuit pressure is
null.
1. Open fully a draw-off tap (
3
) for about 60 minutes
to make sure that the DHW tank has cooled down.
2. Close the isolating valves (
1
).
3. Connect the drain valve (
2
) to the sewer with a
hose.
4. Open the drain valve (
2
) and drain the DHW tank
water to the sewer.
5. Open the draw-off tap (
3
) to accelerate the
draining process. If it is located lower than the
tank connection, open a draw-off tap located
higher in the system.
6. Close the drain valve (
2
) and the draw-off tap (
3
)
once the DHW tank of the boiler is empty.
Cold water
Hot water
1
1
2
1
2
3
EN
Maintenance
Summary of Contents for WaterMaster 120 Evo
Page 48: ...ACV International Oude Vijverweg 6 B 1653 Dworp Belgium belgium service acv com www acv com...
Page 49: ...A1009341_664Y8300 B WaterMaster 25 35 45 70 85 120 Evo 25 45 70 X Evo ML...
Page 57: ...9 x4 x4 x4 1 2 x2 ML...
Page 59: ...11 x7 WM 25 35 45 Evo x9 WM25X 45X 70 85 120Evo x11 WM 70 X Evo x3 x2 ML...
Page 60: ...12 WaterMaster 70 X Evo x4 ML...
Page 61: ...13 6 3 2 1 x4 x4 WaterMaster 25 X 35 45 X 70 85 120 Evo ML...
Page 75: ...31 ML...
Page 76: ...ACV International Oude Vijverweg 6 B 1653 Dworp Belgium belgium service acv com www acv com...
