EN • 10
661Y0400.F
ENGLISH
FRANCAIS
NEDERLANDS
ESP
AÑOL
IT
ALIANO
РУ
ССКИЙ
DEUTSCH
MAINTENANCE
Domestic hot water tank
To empty the domestic hot water tank:
1. Switch off the electrical power supply to the tank.
2. Close the isolation valve [
1
].
3. Open the drain cock [
6
] and the air vent [
7
].
4. Allow the water to flow out into the drain.
5. After emptying, return the valves to their initial positions.
In order to allow emptying the valve
[
6
]
must be located
at the lowest point on the tank.
2
7
5
1
1
4
10
6
1
3
9
1
1
3
3
1
8
11
5
5
5
5
1
8
10
4
2
3
6
7
Central heating tank
To empty off the primary circuit:
1. Switch off the electrical power supply to the tank.
2. Close the shut-off valves [
5
] on the primary circuit.
3. Connect a hose to the drain valve [
4
].
4. Open the drain valve [
4
] and drain the hot water off.
5. To speed up the process, open the air vent located on the
upper part of the tank.
6. When the emptying is finished, close the drain cock again
then screw the air valve up again.
PERIODIC CHECKS BY THE USER
• Check the pressure of the boiler’s pressure gauge: it should
be between 0.5 and 1.5 bar.
• Carry out a monthly visual inspection of the valves,
connections and accessories in order to detect any leaks
or malfunctions.
• Periodically check the air valve located on the upper part of
the tank to make sure that it is not leaking.
• If you notice anything unusual, contact a technician or your
heating engineer.
ANNUAL SERVICE
The annual service, carried out by a technician, must include
the following:
• Checking the air valve:
The air bleed can lead to water being added to the system.
Check the pressure on the boiler’s pressure gauge.
• Manually activate the domestic hot water safety valve once
a year. This operation will lead to a discharge of hot water.
Before drawing any hot water through the safety unit,
make sure that the discharge goes directly to the drain
in order to avoid any risk of burning or damage.
• The discharge pipe should be open to the atmosphere.
• If the safety unit occasionally “drips” this may be due to an
expansion problem or to clogging of the valve.
• Follow the circulator’s maintenance instructions.
• Check that the valves, cocks, controllers and any electrical
accessories installed are working properly
(see the
manufacturer’s instructions if necessary)
.
REPLACEMENT OF THE ELECTRIC HEATING
ELEMENT FOR THE HLE
• Switch off and disconnect the mains power supply to the
appliance.
• Drain the primary tank.
EMPTYING
Recommendations
Empty the tank if it is to be switched off for the winter
and there is a risk of frost conditions exposure.
If the central heating water (primary circuit) contains
any antifreeze, only the domestic hot water should be
drained.
Before draining off the domestic hot water, insulate
the tank to bring the central heating pressure (primary
circuit) down to 1 bar, in order to protect the tank
against a risk of collapsing.
If the central heating circuit does not contain any anti-
freeze, both the central heating and hot water circuits
should be drained.
