Frost Protection; Start-Up - Servicing - Wolf SEM-2 Instructions De Montage

Start-up

Frost protection

Maintenance of
magnesium anode
Flange
Fault
Leakage at floor-standing hot water tank
Heating-up time too long
Service water temperature too low
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Start-up - Servicing

The installation and first start-up may be performed only by a recognised installation
company.
Flush pipes and tank thoroughly after installation, fill tank with water. Open hot water
tap until water runs out and check safety valve by introducing air.
It is essential to fill and completely bleed tank before the first start-up!
Warning: Max. operating pressure of 10 bar must not be exceeded!
Exceeding the permissible operating pressure can lead to leaks and destruction
of the tank!
Operation with charging pump:
Adjust the tank temperature controller to the desired temperature (max. 60°C).
When connecting an electronic tank sensor, the tank temperature is set at the boiler
control.
Operation with the electrical auxiliary heating system E2 / E4.5 / E6
Set tank temperature controller of the heating control to 20°C.
Turn the tank temperature controller of the electrical auxiliary heating system to
desired temperature (60°C max).
To save energy in the event of longer absence, the tank temperature controller can
be turned completely to the left (counter-clockwise); the frost protection function is
maintained.
The unit must be checked by a professional company every 2 years.
In case of a built-in magnesium anode, the protective effect is based on an electrochemical
reaction, which results in a decomposition of the magnesium. When the magnesium
anode is worn out, the corrosion protection of the tank is no longer ensured! The
result: corrosion perforation, water leakage. Therefore it must be checked every
2 years and replaced in case of more than 2/3 wear by a qualified technician!
When changing the anode, the tank pressure must be relieved.
Close cold water connection, switch off circulating pump and open any hot water tap
in the house.
When emptying the system, hot water may escape and cause injuries, particularly
scalding!
When using a built-in impressed-current anode, no servicing is required.
After disassembly of the flange, the seal must be replaced upon re-installation; tighte-
Warning
ning torque for the nuts 20-25 Nm.
Cause
Flange leaking
Pipe connections leaking
Hot water temperature too low (measure at
the supply of floor-standing hot water tank,
not at the boiler)
Heating water amount too small (causes
large spreading, i.e. return temperature
too low)
Heating coil does not bleed
Calcification of heating surface
Thermostat switches off too early
Return temperature too low (e.g. excessive
spreading)
Remedy
Tighten the screws diagonally with
20-25 Nm;
replace the seal
Re-seal
Increase temperature (adjust controller)
Larger pump
Observe back pressure of parallel heater
circuit
Bleed repeatedly with switched-off pump
Decalcify heating surface
Reset thermostat
Larger charging pump
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