TOR
cod. 3542B750 - Rev 05 - 07/2022
16
EN
3. SERVICE AND MAINTENANCE
3.1 COMMISSIONING
B
The commissioning should be performed only by qualified personnel.
The commissioning is necessary any time the system’s and safety devices repairs are performed.
3.1.1 Before starting the electric heating unit
Open all the closing valves connecting the unit to the system.
Fill the system with water and check if the electric heating unit and the system were properly vented.
Check if there are any leakages at the heating system, at the hot water system, at the electric heating unit’s connections.
Check if the electric heating unit is connected to a proper source.
Check if the unit’s earthing is correctly connected.
Check if there are liquids or corrosive objects near the electric heating unit.
3.1.2 Starting the heating unit
Power-on the unit.
Activated in the winter mode and make sure that the contact with the room thermostat is closed. Now, the heating element
of the heat exchanger heats up. The electric heating unit starts in automatic mode being controlled by the safety devices.
A
The heating element can stop the operation when the power supply is interrupted. The electric heating unit will
resume heating when the power supply is restored.
3.1.3 Inspection during the period of operating
Check if there is proper circulation between the electric heating unit and the heating system.
Check if the electric heating unit operates properly by opening and closing the room temperature controller.
3.1.4 Shutdown
Press the key for 5 seconds.
When the electric heating unit is in shutdown mode
, the circuit board is still electrified.
Under this conditions the frost protection is still active.
B
When the power supply is switched off, the frost protection function is not active.
To avoid frost-caused losses following the unit’s long disconnection from the power supply system, the complete drain of
the heating system and its filling with antifreeze agent in accordance with the requirements.
3.2 MAINTENANCE
The regular maintenance operations help avoid any possible faults.
A full inspection once a year, before putting into operation the heating system, is recommended.
Do not demount the housing. The user can wash the housing’s surface, using detergents, can control the operation mo-
des and can supplement the system with heat carrier after the water pressure is checked, depending on the value showed
by the thermo manometer.
While checking, tighten all the electric joints and water connections, clean the water pump, the Y filter, check the safety
valve, the discharge valve, as well as all the safety devices. Then check if the unit operates properly.
When the unit operates in a closed heating system with an expansion vessel under pressure, check frequently the value
indicated by the pressure gauge. In the cooling stage, with a decrease of the residual pressure below the limit established
by the company responsible for installation, the unit’s check by specialized personnel is necessary. This is not applica-
ble in the case of the first heating or when the safety valve opens. In such cases, fill the system with water following the
instructions.
Cleaning the appliance case: Use a damp, soft cloth to clean the outer painted metal case of the appliance, do not use
chemicals or abrasive materials.
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