
•The control panel must be connected with the correct polarity and earthed. The fixed wiring in-
stallation itself must provide an isolating device for each pole (L1 and N). Isolating devices are
defined as switches with a contact gap of at least 3 mm. These include miniature circuit breakers,
fuses and protective devices (EN 60335). The heating emergency stop switch DOES NOT count
as an isolating device!
•The cross sectional area of the connection equals 1.5 mm2. The power supply cable is to be pro-
vided with an appropriate fuse protection (10A fuse)
•A heating emergency stop switch outside the installation space and a 10 A fuse protection are
mandatory requirements. In order to increase the level of safety, the German Association for Elec-
trical, Electronic & Information Technologies (VDE) in its guideline DIN VDE 0100 part 739
recommends fitting the unit with a residual current device with a trip current setting of 30 mA
(DIN VDE 0664 or ÖVE-SN 50).
•Sensor cables, mains power cables and load cables must be routed separately.
•Even when working on the sensors, the control panel is to be completely (all poles) disconnected
from the mains power supply.
•Remove the fuse before working on the mains power supply. Electrocution hazard!
•The plugged connectors in the unit and on the console are installation plugs and may not be ei-
ther connected or disconnected when the power is on! The wood-fired heating system is to be
disconnected completely from the mains power supply using the installed isolating device!
•The electrical safety of the unit and its optimal malfunction-free operation is only ensured if the
control panel is connected to an approved protective conductor (earthing) system. If in doubt,
please have the on-site electrical wiring system checked by an approved electrician. The manu-
facturer cannot be held responsible for damage or operational malfunctions that are caused by the
absence or breakage of an earthing conductor.
•It is not permitted to connect the unit to the power utility grid using an extension cable because
this method would not guarantee the required degree of safety.
•In regions where overvoltage hazards exist, suitable precautions should be taken (e.g. lightning
protection).
2.2.1 Connecting sensors, control and mains power cables
Caution! Do not route the sensor cables together with the current carrying cables! The routing of the
sensor cables must be kept as far apart from the current-carrying cables as possible. The mains power
and sensor cables are not permitted to come into contact with any hot parts of the boiler because there
would be a risk of a short circuit.
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