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ÜKY/DUO Boiler User Manual
ELECTRICAL INSTALLATION INSTRUCTIONS
ÜNMAK ÜKY / DUO series boilers are fed with 230 Volt mains voltage. Where the mains voltage is
less than ten percent or greater than ten percent, the regulator should be used.
The control panel should be connected to a wall panel with suitable grounding equipment, the
distance between the boiler panel and this wall panel should not exceed 50 cm.
Separate grounding installation must be made from the column installation for each boiler room.
Grounding installation:
a) 0.5 m
2
, 2 mm. thick copper sheet,
b) 0.5 m
2
, 3 mm. thick galvanized plate (hot dip) or
c) Solid copper rod should be made with electrodes.
Copper rod electrodes must be at least 1.5 m in diameter of Ø16 mm or at least 1.25 m in diameter
of Ø20 mm and the earthing resistance of rod electrodes must remain below the limits of 20 Q.
(Neutral-Earth voltage ≤3V)
In all three cases, copper electrodes or plates must be connected to the natural gas installation by
soldering or welding, using a minimum of 16 mm2 multi-stranded (braided) copper cable and
conductive lug. Copper electrodes or plates should be placed completely in the ground as teeth, and
the conductor remaining on the ground should be connected with the pipe casing and the main table
of the boiler room.
THIS PRODUCT MUST BE CONNECTED INTO A SAFE GROUND LINE!
The boiler should not be installed in closed and living areas.
