Navien KDB-535GTD Installation Manual page 10

M e d i u m - s i z e d g a s b o i l e r
Correct electric wiring installation
Install the electric wiring as presented in the electric wiring drawing in the installation manual.
Install the dedicated power outlet for the boiler, with a length of less than the effective length of
the power cord. Installation shall be made for the power outlet not to get in contact with the drain
valve of the boiler.
Use the power outlet with a cover attached, and install the outlet at more than 300m above
ground level.
If the power outlet is not provided with a cover, install the outlet in a place free from the impact
of rain or moisture, or in the waterproof box or the indoor distribution box.
Never install a switch onto the power cord, nor use the power outlet with a switch attached. (The
boiler does not operate, when the switch is set at off.)
A ground connection shall be installed, if not, on the side of the power outlet.
The wires of the room temperature controller shall be connected through the insulation pipe with
a thickness of more than 4mm. The insulation pipe shall be installed and concealed with an
upper gradient toward the indoors.
The wires of the circulation pump, connected to the controller, shall not be
short-circuited.
Never make a ground connection to the lightning
rods and the gas pipe.
Ground connection to the lightning rod may result in a boiler
malfunction.
Ground connection to the gas pipe may result in an explosive
accident.
Be sure to use the magnet switch for connection of the
circulation pump with more than 1.5kW.
The boiler may malfunction, without the magnet switch.
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