36 Connecting Electrical Supplies
WARNING
Im
properly connecting the electrical supplies can result
in electrical shock and electrocution. Follow all applicable
electrical codes of the local authority having jurisdiction.
Connecting the electrical co
m
ponents should be perfor
m
ed
only by a licensed professional.
DANGER
Ɣ
You
m
ust ensure that the boiler is disconnected fro
m
the
electrical supply before carrying out any servicing inside
the boiler and, particularly, on the electric ter
m
inal strips.
Ɣ
I
f the electrical supply is connected electrical
contact could occur, causing serious da
m
age due to
electrocution.
CAUTION
Label all wires before disconnecting the
m
when you work
on the controls. Wiring errors can cause i
m
proper and
dangerous operation. Verify proper operation after servicing.
The boiler electrical connections
m
ust be
m
ade by sufficiently
q
ualified staff in strict co
m
pliance with the sections below and
with any electrical safety regulations applicable at the ti
m
e of
installation.
Note
The
N
CB LDWE boiler has an electrical protection
degree of IPX
5
D. The electrical connection must
be made via a bipolar switch located on the same
premises as the boiler. The switch must have a
minimum pole separation of
3
mm.
8.1 Accessing the Terminal Strips
To access the PCB where the terminal strips are located, carefully
follow the steps below:
1. Turn off the power supply to the boiler.
2
. Remove the boiler’s front cover by loosening the four
screws securing it to the case.
Note
Ɣ
Before connecting the cables to the corresponding
connector ter
m
inals, it is essential to thread the
m
through the cable glands located on the underside
of the boiler.
Ɣ
While threading the cables and
m
aking the
connections, take special care that no pieces
of cable fall onto the electrical connections or
electronic cards.
Ɣ
M
ake sure you have tightened the cables
sufficiently.
I
t is essential for the boiler to be
grounded.
Re
m
ove the screw and pull the cover downwards before
connecting the power supply, roo
m
ther
m
ostat,
O
penTher
m
,
and the outdoor te
m
perature sensor.
8. Connecting Electrical Supplies
Summary of Contents for NCB-24LDWE
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