Connecting Electrical Supplies; Accessing The Main Controller (Pba) - Navien LCB700-21RS Installation & Operation Manual

9. Connecting Electrical Supplies

WARNING
Improperly 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 components should be performed
only by a licensed professional.
DANGER
You must ensure that the boiler is disconnected from the
electrical supply before carrying out any servicing inside
the boiler and, particularly, on the electric terminal strips.
If the electrical supply is connected electrical
contact could occur, causing serious damage due to
electrocution.
CAUTION
Label all wires before disconnecting them when you work
on the controls. Wiring errors can cause improper and
dangerous operation. Verify proper operation after servicing.
The boiler electrical connections must be made by sufficiently
qualified staff in strict compliance with the sections below and
with any electrical safety regulations applicable at the time of
installation.
The LCB700 boiler has an electrical protection degree
Note
of IPX5D. 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.

9.1 Accessing the Main Controller (PBA)

DANGER
You must ensure that the boiler is disconnected from the
electrical supply before carrying out any servicing inside the
boiler and, particularly, on the Main Controller (PBA)
To access the PBA, carefully follow the steps below:
1. Turn off the power supply to the boiler.
2. Open the front cover by pulling its sides.
3. Loosen the two screws at the top of the PBA cover and
remove the PBA cover. If the PBA cover is completely
removed, you can gain access to the internal components.
To completely remove the front cover, pull out the
Note
fixation hooks from the holes.
1
2
Connecting Electrical Supplies 41