Electrical Connections; General; Characteristic Of The Electrical Supply; General Remarks On Electrical Connections - Fujitsu Waterstage WOYG112LCTA Maintenance Document

Air to Water Heat Pump (Split integrated DHW type)

5 Electrical connections

Ensure that the general electrical power supply has
been cut off before starting any repair work.
5 .1

General

5 .1 .1 Characteristic of the electrical supply

The electrical installation must be conducted in
accordance with the prevailing regulations.
The electrical connections must only be made when all
the other fitting operations have been completed (fixing,
assembly, etc.).
" Warning !
The contract concluded with the energy provider must
be sufficient not only to cover the heat pump's power but
also the combined sum of all the appliances likely to be
operating at the same time. When the power is too low,
check with your energy provider the value subscribed to
in your contract.
Never use a socket for the power supply.
The heat pump must be supplied directly (without
external switch) with power by special protected leads
from the electric panel via 2-pole circuit breakers
specially dedicated to the heat pump, Curve D for the
outdoor unit, curve C for the electrical heating and
domestic water back-ups (see tables on
The electrical installation must necessarily be equipped
with a 30mA differential protection.
This appliance is designed to operate under a nominal
voltage of 230 V or 400 V +/- 10%, 50 Hz (according to
model).

5 .1 .2 General remarks on electrical connections

It is essential to maintain the live-neutral polarity when
making the electrical connections.
Rigid wires are preferable for fixed installations,
particularly in a building.
Tighten the cables using the cable glands to prevent the
conductors from disconnecting accidentally.
Connection to Earth and Earth bonding continuity are
essential.
- 32 -
• Connecting to screw terminals
" The use of round terminal or the ends is
prohibited
- Always select a rigid wire that complies with the
prevailing standards.
- Strip away around 25 mm from the end of the wire.
- With round end pliers, form a loop with a diameter
corresponding to the tightening screws on the terminal.
- Tighten the terminal screw firmly onto the loop created.
Unsufficient tightening can cause overheating, leading
to breakdown or even a fire.
Rigid wire
page 33).
• Connecting to regulation cards
- Remove the corresponding connector and make the
connection.
Pre-cabled bundle connector and/or Screw connector
• Connecting to spring terminals
- Strip away around 10 mm from the end of the wire.
- Push the spring with a screwdriver so that the wire
enters the cage.
- Slide the wire into the opening provided for this
purpose.
- Remove the screwdriver and then check that the wire
is jammed in the cage by pulling on it.
Loop
25 mm
Special screw
and
washer
Terminal
block
Installation and operating manual "1768 - EN"
Round terminal
on flexible wire
is prohibited
3
1
2