Electrical Installation; Preparing The Electrical Installation; Requirements For The Quality Of The Mains Voltage; Electrical Partition - Vaillant VWL Series Operating Instructions Manual

6 Electrical installation

6 Electrical installation
6.1

Preparing the electrical installation

Danger!
Risk of death from electric shock as a res-
ult of an improper electrical connection!
An improper electrical connection may neg-
atively affect the operational safety of the
product and result in material damage or per-
sonal injury.
▶
Only carry out the electrical installation if
you are a trained competent person and
are qualified for this work.
1. Observe the technical connection conditions for con-
necting to the energy supply company's low-voltage
network.
2. If the local power supply network operator requires that
the heat pump is controlled using an ESCO blocking
signal, install a corresponding contact switch as pre-
scribed by the power supply network operator.
3. Determine whether the power supply for the product
should be set up with a single-tariff meter or a dual-tariff
meter.
4. Connect the product via a fixed connection and a parti-
tion with a contact gap of at least 3 mm.
5. For the electrical fuse protection, use slow-blow fuses
with C characteristics. Lay out fuses in accordance
with the selected connection diagrams. Use three-pole
switching fuses for a three-phase power supply.
6. Leave the cable cross-section for the connection cable
to the distribution box unchanged.
7. If the power supply cable for this product is damaged, it
must be replaced by the manufacturer or their customer
service or a similarly qualified person in order to prevent
any hazards.
8. Ensure that the nominal voltage of the power grid cor-
responds to that of the product's main power supply
cabling.
9. Make sure that access to the power supply is always
available and is not covered or blocked.
6.2 Requirements for the quality of the mains
voltage
For the mains voltage of the single-phase 230 V network, a
tolerance of +10% to -15% must be provided.
For the mains voltage of the three-phase 400 V network, a
tolerance of +10% to -15% must be provided. For the voltage
difference between the individual phases, a tolerance of +-
2% must be provided.
28
6.3

Electrical partition

The electrical partitions are referred to as "disconnectors"
in these instructions. The fuse or the circuit breaker that is
installed in the building's meter/fuse box is usually used as
the disconnector.
6.4 Installing components for the energy supply
company lockout function
Condition: Energy supply company lockout function provided
The heat generation from the heat pump can be switched off
temporarily by the energy supply company – usually by using
a ripple control receiver. The unit can be shut down in two
ways:
–
The signal for the shutdown is fed to connection S21 for
the indoor unit.
–
The signal for the shutdown is fed to a partition that is
installed on-site in the meter/fuse box.
▶
Install and wire additional components in the building's
meter/fuse box. To do this, follow the wiring diagram in
the appendix.
Option 1: Actuating connection S21
▶
Connect a 2-pole control cable to the relay contact (po-
tential-free) for the ripple control receiver and to connec-
tion S21.
Note
In the event of control via connection S21, the
energy supply does not have to be disconnec-
ted on-site.
▶
In the system control, set whether the electric back-up
heater, the compressor or both should be blocked via
S21.
Option 2: Disconnect the power supply with con-
tactor
▶
Upstream of the indoor unit, install a contactor into the
power supply for the low tariff.
▶
Install a 2-pole control cable. Connect the control output
for the ripple control receiver to the control input for the
contactor.
▶
Connect the power supply that is switched by the con-
tactor to X300.
Note
When the energy supply (for the compressor
or electric back-up heater) is switched off via
the tariff contactor, S21 is not connected.
Installation and maintenance instructions Hydraulic Station 0020291544_01