Connecting The Condensate Discharge; Connecting Additional Components; Electrical Installation; Preparing The Electrical Installation - Vaillant uniTOWER plus Operating Instructions Manual

5.8

Connecting the condensate discharge

Condition: Cooling mode activated
▶
Heat-insulate all of the pipes for the building circuit in the
building.
▶
If the product is installed in the wet room, you must con-
nect a condensate discharge.
▶
Drill a hole into the hopper (1) on the condensate tray.
–
Diameter: 8 mm
▶
Install a condensate discharge hose on the condensate
tray on-site and connect it to the sewage system via a
free drain.
▶
Ensure that the drain hose for condensate and expansion
relief valve opens in a siphon, which prevents the escape
of ammonia and sulphurous gases.
5.9

Connecting additional components

You can install the following components:
–
Domestic hot water circulation pump
–
Domestic hot water expansion vessel
–
External heating pump (multi-zone operation)
–
External heating solenoid valve (multi-zone operation)
–
Buffer cylinder for the heating system
–
2 l brine expansion vessel
Multiple-zone module and buffer cylinder cannot be installed
at the same time, because they are installed at the same
connections.
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.
32
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. Leave the cable cross-section for the connection cable
to the distribution box unchanged.
6. If the power supply cable for this product is damaged,
it must be replaced by the manufacturer or their cus-
1
tomer service or a similarly qualified person in order to
prevent any hazards.
7. Ensure that the nominal voltage of the power grid cor-
responds to that of the product's main power supply
cabling.
8. 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.
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
(potential-free) for the ripple control receiver and to
connection 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.
Installation and maintenance instructions 0020291525_04