Electrical connection
For devices of series MVT 600-
1050 DC, an electrical supply
must be laid as mains supply to
the outdoor unit as well as the
supplied 4-core control line from
the indoor unit to the outdoor
unit.
We recommend that screened
control lines are used with
a minimum cross-section of
1.5 mm².
Connecting the outdoor unit
Before making the connection,
observe the following information:
■
Customers should install
a terminal box in the vicinity of
the outdoor unit.
We recommend that a main/
repair switch is used
(Figure 9)
.
■
Voltage is supplied to the
indoor unit through the
connection cable between
the outdoor component and
outdoor unit.
■
Details concerning the electrical
protection of the system are
given in the technical data.
Observe the required
diameters!
■
If the outdoor unit is installed
on a roof, ensure it is protected
against lightning strikes.
■
Label the electrical control lines
and the associated refrigerant
pipes of each interior device
with the same letter (A to D).
9 Connecting the outdoor unit
A vacuum of min. 20 mbar
must be created!
CAUTION
The time required to generate
the vacuum is dependent on
the pipework volume of the
indoor unit and the length of the
refrigerant pipes. This always takes
at least
60 minutes
.
Once any foreign gases and
humidity have been completely
extracted from the system, the
valves on the pressure gauge
station are closed and the valves
on the outdoor unit are opened
as described in the chapter on
"Commissioning".
All electrical installation
work should be performed
by specialist contractors.
Isolate the voltage supply
when connecting the electrical
terminals.
CAUTION
10 Connecting the cable
Strain relief
Plug control
line indoor
unit A
Plug control
line indoor
unit C
Plug control
line indoor
unit B
Terminal block
Mains cable
■
Only connect the lines to their
associated connections as
labelled with the same letter.
Mixing up the assignment
of control lines and
refrigeration pipes can lead
to fatal consequences such as
compressor damage!
Proceed as follows to connect the
cable:
1. Remove the side panel next to
the terminals.
2. Select the cable cross-section
according to the relevant
standards.
3. Feed the cables through the
edge protection rings on the
fixed connection panel.
4. Insert the control lines into
the corresponding sockets. In
doing so, pay attention to the
alignment of the circuits.
5. If the supplied control lines
are too short, they can be
unclamped from the indoor unit
and extended by an electrician.
6. Support the cable in the strain
relief and re-assemble the unit.
Check all plugged and clamped
terminals to verify they are
seated correctly and making
a permanent contact. Re-tight-
en as required.
CAUTION
Additional sensor and control
lines may be required on some
indoor units.
NOTE
REMKO MVT
16
