INSTALLATION | Appliance installation
34
www.ochsner.com | 982000-AIR-M2-M4-EN03.1
10.4 Electrical connection
10.4.1 General
WARNING: Electrocution
Before commencing work on electrical connections
and installation, the heat pump system must be
isolated and voltage-free.
WARNING: Electrocution
Work on electrical connections and installation may
be conducted only by qualified contractors.
WARNING: Electrocution
Before commissioning, the necessary fault pro-
tection measures on the system and the earth
connection must be checked by an authorised
contractor.
i
Information
It is essential that the regulations of the responsible
power supply utility (PSU) and the applicable EN
standards be observed.
►
Before commencing work to connect up the power
supply, the necessary activities defined in „Preparing
the electrical connections“ on page 22 must have
been completed.
►
For the electrical connection, use the system principle
schematic appropriate to your heat pump system from
section „System schematic diagrams“ on page 68.
10.4.2 Electrical connection of the indoor unit
»
Remove the control box cover (see „Disassembling
the appliance casing“ on page 26).
11_02_200_202_01_01
1
»
Undo and remove the four nuts on the two metal
plates at the cable entries.
»
Remove the two metal plates at the cable entries to
gain access to the cable strain reliefs.
i
Information
When fitting the cables in the indoor unit, ensure
that subsequent connection work and soldering on
the refrigerant lines will not be obstructed by the
cables.
i
Information
For the shielded cables between the outdoor and
indoor units, use the shielding clamps provided on
the control box panel.
i
Information
For the cables inside the control box on the indoor
unit, use the cable strain reliefs provided.
»
Connect the lead for suction gas sensor S2 (coming
from the outdoor unit) to the terminal provided.
»
Connect the cable for the stepper motor of expansion
valve A (located in the outdoor unit) directly to the
free terminal on the expansion valve controller (EVD).
Be sure that each wire is connected correctly accord-
ing to its colour.
»
Connect the leads for defrost sensors TQE and TQA
directly to the OTE controller.
»
Connect the fan speed lead (0-10 VDC) directly to the
OTE controller.
»
Connect the temperature sensors required by your
system (TA, TPO, TPM, TMK, TB) directly to the OTE
controller.
»
Connect the external pumps and servomotors re-
quired by your system (switching module, mixing
valve) directly to the OTE controller.
i
Information
For external pumps and servomotors, use the PE
terminals on the relevant OTE plug.
