VRF AHU KIT4

Installation and Operating Manual
VRF-AHU Kit 13
6 Electrical connection
6.1 Safety instructions
■ This device may only be installed and connected by specially trained personnel
who is familiar with the safety standards of electrical engineering.
■ The design of the electrical cables must comply with local and national legal
requirements.
■ An all-current-sensitive residual current circuit breaker must be provided in the
supply line.
■ In the supply line, use an all-pole disconnector with at least 3 mm contact
spacing and use only fixed wiring.
■ A polychloroprene-coated, flexible cable (corresponding to 60245 IEC 57) must be
used as the line material for the voltage supply and the control cables between
the indoor and outdoor units.
■ The indoor units must be connected separately from the outdoor units and
separately fused.
■ For the electrical connection of the outdoor unit, refer to the installation manual
of the outdoor unit.
■ Indoor and outdoor units must be earthed.
■ Never apply power to the terminals of the control cables.
■ Supply voltage and control cables must be laid separately with a sufficient
distance (at least 5 mm) to avoid interfering influences.
■ All electrical cables must not come into contact with heat sources, the insulation
could melt and lead to a short circuit and fire hazard.
■ The control cables between the indoor and outdoor units can be installed
together with heat-insulated refrigerant lines.
■ Ensure that the wiring is correct before the power supply is turned on. Never
switch on the air conditioning units without the required refrigerant charge.
6.2 Design of voltage carrying lines and fuses
Technical data of the connection cables to the voltage supply.
Table 6-1
VRF-AHU Kit
Recommended diameter
Power supply
Communication Line
Indoor-Outdoor
All units
220 - 240 V, 50 Hz
208 - 230 V, 60 Hz
3 x 1.5 mm²
3 × 0.75 mm²
shielded
CAUTION!
CAUTION!
Incorrectly dimensioned electrical lines can lead to heat generation and short circuit.