Ochsner AIR 85 - Cables from Main Distributor to Indoor Unit; Cables from Indoor Unit to Sensors and Actuators; Cables from Indoor to Outdoor Unit; Temperature Sensor

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Machine-specic engineering and preparation
Material damage
Operating a three-phase motor (compressor,
pumps, fans) for long periods using an incorrectly
phased three-phase supply will damage the motor.
»
Ensure that all three-phase motors are
connected to a three-phase supply with a
clockwise rotating eld.
8.4.2 Cables from main distributor to indoor unit
Description Cores Min. cable
cross-sec-
tion
Supply to main power
circuit
(compressor)
3x 400 VAC
(L1/L2/L3/N/PE)
16 mm²
Control circuit supply 1x 230 VAC
(L/N/PE)
1.5 mm²
8.4.3 Cables from indoor unit to sensors and actuators
Description Cores Min. cable
cross-sec-
tion
Supply to pumps and ser-
vomotors
1x 230 VAC
(L/N/PE)
1.0 mm²
Sensor leads
(system temperature sen-
sors)
2x
(shielding recom-
mended)
1.0 mm²
Bus leads
(eBus connections from OTE
controller to remote control-
lers or auxiliary modules and
in cascades)
Example:
Y(ST)Y 2x2x0.8
(shielded cable
design and twisted
cable pairs)
0.8 mm²
8.4.4 Cables from indoor to outdoor unit
Description Cores Min. cable
cross-sec-
tion
Fan power supply 1x 230 VAC
(L/N/PE)
1.5 mm²
Fan alarm (TK) 2x 230 VAC 1.5 mm²
Defrost sensors (TQE,
TQA)
4x
(shielding recom-
mended)
1 mm²
Pulse lead
(for stepper motor on elec-
tronic expansion valve)
4x
(shielding recom-
mended)
Example:
ÖLFLEX® CLASSIC
100 CY
1 mm²
Suction gas sensor S2(for
expansion valve controller)
2x
(shielding recom-
mended)
1 mm²
Information
The lines must be routed to the left-hand and right-
hand half of the outdoor unit.
Material damage
Protect the cables between the indoor and outdoor
units against UV radiation. Use a UV-resistant ca-
ble or a cable in a UV-resistant hose.
Material damage
Protect the cables between the indoor and outdoor
units against damage from rodents.
► The outdoor unit supply must not be any more
lightweight than a rubber hose cable with a pol-
ychloroprene sheath acc. to EN 50525-1 (VDE
0285-525-1).
8.4.5 Temperature sensor
Information
The maximum line length for sensor leads is 50 m.
Information
Sensor leads must be routed separately from 230 V
and 400 V cables. If a minimum distance of 20 cm
cannot be maintained, then shielded cables should
be used. The shielding should be connected to the
earth rail of the heat pump.
Defrost sensors (TQA, TQE):
AIR 85 C14A The two defrost sensors are factory-installed in the
evaporator on the outdoor unit.
Outdoor temperature sensor (TA):
»
Fit the outdoor temperature sensor to the outside wall
of the building (on the north-west side) at a height of
approx. 2.5 m. Make sure that the outdoor tempera-
ture sensor is not exposed to direct sunlight or wind,
as this will impair the control characteristics.
Information
Avoid tting the outside temperature sensor to the
casing of the outdoor unit or in the air ow from
the outdoor unit.
Bu󰀨er sensor (TPO, TPM):
In the heat pump bu󰀨er tank, two bu󰀨er sensors are
required. The heat pump is switched on based on temper-
ature readings from the TPO and switched o󰀨 based on
those from the TPM.
»
Install a sensor pocket in the sleeve provided for the
upper bu󰀨er sensor. (TPO)
»
Install a sensor pocket in the sleeve provided for the
lower bu󰀨er sensor. (TPM)