INSTALLATION | Preparing to install the appliance
982000-AIR-M2-M4-EN03.1 | www.ochsner.com 23
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 field.
9.5.2 Heat pumps for single phase alternating current
11_02_200_202_01_024
C13A
B16A
1 x 230 VAC
1 x 230 VAC 3 x 230 VAC
1
2
3
4
5
6
1 Heat pump indoor unit control box
2 Main system distributor board
3 Supply to main power circuit (compressor)
4 PSU signal contact
5 Supply to control circuit (OTE controller)
6 Supply to electric booster heater
Description
Type
Max.
starting
current
[A]
Max. op-
erating
current
[A]
Fuse
Main power cir-
cuit
(compressor and
fan)
AIR 11 C11B
48.5
20.8
C25A
AIR 18 C11B
80.0
30.0
C40A
Electric booster
heater
AIR 11 C11B
–
12.8
B16A
AIR 18 C11B
Control circuit
(control unit)
AIR 11 C11B
–
6
C13A
AIR 18 C11B
9.5.3 Cables from main distributor to indoor unit
Description
Wires
Min. cable
cross-sec-
tion
Supply to electric booster
heater
(8.8 kW electric immersion
heater)
3x 400 VAC
(L1/L2/L3/N/PE)
or
3x 230 VAC
(L/L/L/N/PE)
2.5 mm²
Control circuit supply
1x 230 VAC
(L/N/PE)
1.5 mm²
Supply to pumps and ser-
vomotors
1x 230 VAC
(L/N/PE)
1.0 mm²
Sensor leads
(system temperature sen-
sors)
2x
(shielding recommend-
ed)
1.0 mm²
Bus leads
(eBus connections from
OTE
controller to remote
controllers or auxiliary
modules and in cascades)
Example:
Y(ST)Y 2x2x0.8
(shielded cable design
and twisted cable
pairs)
0.8 mm²
9.5.4 Cables from indoor to outdoor unit
Description
Wires
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
Fan speed
(0-10 VDC)
2x
(shielding recom-
mended)
1 mm²
Defrost sensor (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
0.8 mm²
Suction gas sensor S2
(for expansion valve control-
ler)
2x
(shielding recom-
mended)
1 mm²
9.5.5 Temperature sensor
i
Information
The maximum line length for sensor leads is 50 m.
i
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):
The two defrost sensors are factory-installed in the evap-
orator on the outdoor unit.
