Ochsner AIR BASIC 109, Operating Manual/Installation Manual

Page: 48 / 92

BA_AIR_BASIC_ELW_Multitower_OTE3_SW5x_CC_EN_V08.docx Page 48 of 92
6 Electrical connection
CAUTION
Long-term operation of a three-phase drive
(compressor, pumps, fans) via a three-phase power
supply with incorrect phasing will damage the drive.
-
Ensure that all three-phase motors are
connected to a three-phase supply with a
clockwise rotating field.
6.1 Cable cross-sections/
screened cable
Cables should be selected by the electrician taking
into account the output and cable lengths.
Conventional cables with multi-strand cores
should be used for wiring sensors and actuators.
The following guidelines should be followed:
Position
min. cross-
section
Connection cables 220-240 VAC
(pumps, actuators) Always size
connection cables according to
the local conditions. 1.5 mm²
Sensor cables: (outdoor sensor,
etc.) Always route sensor cables
away
(min. 20 cm) from
240 V/400 V cables.
The maximum cable length must
not exceed 50 m.
1.0 mm²
Bus cables (eBus e.g.: room
remote controls, auxiliary
modules, bus connections for
cascades, etc.) must always be
routed in a screened configuration.
Only earth the screen once
→
on
the heat pump to PE.
OCHSNER
recommends the
following conventional cable:
Y(ST)Y) 2x2x0.8
CAUTION:
OCHSNER accepts no liability for
damage caused by insufficient
protection
against electric
emissions.
0.8 mm²
Table 4: Cable cross-sections
6.2 PSU control contact
In the case of tariff switching (with interrupted
power supply), the heat pump is temporarily shut
down by the PSU. A control input (jumper on
terminal PSU, terminal strip) is provided on the
controller for this. Where tariff switching takes
place inside the meter (night tariff), the PSU
contact must not be made. In case of shutdown by
the tariff contactor (sealed by the PSU, installed on
site), the heat pump power supply is
disconnected. The heat pump signal contact must
be made via the tariff contactor auxiliary contact.
High limit safety cut-out (HLSC)
If an on-site high limit safety cut-out is installed, it
can be connected to the HLSC contact on the
terminal strip. This shuts down the feed pump.
This only applies for hydraulic connection versions
7.1 and 7.2. In all other versions the HLSC must
interrupt the power supply of the on-site heating
circuit pump
directly .
Observe minimum distances between sensor
cables and 240 V/400 V. If this is not possible, use
screened cables. Connect the screen to the heat
pump on PE. This is particularly important for the
outdoor sensor wiring.
All wiring/cables must be
flexible (Ölflex)!
NOTE