Power Cable Entry; Field Control Wiring; Electric Power Reserve For The User; Power Connection/Disconnect Switch - Carrier 30RBM 160 Installation, Operation And Maintenance Instructions

6.4 - Power cable entry

The power cables for devices are routed into the electrical box
from underneath the unit,
A removable aluminium plate on the base of the electrical
cabinet provides access for the power cables.
It is important to check that the power cable bend radius is
compatible with the connection space available inside the
electrical cabinet.
Refer to the certified dimensional drawing for the unit.
Connection expansion box
This accessory is used to strip the power cable before it is routed
inside the unit's electrical cabinet, and must be used when the
cable bend radius is not compatible with the space available
inside the electrical cabinet. The "connection expansion box"
accessory provides mechanical protection for the stripped cable
before it is routed inside the electrical cabinet.
It is recommended to use this accessory in the following cases:
• Unit placed on the ground and the use of steel wired
armoured (SWA) cables.
• Unit placed on the ground and use of rigid power cables
with a section > 250 mm

6.5 - Field control wiring

IMPORTANT:
Connecting the interface circuits on-site creates certain safety
risks; any modification to the electrical box must ensure the
equipment remains compliant with local regulations. In
particular, precautions must be taken to prevent accidental
electrical contact between the circuits supplied by different
sources:
• The choice of routing and/or insulation characteristics
of the conductors ensures double electrical insulation.
• The conductors should be fixed together inside the
electrical box to prevent contact between the end of the
conductor and a live part in case of accidental
disconnection.
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See the control manual and the certified electric wiring
diagram supplied with the unit for the field control wiring of
the following devices:
• Device automatic operation control,
• Setpoint 1/Setpoint 2 switching,
• Power limitation,
• Operational fault reporting
• Locking switch (safety chain),
• Customer pump switch control (on/off),
• Setpoint adjustable by 4-20 mA signal,
• Power limitation adjustable by 4-20 mA signal,
• Second power limitation level,
• End of storage cycle signal,
• User fault reporting
• Time schedule override,
• Partial heat recovery activation control,
• Power indication on analogue output (0-10V),
• Unit shutdown general fault reporting,
• Minor alert signalling,
• Partial heat recovery pump On/Off control,
• Free cooling drycooler management.

6.6 - Electric power reserve for the user

Control circuit power reserve:
After all possible options have been connected, the CT
transformer ensures the availability of 1 A of power for the
control cabling on-site on 24 V, 50 Hz.
With the electrical plug option, this CT transformer provides
a 230V, 50Hz circuit to power laptop battery chargers only,
maximum current of 0.8 A at 230 V
IMPORTANT:
Only connect class I and II equipment to this power socket.

6.7 - Power connection/disconnect switch

The power connection of the unit is carried out at a single
point upstream of the unit's disconnect switch.