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Monobloc Outdoor Unit Installation Manual
11.5 Commissioning modes:
IMPORTANT:
Field connection of interface circuits may lead to safety risks: any control box modification must maintain
equipment conformity with local regulations. Precautions must be taken to prevent accidental electrical
contact between circuits supplied by different sources:
•
The routing selection and/or conductor insulation characteristics must ensure dual electric insulation.
•
In case of accidental disconnection, conductor fixing between different conductors and/or in the
control box prevents any contact between the conductor ends and an active energised part.
Refer to the RUA-CP**01H wiring diagram supplied with the unit for the field control wiring of the following
features:
•
Safety switch (normally close contact, mandatory)
Three possible control configurations:
1.
Connections to the customer remote control
•
On/Off remote switch
•
Heat/Cool select remote switch
•
Home/Sleep select remote switch
•
Alarm/Alert or Operation report…
2.
Connections to the user interface
When the remote-mounted user interface accessory is chosen, the user interface has to be connected at the
terminal block (see section 7.8.8).
NOTE:
It is not possible to have both local user interface and remote user interface on the same unit.
3.
Connections to the customer communication bus
•
Connection to Jbus / ModBus is made using a connector provided directly on the NHC electrical board (see the
wiring diagram provided with the unit).
Check before start the unit
Never be tempted to start the chiller without reading fully, and understanding, the operating instructions and
without having carried out the following pre-start checks:
•
Ensure that all electrical connections are properly tightened.
•
Ensure that the unit is level and well-supported.
•
Check that the hydraulic circuit has sufficient water flow and that the pipe connections correspond to the
installation diagram.
•
Ensure that there are no water leaks. Check the correct operation of the valves installed.
•
All panels should be fitted and firmly secured with the corresponding screws.
•
Make sure that there is sufficient space for servicing and maintenance purposes.
•
Ensure that there are no refrigerant leaks.
•
Confirm that the electrical power source agrees with the unit nameplate rating, wiring diagram and other
documentation for the unit.
•
Ensure that the power supply corresponds to the applicable standards.
•
Make sure that compressors float freely on the mounting springs.
