20
|
Commissioning
Installer and user reference guide
129
LREN8~12A7 + LRNUN5A7
CO₂ ZEAS outdoor unit and capacity up unit
4P704142-1 – 2022.08
INFORMATION
During the first running period of the unit, the required power may be higher than
stated in the technical engineering data of the unit. This phenomenon is caused by
the compressor, that needs a continuous run time of 50 hours before reaching
smooth operation and stable power consumption.
NOTICE
Turn ON the power 6 hours before operation in order to have power running to the
crankcase heater and to protect the compressor.
During test operation, the outdoor unit and the indoor units will start up. Make
sure that the preparations of all indoor units are finished (field piping, electrical
wiring, air purge, ...). See installation manual of the indoor units for details.
20.3 Checklist before commissioning
1
After the installation of the unit, check the items listed below.
2
Close the unit.
3
Power up the unit.
You have read the complete installation and operation instructions described in the
installer and user reference guide
.
Installation
Check that the unit is properly installed, to avoid abnormal noises and vibrations when
starting up the unit.
Field wiring
Check that that the field wiring has been carried out according to the instructions described
in the chapter
101], according to the wiring diagrams and
according to the applicable national wiring regulations.
Power supply voltage
Check the power supply voltage on the local supply panel. The voltage MUST correspond to
the voltage on the nameplate of the unit.
Earth wiring
Be sure that the earth wires have been connected properly and that the earth terminals are
tightened.
Insulation test of the main power circuit
Using a megatester for 500 V, check that the insulation resistance of 2 MΩ or more is
attained by applying a voltage of 500 V DC between power terminals and earth. NEVER use
the megatester for the transmission wiring.
Fuses, circuit breakers, or protection devices
Check that the fuses, circuit breakers, or the locally installed protection devices are of the
size and type specified in the chapter
101]. Be sure that no
fuse or protection device is bypassed.
Internal wiring
Visually check the electrical component box and the inside of the unit for loose connections
or damaged electrical components.
Safety valve (field supply)
Check that the safety valve (field supply) has been installed correctly according to
standards EN378-2 and EN13136.
