20
|
Commissioning
Installer and user reference guide
119
RXYTQ
VRV IV+ heat pump for high ambient temperatures
4P561157-1B – 2021.11
CAUTION
Do NOT insert fingers, rods or other objects into the air inlet or outlet. Do NOT
remove the fan guard. When the fan is rotating at high speed, it will cause injury.
INFORMATION
During the first running period of the unit, the required power may be higher than
stated on the nameplate 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
Be sure to 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
After the installation of the unit, first check the items listed below. Once all checks
are fulfilled, the unit MUST be closed. Power-up the unit after it is closed.
You read the complete installation and operation instructions, as 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
Be sure that the field wiring has been carried out according to the instructions described in
the chapter Connecting the electrical wiring, according to the wiring diagrams and
according to the applicable legislation.
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
"18.1.5 Safety device requirements"
93]. Be sure
that neither a fuse nor a protection device has been bypassed.
Internal wiring
Visually check the electrical component box and the inside of the unit for loose connections
or damaged electrical components.
