Checklist Before Commissioning - Daikin VRV IV+ Installer And User Reference Manual

8.3 Checklist before commissioning

RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ heat pump
4P546228-1A – 2019.10
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.
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 "6.8 Connecting the electrical
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 identification label 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
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.
Pipe size and pipe insulation
Be sure that correct pipe sizes are installed and that the insulation work is properly
executed.
Stop valves
Be sure that the stop valves are open on both liquid and gas side.
Damaged equipment
Check the inside of the unit on damaged components or squeezed pipes.
Refrigerant leak
Check the inside of the unit on refrigerant leakage. If there is a refrigerant leak, try to repair
the leak. If the repair is unsuccessful, call your local dealer. Do not touch any refrigerant
which has leaked out from refrigerant piping connections. This may result in frostbite.
Oil leak
Check the compressor for oil leakage. If there is an oil leak, try to repair the leak. If the
repairing is unsuccessful, call your local dealer.
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wiring" [ 76], according to the wiring diagrams
"5.4.3 Safety device requirements"
Installer and user reference guide
Commissioning
4 [ 45]. Be sure
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