17 Commissioning
Installation and operation manual
39
REYQ8~20+REMQ5U7Y1B
VRV IV+ heat recovery
4P546222-1B – 2020.10
After installation and once the field settings are defined, the installer
is obliged to verify correct operation. Therefore a test run MUST be
performed according to the procedures described below.
17.1
Precautions when commissioning
CAUTION
Do NOT perform the test operation while working on
the indoor units.
When performing the test operation, NOT only the outdoor
unit, but the connected indoor unit will operate as well.
Working on an indoor unit while performing a test operation
is dangerous.
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.
17.2
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
32]. 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.
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 for 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.
Air inlet/outlet
Check that the air inlet and outlet of the unit is NOT
obstructed by paper sheets, cardboard, or any other
material.
Additional refrigerant charge
The amount of refrigerant to be added to the unit shall be
written on the included "Added refrigerant" plate and
attached to the rear side of the front cover.
Installation date and field setting
Be sure to keep record of the installation date on the
sticker on the rear of the upper front panel according to
EN60335‑2‑40 and keep record of the contents of the field
setting(s).
17.3
About the test run
NOTICE
Make sure to carry out the test run after the first
installation. Otherwise, the malfunction code
will be
displayed on the user interface and normal operation or
individual indoor unit test run cannot be carried out.
The procedure below describes the test operation of the complete
system. This operation checks and judges following items:
▪ Check for incorrect wiring (communication check with indoor
units).
▪ Check of the stop valves opening.
▪ Judgement of piping length.
In case Hydrobox units are present in the system, the pipe length
check and the refrigerant situation check will not be performed.
▪ Abnormalities on indoor units cannot be checked for each unit
separately. After the test operation is finished, check the indoor
units one by one by performing a normal operation using the user
interface. Refer to the indoor unit installation manual for more
details (e.g., Hydrobox) concerning the individual test run.
INFORMATION
▪ It may take 10 minutes to achieve a uniform refrigerant
state before the compressor starts.
▪ During the test operation, the refrigerant running sound
or the magnetic sound of a solenoid valve may become
loud and the display indication may change. These are
not malfunctions.
Summary of Contents for REYQ8U7Y1B
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