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21
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Commissioning
Installer and user reference guide
130
RWEYQ8~14T9Y1B
VRV IV water-cooled system air conditioner
4P452191-1B – 2020.10
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).
Inspect the
water filter
at the inlet piping of the outdoor unit. Clean if it is dirty.
The
piping work
has been carried out according to this document and the applicable
legislation. Make sure that following components are positioned at their correct places:
▪
water filter,
▪
air purge valve,
▪
automatic water supply valve, and
▪
expansion tank.
Water circuit
Make sure that the water circuit is filled.
Water flow
Make sure that the calculated water flow rate can be reached.
21.4 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.