20
|
Commissioning
Installer and user reference guide
130
LREN8~12A7 + LRNUN5A7
CO₂ ZEAS outdoor unit and capacity up unit
4P704142-1 – 2022.08
Safety valve (accessory)
Check that the safety valve (accessory) has been installed correctly according to standards
EN378-2 and EN13136.
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 (2 in total) are open on the liquid and gas side between the
outdoor unit and indoor unit.
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.
Refrigerant charge
The amount of refrigerant to be added to the unit shall be written in the logbook.
Add the total amount of refrigerant to the refrigerant charge label.
Installation of indoor units
Check that the units are properly installed.
Installation of capacity up unit
Check that the unit is properly installed, if applicable.
Installation date and field setting
Be sure to keep record of the installation date in the logbook.
20.4 About the test run
Make sure to carry out the system test operation after the first installation.
The procedure below describes the test operation of the complete system.
NOTICE
If a capacity up unit is installed, conduct its test run AFTER the test run of the
outdoor unit.
20.5 To perform a test run (7-segment display)
To perform a test run of the outdoor unit
Applicable for LREN*
1
Check that all the stop valves between the outdoor unit and indoor unit are
fully open: gas and liquid stop valves.