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Piping installation
Installer and user reference guide
82
LREN8~12A7 + LRNUN5A7
CO₂ ZEAS outdoor unit and capacity up unit
4P704142-1 – 2022.08
▪
All service ports are of the backseat type and do not have a valve core.
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After handling the service port, make sure to tighten the service port cap and the
valve cap securely.
▪
Check for refrigerant leaks after tightening the service port cap and the valve
cap.
Parts of the service port
The figure below shows the name of each part required in handling service ports.
a
b
c
a
Service port cap
b
Copper packing
c
Valve cap
To open the service port
1
Remove the service port cap with 2 spanners and remove the copper packing.
a
a
Copper packing
2
Connect the charge port to the service port.
3
Remove the valve cap with 2 spanners.
4
Insert a hexagonal wrench (4 mm) and rotate counterclockwise until the end.
Result:
The service port is fully open.
To close the service port
1
Insert a hexagonal wrench (4 mm) and rotate clockwise until the end.
2
Tighten the valve cap with 2 spanners. Apply screw lock agent or silicon
sealant when tightening.
3
Add a new copper packing.