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Specific installer safety instructions
Installer and user reference guide
17
LREN8~12A7 + LRNUN5A7
CO₂ ZEAS outdoor unit and capacity up unit
4P704142-1 – 2022.08
WARNING
All installed safety valves MUST ventilate to the outdoor space and NOT into a closed
area.
WARNING
Install safety valves in a proper way according to the applicable national regulation.
WARNING
To ensure that the safety valve(s) and the changeover valve are properly reinstalled,
a leak test is mandatory.
CAUTION
NEVER bend high pressure piping! Bending can reduce the pipe thickness and thus
weaken the piping. ALWAYS use K65 fittings.
CAUTION
When installing a safety valve, ALWAYS add enough support to the valve. An
activated safety valve is under high pressure. If not installed securely, the safety valve
may cause damage to the piping or the unit.
CAUTION
Do NOT open the stop valve until you have measured the insulation resistance of the
main power supply circuit.
CAUTION
ALWAYS use nitrogen gas for leak tests.
CAUTION
ALWAYS use K65 T-joints for refrigerant branching.
CAUTION
Install the refrigerant piping or components in a position where they are unlikely to
be exposed to any substance which may corrode components containing refrigerant,
unless the components are constructed of materials that are inherently resistant to
corrosion or are suitably protected against corrosion.
Electrical installation (see
)
DANGER: RISK OF ELECTROCUTION
