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Specific installer safety instructions
Installer and user reference guide
20
LREN8~12A7 + LRNUN5A7
CO₂ ZEAS outdoor unit and capacity up unit
4P704142-1 – 2022.08
DANGER: RISK OF BURNING/SCALDING
WARNING
Commissioning method MUST be in accordance with the instructions from this
manual. See
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.
CAUTION
ALWAYS turn off the operation switch BEFORE turning off the power supply.
CAUTION
After the refrigerant is fully charged, do NOT turn off the operation switch and power
supply of the outdoor unit. This prevents the safety valve actuation due to an
increase in internal pressure under high ambient temperature conditions.
When internal pressure rises, the outdoor unit can operate by itself to reduce the
internal pressure, even if no indoor unit is operating.
CAUTION
Do NOT insert fingers, rods or other objects into the air inlet or outlet. Do NOT
remove the fan guard. When the fan is rotating at high speed, it will cause injury.
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING/SCALDING
DANGER: RISK OF EXPLOSION
Pump down – Refrigerant leakage
NEVER pump down the system.
Possible consequence:
If more than 5.2 kg is trapped
in the unit this can cause a release of refrigerant via the safety valve. Also, when
pumping down during a leakage self-combustion and explosion of the compressor
can happen because of air going into the operating compressor.
CAUTION
The safety valve on the liquid receiver is set to 90 bar gauge. If the refrigerant
temperature is ≥31°C, the safety valve might be activated. When you close the stop
valves, ALWAYS and REGULARLY check the pressure in the circuit and avoid that the
safety valve is activated.