Daikin GCU2020PXB1 Installation, Commissioning And Maintenance Manual page 17

Page 17 of 179
13.3 Evacuation
Before starting the vacuum procedure it is necessary to open by hand the high pressure valve (HPV), see section
11 above. Also you can refer to P&ID attached in this maunal. For this operation the magnetic tool shown below
needs to be used.
CAREL Product Reference & name: EEVMAG000 – Valve actuator
The operator can stop the vacuum procedure when the standing vacuum pressure (SVP) reaches 0.5 Torr.
13.4 Charging R efrigerant into the System
Initial charging should only be completed once the system has been proven to be leak free and after proper
vacuum. The charging point is located on the liquid line adjacent to the drier assembly. Liquid or gas should not be
added through the low pressure side of the system. Break vaccum with ONLY CO2 vapour (vapour off take
cylinder) up to 8 to 10 bar pressure. By using vapour CO2 up to that pressure you can avoid any dry-ice formation.
Make sure that compressor is off during this operation.
Maximum amount of refrigerant can be found below.
13.5 Com m issioning
Com m issioning Step One
1. Remove the main fuses or switch off the circuit breakers for the compressor.
2. Switch on the main isolator on the unit.
3. Switch on each system, individually; checking as the systems are brought on that fans, lights etc. are operating
properly. Check liquid solenoid valves operation and rotation of condenser fans (when fitted). When satisfied that
all systems are functioning, switch off main supply.
Copyright HPL March 2021 P41135 Rev 03