Pressure Leak Test on a Mitsubishi City Multi

Pressure Leak Test on a Mitsubishi City Multi

Job Description: Pressure Leak Test on a Mitsubishi City Multi

Area: Baker Street, London

Issue Identified:  Following a recent call out to site the engineer advised that the unit 6-1-05 was not working correctly. The unit was working correctly when all the other units were shut off which pointed to the starvation of refrigerant and required charge confirmation and a pressure leak test

Works carried out:

  • Isolated the Mitsubishi City Multi unit electrically and mechanically.
  • Recovered refrigerant into a dedicated recovery cylinder.
  • Pressure tested with OFN (oxygen free nitrogen)
  • Leak found on condenser which was repaired.
  • Once proved released Oxygen Free Nitrogen (OFN) into atmosphere and evacuated the system to a minimum of 2 Torr.
  • Re-charged with the recovered refrigerant and trim charged with virgin refrigerant.
  • Test ran and re-commissioned.
  • Completed a waste transfer note and handed to on-site representative.
  • Completed an F Gas certificate.

Mitsubishi Mr Slim – is available as wall or floor mounted and is ideal for retail and offices

M Series –  a very versatile system and is suitable for retail and offices and is available using low GWP R32 refrigerant

Multi Split – the outdoor unit can connect between 2 and 11 indoor units.

City Multi VRV – ideal for larger premises who demand efficiency and high performance

City Multi HVRF – a multi hybrid VRV system which can provide heating in one area and cooling in another area of building

Some of the many Mitsubishi Split units we support
  • PUZ-ZM200/250YKA R32 Power Inverter Heat Pump
  • PUZ-M200/250YKA R32 Standard Inverter Heat Pump
  • PLA-ZM R32 Power Inverter Heat Pump
  • PLA-M R32 Standard Inverter
  • PLA-ZM R32 Power Inverter Heat Pump
  • PLA-M R32 Standard Inverter
  • PLA-SM R32 Inverter Heat Pump
  • PKA-M R32 Power Inverter Heat Pump
  • PKA-M R32 Standard Inverter Heat Pump
  • SLZ-M R32 Inverter Heat Pump
  • PEAD-M R32 Power Inverter Heat Pump
  • PEAD-M R32 Power Inverter Heat Pump
  • PEAD-M R32 Standard Inverter Heat Pump
  • PEAD-M R32 Standard Inverter Heat Pump
  • SEZ-M R32 Inverter Heat Pump
  • PEA-RP R410A Power Inverter Heat Pump
  • PEA-RP R410A Standard Inverter Heat Pump
  • PAC-IF013B-E Air Handling Unit Controller
Abbreviations

HVAC – Heating, Ventiliation and Air Conditioning, PLT – Pressure Leak Test,  PRV – Pressure Relief Valve, PPM – Planned Preventative Maintenance, OFN – Oxygen Free Nitrogen, AHU – Air Handling Unit, GWP – Global Warming Potential, VRF – Variable Refrigerant Flow, VRV – Variable Refrigerant Volume, ACU – Air Conditioning Unit, FCU – Fan Coil Unit, AC – Air Conditioning,  HP – High Pressure, LP – Low Pressure

Ref: 1702