Investigation Work on Air-Conditioning Units in Office Block

Investigation Work on Air-Conditioning Units in Office Block

Job Description: Investigation Work on Air-Conditioning Units in Office Block

Area: Gresham Street, London

Issue Identified: Following a call out attendance for Air-Conditioning Units not functioning correctly. We advised complete control mapping and out of hours investigation to confirm requirements and confirm how and which areas were controlled. Whilst on site we also investigated running data from the condensing unit located on roof level. Two Engineers attended for one full weekend with a reporting analysis break followed by a further Saturday.

Scope of Works Carried Out:

  • Attended site to carry out mapping of 1st 2nd and 3rd floors.
  • After investigation we found the 1st floor units were not set up correctly on the dip switches so the units above the celling were reading incorrectly.
  • We changed the settings to read from RC controllers on the walls.
  • One unit was not wired up, so we paired with the correct unit.
  • Tested both heating and cooling.
  • 2nd and 3rd floor had refrigerant issues (incorrect charge) and required refrigerant to be removed and a PLT (pressure leak test) carried out.
  • All issues reported to client for further work requirements.

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