Replace Suction Seals on an Airedale PAC Unit
Job Description: Replace Suction Seals on an Airedale PAC Unit
Area: Abingdon, Oxfordshire
Issue Identified: Following a planned preventative maintenance visit our engineer discovered the Airedale unit that supplied the control room was leaking and required new suction seals. The wall controller was also in poor condition, working intermittently thus we advised for it to be replaced.
Works carried out:
- Isolated the Airedale PAC Unit electrically and mechanically.
- Recovered refrigerant into dedicated cylinders.
- Weighed and confirmed the charge.
- Pressure tested with OFN (oxygen free nitrogen) to locate leak.
- Repaired by means of brazing.
- Fitted new suction seals.
- Once the system tightness was proved we released OFN to atmosphere and evacuated system to a minimum of 2 Torr.
- Re-charged with recovered refrigerant, and trim charge with virgin refrigerant.
- Fitted new room thermostat, belts, test ran and commissioned.
- Completed waste transfer note and handed to on-site representative.
- Completed F Gas certificate.

ACES Group Can Also Supply and Install New Air-Conditioning Units – Call Us On 01865 890996
Airedale Units
Airedale Precision Air-Conditioning Units are ideal for clean room environments such as datacentres, hospitals and areas where temperature is critical. Airedale Units range from 6kw to 233kw. ACES engineers have years of expertise maintaining and servicing these units and will ensure each system maximises energy efficiency and uptime.
If you require an emergency call out, we provide a 24/7 service and we have engineers permanently based in London. We know how critical it is to keep your facility running to its optimum temperature and to minimise any unnecessary downtime.

Some of the many Airedale Units we support
- SmartCool XL
- SmartCool
- SmartCool i-Drive
- EasiCool
- AireWall
- InRak 300mm
- OnRak
- InRak
- AireTile
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
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