Replace Crankcase Heater on a Ciat Chiller
Job Description: Replace Crankcase Heater on a Ciat Chiller
Area: Isle of Dogs, London
Issue Identified: Following a recent maintenance visit, our engineer found the expansion valve had failed and caused circuit 1 to trip. The crankcase heater was also not turning on therefore required replacing.
Works carried out:
- Isolated the Ciat Chiller unit mechanically and electrically.
- Removed and replaced the crankcase heater.
- Recovered the refrigerant into a certified cylinder for safe storage on site.
- Checked and confirmed the charge.
- Removed and replaced the expansion valve.
- Replaced the drier cores in the circuit.
- Pressure tested with OFN (oxygen free nitrogen) to confirm system was leak tight.
- Once proven released OFN to the atmosphere and evacuated the system to a minimum of 2 Torr.
- Re-charged with recovered refrigerant.
- Completed the F Gas and logs.
- Cleared site of all waste generated.

ACES Group Can Also Supply and Install New Chillers – Call Us On 01865 890996
Ciat Chiller Features
The AQUACIAT Chillers have been adapted for heating and air conditioning applications in the fields of Offices, Healthcare, Industry, Administration, and Commercial buildings.
These units are designed for outdoor installation and do not require protection from adverse weather conditions.
To operate in COOLING or HEATING mode, these units use outside air as the only external source, this permits the evacuation of heat in summer or the supply of thermal energy for heating in winter.

Some of the many Ciat Chillers we support
- AQUACIAT POWER ILD R32
- AQUACIAT LD R32
- AQUACIAT POWER LD R32
- POWERCIAT LX R134a
- AQUACIAT LD R410A
- AQUACIAT Free Cooling
- AQUACIAT Power R410A
- CIAT Cooler R-410A
- AQUACIAT2 HYBRID R-410A
- AQUACIAT Caleo
- GEOCIAT Modular
- DynaCIAT Power
- HydroCIAT LW
- HydroCIAT TURBO LWT
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