Airedale Ultima Compact FreeCool 30kW - 450kW - Manual (Page 8)

ULTIMA COMPACT FREECOOL Chillers
8
Chillers
Technical Manual : 6259576 V1.2.0_02__2013
General Description
STANDARD FEATURES
Evaporator Stainless steel high efficiency brazed plate heat exchanger(s) will allow optimum heat
transfer between media. Each heat exchanger is insulated with closed cell polyurethane
foam to Class 1 fire rating.
Water inlet and outlet are at the opposite end to the compressor (water inlet and outlet
flanges are to PN16).
A self-regulating pad heater is fitted to the single evaporator and will protect against
freeze up in ambient temperatures as low as -20°C.
Connections for External Trace Heating (230V/500W available).
Condenser Large surface area coil(s) ideally positioned to optimise airflow and heat transfer,
manufactured from refrigeration quality copper tubes with mechanically bonded
aluminium fins.
Free Cooling Coil Large surface area coil(s) ideally positioned to optimise airflow and heat transfer,
manufactured from refrigeration quality copper tubes with mechanically bonded
aluminium fins.
Spacing between condenser and free-cooling coils is provided for cleaning maintenance
along with top access holes and drain holes to the base.
Fan & Motor Assembly -
Condenser Fan Sickle bladed fan assemblies with integral long bellmouth and fingerproof grille.
Incorporate external rotor ac motor technology, to provide highly accurate discreet speed
control, discharges air vertically. The fans offer maximum airflow performance while
keeping sound levels to a minimum.
Each fan is speed controllable and operates from a 3 phase electrical supply.
Energy efficient Electronically Commutated (EC) fans are also available; for further
details, please contact Airedale.
Head Pressure Control 3 phase head pressure controllers are fitted which modulate the fan speed to maintain a
constant condensing pressure in the DX mechanical cooling mode and afford reductions
in input power when overcooling in low ambients.
Additional refrigeration valves are fitted to allow DX mechanical and free cooling functions
to operate simultaneously in order to maximise free cooling and minimise
energy consumption.
Compressor Scroll compressors comprising:

Internal motor protection

Internal pressure relief

Non return valve

External discharge temperature protection

Oil sight glass

Oil heater
Each Tandem / Trio set has an oil equalisation line.
The compressors are mounted to the rigid galvanised heavy duty sub-frame with the use
of vibration reducing isolation.