Airedale OptiChill FreeCool 500kW - 1365kW - Manual (Page 9)

Chillers OPTICHILL
™
Chillers
9
Technical Manual : 6530166 V1.6.0 02_2013
General Description
STANDARD FEATURES
Compressor Twin screw semi hermetic compressors comprising:

Electronic Protection Module featuring:
Motor, discharge gas and oil monitoring
Rotation direction protection
Phase failure protection

Low current Star/Delta Start

Internal pressure relief

Discharge non return valve

Oil separator

Oil sight glass

Oil heater

Slide valve stepped capacity control

Suction gas motor cooling
The compressors are mounted to the rigid galvanised heavy duty sub-frame with the use
of vibration reducing isolation.
Liquid injection is not required under normal operating conditions, leading to an increase
in cooling and efficiency
Closed transition Star/Delta compressor start is available as an optional extra; refer to
Design Features & Information , on page 20 for further details.
Economiser ES Controlled by a dedicated EEV, the economiser optimises compressor
performance at full and part load operation; refer to
Design Features &
Information , on page 17 for further details.
Maintainable Dual
Pressure Relief Valve A 3-way dual shut-off valve assembly incorporating 2 relief valves per circuit allows the
maintenance of individual pressure relief valves without the need for
refrigerant evacuation.
Refrigeration Each refrigeration circuit is supplied with the following:

Full operating charge of R134a

Electronic Expansion Valves (EEV)

Discharge line ball valve

Liquid line ball valve

Large capacity filter drier with replaceable cores

Liquid line sight glass

Low pressure switch with Auto reset

High pressure switch with manual reset

Suction and liquid pressure transducers

Discharge line mufflers (DQ Models)