Airedale Ultima Compact FreeCool 30kW - 450kW - Manual (Page 6)

ULTIMA COMPACT Chillers
6
Chillers
Technical Manual : Part No 6259543 TM E_1.3.0 04/2013
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.
A pad heater is fitted to the single evaporator and will protect against freeze up in
ambient temperatures as low as -20°C.
Internal water pipework is trace heated.
Connections for External Trace Heating (240V/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.
Condenser Fan Axial fan assemblies with fingerproof grille and incorporating external rotor motor
technology, to provide highly accurate discreet speed control, discharge air vertically. The
fans offer maximum performance while keeping sound levels to a minimum.
Electrical supply dependent upon model size, refer to Electrical Data .
Head Pressure Control Electronic head pressure controllers are fitted which modulate the fan speed to maintain
a constant condensing pressure, allowing the system to operate satisfactorily in ambient
temperatures as low as -20°C.
Head pressure can be set, monitored and values viewed at the microprocessor display.
Compressor Scroll compressors comprising:

Internal motor protection

Internal pressure relief

Non return valve

External discharge temperature protection

Oil sight glass

Sump 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.
Controls As standard, the microprocessor controller can provide 2, 4 or 6 stages of
capacity control, dependent upon model type.
Optionally, the controller is designed to provide capabilities for;

Building Management Systems

Networking

Sequencing (Master/Slave and Run/Standby)
to meet all your system requirements, please confirm at time of order.
For further details, refer to Controls .
Electrical Dedicated weatherproof electrical power and controls panels are situated at the end of
the unit and contain:

Separate, fully accessible, controls compartment, allowing adjustment of control set
points whilst the unit is operational

Circuit breakers for protection of all major unit components

Separate, permanent supply for controls/trace heating, 230V/50Hz/1ph
The electrical power and control panel is wired to the latest European standards and
codes of practice.
UCC75, 100-450 Mains supply is 3 phase and a neutral is not required. Refer to Interconnecting Wiring .