Airedale Ultima Compact Condensing Unit 30kW - 450kW - Manual (Page 5)

Condensing Units ULTIMA COMPACT
Condensers & Condensing Units
5
Technical Manual : Part No 904-047 V1.4.0_02_2013
General Description
STANDARD FEATURES All models sizes.
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.
Refrigeration Each refrigeration circuit is supplied with the following:

Holding charge of Helium

Liquid line ball valve

Suction line ball valve

Low pressure cut-out with manual reset via microprocessor controller

High pressure switch with manual reset

Pressure relief valve with integral rupture disc and indicator gauge
Refer to Features - Variations for further detail.
Controls microprocessor controller can provide 2-6 stages of capacity control,
dependent upon model type, as standard. The controller incorporates full Building
Management System capabilities, full details can be found in the
Controls section.
Control management is offered in 1 of 4 of the most common types, to select via the
microprocessor, to be specified at time of order:

External 0-10V Signal

Suction Pressure Monitoring

Remote Space Temperature Sensor

Remote Digital Inputs
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.
UCCU75, 100-450 Mains supply is 3 phase and a neutral is not required. Refer to Interconnecting Wiring .