• Compressor motor contactors.
• Fan motor contactors.
• Fan motor circuit breakser(s).
• Power terminal blocs 190-240V & 360-420V 50Hz.
• Separate 220V control circuit terminal block (for field wiring).
• Compressor staging relays.
• Compressor crankcase heater relays.
• Control circuit terminals.
• Control circuit breaker(s).
• Field auxiliary control terminals.

Safety and Operating controls include:

• System on-off switch.
• Oil pressure cut out - manual reset.
• Refrigerant high pressure cut out - manual reset.
• Refrigerant low pressure cut out.
• Thermostat - chilled liquid cycling.
• Freezestat low liquid temperature.
• Timer - compressor delay.
• High and low voltage protection.
• Phase failure protection.
• Fan cycling controls - pressure actuated (optional).
• Compressor staging (optional).
• Liquid flow control (optional).
• Soft start electronic control (Optional).
• Micro-processor programmable controller (optional).

Pressure Gauges are factory mounted suction and discharge pressure gauges for each refrigerant circuit. Each gauge is supplied with its own manual shutoff valve (optional).

FAN CYCLING MEDIUM AMBIENT CONTROL Fans are automatically cycled in response to gas pressure to maintain adequate head pressure and allow compressor start at 30°F ambient (optional).

REFRIGERANT PIPING

Refrigerant circuits include:

• Manual liquid line shut-off valve.
• Automatic liquid line shut-off valve (optional).
• Refrigerant filter-drier.
• Liquid sight glass/moisture indicator.
• Liquid line solenoid valve.
• Thermal expansion valve.
• Permanent charging ports.
• Liquid receiver.
• Suction accumulator (optional).
• External muffler (optional).

DISCHARGE LINES - formed of pre-bent tubing or elbow fittings with long radius bends to eliminate vibrations and minimize pressure drops.

SUCTION LINES - designed for minimum friction loss and proper oil return. All suction lines are insulated with flexible closed cell hoses.

CONDENSER COILS are made of seamless copper tubes expanded onto aluminium fins. Copper fins and lacquered or anodized fins are also available on request. Size of pipes, number of rows, face area, etc... are in accordance with the compressor capacity, evaluated as per ARI Standard Code.

CONDENSER FANS are direct driven propeller type. Blades are statically and dynamically balanced and run at low RPM for quiet and vibration-free operation. Fan blades are protected by heavy gauge fan guards. On request a centrifugal forward curved type blower can be supplied, statically and dynamically balanced, with parts made of galvanized steel sheet, driven directly or by belts.

FAN MOTORS are permanent split capacitor induction type or three phase type with inherent thermal protection. Motors have permanently lubricated ball bearings and are of water proof enclosed type designed for service at ambient temperatures up to 60°C, with additional moisture protection, making them suitable for outdoor conditions. Motors are suitable for horizontal and vertical working positions, and run at low speed, producing low noise, and are manufactured in accordance with most European and American electric norms.

COMPRESSORS. Semihermetic compressors are used, refrigerant gas cooled type with built-in thermal protection, crankcase heater ana large voltage capacity, suitable for 50 and 60 Hertz application. Each compressor is mounted on isolator pads and connected via flexible-vibration-absorbers to the rest of the copper tubing to reduce vibration transmission to the rest of the unit. Compressors are designed for high energy efficiency, compact construction, rugged reliability, long-life and are maintenance free. Compressors can be disassembled in the field for service. Oil level sight glass is standard. Oil electronic pressure control cuts the power to the motor when the pressure drops below acceptable limits.

EVAPORATOR is a shell and tube type cooler. The construction is in accordance with most American and European Norms and Codes (TEMA). Weather and corrosion resistant suitable for outdoor applications. Gas tubes are made of seamless copper tubes and are tested at 28 bar (400 psi). Shell have standard trade water outlets for thermostat, air vent, drain and water main stream. This liquid cooler is also suitable as liquid heater in Heat Pump mode.

ECONOMIZER is available on request, it improves the chilling capacity of the unit, by precooling the liquid entering into the chiller, and preheating the gas at the compressor suction line.

INSTALLATION of the unit is easy because it needs only to be connected to the outside utilities: liquid line and electric power supply. On request, an electric board with remote control and functional display with duty lamps and alarms can be supplied.

ACCESS to all internal parts for cleaning or maintenance, needs loosening of a few screws only to remove any panel. All parts can be easily removed & replaced.