Modular screwed frame in galvanized and painted steel sheet, equipped with shock absorbing feet adjustable in height and spirit levels. 3 or 4 pcs. hermetic compressors, equipped with crankcase heaters and strengthened check valves on the discharge line. Suction header fully covered with insulating material (including individual compressor suction lines), junction for fixing the low pressure probe, discharge header, oil header.
All units are supplied with their refrigerating circuit under helium pressure, already pressure tested and electrically tested. They are suitable for working with R404A (R507). They are all precharged with polyester oil. Single-phase units are equipped with shut off valves on the main discharge and suction lines. On three-phase units each compressor is fitted with shut off valves on discharge line, suction line, oil line and crankcase line.

Oil equalization manifold with level indicator.

Oil separator for each compressor on three-phase units.

Optionals:

Built-in air-cooled condenser and liquid receiver.

Built-in electric switchboard equipped with instrument and low pressure probe (already mounted on the suction header) controlling both start and rotation of compressors; condenser fan speed regulator also included.

Pressure switches in compliance with the EN-378-2 regulation and in accordance with the PED directive.

Heated switchboard.

Voltage monitor.

Suction line filter.

Water-cooled condenser.

Different voltage.

Modular screwed frame painted and galvanized, equipped with height adjustable shock absorbing feet and spirit levels. 2, 3 or 4 pcs semihermetics compressors of the same size, supplied with shut off valves on discharge and suction lines, strengthened check valves on the discharge line. Suction header fully covered with insulating material (including individual compressor suction lines), junction for the low pressure probe fixing, discharge header, oil header with shut off valves on the lines of each individual compressor. Units are supplied with refrigerating circuit under helium pressure, already pressure tested and electrically tested. They are suitable to work with R404A (R507). They are supplied already charged with polyester oil.

Optionals:

Vibration eliminators on discharge, suction and oil lines of each indivi dual compressor.

Crankcase heaters.

Thermistor relays.

Pressure switches in according to the EN378-2 regulations and in conformity with PED directive.

Differential oil pressure switch (for compressors equipped with oil pump).

Oversized frame.

Compressor head cooling fans.

Connection box with electric wiring.

Main switchboard.

Remote air-cooled condenser.

Condenser switchboard.

Oil separator with oil recovery line.

Oil equalization systeme.

Discharge line shut off valve.

Liquid receiver.

Liquid line (filter drier, sight glass and ball valve).

Suction accumulator.

Suction line filter and shut off valve.

Pressure gauges.

Bitzer compressors.

Emergency operation circuit.

Weatherproof housing.

Sound absorbent lining.

Screw Compressor Bitzer, provided with vibration eliminators, two steps of capacity regulation, motor control module INT389R, oil control module INT69VS.

Oil separator provided with heater, thermostat and oil level control.

Off cycle equalizing line from oil separator to suction line provided with shut off valve and solenoid valve.

Air-cooled oil cooler. Fan motor controlled by an electronic thermostat with temperature probe placed on compressor discharge line.

Oil supply line of each compressor provided with filter, flow switch, solenoid valve and indicator.

Oil cooler by-pass solenoid valve controlled by a thermostat with probe placed on the oil supply line of each compressor.

Economizer system provided with plate heat exchanger, complete with solenoid valve and thermostatic valve for each compressor.

Check valve on discharge line.

Liquid receiver provided with inlet/outlet shut off valves.

Liquid line provided with filter (interchangeable cartridge), sight glass and shut off valve.

Suction line provided with liquid separator, filter (interchangeable cartridge) and shut off valve.

Automatic reset LP pressure switches, double safety HP pressure switch, LP pressure switches for economizer control.

Built-in electric switchboard, fully wired and equipped for controlling all above listed functions, provided with fuses, compressor contactors, oil cooler fan motor contactors, thermal relays for compressor protection, isolation transformer (electronic step controller for compressor management including off-loadings, pressure sensor already installed on suction line), thermostat for oil cooler by-pass solenoid valve control, auxiliary relays, timers, control lamps, main isolator with door lock.

Unit under helium pressure, already pressure tested and electrically tested.

Polyester oil charge included.

Optionals:

Remote air-cooled condenser.

Control switchboard for remote condenser.

Condenser fans control pressure switches or electronic speed regulator.

Weatherproof housing.