DESCRIPTION

The OMD series Refrigerated Compressed Air Dryer has been designed and built to expedite inspection and maintenance operations. The easily removed panels offer immediate access to the operating components of the unit. The cleaning of the solenoid drain valve does not require the usage of service tools thanks to the quick "bayonet" valve sistem and the innovative coil clamp.

OMD Refrigerated Compressed Air Dryers achieve excellent performance even in instances of high ambient and high inlet temperatures. The highly efficient and ultra compact heat exchanger is able to operate effectively in ambient temperatures up to 45°C and inlet temperatures of 55°C, ensuring a reduced compressed air pressure drop.

Performance

OMD dryers are designed with the end user in mind. Particular attention is paid to high efficiency and implementation of technical solutions for easy operation and maintenance.

Thanks to highly effective and ultra compact heat exchanger, OMD dryers achieve excellent performance even in instances of high ambient and high inlet temperatures. They can operate at ambient temperatures up to 45°C and inlet temperatures of 55°C, ensuring a reduced compressed air pressure drop.

The easily removed panels offer immediate access to the operating components of the unit. All components are tightly integrated into the dryer housing, which provide easy maintenance and small footprint.

OMD dryers are sized to match standard compressor outputs. E.g. a 15 kW (20 HP) air compressor with theoretical output of 130 m3/h at 7 bar matches the OMD 135 rated at 136 m3/h.

It is therefore unnecessary to select a larger model: air compressor - dryer combination is tested and certified by producer, within operating limits shown on technical features.

Controller

The control panel contains all the information necessary for the management of refrigeration dryer OMD. It also contains the installed main power button to turn off the refrigerated dryer, RDC 1.0 controller with setting buttons and LEDs for signalization of operating temperature, operation mode, alarm mode and operation of the fan for air cooling of cooling medium.On the control panel there is also a scheme for clear understanding of the drying process.

Electronic condensate drain

Integrated electronic condensate drain EMD 12 is designed for fully automatic discharging of condensate without air losses. The special self-cleaning direct acting valve assures reliable operation. EMD 12 is equipped with operational alarm, led indicator, test button and capacitive level sensor.

High pressure switch

High pressure switch is a control device which is used as safety control. The compressor is stopped by cutting the power supply of the motor of the compressor whenever the discharge pressure of the compressor becomes excessive. This is necessary to prevent the possible damage of equipment.

Low pressure switch

The low pressure switch monitors the system for low pressure faults, such as refrigerant leakage or possible blockage. If the pressure gets too low then the compressor may overheat due to lack of suction gas cooling.

Hot gas by-pass valve

The main purpose of hot gas bypass valve is to prevent condensate from freezing on the surface of the evaporator coil when the system is operating at extremely low load conditions.

Integrated heat exchanger

The incoming air enters into an air-to-air pre-cooler, where incoming air is heated by output air. Then air passes through a refrigerant heat exchanger where the air is cooled by the cold liquid refrigerant. This process causes the moisture to condense in demister into liquid water. Condensate is drained from the system by condensate drain.

Efficent cooling system

The refrigeration compressor pumps hot high pressure gas refrigerant into the condenser which transfers the heat from the refrigerant gas to the ambient air as the gas condenses into a liquid.

Compressor

High efficiency piston and rotary refrigerant compressors assure the circulation of system refrigerant.Compressors have the innovative construction with reduced energy consumption and high reliability levels.

Operating

Moisture saturated and warm compressed air enters into three stage heat exchanger. First stage is air-to-air (a) pre-cooler, where incoming air is heated by output air. Then air passes through a refrigerant heat exchanger (b) where the air is cooled by the cold liquid refrigerant. This process causes the moisture to condense in demister (c) into liquid water. The dried, cold compressed air is then re-heated in an air-to-air heat exchanger (a) before reaching the outlet and going downstream to compressed air network. Relative humidity of the compressed air is reduced considerably. The aluminium module has a vertical flow layout ensuring the condensate flows down to the the electronic level controlled condensate drain.

The circulation of the refrigerant in the cooling system is assured by high efficiency piston and rotary refrigerant compressors which, thanks to their innovative construction have reduced energy consumption and high reliability levels. Only environmentally friendly refrigerants are used.

A hot gas by-pass valve allows the dryer to operate at part load and prevent the evaporator from freezing. Operation of the OMD dryer is monitored by electronic controller which indicates the Dew Point temperature digitally, controls the condenser fan via a probe. From model OMD 235 the fan is activated by a pressure switch.

Ecology

Components conform with 2002195/CE “RoHS” (Restriction of Hazardous Substances) and 2002196/CE “WEEE” (Waste Electrical and Electronic Equipment) European Directives. Only ozone friendly refrigerants are used.