Mitsubishi Electronics 20 PRH-5, 20-L, 8, 10, 15 manual Descriptions, Mechanical Specifications

MITSUBISHI ELECTRIC Rooftop Air Conditioners Series PR,PRH,RPH-L are available in a wide range of sizes and models to enable the designer to select the best model for each application.

The complete range has been designed for outdoor installation, and the units are provided with the latest technological features to ensure economical, reliable and comfortable ducted type air conditioning.

All series units are completely assembled, wired and strictly tested at the factory. They consist of a

compressors, air-cooled condensers, evaporator fans, condenser fans and auxiliary and control equipment, completely packaged in a water-proof enclosure.

With the development of all series demands for such features as light weight, compactness, increased capacity, appropriate static pressure , air flow control, and having flexibility of inter-facing energy saving electronic controls Mitsubishi Electric have met market expectations.

General

All units are factory assembled, piped, internally wired and fully charged with R-22. They are also tested and checked under a strict quality control system in the factory. All units are designed for outdoor rooftop or ground level installation. Exterior surfaces of all units are phosphatized, zinc-coated steel with acrylic resin primer and ivory white baked enamel finish.

Condenser Coils

Unnecessary power input due to higher discharge pressure is avoided by high performance designs of cross-finned coils. Condenser coils are made of 9.52mm OD, 0.35mm thick seamless copper tubes mechanically bonded to 0.12mm thick aluminium plate fins. Each coil is factory pressure and leak tested at 3.3MPa.

Refrigeration Controls

Refrigeration controls include condenser fan, evaporator fan and compressor contactor. Each circuit of the unit has a separate set of refrigeration controls. PR, PRH,PRH-L-15,20 units have two independent circuits.

Evaporator Fans

Belt-drive, forward curved, centrifugal type fans made of galvanized steel are used to deliver an accurate airflow at low noise level.

Compressors

All units have high efficiency type hermetic line starting compressors. Compressors are equipped with thermal overload protector, overcurrent relay and high pressure protection controls. Crankcase heaters are standard .

Condenser Fan

This direct-drive propeller fan is dynamically balanced, to ensure smooth airflow. A weather- proof three-phase squirrel cage induction motor is used to drive the condenser fan.