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MECHANICAL SPECIFICATIONS
- 6-
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.
Evaporator Coils
Highly efficient cross-finned coils are applied to
provide a larger cooling capacity with low air speed
on the coil. Coils are made of 9.52mm OD and
0.35mm thick seamless copper tubing
mechanically bonded to 0.12mm thick aluminium
fins and are factory leak tested at a pressure of
3.3MPa. They are provided with strainers attached
to the capillary tubes to further ensure a clean
system.
DESCRIPTIONS
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.