[F] Compressor; [G] Evaporator (Drum); [H] Condenser - Hoshizaki TM-500AAE Service Manual

to an open flame, R404A creates Phosgene gas, hazardous in large amounts. Handle the
refrigerant in a well-ventilated area with no flames.
Always recover the refrigerant and store it in a proper container, if required by an applicable
law. Do not discharge the refrigerant into the atmosphere.

[f] COMPRESSOR

The Compressor absorbs the low-pressure refrigerant gas vaporized in the Evaporator (to reduce
the pressure inside the Evaporator), compresses the refrigerant into high-temperature high-
pressure gas, and sends it out to the Condenser.
The hermetic-type Compressor is efficient in refrigeration, and the refrigeration circuit is designed
to endure long hours of operation. The Compressor is mounted on vibration damping rubber to
prevent transmission of vibration. In case of accidental overload, the Case Thermostat or
Overload Relay will shut down the Compressor. The Reset Button must be pressed to reset the
Overload Relay.

[g] EVAPORATOR (DRUM)

The Evaporator is a drum with shafts at both ends and a refrigerant path between a metallic
exterior and a plastic interior. The refrigerant flows through a very narrow path in the Expansion
Valve with a sudden drop of pressure and evaporates by absorbing heat of vaporization from
the Evaporator. The water supplied inside the Tank holding the Evaporator is deprived of heat
and forms thin ice around the Evaporator, which will be scraped off by the Cutter.

[h] CONDENSER

The Condenser refrigerates and liquefies the high-temperature high-pressure refrigerant gas
discharged from the Compressor into high-pressure liquid refrigerant.
A dirty Condenser will significantly reduce the refrigeration efficiency and performance, and will
also shorten the service life of the components (especially refrigeration circuit). The Condenser
must be cleaned according to the following instructions. The frequency of cleaning depends on
the installation conditions.
Air-cooled Condenser (Fin-and-tube type)
A copper tube is attached on a finned aluminum plate with high heat conductivity to promote
heat radiation, and a Fan Motor is also provided for forced air cooling. A remote type Condenser
is also available to protect the interior from noise of the Fan Motor and temperature rise by heat
radiation.
Use a vacuum cleaner or brush to remove dirt and dust between the fins. Be careful not to bend
the fins.
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