Lauda P 10, Operation Manual

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3.3.2 Refrigerating machine
The refrigerating machine consists of the following main components:

Compressor
A piston compressor is used in the refrigerating machine. The com-
pressor is protected by a motor protection switch, which reacts to
the temperature and current consumption of the compressor. The com-
pressor switches on automatically but can also be activated manually
via the control menu. If safety-related faults occur, the refrigerating
machine is switched off automatically.

Evaporator
A stainless steel tube coil evaporator extracts heat from the internal
bath.

Electronic expansion
Modern electronic expansion valves expand the refrigerant. Cooling
requirements can be controlled with extreme precision using a proce-
dure developed and patented by LAUDA.

SmartCool system
A special form of proportional cooling combined with a controlled fan.
With proportional cooling, the required cooling capacity is set virtually
proportional to the controller signal. Proportional cooling can save up
to 75 % energy compared to standard cooling methods that cool
and reheat. The automatic cooling unit also switches the refrigerating
machine off completely if cooling is not required for a prolonged period.

SelfCheck assistant
All parameters and modes for switching off the heating control and
sensors are checked before actual operation starts. The system not
only displays alarm messages and fault messages, but also notifies the
operator of the need to perform maintenance, such as cleaning the
air-cooled condenser.
The refrigerating machines may contain natural refrigerant,
depending on the model. These refrigerants are combustible.
The refrigerating machines may contain fluorinated refrigerant,
depending on the model.
Refer to
Ä
Chapter 11.2 “Cooling capacity and cooling water”
on page 133 for technical specifications relating to the different
cooling thermostats.
3.3.3 Heat discharge through cooling in a hybrid design
The heat of the refrigerating machine is discharged by a combined air and
water cooling system. The user can cool using either air or water at any time.
If the user opens the cooling water supply to the device while the device
is operating, the system switches automatically from air cooling to water
cooling. If the cooling water system does not discharge enough heat energy,
the device switches on air cooling automatically as a supporting measure.
Hybrid cooling
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