Water Treatment - flowair AURA HCS Series Installation And Operating Instruction

EWIT and EWOT sensors are used to control the medium temperature and at the same time as protection against evaporator
freezing (more information - ACS system manual).
Filling the system
For frost protection and for the correct function of the cooling system, the system (individual parts) must be well vented
during commissioning. For proper venting of the system, it is necessary to install automatic or manual release air valves at
the highest points of the pipeline, regardless of their presence in the equipment.
The expansion vessel also includes a service valve enabling manual deaeration and disconnection of the vessel from the
system for checking the air pressure in the vessel - usually around 1.5 bar.
The minimum amount of water in the system, including the evaporator, should correspond at least to the amount of
water that flows in the system in 2 minutes. If the system does not meet this condition, it is necessary to install a
Insufficient water can affect:
• Correct function of safety elements - risk of equipment damage
• Faster wearing out of the equipment due to the risk of cavitation on the pumps as well as frequent switching on and
off of the cooling circuit
• Cooling capacity due to irregular operation
System downtime in winter
Equipment using water as a cooled medium must be protected against frost damage to parts of the hydraulic circuit when
the outside temperature drops below 4°C.
If the unit is equipped with resistance heat exchanger heating, it is necessary to check the presence of electrical supply during
the entire shutdown at low temperatures.
Before shutting down the machine in the winter, when temperatures may drop below 0°C, check that there is no
water in the hydraulic circuit and loosen the drain valves and plugs or fill the system with antifreeze. Freezing water
External part of the hydraulic circuit
The connection of the pipeline network to the equipment, its setting and installation must comply with current legal
regulations, technical requirements and requirements for maximum safety. In addition, following the instructions below will
prevent damage to the device:

Avoid unnecessary pressure losses, ensure correct circuit size and tracing.

The connecting pipe must be fastened to a separate supporting structure so that it does not burden the assembled
joints.

Connect expansion joints to the device to prevent noise and vibration.

Install shut-off and drain valves on the outside of the unit so that you can shut down and drain the system for
maintenance and service.

Install the drain valve at the lowest points of the water circuit and the vent valve at the highest points of the circuit.

Install a particulate filter at the inlet to the unit to prevent possible freezing and damage to the evaporator.

Mount a thermometer and manometer on the inlet and outlet of each heat exchanger for quick inspection and
maintenance.

Hydraulic piping must be insulated to prevent condensation and thus loss of performance. Pipe insulation is only
performed after checking the complete system under pressure.

Water treatment

The quality and purity of the refrigerated medium play a crucial role in the trouble-free and energy-efficient operation of the
cooling equipment.
The cleanable strainer filter must be installed at the liquid inlet to the evaporator (possibly recuperation), which
removes impurities before entering the exchanger. Install a cleaning filter at least 1 000 mm before connecting the
evaporator and after all welds (there are no welds between the filter and the evaporator). The filter should have holes
no larger than 1.5 mm for models with a plate evaporator or 3.0 mm for a tube evaporator.
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storage tank of appropriate volume in the system.
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could damage the device.
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FLOWAIR sp. z o.o. / OMSAC210708EN 14