SystemAir MCV 15 Manuel D'installation page 15

3OHDVH QRWH : If the installation has been loaded with refrigerant gas during the winter
season, do not fully load the circuit in order to avoid the system stopping during the summer due to
high pressure.
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An excessive refrigerant gas load will result in the flooding of part of the condenser and subsequent
reduction of the heat exchange capacity of the coil. In fact, this represents a reduction in the available
surface area of the condenser coil. The condensing temperature will consequently be very high while
the liquid line leaving the condenser will have a temperature much lower than that which corresponds
to the condensing pressure (as indicated on the pressure-guage).
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Once the machine is in full operation and the maximum condensing temperature of 52° C (19 kg/cm²)
has been reached (this condensing temperature is generally the highest normally found in air-cooled
units), the compressor motor will have an input that is lower than the "FLA" (Full Load Amperes) value
indicated on the identification plate of the compressor itself.
If the input is the same as or higher than the value indicated on the plate, this is the result of either
wrong power supply (excessive drop in power lines) or very high expansion and condensing
temperatures due to an error in the installation or the gas loading of the system.
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For all models in all configurations,it is necessary to fit within the indoor unit, a condensate discharge
with a diameter of ¾".
This discharge or drain must have an adequate inclination, keeping in mind that it drains by force of
gravity, and must not be connected to other drains that are under pressure.
It is advisable to use a syphon in order to avoid return of bad odours through the discharge pipe.
For all models in all configurations that are equipped with a humidifier, it is necessary to supply to the
indoor unit, normal tap water that has not been treated. The water can be supplied through adequate
plastic or PVC tubes having a diameter of 6mm with a shut-off valve fitted on the tubes.
The water supply pressure should be between 1,5 and 5 Bar.
:DUQLQJ : this drain discharges water with a temperature of about 100° C and the tube utilised must
A drain pipe, adequately inclined, must also be fitted, and have a diameter of ¾".
therefore be heat resistant.
In machine configurations 1-3-5-6, condensers and cooling or heating coils that require water supply,
piping should be of the diameters and sizes for the flowrates indicated in the individual diagrams of the
A/C units, as well as being adequately insulated and fitted with shut-off valves.
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Each A/C unit is supplied with its own electrical wiring diagram and all wiring connections are to be
effected following the indications of the wiring diagram itself. The wire sections must be of adequately
sized in relation to the power of the unit and the length of the line in order to maintain within prescribed
limits any drop in power supply.
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