KKT chillers vBoxX 10, Instruction Manual

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Table 13: Minimum volume of the installation room with regard to maximum refrigerant concentration in
case of a leak if the chiller is installed indoors
vBoxX 6 8 10 12 15 18 24 28
V
Rmin refrigerant
[m³] 7 11
V
Rmin installation instructions
[m³]
18.7 21.0
If the calculation of the minimum necessary room volume is related to the respective refrigerant fill
quantity only, a room volume of 7 m³ would be sufficient for size I (vBoxX 6 - vBoxX 12) and 11m³
for size II (vBoxX 15 – vBoxX 28), in order to prevent a risk of suffocation.
However, in order to ensure fault-free operation and comfortable servicing of the units the
clearances given in the installation instructions must also be maintained. These are 18.7m³ for
size I (vBoxX 6 - vBoxX 12) and 21.0m³ for size II (vBoxX 15 – vBoxX 28) – see
Appendix II .
The refrigerant fill quantity of the Vario-Line units is therefore so small that if the unit clearances
given in the installation instructions are complied with it is possible to exclude the risk of
suffocation.
6.2.3. Ambient temperature
The chiller is cooled by the ambient air and therefore works more economically the lower the
temperature of this cooling air. Sunshine or waste air from other machines heats up the ambient
air. This must be taken into account when installing the chiller. Preference is to be given to shaded
installation. The maximum ambient temperature is given in the technical specifications.
6.2.4. Effect of surrounding air flow
The chiller gives off heat to its surroundings, in exchange the machine draws in cooling air. The
machine controls the quantity of cooling air independently via the speed of the fan. Air currents
such as wind surrounding the machine can affect this control and endanger operation of the
machine. If a constant air current direction is known of in the installation site, this should not be
directed directly on the air intake side of the chiller.
6.2.5. Minimum clearances
The minimum clearances around the machine are made up of the service clearances and those
to ensure optimum air routing. On the one hand it is necessary to ensure access from all sides,
and in addition it must be possible to draw in an adequate quantity of cooling air without
obstruction and to blow it out upwards. If the minimum clearances are ignored there is a risk of
an air short circuit between the air intake and air discharge side. Please refer to the necessary
minimum clearances given in the enclosed main dimension sheets.