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3.2.
Insulating cold pipes
To prevent condensation on cold pipes of the chiller, the option insulation of the cold pipes must be specified
in case of high temperature differences between the environment and the cold water flow and taking into
account the relative humidity.
The insulation of the hydraulic pipes, connections and fittings installed by the customer must be vapour
diffusion-tight in accordance with the regionally applicable standards and regulations.
3.3.
Pump redundancy
Depending on the device model, a second pump can be used for redundancy reasons. If a second pump is
included, the pumps are switched at regular intervals (can be set e.g. to every 24h) in order to increase the
service life of the pump. This means that if a pump fails, the second pump is activated automatically and
therefore ensures secure operation.
3.4.
Phase monitoring
Compact-Line devices can also be optionally equipped so-called phase monitoring. It monitors phase
sequence, phase failure, under voltage and asymmetry and covers a voltage range of 200-690V. If the
respective predefined limits are exceeded the system switches off and protects the electrical components
installed in the unit.
3.5.
Hot gas bypass for output control <1K
If a more precise target constant than ±1 Kelvin is required, the chiller can be equipped with an output
control. In this case the output of the refrigeration circuit is adjusted to the cooling demand by an
electronically controlled valve. Unlike the standard control by switching compressors on or off, a higher target
constant is achieved by the continuous regulation of the valve.
3.6.
Low-temperature package (ambient temperature < -25 ° C)
If the chiller is operated at ambient temperatures below -25°C, the low-temperature package has to be
installed. With the use of additional heating and two non-return valves, this ensures a stable refrigerant
pressure in the refrigeration circuit at temperatures below -25°C.
At ambient temperatures < -25 °C install pipe trace heating (on site by customer).
To prevent frost damage, never switch off or disconnect the chiller from the power supply at ambient
temperatures < -25°C. If necessary, set the chiller to standby mode
Ensure that you always comply with the requirements with regard to the operating fluid and the mix ratio
3.7.
Levelling feet (accessories)
The levelling feet are used for vibration isolation and for height adjustment. They consist of a threaded rod
and a grey cast iron shell with an elastic element attached. The threaded rod enables the height to be
adjusted and compensates for floors sloping by up to 5°. The elastic element has a slip-resistant covering.
Figure 4: Machine base (foot) - outside view
and
Figure 5: Machine base (foot) - mounting on the baseplate
show the installed machine foot – the technical drawing is given in the appendix. (Attention: Not allowed in
combination with the earthquake kit)
The Seismic feets (
Figure 6: Seismic feets are used for seismic and high wind gust regions
)
are used for
seismic and high wind gust regions
A height adjustment is not possible with these feet.
The following units are equipped with the seismic feet as standard:
909040-00743, 909040-00744, 909060-00424, 909070-00425, 909100-00469, 909120-00471,
909120-00472