D
–EIMAC01905-23_00EN - 31/53
Fig. 22.
– Multiple Chiller Installation
4.5
Noise and sound protection
The unit is a source of noise mainly due to rotation of compressors and fans.
The noise level for each model size is listed in sales documentation.
If the unit is correctly installed, operated and maintained, the noise emission level do not require any special protection
device to operate continuously close to the unit without any risk.
In cases where the installation is subject to compliance with special sound requirements, it may be necessary to use
additional noise attenuation devices. It is necessary to isolate the unit from its base with extreme care, correctly applying
the anti-vibration elements (supplied as optional). Flexible joints must be installed on the water connections, as well.
Fig. 23 - Anti-vibration elements (supplied as optional)
4.6
Water circuit for unit connection
Water piping
Piping must be designed with the lowest number of elbows and the lowest number of vertical changes of direction. In this
way, installation costs are reduced and system performance is improved.
Water system must have:
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Anti-vibration mountings in order to reduce transmission of vibrations to thewhole structure.
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Isolating valves to isolate the unit from the water system during maintenance.
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In order to protect the chiller, the evaporator must be protected against freezing by continuous monitoring of the
water flow in the evaporator itself by a flow switch. In most cases, on site, the flow switch is set to generate an
alarm only when the water pump turns off and the water flow drops to zero. It is recommended to adjust the flow
switch to produce a "Water Leakage Alarm" when the water flow reaches 50% of the nominal value; in this case
the evaporator is protected against freezing and the flow switch can detect the clogging of the w ater filter.
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A m
anual or automatic air venting device at the system’s highest point and a drain device at the system’s lowest
point.
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Neither the evaporator nor the heat recovery device must be positioned at the system’s highest point.