Sound Protection; Water Piping; Figure 5 - Minimum Recommended Installation Clearances - Daikin EWYD-BZ Series Installation, Maintenance & Operation Manual

Figure 5 - Minimum recommended installation clearances

Distances shown in previous figures have not be considered a warranty for good installation; particular conditions (like
venturi effects due to wind, very tall buildings, etc.) may cause air recirculation so affecting unit performances. It is a
responsibility of the installer to assure that the unit condenser is fed with fresh air in any condistions

Sound protection

When sound levels require special control, great care must be exercised to isolate the machine from its base by
appropriately applying anti-vibration elements (supplied as an option). Flexible joints must be installed on the water
connections, as well.

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 considerably and system performance is improved.
The water system should have:
1 Anti-vibration mountings in order to reduce transmission of vibrations to the underlying structure.
2 Isolating valves to isolate the machine from the water system during service.
3 Manual or automatic air venting device at the system's highest point; drain device at the system's lowest point.
Neither the evaporator nor the heat recovery device must be positioned at the system's highest point.
4 A suitable device that can maintain the water system under pressure (expansion tank, etc.).
5 Water temperature and pressure indicators on the machine to assist the operator during service and
maintenance.
6 A filter or device that can remove foreign particles from the water before it enters the pump (in order to prevent
cavitation, please consult the pump manufacturer for the recommended type of filter). The use of a filter prolongs
the life of the pump and helps keep the water system in a better condition.
7 Another filter must be installed on the machine inlet water pipe, near the evaporator and heat recovery (if
installed). The filter prevents solid particles from entering the heat exchanger, as they could damage it or reduce
its heat exchanging capacity.
8 The shell and tube heat exchanger has an electrical resistance with a thermostat that ensures protection against
water freezing at ambient temperatures as low as –25°C. All the other water piping outside the machine must
therefore be protected against freezing.
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