Unical HP OWER 60, User'S And Installer'S Manual

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HP-OWER
8
Models A B* C D E**
HP_OWER 60 1500 500 400 400 500
HP_OWER 90 1500 500 400 400 500
HP_OWER 120 1500 500 400 400 500
HP_OWER 150 1500 500 400 400 500
* The recommended minimum distance for installation and maintenance.
** The recommended minimum distance for assistance and maintenance
5.4 HYDRAULIC CONNECTIONS
The hydraulic connections have to be installed in accordance with national and local regulations; pipes can be made up of steel,
galvanized steel or PVC. Pipes have to be designed depending on the nominal water flow and on the hydraulic pressure drops of
the system. All pipes have to be insulated with closed-cell material of adequate thickness. Chillers have to be connected to piping
by means of flexible joints. Piping should include:
•
Hole thermometers to monitor the system’s temperature.
• Manual gate valves to separate the chiller from the hydraulic circuit.
• Y-shaped metallic filter (to be mounted on the inlet pipe) with a mesh not larger than 1mm.
• Charging group and discharge valve, where necessary.
WARNING: Make sure that, when designing the pipe length and diameter, do not exceed the maximum head loss
on the plant side, please see the technical data given in the table of Paragraph 12 (available pressure head).
WARNING: Connect the pipes to the attacks by using always key against key system.
WARNING: The expansion vessel have a limited volume. The installator have to provide a further expansion vessel
if it is necessary.
WARNING: Unit water inlet pipe have to be in correspondence with the connection labelled: ”WATER INLET”,
otherwise the evaporator may freeze.
WARNING: It is compulsory to install on the WATER INLET connection a metallic filter with a mesh not larger than
1mm. Should the water flow switch be altered or should the filter not be installed, the warranty will no longer be
valid. The filter have to be kept clean, so make sure it is clean after the unit has been installed, and then check it
periodically.
All units are standard supplied with the water flow switch (factory installed). Should the water flow switch be
altered, removed, or should the water filter not be installed on the unit, the warranty will be invalidated. Please
refer to the wiring diagram for the water flow switch electric connections.
1. Vibration-damping joint
2. Gate valve
3. Filling / Drain valve
4. Differential by-pass
5. Filtre
6. System expansion vessel
Heating / Cooling system