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Translation from original instructions
6.4 Hydraulic connections
When preparing to make the hydraulic circuits, it is good practice to comply with the following instructions and in any case
follow the national and local regulations (refer to the layouts included in the manual).
Fit the pipes to the unit using flexible couplings in order to prevent transmission of vibrations and compensate thermal
expansion. (Proceed on the pumps unit in the same way).
Install the following components on the pipes:
- Temperature and pressure indicators for normal maintenance and control of the unit.
- Wells on the inlet and outlet pipes for temperature measurements, if temperature indicators are not present.
- Shut-off valves (ball gate valves) to isolate the unit from the hydraulic circuit.
- metal mesh filter with a mesh size no larger than 1 mm, situated on the exchanger inlet pipe, to protect the exchanger
from slag or impurities in the pipes.
- Air valves, to be placed in the highest parts of the hydraulic circuit, to allow the non-condensable gases to be bled off.
- Expansion vessel and automatic charging valve for maintaining system pressure and to compensate thermal expansion.
- Drain valves, so that the system can be emptied for maintenance operations or seasonal stops.
It is mandatory to comply with the above requirements to facilitate the hydraulic connection operations and
the maintenance operations.
The installation of a safety valve on the hydraulic circuit is strongly recommended. In the event of serious
anomalies in the system or exceptional events (e.g. a fire breaks out), this will allow the system to be drai-
ned to prevent possible bursting.
It is mandatory to fit the metal mesh filter on the water inlet pipe. If the metal filter is not fitted, the warranty is
voided immediately.
If the flow switch is supplied separately, it is mandatory to install it at the water outlet connection of the chil-
led water circuit. If the flow switch is not installed, the warranty is voided immediately.
The basic unit has a relay for management of a user-side pump and a relay for management of a source-si-
de pump.
