USER and
MAINTENANCE
MANUAL
17
HYDRAULIC CONNECTION
8.1 HYDRAULIC CONNECTION TO THE EXCHANGER
8
Warning: during the hydraulic connections, never operate with naked
flames near or inside the unit.
If the integrated inverter is not provided with the machine (i.e. is
supplied directly by the manufacturer), the hydraulic circuit should
be set up in such a way as to guarantee a constant flow of water to the
exchanger in all operating conditions. If this is not the case, the risk of
refrigerant returning in the liquid state to the compressor input would
be run, with the danger of breakage of the same.
It is of fundamental importance that the water inlet is installed where the
connection is marked with the following plate:
CHILLED WATER
Otherwise, the evaporator could freeze as the anti-freeze thermostat check
would be annulled.
8.2 MINIMUM WATER CONTENT IN THE PLANT
The compressors can run intermittently; this is because the amount of cooling power required by the
unit is not generally the same as that provided by the machine�
It is necessary to guarantee inertia on the system such to limit oscillation of the water temperature within
the limits that do not compromise the good functioning of the unit and, at the same time, guarantee
good stability at the water flow temperature towards the utility� The mathematical formula below is for
calculating the minimum water content on the side of the plant:
V
min
≥ P
tot
x (5 : 20)*
V
min
: water content of the plant [l]
P
tot
: power capacity of the unit [kW]
V
min
If the above mentioned volumes are not reached, a storage tank must be set up for its capacity
together with that of the system to reach the relative value�
This tank does not require particular set-ups� It must however be carefully isolated like all chilled water
pipes, in order to prevent condensation and not to affect system performance�
8.3 HYDRAULIC CONNECTION TO THE RECOVERY CONDENSER
OR SANITARY HOT WATER
For all units with heat recovery, the connections of the hydraulic circuit related, consist of male threaded
pipes (depending on size)�
For units equipped with heat recovery is essential to follow the following instructions:
*5 litres = to safeguard the compressor
20 litres = for better efficiency of the system
Summary of Contents for PURPLE
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