Source Water Systems; System Water Content; Water Flow Rate - Riello NexPolar Series Installation And Technical Service Instructions

INSTALLATION
— the system has been washed, cleaned of any sludge or limes-
cale deposits, and deaerated, and that all the seals have been
checked
— an adequate treatment system has been installed if the sup-
ply/reintegration water has particular characteristics (see the
chapter titled "Water quality requirements" on page p. 20 )
9
In the event of a replacement, the system must be inspected
by the designer or by another competent person, and must be
compliant with the technical requirements, as well as the cur-
rent legislation and regulations.
9
The manufacturer shall bear no responsibility for any damag-
es caused by incorrect system installation and/or the failure to
properly clean the water system.
2.9

Source water systems

The heat pumps require systems that guarantee a constant flow of
fluid to the device, within the minimum and maximum values, and
with volumes that are sufficient for preventing any imbalances in
the cooling circuits and are capable of ensuring the necessary com-
fort levels.
0
The device MAY NOT be installed on open tank systems.
2.9.1

System water content

In order to ensure the device's proper operation, a minimum vol-
ume of water must be guaranteed within the system's primary cir-
cuit.
9
This minimum volume is necessary in order to prevent the for-
mation of ice during defrosting operations, or the continuous
modulation of the compressor's frequency.
It also provides for the following advantages:
— decreased wear to the device
— increased system yield
— improved temperature stability and precision
• The minimum volume is calculated based on the following for-
mula:
• Vmin = Cnom x N
Vmin Minimum system volume in litres
Cnom Nominal capacity in cooling mode under the conditions
foreseen for the system, in kW N
N Multiplication factor
application
Cooling
Heating or domestic hot water
If the minimum volume is not reached, a properly sized accumula-
tion tank must be installed.
2.9.2
The water flow rate must be maintained constant while the device
is in operation, and must respect the limit values indicated in the
following table:
Model
Plumbing characteristics
Minimum
water flow
rate
Maximum
water flow
rate
N
3,5
6
14

Water flow rate

017 TE 022 TE
1,6
5,0
2,0 m³/h
5,8 m³/h