Water Connections - Riello NexPolar Series Installation And Technical Service Instructions

INSTALLATION

2.10 Water connections

The dimensions and positions of the R NexPolar unit's water
connections are shown in the following table.
Prior to installation, it is recommended to thoroughly wash all the
system's pipes in order to eliminate any processing residues.
1
2
3
100
150
197
1 System delivery
2 System return
3 Safety valve drain
Model 017 TE
Connections
System return 1-1/4
System delivery
Discharge
9
The selection and installation of the system's components are
the responsibility of the system's Installer, and must be carried
out in accordance with the standards of good practice, as well
as the current Legislation.
9
The safety valves' discharge must be connected to an adequate
collection and evacuation system. The device's manufacturer
is not responsible for any flooding caused by the safety valves'
intervention.
9
It is recommended to install a by-pass line in order to allow the
pipes to be washed without having to disconnect the device.
9
The connection pipes must be of an adequate diameter, and
must be supported in such a way that their weight will not be
borne by the device.
022 TE
1-1/4 Inches
1 1 Inches
1/2 1/2 Inches
9
Systems filled with antifreeze or other particular substances
required by law require the use of water backflow preventers.
9
For the calculation of the required glycol percentage, refer to
the table in chapter "Shutdown for extended periods", p. 41 .
9
Check the load losses of the device, the system, and of any oth-
er accessories mounted on the line.
9
Do not use the heat pump to treat industrial process water,
swimming pool water, or domestic water. In each of these cas-
es, an intermediate heat exchanger must be installed. In this
case, be sure to respect the minimum water contents by incor-
porating an accumulation tank if necessary.
9
If the device is to be connected in parallel to a boiler while it is
in function, make sure that the temperature of the water circu-
lating inside the heat pump does not exceed 60°C.
It is mandatory:
— To install a properly sized expansion tank.
— For models without water module, install an extractable
mesh water filter at the device's intake in a zone that's acces-
sible for maintenance, with characteristics of at least 10
mesh/inch , in order to protect the device against any impuri-
ties that may be present within the water.
— Following the system's installation and after each repair, the
entire system must be thoroughly cleaned, paying particular
attention to the status of the filter.
— Install air vent valves at the highest points of the pipes.
— Install flexible elastic joints to connect the pipes.
— In order to prevent the formation of ice during defrosting op-
erations, or the continuous modulation of the compressor's
frequency, make sure that the amount of water in the primary
circuit is greater than the minimum volume indicated in the
chapter titled "System water content" on p. 14 .
0
It is forbidden to operate the unit without the water filter in-
stalled and properly cleaned.
18