67
Installation
EN
745
129
129
710
57
57
Fastening holes Ø10
281
162
660
522
Fastening holes Ø10
2.6 POSITIONING
It is recommended to place a rubber slab (hardness 60 shore,
thickness 10 mm) or properly sized anti-vibration supports
between the device and its support surface.
The unit should be raised off the ground, as follows:
• 100 mm for installations in ordinary zones.
• 300 mm for installations in zones that are extremely cold
or subject to heavy snowfall.
Adequate anti-freeze systems should be used for installa-
tions in zones that are extremely cold or subject to heavy
snowfall, where the possibility of freezing is present.
While operating in heating mode, the unit generates con-
densation, which will be deposited on the support surfa-
ce. This could freeze if the outdoor temperatures are be-
low zero, thus creating a hazard. In this case, appropriate
barriers should be installed in order to prevent people
from approaching the unit.
NXC 017-021
100
A
1
1
B
300
100
A
1
1
B
300
A Positioning in ordinary areas
B Positioning in very cold areas or with heavy
snowfalls
1 Rubber slab
2.7 INSTALLATION ON OLD SYSTEMS OR SYSTEMS IN
NEED OF UPGRADING
When the RIELLO NXC/NXH unit is installed on old systems or sy-
stems in need of upgrading, it is recommended to ensure that:
• the electrical system is compliant with the
• applicable regulations and has been installed by qualified
professionals
• the expansion tank ensures the complete absorption of
the fluid expansion contained within the system
• the system has been washed, cleaned of any sludge or
limescale deposits, and deaerated, and that all the seals
have been checked
• a treatment system has been installed if the supply/rein-
tegration water has particular characteristics.
In the event of a replacement, the system must be in-
spected by the designer or by another competent person,
and must be compliant with the technical requirements,
as well as the current legislations and regulations.
The manufacturer shall bear no responsibility for any da-
mages caused by incorrect system installation and/or the
failure to properly clean the water system.
2.8 SOURCE WATER SYSTEMS
The units require systems that guarantee a constant flow of
fluid to the device, within the minimum and maximum va-
lues, and with volumes that are sufficient for preventing any
imbalances in the cooling circuit and are capable of ensuring
the necessary comfort levels.
The device MAY NOT be installed on open tank systems.
Comply with the size indicated for the correct installation of
the unit.
NXC 017-021 Layout
NXC / NXH 026-040 Layout
NXC 026-040
NXH 026-040
