26 18.01._5280107_02
NRL 0280-0750 °-L / A-E
EN
..........................................................
1. The choice and installation of compo-
nents outside the units is the installer's
responsibility, who must operate ac-
cording to the code of practice and in
compliance with the Standard in force
in the country of destination.
2. The hydraulic connection pipes to the
machine must be suitably dimen-
sioned for the effective water flow rate
requested by the system when run-
ning. The water flow rate to the heat
exchanger must always be constant.
3. Wash the system thoroughly before
connecting the unit. This cleaning
operation will eliminate any residues
such as welding drips, scale, rust, or
other impurities from the piping. These
substances can also deposit inside and
cause machine malfunctioning. The
connection piping must be adequate-
ly supported so that its weight is not
borne by the appliance.
4.
system must be prepared (if not in-
stalled), which is engaged on the re-
turn line, along with a drain cock in
the lowest part of the system. Water
disconnectors must be used in systems
loaded with anti-freeze or where par-
ticular legal provisions apply. Particular
supply/reintegration waters must be
conditioned with appropriate treat-
ment systems. The "water features"
provided in the table can be used as a
reference.
5. It is prohibited to release water-glycol
mixtures into the environment.
6. It is recommended to design systems
in order to limit:
• The hourly number of inversions be-
tween operating modes.
• Drop in water temperature during win-
ter defrost cycles.
PH 6-8
Chloride ions
Sulphuric acid ions
Sulphur ions none
Ammonia ions None
Silicone ions
NRL 01-03
NRL 01-03
5
1
10
15
2
13
COMPONENTS SUPPLIED AS PER STANDARD
1
- Plate exchanger
2 - Water filter
3 - Fow switch
4 - Air vent valve
5 - Water temperature probes (IN/OUT)
7 - Cut-off valve
8 - Safety valve
9 - Expansion Tank
10 - System buffer tank (installaon recommended whenever the system water content is less than that
indicated in tab.)
11 - Anfreeze electric heater
12 - Pump
13 - Drain valve
RECOMMENDED COMPONENTS NOT SUPPLIED FOR WHICH INSTALLER IS RESPONSIBLE
6 - An-vibraon joints
7 - Cut-off valve
14 - Gauge
15 - Automac fill point
NRL
0280
NRL
0300
NRL
0330
NRL
0350
NRL
0500
NRL
0550
NRL
0600
NRL
0650
NRL
0700
NRL
0750
n°/n° 2/2 2/2 2/2 2/2 3/2 3/2 4/2 4/2 4/2 4/2
l/kW
7 7 7 7 5 5 4 4 4 4
l/kW
14 14 14 14 10 10 8 8 8 8
Compressors / Circuits
Minimum recomended water content
Minimum recomended water content
*
Control on leaving water temperature.
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