Nibe ACVM 270, Installation And Maintenance Instructions Manual

Page: 24 / 96

NOTE
Gas shielding must be used when soldering.
Flare connections
Expansion:
A
A (mm) Outer diameter, copper pipe (mm)
13.2 Ø9.52
19.7 Ø15.88
Ejection:
B
B, with a conven-
tional tool (mm) B, with an R410A
tool (mm) Outer diameter,
copper pipe (mm)
0.7~1.3 0.0~0.5 Ø9.52
Ø15.88
(Follow instructions for the tool used.)
Pressure test and leak test
Both ACVM 270 and AMS 10 are pressure tested and leak
tested at the factory, but the pipe connections between
the products must be checked after installation.
NOTE
The pipe connection between the products must be
pressure tested and leak tested according to the ap-
plicable regulations after installation.
Under no circumstances must a type of medium other
than nitrogen be used when pressurising or flushing
the system.
Vacuum pump
Use a vacuum pump to evacuate all air. Apply suction for
at least one hour and end pressure after evacuation must
be 1 mbar (100 Pa, 0.75 Torr or 750 micron) absolute
pressure.
If the system has remaining moisture or a leak, the vacuum
pressure will rise after completed evacuation.
Vacuum
pump
Serviceventil, gas
Mätuttag
Manometer
Serviceventil, vätska Service valve, liquid
Service valve, gas
Measurement outlet
Pressure
gauge
Vacuum
pump
TIP
For a better end result and to quicken the evacuation,
the following points must be followed.
■
The connection lines must be as large and short as
possible.
■
Evacuate the system down to 4 mbar and fill the
system with dry nitrogen to atmospheric pressure
to the finish the evacuation.
Filling refrigerant
AMS 10 is delivered complete with the refrigerant required
for the installation of refrigerant pipes up to 15 m in
length.
If the length of the refrigerant pipes exceeds 15 m, extra
refrigerant must be added at a rate of 0.06 kg/m.
NOTE
For installations with refrigerant pipes up to 15 m in
length, no extra refrigerant in addition to the
provided amount needs to be added.
When carrying out pipe connections, pressure tests, leak
tests and vacuuming, the service valves (QM35, QM36)
can be opened, to fill the pipes and ACVM 270 with refri-
gerant.
NIBE™ SPLIT ACVM 270 24
For the Installer
Pipe installation