Nibe HBS 05 Series, Installer Manual

Page: 18 / 52

Pressure test and leak test
Both HBS 05 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 accord-
ing to the applicable regulations after installa-
tion.
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) abso-
lute pressure.
If the system has remaining moisture or a leak, the vacu-
um 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 fol-
lowed.
■ 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 re-
quired for the installation of refrigerant pipes up to 15
m in length.
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 HBS 05 with refriger-
ant.
Insulating refrigerant pipes
■
Insulate refrigerant pipes (both gas and liquid pipes)
for heat insulation and to prevent condensation.
■
Use insulation that can withstand at least 120 °C.
Poorly insulated pipes can cause insulation related
problems and unnecessary cable wear.
Principle:
Wires for connecting indoor
and outdoor units
Exterior tape
Gas piping
Insulation
Liquid piping
Wiring
Liquid pipe
Tape
Gas pipe
Insulation
Connections:
Band (accessory)
Pipe cover (accessory)
Strap
Pipe protection
HBS 05 Chapter 4 | Pipe connections 18