Kaden KD Series, Installation Manual

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24 | Kaden Installation Manual
8. Leak testing and evacuation
Leak, pressure test and evacuation
The interconnecting pipe work and indoor unit must be
pressure tested at 1000kpa and leak tested before being
evacuated. Before using the manifold gauge and vacuum
pump, read their operation manuals to familiarise yourself
with how to use them properly.
Fig. 8.1
1. Connect the charge hose of the manifold gauge to the
outdoor unit’s low pressure valve.
2. Connect another charge hose from the manifold gauge
to the vacuum pump.
3. Monitor test pressure and check with a leak detector
and bubble solution. Safely release the test pressure.
4. Open the Low pressure side of the manifold gauge.
Keep the High pressure side closed.
5. Turn on the vacuum pump to evacuate the system.
6. Evacuate the interconnecting pipes to <=500 microns.
7. Close the low pressure side of the manifold gauge,
and turn off the vacuum pump.
8. Wait for 5 minutes, then check that there has been no
change in system vacuum.
9. If the vacuum does not settle, repeat from Step 1 of
Leak, pressure test and evacuations. If there is no
change in system vacuum, unscrew the cap from the
packed valve (high pressure valve).
MC MC
Manifold gauge
Compound gauge
-76cmHg
Low pressure valve
Pressure hose/
charge hose
Pressure gauge
High pressure valve
Charge hose
Vacuum
pump
Low pressure
valve