Installation and Commissioning Guide - Standard Commercial Split Ducted Commercial Outdoor Unit
Doc. No.0525-056 Ver. 7 220308
Installation and Commissioning Guide
Split Ducted Outdoor Units
20
11.02. Pressure Testing
Pressurize the system to 2500kPa in stages. A recommended pressure test is to be performed for no less than 1 hour at
2500kPa.
NOTES
Importance of Evacuation:
• Any non-condensable product left in the system can cause the pressure in the high side of the system to increase and in
turn, the compression temperature to rise.
• Moisture will result in adverse reaction in the refrigerant circuit.
• The POE oil used in the R-410A compressor is hygroscopic, which means that it absorbs moisture from the air. To prevent
chemical reactions in the system, any moisture must be removed at all costs.
• Oxygen (air) reacts with the compressor oil and can lead to faults such as compressor failure.
Detail B
Open
Hose
Nitrogen
Hose
N
I
T
R
O
G
E
N
Braze
Joints
To
Indoor Unit
A
See Diagram Below: See Diagram Below:
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