Installation and Commissioning Guide - Advance Split Ducted Outdoor Unit
Doc. No.0525-085 Ver. 2 22xxxx
Installation and Commissioning Guide
Advance Outdoor Units
22
PRELIMINARY DATA ONLY
Ver. 2.04 220704
THIS LABEL TO BE REMOVED ON SIGN-OFF
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.
• 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.
To
Indoor Unit
See Diagram Below:
NITROGEN
HOSE
Evacuation Procedure (Triple Evacuation)
1. Fit service gauges to the ball valves (liquid line service valve and suction line service valve).
2. Evacuate the system to 1000 microns.
3. Check vacuum with vacu stat. Break the vacuum with dry Nitrogen to 100kPa.
4. Release Nitrogen pressure. Evacuate to 500 microns.
5. Check vacuum with vacu stat. Break the vacuum with dry Nitrogen to 100kPa.
6. Release Nitrogen pressure. Evacuate to 500 microns.
7. Check vacuum with vacu stat. Let the unit stand for 1 hour and with the vacuum not rising above 500 microns.
8. Open valve.
BRAZE
JOINTS
N
I
T
R
O
G
E
N
