Installation and Commissioning Guide - Classic 2 Split Ducted Outdoor Unit
Doc. No.0525-073 Ver. 8 210414
Installation and Commissioning Guide
Classic 2 Outdoor Units
24
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.
IMPORTANT
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.
BRAZE
JOINTS
To
Indoor Unit
See Diagram Below:
N
I
T
R
O
G
E
N
NITROGEN
HOSE
11.03. 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.
TO OPEN TURN ANTI-CLOCK WISE (1/4 TURN)
TO CLOSE TURN CLOCK WISE (1/4 TURN)
(As Shipped Position)
(Operating Position)
CLOSE
OPEN
TO OPEN TURN ANTI-CLOCK WISE (1/4 TURN)
( As Shipped Position )
CLOSE
TO CLOSE TURN CLOCK WISE (1/4 TURN)
( Operating Position )
OPEN
OPEN
CLOSED
Wrench Key
( OPEN = Operating Position )
( CLOSED = As Shipped Position )
