1
8
OUTDOOR UNIT INSTALLATION
6.1 Remove the protective cap from the low and high pressure service valves of the outdoor unit.
6.2 Connect the manifold gauge pressure hose to the low pressure service port valve.
6.3 Connect the charge hose from the manifold gauge to the vacuum pump.
6.4 Open the low pressure valve on the manifold gauge and close the high pressure valve.
6.5 Turn on the vacuum pump to vacuum the system.
6.6 The vacuum time should not be less than 15 minutes, or when the compound gauge indicates
-0.1 MPa (-76 cmHg).
6.7 Close the low pressure valve of the manifold gauge and turn off the vacuum.
6.8 Hold the pressure for 5 minutes, making sure that the rebound of compound gauge pointer
does not exceed 0.005 MPa.
6.9 Open the low pressure valve counterclockwise for 1/4 turn with a closed socket wrench to let
a little refrigerant fill into the system. Close the low pressure valve after 5 seconds and quickly
remove the pressure hose.
6.10 Check all indoor and outdoor joints for leakage with soapy water or leak detector.
6.11 Fully open the low pressure valve and high pressure valve of the outdoor unit with a closed
socket wrench.
6.12 Replace the protective caps of the service ports.
6.13 Replace the valve cover.
Step 6: Vacuum Pumping
Compound Gauge
Low Pressure Valve
Service Port
High Pressure Valve
Valve Protective Caps
Pressure Hose
Manifold Gauge
Vacuum Pump
Pressure Gauge
High Pressure Valve
Low Pressure Valve
Charge Hose
OUTDOOR UNIT INSTALLATION
