Vacuum Pump Attachment And Evacuation Procedure - Panasonic OCU-CR1000VF8A Service Manual

Vacuum Pump Attachment and Evacuation Procedure

Evacuation should be performed after completing the airtight test.
Caution
Please follow local regulations and EN378.
1. Vacuum pump attachment and piping connection
1) Connect the joint valve of the service piping (SPK-TU125) and the manifold gauge set
exclusively for CO
2) Connect a vacuum pump, CO
charge hose or 1/4" pipe.
Note： The low side gauge for this operation should be able to indicate the vacuum level to
be reached (-0.1MPa).
Service piping
Joint valve
2. Evacuation
1) Set the evacuation mode in accordance with
"Evacuation Mode".
2) Set the low pressure and high pressure service
valves to the back seated position (the access
ports are open), and operate the vacuum pump.
3) Continue the evacuation until the low side gauge
indication reaches -0.1MPa and continue
evacuation for an additional 1 to 3 hours.
Note: When the intended vacuum level (-0.1MPa) cannot be reached after 2 hours, check
the setup for any leaks.
refrigerant by using a CO
2
refrigerant cylinder, and the manifold gauge set by using a
2
Low pressure service valve
High pressure service valve
Vacuum pump
charge hose or 1/4" pipe.
2
CO manifold gauge set
2
Low side
gauge
10
High side
gauge
Charging
valve
CO charge hose or
2
1/4" pipe
Access port is open.
Back seated positon
Turn the stem fully
counterclockwise