Pumping Down an AC or Refrigeration System
- Switch off the air conditioning unit
- Connect the manifold to the low pressure service valve
- Using your refrigeration service tools, release the nut on the service valve, to a mid-way position between fully opened and fully closed. You should see that that the pressure gauge reading will increase on the manifold gauge.
- Operate the air conditioning unit for 3 to 5 minutes,
- Isolate the liquid line by closing off the liquid line service valve. You should start to see the reducing pressure reading on the manifold gauge.
- Once the pressure reads zero, isolate the vapour line service valve by closing the service valve off,
- Evacuate the system after the repair and maintenance work by using a high performance Javac Vacuum Pump to 25 microns or less. This step is very important otherwise your system will not operate correctly. This is to remove the moisture and oxygen.
- Next open the service valves and wait for 5 minutes for the refrigerant to disperse.
- You may now turn of the air conditioning or refrigeration unit.
- It is suggested that you use a Hand Held Leak Detector to check for any leaks around any new joins or changes to the refrigerant piping.
Contact us anytime using the chatbox at the bottom of the page or signup to our mailing list to be the first to know when we offer our next great deal on a full range of NZ HVAC TOOLS. Or call us NZ Free Call 0800 483 353.
HVAC TOOLS Limited is a NZ GST registered company New Zealand NZ BN 9429046513991.
Browse our HVAC NZ Service Tools range :
Need something else? Get in touch :
Call us NZ Free Call 0800 483 353
Email us : email@example.com
or chat with us