Pumping down an HVAC system is routinely done for many reasons, such as moving a unit, replacing the line-set, or general repairs.
Some basic HVAC tools will be needed.
What Is Pumping Down an Mini Split System?
When an HVAC unit is pumped down, all the refrigerant is pulled into the outside condenser for storage.
Most all mini split systems come with the refrigerant stored in the outside condenser and released into the system after being vacuumed down.
Pumping down a unit is placing the unit back into its original state of storage.
Tools Needed Pump Down a Mini Split HVAC System
HVAC gauges will be needed to watch the pressure on the low side gauge.
An Allen key is also needed to shut off the high and low-pressure valves to lock the refrigerant inside.
A screwdriver will be needed to remove the cover and wrench to remove the caps protecting the valves.
Read Here for a Full List of Tools for Working on a Mini Split Unit.
Steps To Pump Down a Mini Split HVAC System