16
EN
Complete insulation of refrigerant tubes; wrap with armoning tape. Fix and support tubes with brackets. Seal
hole in the wall, if necessary.
M
Pump down means collecting all refrigerant gas in the system back into the outdoor unit without losing gas. Pump
down is used when the unit is to be moved of before servicing the refrigerant circuit.
Connect a valve manifold to the charge port on a
wide tube service valve, partially open it (1/4 turn).
Let the air purge from the manifold. Fully close the
narrow tube service valves all the way.
B
Turn on the unit’s operating switch and start
cooling operation. When the low-pressure gauge
reading falls to 1 to 0,5 Kg/cm
2
, close the wide
tube valve and then quickly turn off the unit.
Remove the valve manifold.
Repeat the operations for each circuit
At that time, PUMP DOWN has been completed
and all refrigerant gas will have been collected in
the outdoor unit.
A
High pressure
Low pressure
12 - PUMP DOWN PROCEDURE
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