Air Purging And Refrigerant Charge - Lennox 4 Series Installation Manual

6.0.

AIR PURGING AND REFRIGERANT CHARGE

6.1. Air Purging
1. The outdoor unit has been pre-charged before shipment. Additional refrigerant charge may be
required during the field installation.
2. Ensure the liquid valve and the gas valve of the outdoor unit are closed fully.
3. As shown in Figure 9, expel the gas inside the indoor unit and refrigerant pipe out using vacuum
pump.
Figure 9: Expelling Gas from the Indoor Unit and Refrigerant Pipe
NOTICE:
• When the compressor is not running, charge the R410A refrigerant into the refrigerant pipe from the
liquid valve of the outdoor unit (not from the gas valve).
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LENNOX MULTI SPLIT INVERTER
Outdoor Unit
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