Adding Refrigerant
Follow the proce dures described in Trimming Refrig erant Charge section.
Removing Refrigerant
If the optional pumpout system is used, the 19XL refrigerant charge may be transferred to a
storage vessel, or withi n the condenser or coole r . F oll ow procedures in the Pump out and
Refrigerant Transfer Procedures section when removing refrigerant from the s torage tank to the
machine.
Adjusting t h e Refrigerant Charge
If the addition or removal of refri gerant is required for improved machine performance, fol low
the procedures g iven under the Trim Refrigerant Charg e section.
Always use the compre sso r Pumpdown function in the Co ntrol Test table to turn
on the evaporator pump and lock out the compresso r w hen transferring refri ge r-
ant. Liquid refrige rant may flash into a gas and ca use possible freeze-u p when the
machine pressure is be low 65 psig (448 kPa), for HC FC -22, 30 psig (207 kPa) for
HFC-134a.
WARNING !WARNING