Carrier 17/19EX 用户手册

Adding Refrigerant

Follow the procedures described in

Charge Refrigerant into Machine

section.

Removing Refrigerant

When the optional pumpout system is used, the 17/19EX refrigerant charge may be

transferred to a storage vessel, or within the utility vessel. Follow procedures in the

Pumpout

and Refrigerant Transfer Procedures

section when removing refrigerant.

Adjusting the Refrigerant Charge

If the addition or removal of refrigerant is required for improved machine performance, follow

the procedures given under the

Trim Refrigerant Charge

section.

Always use the compressor pumpdown function in the Control Test mode to turn
on the evaporator pump and lock out the compressor when transferring refriger-
ant. Liquid refrigerant may flash into a gas and cause possible freeze-up when the
machine pressure is below 30 psig (207 kPa) for HFC-134a.

WARNING