Carrier 19XL - Manual (Page 128)

Leak Test Machine
Due to regulations regarding refrigerant emissions and the difficulties associated with
separating contaminants from refrigerant, Carrier recommends the following leak test
procedures. See Figure 26 for an outline of the leak test procedures. Refer to Figure 27 and
Figure 28 during pumpout procedures and Table 5A , Table 5B , Table 5C , and Table 5D for
refrigerant pressure/temperature values.
1. If the pressure readings are normal for machine condition:
a. Evacuate the holding charge from the vessels, if present.
b. Raise the machine pressure, if necessary, by adding refrigerant until pressure is at
equivalent saturated pressure for the surrounding temperature. Follow the pumpout
procedures in the Transferring Refrigerant from Storage Tank to Machine section,
Steps 1a - e.
Do not use air or oxygen as a means of pressurizing the machine. Some mixtures
of HCFC-22 or HFC-134a and air can undergo combustion.
WARNING
!
WARNING
Click here for Figure 26 — 19XL Leak Test Procedures