To equalize the pressure differential on a refrigerant isolated 19XL machine, use the TERMINATE LOCKOUT function of the Control Test in the SERVICE menu. This will help to turn on pumps and advise the proper procedure. The following procedure describes how to equalize refrigerant pressure on an isolated 19XL machine without a pumpout unit:

1.Access TERMINATE LOCKOUT function on the Control Test.

2.Turn on the chilled water and condenser water pumps to ensure against freezing.

3.Slowly open the refrigerant cooling isolation valve. The machine cooler and condenser pressures will gradually equalize. This process will take approximately 15 minutes.

4.Once the pressures have equalized, the condenser isolation valve, the optional hot gas isolation valve, and cooler isolation valve may now be opened. Refer to Figure 27 and Figure 28, Valves 11, 12, and 14.

WARNING ! WARNING

Whenever turning the discharge isolation valve, be sure to re-attach the valve locking device. This will prevent the valve from opening or closing during service work or during machine operation.

Click here for Table 8 — Control Test Menu Functions

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Carrier PC211 specifications Click here for Control Test Menu Functions