Check Safety and Operating Controls Monthly
To ensure machine protec t ion, the Control Test Auto mated Test should be do ne at least
once per month. See Tabl e 3 for safety control settings. See Table 8 for Cont rol Test functions .
Changing Oil Filter
Change the oil filter on a ye ar ly ba sis or when the machine is ope ned for repairs. The 19XL
has an isolatable oil filt er so that the filter may be c ha nged with the refrig er an t remaining in the
machine. Use the foll owi ng procedure:
1. Make sure that the compressor is off, and the disconnect for the compressor is open.
2. Disconnect the powe r to t he oi l pump.
3. Close the oil filter is ol ation valves (Figure 4).
4. Connect an oil chargi ng hose from the oil chargi ng valve (Figure 4), and place the other end
in a clean container suit able for used oil. The oil drained from the filter hou sing should be
used as an oil sample to be sent to a laborator y for proper analysis.

Do not con taminate this

sample

.
5. Slowly open the chargin g valve to drain the oil fro m the housing.