Mammoth V-Cube - Manual (Page 31)

4. Install the recommended size suction 4. line filter
drier and new size liquid line filter drier. Evacuate sys-
tem using the triple evacuation method. Re-charge
the system with new refrigerant (do not use the re-
covered refrigerant). See unit’s nameplate for proper
refrigerant charge.
5. Start the compressor and put the system in opera-
tion. As the contaminants in the system are filtered
out, the pressure drop across the suction line filter
drier will increase. Observe the differential across the
filter drier for a minimum of two hours. If the pres-
sure drop exceeds the maximum limits for a tempo-
rary installation, replace the filter drier and restart the
system (see literature from filter drier’s manufacturer
for pressure drop maximum limits.)
6. After the completion of Step 5, allow the unit to op-
erate for 48 hours. Check the odor (warning – smell
cautiously) and compare the color of the oil with
the sample taken in Step 2. Use of an Acid Test Kit
is recommended to test for acid content. If the oil is
discolored, has an acid odor, is acidic or if the mois-
ture indicator indicates a high moisture content in
the system, change the filter driers. The compressor
oil can be changed if considered desirable. Allow the
system to operate for an additional four hours, and
recheck as before. Repeat until the oil remains clean,
odor and acid free and the color approaches that of
the original sample.
7. Replace the liquid line filter drier with one of the
normally recommended size. Remove the suction line
filter drier.
8. After the cleaning procedure is completed, recheck in
approximately two weeks to ensure that the system
condition and operation is completely satisfactory.
VCES-V-CUBE-IOM-1A 31