Reznor MASA Unit Installation Manual - Manual (Page 31)

Form I-COND, P/N 220746R6, Page 31
TABLE 10 -
Compressor Oil
Charge
MASA Size 060 090 120 150 180 240
Circuit A B A B A B A B A B A B
Compressor ZP20K ZP39K ZP29K ZP57K ZP39K ZP83K ZP54K ZP103K ZP57K ZP120K ZP83K ZP154K
POE Oil (oz.) 34 38 21 52 38 56 62 106 52 106 56 106
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Step 3. Mount the Replacement Compressor
Do not remove the dust cover or rubber shipping plugs until all other sys-
tem connections are complete (i.e. new liquid line filter drier(s) installed
and all tubing changes made - see Steps 4 and 5). The amount of time the
compressor is open to the atmosphere must be kept to a minimum.
Use the new mounting grommets and sleeves that are shipped with the
compressor to mount it. The sleeves will prevent over compression of
the grommets. Re-use the mounting bolts from the compressor that was
removed. The mounting bolts will bottom out when tight.
□
Step 4. Install New Filter Driers (Select procedure that applies.)
IF the oil measured in Step 2 was not significantly less than the amount
shown in TABLE 10 or the test for acid in Step 2 did NOT indicate burn-
out , install a new R-410A refrigerant liquid line filter drier. The filter drier
must be rated for no less than 600 psig and be the proper size for the
circuit. Because R-410A refrigerant requires POE oil which absorbs mois-
ture quickly, it is important to change the filter drier any time the circuit is
opened.
It is recommended to use a tubing cutter when cutting out a filter drier as
the desiccant absorbs and holds moisture better when it is cool. Heat from
a torch may cause moisture to leave the filter and be absorbed in the oil.
Continue to Step 5.
IF the oil measured in Step 2 was significantly less than shown in TABLE
10 or the test for acid in Step 2 did indicate compressor burnout, do the
following:
a) Install a liquid line filter drier. If there is acid, install an acid removing
filter drier. Size the acid-removing filter drier at least one capacity size
larger than normally required for the circuit.
d) Remove the mounting bolts and the compressor. Save the mounting
hardware to attach the grommets and sleeves shipped with the replace-
ment compressor.
e) To test for acid and to assure excess oil does not remain in the circuit,
remove oil from the failed compressor. Measure the amount of oil.
CAUTION
In addition to the required eye protection and gloves, care
should be taken in handling POE oil because it may cause
damage to certain plastics and roofing materials. See Hazard
Levels, page 3.
If the oil taken from the compressor and measured is found to be signifi-
cantly lower than listed in TABLE 10, clean the excess oil through use
of suction and liquid line filter driers. Beginning in Step 4, follow the
same procedure as for burnout cleanup.
Use an acid test kit to check the oil for acid. If acid is found, begin-
ning in Step 4, follow procedures indicated for burnout cleanup.
Dispose of oil and compressor using an approved environmentally safe
disposal method.