Emerson Vilter VSS Installation, Operation & Maintenance Manual page 91

Section 5 • Maintenance/Service
Installation
8. Before reassembling,
thoroughly.
9. Install new filter element on internal port of
head assembly. Make sure filter element is
fully seated.
10. Lightly lubricate new O-ring with clean sys-
tem oil.
11. Install O-ring and replace the oil filter hous-
ing (canister) on oil filter Duplex head
Assembly. Hand-tighten only the oil filter
housing cover.
12. Using dry nitrogen gas, pressurize filter hous-
ing through bleed valve and check for leaks.
13. Evacuate filter housing to 29.88" Hg (1000
microns) and close bleed valve.
14. Install plug on bleed valve.
15. Pull switch lever and slowly rotate lever to
middle position to allow oil to fill filter hous-
ing. Allow a minimum of 5 seconds to fill
housing, then rotate lever back to second
filter.
16. Repeat for second oil filter, as required.
VSS/VSM/VSH/VSSH • Installation, Operation and Maintenance Manual • Emerson • 35391SD
clean all parts
Filter Element Replacement (Dual Oil Filter
Assembly)
WARNING
When working with refrigerants, ensure there is
adequate ventilation and refrigerant vapor detectors
as per ASHRAE standards. Failure to comply may
result in serious injury or death.
WARNING
Avoid skin contact with oil. Wear rubber gloves and a
face shield when working with oil. Failure to comply
may result in serious injury or death.
Change the oil filter as outlined in the Maintenance and
Service Interval, see Table 5-1. Maintenance & Service
Interval.
Ensure to check the oil pressure drop and record it
This procedure is for a compressor unit equipped with a
dual oil filter assembly only. One oil filter can be isolated
and serviced one at a time during operation. Note that
there is one oil filter head assembly for each oil filter. This
is different from duplex oil filters, where there is only one
oil filter head assembly for both oil filters.
See Table 5-3 for the parts required for an oil filter re-
placement, with their part numbers.
To replace an oil filter element, continue with the follow-
ing steps:
For filter housings with drain plugs only, replace
with O-ring (VPN 3111AB) after removing drain
plug. Drain plug and O-ring are not shown in this
procedure.
NOTE
daily.
NOTE
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