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Section 5 • Maintenance/Service
Filter Element Replacement (Duplex 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
duplex oil filter assembly only (VPN 3109A and 3110A
oil filter housings). One oil filter can be isolated and ser-
viced one at a time during operation. Note that there
is one oil filter head assembly for both oil filters. This is
different from dual oil filters, where each oil filter has its
own oil filter head assembly.
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:
Oil Filter Duplex
Head Assembly
Oil Filter
Switch Lever
Oil Filter
Element
Oil Filter
Housing
O-ring
Oil Filter
Housing Cover
Oil Filter
Drain Valve
5 – 16
NOTE
daily.
VSS/VSM/VSH/VSSH • Installation, Operation and Maintenance Manual • Emerson • 35391SD
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
Removal
(Reference Figure 5-11)
Dispose of used oil in an appropriate manner following
all Local, State and Federal laws and ordinances.
1.
Pull switch lever and switch over to second filter.
2.
Remove plug from bleed valve.
3.
If needed, attach a hose with 1/4" male adapter
to bleed port to aid in controlling the flow of dis-
charged oil.
4.
Using a drain pan, slowly open bleed valve to re-
duce pressure and allow oil to completely drain
from filter housing.
5.
Remove oil filter housing cover and O-ring from oil
filter housing. Discard O-ring.
6.
Remove filter element from internal port of head
assembly.
7.
Clean filter element connection area of head as-
sembly and interior of filter housing.
Figure 5-11. Duplex Oil Filter Assembly (VPN 3110A
Double Oil Filter Housing Shown)
NOTE
procedure.
NOTICE
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