Wilkerson F28 - Manual (Page 2)

rotate the drain knob counter-clockwise one or two turns* (viewed from
below).
3 Before returning unit to service, insure that all seals have been
reinstalled or replaced and bowl is locked into position with
drain properly secured.
4. If the unit has the optional Differential Pressure Indicator, RED
indicates that the filter element needs to be replaced (Refer to
Step 1). If the indicator no longer functions, it must be replaced.
*NOTE: IN THE EVENT THE DRAIN kNOB IS OVER-ROTATED, IT MAY
BECOME DISEN-GAGED FROM THE DRAIN STEM. IN SUCH A CASE,
PULL DOWN ON BOTH THE kNOB AND THE STEM WHILE ROTATING
CLOCkWISE TO RE-ENGAGE.
DRAINS
Manual Drain ......................................................................GRP-96-685
Automatic Mechanical Drain (Nitrile) ..................................GRP-95-973
Automatic Drain (Fluorocarbon)...........................................GRP-95-981
ACCESSORIES
Joiner set ............................................................................. GPA-96-601
T-Bracket .............................................................................. GPA-96-602
T-Bracket with Joiner set ...................................................... GPA-96-603
C-Bracket (18 Series) .......................................................... GPA-96-604
C-Bracket (28 Series) .......................................................... GPA-96-605
Differential Pressure Indicator
Nitrile ............................................................................... DP8-01-000
Fluorocarbon ................................................................... DP8-02-000