THERMOJET
®
H-2000E SERIES
OIL PURIFIER SYSTEM
INSTALLATION AND OPERATING MANUAL
Doc #
77740121
Rev
15
Date
June 2020
Page
63
of
102
Verify Low Oil Pressure Switch Operation
The ThermoJet Oil Purifier must be running and operating normally in order to perform this
maintenance task. Verifying the operation of the low oil pressure switch is to insure that the oil
heater turns OFF and is disabled when the oil pressure drops below 135 PSI (9.3 BAR).
The low oil pressure switch is mounted on the right side of the electrical control enclosure. It is
wired in series with the oil heater control circuit so that the oil heater is inoperable if the oil
pressure drops below 135 PSI (9.3 BAR). For additional information refer to the wiring diagram
included in the section of this manual titled
IX PARTS LIST / DRAWINGS / SCHEMATICS.
While the ThermoJet is operating normally, open the top cover of the ThermoJet cabinet to
access the inlet pressure control valve located on the outlet of the heater vessel. While observing
the Filter Outlet Pressure gauge, loosen the lock nut and adjust the control valve by turning the
adjusting screw CC-Clockwise to decrease the oil pressure. Decrease the pressure to a value
that is less than the low oil pressure set point of 9.3 BAR ± 0.3 BAR (135 PSI ± 5 PSI).
NOTICE:
Wear appropriate personal protective gear.
Surfaces are HOT
WARNING
Low oil pressure switch
