THERMOJET
®
G-3700E SERIES
OIL PURIFIER SYSTEM
INSTALLATION AND OPERATING MANUAL
Doc #
77740151
Rev
03
Date
June 2020
Page
69
of
111
Temperature indicated on the heater controller display will begin to decrease. As the oil
temperature falls below oil heater controller setting, the heater controller will sense the
decreasing oil temperature and attempt to energize the heater. However the high limit controller
will prohibit the oil heater from energizing and oil temperature will continue to fall. The Heater ON
pilot light will be illuminated because the heater controller is providing an ON signal to the heater
power control relay. For additional information refer to the wiring diagram included in the section
of this manual titled
IX PARTS LIST / DRAWINGS / SCHEMATICS
.
Press the High Temperature Cut-Out reset button and observe the oil temperature indication on
the heater temperature controller. The oil heater will resume operation and the oil temperature will
increase to the normal set point.
Shut down the ThermoJet as described above. Disconnect the thermocouple simulator from the
terminals and re-connect the high limit thermocouple. Take care to observe proper connections
for (+) and (-) terminations. Securely re-install the enclosure covers.
Conduct the same sequence as described above except verify the high temperature cut out
operation for the thermocouple that is clamped to the outside of oil heater vessel.
NOTICE:
When a Heater High Temperature alarm occurs the red
pilot light will illuminate. The alarm pilot light will remain
illuminated and the oil heater will not be operable until the
Heater High Temperature reset button is depressed. Press
the reset push button to resume heater operation.
Once the oil
temperature falls below
the normal control set
point the Oil Heater ON
pilot light (AMBER)
illuminates
Press the RESET
button and observe the
oil temperature
