THERMOJET
®
H-2500E SERIES
OIL PURIFIER SYSTEM
INSTALLATION AND OPERATING MANUAL
Doc #
77740119
Rev
15
Date
June 2020
Page
67
of
100
Adjust the thermocouple simulator output so that the signal replicates an increasing temperature T <
135°C (275°F) to T > 135°C (275°F). The high temperature cutout will disable the oil heater and give a
local annunciation as the temperature increases above 135°C ±2°C (275°F ±4°F). Oil temperature will
decrease.
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
.
NOTICE:
The Heater High Temperature alarm is set to disable the oil
heater as temperature increases above 135°C ±2°C (275°F
±4°F). High temperature cutout set point is non-adjustable.
Oil temperature begins
to decrease once the
temperature exceeds
the cutout set point
High temperature pilot
light (RED) illuminates
once the temperature
exceeds the cutout set
point
High Limit Thermocouple
enclosure.
