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Eubank 7AA1024H-1060H & 7AA2024H-2060H I&O Manual 03/2021 Rev.1
The dual function thermal cut-out switch (P/N 70006) is composed of two independent line voltage
snap-disc temperature switches mounted in a single enclosure. One of these switches is an automatic reset
device which cycles off at approximately 145°F and back on at approximately 115°F. Should this switch
fail to open, the second switch will open the circuit if the temperature continues to increase. This second
switch does not reset. If it opens (breaks the line voltage circuit to the heater assembly) the switch will
have to be replaced by qualified service personnel after the source of the overheat problem is resolved.
In addition to the thermal cut-out switch described above, there is a single function thermal cut-out
switch (P/N 70005) mounted on the heater frame. This switch controls the 24V AC control current to the
heater contactor(s) which powers all the heating elements. This single function thermal cut-out switch
operates totally independent of the dual thermal cut-out switch described above. If the single function
switch senses an overheat situation, it opens the control circuit and turns off all of the installed heating
elements via the heater contactor(s). Because this switch controls the heater contactor(s), only one switch
is required to disconnect power from the contactor(s), regardless of the number of heater elements. This
single function switch is also non-resettable, and must be replaced by qualified service personnel after
the source of the overheat problem is resolved. This switch would typically open if both elements of the
dual thermal cut-out switches failed.
