BLUE M
Model ESP400 Industrial Oven
Page 22
7.0 ELECTRIC HEATING SYSTEM & CONTROL
Overview:
Heating of the oven is achieved by recirculating oven air through an open-air heavy gauge nichrome wire
heater element in the conditioning plenum. The element is configured in a serpentine pattern within a
cylindrical stack and supported by ceramic disks. The heater stack is isolated from the workspace so that no
direct radiation can occur. Heater wires extend through a ceramic plate and connect to terminals in the
machinery base.
Heat Control:
The heat control circuitry is enabled through the High Limit Output of the Overtemperature Controller OTP. A
time proportioned output from the main temperature controller is used to energize a solid state relay, which
provides power to the heater.
HEATER STACK
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