Technical Reference Manual-XPM3m Revision Date: August 2014
HEATER REMOVE AND REPLACE PROCEDURES
TOP HEATER REMOVAL
1. Remove power from the oven.
2. Loosen the screw holding the thermocouple clamp(s) in place on the cell face. Using a permanent black
marker, circle the thermocouple on the heater face. (This will help relocate the thermocouple when
reassembling the cell). If the oven has the Redundant Over Temperature Option (ROSCO) there will be two
thermocouple probes. Be sure to identify each thermocouple probe and the corresponding mounting hole.
3. Carefully straighten the thermocouple wire and cover it with a piece of 1.7mm vinyl tubing
4. Remove the support angle brackets on the left and right side of the heater panel.
5. Remove the Philips head screw holding the front panel support bracket. Remove the bracket.
6. Lower the heater panel enough to gain access to the heater wires on the inside of the cell. Block the panel up
with a 10"(or 254mm) 4x4 block of wood to relieve the strain on the wires.
7. Document the wire placement on the connections on the heater panel. They will need to be replaced later in the
same positions.
IF THE HEATER FOIL TEARS, IT CANNOT BE REPAIRED AND THE HEATER PANEL ASSEMBLY MUST
BE REPLACED.
8. Remove the four wires by using a 2.5mm hex key and a 7mm open wrenche.
9. Disconnect the two wires on the thermal switch.
10. Remove the heater panel and set it aside.
To Next Page
Loading...
