TENNEY ENVIRONMENTAL
Tenney Junior Test Chambers: Models TJR and TUJR, W942, or WF4
Page 22
3. Remove the two heater rack mounting screws and drop the rack to the bottom of the chamber.
Note: The back mounting screw is in a confined area.
4. The thermal cutoff is installed in-line with the Neutral
Line. It is wrapped with glass cloth electrical tape, Type
3M Scotch 27 (Lunaire P/N 914050). One side is
connected to the Neutral Line with a butt crimp
connector. The other side is connected to the heater
rack with a ring terminal, and is secured with an 8/32 nut.
Unwrap the tape and remove the thermal cutoff by
cutting it free of the Neutral Line at the butt connector,
and by removing the nut on the heater rack.
Replace the unit with a new thermal cutoff, along with
the proper butt splice and ring connector. Make sure you
wrap the new section properly with glass cloth electrical
tape.
As you install the new thermal cutoff and put the
plenum back together, take great care in your replacement procedure! Make sure all
connections are secure!
Heater Rack Removal #1
Heater Rack Removal #2
Screws
Thermal Cutoff Removal
Thermal Cutoff
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