Replacing the Heaters
Process Heater Tube (continued)
7 Loosen the hose clamp securing
the heater tube in place and
remove the tube from the unit.
8 Slide the insulation off, or make a
straight cut in the insulation and
remove it from the defective heater
tube.
9 Check the ID mark on the side of
the heater tube for the kW rating
and voltage and replace with a
new heater tube with the same
ratings. The ID mark is on the
outside of the tube near the end
with the lead wires.
10 Place the insulation on the new heater tube. Make sure to duct tape the
seam that was cut during removal, if necessary.
11 Secure the new heater to the support tab with a hose clamp. Be sure
the end of the heater tube with the cables is oriented toward the bottom.
12 Connect the hoses to the top and bottom of the heater tube, and secure
with hose clamps. Be sure that the insulation of the top hose is in place and
in good condition.
13 Connect the heater tube cables to the quick disconnects of the control
box wiring harness.
14 Replace the metal control cabinet and plastic rear covers.
14 Make sure the process heater fuses are not blown before applying
power to the new heater.
15 Connect the power and start the dryer.
Troublesho oti ng l 6-33
Insulation
Clamp
6
Troubleshooting
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