Replacing the Heater

Process Heater

1Disconnect and lockout the main power.

2 Gain access to the process heater by

removing the left dryer side panel.

3Open the electrical enclosure door.

Central

When configured as a central dryer, there is no process heater in the sys- tem. Therefore, replac- ing the process heater is not applicable.

For D15, D25, and D50 Dryers

4Remove the hose and hose clamp at the bottom of the heater tube.

5Remove the insulation from the heater tube by cutting the insulation in a straight line from top to bottom.

6Reference the wiring diagram and / or trace the wires from the process heater tube into the control box. Remove the wires from the relays and ter- minal strips. Once disconnected, pull the wires from the control box into the dryer housing toward the heater tube.

7Remove the heater tube by twisting the tube counterclockwise. The tube is threaded into the lower bed plate. You may need to use a pipe wrench or chain wrench to remove the heater.

8Remove the plugs or hose fittings toward the top end of the heater. These will need to be installed on the new heater.

9Check the ID mark on the side of the heater tube for kW rating and volt- age. The ID mark is on the outside of the tube near the end with the lead wires. Make sure the kW and voltage is the same as the replacement heater.

10Reinstall the plugs or hose fittings into the 1/8" (3.18 mm) NPT holes near the top end of the heater tube.

✒TIP: Depending on the model and the mounting configuration selected for the dryer installation, it may be necessary to access the process heater through the right side panel or to remove the process blower to create adequate access to use a wrench to remove the process heater. See Removing the Process Blower.

11Thread the new heater into the lower bed plate. The lead wires should be pointing toward the inside of the dryer. Do not over tighten. Hand tight- en then use a wrench for no more than one turn to put the lead wires into the correct position.

Note: When installed, the process heater tube must be oriented so the power wires are toward the inside of the dryer.

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Conair 15, 25, 50, 100 specifications Replacing the Heater, Process Heater
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50, 15, 100, 25 specifications

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