IMPORTANT: The distance the RTD extends into the heater is critical for proper functioning. The distance from the metal heater tube to the outside surface of the curve on the RTD must be 2.5" (63.5 mm) (see photo). To take the measurement, peel back (but do not remove) any existing insulation to access the metal heater tube.

Replacing the Heaters

Regeneration Heater ( c o n t i n u e d )

12Put petroleum jelly on the tips of the new heater wire leads to make it eas- ier to go through the holes in the back of the control box. Reference the wiring diagram to re-attach the heater wires and the two snap switch wires.

13Install the RTD fitting and RTD in the 1/8" (3.18 mm) NPT hole toward the top of the heater tube.

2.5"

(63.5mm)

14Put the insulation back on. Make sure to duct tape the seam that was cut during removal.

15Put the hose barb back in the lower 1/8" (3.18 mm) NPT hole and connect the plastic hose.

16Reattach the lower 2-1/2" (63.5 mm) hose and hose clamp.

17Make sure the heater fuses are not blown before trying the new heater.

6 - 2 2 l Tr o u b l e s h o o t i n g

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Conair 25, 15, 50, 100 specifications 63.5mm
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50, 15, 100, 25 specifications

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