Appendix l B-1
Cleaning the Precooler Coils
The precooler coils will need to be kept clean to keep the precooler working
efficiently. Cleaning frequency depends on the type and amount of material you
process.
1 Stop the dryer and lockout the main power.
2 Turn off the water flow to the water supply line. Disconnect supply and
return lines.
NOTE: If an optional flow control was added with the precooler, remove the compres-
sion fitting from the precooler inlet. Loosen the fitting on the flow control, then swing
the copper water supply tube out and away from the precooler inlet.
3 Remove the two (2) nuts securing the precooler in the housing.
✒
TIP: If the precooler (without a flow control) was installed using the recommended 24
inches {61 cm} of flexible hoses, there is no need to disconnect the hoses from the
precooler inlet and outlet.
4 Remove the precooler assembly from the precooler housing.
5 Clean the assembly using a mild soap and water. Let the assembly dry
thoroughly before installation.
6 Inspect the condition of the gasket. If it is damaged, replace the gasket.
7 Reassemble by repeating the steps in reverse order.
8 Connect the water supply line to the inlet. If a manual shut off valve is used, it
should be mounted on the inlet line as well.
9 Connect the outlet of the precooler to the inlet of the flow control valve using
the pre-shaped copper tubing and compression fittings provided.
✐
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