Appendix l C-1
Cleaning the Precooler Coils
The optional 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 screws securing the precooler in the precooler housing.
✒
TIP: If the aftercooler (without a flow control) was installed using the recommended
24 inch {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.
✐
(continued)
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