9.3.4 Auto roll filters
-
Detailed maintenance instructions are in the auto roll filter section!
-
These filters work automatically and can be monitored by the controlling device. A warn-
ing indicates the filter strip is finished. The filter roll must be replaced.
-
Every six months the oil level is to check. Lubricate roller chain and gears. Use for the
gears and chain wheels oil, according to the manufacturer instructions.
9.4 Heat exchangers
-
For prolonged standstill, we recommend the complete emptying of the heat exchanger.
-
At each refill the heat exchanger must be vented properly.
9.4.1 Medium water / steam
Heat exchangers special maintenance is not required, only occasional cleaning is recom-
mended. Depending on the hours of operation and filter maintenance approximately every
three months, the heat exchanger fins shall be check for dust contamination, debris and
cleaned if necessary. The piping is to check for leaks.
Cleaning
Cleaning is carried out in the mounted state with a strong vacuum cleaner from the dust air-
side. For strongly adhering dust the heat exchanger can be dismounted and cleaned with
water. Galvanized steel coils can be cleaned with steam cleaner or by washing the fins with a
strong water jet. You may take a soft brush to help, but not damage the fins.
The fins of copper-aluminium heat exchangers are particularly sensitive, there-
fore, use water with low-pressure for cleaning. Damaging the fins by mechani-
cal force leads to premature deterioration of the heat exchanger.
Corrosion spots must be cleaned and protected with zinc dust paint.
Antifreeze protection
Check antifreeze activity before each winter season. Check frost protection thermostat for
correct setting.
Drain pan
Drain pan and drain should be checked for debris and cleaned, if necessary
Figure 140:
Cleaning of air coolers
clean here
