10.0 MAINTENANCE
•Remove 6 screws from top panel above cooler and remove panel.
•Using lifting device from above, attach lifting straps to lifting supports on each side of cooler.
•With the weight of the cooler supported by the lifting device, remove the 10 screws securing the cooler and remove the cooler.
•Clean coolers with a mild cleaning solution.
warning
Strong cleaners can harm aluminium cooler parts. Follow cleaner manufacturers instructions for use. Wear appropriate safety equipment.
•After cleaning is complete, reassemble in reverse order.
N250/300H−TWO STAGE
COOLANT COOLERS
•Following are instructions for removal and internal cleaning of coolant coolers.
•Remove panels and top cover.
•Drain the coolant. See Section 4.6.
•Remove side panels from coolant cooler box.
•Disconnect piping from coolant cooler inlet and outlet ports.
•Plug cooler inlet and outlet ports to prevent possible contamination.
•Remove coolant cooler holding screws from sides of coolant cooler and remove cooler through side of cooler shroud.
•It is recommended the cooler be taken to a
professional cooler service shop for flushing with an appropriate environmentally safe cleaning agent.
•Reassemble in reverse order.
•Make sure fan guards are replaced.
•Refill the compressor with coolant. If con tamination is suspected, replace with new coolant.
•Replace fill plug.
•Run compressor for ten minutes. Check for possible leaks. Check coolant level.
•Replace enclosure panels.
warning
Strong cleaners can harm aluminum cooler parts. Follow cleaner manufacturer‘s instructions for use. Wear appropriate safety equipment.
AFTERCOOLER
•Following are instructions for the removal and internal cleaning of aftercoolers.
•Disconnect hose from aftercooler inlet flange.
•Disconnect tube from aftercooler outlet flange.
•Remove aftercooler holding screws from aftercooler support and remove cooler.
•It is recommended the cooler be taken to a
professional cooler service shop for flushing with an appropriate environmentally safe cleaning agent.
•Reassemble in reverse order.
•Replace enclosure panels.
Watercooled Cooler Cleaning
A periodic inspection and maintenance program should be implemented for watercooled heat exchangers. The following steps should be taken:
•Inspect filters in system and replace or clean as required.
•Carefully examine cooler tubes for scale and clean if necessary. If a cleaning solution is used, be sure to wash out all chemicals thoroughly with clean water before returning the compressor to service. After cleaning, examine the cooler for erosion or corrosion.
•The internal cooler tubes can be cleaned by several methods. Flushing a high velocity stream of water through the tubes will remove many forms of deposits. More severe deposits may require running wire brushes or rods through the tubes. Also, rubber plugs can be forced through the tubes if a special air or water gun is available for this procedure.
•A qualified cleaning service should be used for the cleaning process. These organizations can evaluate the type of deposit to be removed and supply the appropriate solution and method for a complete cleaning job.
•When reinstalling bonnets to cooler shell, tighten bolts uniformly in a cross−pattern. Overtightening can result in cracking of the bonnet.
•Cleaning solutions must be compatible with the metallurgy of the cooler
•Care must be taken to avoid damaging tubes if mechanical cleaning procedures are used.
Airend bearings
Airend bearings are lubricated by the compressor coolant and require no maintenance.
High Airend Temperature Sensor checking procedure
It is recommended that the discharge temperature sensor (2ATT) is checked regularly as follows:
Aircooled machines
Stop the cooling blower by opening the blower / fan mo- tor circuit breaker.
88IRN37 - 160K - CC & IRN50 - 200H
http://air.irco.com