Cartridge Filters; Ec Fans; Coil; Drain Pans - Black Box CRCW-12 User Manual

Cold row chilled water (cw)

Table of Contents

Chapter 5: Maintenance

5.1.1.2 Cartridge Filters

Replaceable cartridge filters are held in place by an end cap in the bottom of the rear access panel. Lay the access panel down on

a piece of cardboard and remove the four screws holding the end cap in place. Remove the end cap and slide the old filters out

of the tray as shown in Figure 5-2. Slide the new filters into the tray and replace the end cap. Ensure the four screws are fully

tightened.

Rear access panel

(4) screws

End cap

Figure 5-2. Cartridge filters.

Periodic checks of the EC fans should include checking the wiring, fan motor mounts, housing, and impeller wheel. Ensure all

electrical connections are tight. Check that all mounting fasteners are secure and the impeller wheel is tightly mounted. The

impeller blades must be kept free of debris.

The coil should be inspected semi-annually and cleaned as required, following standard coil cleaning practices. Using a brush,

clean the coil fins of all debris that will inhibit airflow. This can also be done with compressed air or with a commercial coil

cleaner. Check for bent or damaged coil fins and repair as necessary. Check all capillaries for vibration isolation and support as

necessary. Check all piping for signs of leaks.

To ensure proper drainage, inspect the drain pans regularly. Make sure the drain pan outlets are always free of debris so they

empty readily and ensure the drain pans do not leak.

WARNING

Do not use chloride-based water-conditioning additives in the condensate drain pans. This will cause corrosion to

occur on the coil fins.

The condensate pump should be inspected semi-annually and cleaned. Remove the pump as described in Section 5.3.2.2. Inspect

the water-level switch and ensure that the float works freely. Wipe the float with a wet cloth and detergent to remove dirt. Check

that the discharge line is open and water can pass through it freely.

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