STULZ CyberRow Chilled Water Series Installation, Operation & Maintenance Manual
(Dec., 2013)
Figure 17- Cartridge Filters
Screws (4)
End Cap
Rear Access
Panel
5-2
5.1.1.2 Cartridge
Filters
Disposable pleated cartridge fi lters 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 or
padded surface. Remove the four screws
holding the end cap in place. Remove the
end cap and slide the old fi lters out of
the tray as shown in Figure 17. Slide the
new fi lters into the tray and replace the
end cap. Ensure the four screws are fully
tightened.
Inspect the water level switch and ensure that the
fl oat works freely. Wipe the fl oat with a wet cloth and
detergent to remove dirt. Check that the discharge line
is open and water can pass through it freely.
5.1.6 Humidifi er
The steam cylinder has a limited lifetime and must be
replaced periodically. Because water conditions and
humidifi er usage rates vary greatly, it is diffi cult to
establish intervals for changing the cylinder. Individual
maintenance schedules must be determined for each
location, based upon periodic examination of the hu-
midifi er. A yellow LED on the humidifi er control panel
will fl ash four times in a repeating pattern when the
cylinder requires replacement.
NOTE
The yellow LED may illuminate during initial start-
up but it doesn’t necessarily mean the cylinder
needs to be replaced.
Refer to Section 5.3.2.1 and the humidifi er operator’s
manual supplied separately for detailed instructions on
changing the cylinder.
5.1.6.1 Humidifi er Drain Pump
The humidifi er drain pump (located beneath the
humidifi er) should be inspected semi-annually and
cleaned. The same maintenance procedures, as detailed
in Section 5.1.5, should be performed to properly
maintain the humidifi er drain pump.
5.1.2 EC Fans
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.
5.1.3 Coil
The coil should be inspected semi-annually and cleaned
as required, following standard coil cleaning practices.
Using a brush, clean the coil fi ns of all debris that will
inhibit airfl ow. This can also be done with compressed
air or with a commercial coil cleaner. Check for bent
or damaged coil fi ns and repair as necessary. Check all
CW lines for vibration isolation and provide supports as
necessary. Check all piping for signs of leaks.
5.1.4 Drain Pans
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 fi ns.
5.1.5 Condensate Pump
The condensate pump should be inspected semi-annual-
ly and cleaned. It will be necessary to remove the pump
as described in Section 5.3.2.4.
