Stulz CeilAir CW - Coils; Condensate Pump; Drain Pan; Humidifier

70 OCH0006F08/13/2024
CEILAIR
®
CW & DX IOM
4.1.1.5 COILS
mounts, housing bolts, and blower wheel set screw. Ensure all electrical connections are tight. Check that all
mounts are secure, and that the blower wheel is tightly mounted on the shaft without rubbing against the fan
housing. The blower vanes should be kept free of debris. Inspect motor pulleys and sheaves for excessive
grooves. Inspect bearings for excessive wear. Inspect the blower section for any loose parts or debris.
4.1.1.5 Coils
The coils should be cleaned as required following standard coil cleaning practices. Using a brush, clean fluid
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 refrigerant lines and
capillaries for vibration isolation and support if necessary. Check all piping for signs of leaks.
Inspect electric heating elements to ensure they are free of debris.
4.1.1.6 Drain Pan
To assure proper drainage, inspect the drain pan regularly. Make sure the drain pan outlet is always free of
debris and ensure the drain pan does not leak. Check the drain pan float switch to verify it is free to move.
4.1.1.7 Condensate Pump
The optional condensate pump should be inspected semi-annually and cleaned. Ensure that the float works
freely. Wipe the float with a wet cloth and detergent to remove dirt. Clean the tank bottom. Check that the
discharge line is open, and water can pass through it freely.
4.1.1.8 Humidifier
The optional humidifier’s steam cylinder has a limited lifetime and must be replaced periodically. Because
water conditions and humidifier usage rates vary greatly, it is difficult to establish intervals for changing the
cylinder.
Individual maintenance schedules must be determined for each location based upon periodic examination of
the humidifier. A yellow LED on the humidifier cabinet repeatedly flashes four times to indicate the cylinder
should be replaced.
NOTE Yellow LED on Start-up
The yellow LED may illuminate during initial start-up, but it does not necessarily mean the cylinder needs
to be replaced.
Refer to the humidifier operator’s manual for detailed instructions for changing the cylinder.
Also, perform the maintenance operations described in the humidifier manual.
4.1.2 Condenser/Condensing Unit
Maintenance access to the condensing unit is through one or two removable panels (depending on model).
Clean the air-cooled condenser coil of all debris that will inhibit airflow. This can be done with compressed air
or with a commercial coil cleaner. Check for bent or damaged coil fins and repair as necessary. On outdoor