CyberOne EC CW IOM Manual
15
4.0
MAINTENANCE
4.1
Periodic General Maintenance
Systematic, periodic general maintenance of the CyberOne
EC CW unit is required for optimal system performance.
General maintenance should include, but not be limited to,
the following: Replacing filters and humidifier cylinders,
tightening electrical connections, checking the condensate
drain line to ensure it is free of debris, cleaning the interior of
the unit, visually inspecting the unit’s components.
Use copies of the Periodic General Maintenance Checklist
located in the back of this manual to record periodic
general maintenance inspections. For assistance, contact
STULZ Product Support. Follow all safety statements while
performing any type of maintenance.
WARNINGS
This equipment should be serviced and repaired by
a journeyman refrigeration technician only.
This unit employs high voltage equipment with
rotating components. Exercise extreme care to
avoid accidents and ensure proper operation.
Hazardous voltage will still be present inside the
electric box at the motor start protectors and
circuit breakers, even with the unit turned off at
the microprocessor controller. To isolate the unit
for maintenance, turn off power at the main power
disconnect switch. Always disconnect main power
prior to performing any service or repairs.
Turn off power to the unit unless you are performing
tests that require power. With power and controls
energized, the unit could begin operating
automatically at any time. To prevent personal
injury, stay clear of rotating components as
automatic controls may start them unexpectedly.
4.2
Maintenance Procedures
4.2.1
Air Filter
The air filter is usually the most neglected item in an air
conditioning system. To maintain efficient operation, the filter
should be checked at least monthly and replaced as
required.
NOTE
Air quality in conditioned spaces varies. A schedule
for checking air filters should be based on those
conditions.
4.2.2
EC Fan
Periodically check the EC fan system wiring, motor mounts,
housing and impeller wheel. Ensure all electrical connections
are tight. Verify all mounts are secure and the impeller wheel is
tightly mounted. Impeller blades should be kept free of debris.
4.2.3
Drain Pan
Inspect the drain pan on a monthly basis to ensure proper
drainage. Ensure the drain pan outlet is always free of debris
and the drain pan does not leak.
4.2.4
Coils
Coil(s) 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 lines and capillaries
for vibration isolation and support as necessary. Check all
piping for signs of leaks.
4.2.5
Heat/Reheat
The heat/reheat equipment should be inspected semi-
annually to ensure it is operational. If you have electric heat/
reheat, inspect the heating elements to ensure they are free
of debris.
4.2.6
Humidifier
The 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 will flash 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 4.4.2 Humidifier Cylinder Replacement and the
humidifier operator’s manual supplied in the unit data
package for detailed instructions on changing the cylinder.
