SS-SVX002B-EN
39
Maintenance
Periodic General Maintenance
Systematic, periodic general maintenance of the CyberAir
system is recommended for optimum performance.
General maintenance should include, but is not 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, inspecting the units’ components visually,
checking level of refrigerant and ensuring no moisture is in
the refrigerant.
Use copies of the Periodic General Maintenance Checklist
in this manual (see
) to record periodic
general maintenance inspections. For assistance, contact
product support. Ensure adherence to all safety
statements while performing any type of maintenance.
WARNING
Hazardous Service Procedures!
Failure to follow all precautions in this manual and on
the tags, stickers, and labels could result in death or
serious injury.
Technicians, in order to protect themselves from
potential electrical, mechanical, and chemical hazards,
MUST follow precautions in this manual and on the
tags, stickers, and labels, as well as the following
instructions: Unless specified otherwise, disconnect all
electrical power including remote disconnect and
discharge all energy storing devices such as capacitors
before servicing. Follow proper lockout/tagout
procedures to ensure the power can not be
inadvertently energized.When necessary to work with
live electrical components, have a qualified licensed
electrician or other individual who has been trained in
handling live electrical components perform these
tasks.
Hazardous voltage will still be present inside the electric
box at the motor start protectors and at the heater and
humidifier 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.
Precision A/C Unit
Check the refrigerant sight glass on a monthly basis while
the unit is running and ensure it is free of bubbles. Bubbles
in the sight glass indicate a low refrigerant charge or a
clogged filter-drier. Check for humidity in the refrigerant by
viewing the color of the indicator in the center of the sight
glass and comparing it to the color scale on the outer ring.
If humidity is present, the system must be evacuated and
recharged.
Check the superheat and sub-cooling temperatures semi-
annually and ensure they are within the range shown in
the refrigerant pressure/temperature table in Section
2.9.6. If necessary, adjust the refrigerant charge to achieve
the correct values. If the refrigerant level is low, check the
system for leaks.
Air Filter
The air filter is usually the most neglected item in an air
conditioning system. To maintain efficient operation, the
filter should initially be checked at least monthly and
replaced as required.
Note:
Conditions of spaces vary and the frequency of
checking air filters should be based on those
conditions.
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
mounts are secure and the impeller wheel is tightly
mounted. The impeller blades should be kept free of
debris.
Drain Pan
To ensure proper drainage, inspect the drain pan regularly.
Make sure the drain pan outlets are always free of debris
and ensure the drain pan does not leak.
Coils
The coil(s) should be inspected semiannually 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 refrigerant lines and capillaries for
vibration isolation and support as necessary. Check all
piping for signs of leaks.
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.
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.
