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724-746-5500 | blackbox.com
724-746-5500 | blackbox.com
Page 113
Chapter 5: Maintenance
5. Maintenance
5.1 Periodic General Maintenance
Systematic, periodic general maintenance of the Cold Row unit is required for optimum system performance. General
maintenance should include, but is not limited to the following: replacing filters, tightening electrical connections, checking the
condensate pans and drain line to ensure they are 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 IF APPLICABLE.
Use copies of the Periodic General Maintenance Checklist in this manual (see Appendix A.2) to record periodic general mainte-
nance inspections. For assistance, contact Black Box Technical Support. Ensure adherence to all safety statements while perform-
ing any type of maintenance.
WARNING
This equipment should be serviced and repaired by a journeyman or a qualified refrigeration technician only.
WARNING
This unit uses 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.
WARNING
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.
5.1.1 Filters
The filter is usually the most neglected item in an air-conditioning system. To maintain efficient operation, check the filter every 3
to 6 months and clean or replace it as required.
NOTE: Conditions of spaces vary. Extremely dusty environments may require more frequent filter maintenance.
The air filters are located behind the air intake grille at the rear of the cabinet. To access the filters, unlatch the rear access panel
at the top and remove it from the cabinet.
5.1.1.1 Cleanable Filters
Cleanable filters are spring loaded in the holding trays in the access panel. Using a flat-head screwdriver, gently push the filters to
one side and remove the old filters from the trays (Figure 5-1).