Owner’s Manual
General Preventative Maintenance
By performing proper preventative maintenance your unit will operate
economically and dependably. Instructions for basic maintenance
are found below.
1. Always turn OFF electrical power supply before cleaning the unit
or performing any maintenance.
2. Although special care has been taken to minimize sharp edges,
take extra care when handling parts or reaching into units.
3. Label all wires prior to disconnecting. Wiring errors can cause
improper and dangerous operation. Verify proper operation after
service.
Preventative Maintenance
NOTE:
The following is a generalized list of maintenance procedures
that pertains to all Change’Air Classroom Units, therefore one or
more of the procedures may not apply to your particular unit(s).
Cleaning your vertical classroom unit:
Exterior
Annually or as needed, thoroughly clean cabinet exterior using a soft
absorbent cloth, mild soap and water and/or non abrasive non-acidic
cleaner.
Interior
1. Clean the interior annually or as needed.
2. Check and clean or replace air filter(s) monthly or
as
required.(Refer to Pg 5)
3. Thoroughly vacuum entire unit.
4. Wipe down metal parts as needed.
5. Clean fan assemblies. Refer to the Maintenance Section on
Fans. (Refer to Pg 6 & 7)
6. Check Heating and Cooling coils (
if equipped
) for cleanliness at
the start of each heating and cooling season (Refer to Pg 7).
7. Disinfect drain pan and drain lines
(
if equipped
)
.
8. Check electrical connections for tightness and controls for proper
operation, including if equipped the damper actuator(s) annually.
9. Oil fan motors once a year with SAE 20 non-detergent oil, if
applicable. (Refer to Pg 7)
10. Test unit and controls for complete functionality and replace
and/or adjust parts as required.
11. Check the exterior louver to be sure it is free of debris or
obstructions once a year.
5
Before beginning with any preventative
maintenance, you
MUST
follow these
safety precautions. Failure to do so may
result in personal injury or death.
W A R N I N G
Filter Maintenance
Filtering Out Trouble
Dirty air filters will cause air flow reduction through your unit. If excessive air loss occurs, the unit may freeze up when in the air conditioning
mode, or cycle on high and limit safety controls during heating mode. If this condition persists the unit may be locked out by the safety
circuits.
Each unit will be equipped with either 1” or 2” disposable pleated filters, a 1/4” washable filter, or a combination of washable and disposable
filters.
Cleaning or Changing Filters
(Recommended once a month or as required).
1. Turn
OFF
electrical supply to unit.
2. Open the upper and lower front service panels with the key
provided. Keys may vary.
3. Open the access coverl to dehumidification filters (Fig. A).
4. Slide out dirty filters and replace with new ones (Fig. A) Or wash
filters (if permanent) with water, flushing in opposite direction of
air flow, let dry and replace.
5. Reattach the access panel then close the upper and lower front
service panel and lock with key.
DANGER
Hazardous voltage.
Disconnect all power before
working on this equipment.
Failure to observe this
instruction may result in
death or serious injury.
Access Cover
Primary Filter
Outdoor Air Filter
CAUTION:
Never operate unit without a filter in place. Doing so may damage
internal components and/or cause a loss of efficiency.
Fig. A
Disposable Filter(s)
