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SECTION V – Routine Maintenance
Each unit on a job will have its own unique operating
environ ment and conditions which may dictate a mainte-
nance schedule that differs from other units on a job. A
formal schedule of regular maintenance and an individual
unit log should be established and maintained. This will
help to achieve the maximum performance and service life
of each unit on the job.
Information regarding safety precautions contained in the
preface at the beginning of this manual should be followed
during any service and maintenance operations.
For more detailed information concerning service
operations consult your sales representative or the factory.
Motor/Blower Assembly
The type of fan operation is determined by the control
components and their method of wiring. This may vary
from unit to unit. Refer to the wiring diagram that is
attached to each unit for that unit's individual operating
characteristics.
All motors have permanently lubricated bearings. No field
lubrication is required.
Figure 13. Motor Blower Slide Out
A. Disconnect Plugs
Modular Hi-Rise Replacement Series – MIY
INSTALLATION, OPERATION, & MAINTENANCE MANUAL
SECTION FIVE — Routine Maintenance
Should the assembly require more extensive service, it is
designed to slide-out of the unit and be removed from the
unit, if necessary, by disconnecting plugs (see A shown
in Figure 13). Remember to turn off the power to the unit
and lockout the internal circuit breaker of the unit (see B
also shown in Figure 13) prior to performing any service.
Periodic cleaning of all components exposed to the unit air
stream is recommended.
Coils
Coils may be cleaned by removing the filter and brushing
the entering airflow coil face between fins with a stiff
brush. Care should be taken to not damage coil fins.
Brushing should be followed by cleaning with a vacuum
cleaner. If a compressed air source is available, the coil
may also be cleaned by blowing air through the coil fins
from the leaving air face. This should again be followed
by vacuuming. Units provided with the proper type of air
filters, replaced regularly, will require less frequent coil
cleaning. Take care not to damage or fold coil fins, which
would cause diminished performance.
Figure 14. MIY Coil
If more extensive coil service is required, the coil can easily
be removed from the unit by removing the coil component
as shown in Figure 14.
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