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WARNING:
DISCONNECT ELECTRICAL PO WER
SOURCE AND SECURE IN DISCONNECTED POSITION
BEFORE SERVICING THE UNIT. FAILURE TO DO SO MAY
RESULT IN PERSONAL INJURY OR DEATH FROM
ELECTRICAL SHOCK.
Monthly Inspection
1. Check condition of air filters and replace them if necessary.
2. Check the drain pan to be sure that it is clean and free to
carry the flow of condensate through the drain line.
3. Check the coil surface for cleanliness. Clean if necessary.
Yearly Inspection
1. Replace filters.
2. Check coil surface. Clean by vaccuming or flushing with
cold water. Do not use steam or hot water. High pressure
may damage coil.
3. Carry out checks as detailed in inspection checklist in the
Operation Section.
4. Inspect the condition of the evaporator fan belt and replace
if necessary. The belts fitted to TTV units cannot achieve
design performance without the correct tensioning.
5. Check condition of vibration isolators, replace if there is any
sign of wear, loosening or material deterioration.
6. Check fan bearings for noisy operation and excessive
lubricant leakage. Replace if necessary.
7. Inspect the condensate drain pan and condensate piping
to make sure they are clear and will carry away all water.
8. Inspect the control panel wiring to make sure connections
are tight and insulation is intact.
Maintenance
Change / Clean Filters
Change or clean air filters at least twice a year. Filters will
require more frequent care under high load conditions or dirty
air. A clogged air filters reduces airflow, cooling capacity and
increases energy usage.
To clean permanent filters, remove the filter media and wash it
in water to remove dust, dirt and lint; allow to dry thoroughly
before re-installing in the units. Do not rub or wring.
Permanent filters can also be cleaned by blowing with
compressed air in opposite direction of filter airflow.
Belt Maintenance
Clean fan belts and pullies with a dry cloth. Oil and grease
must be kept off belts. The use of a belt dressing is not
recommended. When replacing belts, use a matched set.
Do not force belts onto pullies, but adjust motor position to
allow mounting and then re-tighten.
Figure 3 : Belt Tension Measurement
To measure belt tension, use a belt tensioner as shown in
Figure 3. Determine actual deflection by depressing one belt
with the belt tensioner and then adjust the belt tension to the
correct pounds force and tighten all setscrews to the proper
torques.
9
Force
Deflection
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