Maintenance - Trane LWHA Installation Operation & Maintenance

TRANE ®
WARNING
!
WHEN INSTALLING
SERVICING THIS EQUIPMENT,
ALWAYS EXERCISE BASIC
SAFETY PRECAUTIONS TO
AVOID THE POSSIBILITY OF
ELECTRIC SHOCK THAT COULD
RESULT IN SEVERE PERSONAL
INJURY OR DEATH.
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
cleanliness. Clean if necessary.
Yearly Inspection
1.Replace filters.
2.Check coil surface, clean by
vacuuming or flushing with cold
water. Do not use steam or hot water.
3.Carry out check (g) through (j) as
detailed in inspection checklist in the
Operation Section.
4.Inspect the condition of the fan belt
and replace if necessary.
The belts fitted to units cannot achive
design performance without the
correct tensioning.
5.Check condition of external 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.
9.Check system for water leaks.

Maintenance

Change / Clean Filters
Change or clean air filters at least twice
OR
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 washable 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.
Washable filters can also be cleaned
by blowing with compressed air in
opposite direction of filter airflow.
for
Fan Belt Tension
Note: Fan belt tension should be
checked at least twice during the first
day of operation, since there is a rapid
decrease in tension until belts are run
in.
Proper belt tensioning is required to
ensure maximum bearing and drive
component life and is based on fan
brake horsepower requirement.
Belt Tension Measurement
Check the belt tension as follows:
Measure the span length mm of the
drive. With a belt tensioner at the
center of the span. apply a force K
(perpendicular to the span) large
enough to deflect the belt 15mm per 1
meter of span. Refer to figure 5.
DEFLECTION = SPAN mm X 15/1000mm
The deflection force for the belt should
be within the minimum and maximum
force shown in the Table 1. When the
tension drops to the minimum value,
15
readjust to the maximum value.
To measure belt tension, use a belt
tensioner as shown in Figure 6.
Determine actual deflection by
depressing one belt with the belt
tensioner and measuring
deflection relative to the other belts or
to belt line. Adjust the belt tension to
the correct force (Newton) and tighten
all setscrews to the proper torques.
Figure 5
Belt Tension Measurement
Fan /Motor Bearing
IMPORTANT
!
THE MOTOR & FAN FURNISHED
WITH SHIELDED BEARINGS.THE
BEARINGS ARE PRE-LUBRI-
CATED FOR LIFE AND MAIN-
TERANCE FREE. REPLACE THE
BEARING IF DAMAGED/NOISY.
the