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Installation and Maintenance 53
6WDUW8S
CAUTION
Inadequate lubrication of fan
motor or bearings may result in
premature bearing or motor fail-
ure.
1 Inspect electrical connections. They should be
clean and secure. Compare actual wiring with
specific diagrams provided on the unit.
2 Check piping and valves for leaks. Open or close
the valves to check for proper operation. Drain
lines should be open.
CAUTION
The use of untreated or improperly
treated water in unit coils may
cause scaling, erosion, corrosion,
algae, slime or other equipment
damage. Consult a qualified water
treatment specialist to determine if
water treatment is required. The
Trane Company assumes no
responsibility for equipment dam-
age caused by untreated or
improperly treated water.
3 If equipped with a refrigerant coil, charge and
leak-test the unit to and ready it for operation
according to instructions provided with the
condenser equipment. Adjust superheat setting.
4 Check that all air filters are in place and
positioned properly. Under Periodic Maintenance,
see section titled “Air Filters.”
NOTE: UL-LISTED UNITS REQUIRE A “TOOL-ONLY”
REMOVABLE LATCH ON ACCESS DOORS. THE
HANDLE TIE-DOWN SCREW SHIPPED WITH THE UNIT
MEETS THIS REQUIREMENT, AND SHOULD REMAIN
IN PLACE WHEN THE ACCESS DOOR IS CLOSED.
5 Close and secure all unit access doors. Check
that the latch set screws are tight.
6 Remove all foreign material from the drain pan
and check drain pan opening and condensate line
for obstructions.
7 Check unit for debris.
8 Reference CLCH-IOP-1 for more details on the
start-up of units with factory mounted controls.
Start-Up Procedures
After completing all prestart-up checks and
procedures, the unit may be started. The following
checks and adjustments should be made during
initial start-up:
WARNING
Disconnect electrical power prior
to access into a fan or ductwork.
Even when locked out electrically,
fans may cause injury or damage if
the impeller is subject to “wind-
milling.” The impeller should be
secured to physically restrict rota-
tional movement. Failure to secure
impeller can cause severe per-
sonal injury or death.
Disconnect electrical power
source when connecting or dis-
connecting electrical wires for test
procedures. Do not open service
access doors while the unit is
operating. Failure to exercise cau-
tion when completing test proce-
dures or while inspecting unit
operation may result in injury or
death from electrical shock, air
movement or rotating parts.
If the unit was stored for an extended period of time,
the following items should be checked before starting
the unit.
1 Inspect motor bearings for moisture and rust.
Replace bearings if necessary and repack with
new grease.
2 Check motor winding. An acceptable winding
resistance reading is from 6 meg-ohms to infinity.
If reading is less than 5 meg-ohms, winding
should be dried out in an oven or by a blower.
3 Inspect the entire motor for rust and corrosion.
4 Lubricate the motor as instructed in the section
titled “Periodic Maintenance,” or as indicated by
the maintenance tag on the motor.