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Start-Up
Motor-Related Checks
•
Locate installation manual from the motor manufacturer for
the specific motor installed. This can be found by
contacting the motor manufacturer's representative. The
motor manufacturer's recommendations take precedence
for all matters related to the start-up and routine
maintenance of the motor.
•
For supply fan motor, check the motor lubrication for
moisture and rust.
– Remove and clean grease plugs to inspect.
– If moisture is present, consult an authorized repair shop
for bearing inspection/replacement. This may require
removal and transport of motor.
– If no moisture is present, refer to the motor
manufacturer's lubrication recommendations for
proper lubrication.
– The motor manufacturer may recommend lubricating
the motor as part of their routine start-up instructions.
•
Check motor winding. An acceptable winding resistance
reading is from 6 meg-ohms to infinity. If reading is less
than 5 mega-ohms, the winding should be dried out in an
oven or by a blower.
•
Inspect the entire motor for rust and corrosion.
•
Bump-start the unit and confirm the fan wheel rotates
properly, as indicated by the rotation arrow located on the
fan housing.
Note: For motor warranty needs, contact your local Trane
sales office.
Unit Operation
WARNING
Rotating Components!
Failure to follow all safety precautions could result in
rotating components cutting and slashing technician
which could result in death or serious injury. During
installation, testing, servicing and troubleshooting of
this product it may be necessary to work with live and
exposed rotating components. Have a qualified or
licensed service individual who has been properly
trained in handling exposed rotating components,
perform these tasks.
WARNING
Live Electrical Components!
Failure to follow all electrical safety precautions when
exposed to live electrical components could result in
death or serious injury. During installation, testing,
servicing and troubleshooting of this product, it may be
necessary to work with live electrical components.
Have a qualified licensed electrician or other individual
who has been properly trained in handling live
electrical components perform these tasks.
60
Before complete start-up, bump-start the unit and confirm the
fan wheel rotates properly, as indicated by the rotation arrow
located on the fan housing.
After initial startup:
•
Calculate the motor voltage imbalance, notifying the power
company to correct unacceptable imbalances.
•
Periodically check the fan belt tension.
Calculate Motor Voltage Imbalance
After startup, measure the motor voltage and amperage on all
phases to ensure proper operation. The readings should fall
within the range given on the motor nameplate. The maximum
allowable voltage imbalance is 2 percent.
Voltage imbalance is defined as 100 times the sum of the
deviation of the three voltages from the average, divided by
twice the average voltage. For example, if the three measured
voltages are 221, 230 and 227, the average voltage would be
226 volts. The percent of voltage imbalance is then calculated.
Voltage imbalance =
A = (226-221) + (230-226) + (227-226)
Voltage imbalance = 2.2% (not acceptable)
In the example, 2.2 percent imbalance is not acceptable and
the power company should be notified to correct it.
VFD Programming Parameters
Units shipped with an optional variable frequency drive (VFD)
are preset and run-tested at the Trane factory. If a problem with
a VFD occurs, ensure that the programmed parameters listed
in
Table 15
have been set. If trouble still persist after verifying
factory parameters are correct, call Trane Drive Technical
Support at 1-877-872-6363. Have the unit serial number from
the drive available for the technical support representative.
The technician will determine if drive can be repaired or needs
to be replaced.
Table 14. Trane TR150 switching frequency
Horsepower
Voltage
0.5 - 15
200/230
20-60
200/230
0.5 - 30
460
40 - 125
460
0.5 - 10
575
15 - 125
575
100A
-------------------------------------- -
2
AvgVoltage
where:
Max KHz
Trane Setting
16
16
12
12
16
16
12
12
12
12
8
8
CLCH-SVX009L-EN
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