Trane 190 Installation & Operation Manual page 13

RAU-SVX01F-E4
General start-up
Operating parameters statement:
- Switch on main power supply
switch.
- Start-up the unit by pushing auto
on the control module screen.
- After unit start up, leave in
operation for at least 15 minutes,
to insure pressures are stabilized.
Then check:
- voltage.
- compressors and fan-motors
currents.
- suction temperature and pressure.
- ambient air temperature.
- blowing air temperature.
- discharge pressure and
temperature.
- liquid refrigerant temperature and
pressure.
- operating parameters:
- superheat: difference between
suction temperature and dew point
temperature. Normal superheat
must be within 5°C and 10°C.
- sub-cooling: difference between
liquid temperature and bubble
point temperature. Normal sub-
cooling on standard unit with
R134a should be 5 to 10°C, and 2
to 5°C with 407c.
- difference between dew point
temperature in high pressure and
condenser air inlet temperature.
Normal value on standard unit
with R134a and all the fans
operating should be 15 to 18°C.
With 407C, it should be 20 to 23°C.
Final check:
When the unit is operating correctly:
- Check that the unit is clean and
clear of any debris, tools, etc...
- All valves are in operating
position.
- Close control and starter panel
doors and check panels fixation.
Caution
- For the warranty to apply, any
start-up carried out directly by
the customer must be recorded
in a detailed report, which must
be sent as soon as possible to the
nearest Trane office.
- Do not start-up a motor whose
insulation resistance is less than
2 meghoms.
- Phase imbalance should not be
greater than 2%.
- The voltage supplied to motors
should be within 5% of the rated
voltage on the compressor
nameplate.
- Excessive emulsion of the oil in the
compressor shows that refrigerant
is present in the oil and the result
will be that compressor is not
lubricated enough. Shut down
compressor and consult Trane
technician.
- Excess oil in compressor can
damage the compressor.
Before adding oil, consult Trane
technician. Use only Trane
products recommended.
- The compressors must operate
in a single direction of rotation. If
refrigerant high pressure remains
stable in the 30 seconds after
compressor start-up, immediately
shut down unit and check the
direction of rotation using
phasemeter.
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