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Caution:
1. Excessive foaming indicates the presence of
refrigeration in the oil and will result in insufficient
compressor lubrication. Turn off the motor and
investigate the cause.
2. An excess of oil in the compressor can cause
problems in the same way as a lack of oil. Before
topping up, contact a qualified service technician.
Use only Trane recommended oil.
3. The flow of refrigerant through the sight glass should
be smooth and without bubbles. Bubbles indicate a
refrigerant shortage and probably a leak, or a restriction
in the liquid line. Contacta qualified service technician.
Each sight glass is equipped with a moisture indicator.
The colour of the indicator element changes with the
amount of moisture in the refrigerant, but also as a
function of temperature. It should
refrigerant if it indicates <<wet>> run the unit for a
minimum of 12 hours and check again. If it remains
consistently in <<caution>> or <<wet>> zones, contact
a qualified service technician.
4. Run the compressor(s) for a minimum of two (2) hours
before taking the initial moisture level readings after a
start-up. The moisture indicator element is moisture
and temperature sensitive, so the system must be at
normal operating temperatures to obtain correct
moisture level readings.
3. Observe operating pressures. If pressures are above or
below normal, see <<Trouble Analysis>> section. Normal
operating pressures are in Table 2.
4. Inspect entire system for any unusual conditions such as
noisy compressor, loose access panels, leaky pipes of
chattering contactors.
5. Note temperatures, pressures, date and time as well as
any observation in a machine log book.
Annual maintenance
1.Remove corrosion from any surface and repaint. Check
the condition of the gasket around the control panel door.
2.Perfor m all weekly maintenance procedures.
Table 2A
General interconnecting line sizes.
0-20
CONDENSING
UNIT
LIQ
SUCT
5
RAUP 400
/
1
8
RAUP 250,500
7
/
1
8
RAUP 300,600
7
/
1
8
** In shaded region, use 2 1/8 for all horizontal runs, and 1 5/8 for all vertical risers.
However, for correct and proper pipe sizing, it is
recommended to size piping based on Trane
recommended piping guide or use computer aided
software where applicable
Maintenance
indicate <<dry>>
LENGTH OF INTERCONNECTING LINES(FT)**
21-40
41-60
61-80
LINE SIZE - O.D.(IN.)
LIQ
SUCT
LIQ
SUCT
LIQ
SUCT
LIQ
5
7
5
7
5
7
1
7
/
/
1
/
/
1
/
/
2
/
8
8
8
8
8
8
8
5
7
5
7
1
7
1
7
/
/
1
/
/
2
/
/
2
/
8
8
8
8
8
8
8
5
7
5
7
1
7
1
/
/
2
/
/
2
/
/
2
/
1
8
8
8
8
8
8
8
13
Maintenance inspections
If the unit does not perform properly during these
inspections, consult the <<Trouble Analysis>> section for
possible cause and recommended procedures. The
following procedures should be carried out by a qualified
service technician as part of a maintenance contract.
The first and last visit will include the seasonal shut down
and start-up procedures, when applicable as detailed on
the section on <<operation>>. The visits should include
the following procedures :
- Inspect contacts of motor contactors.
- Check setting and function of each system control.
- Perform an oil analysis to determine the acidity of the
compressor oil and record the results.
Warning / Caution :
The oil analysis procedure must be performed by a
qualified service technician. Incorrect interpretation
of analysis results can cause damage to the unit.
The use of improper analysis procedures can cause
hazardous condition that may result in injury to service
personnel.
- Refrigerant leak test.
- Check motor winding insulation (once per year).
Other procedures may be necessary, depending on the
age and usage of the equipment.
Note :
It is important that the equipment is regularly serviced
by a qualified service technician, at least once per
year /1000 hours of operation , minimum frequency.
Failure to respect this requirement may result in
cancellation of Trane warranty and liability.
A maintenance visit by a qualified service technician is
also recommended after the first 500 hours of operation
after commissioning.
81-100
101-120
121-140
41-160
SUCT
LIQ
SUCT
LIQ
SUCT
LIQ
SUCT
1
7
1
7
1
7
/
2
/
/
2
/
/
2
/
/
2
8
8
8
8
8
8
8
1
1
1
1
1
1
/
2
/
1
/
2
/
1
/
2
/
1
/
2
8
8
8
8
8
8
8
1
1
1
1
1
1
/
2
/
1
/
2
/
1
/
2
/
8
8
8
8
8
8
161- 180 181-200
LIQ
SUCT
LIQ
SUCT
1
7
1
7
1
/
/
2
/
/
2
/
8
8
8
8
8
1
1
1
/
1
/
2
/
8
8
8
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