Frick TDSL 193L User Manual

070.250-IOM1 (NOV 2013)
Page 19
TDS_ Rotary Screw Compressor
Maintenance
Maintenance
General information
This section provides instructions for normal maintenance,
a recommended maintenance program, and troubleshoot-
ing and correction guides.
WARNING
This section must be read and understood before at-
tempting to perform any maintenance or service to
the unit.
CAUTION
Cylinder assembly under high spring load. Consult
manual before disassembly. Improper disassembly may
cause injury due to spring tension release.
WARNING
Compressor surfaces, especially those on the discharge
housing, may become hot during operation. Addition-
ally, surfaces near the suction ange may be cold.
Contact with compressor surfaces during or soon after
operation may cause burns. If it is likely that anyone
may touch the compressor during operation and the
conditions are such that burns may occur, the pack-
ager must implement protection measures. For com-
pressors that must comply with the Machinery Directive,
refer to the requirements of EN ISO 13732-1.
WARNING
Opening any part of the compressor unit to atmosphere
while under pressure may cause injury. Ensure that the
compressor pressure is at 0 psig before removing any
pressure containing part.
Normal maintenance operations
When performing maintenance you must take several
precautions to ensure your safety:
WARNING
1. If unit is running, press [stop] key.
2. Disconnect power from unit before performing any
maintenance.
3. Wear proper safety equipment when compressor unit
is opened to atmosphere.
4. Ensure adequate ventilation.
5. Take necessary safety precautions required for the
refrigerant being used.
General maintenance
Proper maintenance is important in order to ensure long
and trouble-free service from your screw compressor. Some
areas critical to good compressor operation are:
1. Keep oil clean and dry, avoid moisture contamina-
tion. After servicing any portion of the refrigeration
system, evacuate to remove moisture before returning to
service. Water vapor condensing in the compressor while
running or more likely while shut down, can cause rusting
of critical components and reduce life.
2. Keep suction strainer clean. Check periodically,
particularly on new systems where welding slag or pipe
scalecouldnditswaytothecompressorsuction.Exces-
sive dirt in the suction strainer could cause it to collapse,
dumping particles into the compressor.
3. Keep oil lters clean.Ifltersshowincreasingpressure
drop, indicating dirt or water, stop the compressor and
changelters.Runningacompressorforlongperiodswith
highlterpressuredropcanstarvethecompressorofoil
andleadtoprematurebearingfailure.Dualoilltersare
recommendedsothatthelterscanbechangedwithout
shutting down the package.
4. Avoid slugging the compressor with liquids (oil).
While screw compressors are probably the most tolerant
of any compressor type available today about ingestion
of some liquid, they are not liquid pumps. Make certain a
properly sized suction accumulator is used to avoid dump-
ing liquid into compressor suction.
5. Protect the compressor during long periods of shut-
down. If the compressor will be sitting for long periods
without running, it is advisable to evacuate to low pres-
sure and charge with oil (or dry nitrogen for packages).
This is particularly true on systems known to contain
water vapor.
6. Preventive maintenance inspection is recommended
any time a compressor exhibits a noticeable change in
vibration level, noise, or performance.
Changing oil
WARNING
DO NOT MIX OILS of different brands, manufacturers,
or types. Mixing of oils may cause excessive oil foam-
ing, nuisance oil level cutouts, oil pressure loss, gas or
oil leakage and catastrophic compressor failure.
Shut down the unit when changing oil. At the same time,
you must change all oilltercartridgesandremoveand
clean all oil strainer elements. The procedure is as follows:
1. Stop the compressor unit.
2. Lock out the motor starter.
3. Close the suction and discharge service valves
4. Using appropriate equipment, lower the compressor
pressure to 0 psig.
5. Open the drain valves and drain oil into a suitable
container.
6. Draintheoilltersandtheoilcoolers.
7. Removetheoldltercartridges,andinstallnewones.
8. Remove, clean, and reinstall elements in the strainers.
9. Evacuate the unit.
10. Open the suction service valve and pressurize the unit
to system suction pressure. Close the suction valve
and leak test.
11. Add oil.
12. Open the suction and discharge service valves
13. Remove the lockout from the motor starter.
14. Start the unit
Note: Allow time for oil to cool before opening the drain
plugs.

Frick TDSL 193L Specifications

General

Brand	Frick
Model	TDSL 193L
Category	Air Compressor
Language	English