070.250-IOM1 (NOV 2013)
Page 5
TDS_ Rotary Screw Compressor
Installation - Operation - Maintenance
Long term storage of equipment may lead to the deterio-
ration of components over the period of time. Synthetic
components in the compressor may deteriorate over time
eveniftheyarekeptoodedwithoil.Awarmanddry
environment is essential to minimize environmental and
corrosion damage. Long-term storage of the affected
equipment at a customer’s site may involve additional
requirements and interested parties should refer to the
Johnson Controls web site,
www.johnsoncontrols.com/frick,forspecicinstructions.
The following guidelines must be followed to maintain the
screw compressor warranty.
Preparing the compressor for storage
1. Evacuate the compressor to remove moisture.
2. Connect the evacuation lines to the three Schrader ac-
cess valves provided with the compressor. One valve is
connected to the compressor suction and the other two
valves are located at the block on the cylinder.
3. Break the vacuum with dry nitrogen and bring pressure
to 0 psig
4. Pump oil into the SM1. Use break-in oil P/N
111Q0831809 for storage purposes. The amounts of oil
needed per compressor are:
• 163 mm - 8 gal
• 193 mm - 12 gal
• 233 mm - 15 gal
• 283 mm - 25 gal
• 355 mm - 35 gal
5. After the compressor is oil charged, pressurize the com-
pressor to 15 psig with nitrogen.
Maintaining the compressor
1. Maintain the 5 psig to 15 psig nitrogen charge, but ide-
ally at 15 psig.
2. Rotate the male rotor shaft every two weeks. Mark the
shaft to ensure the rotor does not return to the original
position..
3. Store the compressor inside a dry building environment.
4. Grease the male rotor shaft to prevent rust.
5. Record all information in a compressor long-term
storage log. See Table 2.
Contact Johnson Controls-Frick Service with any ques-
tions regarding long term storage.
Description
TDS_ compressor
The Frick TDS_ rotary screw compressor utilizes mating
asymmetricalprolehelicalrotorstoprovideacontinu-
ousowofrefrigerantvaporandisdesignedforbothhigh
pressure and low pressure applica tions. The compressor
incorpor ates the following features:
1. High capacity roller bearings to carry radial loads at
both the inlet and outlet ends of the compres sor.
2. Heavy-duty, two-point or four-point angular contact
ball bearings to carry axial loads are mounted at the dis-
charge end of compressor.
3. Balance piston located in the inlet end of the compres-
sor to reduce axial loads on the axial load bearings and
increase bearing life.
4.Moveableslidevalvetoprovideinnitestepcapacity
control from 100 to 10%.
5.
Volumizervolumeratiocontroltoallowinnitelyvariable
volume ratio from 2.2 to 5.0 during compres sor operation
for all models except TDSH 283SX which is 2.2 to 4.2
.
6. A hydraulic unloader cylinder to operate the slide stop
and slide valve.
7. Bearing and casing design for 400 PSI discharge pres-
sure. This PSI rating applies only to the compressor and
doesnotreectthedesignpressureofthevarioussystem
components.
8. All bearing and control oil vented to closed thread in the
compressor instead of suction port to avoid performance
penalties from superheating suction gas.
9. Shaft seal design to maintain operating pressure on seal
well below discharge pressure, for increased seal life.
10. Oil injected into the rotors to maintain good volumet-
ricandadiabaticefciencyevenatveryhighcompression
ratios.
11. Shaft rotation clockwise facing compressor shaft, suit-
able for all types of drives.
WARNING
Compressor rotation is clockwise when facing the
compressor drive shaft. The compressor should never
be operated in reverse rotation, as bearing damage
will result.
12. Dual compressor casing design for very low airborne
noise transmission.
Compressor lubrication system
The lubrication system on a TDS_ screw compressor
performs several functions:
1. Provides lubrication to bearings and seal.
2. Provides a cushion between the rotors to minimize noise
and vibrations.
3. Helps keep the compressor cool and prevents overheating.
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