070.655-IOM (FEB 22)
Page 24
SBTP Rotary Screw Compressor
Maintenance
The linear transmitter with hermetic enclosure is based on
the inductive measuring principle. It features removable
electronics, from the sensor well, eliminating the need to
evacuate the compressor for replacement. This type of
transmitter is dedicated to volume ratio control and has no
user adjustments.
1. Shut off control power.
2. Remove DIN connector plug from transmitter.
3. Loosen setscrews.
4. Remove transmitter unit.
5. Install new transmitter unit.
6. Tighten setscrews.
7. Apply DIN connector plug to transmitter.
8. Turn on control power.
NOTICE
For calibration of the Volumizer unit, refer to the
Ana-
log Calibration instructions
in publication
090.040-O
.
Replacing the bare compressor
The following procedure is required only when replacing a
bare compressor in the field.
1. Verify that the starter is locked out.
2. Remove all tubing, piping, and wiring that is connected
to the compressor.
3. Disconnect the coupling from the motor shaft.
4. While supporting the compressor assembly with a
crane, remove the bolts at the compressor feet.
5. Thoroughly clean the compressor feet and mounting
pads of burrs and other foreign matter to ensure firm
seating of the compressor.
6. Thoroughly clean the new compressor and remove all
cover plates and protection etc.
7. Install new gaskets and sealing in all connections.
8. Set the new compressor in place and shim feet where
required.
9. Reattach the drive coupling.
10. Check the shaft alignment and perform cold alignment.
11. Complete tubing, piping, and wiring.
12. Restart the unit, and run until steady state conditions
are met. Shut down, lock out motor starter, and per-
form a hot alignment.
Long-term storage
For long-term storage of 6 months to 5 years, provisions
are required, regardless of storage environment, if start-
up or useful operation does not occur within 6 months of
equipment shipment. Special provisions may be necessary
for storage of less than 6 months if the storage area is
subject to extreme environmental conditions such as high
humidity, large changes in temperature, or dusty atmo-
sphere.
Frick suggests making arrangements with the local
Johnson Controls-Frick service organization, arranged
through factory service, regarding surveillance and main-
tenance during the storage period. It is the customer’s
responsibility to submit a monthly report showing the
condition of the unit and noting any discrepancies to the
guidelines listed herein. Failure to comply with this long-
term storage recommendation may void the warranty.
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
even if they are not kept flooded with oil. A warm and
dry 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. Refer towww.johnsoncontrols.com/Frick, for
specific instructions.
Follow the guidelines in
to maintain the
screw compressor warranty.
Model
Serial number
Compressor, motor
oil pump, and re-
frigerant pump shaft
rotation 1 ½ turn
Rotor
housing
charge
Charge
added
Visual
inspection
per QAI-3
Charge
Checked by
Date
Table 7: Compressor and packaged equipment storage log
