070.655-IOM (FEB 22)
Page 25
SBTP Rotary Screw Compressor
Maintenance
Preparing the compressor for
storage
If it is necessary to store the compressor for use at a later
date, perform the following steps:
1. Evacuate the compressor to remove moisture.
2. Connect the evacuation lines to port SM1.
3. Connect the evacuation lines to the Schrader access
valves provided with the compressor. One valve is con-
nected to the compressor suction and the other valves
are located at the block on the cylinder.
4. Break vacuum with dry nitrogen and bring pressure to
0 psig.
5. Pump oil into the SM1. Johnson Controls-Frick sug-
gests break-in oil P/N 111Q0831809 for storage pur-
poses.
6. After the compressor is oil charged, pressurize to be-
tween 5 psig to 15 psig with nitrogen.
See the following table for the amounts of oil needed for
each compressor.
Table 8: Necessary oil volume
Model
Oil volume (gal)
3511
77
3515
94
3519
110
3524
131
4013
100
4018
115
4021
120
Maintaining the compressor
• Ensure that the 5 psig to 15 psig nitrogen charge is
maintained. 15 psig is preferred.
• Rotate the male rotor shaft every two weeks. Mark the
shaft to ensure the rotor does not return to the original
position.
• Store the compressor inside a dry building environ-
ment.
• Grease the male rotor shaft to prevent rust.
• Record all information in a compressor long term stor-
age log. See
Contact Johnson Controls-Frick Service with any questions
regarding long-term storage.
Shutdown due to incorrect oil
pressure: high stage and booster
The compressor must not operate with incorrect oil pressure.
Refer to the relevant
Control setup
