070.655-IOM (FEB 22)
Page 15
SBTP Rotary Screw Compressor
Installation
Holding charge and storage
Every SBTP compressor is pressure and leak tested at the
Johnson Controls–Frick factory and then thoroughly evacu-
ated and charged with dry nitrogen to ensure its integrity
during shipping and short-term storage before installation.
When storing the units, ensure the following:
• Keep all compressors in a clean, dry location to prevent
corrosion damage.
• When storing compressors for more than two months,
check their nitrogen charge periodically.
• When storing compressors for more than six months,
See
for instructions and refer
to
020.050-W Limited Warranty Screw Compressor
Purchased for Long-Term Storage for Frick Bare Screw
Compressors
.
WARNING
Holding-charge shipping gauges, if mounted, are
rated for 30 psig and are for checking the shipping
charge only. Remove them before pressure testing
and operating the system. Failure to remove these
gauges may result in catastrophic failure of the
gauge resulting in serious injury or death.
Access valves are bronze and you must replace them with
steel plugs when the package is assembled.
CAUTION
This equipment has been pressurized with nitrogen
gas. Temporary valves and gauges have been installed.
1. Relieve pressure before opening lines or making
field connections.
2. Remove charging valves or gauges before pressur-
izing system.
3. Refer to installation operation and maintenance
manual for additional information.
Escaping gas may cause injury
Rigging and handling
You can move the compressor with rigging using a crane
or forklift by hooking into the two lifting rings at each end
of the main housings. Only use the compressor lifting rings
to lift the compressor itself. See the following figure:
Figure 13: Lifting rings: not model specific
LIFTING RINGS
Foundation
Note:
For more detailed information on screw compressor
foundations, refer to
Screw Compressor Founda-
tions, 070.210-IB
.
Each SBTP rotary screw compressor is shipped mounted on
a wooden skid. Remove the skid before installing the unit.
CAUTION
Allow appropriate spacing for servicing. See the rel-
evant dimensional outline drawing.
The first requirement of the compressor foundation is that
it must be able to support the weight of the compressor
package.
Table 4: Compressor weight
Model
Weight
lb
kg
3511
8,847
4,013
3515
9,701
4,400
3519
10,704
4,855
3524
11,852
5,376
4013
15,733
7,136
4018
17,342
7,866
4021
18,592
8,433
Screw compressors are capable of converting large quan-
tities of shaft power into gas compression in a relatively
small space. The compression process creates relatively
high-frequency vibrations that require sufficient mass in
the base to effectively dampen them.
The best insurance for a trouble-free installation is to
firmly anchor the compressor to a suitable foundation
using the correct bolting and by preventing piping stress
from being imposed on the compressor.
After rigging the compressor into place, shim its feet to
level it. There must be absolutely no stresses introduced
into the compressor body due to bolting the feet and
flanges.
In any screw compressor installation, ensure suction and
discharge lines are supported in pipe hangers, preferably
within 2 ft of vertical pipe run, so that the lines won’t
move if disconnected from the compressor. See
for
allowable flange loads.
Lifting rings
