Frick SBTP 355 Series Owner's manual

This manual contains installation, operation, and maintenance
instructions. Read thoroughly before beginning installation. Failure
to follow these instructions may result in personal injury or death,
damage to the unit, or incorrect operation.
Rotary Screw Compressor
SBTP 355 and 408 Series
Form 070.655-IOM (FEB 2022)
Installation – Operation – Maintenance
File: Service Manual – Section 070
Replaces: 070.655-IOM (MAY 2019)
Distribution: 3, 3a, 3b, 3c
Check www.FrickCold.com for the latest version of this publication.

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SBTP Rotary Screw Compressor
Installation - Operation - Maintenance
Table of Contents
General information
Design limitations ............................................................. 3
Job inspection .................................................................. 3
Standard bare compressor ............................................... 3
Transit damage claims ...................................................... 3
Compressor identification ................................................ 3
Description........................................................................ 4
Frick SBTP compressor ............................................... 4
Compressor lubrication system ................................... 4
Oil pump....................................................................... 5
Construction details...................................................... 5
Installation
Design limits ..................................................................... 7
Outline dimensions ........................................................... 7
Holding charge and storage ............................................ 15
Rigging and handling....................................................... 15
Foundation ..................................................................... 15
Customer connections .................................................... 16
Compressor oil ................................................................ 16
Oil pump ......................................................................... 16
Compressor..................................................................... 16
Mounting the motor: foot mounted only .................... 16
Connecting the compressor to the motor .................. 16
Aligning the coupling.................................................. 17
Oil heaters ...................................................................... 17
Oil filters ........................................................................ 17
Oil cooling requirements ................................................. 17
Natural gas applications ............................................. 17
Dehydration or evacuation test ....................................... 17
Installing electrical components...................................... 18
Slide stop transmitter................................................. 18
Capacity slide valve transmitter.................................. 18
Directional control valves .......................................... 18
Operation
Operation and start-up instructions ............................... 19
Compressor hydraulic system ........................................ 19
Volumizer volume ratio control ...................................... 20
Low ambient operation .................................................. 20
Initial start-up ................................................................ 20
Initial start-up procedure .......................................... 20
Normal start-up procedure ........................................ 20
Maintenance
General information ....................................................... 21
Normal maintenance operations .................................... 21
General maintenance ................................................ 21
Changing the oil ........................................................ 21
Maintenance program ............................................... 21
Maintenance schedule..................................................... 22
Vibration analysis............................................................ 22
Oil quality and analysis ................................................... 22
Operating log ................................................................. 22
Troubleshooting guide .................................................... 23
Abnormal operation analysis and correction ............. 23
Replacing the capacity linear transmitter: slide valve 23
Replacing the volumizer transmitter: slide stop.............23
Replacing the bare compressor ...................................... 24
Long-term storage.......................................................... 24
Preparing the compressor for storage............................. 25
Maintaining the compressor............................................ 25
Shutdown due to incorrect oil pressure: high stage
and booster ............................................................ 25
Troubleshooting the SBTP compressor .......................... 26
Troubleshooting the oil pump and system....................... 26
Troubleshooting the hydraulic system ............................. 27
Forms
Compressor prestart checklist......................................... 28
Drive train alignment....................................................... 29
Operating log sheet ........................................................ 29
Vibration data sheet........................................................ 30
Indicates an imminently hazardous situation, which if not avoided, results in death or serious
injury.
Indicates a potentially hazardous situation or practice, which if not avoided, results in death or
serious injury.
Safety precaution denitions
Indicates a potentially hazardous situation or practice, which if not avoided, results in damage to
equipment and/or minor injury.
Indicates an operating procedure, practice, or portion thereof,which is essential to highlight.
WARNING
CAUTION
DANGER
NOTICE

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SBTP Rotary Screw Compressor
Installation - Operation - Maintenance
General information
Note: The information in this document is subject to
change without notice.
This manual has been prepared to acquaint the owner and
servicer with the Installation, operation, and maintenance
procedures as recommended by Johnson Controls-Frick®
for SBTP Rotary Screw Compressors.
It is most important that these compressors are correctly
applied to an adequately controlled refrigerant or gas
system. Consult your authorized Johnson Controls-Frick
representative for expert guidance in this determination.
Effective performance and continued satisfaction with
these units depends on the following factors:
• Correct installation
• Correct operation
• Regular, systematic maintenance
To ensure correct installation and application, select
the appropriate equipment and connect to a correctly
designed and installed system. The engineering plans,
piping layouts, and other system design materials must be
detailed in accordance with the best practices and local
codes, such as those outlined in ASHRAE and API litera-
ture.
A screw compressor is a vapor pump. To ensure that
working uid in the liquid state is not being ingested, per-
form the following checks:
• Select controls carefully. Make sure they are in good
operating condition.
• Size piping and arrange traps correctly, if they are
necessary.
• Check that the suction line has an accumulator or slug-
ging protection.
• Know the load surges and make provisions for control.
• Check that operating cycles and stand still periods are
reasonable.
• Size high-side components within system and com-
pressor design limits.
It is necessary to keep the discharge temperature high
enough to prevent condensation of any moisture in the
compressor and oil separator.
Design limitations
Frick compressors are designed for operation within the
pressure and temperature limits which are specied by
Johnson Controls-Frick and our CoolWare™selection soft-
ware. They are primarily used for compressing refrigerant
gas and most hydrocarbon gasses.
If your application is for sour gas, there are special re-
quirements to protect the compressor. Contact Johnson
Controls-Frick Compressor Engineering for application
details.
Job inspection
Immediately upon delivery, examine all crates, boxes, and
exposed compressor and component surfaces for damage.
Unpack all items and check against shipping lists for any
discrepancy. Examine all items for damage in transit.
Standard bare compressor
Items not included with bare compressor that are available
as sales order options include a solenoid valve block, and
solenoid valves.
Transit damage claims
All claims must be made by consignee. This is an ICC
requirement. Request immediate inspection by the agent
of the carrier and be sure the correct claim forms are ex-
ecuted. Report damage or shortage claims immediately to
Johnson Controls-Frick Sales Administration Department,
Waynesboro, PA.
Compressor identification
Each compressor has an identication data plate, contain-
ing compressor model and serial number mounted on the
compressor body.
NOTICE
When inquiring about the compressor or unit, or
ordering repair parts, provide the model, serial, and
Frick sales order numbers from the data plate. See
Figure 1.
Figure 1: Identication data plate
100 CUMBERLAND VALLEY AVENUE
WAYNESBORO, PA 17268
ROTARY SCREW COMPRESSOR
MODEL NO.
MAX DRIVER SPEED MAX ALLOWABLE PRESSURE
PART NO.
RPMPSIG BARG
ASSEMBLED IN
FROM FOREIGN AND DOMESTIC MATERIALS
SERIAL NO.

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SBTP Rotary Screw Compressor
Installation - Operation - Maintenance
Rotary screw compressor serial numbers are dened by
the following information:
Example: 10240A90000015Z
Plant Decade Month Year Global
seq. no.
Additional
remarks
1024 0 A 9 0000015 Z
Month:
A = JAN, B = FEB, C = MAR, D = APR, E = MAY, F = JUN,
G = JUL, H = AUG, K = SEP, L = OCT, M = NOV, N = DEC
Additional remarks
R = Remanufactured
Z = Deviation from Standard Conguration
The name plates in Figure 2 show which refrigerants are
compatible with the compressor as manufactured.
Figure 2: Refrigerant name plates
R290, R1270, NATURAL GAS
COMPRESSOR OPERATES ON AND IS
COMPATIBLE WITH THE FOLLOWING
REFRIGERANTS
Compressor
model
Rotor
diameter
mm
Rotor
L/D
Max
speed
rpm
Theoretical
displacement
ft³/rev (m³/rev)
Displacement at
3550 rpm
driver speed
ft³/rev (m³/rev)
Displacement at
2950 rpm
driver speed
ft³/rev (m³/h)
3511 355 1.1 3,600 0.82248 (0.02329) 2,929 (4,976) 2,434 (4,135)
3515 355 1.5 3,600 1.12124 (0.03175) 3,994 (6,786) 3,319 (5,639)
3519 355 1.9 3,600 1.42748 (0.04042) 5,058 (8,594) 4,203 (7,141)
3524 355 2.4 3,600 1.80329 (0.05106) 6,390 (10,857) 5,310 (9,022)
4013 408 1.3 3,600 1.41180 (0.03998) 5,012 (8,515) 4,165 (7,076)
4018 408 1.8 3,600 1.95481 (0.05535) 6,940 (11,790) 5,767 (9,798)
4021 408 2.13 3,600 2.31319 (0.06550) 8,212 (13,952) 6,824 (11,594)
Table 1: Compressor specications
Description
Frick SBTP compressor
Frick SBTP rotary screw compressors use mating asym-
metrical prole helical rotors to provide a continuous ow
of vapor and are designed for both high-pressure and
low-pressure applications. The compressor incorporates
the following features:
• High-capacity sleeve bearings to carry radial loads at
both the inlet and outlet ends of the compressor.
• Heavy-duty, tilt-pad thrust bearings mounted at the
discharge end of the compressor to carry axial loads.
• Moveable slide valve to provide fully modulating
capacity control from 100% to approximately 15%,
condition dependent, of full load capacity.
• Volumizer volume ratio control to allow innitely vari-
able volume ratio between minimum and maximum
values during compressor operation.
• A hydraulic cylinder to operate the slide stop and slide
valve.
• Housings are designed for 600 psig pressure.
• Shaft seal housing is designed to maintain operating
pressure on seal well below discharge pressure for
increased seal life.
• Oil injected into the rotors to maintain good volumetric
and adiabatic efciency even at very high compression
ratios.
• The shaft rotation clockwise facing compressor from
the drive end, suitable for all types of drives. See the
following warning.
WARNING
Compressor rotation is clockwise when facing the
compressor drive shaft. Never operate the compres-
sor in reverse rotation because this can result in
bearing damage.
• ANSI B16.1 Class 300 suction and discharge anges for
all models.
• Specified #60 mesh x 0.0065 in. diameter stainless
steel wire or better strainer, to prevent damage to the
compressor from particles entering the suction area.
Compressor lubrication system
The lubrication system on an SBTP screw compressor per-
forms several functions:
• Provides lubrication to bearings and seal.
• Provides a cushion between the rotors to minimize
noise and vibrations.
• Helps keep the compressor cool and prevents over-
heating.
• Provides an oil supply to hydraulically actuate the slide
valve and slide stop.
• Provides an oil seal between the rotors to prevent ro-
tor contact or gas bypassing.

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SBTP Rotary Screw Compressor
Installation - Operation - Maintenance
Oil pump
A full-time lube oil pump is required for all sleeve bear-
ing compressor applications. Refer to CES 6608 for basic
oil pump requirements and basic piping diagrams. Actual
system operating conditions may necessitate the need for
piping systems other than those addressed by CES 6608.
Contact Johnson Controls-Frick Service for assistance.
The pump must be run before starting the compressor to
ensure adequate oil pressure and temperature is being
supplied to the machine. Do this by using an automated
diverting valve that bypasses oil ow back to the oil sepa-
rator until the correct oil conditions are veried. After this
the diverter valve switches to direct oil to the compressor,
at which point you can start the compressor. At shutdown,
the oil pump must continue to run until the compressor
has stopped rotating. Failure to provide adequate oil pres-
sure and temperature to the compressor while it is running
may lead to equipment damage.
Construction details
Housing: all SBTP screw compressor castings are steel
to ensure structural integrity and mechanical and thermal
stability under all operating conditions.
Rotors: the rotors are machined from AISI-1141 or Y40Mn
steel to the exacting tolerances of the latest Frick prole.
The male rotor is directly connected to the driver while
the female rotor is driven by the male on a thin oil lm.
Bearings: SBTP compressor models use API compliant
journal bearings and tilting pad thrust bearings to absorb
radial and axial loads respectively. The cylindrical sleeve
bearings are oil grooved for optimal lubrication and higher
radial load capability. The tilting pad thrust bearing uses
offset pads and directed lubrication to minimize power
loss and maintain lower bearing temperatures at lower oil
ows for maximum bearing life .
Shaft seal: the compressor is supplied with a single-
face type mechanical shaft seal with metallic stationary
and rotating faces. Materials vary to suit the application.
Tandem style seals can also be supplied at additional cost
if required The seal is capable of withstanding static pres-
sure up to 700 psig.
Volumizer variable volume ratio control: the Frick com-
pressor includes a method of varying the internal volume
ratio to match the system pressure ratio. Control of the in-
ternal volume ratio eliminates the power penalty associated
with over- or under-compression. Volume ratio control is
achieved by the use of a slide stop which is a movable por-
tion of the rotor housing that moves axially with the rotors
to control discharge port location. The slide stop is moved
by hydraulic actuation of a control piston.
Stepless capacity control: capacity control is achieved
by use of a movable slide valve. The slide valve moves
axially under the rotors to provide fully modulated capac-
ity control from 100% to approximately 12% minimum
load capacity. Approximate minimum load capacity varies
slightly with compressor model, pressure ratio, discharge
pressure level, and rotor speed.
The slide valve is positioned by hydraulic movement of its
control piston. When in the unloaded position, gas is by-
passed back to suction through a recirculation slot before
compression begins and any work is expended, providing
the most efcient unloading method available for part-
load operation of a screw compressor.

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Installation - Operation - Maintenance
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SBTP Rotary Screw Compressor
Installation
Installation
Design limits
General information for all of the models is provided in the
following sections. See CoolWare™to determine the limits
for a specic application.
Do not exceed the rotor and bearing design set limitations
of any compressor. Refer to CoolWare™for more
information.
Outline dimensions
See Figure 3 to Figure 12 for port locations. Drawings are
for reference only. Refer to outline drawing 534E1598
for 355 series and 534E1279 for 408 series for complete
dimensions and access connections. If you do not have
this drawing, you can request it by contacting Johnson
Controls-Frick sales.

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SBTP Rotary Screw Compressor
Installation
Figure 3: SBTP 355 compressor port locations
Figure 4: SBTP 355 compressor port locations, view A-A
Suction
3511 compressor
10 - 300# ANSI ange
1 in. - 8 UNC-2B x 2.13 DP
Proximity sensor
phase probe
4X radial bearing RTD
4X proximity sensor
vertical probe
4X proximity sensor
horizontal probe
Proximity
sensor
female axial
probe
Proximity sensor
male axial probe
View A-A

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SBTP Rotary Screw Compressor
Installation
Figure 5: SBTP 355 compressor port locations, view B-B
Figure 6: SBTP 355 compressor port locations, view C-C
Axial bearing RTD
Axial bearing RTD
2x Axial bearing RTD
View B-B
View C-C

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SBTP Rotary Screw Compressor
Installation
SC-15
SC-5
ST-1
SM-1
SC-9
SV-1
SC-6
ST-2
Figure 8: SBTP 408 compressor port locations
SD-1
Discharge
10 in. - 300# ANSI ange
1 in. - 8 UNC-2B x 2.25 DP
Standard piping arrangement
View D-D
View E-E
Figure 7: SBTP 355 compressor port locations, view D-D and E-E

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SBTP Rotary Screw Compressor
Installation
SE-1
SC-1
SB-2 SC-5
SP-1
SP-2
SB-3
SC-7
SE-2
View A-A
Proximity sensor
axial probe
4X proximity sensor
horizontal probe
4X radial bearing RTD
4X proximity sensor
vertical probe
2X proximity sensor
phase probe
Suction compressors
4018 and 4021
16 in. - 400# ANSI ange
1 1/4-7 UNC-2B x 2.56 DP
20X on 22.500 B.C.
Compressor 4013
12 in. - 400# ANSI ange
1 1/4-7 UNC-2B x 2.18 DP
16X on 17.750 B.C.
Proximity sensor
axial probe
Figure 9: SBTP 408 compressor port locations, view A-A
SC-4
SC-4
View B-B
SC-12
SC-8
Figure 10: SBTP 408 Compressor port locations, view B-B

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SBTP Rotary Screw Compressor
Installation
SC-10
SC-11
Axial bearing RTD
Axial bearing RTD
Axial bearing RTD
View C-C
Figure 11: SBTP 408 compressor port locations, view C-C
Axial bearing RTD
View E-E
View D-D
T
SL-1 SC-3
SC-2
SL-2
P
Discharge
Figure 12: SBTP 408 compressor port locations, view D-D and E-E

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SBTP Rotary Screw Compressor
Installation
Port Size O-ring Description
SB-2 1 in. -300# ANSI, 5/8-11 UNC, 1.38 DP - Oil feed inlet bearings
SB-3 2 in. -300# ANSI, 5/8-11 UNC, 1.25 DP - Oil feed outlet bearings and seal
SC-1 9/16-18 UNF-2B straight thread o-ring 980A0013K58 Slide valve
SC-3 3/4-16 UNF-2B straight thread o-ring 980A0013K60 Slide stop
SC-4 3/4-16 UNF-2B straight thread o-ring 980A0013K60 Cylinder drain
SC-5 1 1/16-12 UN-2B straight thread o-ring 980A0013K64 Suction pressure
SC-6 1 1/16-12 UN-2B straight thread o-ring 980A0013K64 Discharge pressure/slide valve tool
SC-7 3/4-16 UNF-2B straight thread o-ring 980A0013K60 Oil pressure
SC-8 1/8-27 NPTF - Seal weepage
SC-11 1 1/16-12 UN-2B straight thread o-ring 980A0013K64 Drain/discharge pressure
SC-12 3/4-16 UNF-2B straight thread o-ring 980A0013K60 Drain/suction pressure
SC-13 1 1/16-12 UN-2B straight thread o-ring 980A0013K64 Inlet bearing drain/suction pressure
P 3/4-16 UNF-2B straight thread o-ring 980A0013K60 Cylinder pressure (manifold block pressure)
T 3/4-16 UNF-2B straight thread o-ring 980A0013K60 Cylinder vent (manifold block tank)
SD-1 1 1/16-12 UN-2B straight thread o-ring 980A0013K64 Coalescer bleed/suction pressure
SE-1 DIN connector - Slide valve
SE-2 DIN connector - Slide stop
SM-1 1 1/2 in. -300# ANSI, 3/4-10 UNC, 1.75 DP - Main oil injection
SP-1 1/4-28 UNF-2B, 0.68 DP - Suction accelerometer
SP-2 1/4-28 UNF-2B, 0.68 DP - Discharge accelerometer
ST-2 1 1/16-12 UN-2B straight thread o-ring 980A0013K64 Discharge temperature
SV-1 2 1/2-300# ANSI, 3/4-10 unc, 1.75 DP - Vapor injection (3511 compressor)
3-300# ANSI, 3/4-10 UNC, 1.75 DP - Vapor injection (3515, 3519, 3524 compressors)
Note: While liquid injection oil cooling is an option for anti-friction Frick screw compressors, Frick does not suggest it for
compressors supplied with tilting pad thrust bearings.
Table 2: 355 series port information

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SBTP Rotary Screw Compressor
Installation
Port Size O-ring Description
SB-2 1 in. -300# ANSI, 5/8-11 UNC, 1.37 DP - Inlet bearings (4018, 4021)
1 in.-600# ANSI, 5/8-11 UNC, 1.37 DP - Inlet bearings (4013)
SB-3 2 in.-300# ANSI, 5/8-11 UNC, 1.75 DP - Outlet bearings (4018, 4021)
2 in.-300# ANSI, 5/8-11 UNC, 1.75 DP - Outlet bearings (4013)
SC-1 9/16-18 UNF-2B straight thread o-ring 980A0013K58 Slide valve
SC-2 9/16-18 UNF-2B straight thread o-ring 980A0013K58 Slide valve
SC-3 9/16-18 UNF-2B straight thread o-ring 980A0013K58 Slide stop
SC-4 9/16-18 UNF-2B straight thread o-ring 980A0013K58 Cylinder drain
SC-5 3/4-16 UNF-2B straight thread o-ring 980A0013K60 Suction pressure
SC-6 3/4-16 UNF-2B straight thread o-ring 980A0013K60 Discharge pressure
SC-7 3/4-16 UNF-2B straight thread o-ring 980A0013K60 Oil pressure
SC-8 1/8-27 NPTF - Seal weepage
SC-9 1 7/8-12 UN-2B straight thread o-ring 980A0013K70 Closed thread pressure
SC-10 2 1/2-12 UN-2B straight thread o-ring 980A0013K69 Slide valve tool/discharge pressure
SC-11 1 5/8-12 UN-2B straight thread o-ring 980A0013K69 Drain/discharge pressure
SC-12 3/4-16 UNF-2B straight thread o-ring 980A0013K60 Drain/suction pressure
P 3/4-16 UNF-2B straight thread o-ring 980A0013K60 Cylinder pressure (manifold block pressure)
T 3/4-16 UNF-2B straight thread o-ring 980A0013K60 Cylinder vent (manifold block tank)
SD-1 1 1/16-12 UN-2B straight thread o-ring 980A0013K64 Coalescer bleed/suction pressure
SE-1 DIN connector - Slide valve
SE-2 DIN connector - Slide stop
SL-1 1 1/2-300# ANSI, 3/4-10 UNC, 1.75 DP - Low Vi liquid injection (4018, 4021)
1 1/2-600# ANSI, 3/4-10 UNC, 1.75 DP - Low Vi liquid injection (4013)
SL-2 1 1/2-300# ANSI, 3/4-10 UNC, 1.75 DP - High Vi liquid injection (4018, 4021)
1 1/2-600# ANSI, 3/4-10 UNC, 1.75 DP - High Vi liquid injection (4013)
SM-1 3-300# ANSI, 3/4-10 UNC, 1.63 DP - Main oil injection (4018, 4021)
3-600# ANSI, 3/4-10 UNC, 1.63 DP - Main oil injection (4013)
SP-1 1/4-28 UNF-2B, 0.68 DP - Suction accelerometer
SP-2 1/4-28 UNF-2B, 0.68 DP - Discharge accelerometer
ST-1 1 1/16-12 UN-2B straight thread o-ring 980A0013K64 Suction temperature
ST-2 1 1/16-12 UN-2B straight thread o-ring 980A0013K64 Discharge temperature
SV-1 4-300# ANSI, 3/4-10 UNC, 1.63 DP - Vapor injection (4018, 4021)
3-600# ANSI, 3/4-10 UNC, 1.88 DP - Vapor injection (4013)
Note: While liquid injection oil cooling is an option for anti-friction Frick screw compressors, it is not recommended for com-
pressors supplied with tilting pad thrust bearings.
Table 3: 408 series port information

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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 Long-term storage 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
eld 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 specic
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 sufcient 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
anges.
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 Table 5
for allowable ange loads.
Lifting rings

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SBTP Rotary Screw Compressor
Installation
Table 5: Allowable ange loads
Noz.
size
NPS
Moments (ft-lbf) Load (lbf)
Axial Vert. Lat. Axial Vert. Lat.
MR MC ML P VC VL
1 25 25 25 50 50 50
1.25 25 25 25 50 50 50
1.5 50 40 40 100 75 75
2 100 70 70 150 125 125
3 250 175 175 225 250 250
4 400 200 200 300 400 400
5 425 400 400 400 450 450
6 1,000 750 750 650 650 650
8 1,500 1,000 1,000 1,500 900 900
10 1,500 1,200 1,200 1,500 1,200 1,200
12 1,800 1,500 1,600 1,500 1,400 1,200
14 2,000 1,800 1,800 1,700 2,000 2,000
16 2,250 2,000 2,000 1,700 2,200 2,000
Customer connections
As a minimum, you must connect the lube oil system
to the following locations in addition to the suction and
discharge:
Table 6: Necessary port connections
Port Description
SB-2 Inlet bearings
SB-3 Discharge bearings and
shaft seal
SM-1 Main oil injection
SC-13 Manifold block pressure,
on manifold block
Other connections are available for instrumentation and
service as noted on the dimensional outline drawings.
NOTICE
You must connect the electrical connections for the
slide stop and the slide valve transmitters, and the
solenoid valve coils to your control system.
The oil supply system for the compressor must be de-
signed for a total pressure drop of no more than 15 psi
with a new oil lter element. This is critical because an
excessive pressure drop in the oil circuit can prevent the
slide valve and slide stop pistons from operating correctly.
Compressor oil
WARNING
Only Frick approved oil is recommended. No ad-
ditives are approved. Do not mix oils of different
brands, manufacturers, or types. Mixing of oils
can cause excessive oil foaming, nuisance oil level
cutouts, oil pressure loss, gas or oil leakage and
catastrophic compressor failure. CoolWare selects
a specic Frick oil for the refrigerant being used.
Depending on the application, a different oil can be
selected provided it is of the correct viscosity and
is compatible with the refrigerant and compressor
elastomers.
Oil pump
All SBTP compressor applications require an oil pump, and
Frick suggests mounting a strainer upstream to protect it.
Frick supplied pumps are a positive displacement gear or
screw type that must have a safety relief valve to ensure
that the unit does not exceed maximum oil pressure.
Compressor
Note: Compressor rotation is clockwise when facing the
end of the compressor shaft.
Conrm the motor can rotate the compressor clockwise
before installing the coupling.
Mounting the motor: foot mounted only
1. Thoroughly clean the motor feet and mounting pads of
grease, burrs, and other foreign matter to ensure rm
seating of the motor.
2. Attach the motor to the base using bolts and motor
raising blocks, if required.
3. Weld the four kick bolts, which are not included with
compressor, into place so that they are positioned to
allow movement of the motor feet.
4. After setting the motor, check to see that the shafts
are spaced correctly for the coupling being used. Check
the appropriate dimensional outline drawing for the
minimum clearance required between the shaft ends to
change the shaft seal.
Connecting the compressor to the motor
Frick SBTP compressors are arranged for direct motor drive
and require a exible drive coupling to connect the compres-
sor to the motor.
If you are using the Johnson Controls–Frick motor mount,
the mount is machined to ensure that motor to compressor
alignment is in specication. See Mounting the motor: foot
mounted only for details.
With a foot-mounted motor, it is essential that the coupling
is correctly aligned to ensure the correct bearing and seal
performance:
• Select and install the coupling so that it doesn’t trans-
mit any axial load to the compressor shaft.
• Set up the minimum distance between compressor

070.655-IOM (FEB 22)
Page 17
SBTP Rotary Screw Compressor
Installation
shaft and motor shaft to allow for seal removal. See
the relevant outline drawings in Figure 3 to Figure 12.
• The coupling must be able to take up any misalignment
between motor and compressor. It is critical to the life
of the shaft seal that misalignment is kept to the mini-
mum possible value. Ensure you follow the coupling
manufacturer’s guidelines for checking and correcting
any misalignment.
Aligning the coupling
You must perform a coupling alignment before start-up:
1. After installing the compressor on the job site, check
the alignment again and correct if necessary before
start-up.
2. After a few hours operation, check the alignment while
the package is still hot. Correct hot alignment is criti-
cal to ensure the life of the shaft seal and compressor
bearings.
Note: The maximum radial runout is 0.004 in. total indica-
tor reading. The maximum axial runout is 0.004 in.
total indicator reading.
3. Use a dial indicator or another appropriate measuring
device to determine the total indicator runout.
4. Check the indicator bracket sag because all brackets
have some exibility. The best way to measure this is
as follows:
a. Attach the dial indicator and bracket on a pipe at the
coupling span distance.
b. Zero the indicator in the 12:00 position.
c. Rotate the pipe so the indicator is in the 6:00
position. The reading on the indicator in the 6:00
position is the bracket sag.
You must include this value in the dial indicator readings
when afxed to the coupling for an accurate alignment.
Oil heaters
Your package must be equipped with oil heaters that
provide sufcient heat to prevent condensation from oc-
curring during shutdown cycles. In addition, Frick strongly
suggests heat tracing for all of the lube oil lines includ-
ing oil lters and the oil cooler. Activate the heat tracing
during compressor shutdown to ensure that all of the lube
system is up to the correct temperature before startup.
Oil filters
Using lter elements other than Johnson Controls-Frick
must be approved in writing by Johnson Controls-Frick
engineering or a warranty claim may be denied. Typical
oil lter specication β5 = 75 according to ISO 4572 is
required to obtain the recommended oil cleanliness class
16/14/11 according to ISO 4406.
Oil cooling requirements
Compressor oil needs to be cooled to control the discharge
temperature, maintain the appropriate oil viscosity, and to
preserve the life of the oil. Normally the discharge tempera-
ture is between 170°F to 180°F. See CoolWare™to determine
your conguration.
The main oil injection line that is connected to port SM1 must
have a regulating valve to permit adjustment of the oil ow to
maintain the appropriate discharge temperature at all times.
Frick suggests using a three-way mixing valve to keep the
oil temperature in the normal range of 120°F to 140°F.
The valve provides warm oil to the compressor quickly, re-
ducing the pressure drop caused by cold, viscous oil. This
ensures the correct oil ow and temperature over the full
range of operating conditions.
While liquid injection oil cooling is an option for anti-
friction Frick screw compressors, it is not recommended
for compressors supplied with tilting pad thrust bearings.
Acceptable methods of oil cooling would use either water,
air, or refrigerant cooled oil coolers.
Natural gas applications
One application that usually requires higher discharge
temperatures, as high as 250°F, is natural gas gathering at
the wellhead. Moisture is normally present in the gas and
it is imperative that the discharge temperature be at least
30°F higher than the discharge dew point temperature for
the gas.
1. Open CoolWare and from the Wet/Dry Mode list, se-
lect Water Saturated.
2. Select Calculate to get the discharge dew point tem-
perature for your application.
Oil temperatures as high as 170°F can be used to achieve
the necessary discharge temperature to prevent moisture
from condensing in the oil separator. Contact Johnson
Controls–Frick for additional information for natural gas
compression.
Dehydration or evacuation test
Evacuate the system to 1000 microns. Valve off the
vacuum pump and hold vacuum for 1 h.
Pass:vacuum cannot rise more than 500 microns during
1 h hold period.
Fail: vacuum rise is more than 500 microns during 1 h
hold period. Identify and repair any system leaks. Repeat
vacuum test until requirements are met.

070.655-IOM (FEB 22)
Page 18
SBTP Rotary Screw Compressor
Installation
Installing electrical components
Slide stop transmitter
The slide stop transmitter measures the position of the
slide stop (SS) using a 20 to 4 mA signal to cover the
range of minimum to maximum Vi. See Figure 14. The
signal is sent to your control system so that it can adjust
the position of SS according to system pressures. The
correct SS position is important to achieve the most ef-
cient compressor operation. Connect to ± and signal as
shown in Figure 15. Refer to the latest Quantum Control-
ler Operations manual for calibration procedure, currently
090.070-O. Contact Frick for the most up-to-date version.
Figure 14: Slide stop transmitter
Figure 15: Wiring diagram for slide stop transmitter
Capacity slide valve transmitter
The slide valve transmitter measures the position of the
slide valve (SV) and sends a 4 to 20 mA signal to your
control system. See Figure 16 and Figure 17. The control-
ler adjusts the position of the SV according to the mo-
tor load setpoint. The position is important in order to
correctly load the compressor and motor. It is important
not to overload the compressor and motor. Observe the
maximum power input and ensure design limitations are
not exceeded. Connect to ± and signal as shown in the
Figure 17. For compressor panel instructions, refer to the
latest Quantum Controller Operations, currently
090.070-O. Contact Frick for the most up-to-date version.
Figure 16: Capacity slide valve transmitter
ENDVIEW
DIN CONNECTOR
STAINLESS STEEL WELL
HEAT ISOLATOR
CAST ALUMINUM HOUSING
COMPRESSOR UNLOAD CYLINDER
SHADED AREA SHOWS
CAPACITY LINEAR TRANSMITTER
Note: Shaded are shows capacity linear transmitter.
Figure 17: Wiring diagram for slide valve transmitter
Directional control valves
You must wire solenoids YY1, YY2, YY3 and YY4 to give
the correct function. See the Compressor hydraulic system
section for a description of their function. For control
system information, refer to the latest Quantum Control-
ler Operations, currently 090.070-O. Contact Frick for the
most up-to-date version. See the following figure.
Figure 18: Directional control valve wiring diagram
Cast aluminum housing
DC isolated to ground
Supply 12 VDC
Out 20-4 mA
PCB
GND
Stroke
DIN connector 43650-A
Printed circuit board
Cast aluminum housing
Stainless steel
sensor well
DIN connector
Heat isolator
End view
Stainless steel well
Compressor unload cylinder
Cast aluminum housing
Cast aluminum housing
Stroke
GND
Out 4-20 mA
Supply 12 VDC to 24 VDC
PCB
Slide valve load
NeutralHot
Slide valve unload
Slide stop increase
Slide stop decrease

070.655-IOM (FEB 22)
Page 19
SBTP Rotary Screw Compressor
Operation
Operation
Operation and start-up instructions
The Frick SBTP rotary screw compressor is a compo-
nent in an integrated system. As a result, the compressor
requires some specic operation and conditions to ensure
trouble-free running.
The information in this section provides logical step-
by-step instructions to correctly start up and operate
the SBTP rotary screw compressor in your unit. It only
includes matters that may inuence the correct operation
of the SBTP compressor.
Read and ensure you understand the following sections
before attempting to start or operate the unit.
Compressor hydraulic system
Note: The solenoid valves and manifold block are
available as a sales order option.
The compressor hydraulic system actuates the movable
slide valve (SV) to load and unload the compressor. It also
actuates the movable slide stop (SS) to increase or de-
crease the compressor’s volume ratio (Vi).
The hydraulic cylinder located at the inlet end of the SBTP
compressor serves a dual purpose. It is separated by a xed
bulkhead into two sections: the SV section is on the for-
ward side of the bulkhead and the SS is aft of the bulkhead
when viewed from the non-drive end of the compressor.
Both operations are controlled by solenoid valves, which
are actuated when a signal from the appropriate micropro-
cessor output energizes the solenoid valve.
Single-acting mode: high stage
Valve opens at SC1
Valve closes at SC2
Valve opens at bypass (BP)
See Figure 20 for details.
High-stage compressor loading: the compressor loads
when SV solenoid YY2 is energized and oil ows from the
unload side of the cylinder out port SC1, through valve
ports A and T to compressor suction. Simultaneously,
discharge pressure loads the slide valve.
High-stage compressor unloading: the compressor
unloads when SV solenoid YY1 is energized and oil ows
from the oil manifold through valve ports P and A to cylin-
der port SC1 and enters the unload side of the cylinder. Si-
multaneously, gas on the load side of the cylinder is vented
through port SC2 and valve BP to compressor suction.
NOTICE
To control the rate of loading and unloading, throttle
the needle valve at SC1 port.
CAUTION
You must use single-acting mode for compressors
with differential pressures above 200 psid in order to
prevent failure of the slide valve piston retaining nut.
Double-acting mode: booster, low differential
Valve opens at SC1
Valve opens at SC2
Valve closes at BP
See Figure 20 for details.
Booster compressor loading: The compressor loads when
SV solenoid YY2 is energized and oil ows from the oil
manifold through valve ports P and B to cylinder port SC2
and enters the load side of the cylinder. Simultaneously,
oil contained in the unload side of the cylinder ows out
cylinder port SC1 through valve ports A and T to compres-
sor suction.
Booster compressor unloading: The compressor unloads
when SV solenoid YY1 is energized and oil ows from the
oil manifold through valve ports P and A to cylinder port
SC1 and enters the unload side of the cylinder. Simultane-
ously, oil contained in the load side of the cylinder ows
out of compressor port SC2 through valve ports B and T to
compressor suction.
NOTICE
To control the rate of loading and unloading, throttle
valves SC1 and SC2. Optional ow control valves are
available (FC1 and FC2) for ner speed adjustment.
NOTICE
To slow all valve movements - loading, unload-
ing, and Vi change - a optional customer supplied
throttle valve can be used upstream of connection P.
Figure 19: Solenoid valve block
Special throttling control valve blocks are available with
needle valves and check valves on each port direction.
You can order through Frick sales on new orders or parts
on aftermarket.
CAUTION
Never open valve BP and valve SC2 at the same time
during compressor operation.

070.655-IOM (FEB 22)
Page 20
SBTP Rotary Screw Compressor
Operation
Volumizer volume ratio control
Open valve at SC3
Compressor Vi increase: the volume ratio Vi is increased
when MSS solenoid valve YY3 is energized and oil ows
from the oil manifold through valve ports P and A to com-
pressor port SC3, enters the increase side of the cylinder
and overcomes spring tension.
Compressor Vi decrease: the volume ratio Vi is decreased
when MSS solenoid valve YY4 is energized and oil ows
from SC3 through valve ports A and T to compressor port
T1.
To control the rate of Vi change, throttle the needle valve
at SC3 port.
Low ambient operation
Frick suggests insulating package oil separators as a mini-
mum requirement to preserve the heat generated by the
oil heaters, to prevent condensation, and secure lubrica-
tion at start-up.
Initial start-up
Before start-up, you must complete the prestart checklist.
See Compressor prestart checklist.
Initial start-up procedure
After completing the prestart check, the compressor unit
is ready for start-up. It is important that an adequate gas
load be available to load test the unit at normal operating
conditions. Keep the following points in mind during initial
start-up:
1. For effective and safe operation, the compressor must
be run at the correct speed and discharge pressure.
Exceeding design conditions creates a potential hazard.
2. After 1 h to 3 h of operation adjust oil cooling system.
3. Pull and clean suction strainer after 24 h of operation.
If it is excessively dirty, repeat every 24 h until system
is clean. Otherwise, follow the normal maintenance
schedule.
4. Perform a vibration analysis if equipment is available.
Normal start-up procedure
1. Conrm system conditions permit starting the com-
pressor.
NOTICE
Ambient temperatures need to be high enough to
prevent excessive condensing; otherwise, initiate oil
heaters and heat tracing 24 h before start-up.
2. Start the unit.
3. Observe the compressor unit for mechanical tight-
ness of the external piping, bolts and valves. Ensure
that the machine has no oil and vapor leaks. If any of
these occur, shut down the compressor and correct the
problem as necessary using good safety practices.
P
Oil pressure in
T
Oil pressure out
SC1
YY1 YY2 YY3 YY4
SC-1
SC-2
SC-3
T1
SC2
1
1
A A
P PT T
B B
1
2
2 2
2
2
2
1
1
1
1
2
BP
SC3
FC1 FC2
Optional ow control valve Optional ow control valve
Volume ratio (VI) - Increase (slide stop)
Oil pressure out (internal)
Capacity - unload (slide valve)
Capacity - load (slide valve)
Hydraulic valve
top view
BP
SC2 SC1
SC3
Figure 20: Hydraulic schematic