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.

070.655-IOM (FEB 22)
Page 2
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

070.655-IOM (FEB 22)
Page 3
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.

070.655-IOM (FEB 22)
Page 4
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.

070.655-IOM (FEB 22)
Page 5
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.