070.750-IOM2 (JAN 21)
Page 5
HPS 273 ROTARY SCREW COMPRESSOR
INSTALLATION - OPERATION - MAINTENANCE
Figure 3: Nameplate and Vi locations
Callout
Component
A
Nameplate
Long-term storage
Long-term storage (six months to five years) provi
-
sions are required, regardless of storage environment, if
start-up and useful operation does not occur within six
months of equipment shipment. Special provisions may
be required for storage of less than 6 months if the stor-
age area is subject to environments with high humidity,
large changes in temperature, dusty atmosphere, or other
unusual environmental conditions.
The standard Johnson Controls-Frick Warranty for an HPS
273 screw compressor covers 12 months from start-up
or 18 months from shipment, whichever comes first.
Make arrangements with the local Johnson Controls-Frick
service organization (arranged through factory service)
regarding surveillance and maintenance during the stor-
age 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 suggestion
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 kept flooded with oil. A warm and dry
environment is essential to minimize environmental and
corrosion damage.
Follow the steps in
Preparing the compressor for storage
and
Maintaining the compressor in storage
screw compressor warranty.
Preparing the compressor for storage
1. Evacuate the compressor to remove moisture.
2. Connect the evacuation lines to the three Schrader
access valves provided with the compressor. One valve
is connected to the compressor suction and the other
two valves are located at the block on the cylinder.
3. Break the vacuum with dry nitrogen and bring pressure
to 0 psig.
4. Pump oil into the SM1. Use break-in oil P/N
111Q0831809 for storage purposes. The amount of oil
necessary for HPS 273 compressors is 25 gal.
5. After the compressor is oil charged, pressurize the
compressor to 1.0 bar (14.5 psig) with nitrogen.
Maintaining the compressor in storage
1. Maintain the 0.3 bar to 1.0 bar (4.35 psig to 14.5 psig)
nitrogen charge, but ideally at 1.0 bar (14.5 psig).
2. Rotate the male rotor shaft monthly. Mark the shaft to
ensure the rotor does not return to the original posi-
tion.
3. Store the compressor inside a dry building environ-
ment.
4. Grease the male rotor shaft to prevent rust.
5. Record all information in a compressor long-term
storage log (see
Contact Johnson Controls-Frick Service with any questions
regarding long-term storage.
Description
HPS 273 compressor
The Frick HPS 273 rotary screw compressors use mating
asymmetrical profile helical rotors to provide a continuous
flow of vapor and are designed for high-pressure applica
-
tions. The compressor incorporates the following features:
• Designed for variable speed drive (VSD) with a range of
600 rpm to 4200 rpm, but can also be operated with a
fixed speed motor drive at 2950 rpm or 3550 rpm or a
fixed speed engine drive at 1200 rpm.
• The HPS 273 compressor models use stepless capacity
control providing infinite unloading capacity down to
about 20% of full-load capacity.
• The HPS 273 compressor models have a moveable slide
stop with three Vi ranges offered as standard:
–
2.2 to 5.0
–
1.7 to 3.0
–
1.3 to 1.96
• High capacity roller bearings to carry radial loads are
used at both inlet and outlet ends of the compressor.
• The high pressure compressor models use heavy duty
four-point ball bearings to carry the axial loads on the
rotor for the HPS 273 compressor models.
• The high-pressure compressor models use balance pis-
ton assemblies to limit the axial bearing loads. HPS 273
compressor models use one at the male and female
inlet ends that require pressure regulation on the oil
supply.
• The housings for the HPS 273 compressor models are
designed for 89 bar (1290 psig) working pressure.