
HPS Rotary Screw Compressor Units
070.700-IOM (MAR 21)
Page 7
Installation
With the
hubs mount-
ed and the
axial spacing
set, proceed
to place
the spacer
between
the two hub
flanges. Take
care when
handling
the spacer.
Be sure the
spacer is fully supported at this time. Damage to the
unitized flex discs may result after they have been
installed if the spacer is not fully supported.
3. Install the
unitized flex disc. Start a bolt through a bolt
hole in the
spacer. Put the unitized flex disc between
the hub and spacer until a bushing hole in the unitized
flex disc lines up with the bolt. Slide the bolt through
the bushing hole in the unitized flex disc. To avoid
thread damage, ensure that every other bolt is installed
in the opposite direction as shown in the photo.
4. Install the
locknut until it is snug. Make sure that all
bolt threads are clean and lightly oiled. Do not torque
any locknuts at this time. Now pivot the unitized flex
disc until the other bushing holes in the flex disc are in
line with the bolt holes in the spacer. Install the rest of
the spacer bolts at this time. The remaining bolts for
this end of the coupling can be installed through the
hub bolt holes and flex disc bushing holes.
5.
Install the unitized flex disc in the other end of the
coupling. Ensure the unitized flex disc, when installed,
looks flat and parallel with the mating hub and spacer
flanges.
6. See
for torque values for the disc pack lock-
nuts. Hold the bolts in place while the locknuts are
torqued.
7.
Center the coupling between the shafts. Ensure that
the keys are fully engaged in their keyways.
8.
Tighten the motor and compressor shaft clamping bolts
evenly. See
for torque values.
9. See
for torque values for the keyway set-
screws.
Notice
Only after tightening the shaft clamping bolts to
their final torque can the keyway set screws be
tightened. If the keyway set screws are tightened
before the shaft clamping bolts are tightened, then
the hubs can be cocked on the shaft.
Notice
Do not use any lubricant on these bolts.
Holding charge and storage
Each HPS compressor unit is pressure and leak tested at
the factory and then thoroughly evacuated and charged
with
dry nitrogen to ensure the integrity of the unit during
shipping and short term storage before installation.
Caution
Take care when entering the unit to ensure that the
nitrogen charge is safely released.
Warning
Holding-charge shipping gauges on separator and
external oil cooler are rated for 30 psig (2.07 bar) and
are for checking the shipping charge only. They must
be removed before pressure testing the system and
before charging the system with refrigerant. Failure
to remove these gauges may result in catastrophic
failure of the gauge and uncontrolled release of re-
frigerant resulting in serious injury or death.
Keep units in a clean, dry location to prevent corrosion
damage. Reasonable consideration must be given to the
care for the solid-state components of the control panel.
Contact Frick service for long-term storage requirements.
Compressor unit oil
Warning
Do not mix oils of different brands, manufacturers, or
types. Mixing of oils may cause excessive oil foam-
ing, nuisance oil level cutouts, oil pressure loss, gas
or oil leakage and catastrophic compressor failure.
Notice
The Frick oil charge shipped with the unit is the best
suited lubricant for the conditions specified at the
time of purchase. If there is any doubt due to the re-
frigerant, operating pressures, or temperatures, refer
to Frick Oil publication
160.802-SPC
.
Oil charge
Notice
Oil may migrate from the wet sump area to the dry
coalescer area during transportation and handling.
Before commissioning the compressor, check for any
oil migration. Oil transfer may be needed.
Table 4: HPS models
HPS models
Compressor
model
Oil charge,
gal. (L)
HPS 36, 42, 60
HPSH 1510
35 (132.5)
Note:
Includes total in horizontal oil separator and piping.
Add 5 gal. for oil cooler.
Figure 6: Coupling bolt orientation