RWB II ROTARY SCREW COMPRESSOR UNITS
INSTALLATION
S70-200 IOM
Page 9
HOT ALIGNMENT OF COMPRESSOR/MOTOR
Hot alignments can only be made after the unit has oper-
ated for several hours and all components are at operating
temperatures.
Shut down the unit and quickly affix dial indicator to coupling
motor hub, then take readings of both the face and rim of the
compressor hub. If these readings are within tolerance, record
reading, attach coupling guard and restart unit. However, if
the reading is not within limits, compare the hot reading with
the cold alignment and adjust for this difference; i.e. if the rim
at 0° and 180° readings indicates that the motor rises .005"
between its hot and cold state, .005" of shims should be re-
moved from under the motor.
After the initial hot alignment adjustment is made, restart unit
and bring to operating temperature. Shut down and recheck
hot alignment. Repeat procedure unit hot alignment is within
specified tolerance.
INSTALL COUPLING GUARD BE-
FORE OPERATING COMPRESSOR.
OIL PUMP COUPLING
Compressor units with direct motor/pump coupled pumps
need no pump/motor coupling alignment since this is main-
tained by the close-coupled arrangement.
HOLDING CHARGE AND STORAGE
Each RWB II compressor unit is pressure and leak tested at
the Frick factory and then thoroughly evacuated and charged
with dry nitrogen to ensure the integrity of the unit during
shipping and short term storage prior to installation.
NOTE: Care must be taken when entering the unit to en-
sure that the nitrogen charge is safely released.
Holding charge shipping gauges
on separator and external oil cooler
are rated for 30 PSIG and are for
checking the shipping charge only. They must be re-
moved 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 refrigerant resulting
in serious injury or death.
All units must be kept in a clean, dry location to prevent cor-
rosion damage. Reasonable consideration must be given to
proper care for the solid-state components of the micropro-
cessor.
Unit which will be stored for more than two months must have
the nitrogen charge checked periodically.
COMPRESSOR UNIT OIL
DO NOT MIX OILS of different
brands, manufacturers, or types.
Mixing of oils may cause excessive
oil foaming, nuisance oil level cutouts, oil pressure loss,
gas or oil leakage and catastrophic compressor failure.
Use of oils other than Frick Oil in
Frick compressors must be ap-
proved in writing by Frick engineer-
ing or warranty claim may be denied.
Use of filter elements other than
Frick must be approved in writing
by Frick engineering or warranty
claim may be denied.
The oil charge shipped with the unit is the best suited lubri-
cant for the conditions specified at the time of purchase. If
there is any doubt due to the refrigerant, operating pressures,
or temperatures, refer to Frick Pub. E160-802 SPC for guid-
ance.
OIL CHARGE
The normal charging level is midway
in the top sight glass located mid-
way along the oil separator shell.
Normal operating level is midway
between the top sight glass and bot-
tom sight glass. The table gives the
approximate oil charge quantity.
* Includes total in oil separator and
piping. Additional oil supplied for oil
cooler.
Add oil by attaching the end of a
suitable-pressure-type hose to the
oil charging valve, located on the top
of the oil separator at the compres-
sor end. Using a pressure-type pump and the recommended
Frick oil, open the charging valve and pump oil into the sepa-
rator. NOTE: Fill slowly because oil will fill up in the sepa-
rator faster than it shows in the sight glass.
Oil distillers and similar equipment which act to trap oil must
be filled prior to unit operation to normal design outlet levels.
The same pump used to charge the unit may be used for
filling these auxiliary oil reservoirs.
NOTE: The sight glass located in the coalescing end of
the separator near the discharge connection should re-
main empty.
OIL HEATER(S)
Standard units are equipped with two or three 500 watt oil
heaters, providing sufficient heat to maintain the oil tempera-
ture for most indoor applications during shutdown cycles to
permit safe start-up. Should additional heating capacity be
required because of low ambient temperature, contact Frick.
The heaters are energized only when the unit is not in op-
eration.
DO NOT ENERGIZE THE HEATERS when there is no oil
in the unit, the heaters will burn out.
The oil heaters will be energized
whenever 120 volt control power is
applied to the unit and the compressor is not running,
unless the 16 amp circuit breaker in the micro enclosure
is turned off.
60
35
76
35
100
65
134
65
177
110
222
110
270
140
316
140
399
140
480
170
BASIC*
CHARGE
(gal.)
RWB II
MODEL
NO.
