Frick RWB II Installation

MOTOR MOUNTING
The following procedure is required only when the motor is
mounted at the job site.
1. Thoroughly clean the motor feet and mounting pads of
grease, burrs, and other foreign matter to ensure firm seat-
ing of the motor.
2. Attach the motor to the base using the bolts and motor-
raising blocks, if required. Bolt snugly through the base.
3. Weld the four kick bolts into place so that they are posi-
tioned to allow movement of the motor feet.
4. Now that the motor has been set, check to see that the
shafts are properly spaced for the coupling being used. Refer
to the coupling data tables for the applicable dimension
(pages 5 and 6).
CHECKING MOTOR/COMPRESSOR ROTATION
Make sure coupling hubs are tight-
ened to the shaft before rotating the
motor to prevent them from flying
off and possibly causing serious injury or death.
COMPRESSOR ROTATION IS
CLOCKWISE WHEN FACING
THE END OF THE COMPRES-
SOR SHAFT. Under NO conditions
should the motor rotation be
checked with the coupling center
installed as damage to the com-
pressor may result. Bump the mo-
tor to check for correct compres-
sor rotation. After verification, install gear or disk drive spacer,
as applicable.
COMPRESSOR/MOTOR COUPLINGS
INSTALLATION
RWB II units are arranged for direct motor drive and require
a flexible drive coupling to connect the compressor to the
motor. Before installing, perform the following:
1. Inspect the shaft of the motor and compressor to ensure
that no nicks, grease, or foreign matter is present.
2. Inspect the bores in the coupling hubs to make sure that
they are free of burrs, dirt, and grit.
DBZ-B
COUPLING SPACING
SIZE in.
226 3 13 /
16
5
263 4 /
16
301 4 7 /
8
7
351 5 /
8
401 6 11 /
16
CH
COUP- BETWEEN SHAFT SPACING
LING MIN*
SIZE in. mm in.
13
8 3 / 96.8 4
16
5 7
9 4 / 109.5 5 /
16 16
5 3
10 4 / 109.5 6 /
16 8
7 7
11 4 / 123.8 5 /
8 8
* Required for shaft seal removal.
RWB II ROTARY SCREW COMPRESSOR UNITS
DBZ-B COUPLING DATA TABLE
HUB FACE
+/-
mm in. mm
96.8 1/64
109.5 1/32
123.8 1/32
149.2 1/32
169.9 1/32
CH COUPLING DATA TABLE
COUPLING HUB
SHAFT ENGAGEMENT
MAX MIN
mm in. mm in.
1 13
101.6 1 / 27.0 1
16
7 3
138.1 1 / 36.5 2 /
16
11 9
161.9 1 / 42.9 2 /
16
7
149.2 2 50.8 2 /
INSTALLATION
3. Check that the keys fit the hubs and shafts properly.
CH COUPLING – The T.B. Woods Elastomeric CH Coupling
is used in most applications up to 600 HP. It consists of two
drive hubs and a loose, gear-type Hytrel Drive Spacer. The
split hub is clamped to the shaft by tightening the clamp
screws. Torque is transmitted from the motor through the
elastomeric gear which floats freely between the hubs. In-
stall as follows:
1. Slide one hub onto each shaft as far as possible. It may
be necessary to use a screwdriver as a wedge in the slot to
open the bore before the hubs will slide on the shafts.
2. Hold the elastomeric gear between the hubs and slide
both hubs onto the gear to fully engage the mating teeth.
Center the gear and hub assembly so there is equal en-
gagement on both shafts. Adjust the space between hubs
as specified in the CH Coupling Data Table below.
3. Torque the clamping bolts in both hubs to the torque value
given in the CH Data Table. DO NOT USE ANY LUBRICANT
ON THESE BOLTS.
4. Proceed to Coupling Alignment.
DBZ-B COUPLING – The Thomas DBZ-B coupling is used
on applications above 600 HP and with sleeve bearing
motors that do not have axial end float constraint. The DBZ-B
coupling consists of two drive hubs and a flexible metal
disc drive spacer that is bolted to both hubs. A flexible steel
disc pack serves as the drive element. This disc pack is
bolted to the coupling hubs and prevents axial end float
between the compressor and motor shafts which may oc-
cur with sleeve bearing motors. On sleeve bearing motors,
the magnetic center must be determined and maintained
by securing the coupling to the motor shaft with the shaft
properly located.
If the motor is coupled to the compressor using a fixed-end-
play coupling, such as a DBZ-B coupling, and the motor is
not properly centered, additional thrust loads will be trans-
mitted to the compressor bearings that could result in pre-
mature bearing failure. Install as follows:
1. Remove the eight locknuts and long bolts attaching the
center member to the disc pack.
2. Slide the disc pack and coupling hub assemblies on their
respective shafts.
MAXIMUM TOTAL
INDICATOR READING
in.
.40 .003
.79 .004
.79 .004
.79 .004
.79 .004
MAX TOTAL
FACE INDICATOR
MAX SPACING READING
mm in. mm in.
1
/ 46.0 1 / 28.6 .004
16 8
7
61.9 1 / 36.5 .004
16 16
11
65.1 1 / 42.9 .004
16 16
7
73.0 1 / 47.6 .004
8 8
Injury may occur if loose clothing,
etc. becomes entangled on the spin-
ning motor shaft.
CLAMP BOLT
TORQUE (LUBE)
mm ft-lb Nm
.076 14 19.5
.102 22 30.6
.102 37 51.5
.102 55 76.5
.102 49 68.2
CLAMP BOLT
TORQUE (DRY)
SIZE
mm ft-lb Nm
3
.104 55 74.6 / - 24 UNF
8
3
.104 55 74.6 / - 24 UNF
8
1
.104 130 176.4 / - 20 UNF
2
1
.104 130 176.4 / - 20 UNF
2
S70-200 IOM
Page 5
SIZE
5 / - 24 UNRF
16
3
/ - 24 UNRF
8
7 / - 20 UNRF
16
1
/ - 20 UNRF
2
1 / - 20 UNRF
2
KEYWAY
SETSCREW
TORQUE
ft-lb Nm
13 17.6
13 17.6
13 17.6
13 17.6