Operating manual for centrifugal pumps AT - TB… - MC… - TC… - TMA
24
Tab. 2
COUPLING
“Ø A” mm
GAP
“S” mm
PARALLEL
"X" mm
ANGULAR
"Y" mm
60 ÷ 80
2 to 2,5
0,10 0,20
100 ÷ 130
0,15
0,25
150 ÷ 260
3 to 3,5
0,30
290
4 to 5
0,30
330
5 to 7
11 - Install the coupling guard and its extension (if applicable) on the pump, secure the two locking bolts.
The gap between motor and guard should not be greater than 2 to 3 mm. (see fig. 23).
2 to 3 mm.
Fig. 23
8.4 - COUPLING PUMP SERIES
“TCHM”
AND
“TCTM”
These pumps do not require a coupling between the
pump and the motor shaft; they have been engineered
with a supporting flange and shaft having bore and
keyway ready to engage the motor shaft and key.
- Check the tolerances of pump shaft bore with its
keyway and motor shaft with key. The motor shaft
must engage the pump shaft perfectly without
interference. In the event there is interference, even
if minimal, it is required to rework the motor shaft
because a forced fitting would be detrimental to the
pump operation.
- Attach the electric motor to the pump flange making
sure that the two shafts line-up and the key engages
the keyway. Bolt the assembly with the supplied
fasteners and install the supporting foot if it applies
to the specific pump (see fig 23A).
9 - ELECTRICAL CONNECTIONS
DANGER!
Electric danger. Electrical connections must be made exclusively by qualified personnel in accordance with the
instructions from the manufacturer of the motor or other electrical components and must adhere to the local
National Electrical Code. Always ground the motor verifying it is properly wired. It is advisable to have an
electrical switch near the pump for emergency situations.
FOLLOW ALL SAFETY PRECAUTIONS AS LISTED IN CHAPTER 2.
BEFORE DOING ANY WORK TO THE INSTALLATION DISCONNECT ALL POWER SUPPLIES
All electric motors and possible connected accessories must be protected against overloading by means of
circuit breakers and/or fuses. Circuit breakers and fuses must be sized in accordance with the full load amperage
appearing on the motor nameplate.
It is recommended that motors over 4 kW be wired for Star-Delta start-up, to avoid electrical overloads to the
motor and mechanical overloads to the pump.
It is advisable to have an electrical switch near the pump for emergency situations.
Be sure to replace all safety guards before switching on the electrical power.
Prior to connecting the electrical wiring, turn the pump shaft by hand to make sure that it rotates freely. Connect the
electrical wiring in accordance with local electrical codes and be sure to ground the motor.
i
Fig. 23A
