Electrical Connections; Start-Up; Repair; Temperature Sensor - Siemens 1PM6 Series Instructions Manual

4 Start-up

Thermal hazard from hot surfaces!
The surface temperatures of the motors may
exceed 80 o C (176
surfaces! Protection must be provided
against accidental contact if necessary.
Temperature-sensitive components (electric lines,
electronic components) must not
touch hot surfaces.
Checks before starting up
1. Turn the rotor by hand, the rotor must not grind.
2. Check the mounting of the motor and its alignment.
3. Check the direction of rotation in the uncoupled state.
4. Check the suitability and setting of the output elements for the
intended conditions of use.
5. Check the electrical connections: design, tightening torques
according to specification.
6. Check the PE conductor connection.
7. Check the functional condition of the auxiliary devices present.
8. Check the protection against accidental contact with moving
and live parts.
9. Check the functional condition and „on state" of the separate fan
set.
NOTE
The limit speed n (see rating plate) is the maximum
max
permissible peak operating speed. Higher speeds are not
permitted.
Perform additional checks if necessary.
If deviations from normal operation occur, e.g. increased
temperature, sound emission or vibrations, switch the motor off and
find the cause. Consult the manufacturer or SIEMENS service
center if necessary.
Do not disable the protective devices, even in trial operation.
The separate fan set must be in continual operation. Keep the air
inlets and outlets clear.
5

Repair

NOTE
Maintenance (replacement of the encoder or bearing) may only
be performed by the manufacturer or authorized SIEMENS
service centers.
5.1

Temperature sensor

D A N G E R
Electric shock hazard!
Observe all the instructions in section 3.3.
Switch off all additional and auxiliary circuits when
isolating.
Do not reverse these measures until the
maintenance has been completed and the motor has
been completely assembled.
If the temperature sensor fails, one can switch to the reserve
temperature sensor.
Switch over in the terminal box, paying attention to the wiring
diagram in the terminal box.
5.2 Disassembly, assembly of encoder
CAUTION
Damage to the encoder.
Encoder systems with integrated electronics and temperature
sensors are electrostatically endangered components.
Do not touch the connections with your hands or with tools
which could be electrostatically charged!
Siemens AG
CAUTION
o F). Do not touch hot
ENGLISH
Observe the following additional requirements:
- Ground the work place.
- Touch a conductive, grounded object before making contact.
An electrostatic charge must not be transferred on contact.
- Do not touch the plug pins directly.
- Use suitable packaging, e.g. corrugated cardboard boxes or
conductive plastic bags (not ordinary plastic bags or polystyrene).
Disassembly (Fig.2)
1. Unscrew the screws (6.92) and remove the cover (6.91) or
dismount the ventilation unit axially with the intermediate casing
(7.40). Remove the GAMMA ring (6.96) or in the case of L37
balancing disc. Mark the position!
2. Unscrew the screws (8.58) and remove the cover together with
seal or O-ring.
3. Mark the position of the encoder wheel (8.50) on the shaft.
4. Remove the encoder wheel with a suitable tool.
5. In the terminal box, remove the shrink tubing from the adapter
plug, disconnect the adapter plug from the encoder lead.
6. Disconnect the shielded lead of the encoder from the terminal
box pedestal
7. Unscrew the strain relief clamp from the non-drive end shield.
8. Unscrew the screws (8.53), remove the encoder (8.51) from the
slot, and pull the encoder lead through the non-drive
end shield.
Assembly (Fig.2)
Damage to the encoder and encoder wheel.
Assemble carefully. The encoder and wheel must not be
touching when assembled. Observe the operating instructions
for the encoder.
The gap between the encoder wheel (8.50) and encoder (8.51) is
set with a 0.2 mm feeler gage.
The gage and operating instructions are part of the scope of
delivery.
1. Slide the head of the encoder radially outwards in the non-drive
endshield until it meets the stop, tighten the screws (8.53) with a
torque of 2 Nm.
2. Attach the encoder lead to the non-drive end shield with a strain
relief clamp.
3. Connect the adapter plug of the encoder lead to the flange
connector in the terminal box.
4. Secure the plug connection with shrink tubing.
5. Lay a shielded lead from the encoder to the terminal box screw.
6. Heat the encoder wheel (8.50) to approx. 150
slide onto the shaft up to the stop. Set clearance!
7. Grease the O-ring before fitting. Secure the cover (8.56),
together with sealing ring or O-ring, with screws (8.58).
8. Slide on the GAMMA ring (6.96) up to the press on distance
(fig.2). The L37 has no lip seal.
9. Attach the cover (6.91) with screws (6.92) and spring ring
(6.93), or screw the ventilation unit on axially and screw on the
intermediate casing with screws (7.41 and 7.06). Shrink on the
balancing disc, maintain clearance (Fig. 2)!
5.3 Changing bearings, lubrication
Bearing replacement intervals
Bearing replacement intervals t
according to fig. 9.1.
It is recommended to replace the bearings at the drive and non-
drive ends after reaching the stated operating hours, or after
three years at the latest. The values t
- Horizontal fitting
- Maximum cooling air temperature +30°C (86
- Maximum bearing temperature +85°C (185
- Max. speed in continuous operation is 75% of the limit speed
n . Estimate the mean operating speed n
max.
varies.
CAUTION
0
C (302
for normal operating conditions
LW
apply to:
LW
0
F)
0
F)
if the motor speed
m
0
F) and
5