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180R9263 / IOM APP 5.1-10.2 Appendices - v02 / 01.2013

Hoyer Motors, Motor Manual, October 2011

1. General

This manual concerns the following types of standard

induction motors from Hoyer:
HMA2, HMC2, HMD, HMT, MS, Y2E1, Y2E2, YDT
These motors are manufactured in accordance with IEC/EN
60034-4 and IEC/EN 60072.
Motors are rated for the ambient temperature range -20°C
to +40°C and site altitudes

≤

1000 m above sea level.

Low-voltage motors are components for installation in

machinery. They are CE marked according to the Low

Voltage Directive 2006/95/EC

2. Transport and storage

Check the motor for external damage immediately upon
receipt and, if found, inform the forwarding agent right
away. Check all rating plate data, and compare it with the
requirement of the motor.
Turn the shaft by hand to check free rotation, remove
transport locking if used.
Transport locking must be used again for internal transport
also. It is also important that transport locking is used when
motors are transported mounted on equipment.
All motors should be stored indoors, in dry, vibration- and
dust-free conditions.

Lifting eyebolts must be tightened before use. Damaged
eyebolts must not be used, check before use. Lifting eyes at
motor must not be used to lift the motor when it is attached
to other equipment.

Before commissioning, measure the insulation impedance.
If values are

≤

10M

at 25°C, the winding must be oven dried.

The insulation resistance reference is halved for each 20°C
rise in motor temperature.
It is recommended that shafts are rotated periodically by
hand to prevent grease migration.

3. Installation

The motor must be fixed on a stable, clear and flat founda-
tion. It must be sufficiently rigid to withstand possible short
circuit forces.
It is important to ensure that the mounting conditions do
not cause resonance with the rotational frequency and the
doubled supply frequency.
Only mount or remove drive components (pulley, coupling,
etc.) using suitable tools, never hit the drive components
with a hammer as this will cause damage to the bearing.
The motor are balancing with half key, ensure that the drive
components are also the same.

Correct alignment is essential to avoid bearing, vibration
and shaft failure.
Use appropriate methods for alignment.
Re-check the alignment after the final tightening of the
bolts or studs.
Check that drain holes and plugs face downwards. We
recommend opening the drain hole for motors placed

outdoors and not running 24 hours / day, so that the motor
can breathe, thus ensuring a dry motor.

4. Electrical connection

Work is only permitted to be carried out by qualified

specialists and must to be carried out in accordance with
local regulations.
Before work commences, ensure that all power is switched
off and cannot be switched on again. This also applies to the
auxiliary power circuits, e.g. anti-condense heaters.
Check that supply voltage and frequency are the same as
rated data.
Motors can be used with a supply deviation of ± 5% voltage
and ± 2% frequency, according to IEC60034-1

Connection diagrams for main supply and accessory as PTC
or heater are located inside the terminal box.

Connections must be made in such a way as to ensure that
a permanently safe electrical connection is maintained,
both for the main supply and the earth connection.
We recommend that crimped connections are made in
accordance with IEC 60352-2.

Tightening torques for terminal board screws:

Ensure that the terminal box is clean and dry.
Unused glands must be closed.
Check the terminal box gasket before it is remounted.

5. Maintenance

Inspect the motor at regular intervals, keep it clean and
ensure free ventilation air flow, check the condition of
shaft seals and replace if necessary. Both electrical and
mechanical connections must be checked and tightened if
necessary.

Thread

M10

M12

M16

M20

T.(Nm)

2.5

3.5

Motor Manual

Hoyer Motors, Motor Manual, October 2011

Bearing size and type are specified on the rating plate.
Motor types HMA2 and HMC2 is as standard with lifetime
greased bearing with motor size

≤

225.

Motor types MS and Y2E is as standard with lifetime greased
bearing with motor size

≤

160.

Typical duty hours for lifetime lubricated bearings.

Motors with a re-greasing system must be lubricated with
high quality lithium complex grease, NLGI grade 2 or 3, with
a temperature range of between -40°C to +150°C.

Motors are normal fitted with a data plate with greasing
information; if it is missing use the following re-greasing
intervals.

Grease the motor while running, open the grease outlet plug
and let the motor run 1-2 hours before the outlet grease
plug is closed again.

Grease the motor for the first time during commissioning.

The following applies in general for both lifetime lubricated
and re-lubricated bearings:
At 60Hz the time will be reduced by app. 20%.
Data for vertically mounted motors are half of the above
values.

The table values are based on an ambient temperature of
25°C. The values must be halved for every 15K increase in
bearing temperature.
Higher speed operations, e.g. frequency converter drive will
require shorter greasing intervals. Typically, doubling the
speed will reduce the values by 50%.

6. Special note for Atex Zone 22 motors.

Notice for the use of electrical equipment in areas with
combustible dust.
Designation of motor according to EC directive:
Ex II 3D T125°C, IP55.

The dust hazardous 3-phase asynchronous motors are

in accordance with European standard EN 50281-1-1.

Combustible dust areas will be found in agricultural areas
and in industrial environments.
Only one electrical installation may be installed in one
specified area (zone).

Only certificated cable glands for category 2D may be used.
Unused glands must be closed.
Connections must be made in such a way as to ensure that
a permanently safe electrical connection is maintained,
both for the main supply and earth connection.
Installations must be in accordance with actual standards
for installation in the Zone 22 area.

It is recommended that EN 50281-2 is followed according
temperature and dust on the motor surface.
The use of motors with so much surface dust that the
motor temperature increases is not permitted.
Regularly cleaning is recommended.
The radial shaft sealing ring is part of the ATEX certification.
It is important that the ring is always intact.
The shaft sealing must be regularly checked, and if dry
it must be lubricated. It is recommended that the seal is
re-lubricated regularly.
Always use the original seal ring when replaced.
Replacing bearings also means replacing the seals.

All machines must be inspected regularly for mechanical
damage.
The user is responsible for changing parts in accordance
with the lifetime of parts, in particular:
bearings, grease and lubrication of shaft sealing.

Maintenance, repairs and replacement on zone 22 motors
must only be carried out by qualified specialists.

Frame size

Poles

Typical lifetime

56 – 160

2 – 8

40.000h

180

35.000h

200

27.000h

225