Additional Installation, Operating and Maintenance Instructions (Translation)
English
Edition 07.2010 VEM-Ident-No. 73753 01en
4
Classification of shaft size to output
Size
Rated output [kW]
GR
EHL
GR
EHL
GR
EHL
GR
EHL
2-pole
4-pole
6-pole
8-pole
225 S
37
45
37
45
-
-
18,5
22
225 M
45
55
45
55
30
37
22
30
250 M
55
75
55
75
37
45
30
37
280 S
75
90
75
90
45
55
37
45
280 M
90
110
90
110
55
75
45
55
315 S
110
132
110
132
75
90
55
75
315 M
132
160
132
160
90
110
75
90
315 MX
160
200
160
200
110
132
90
110
315 MY
200
250
200
250
132
160
110
132
315 L
250
315
250
290
160
200
132
160
315 LX
315
355
315
355
200
240
160
200
355 M
355
400
355
400
250
315
200
250
355MX
400
500
400
500
315
400
250
315
355 L
500
560
500
560
400
450
315
355
GR… basic series, EHL… increased output
Water cooling
For water cooled motors the waste heat arising from the motor operation is dissipated by the cooling water.
The inlet and outlet for the cooling water is implemented at the non-driving end (N-end). The cooling water
must always contain a rust preventive agent, if the frost line could be crossed, also an anti-freeze or a com-
bined agent must be added.
The motors are intended for operation in closed cycle systems.
From size 315 upwards the operation in open cycle systems is available as a special version. If an open
cycle system shall be used, it is necessary to contact the manufacturer VEM motors GmbH.
Motor handling
If there is a possibility that the motors are stored or operated below the frost line, the freezing of the cooling
water inside the motor must be prevented. For that purpose the cooling water can be drained off or an anti-
freeze must be added to the cooling water, respectively before storage. The following different steps must be
observed:
Version 1
- continuous operation with anti-freeze
If the motor is operated continuously with an anti-freeze and anti-corrosion medium, e.g. HAERTOL Frostox
PSF 12/DI or a similar additive, then a continuous protection against corrosion and freezing is given.
Version 2
– interrupted duty and water as cooling medium
For interrupted motor operation, it is recommended to drain the cooling water off. Before the cooling water is
drained off, an anti-freeze, e.g. HAERTOL Frostox PSF 12/DI or similar products must be added for protec-
tion of the cooling system. By this procedure, the cooling jacket is protected against corrosion for about three
months.
Version 3
– after long-term standstill (with or without anti-freeze in the cooling system)
After long-term standstill and before putting into operation, it must be checked that there are no obstacles to
the free flow of cooling water. Possible traces of rust must be pickled off by a 10 % oxalic acid by the follow-
ing procedure:
Empty the cooling system, if there are any remains of water inside
Fill the cooling system by 10 % oxalic acid (about 100 g per litre) and leave it inside for about 15 min.
Empty the cooling system, rinse it with fresh water
– repeat this, if necessary
If the motor was in standstill for a long period, and if the water cooling system was empty during this time it
must be checked that the cooling water is able to circulate without any restrictions before putting into opera-
tion again.
