N–R463 en 04.05Page 8 of 26
Installation and commissioning
4. Installation and commissioning
A most careful mounting and alignment of the motors on an absolutely even surface is impera-
tive to avoid distortions when the screws are being tightened. For machines which are to be
coupled, attention must be paid to careful alignment. See Appendix 1 for alignment checking.
Couplings that are as elastic as possible should be used.
When using pulleys, gear wheels etc., ensure that the permitted radial and axial shaft loads are
not exeecced.
Motors with surface cooling (TEFC), hollow–fin cooling or tube cooling , internal
cooling or internal cooling with air–to–air heat exchanger
(for all specified types except Type ANXA–... and JNXA–...)
The maximum permissible coolant temperature (ambient temperature at installation site) acc. to
EN 60034–1/IEC 60034–1 is 40°C (104°F) and a permissible altitude up to 1000 m above mean
sea level (other values see rating plate).
Care must be taken that the cooling air can flow unhindered into the air inlet openings and freely
pass through the air outlet openings and cannot be directly sucked in again. Suction and outlet
openings must be protected from obstructions and coarse dust.
The motors with water jacket cooling (Type ANXA–355..–.. to ANXA–560..–..)
Before commissioning the water–cooled motors, the trouble–free working of the cooling–water cir-
cuit must be ensured. It must be ensured that the motor will only be switched on when the cooling–
water circuit is in operation. The circuit must be kept in operation until the motor comes to standstill
after it is switched off. The inlet and outlet openings are located on the motor housing.
The cooling water circuit is to be monitored. Normally, the motor is equipped with PTC thermistor
sensors, which switch of f the motor if the cooling–water circuit fails. If the housing is provided with
vent plugs for the water chamber, venting should be done for the first filling and thereafter at regular
intervals.
Only clean, non–aggressive cooling water must be used. The permissible content of suspended
solids is max. 10mg/l
The inlet temperature of the cooling water should be at least 20 °C (68 °F).
Temperatures below 20 °C (68 °F) result in higher formation of condensation water and motor fail-
ure. The permissible inlet and outlet temperature, maximum pressure and the required amount of
cooling water are indicated on the motor plates.
If the motors are only allowed to operate at a coolant temperature below 0 °C (32 °F) then, because
of the reduced cooling action owing to the addition of antifreeze consultation with the motor manu-
facturer is necessary.
The motors with mounted–on air–water heat exchanger for the Type JNXA–..
Before commissioning the motors, the trouble-free working of the cooling–water circuit must be
ensured. It must also be ensured that the motor will only get switched on if the cooling–water circuit
is in operation. The cooling water circuit must be kept working until the motor comes to standstill
after it has been switched off.
The permissible inlet and outlet temperature, maximum pressure and the required amount of cool-
ing water are indicated on the motor plates.