Pumped Liquids; Sound Pressure Level; Preparation; Checking Of Liquid In Motor - Grundfos SP Instrucciones De Instalación Y Funcionamiento

3.2 Pumped liquids

Clean, thin, non-explosive liquids without solid particles or
fibres.
The maximum sand content of the water must not exceed
3
50 g/m . A larger sand content will reduce the life of the pump
and increase the risk of blocking.
When pumping liquids with a density higher than
that of water, motors with correspondingly higher
Caution
outputs must be used.
If liquids with a viscosity higher than that of water are to be
pumped, please contact Grundfos.
The special SP A N, SP A R, SP N, SP R and SPE types are
designed to accommodate liquids with higher aggressiveness
than drinking water.
The maximum liquid temperature appears from section 4.4 Liquid
temperatures/cooling.

3.3 Sound pressure level

The sound pressure level has been measured in accordance with
the rules laid down in the EC machinery directive 2006/42/EC.
Sound pressure level of pumps
Applies to pumps submerged in water, without external regulating
valve.
Pump type
SP 1A
SP 2A
SP 3A
SP 5A
SP 8A
SP 14A
SP 17
SP 30
SP 46
SP 60
SP 77
SP 95
SP 125
SP 160
SP 215
Sound pressure level of motors
The sound pressure level of Grundfos MS and MMS motors is
lower than 70 dB(A).
Other motor makes: See installation and operating instructions
for these motors.

4. Preparation

Warning
Before starting work on the pump, make sure that
the electricity supply has been switched off and
that it cannot be accidentally switched on.

4.1 Checking of liquid in motor

The submersible motors are factory-filled with a special non-
poisonous liquid, which is frost-proof down to –20 °C.
The level of the liquid in the motor must be
checked and the motor must be refilled, if
Note
required. Use clean water.
If frost protection is required, special Grundfos
liquid must be used to refill the motor. Otherwise
Caution
clean water may be used for refilling (however,
never use distilled water).
Refilling of liquid is carried out as described below.
4.1.1 Grundfos submersible motors MS 4000 and MS 402
The filling hole for motor liquid is placed in the following positions:
MS 4000: in the top of the motor.
MS 402:
1. Position the submersible pump as shown in fig. 2.
2. Remove the screw from the filling hole.
3. Inject liquid into the motor with the filling syringe, fig. 2, until
4. Replace the screw in the filling hole and tighten securely
Torques:
MS 4000: 3.0 Nm.
MS 402:
The submersible pump is now ready for installation.
L [dB(A)]
pA
< 70
< 70
< 70
< 70
< 70
< 70
< 70

4.1.2 Grundfos submersible motors MS6 and MS 6000

< 70
•
< 70
< 70
•
< 70
< 70
•
79
Filling procedure:
79
The filling hole for motor liquid is placed at the top of the motor.
82
1. Position the submersible pump as shown in fig. 3.
2. Remove the screw from the filling hole.
3. Inject liquid into the motor with the filling syringe, fig. 3, until
4. Replace the screw in the filling hole and tighten securely
Torque: 3.0 Nm.
The submersible pump is now ready for installation.
in the bottom of the motor.
The filling screw must be at the highest point of the motor.
the liquid runs back out of the filling hole.
before changing the position of the pump.
2.0 Nm.
MS 4000
Fig. 2 Pump position during filling – MS 4000 and MS 402
If the motor is delivered from stock, the liquid level must be
checked before the motor is fitted to the pump, see fig. 3.
On pumps delivered directly from Grundfos, the liquid level
has already been checked.
In the case of service, the liquid level must be checked, see
fig. 3.
The filling screw must be at the highest point of the motor.
the liquid runs back out of the filling hole.
before changing the position of the pump.
Fig. 3 Motor position during filling – MS6 and MS 6000
MS 402
45°
7