Applications; Pumped Liquids; Sound Pressure Level; Preparations Before Installation - Grundfos sp series Installation And Operation Manual

4. Applications

Grundfos SP submersible pumps are designed for a wide range
of water supply and liquid transfer applications, such as the
supply of fresh water to private homes or waterworks, water
supply in horticulture and agriculture, drawdown of groundwater
and pressure boosting, and various industrial jobs.
The pump must be installed so that the suction interconnector is
completely submerged in the liquid. The pump can be installed
horizontally or vertically. See section

4.1 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 blockage.
When pumping liquids with a density higher than that
Caution
of water, motors with correspondingly higher outputs
must be used.
If liquids with a viscosity higher than that of water are to be
pumped, contact Grundfos.
The pump versions SP A N, SP A R, SP N, SP R and SPE are
designed for liquids with higher aggressiveness than drinking
water.
The maximum liquid temperature appears from section
temperatures/cooling.

4.2 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
The values apply to pumps submerged in water, without external
regulating valve.
Pump type
SP 1A
SP 2A
SP 3A
SP 5A
SP 7
SP 9
SP 11
SP 14
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.
5.2 Positional requirements.
5.4 Liquid
L [dB(A)]
pA
< 70
< 70
< 70
< 70
< 70
< 70
< 70
< 70
< 70
< 70
< 70
< 70
< 70
< 70
79
79
82

5. Preparations before installation

Warning
Before starting work on the product, switch off the
power supply. Make sure that the power supply
cannot be accidentally switched on.

5.1 Checking the motor liquid

The motors are factory-filled with a special non-poisonous liquid
which is frost-proof down to -20 °C.
Check the level of motor liquid and refill if required.
Note
Use clean water.
If frost protection is required, special Grundfos liquid
must be used to refill the motor. Otherwise clean
Caution
water may be used for refilling (however, never use
distilled water).
Refill liquid as described below.
5.1.1 Grundfos MS 4000 and MS 402 motors
The filling hole for motor liquid is placed in the following positions:
• MS 4000: in the top of the motor.
• MS 402: in the bottom of the motor.
1. Position the submersible pump as shown in fig. 2.
The filling screw must be at the highest point of the motor.
2. Remove the screw from the filling hole.
3. Inject liquid into the motor with the filling syringe until the
liquid runs back out of the filling hole. See fig. 2.
4. Replace the screw in the filling hole and tighten securely
before changing the position of the pump.
Torques
• MS 4000: 3.0 Nm.
• MS 402: 2.0 Nm.
The submersible pump is now ready for installation.
MS 4000
Motor position during filling - MS 4000 and MS 402
Fig. 2
MS 402
3