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3.6 Electrical connection

Check that the supply voltage and frequency 
correspond to the values stated on the pump 
nameplate.
The electrical connection must be carried out by an 
authorised electrician in accordance with local 
regulations.

3.6.1 Thermal protection

The pump has a built-in thermal switch and requires 
no additional motor protection. If the pump is running 
without water, or if it is otherwise overloaded, the 
built-in thermal switch will cut out. When the motor 
has cooled to normal temperature, it will restart 
automatically.

3.6.2 Connecting to external controller

SB

SB pumps must be connected to an external 
controller. We recommend a Grundfos Pressure 
Manager: net.grundfos.com/qr/i/97506325

SBA

SBA pumps have an integrated control unit.

SB HF

SB HF pumps must be connected to an external 
controller. We recommend a Grundfos Pressure 
Manager: net.grundfos.com/qr/i/97506325

3.6.3 Power supply failure

In case of a power supply failure, the pump restarts 
automatically when power returns and runs for at 
least 10 s.

DANGER

Electric shock

Death or serious personal injury
- Switch off the power supply before you 

start any work on the product. Make 
sure that the power supply cannot be 
accidentally switched on.

- The pump must be earthed.

DANGER

Electric shock

Death or serious personal injury
- The protective earth of the socket outlet 

must be connected to the protective 
earth of the pump. The plug must 
therefore have the same PE connection 
system as that of the socket outlet. If 
not, use a suitable adapter.

We recommend that you fit the permanent 
installation with a residual-current circuit 
breaker, RCCB, with a tripping current less 
than 30 mA.

DANGER

Electric shock

Death or serious personal injury
- If the pump is used for cleaning or other 

maintenance of swimming pools, 
garden ponds or similar places, make 
sure that the pump is supplied through a 
residual-current circuit breaker, RCCB, 
with a tripping current of 30 mA.

DANGER

Electric shock

Death or serious personal injury
- Connect pumps that are delivered 

without cable and/or plugs to an 
external main switch with a minimum 
contact gap of 3 mm in all poles.

Make sure that there is at least 3 m free 
cable above the liquid level.

Summary of Contents for SB 3-25

Page 1: ...SB SBA Installation and operating instructions GRUNDFOS INSTRUCTIONS...

Page 2: ...iption 9 6 2 SB pumps 9 6 3 SB HF pumps 9 6 4 SBA pumps 9 6 5 SBA dry running protection 9 6 6 Intended use 9 6 7 Pumped liquids 9 6 8 Identification 10 7 Maintaining the product 10 8 Fault finding th...

Page 3: ...in the well or tank make sure that the well or tank does not contain sand or solid sediment Install the pipe so that the pump is not exposed to mechanical stress SIGNAL WORD Description of hazard Cons...

Page 4: ...en the floating inlet strainer and the wall If you install the pump in a well or tank the minimum free space must be as shown in figs 2 and 3 Pumps installed without a float switch require a space tha...

Page 5: ...e free cable length between the float switch and the lifting handle A reduced free cable length results in more starts and stops and a small difference in level The minimum free cable length is 10 18...

Page 6: ...let hose or pipe can be connected to the pump outlet port by means of an adapter You can also connect a pipe directly to the pump outlet SB and SBA pumps include an adapter Cut off the adapter so that...

Page 7: ...r returns and runs for at least 10 s DANGER Electric shock Death or serious personal injury Switch off the power supply before you start any work on the product Make sure that the power supply cannot...

Page 8: ...nd minimum flow rate values are shown in section 9 Technical data Automatic restart of SBA pumps SBA pump models with a float switch automatically restart when water is added Models without a float sw...

Page 9: ...n that automatically stops the pump in case of dry running The dry running protection functions differently during priming and operation 6 5 1 Dry running during priming If the control unit does not d...

Page 10: ...e C 9 Enclosure class 10 Manufacturer 11 Motor insulation class 12 Maximum head m 13 Country of origin 14 Approval marks 15 Waste electrical and electronic equipment 16 Maximum flow rate l min 17 Supp...

Page 11: ...appendix 3 Try to turn the pump shaft with a screwdriver 4 If the pump shaft is stuck follow the instructions in point 1 h Note Remember to refit the rubber plug e The pump or the power cable is defe...

Page 12: ...r is clogged Clean the inlet strainer f The pump is defective Repair or replace the pump g Leakage in the pipes Check and repair the pipes h The outlet pipe is defective Replace the outlet pipe i Unde...

Page 13: ...SB 3 35 35 SB 3 45 45 SBA 3 35 35 SBA 3 45 45 SB HF 5 55 50 Hz 55 SB HF 5 70 50 hz 70 SB HF 5 50 60 Hz 50 SB HF 5 65 60 Hz 65 Liquid temperature C SB 0 to 40 SBA 0 to 40 SB HF 0 to 40 Storage temperat...

Page 14: ...60 0 70 0 50 5 5 3 35 0 90 0 75 8 4 3 45 1 10 1 00 9 8 3 25 1 x 230 0 57 0 50 2 5 3 35 0 73 0 75 3 3 3 45 0 92 1 00 4 2 SBA Voltage V Frequency Hz P1 P2 I1 1 A kW hp 3 35 1 x 230 50 0 80 0 72 3 8 3 4...

Page 15: ...l on a product means that it must be disposed of separately from household waste When a product marked with this symbol reaches its end of life take it to a collection point designated by the local wa...

Page 16: ...Appendix 16 Appendix 1 SB pump Fig 1 SB pump TM04 6209 5109...

Page 17: ...Appendix 17 SBA pump Fig 2 SBA pump TM061258 2014...

Page 18: ...mp TM02 6643 4403 104 115 67 75 73a 50 84 66 5a 6 64 4 49 4 64 49 64c 105a 62 37 155 193 105 69a 69 20 182a 182 16 160 14 13 156a 37b 173 158 154 37c 48 47 172 152 153 151 37d 155a 193a 161 157 176a 1...

Page 19: ...19...

Page 20: ...1 51 E mail info_GDK grundfos com www grundfos com DK Estonia GRUNDFOS Pumps Eesti O Peterburi tee 92G 11415 Tallinn Tel 372 606 1690 Fax 372 606 1691 Finland OY GRUNDFOS Pumput AB Trukkikuja 1 FI 013...

Page 21: ...21 2 5020 1426 sk grundfos com Slovenia GRUNDFOS LJUBLJANA d o o Lesko kova 9e 1122 Ljubljana Phone 386 0 1 568 06 10 Telefax 386 0 1 568 06 19 E mail tehnika si grundfos com South Africa GRUNDFOS PTY...

Page 22: ...7358 0618 ECM 1227326 The name Grundfos the Grundfos logo and be think innovate are registered trademarks owned by Grundfos Holding A S or Grundfos A S Denmark All rights reserved worldwide Copyright...

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