Grundfos SCALA2 Service Instructions Manual
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Also See for SCALA2:
- User manual ,
- Installation and operating instructions manual (52 pages) ,
- Instructions manual (27 pages)
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Summary of Contents for Grundfos SCALA2
- Page 1 GRUNDFOS INSTRUCTIONS SCALA2 Service instructions...
- Page 3 SCALA2 English (GB) Service instructions ............... . 4 Dismantling the product .
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Page 4: Table Of Contents
SCALA2 sensor tool ......6 they understand the hazards involved. -
Page 5: Identification
2. Identification 2.2 Type key Example: SCALA2 3-45 A K C H D E 2.1 Nameplate Code Explanation Designation SCALA2 Type range Rated flow rate DK-8850 Bjerringbro Denmark XXXXXX X-XX XXXXXX Model A XXXXXXXX Max. head [m] XX/XXHz XXX-XXXV SN XXXXXXXX... -
Page 6: Scala2 Sensor Tool
3. SCALA2 sensor tool SCALA2 sensor tool The SCALA2 sensor tool is not sold by Grundfos. Users must 3D print the tool themselves. Find the 3D file here by searching for SCALA2. 4. Lubricants If nothing else is specified, all O-rings are to be lubricated with Rocol Sapphire Aqua-Sil. -
Page 7: Dismantling The Product
5. Dismantling the product • Disconnect the power supply to the motor. • Remove the power cable in accordance with local regulations. 5.1 Before disassembly • Open a tap to release the pressure in the pipe system. • Gradually loosen the non-return valve (65a) to release the DANGER pressure in the pump. -
Page 8: Removing The Control Box Cover
5.2 Removing the control box cover 5.3 Removing the printed circuit board (PCB) 1. Loosen the screws. Always use an antistatic service kit when handling electronic components. This will prevent static electricity from damaging components. 1. Remove the six pan-head torx screws in the cover (164a). 2. -
Page 9: Removing The Power Plug
4. Wipe off the cooling paste from the surfaces with a cloth and 5.5 Removing the cover remove the used cooling pad (166a). 166a 1. Slowly unscrew the non-return valve (65a) to release any pressure in the pump. 2. Remove the drain plug (7). 3. - Page 10 9. Remove the seal ring (44a). Removing the pressure tank Removing the connection part 10. Remove the self-priming valve (10) and O-ring (37). Self-priming valve and O-ring for connections part 11. Unscrew the pressure tank (42) counterclockwise and remove the gasket for the tank (42a).
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Page 11: Removing The Sensor And The Sensor Cable
5.6 Removing the sensor and the sensor cable 5.7 Removing the pressure tank 1. Remove the retaining clip (175) for the sensor. 1. Remove the screws (26) that hold the connection part. Note that one of the screws holds the earth connection bracket and 2. -
Page 12: Removing The Chamber Stack
5. Unscrew the pressure tank (42) counterclockwise and remove 5.8 Removing the chamber stack the gasket for the tank (42a). The position numbers in the following refer to the exploded drawing in the appendix Chamber stack and center part. 1. Remove the plug (169) on the nameplate to access the shaft end. -
Page 13: Removing The Shaft Seal
5.10 Removing the shaft seal 5.12 Removing the shaft from the center part 1. Remove the rotating shaft seal face (104). 1. Gently knock out the shaft (172) from the center part (55). 2. Remove the stationary seat (103) using a needle-noise pliers. 2. -
Page 14: Assembling The Product
3. Insert the sensor cable in the stator housing. Shaft seal complete 4. Push the flat end of the SCALA2 sensor tool with the palm of your hand to guide the sensor cable into place. 5. Remove the SCALA2 sensor tool. -
Page 15: Related Information
6.5.1 Fitting the chamber stack 6.5.2 Fitting the pressure tank 1. Fit the flat gasket (42a) and screw the pressure tank (42) on to The position numbers in the following refer to the exploded drawing the connection part (2) by hand. in the appendix Shaft seal and chamber stack. - Page 16 5. Cross-tighten the screws (1-4) to a torque of 0.5 Nm in the sequence shown in the drawing below. 8. Fit the sensor (174a) and fasten it by means of the retaining clip (175). Check that the rubber sensor pocket is seated correctly.
- Page 17 13. Fit the drain plug (7) and the non-return valve (65a). 6.5.3 Fitting the power plug 1. Fasten the cable grommet (1). Always tighten plastic nuts and plugs by hand to avoid 2. Place the earth wire and tighten the screw (903). breaking the material.
- Page 18 6.5.4 Mounting the printed circuit board (PCB) 1. Apply a new layer of cooling paste on the surfaces. 2. Mount the new cooling pad (166a). 166a 174a Mounting the printed circuit board (PCB) Applying cooling paste and cooling pad 3. Fasten the screws, starting with the modules (900). Observe the torque in the table below.
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Page 19: Corrosion
6.5.5 Fitting the control box cover 7. Corrosion In case of visible corrosion in the stator, the stator housing must be 1. Connect the plug for the operating plug and place the control replaced. box cover on the pump. See the acceptable and unacceptable levels of corrosion below. Acceptable level of corrosion Connecting the plug for the operating panel 1. -
Page 20: Megging
8. Megging 9. Winding resistance As the motor is star-connected, the easiest way to measure the CAUTION winding resistance is to measure across two stator windings. Electric shock Measure while the coil temperature is approximately 20 °C. It may Minor or moderate personal injury be necessary to let the motor cool off if it has been running, or if it ‐... -
Page 21: Shaft Seal Run-In
If the unlikely event of an internal leakage occurs, the liquid will be drained through the bottom of the pump. Install the pump in such a way that no undesirable collateral damage can arise. 11.1 Grundfos Eye operating indications Grundfos Eye Indication... -
Page 22: The Pump Is Not Running
Remedy turned off. Leakage from the pipe system, • Check and repair the pipe Contact Grundfos Service if or the external non-return valve system, or clean, repair the problem persists. is not properly closed due to or replace the external non- The shaft seal has seized up. -
Page 23: The Pump Is Running, And Indicator Light 7 Is On
11.10 The pump is running, and indicator light 7 is on 11.12 Insufficient pump performance, and indicator light 7 is on Grundfos Eye: Grundfos Eye: Two opposite green indicator lights are rotating. Two opposite green indicator lights are rotating. Indicator light 7 is on, indicating... -
Page 24: After A Reset, The Pump Runs Briefly, And Indicator Light 4 Is On
11.14 After a reset, the pump runs briefly, and indicator light 4 is on Grundfos Eye: Two opposite green indicator lights are rotating. Indicator light 4 is on, indicating dry running or water shortage. Cause Remedy Dry running or water shortage. -
Page 25: Exploded View
12. Exploded view 164a 111a 166a 100a 100b 173b 173a 173d 173c 174a Exploded view Pos. Description Center part Position number list Non-return valve, inlet Pos. Description Non-return valve, outlet Connection part Washer Chamber Locking nut Drain plug Seal cover Self-priming valve Union nut O-ring... -
Page 26: Document Quality Feedback
13. Document quality feedback Pos. Description To provide feedback about this document, scan the QR code using Ball bearing 6201.2Z.C4.SYN your phone’s camera or a QR code app. Ball bearing 6001.2Z.C4.SYN Waved washer D27.5/21 x 0.3 Mainboard cpl. Control box cover 164a Pan-head torx screw 166a... - Page 27 Dismantling the product 1. Chamber stack and center part 111a 166a Related information 5.8 Removing the chamber stack 5.9 Removing the chamber stack and center part...
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Page 28: Assembling The Product
Assembling the product 1. SCALA2 sensor cable 174a Related information 6.2 Installing the sensor cable... - Page 29 2. Shaft seal and chamber stack 111a 166a Related information 6.5 Fitting the shaft seal 6.5.1 Fitting the chamber stack...
- Page 30 Unit 1, Ground floor, Siu Wai industrial Turkey www.ba.grundfos.com Centre GRUNDFOS Pumps NZ Ltd. GRUNDFOS POMPA San. ve Tic. Ltd. Sti. E-mail: grundfos@bih.net.ba 29-33 Wing Hong Street & 68 King Lam 17 Beatrice Tinsley Crescent Gebze Organize Sanayi Bölgesi Street, Cheung Sha Wan...
- Page 31 98979478 12.2024 ECM: 1409271 www.grundfos.com...
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Questions and answers
Scale 2 2yr old leaking from the bottom?
The provided context does not specify a reason for the Grundfos SCALA2 leaking from the bottom after 2 years. However, potential causes could include improper pre-charge pressure maintenance, wear on seals or valves, or unnoticed damage. Regular maintenance, such as checking the pre-charge pressure and cleaning inlet and outlet valves, is recommended to prevent issues.
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i have a scala2. it is only 5 years old and has been leaking water out of the bottom of the pump for about 6 months. do you have a repair facility that services this pump?