
English (GB) Service instructions
Original service instructions
Table of contents
1. General information ........................4
1.1 Hazard statements..........................4
1.2 Notes ..................................4
2. Safety information for working on the product .......4
3. Maintenance .............................5
4. Dismantling the product .....................6
4.1 Before dismantling the product ..................6
4.2 Removing the pump cover .....................6
4.3 Removingthe pressure switch ...................6
4.4 Removing the connection module housing ...........6
4.5 Removing the membrane......................6
4.6 Removing the chamber stack ...................7
4.7 Removing the shaft seal ......................7
4.8 Removing the control box cover..................8
4.9 Removing the printed circuit board cover inside the
control box...............................8
4.10 Removing the printed circuit board from the control box ...8
4.11 Replacing the printed circuit board ................8
4.12 Removing the capacitor from the control box ..........8
4.13 Removing the motor .........................9
4.14 Removing the motor stool and the flange ............9
5. Assembling the product .....................9
5.1 Fitting the motor stool and the flange...............9
5.2 Fitting the motor ...........................9
5.3 Fitting the shaft seal ........................10
5.4 Assembling the chamber stack .................10
5.5 Fitting the chamber stack .....................10
5.6 Connecting thecapacitor to the printed circuit board.....11
5.7 Fitting the printed circuit board..................11
5.8 Fitting the membrane .......................11
5.9 Fitting the cover for hydraulic ..................11
5.10 Fitting the pressure switch ....................11
5.11 Fitting the pump cover.......................11
6. Additional information .....................12
6.1 Lubricant ...............................12
6.2 Torques ...............................12
6.3 Nameplate for SCALA1 ......................12
6.4 Type key for SCALA1 .......................12
6.5 Fault finding the product .....................12
6.6 SCALA1 exploded view ......................13
1. General information
This appliance can be used by children aged from 8 years
and above and persons with reduced physical, sensory or
mental capabilities or lack of experience and knowledge if
they have been given supervision or instruction
concerning use of the appliance in a safe way and
understand the hazards involved.
Children shall not play with the appliance. Cleaning and
user maintenance shall not be made by children without
supervision.
Read this document before you install the product.
Installation and operation must comply with local
regulations and accepted codes of good practice.
1.1 Hazard statements
The symbols and hazard statements below may appear in Grundfos
installation and operating instructions, safety instructions and
service instructions.
DANGER
Indicates a hazardous situation which, if not avoided, will
result in death or serious personal injury.
WARNING
Indicates a hazardous situation which, if not avoided,
could result in death or serious personal injury.
CAUTION
Indicates a hazardous situation which, if not avoided,
could result in minor or moderate personal injury.
The hazard statements are structured in the following way:
SIGNAL WORD
Description of the hazard
Consequence of ignoring the warning
• Action to avoid the hazard.
1.2 Notes
The symbols and notes below may appear in Grundfos installation
and operating instructions, safety instructions and service
instructions.
Observe these instructions for explosion-proof products.
A blue or grey circle with a white graphical symbol
indicates that an action must be taken.
A red or grey circle with a diagonal bar, possibly with a
black graphical symbol, indicates that an action must not
be taken or must be stopped.
If these instructions are not observed, it may result in
malfunction or damage to the equipment.
Tips and advice that make the work easier.
2. Safety information for working on the product
DANGER
Explosion risk
Death or serious personal injury
‐Do not use the product for flammable liquids such as
diesel oil, petrol or similar liquids. The product must
only be used for water.
WARNING
Electric shock
Death or serious personal injury
‐Do not use the product for aggressive liquids. The
product must only be used for water.
WARNING
Toxic material
Death or serious personal injury
‐Do not use the product for toxic liquids. The product
must only be used for water.
WARNING
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 switched on accidentally.
WARNING
Electric shock
Death or serious personal injury
‐Mount the product horizontally to avoid condensation
in the electrical insulation inside the control box.
4
English (GB)