GRUNDFOS SCALA2 Smart Water Boosting Pump Instructions

Usage Tips:
Ensure the pump is primed properly before initial use. Monitor for any leaks in the inlet hose or pipes. Regular maintenance and cleaning are recommended to ensure optimal performance.

Frequently Asked Questions (FAQ):

Q: What should I do if the pump does not start?
A: Check the power supply and ensure the pump is correctly plugged in. Verify that the pump is primed and there are no blockages in the system.

Q: How often should I perform maintenance on the SCALA2 pump?
A: Regular maintenance is recommended as per the user manual guidelines. Typically, check for leaks, clean filters, and inspect the overall condition of the pump periodically.

Original installation and operating instructions
These installation and operating instructions describe Grundfos SCALA domestic water supply pumps.
Sections 1-4 give the information necessary yo be able to unpack, install and start up the product in a safe way.
Sections 5-14 give important information about the product, as well as information on service, fault finding and disposal of the product.

Warning
Prior to installation, read this document and the quick guide. Installation and operation must comply with local regulations and accepted codes of good practice.

Warning
This product can be used by children of eight years and up and persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge if they are under supervision or have been instructed in the safe use of the product and understand the hazards involved.
Children must not play with the product.
Cleaning and maintenance of the product must not be made by children without supervision.

Caution
This pump has been evaluated for use with water only.

Warning
Risk of electric shock.
This pump has a grounding conductor and grounding-type attachment plug. To reduce the risk of electric shock, be certain that the pump is connected only to a properly grounded,
grounding-type receptacle.

General information

Target group
These installation and operating instructions are intended for professional installers.

Symbols used in this document

Warning
If these safety instructions are not observed, it may result in personal injury.

Warning
If these instructions are not observed, it may lead to electric shock with consequent risk of serious personal injury or death.
If these safety instructions are not observed, it may result in malfunction or damage to the equipment.
Notes or instructions that make the job easier and ensure safe operation.

Receiving the product

Inspecting the product
Check that the product received is in accordance with the order. Check that the voltage and frequency of the product match voltage and frequency of the installation site. See section 6.4.1 Nameplate.

Scope of delivery

The box contains the following items:

1 Grundfos SCALA pump
1 quick guide
1 safety instructions booklet.

Installing the product

Location
The pump can be installed indoors or outdoors, but it must not be exposed to frost.
We recommend that you install the pump near a drain or in a drip tray connected to a drain in order to lead away possible condensation from cold surfaces.

Minimum space
The pump requires a minimum space of 430 x 215 x 325 mm (17 x 8.5 x 12.8 inches).
Even though the pump does not require much space, we recommend that you leave enough space for service and maintenance access.

Installing the product in frosty environment
Protect the pump from freezing if it is to be installed outdoors where frost may occur.

System sizing

Warning
The system in which the pump is incorporated must be designed for the maximum pump pressure. The pump is factory-set to three bar outlet pressure which can be adjusted according to the system in which it is incorporated. The tank precharge pressure is 1.25 bar (18 psi).
In case of suction lift of more than six metres, the pipe resistance on the outlet side must be at least two metres water column or 3 PSI at any given flow in order to obtain optimum operation.

Mechanical installation

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

Foundation
Fasten the pump to a solid horizontal foundation by means of screws through the holes in the base plate. See figures 2 and 1.

A 130 mm 5.12 inches
B 181 mm 7.13 inches

C 144 mm 5.67 inches

Pipework
Make sure that the pump is not stressed by the pipework.
The pumps are equipped with flexible connections, ± 5 °, to facilitate the connection of inlet and outlet pipes. The inlet and outlet ports can be loosened by turning the union nuts by hand.
Always loosen and tighten inlet and outlet union nuts by hand.

Carefully screw the inlet and outlet connections on to the inlet and outlet ports using a pipe wrench or similar tool.

Then fit the connections to the inlet and outlet holding the connections with one hand, and tightening the union nuts with the other hand. See fig. 3.

How to reduce noise in the installation
Vibrations from the pump may be transferred to the surrounding structure and create noise in the 20-1000 Hz spectrum, also called the bass spectrum. Correct installation using a vibration-damping rubber pad, flexible hoses and correctly placed pipe hangers for rigid pipes can reduce the noise experienced by up to 50 %. See fig. 4. Place pipe hangers for the rigid pipes close to the connection of the flexible hose.

Installation examples
Fittings, hoses and valves are not supplied with the pump. 3.5.1 Mains water pressure boosting

Suction from a well

Suction from freshwater tank

Suction pipe length
The overview below shows the different possible pipe lengths, depending on the vertical pipe length.
The overview is only intended as a guide.

Preconditions:

Maximum flow velocity: 1 l/s (16 gpm)

Inside roughness of pipes: 0.01 mm (0.0004 inch).

Electrical connection

Plug connection

Warning
Check that the voltage and frequency of the product match voltage and frequency of the installation site.

Warning
If the power supply cable is damaged, it must be replaced by the manufacturer, his service agent or similarly qualified persons in order to avoid hazard.

Warning
As a precaution, the product must be connected to a socket with earth connection.

We recommend that you fit the permanent installation with an earth leakage circuit breaker (ELCB) with a tripping current < 30 mA.
The pump incorporates current and temperature dependent motor protection.

Connections without plug

Warning
The electrical connection must be carried out by an authorized electrician in accordance with local regulations.

Warning
Before making any connections in the product, make sure that the power supply has been switched off and that it cannot be accidentally switched on.
The product must be connected to an external mains switch with a contact gap of at least 3 mm (0.12 inch) in all poles.

Starting up the product

Do not start the pump until it has been filled with liquid.

Priming the pump

Unscrew the priming plug and pour minimum 1.7 litres (0.45 gallons) of water into the pump housing. See fig. 9.
Screw the priming plug on again.

If the suction depth exceeds 6 m (20 ft), it may be necessary to prime the pump more than once.
Always tighten priming and drain plugs by hand.

Starting the pump

Open a tap to prepare the pump for venting.

Insert the power plug into the socket or turn on the power supply and the pump will start.
When water flows without air, close the tap.
Open the highest tapping point in the installation, preferably a shower.

Adjust the pressure to the required pressure by means of the buttons.
Close the tapping point. Startup has been completed.

Fig. 9 Priming the pump

Shaft seal run-in
The shaft-seal faces are lubricated by the pumped liquid, meaning that there may be a certain amount of leakage from the shaft seal. When the pump is started up for the first time, or when the shaft seal has been replaced, a certain run-in period is required before the leakage is reduced to an acceptable level. The time required for this depends on the operating conditions, that is, every time the operating conditions change, a new run-in period will be started. Under normal conditions, the leaking liquid will evaporate. As a result, no leakage will be detected.

Storing and handling the product

Handling
Take care not to drop the pump as it may break.

Storing
In case the pump is to be stored for a period of time, drain it and store it in a dry location.
Temperature range during storing must be -40 to 70 °C (104 to 158 °F).

Winterizing
If the pump is going to be out of operation during the winter and can be exposed to frost, it must be disconnected from the power supply and winterized.

Proceed as follows:

Stop the pump by means of the on/off button .
Disconnect the power supply.
Open a tap to release the pressure in the pipe system.

Close the isolating valves and/or drain the pipes.
Gradually loosen the priming plug to release the pressure in the pump.
Remove the drain plug to drain the pump. See fig. 10.

Startup after the winter
Check that the pump is not blocked by following the steps in section 9.1 Deblocking the pump.
See section 4. Starting up the product.

Product introduction

Product description

Application
The pump is suitable for pressure boosting of fresh water in domestic water supply systems.

Pumped liquids
The pump is designed for clean fresh water and chlorinated water < 300 ppm.

Identification

Nameplate

Type key

Control functions

Menu overview, SCALA2

Pressure indicator, SCALA2
The pressure indicator shows the required outlet pressure from 1.5 to 5.5 bars (22 to 80 psi) in 0.5 bar (7.5 psi) intervals. The illustration below shows a pump set to 3 bar (44 psi) indicated by two green lights and a pump set to 3.5 bar (51 psi) indicated by one green light.

The pressure settings 4.5, 5.0 and 5.5 bar (65, 73 and 80 psi) require a minimum positive inlet pressure which is maximum 4 bar (58 psi) lower than the required outlet pressure.
Example: If the required outlet pressure is 5 bar, the minimum inlet pressure must be 1 bar (14.5 psi).

Indicator lights, SCALA2

* For fault number 4, dry-running, the pump must be reset manually. For fault number 4, water shortage, and the remaining faults, 1, 2, 3, 5, 6 and 7, the pump will reset whenever the cause has disappeared or been remedied. See section 8.3.2 Auto reset.
For further information about system status, see section 12.1 Grundfos Eye operating indications.

Operating the controller

Setting the outlet pressure
Adjust the outlet pressure by pressing .

Locking and unlocking the operating panel
The operating panel can be locked, which means that the buttons do not function and no settings can be changed accidentally.

How to lock the operating panel

Hold down the buttons simultaneously for three seconds.
The operating panel is locked when symbol lights up.

How to unlock the operating panel

Hold down the buttons simultaneously for three seconds.
The operating panel is unlocked when symbol turns off.

Expert settings, SCALA2
Expert settings are for installers only.
The expert setting menu allows the installer to toggle between the functions “Auto reset”, “Anti cycling” and “Maximum continuous operating time”.

Accessing the expert settings

Proceed as follows:

Hold down the button for five seconds.

The symbol will start flashing to indicate that the expert settings are active.

The pressure indicator now acts as the expert “menu”. A flashing green diode is the cursor. Move the cursor using the buttons, and toggle the selection on or off using the button. The diode for each setting will light up when the setting is active.

Auto reset
The factory setting for “Auto reset” is “on”.

On:
This function allows the pump to automatically check if the operating conditions are back to normal. If the operating conditions are back to normal, the alarm indication will be reset automatically.

The “Auto reset” function works in the following way:

For indications, see section 7.1.2 Indicator lights, SCALA2.

Off:
All alarms must be reset manually by means of the button.

Anti cycling
The factory setting for “Anti cycling” is “off”.
This function monitors the stops and starts of the pump.

Off:
If the pump starts 40 times in a fixed pattern, there will be an alarm. The pump will remain in operation as normal.

On:
If the pump starts and stops in a fixed pattern, there is a leakage in the system, and the pump will stop and show alarm 3.
Leakage in the system.

Maximum continuous operating time
The factory setting for “Maximum continuous operating time” is “off”.
This function is a timer that can turn off the pump if it runs continuously for 30 minutes.

Off:
If the pump exceeds the running time of 30 minutes, the pump will run depending on the flow.

On:
If the pump exceeds the running time of 30 minutes, the pump will stop after 30 minutes of continuous operation, and it will show alarm 6. This alarm will always need to be reset manually.
Maximum runtime exceeded.

Resetting to factory settings
The pump can be reset to factory setting by pressing the buttons simultaneously for five seconds.

Starting up the product after shutdown or standstill

Deblocking the pump

Warning
Before starting any work on the product, make sure that the power supply has been switched off and that it cannot be accidentally switched on.
The end cover incorporates a plug which can be removed by means of a suitable tool. This makes it possible to deblock the pump shaft if it has seized up as a result of inactivity.

Controller settings
The pump will remember the controller settings even if it is turned off.

Priming
If the pump has been drained, it must be filled with liquid before startup. See section 4. Starting up the product.

Servicing the product

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

Maintaining the product

Insect filter
The pump has an insect filter to prevent insects from nesting in the pump. The filter is placed on the bottom and can easily be removed and cleaned with a stiff brush. See fig. 18. Clean the insect filter once a year or as needed.

Inlet and outlet valves
The pump is maintenance-free, but we recommend that you check and clean the inlet and outlet non-return valves once a year or as needed.

To remove the inlet non-return valve, follow the steps below:

Turn off the power supply and disconnect the power plug.
Shut off the water source.
Open a tap to release the pressure in the pipe system.
Close the isolating valves and/or drain the pipes.
Gradually open and remove the priming plug. See fig. 19 (5).
Remove the drain plug and drain the pump. See fig. 19 (8).
Unscrew the union nut holding the inlet connection. See fig. 19 (7). Depending on the installation type, it may be necessary to remove the pipes from both the inlet and outlet connections.
Pull out the inlet connection.
Pull out the inlet non-return valve.
Clean the non-return valve with warm water and a soft brush.
Assemble the components in reverse order.

To remove the outlet non-return valve, follow the steps below:

Turn off the power supply and disconnect the power plug.
Shut off the water source.
Open a tap to release the pressure in the pipe system.
Close the isolating valves and/or drain the pipes.
Gradually open and remove the priming plug. See fig. 19 (5). The plug and non-return valve are one unit.
Clean the non-return valve with warm water and a soft brush.
Assemble the components in reverse order.

Customer service information
For further information on service parts, see Grundfos Product Center on www.product-selection.grundfos.com.

Service kits
For further information on service kits, see Grundfos Product Center on www.grundfos.com.

Taking out of operation
For further information on how to take the product out of operation, see end-of-life documentation on www.grundfos.com.

Fault finding the product

Grundfos Eye operating indications

Fault resetting

You can reset a fault indication in one of the following ways:

When you have eliminated the fault cause, reset the pump manually by pressing the button. The pump will then revert to normal duty.
If the fault disappears by itself, the pump will attempt to reset automatically and the fault indication will disappear if automatic reset is successful and provided that you have enabled “Auto reset” in the service menu.

Fault finding chart

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

Technical data

Operating conditions

Maximum ambient temperature:
1 x 208-230 V, 60 Hz: 45 °C (113 °F)
1 x 115 V, 60 Hz: 45 °C (113 °F)
1 x 200-240 V, 50/60 Hz: 55 °C (131 °F)
Maximum liquid temperature: 45 °C (113 °F)
Maximum system pressure: 10 bar, 1 MPa (145 psi)
Maximum inlet pressure: 6 bar, 0.6 MPa (87 psi)
Maximum head: 45 m (147 ft)
IP rating: X4D (outdoor installation)
Pumped liquid: Clean water
Noise level: < 47-53 dB(A)

Mechanical data
Pipe connections are R 1″ or NPT 1″.

Electrical data

Dimensions and weights

Disposal
This product has been designed with focus on the disposal and recycling of materials.

The following disposal values apply to all variants of Grundfos SCALA pumps:

Minimum 85 % for recycling
Maximum 10 % for incineration
Maximum 5 % for depositing.

Values are percent of total weight.
This product or parts of it must be disposed of in an environmentally sound way according to local regulations.
Subject to alterations.

Grundfos companies

United Kingdom
GRUNDFOS Pumps Ltd.
Grovebury Road
Leighton Buzzard/Beds. LU7 4TL

Phone: +44-1525-850000
Telefax: +44-1525-850011

Germany
GRUNDFOS GMBH
Schlüterstr. 33
40699 Erkrath

Tel.: +49-(0) 211 929 69-0
Telefax: +49-(0) 211 929 69-3799
e-mail: infoservice@grundfos.de

Service in Deutschland:

e-mail: kundendienst@grundfos.de
www.grundfos.com

Documents / Resources

GRUNDFOS SCALA2 Smart Water Boosting Pump [pdf] Instructions
93013252, SCALA2 Smart Water Boosting Pump, SCALA2, Smart Water Boosting Pump, Boosting Pump, Pump

References

User Manual

GRUNDFOS SCALA2 Smart Water Boosting Pump

Product Usage Instructions