Grundfos SCALA1 User manual

SCALA1 System
Installation and operating instructions
GRUNDFOS INSTRUCTIONS

SCALA1 System
English (GB)
Installation and operating instructions ..................................4
3
Table of contents

English (GB) Installation and operating instructions
Original installation and operating instructions
Table of contents
1. General information ............. 5
1.1 Hazard statements .............. 5
1.2 Notes ..................... 5
1.3 Target group.................. 5
2. Product introduction ............ 6
2.1 Product description .............. 6
2.2 Pumped liquids ................ 6
3. Mechanical installation ........... 6
3.1 Wall installation ................ 7
3.2 Installing the overflow connection ...... 8
3.3 Connecting the tap water pipe ........ 9
3.4 Connecting the rainwater inlet pipe ..... 9
3.5 Connecting the outlet pipe ..........10
3.6 Installing the float switch ...........10
4. Starting up the product ...........12
4.1 Priming the product ..............12
4.2 Starting up the pump .............12
4.3 Operation ...................13
4.4 Shaft seal run-in................13
5. Control functions ..............13
5.1 Overflow alarm ................13
5.2 Operating panel ................14
5.3 Auto reset ...................15
5.4 Dry-running protection ............16
5.5 Anti-cycling ..................16
5.6 Maximum runtime ...............16
5.7 Performance modes .............17
5.8 Selecting the performance mode.......18
6. Fault finding .................18
6.1 Grundfos Eye SCALA1 ............19
6.2 The pump does not start ...........20
6.3 The pump does not start ...........20
6.4 The pump is not running, and the
indicator light for dry running and water
shortage is on .................20
6.5 The pump starts and stops too frequently ..21
6.6 The pump does not stop ...........21
6.7 Insufficient pump performance ........21
6.8 The pump is not running ...........22
6.9 The pump is not running, and the
indicator light for exceeded maximum
runtime is on .................22
6.10 The pump is not running, and the
indicator light for leakage in the system is
on .......................22
6.11 The pump is not running and Grundfos
Eye is flashing red ..............23
6.12 The pump is running and the motor
shows a red indicator light ..........23
6.13 The pump cuts out during operation .....24
6.14 Electric shock .................24
6.15 Resetting fault indications ..........24
7. Maintenance .................25
7.1 Cleaning the filter ...............25
8. Technical data ................26
8.1 Operating conditions .............26
8.2 Mechanical data................27
8.3 Electrical data .................27
8.4 Dimensions and weights ...........27
9. Disposing of the product ..........28
9.1 Disposing of hazardous or toxic materials ..28
10. Document quality feedback ........28
4
English (GB)

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.
1.3 Target group
These installation and operating instructions are
intended for professional as well as non-professional
users.
5
English (GB)

2. Product introduction
2.1 Product description
The SCALA1 System is used to manage and
distribute rain. The system is suitable for irrigation,
water flushing of toilets and floor cleaning systems.
The system prioritises the use of rainwater over tap
water. In case of insufficient rainwater in the tank, the
control unit switches to tap water to ensure the
necessary water flow at the tapping points. The
system automatically switches between the rainwater
tank and the tap water tank by means of a three-way
valve installed on the pump inlet port. The water
supplied by the system is not potable.
2.2 Pumped liquids
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.
If the water contains sand, gravel or other
debris, there is a risk of pump blockage
and pump damage. Install a filter on the
inlet side or apply a floating strainer to
protect the pump.
The product is suitable for pumping clean, thin, non-
aggressive and non-explosive liquids without solid
particles or fibres.
The product is designed for fresh water with a
maximum chloride content of 300 ppm and a free
chlorine content below 1 ppm.
Examples of liquids:
• clean water
• rainwater.
3. Mechanical installation
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.
WARNING
Chemical hazard
Death or serious personal injury
‐Before the pump is used for supplying
drinking water, flush the pump
thoroughly with clean water.
WARNING
Biological hazard
Death or serious personal injury
‐Before the pump is used for supplying
drinking water, flush the pump
thoroughly with clean water.
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English (GB)

3.1 Wall installation
1
2
3 4
5
6
79 8
10
11
TM085710
Pos. Description
1 Three-way valve
2 SCALA1 System
3 Filter
4 Feed pump (optional)
5 Rainwater tank
6 Inlet filter/float switch
7 Inlet pipe
8 Tank overflow
9 Sewer line
10 Mains water supply
11 Control box
Before installing the product, ensure that the sewage
system is at least 1 metre below where SCALA1
System is to be installed. The following requirements
must also be met:
• The room must have an outlet pipe that is
connected to the sewage system.
• The location must be dry and protected from rain.
• Flat wall, in horizontal position.
• Minimum distance from the ceiling: 50 cm.
We recommend installing a feed pump
with a maximum system pressure of 8 bar
if the distance between the rainwater tank
and SCALA1 System is too long.
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English (GB)

3.1.1 Mounting the product
The security screws are essential to
ensure the stability of the system and the
safety of persons.
12
TM085550
SCALA1 system
Pos. Description
1 Mounting screws for the bracket
2 Security screws
Follow the steps below to mount the SCALA1 system:
1. Install the mounting bracket on the wall.
Make sure it is horizontal using a spirit level, and
mark the positions of the holes.
2. Drill the mounting holes using a D.10 drill bit.
3. Fix the bracket to the wall, making sure that it is
level and securely attached to the wall.
4. Install the SCALA1 system as shown above.
5. Mount the security screws.
6. Place two of the supplied vibration dampers
between the bracket and the wall, and place the
remaining two between the tank and the wall to
reduce the transfer of vibrations to the wall.
3.2 Installing the overflow connection
To install the overflow connection, follow the steps
below:
1. Connect the DN 50 outlet pipe to the overflow
pipe of the system.
2. Make sure that the outlet pipe
slopes sufficiently to guarantee correct drainage.
3. Connect the outlet pipe to the sewage system.
4. If the outlet pipe does not slope sufficiently, install
a pump system.
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English (GB)

3.3 Connecting the tap water pipe
When tightening the pipe, make sure the
tap water hose does not turn.
The float switch that regulates the
backflow of the tap water is designed to
operate at a maximum pressure of 4 bar
and a flow rate of more than 10 L/min. If
the mains water pressure exceeds this
value, install a pressure regulator
upstream of the float and add a mesh filter
to protect the pressure regulator from any
debris that could compromise its
operation. Excessive pressure in the pipes
of the tap water network can lead to a leak
or a malfunctioning float switch.
We recommend installing an on/off tap
upstream of the float switch to cut off the
mains water supply in case of breakage or
malfunction so that maintenance can be
carried out safely.
1. Connect the tap water pipe to the 3/4 inch drain
on the right side of the tank.
3.4 Connecting the rainwater inlet pipe
The inlet pipe must have an internal diameter of at
least 25 mm, and it must always slope towards the
tank.
We recommend installing a float switch
fitted with an inlet strainer and a non-return
valve in the rainwater tank.
1. Install the system as close to the rainwater tank
as possible.
a. Never exceed a suction lift of 6 metres for
optimum performance of the pump. The total of
the suction distance and the suction loss
depends on the length of the inlet pipe.
b. The inlet point must always ensure the suction
of clean water. Use a suction kit, and install it
as shown here.
TM079196
Installation of the suction kit
2. Connect the inlet pipe to the connecting piece.
3. Install a feed pump if the maximum pipe length
according to the suction lift is outside the curve.
See the graph below.
9
English (GB)

0
1
2
3
4
5
6
7
8
9
[m]
[m]
4 8 12 16 20 24 28 32 36 40
TM079195
Maximum inlet pipe length (horizontal axis)
according to the suction lift (vertical axis)
3.5 Connecting the outlet pipe
Install an on/off tap upstream of the
float switch to cut off the mains water
supply in case of breakage or
malfunction so that maintenance can be
carried out safely.
1. Connect the outlet pipe to the 1-inch connector
with the supplied hose as shown below.
2. Fix the pipe to the wall with a suitable bracket.
3.6 Installing the float switch
15 cm
1 2
3
46
5
TM085714
Installing the float switch
Pos. Description
1 Inlet pipe
2 Rainwater tank
3 Strainer
4 Float switch
5 Counterweight
6 Water level
The float switch must be installed in the rainwater
tank. Proceed as follows:
1. Place the float switch as shown in the illustration
above.
2. Adjust the counterweight so that there is a
distance of at least 20 cm between the float switch
and the counterweight.
3. After adjusting the float switch, make sure that the
cable is protected along its entire length:
a. Place the cable in a casing tube.
b. Reconnect the float switch cable at the control
box.
The float switch must change the
contact at least 15 cm before the
inlet strainer fills with air.
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English (GB)

PWR NC C NA
NEUTRAL
LIVE
GND
WHITE
GREY
BROWN
A
B
AB
PINK
GREEN
YELLOW
GRAY/CLOSE A
BROWN/OPEN A
PINK
NC
NA
CGREEN
YELLOW
WHITE/NEUTRAL
MOTOR AUXILIARY
MICROSWITCH
45
GND
BLACK
BLUE
SIDE “I”
SIDE “II”
1=
2= NA
NC
12
6
3
TM085630
Electrical diagram
Pos. Description
1 Relay
2 Power input
3 Three-way valve
4 Terminal
5 Float switch
6 Water source control switch
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English (GB)

4. Starting up the product
Do not turn on the power supply until the
pump has been filled with liquid.
4.1 Priming the product
1. Unscrew the priming plug and pour at least 1.7
litres (0.45 gallons) of water into the pump
housing.
2. Screw the priming plug on again.
Example:
TM075342
Priming the pump
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.
4.2 Starting up the pump
After installing and priming, follow the following steps
to start up the pump.
1. Prime the pump according to the priming
instructions.
2. Open all isolating valves.
3. Open the tapping point that is the highest or
furthest away from the pump to let out air trapped
in the system.
4. Turn on the pump's power supply. All the symbols
on the operating panel will light up briefly.
The Stop icon remains on.
5. Press the Start/Stop button to start the pump. If
there is a suction lift, it may take up to five
minutes before the pump delivers water
depending on the length and diameter of the inlet
pipe.
6. When the water flows through the tapping point
without air, close the tapping point. The pump will
stop after approx. 10 seconds.
7. The startup is now completed, and the pump is
ready for operation.
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English (GB)

4.3 Operation
4.3.1 Normal operation
When water is consumed in the water supply system,
the pump starts if the starting conditions of the pump
are fulfilled. This happens, for example, when a tap is
opened, making the pressure in the system drop.
The pump stops when the consumption stops, i.e.
when the tap is closed.
4.3.1.1 Starting and stopping conditions
To ensure optimal performance, the cut-in
pressure is set by Grundfos. It is therefore
not possible to adjust the cut-in pressure.
Starting conditions
The pump starts when at least one of the following
conditions is fulfilled:
• The flow is higher than Qmin (1.5 l/min).
• The pressure is lower than pstart.
Stopping conditions
The pump stops with a time delay of 10 seconds
when both of the following conditions are fulfilled:
• The flow is lower than Qmin (1.5 l/min).
• The pressure is higher than pstart.
The pstart values are shown in Technical data.
4.4 Shaft seal run-in
The shaft seal faces are lubricated by the pumped
liquid. A slight leakage from the shaft seal of up to 10
ml per day or 8 to 10 drops per hour may occur.
Under normal conditions, the leaking liquid will
evaporate. As a result, no leakage will be detected.
When the pump is started 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.
Leaking liquid will drain through the drain holes in the
motor flange.
Install the product in such a way that leakage cannot
cause undesirable collateral damage.
5. Control functions
5.1 Overflow alarm
If the refill valve starts to leak, causing loss of water
from the mains through the inner overflow drain, an
overflow alarm will be triggered. The pump is stopped
and two opposite yellow indicator lights will flash
simultaneously on Grundfos Eye. The alarm blocks
the system without any audible warning.
The alarm must be reset by switching the button on
the back of the pump from 1-Alarm D on to 0-Alarm
D off. See the figure below.
TM085720
Related information
6.8 The pump is not running
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English (GB)

5.2 Operating panel
SCALA1
Stop
TM075407
Symbol Description
Grundfos Eye: The indicator light
shows the operating status of the
product.
Start/Stop: Press the button to make
the product ready for operation or to
start and stop the product.
Start: If you press the button when
the product is stopped, the product
starts if no other functions with higher
priority have been enabled.
Stop: If you press the button when
the product is running, the product
always stops.
The pump is stopped. The stop icon
will light up on the display.
Bluetooth connect button enables
communication with Grundfos GO.
The connection indicator light will
light up when the connection to
Grundfos GO is established.
Reset the pump alarms.
The following alarm lights indicate an issue with
installation:
Symbol Description
Leakage in the system.
Dry running or water shortage.
The maximum runtime has been
exceeded.
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English (GB)

5.3 Auto reset
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 factory setting is on.
The auto-reset function works as follows:
Alarm Auto-reset action Configurable Default
Dry running
The pump will attempt eight restarts at five-minute
intervals. If not successful, this cycle will be repeated
after 24 hours.
In twin configuration Duty/Assist, there is no reset if
only one pump is in dry run alarm. If both pumps are in
dry run, the reset will be staggered.
In twin configuration Duty/Standby, the pump will
attempt to restart immediately independent of the
second pump.
Yes On
Anti-cycling This function will attempt to reset after 12 hours, and
the pump will return to normal operation. Yes Off
Max. runtime None Fixed disabled
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English (GB)

5.4 Dry-running protection
If a dry-running alarm has been activated,
the cause should be identified before the
pump is restarted to prevent damage to
the pump.
The unit incorporates dry-running protection that
automatically stops the pump in case of dry-running.
The dry-running protection functions differently during
priming and operation.
5.4.1 Dry-running during priming
If the unit does not detect pressure and flow within 5
minutes after it has been connected to a power
supply, and the pump has started, the dry-running
alarm is activated.
5.4.2 Dry-running during operation
If the unit does not detect pressure and flow within 40
seconds during normal operation, the dry-running
alarm is activated.
5.4.3 Resetting of dry-running alarm
If the dry-running alarm has been activated, the pump
can be restarted manually by pressing [Reset]. If the
unit does not detect pressure and flow within 40
seconds after restarting, the dry-running alarm is
reactivated.
This protection is always ON.
Dry-running or water shortage.
5.5 Anti-cycling
If there is a minor leakage in the system, or a tap has
not been closed entirely, the unit will start and stop
the pump periodically. To avoid cycling, the anti-
cycling function of the unit will stop the pump and
indicate an alarm. The anti-cycling function can be
configurated in Grundfos GO.
Off
If the pump starts 40 times in a fixed pattern, an
indicator light will signal cycling. The pump will remain
in normal operation.
On
If the pump starts and stops in a fixed pattern, there is
a leakage in the system. The pump stops, Grundfos
Eye is flashing red and an indicator light is on.
The factory setting for this function is off.
Leakage in the system.
Related information
6.5 The pump starts and stops too frequently
5.6 Maximum runtime
This function is a timer that can turn off the pump if it
runs continuously for a certain amount of time. This
time period can be adjusted via Grundfos GO.
Off
The pump will run depending on the operating
conditions disregarding the continuous operation.
On
The pump will stop after the specified period of
continuous operation, and it will show the alarm
Maximum runtime exceeded. This alarm will always
need to be reset manually.
The factory setting for this function is off.
Maximum runtime exceeded.
16
English (GB)

5.7 Performance modes
Different performance modes can be selected for SCALA1. Selecting the correct mode is dependent on the
installation.
There are 3 performance modes for SCALA1:
• self-priming
• air handling
• positive inlet.
The default mode is self-priming, which will be the desired mode for most installations.
Performance mode Description Benefits
Self-priming The self-priming valve is fully
opened.
Best performance and lowest noise
level in suction applications.
Air handling 1)
When there is air in the
installations, it can accumulate in
the hydraulics. Partially closing the
self-priming valve can provide
assistance.
Improves the pump's capability to
handle air in the water.
Positive inlet
If the installation has a positive inlet
pressure, the pump is always
primed, and the self-priming valve
can be fully closed.
Removes sound associated with
self-priming valve movement in
installations with positive inlet
pressure.
1) This performance mode will result in some performance loss and a slight increase in noise level. Refer to technical data for more
information.
17
English (GB)

5.8 Selecting the performance mode
If the performance mode needs to be changed from
the default setting, follow these steps:
1. Remove the pump cover.
a. Unscrew and remove the priming plug from the
pump.
b. Loosen and remove the inlet and outlet
connections from the pump.
c. Loosen and pull away the pump cover to
remove it from the pump.
TM075488
Remove the pump cover
2. Locate the performance mode knob.
3. Using a size 10 hexagon key, turn the knob to the
desired selection.
2
1
3
TM075489
Turn the knob to select performance mode
Pos. Description
1 Air handling
2 Self-priming
3 Positive inlet
4. Return the pump cover and reconnect the priming
plug and connections.
6. Fault finding
CAUTION
Hot surface
Minor or moderate personal injury
‐Do not run the pump continuously with
a closed inlet or outlet valve.
CAUTION
Hot or cold liquid
Minor or moderate personal injury
‐Make sure that escaping hot or cold
liquid does not cause injury to persons
or damage to the equipment.
18
English (GB)

6.1 Grundfos Eye SCALA1
Grundfos Eye indicates the operating conditions of the motor on the motor operating panel.
TM085776
Grundfos Eye indicator light
Grundfos Eye Cause Remedy
No lights are on. Power off
The motor is not running.
Two opposite green indicator lights
are permanently on.
Power on
The motor is not running.
Two opposite green indicator lights
are rotating.
Power on
The motor is running. The indicator lights are
rotating in the direction of rotation of the motor
when seen from the non-drive end.
Two opposite red indicator lights
are flashing simultaneously.
Alarm
The motor has stopped.
Two opposite yellow lights are
permanently on.
The pump was stopped by:
• external input
• calendar function
• twin communication failure (only SCALA1).
Two yellow and two green lights
are permanently on. The pump is performing a self-test.
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English (GB)

6.2 The pump does not start
Grundfos Eye:
No lights are on.
Cause Remedy
The fuses in the
electrical installation
have blown.
• Replace the fuses if
they are blown.
• Check the electrical
installation.
The earth leakage
circuit breaker or the
voltage-operated circuit
breaker has tripped.
1. Reset the circuit
breaker.
No power supply. 1. Switch on the power
supply.
2. Check for blown fuses
in the electrical
installation.
3. Check the cables and
cable connections for
defects and loose
connections.
4. Contact the power
supply authorities.
6.3 The pump does not start
Grundfos Eye:
Two opposite green
indicator lights are
permanently on.
Cause Remedy
The difference between
the SCALA1 unit and
the tapping point is
too large.
• Adjust the installation
or select a SCALA1
unit with a higher head.
6.4 The pump is not running, and the
indicator light for dry running and water
shortage is on
Grundfos Eye:
Two opposite red
indicator lights are
flashing simultaneously.
The indicator light for dry
running and water
shortage is on.
Cause Remedy
Dry running or water
shortage.
• Check the water
source, and prime the
pump.
Impurities are blocking
the inlet pipe.
• Clean the inlet pipe.
The foot or non-return
valve is blocked in a
closed position.
• Clean, repair or
replace the foot or non-
return valve.
Leakage in the inlet
pipe.
• Repair the inlet pipe.
Air in the inlet pipe or
the pump.
• Prime the inlet pipe
and the pump. Check
the inlet conditions of
the pump.
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English (GB)