Grundfos SCALA1 User manual

SCALA1 System
Installation and operating instructions
GRUNDFOS INSTRUCTIONS

SCALA1 System
English (GB)
Installation and operating instructions ..................................4
Deutsch (DE)
Montage- und Betriebsanleitung .....................................24
Français (FR)
Notice d'installation et de fonctionnement...............................45
Italiano (IT)
Istruzioni di installazione e funzionamento ..............................66
Nederlands (NL)
Installatie- en bedieningsinstructies ...................................86
3
Table of contents

English (GB) Installation and operating instructions
Original installation and operating instructions
Table of contents
1. General information ............. 4
1.1 Hazard statements .............. 4
1.2 Notes ..................... 4
1.3 Target group.................. 5
2. Product introduction ............ 5
2.1 Product description .............. 5
2.2 Pumped liquids ................ 5
3. Installation requirements .......... 6
3.1 Mechanical installation ............ 6
4. Starting up the product ........... 9
4.1 Priming the product .............. 9
4.2 Starting up the pump ............. 9
4.3 Operation ...................10
4.4 Shaft seal run-in................10
5. Control functions ..............10
5.1 Operating panel ................11
5.2 Auto reset ...................12
5.3 Dry-running protection ............12
5.4 Anti-cycling ..................12
5.5 Maximum runtime ...............13
6. Fault finding .................14
6.1 Grundfos Eye SCALA1 ............14
6.2 The pump does not start ...........16
6.3 The pump is not running ...........16
6.4 The pump is running .............18
6.5 The pump cuts out during operation .....18
6.6 The pump performance is insufficient ....19
6.7 The pump starts and stops too frequently ..19
6.8 The pump does not stop ...........20
6.9 The pump gives electric shocks .......20
6.10 Fault resetting .................20
7. Maintenance .................21
7.1 Cleaning the filter ...............21
8. Technical data ................21
8.1 Operating conditions .............21
8.2 Mechanical data................22
8.3 Electrical data .................22
8.4 Dimensions and weights ...........22
9. Disposing of the product ..........22
9.1 Disposing of hazardous or toxic materials ..23
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 super-
vision 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 seri-
ous personal injury.
CAUTION
Indicates a hazardous situation which, if
not avoided, could result in minor or mod-
erate 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.
4
English (GB)

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, in-
dicates 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.
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 simi-
lar 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 wa-
ter.
If the water contains sand, gravel or other
debris, there is a risk of pump blockage
and pump damage. Install a filter on the in-
let side or apply a floating strainer to pro-
tect 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:
• drinking water
• rainwater.
5
English (GB)

3. Installation requirements
3.1 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 thor-
oughly with clean water.
WARNING
Biological hazard
Death or serious personal injury
‐Before the pump is used for supplying
drinking water, flush the pump thor-
oughly with clean water.
3.1.1 Wall installation
1
2
3
4
5
68 7
9
TM079805
Pos. Description
1 Electronic switch
2 SCALA1 System
3 Filter
4 Rainwater tank
5 Suction filter/float switch
Pos. Description
6 Suction pipe
7 Tank overflow
8 Sewer line
9 Mains water supply
Before installing the product, ensure that the sewage
system is at least 1 metre below where the
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.
6
English (GB)

3.1.1.1 Mounting the product
The security screws are essential to en-
sure the stability of the system and the
safety of persons.
12
TM079194
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.
3.1.2 Overflow connection
To install the overflow connection, follow the steps
below:
1. Connect the DN50 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.
7
English (GB)

3.1.3 Connecting the tap water pipe
When tightening the pipe, make sure the
tap water hose does not turn.
The float switch that regulates the back-
flow of the tap water is designed to oper-
ate 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 net-
work can lead to a leak or a malfunctioning
float switch.
We recommend installing an on/off tap up-
stream 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.
3.1.4 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 in the rainwater
tank a float switch fitted with a suction
strainer and a non-return valve.
1. Install the system as close to the rainwater tank
as possible.
a. Never exceed a suction height 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.
Example:
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)
3.1.5 Connecting the outlet pipe
Install an on/off tap upstream of the
float switch to cut off the mains water sup-
ply in case of breakage or malfunction so
that maintenance can be carried out safe-
ly.
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.
8
English (GB)

3.1.6 Installing the level sensor
The level sensor must be installed in the rainwater
tank. Please proceed as follows:
1. Place the float as shown below.
15 cm
3
412
TM079193
Installing the float switch
2. Adjust the counterweight so that it is at least 20
cm above the float.
3. After adjusting the float, make sure that the cable
is protected along its entire length:
a. Place the cable in a casing tube.
b. Reconnect the float cable at the 3-way valve.
1
4
32
DBDB
GG
TM079197
4. The float switch must change the contact at least
15 cm before the suction strainer fills with air.
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.
9
English (GB)

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.
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
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
10
English (GB)

5.1 Operating panel
SCALA1
Stop
TM075407
Symbol Description
Grundfos Eye: The indicator light
shows the operating status of the prod-
uct.
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.
Pump is stopped. The stop icon will
light up on the display.
Bluetooth connect button enables
communication with Grundfos GO Re-
mote. Connection indicator light. It will
light up when the connection to Grund-
fos GO Remote is established.
Reset the alarms.
Symbol Description
The following alarm lights indicate an issue with in-
stallation:
Leakage in the system.
Dry-running or water shortage.
The maximum runtime has been ex-
ceeded.
11
English (GB)

5.2 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 run
The pump will attempt eight restarts at five-minute in-
tervals. If not successful, this cycle will be repeated af-
ter 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 at-
tempt to restart immediately independent of the sec-
ond pump.
YES ON
Anti-cycling This function will attempt to reset after 12 hours, and
the pump will return to normal operation. YES ON
Max. runtime None Fixed disabled
Missed twin
pump
Auto reset is performed by the system when communi-
cation is reestablished. Fixed enabled
5.3 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.
5.3.1 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.
5.3.2 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.
5.3.3 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.
5.4 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 Remote.
Off
If the pump starts 40 times in a fixed pattern, a LED
icon will signalize 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, and the pump will stop and
show red Grundfos Eye and LED icon indication.
The factory setting for this function is OFF.
Leakage in the system.
12
English (GB)

5.5 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
Remote.
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.
13
English (GB)

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.
6.1 Grundfos Eye SCALA1
Grundfos Eye indicates the operating conditions of the motor on the motor operating panel.
A
TM054846
14
English (GB)

Grundfos Eye indicator light
Grundfos Eye Cause Remedy
No lights are on. The power is off.
The motor is not running.
Two opposite green lights are perma-
nently on.
The power is on.
The motor is not running.
Two opposite green lights are rotat-
ing.
The power is on.
The motor is running.
The indicator lights are rotating in the direction of ro-
tation 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 per-
manently on.
The pump was stopped by external input, calendar
function or twin communication failure.
Two yellow and four green lights are
permanently on. The pump is performing a self-test.
15
English (GB)

6.2 The pump does not start
Grundfos Eye Indicator
light
Auto-
matic re-
set
Cause Remedy
- - The fuses in the electrical installa-
tion have blown.
Replace the fuses. If the new
fuses blow as well, check the elec-
trical installation.
- -
The earth leakage circuit breaker or
the voltage-operated circuit breaker
has been tripped.
Cut in the circuit breaker.
- - No power supply. Contact the power supply authori-
ties.
- -
The difference between SCALA1
unit and the tapping point is too
large.
Adjust the installation or select a
SCALA1 unit with a higher head.
Cause Remedy
6.3 The pump is not running
Grundfos Eye Indicator
light
Auto-
matic
reset
Cause Remedy
- - Power supply failure.
Switch on the power supply.
Check the cables and cable con-
nections for defects and loose
connections. Check for blown
fuses in the electrical installation.
Yes
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.
16
English (GB)

Grundfos Eye Indicator
light
Auto-
matic
reset
Cause Remedy
No Maximum runtime has been ex-
ceeded.
Check the installation for leakage
and reset the alarm.
Yes
The internal non-return valve is
defective or blocked in com-
pletely or partially open posi-
tion.
Small leakage is detected by
the anti-cycling function. Alarm
is on.
Clean, repair or replace the non-
return valve.
Check the taps and reconsider
the usage pattern, e.g. ice ma-
chines, water evaporators for air-
conditioning, etc.
- No
The shaft seal is seized up.
The pump is blocked by impuri-
ties.
See section 10. Starting up the
product after the standstill.
No No Overheating due to seized-up
or choked-up pump. Contact your pump supplier.
No No Too low or too high supply volt-
age.
Check the supply voltage and
correct the fault, if possible.
No -
The pump has been stopped by
external input or calendar func-
tion.
Cause Remedy
17
English (GB)

6.4 The pump is running
Grundfos Eye Indicator light
Auto-
matic
reset
Cause Remedy
No
The non-return valve is not
properly closed, or the pipe
system is leaking. This hap-
pens when cycling alarm
and/or leakage alarm are disa-
bled.
Check and repair the pipe system,
or clean, repair or replace the
non-return valve.
No Small continuous consumption.
Check the taps and reconsider the
usage pattern (ice machines, wa-
ter evaporators for air-condition-
ing, etc.).
Cause Remedy
6.5 The pump cuts out during operation
Condition
Grundfos Eye Indicator
light
Automat-
ic reset Cause Remedy
- - Overheating due to excessive liquid
temperature above 45 °C.
Supply cold liquid to the
pump.
- -
Overheating caused by
– high ambient temperature 55 °C
– overloaded motor
– seized-up motor or pump.
Contact your pump sup-
plier.
- - Supply voltage too low.
Check the supply voltage
and correct the fault, if
possible.
Cause Remedy
18
English (GB)

6.6 The pump performance is insufficient
Grundfos Eye Indicator
light
Automat-
ic reset Cause Remedy
- - Pump inlet pressure is too low. Check pump inlet conditions.
- - Pump is undersized. Replace the pump with a larger
pump.
- - Inlet pipe, inlet strainer or pump
are partially blocked by impurities. Clean the inlet pipe or the pump.
- - 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 pump inlet conditions.
Cause Remedy
6.7 The pump starts and stops too frequently
Grundfos Eye Indicator
light
Automatic
reset Cause Remedy
- - Leakage in suction pipe or air
in the water.
Restore the water supply or repair
suction pipe.
- - A tap has not been closed en-
tirely after use.
Check that all taps have been closed.
See section Anti-cycling.
- - Minor leakage in the system. Check the system for leakages.
See section Anti-cycling.
Cause Remedy
19
English (GB)

6.8 The pump does not stop
Grundfos Eye Indicator
light
Automatic
reset Cause Remedy
- - The pump cannot deliver the necessary
discharge pressure. Replace the pump.
- - The existing pipes are leaking or defec-
tive. Repair the pipes.
- - The non-return valve is blocked or miss-
ing.
Clean the valve or fit a
non-return valve.
Cause Remedy
6.9 The pump gives electric shocks
Grundfos
Eye
Indicator
light
Automatic re-
set Cause Remedy
- - - Defective earth
connection.
Connect the earth connection to the
pump according to local regulations.
Cause Remedy
6.10 Fault resetting
A fault indication can be reset in one of the 2 following ways:
1. Eliminate the fault cause and reset the pump manually by pressing the [Reset] button.
2. Enable the Auto reset function.
Example:
If the fault disappears by itself, the pump will attempt to reset automatically, and the fault indication
will disappear. The fault indication will still be visible in the Grundfos GO Remote alarm log.
20
English (GB)