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
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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.
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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.
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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.
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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.
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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.
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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.
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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
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English (GB)