Grundfos SCALA2 User manual

SCALA2
Installation and operating instructions
GRUNDFOS INSTRUCTIONS
Other languages
http://net.grundfos.com/qr/i/98880508

2

3
Table of contents
SCALA2
English (GB)
Installation and operating instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
(AR)
   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Declaration of conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

English (GB)
4
English (GB) Installation and operating instructions
Original installation and operating instructions
These installation and operating instructions
describe Grundfos SCALA2 domestic water supply
pumps.
Sections 1-5 give the information necessary to be
able to unpack, install and start up the product in a
safe way.
Sections 6-14 give important information about the
product, as well as information on service, fault
finding and disposal of the product.
CONTENTS
Page
1. General information 5
1.1 Target group 5
1.2 Hazard statements 5
1.3 Notes 5
2. Receiving the product 5
2.1 Inspecting the product 5
2.2 Scope of delivery 5
3. Installing the product 5
3.1 Location 5
3.2 System sizing 6
3.3 Mechanical installation 6
3.4 Electrical connection 9
4. Starting up the product 10
4.1 Priming the pump 10
4.2 Starting the pump 10
4.3 How to set the correct pressure 11
4.4 Shaft seal run-in 11
5. Handling and storing the product 12
5.1 Handling the product 12
5.2 Storing the product 12
6. Product introduction 12
6.1 Product description 12
6.2 Intended use 12
6.3 Pumped liquids 12
6.4 Identification 13
7. Control functions 14
7.1 Menu overview, SCALA2 14
8. Setting the product 15
8.1 Setting the outlet pressure 15
8.2 Locking and unlocking the operating
panel 15
8.3 Expert settings, SCALA2 15
8.4 Resetting to factory settings 17
9. Servicing the product 17
9.1 Maintaining the product 17
9.2 Customer service information 18
9.3 Service kits 18
10. Starting up the product after standstill 19
10.1 Deblocking the pump 19
11. Taking the product out of operation 19
12. Fault finding the product 20
12.1 Grundfos Eye operating indications 20
12.2 Fault resetting 20
12.3 Fault finding chart 21
13. Technical data 24
13.1 Operating conditions 24
13.2 Mechanical data 24
13.3 Electrical data 24
13.4 Dimensions and weights 24
14. Disposing of the product 24
Read this document and the quick guide
before installing the product. Installation
and operation must comply with local
regulations and accepted codes of good
practice.
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.

English (GB)
5
1. General information
1.1 Target group
These installation and operating instructions are
intended for professional as well as non-professional
users.
1.2 Hazard statements
The symbols and hazard statements below may
appear in Grundfos installation and operating
instructions, safety instructions and service
instructions.
The hazard statements are structured in the
following way:
1.3 Notes
The symbols and notes below may appear in
Grundfos installation and operating instructions,
safety instructions and service instructions.
2. Receiving the product
2.1 Inspecting the product
Check that the product received is in accordance
with the order.
Check that the voltage and frequency of the product
match the voltage and frequency of the installation
site. See section 6.4.1 Nameplate.
2.2 Scope of delivery
The box contains the following items:
• 1 Grundfos SCALA2 pump
• 1 quick guide
• 1 safety instructions booklet.
3. Installing the product
3.1 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.
3.1.1 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.
3.1.2 Installing the product in frosty environment
Protect the pump from freezing if it is to be installed
outdoors where frost may occur.
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.
SIGNAL WORD
Description of hazard
Consequence of ignoring the warning.
- Action to avoid the hazard.
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.
Install the pump in such a way that no
undesirable collateral damage can arise
due to leakage.
If the unlikely event of an internal leakage
occurs, the liquid will be drained through
the bottom of the pump.

English (GB)
6
3.2 System sizing
The pump is factory-set to 3 bar (44 psi) 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.
3.3 Mechanical installation
3.3.1 Positioning the product
Always mount the pump on the base plate in a
horizontal position with a maximum inclination angle
of ± 5 °.
3.3.2 Foundation
Fasten the pump to a solid horizontal foundation by
means of screws through the holes in the base plate.
See figs 1 and 2.
Fig. 1 Horizontal foundation
Fig. 2 Base plate
3.3.3 Connecting the piping system
1. Turn the union nuts by hand to loosen the inlet
and outlet ports. See fig. 3.
2. Seal the pipe fittings with thread sealing tape.
3. Carefully screw the inlet and outlet connections
to the pipe fittings using a pipe wrench or similar
tool. Keep the union nut on the pipe fitting if you
have removed it from the pump.
The pump is equipped with flexible connections,
± 5 °, to facilitate the connection of inlet and
outlet pipes.
4. Fasten the connections to the inlet and outlet.
Hold the connection with one hand and tighten
the union nut with the other hand.
Fig. 3 How to fit the connections
Make sure that the system in which the
pump is incorporated is designed for the
maximum pump pressure.
DANGER
Electric shock
Death or serious personal injury
- Switch off the power supply before
starting any work on the product. Make
sure that the power supply cannot be
accidentally switched on.
TM06 5729 5315TM06 3809 1015
[mm (inches)]
A 181 (7.13)
B 130 (5.12)
C 144 (5.67)
B
A
C
Make sure that the pump is not stressed
by the piping system.
Always loosen and tighten the union nuts
on the inlet and outlet ports by hand.
Damage to the inlet and outlet parts
increases the risk of leakage.
TM06 4318 1915
Pos. Description
1 Inlet and outlet port
2 Union nut
3 Pipe fitting
1
2
3

English (GB)
7
3.3.4 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.
Fig. 4 How to reduce noise in the installation
3.3.5 Installation examples
Fittings, hoses and valves are not supplied with the
pump.
We recommend to follow the installation examples in
sections 3.3.6 to 3.3.8.
3.3.6 Mains water pressure boosting
Fig. 5 Mains water pressure boosting
We recommend to use flexible hoses and
mount the pump on a vibration-damping
rubber pad.
TM06 4321 1915
Rubber pad
Pipe hanger for rigid pipe
Flexible hose
TM06 4347 2015
Pos. Description
1 Highest tapping point
2 Pipe hangers and supports
3 Isolating valves
4 Flexible hoses
5 Bypass valve
6
Optional pressure-reducing valve on the
inlet side if the inlet pressure can exceed
10 bar (145 psi)
7
Optional pressure-relief valve on the outlet
side if the installation cannot withstand a
pressure of 6 bar (87 psi)
8
Drip tray. Install the pump on a small stand
to prevent the ventilation holes from being
flooded.
9 Pressure gauge
10 Mains water pipe
49
1
37
2
5
10
62
3
8

English (GB)
8
3.3.7 Suction from a well
Fig. 6 Suction from a well
3.3.8 Suction from freshwater tank
Fig. 7 Suction from freshwater tank
TM06 4349 4117
Pos. Description
1 Highest tapping point
2 Isolating valve
3 Flexible hoses
4 Pipe support
5
Inlet filter.
If the water may contain sand, gravel or
other debris, please install a filter on the
inlet side to protect the pump and
installation.
6 Foot valve with strainer (recommended).
H1 Maximum suction lift is 8 m (26 ft).
H2 Inlet pipe must be submersed at least 0.5
m (1.64 ft).
H2 H1
6
54
23
1
TM06 4348 4117
Pos. Description
1 Highest tapping point
2 Pipe hangers
3 Isolating valve
4 Flexible hoses
5 Drain to sewer
6
Inlet filter.
If the water may contain sand, gravel or
other debris, please install a filter on the
inlet side to protect the pump and
installation.
7 Freshwater tank
8 Foot valve with strainer (recommended)
A Minimum 1 ° inclination
A
1
2
34
6
7
8
5

English (GB)
9
3.3.9 Inlet pipe length
The overview below shows the different possible
inlet pipe lengths, depending on the vertical pipe
length.
The overview is only intended as a guide.
Fig. 8 Inlet pipe length
Preconditions:
3.4 Electrical connection
3.4.1 Motor protection
The pump incorporates current and temperature
dependent motor protection.
TM06 4372 4117
DN 32 DN 40
H
[m (ft)]
L
[m (ft)]
H
[m (ft)]
L
[m (ft)]
0 (0) 68 (223) 0 (0) 207 (679)
3 (10) 43 (141) 3 (10) 129 (423)
6 (20) 17 (56) 6 (20) 52 (171)
7 (23) 9 (30) 7 (23) 26 (85)
8 (26) 0 (0) 8 (26) 0 (0)
Maximum flow velocity: 1 l/s (16 gpm).
Inside roughness of pipes: 0.01 mm (0.0004 inch).
Size Inside pipe diameter
[mm (inches)]
Pressure loss
[m/m (psi/ft)]
DN 32 28 (1.1) 0.117 (5/100)
DN 40 35.2 (1.4) 0.0387 (1.6/100)
H
L
Carry out the electrical connection
according to local regulations.
Check that the supply voltage and
frequency correspond to the values stated
on the nameplate.
DANGER
Electric shock
Death or serious personal injury
- Switch off the power supply before
starting any work on the product. Make
sure that the power supply cannot be
accidentally switched on.
DANGER
Electric shock
Death or serious personal injury
- The pump must be earthed.
- The pump is supplied with 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
(protective earthing).
- If national legislation requires a
Residual Current Device (RCD), a
Ground Fault Circuit Interrupter (GFCI),
or equivalent in the electrical
installation, this must be type B
(according to UL/IEC 61800-5-1) or
better, due to the nature of the constant
DC leakage current.
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.
We recommend that you fit the permanent
installation with a residual-current circuit
breaker (RCCB) with a tripping current
less than 30 mA.

English (GB)
10
3.4.2 Plug connection
3.4.3 Connection without plug
4. Starting up the product
4.1 Priming the pump
1. Unscrew the priming plug and pour minimum 1.7
litres (0.45 gallons) of water into the pump
housing. See fig. 9.
2. Screw the priming plug on again.
4.2 Starting the pump
1. Open a tap to prepare the pump for venting.
2. Insert the power plug into the socket or turn on
the power supply and the pump will start.
3. When water flows without air, close the tap.
4. Open the highest tapping point in the installation,
preferably a shower.
5. Adjust the pressure setpoint to the required
pressure by means of the buttons. See
section 4.3 How to set the correct pressure.
6. Close the tapping point.
Startup has been completed.
Fig. 9 Priming the pump
DANGER
Electric shock
Death or serious personal injury
- Check that the power plug delivered
with the product is in compliance with
local regulations.
- Make sure that the pump is connected
only to a properly grounded,
grounding-type receptacle (protective
earthing).
- The protective earth of the power outlet
must be connected to the protective
earth of the pump. The plug must
therefore have the same PE connection
system as the power outlet. If not, use a
suitable adapter.
The electrical connection must be carried
out by an authorised electrician in
accordance with local regulations.
DANGER
Electric shock
Death or serious personal injury
- The pump must be connected to an
external main switch with a minimum
contact gap of 3 mm (0.12 inch) in all
poles.
Do not start the pump until it has been
filled with liquid.
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.
TM06 4204 1615

English (GB)
11
4.3 How to set the correct pressure
The pump can be set to provide a water pressure
between 1.5 to 5.5 bar (22 to 80 psi) at intervals of
0.5 bar (7 psi).
The factory setting is 3 bar (44 psi). See section
3.2 System sizing.
4.3.1 Boosting from a well or a tank
If you are boosting from a well or a tank, make sure
not to set the pressure setpoint too high. The
difference between the inlet pressure and outlet
pressure must not exceed 3.5 bar (51 psi).
Fig. 10 Boosting from a well or a tank
4.3.2 Boosting from the mains
The pressure settings 4.5, 5.0 and 5.5 bar (65, 73
and 80 psi) require a positive inlet pressure and
these settings must only be used when boosting
from the water mains.
Fig. 11 Boosting from the mains
4.3.3 Self-learning setpoint
If the pump cannot reach the user-defined pressure
setpoint, the self-learning function will automatically
lower the setpoint. See section 8.3.2 Self-learning
function.
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.
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.
The leakage is visible where the screws are mounted
on the base plate. If the unlikely event of an internal
leakage occurs, the liquid will be drained through the
bottom of the pump. Install the pump in such a way
that no undesirable collateral damage can arise.
We recommend to use the default
pressure of 3.0 bar (44 psi) which will suit
most applications.
The difference between the inlet pressure
and outlet pressure must not exceed 3.5
bar (51 psi).
Example: If the inlet pressure is 0.5 bar (7
psi), the maximum outlet pressure is 4 bar
(58 psi).
If you set the pressure too high, this might
cause the pump to operate for up to three
minutes after the tap is turned off.
Maximum setpoint [bar (psi)]
Well application 3.0 (44)
Tank below ground level 3.5 (51)
Tank above ground level 4.0 (58)
TM07 0075 4117 TM07 0076 4117
TM07 0074 4117

English (GB)
12
5. Handling and storing the product
5.1 Handling the product
5.2 Storing the product
If the pump is to be stored for a period of time, for
example during the winter, drain it and store it
indoors in a dry location. See section 10. Starting up
the product after standstill.
Temperature range during storing must be -40 to 70
°C (-40 to 158 °F).
6. Product introduction
6.1 Product description
Fig. 12 Grundfos SCALA2 pump
The inlet and outlet openings include flexible
connections of ± 5 °.
6.2 Intended use
The pump is suitable for pressure boosting of fresh
water in domestic water supply systems.
6.3 Pumped liquids
The pump is designed for fresh water with a
maximum chloride content of 300 ppm and a free
chlorine content below 1 ppm.
The pump is not suitable for these liquids:
• liquids containing long fibres
• flammable liquids (oil, petrol, etc.)
• aggressive liquids.
Take care not to drop the pump as it may
break.
Maximum relative humidity during storing: 95 % RH.
TM06 3818 1015
Pos. Description
1 Air valve for built-in pressure tank
2Operating panel. See section 7. Control
functions.
3 Nameplate. See section 6.4.1 Nameplate.
4Plug for access to pump shaft. See
section 10.1 Deblocking the pump.
5Priming plug. See section 4.1 Priming the
pump.
6Outlet opening. See section
3.3.3 Connecting the piping system.
7Inlet opening. See section
3.3.3 Connecting the piping system.
8 Drain plug. See section 6.4 Identification.
9Ventilation holes. They must not be
flooded.
15
6
7
8
2
3
4
9
This pump has been evaluated for use with
water only.
Only use SCALA2 pumps according to the
specifications stated in these installation
and operating instructions.
If the water can contain sand, gravel or
other debris, there is a risk of pump
blockage.
Please install a filter on the inlet side or
apply a floating strainer to protect the
pump.

English (GB)
13
6.4 Identification
6.4.1 Nameplate
Fig. 13 Example of nameplate
6.4.2 Type key
TM06 4340 2015
Pos. Description
1 Type designation
2 Product number
3 Serial number
4 Production code, year and week
5 Maximum head
6 Minimum head
7 Rated head
8 Rated flow rate
9 Maximum ambient temperature
10 Enclosure class
11 Maximum operation pressure
12 Maximum liquid temperature
13 Minimum and maximum rated power
14 Model
15 Voltage and frequency
16 Approvals
17 Minimum and maximum rated current
DK-8850 Bjerringbro, Denmark
SCALA2 3-45 AKCHDE
Model A
200-240V 50/60Hz
Made in Serbia
P/N 99999999
S/N 
P/C 1519
H
max
H min
H nom
Q nom
45 m
16 m
27 m
3m /h
3
45 C/
55 C
T amb.max
IPX4D
I(A)
Min.
Max.
P1(W)
0.01
2.8 550
2
T
liq.max /P syst.max:
1MPa
NRP XXX-XXX-XXXXXX
PCS XXXXX.XX.XX 04-6292.2.41-2003
LSPr-022-IDN
1
2
3
4
5
6
7
8
9
10
11
13
14
15
16
17
12
SCALA2 3 -45 A K C H D E
Type range
SCALA2
Rated flow rate
3: [m3/h]
Maximum head
45: [m]
Material code
A: Standard
Supply voltage
K: 1 x 200-240 V, 50/60 Hz
M: 1 x 208-230 V, 60 Hz
V: 1 x 115 V, 60 Hz
W: 1 x 100-115 V, 50/60 Hz
Motor
C: High-efficiency motor with frequency
converter
Mains cable and plug
A: Cable with plug, IEC type I, AS/NZS3112,
2m
B: Cable with plug, IEC type B, NEMA 5-15P,
6ft
C: Cable with plug, IEC type E&F, CEE7/7, 2 m
D: Cable without plug, 2 m
G: Cable with plug, IEC type G, BS1363, 2 m
H: Cable with plug, IEC type I, IRAM 2073, 2 m
J: Cable with plug, NEMA 6-15P, 6 ft
K: Cable with plug, IEC type B, JIS C 8302, 2 m
L: Cable with plug, IEC type L, CEI 23-16/VII,
2m
O: Cable with plug, IEC type O, TIS 166-2549,
2 m
Controller
D: Integrated frequency converter
Thread
E: R 1" composite material
F: NPT 1" composite material

English (GB)
14
7. Control functions
7.1 Menu overview, SCALA2
Fig. 14 SCALA2 operating panel
7.1.1 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.
Flashing green lights indicate that the pump has
automatically lowered the pressure. See section
4.3.3 Self-learning setpoint.
Fig. 15 SCALA2 outlet pressure indication
Fig. 16 Pressure indication table
TM06 3301 5114
SCALA2 Function
On/off
Increases the outlet pressure.
Decreases the outlet pressure.
Resets alarms.
Indicates the required outlet pressure.
Indicates that the pump has been
stopped manually.
Indicates that the operating panel is
locked.
TM06 4345 2015TM06 4187 4117
BAR PSI Water colum kPa MPa
[m]
5.5 80 55 550 0.55
5.0 73 50 500 0.50
4.5 65 45 450 0. 45
4.0 58 40 400 0. 40
3.5 51 35 350 0.35
3.0 44 30 300 0.30
2.5 36 25 250 0.25
2.0 30 20 200 0.20
1.5 22 15 150 0.15
}
}
}
}

English (GB)
15
7.1.2 Indicator lights for 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 8.3.3 Auto reset.
For further information about system status, see
section 12. Fault finding the product.
8. Setting the product
The pump will remember the controller settings even
if it is turned off.
8.1 Setting the outlet pressure
Adjust the outlet pressure by pressing .
8.2 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
1. Hold down the buttons simultaneously for 3
seconds.
2. The operating panel is locked when symbol
lights up.
How to unlock the operating panel
1. Hold down the buttons simultaneously for 3
seconds.
2. The operating panel is unlocked when symbol
turns off.
8.3 Expert settings, SCALA2
The expert setting menu allows the installer to toggle
between the following functions:
• self-learning
• auto reset
• anti cycling
• maximum continuous operating time.
Indications Description
Operating indications
The operating panel is locked.
Power supply failure
The pump is blocked, for instance
the shaft seal has seized up.
Leakage in the system
Dry running or water shortage*
The maximum pressure has been
exceeded or the setpoint cannot be
reached.
The maximum runtime has been
exceeded.
The temperature is outside the
range.
Expert settings are for installers only.

English (GB)
16
8.3.1 Accessing the expert settings
Proceed as follows:
1. Hold down the button for 5 seconds.
2. 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.
Fig. 17 Expert menu overview
8.3.2 Self-learning function
The factory setting for this function is "on".
On
If the pump cannot reach the user-defined pressure
setpoint, the self-learning function will automatically
adjust the setpoint.
The pump will lower the setpoint to either 4.5, 3.5 or
2.5 bar (65, 51 or 36 psi).
The self-learned setpoint is indicated on the
operating panel by one flashing green light.
After every 24 hours, the pump will automatically
attempt to revert to the original user-defined
setpoint. If this is not possible, the pump will again
return to the self-learned setpoint. The pump will
continue to operate with the self-learning setpoint,
until the user-defined setpoint can be reached.
Example:
The user-defined pressure is set to 5 bar (72 psi),
indicated by constant green lights on the pressure
indicator panel.
The pump is unable to reach this pressure due to
negative pressure on the inlet side.
The self-learning function automatically adjusts the
setpoint to 3.5 bar (51 psi), indicated by one flashing
green light on the pressure indicator panel.
After 24 hours, the pump will automatically try to
adjust the setpoint back to 5 bar (72 psi).
Fig. 18 User-defined setpoint (left) and
self-learned setpoint (right)
How to reset the self-learned setpoint
1. You can manually reset the settings by pressing
any button on the operating panel. The pump will
immediately try to reach the original setpoint.
2. If the pump keeps reducing the setpoint due to
self-learning, we recommend to reduce the
setpoint manually on the operating panel.
Off
If you set the self-learning function to off and the
pump is unable to reach the desired setpoint, the
pump will show alarm 5.
Move cursor up.
Move cursor down.
Toggle settings.
TM06 4346 4117
Auto reset
Anti cycling
Maximum
continuous
operating time
Exit expert menu
Self-learning
TM07 0078 4117 TM07 0079 4117

English (GB)
17
8.3.3 Auto reset
The factory setting for this function 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 for
SCALA2.
Off
All alarms must be reset manually by means of the
button.
8.3.4 Anti cycling
The factory setting for this function is "off".
This function monitors the starts and stops 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.
8.3.5 Maximum continuous operating time
The factory setting for this function 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.
8.4 Resetting to factory settings
The pump can be reset to factory setting by pressing
the buttons simultaneously for 5 seconds.
9. Servicing the product
9.1 Maintaining the product
9.1.1 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. 19.
Clean the insect filter once a year or as needed.
Fig. 19 Insect filter
Indication Action
Water shortage
The pump will attempt eight
restarts at five-minute intervals.
If not successful, this cycle will
be repeated after 24 hours.
Dry running
(pump not
primed)
Prime the pump and reset it
manually.
All other
indications
The pump will attempt three
restarts within the first 60
seconds, then eight restart
attempts at five-minute intervals.
If not successful, this cycle will
be repeated after 24 hours.
Leakage in the system.
Maximum runtime exceeded.
DANGER
Electric shock
Death or serious personal injury
- 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.
TM06 4537 2515

English (GB)
18
9.1.2 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.
Fig. 20 SCALA2 pump
To remove the inlet non-return valve, follow the
steps below:
1. Turn off the power supply and disconnect the
power plug.
2. Shut off the water source.
3. Open a tap to release the pressure in the pipe
system.
4. Close the isolating valves and/or drain the pipes.
5. Gradually open and remove the priming plug.
See fig. 20 (5).
6. Remove the drain plug and drain the pump. See
fig. 20 (8).
7. Unscrew the union nut holding the inlet
connection. See fig. 20 (7). Depending on the
installation type, it may be necessary to remove
the pipes from both the inlet and outlet
connections.
8. Pull out the inlet connection.
9. Pull out the inlet non-return valve.
10. Clean the non-return valve with warm water and
a soft brush.
11. Assemble the components in reverse order.
To remove the outlet non-return valve, follow the
steps below:
1. Turn off the power supply and disconnect the
power plug.
2. Shut off the water source.
3. Open a tap to release the pressure in the pipe
system.
4. Close the isolating valves and/or drain the pipes.
5. Gradually open and remove the priming plug.
See fig. 20 (5). The plug and non-return valve are
one unit.
6. Clean the non-return valve with warm water and
a soft brush.
7. Assemble the components in reverse order.
Fig. 21 Outlet and inlet non-return valves
9.2 Customer service information
For further information on service parts, see
Grundfos Product Center on
www.product-selection.grundfos.com.
9.3 Service kits
For further information on service kits, see Grundfos
Product Center on www.grundfos.com.
TM06 3818 1015
15
6
7
8
2
3
4
9
TM06 4331 1915
Outlet non-return
valve
Inlet non-return
valve

English (GB)
19
10. Starting up the product after
standstill
1. Check that the pump is not blocked by following
the instructions in section 10.1 Deblocking the
pump.
2. If the pump has been drained, it must be filled
with liquid before startup. See section
4.1 Priming the pump.
3. Start up the pump. Follow the instructions in
section 4. Starting up the product.
4. The pump will remember the controller settings
even if it is turned off.
10.1 Deblocking the pump
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.
Fig. 22 Deblocking the pump
11. Taking the product out of
operation
If the pump is taken out of operation for a period of
time, for example during the winter, it must be
disconnected from the power supply and placed in a
dry location.
Proceed as follows:
1. Stop the pump by means of the on/off button .
2. Disconnect the power supply.
3. Open a tap to release the pressure in the pipe
system.
4. Close the isolating valves and/or drain the pipes.
5. Gradually loosen the priming plug to release the
pressure in the pump.
6. Remove the drain plug to drain the pump. See
fig. 23.
7. We recommend to store the pump indoors in a
dry location. Due to humidity, the disconnected
pump must not be left outside for a longer period
of time.
Fig. 23 Draining the pump
DANGER
Electric shock
Death or serious personal injury
- Switch off the power supply before
starting any work on the product. Make
sure that the power supply cannot be
accidentally switched on.
TM06 4202 1615
TM06 4203 1615

English (GB)
20
12. Fault finding the product
12.1 Grundfos Eye operating indications
12.2 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
the auto reset function in the service menu.
Grundfos Eye Indication Description
No lights are on. The power is off.
The pump is not running.
Two opposite green indicator lights running in
the direction of rotation of the pump.
The power is on.
The pump is running.
Two opposite green indicator lights at a 45 °
angle is the icon used throughout this
document for pump running.
The power is on.
The pump is running.
Two opposite green indicator lights
permanently on.
The power is on.
The pump is not running.
Two opposite red indicator lights flashing
simultaneously.
Alarm.
The pump has stopped.
Two opposite red indicator lights is the icon
used throughout this document for pump
stopped.
Alarm.
The pump has stopped.