Grundfos SCALA2 User manual

SCALA2
Installation and operating instructions
GRUNDFOS INSTRUCTIONS

SCALA2
English (GB)
Installation and operating instructions ..........................................................5
Български (BG)
Упътване за монтаж и експлоатация.........................................................26
Čeština (CZ)
Montážní a provozní návod .................................................................48
Deutsch (DE)
Montage- und Betriebsanleitung .............................................................69
Dansk (DK)
Monterings- og driftsinstruktion ..............................................................91
Eesti (EE)
Paigaldus- ja kasutusjuhend ...............................................................112
Español (ES)
Instrucciones de instalación y funcionamiento ..................................................133
Suomi (FI)
Asennus- ja käyttöohjeet ..................................................................155
Français (FR)
Notice d'installation et de fonctionnement .....................................................176
Ελληνικά (GR)
Οδηγίες εγκατάστασης και λειτουργίας........................................................197
Hrvatski (HR)
Montažne i pogonske upute ................................................................219
Magyar (HU)
Telepítési és üzemeltetési utasítás...........................................................240
Italiano (IT)
Istruzioni di installazione e funzionamento .....................................................261
Lietuviškai (LT)
Įrengimo ir naudojimo instrukcija ............................................................282
Latviešu (LV)
Uzstādīšanas un ekspluatācijas instrukcija ....................................................303
Nederlands (NL)
Installatie- en bedieningsinstructies ..........................................................324
Polski (PL)
Instrukcja montażu i eksploatacji ............................................................345
Português (PT)
Instruções de instalação e funcionamento .....................................................366
Română (RO)
Instrucţiuni de instalare şi utilizare ...........................................................388
Srpski (RS)
Uputstvo za instalaciju i rad ................................................................409
Svenska (SE)
Monterings- och driftsinstruktion.............................................................430
Slovensko (SI)
Navodila za montažo in obratovanje .........................................................451
Slovenčina (SK)
Návod na montáž a prevádzku..............................................................472
3
Table of contents

Türkçe (TR)
Montaj ve kullanım kılavuzu ................................................................493
Українська (UA)
Інструкції з монтажу та експлуатації ........................................................514
中文 (CN)
安装和使用说明书 .......................................................................537
日本語 (JP)
取扱説明書............................................................................. 558
한국어 (KO)
설치 및 작동 지침........................................................................579
Bosanski (BS)
Montažne i pogonske upute ................................................................600
Bahasa Indonesia (ID)
Petunjuk pengoperasian dan pemasangan ....................................................621
Macedonian (MK)
Упатства за монтирање и ракување ........................................................642
Malaysia (MY)
Cara pemasangan dan pengendalian ........................................................665
Norsk (NO)
Installasjons- og driftsinstruksjoner ..........................................................686
(AR) ةيبرعلا
    ......................................................................707
ไทย (TH)
คำแนะนำในการติดตั้งและการใชงาน ...........................................................728
Tiếng Việt (VI)
Hướng dẫn lắp đặt và vận hành.............................................................749
Íslenska (IS)
Uppsetningar- og notkunarleiðbeiningar.......................................................770
Français (CA)
Notice d'installation et de fonctionnement .....................................................791
Español (MX)
Instrucciones de instalación y operación ......................................................814
4SCALA2
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..............................6
2. Product introduction........................6
2.1 Product description .........................6
2.2 Intended use .............................6
2.3 Pumped liquids ............................6
2.4 Identification..............................7
3. Receiving the product.......................8
3.1 Inspecting the product........................8
3.2 Scope of delivery...........................8
4. Installation requirements .....................8
4.1 Location ................................8
4.2 System sizing .............................8
5. Mechanical installation ......................8
5.1 Positioning the product .......................8
5.2 Foundation ..............................9
5.3 Connecting the piping system ...................9
5.4 How to reduce noise in the installation ..............9
5.5 Locking pin .............................10
5.6 Installation examples .......................10
6. Electrical connection ......................13
6.1 Motor protection ..........................13
6.2 Plug connection ..........................13
6.3 Connection without plug .....................13
7. Starting up the product .....................13
7.1 Priming the pump .........................13
7.2 Starting the pump .........................13
7.3 Pressure setting ..........................14
7.4 Shaft seal run-in ..........................14
8. Handling and storing the product ..............15
8.1 Handling the product .......................15
8.2 Storing the product.........................15
9. Control functions .........................15
9.1 Menu overview, SCALA2 .....................15
10. Setting the product........................17
10.1 Setting the outlet pressure ....................17
10.2 Locking and unlocking the operating panel ..........17
10.3 Expert settings, SCALA2 .....................17
10.4 Resetting to factory settings ...................18
11. Servicing the product ......................19
11.1 Maintaining the product ......................19
11.2 Customer service information ..................19
11.3 Service kits .............................19
12. Starting up the product after standstill ...........20
12.1 Deblocking the pump .......................20
13. Taking the product out of operation .............20
14. Fault finding ............................21
14.1 Grundfos Eye operating indications...............21
14.2 Fault resetting............................21
14.3 Fault finding chart .........................22
15. Technical data ...........................24
15.1 Operating conditions........................24
15.2 Mechanical data ..........................24
15.3 Electrical data............................24
15.4 Dimensions and weights .....................25
16. Disposing of the product ....................25
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 concern-
ing 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. Instal-
lation 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 indi-
cates 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 mal-
function or damage to the equipment.
Tips and advice that make the work easier.
5
English (GB)

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
1
5
6
7
8
2
3
4
9
TM063818
Grundfos SCALA2 pump
Pos. Description
1 Air valve for built-in pressure tank
2 Operating panel. See section Control functions.
3 Nameplate. See section Nameplate.
4Plug for access to pump shaft. See section Deblocking the
pump.
5 Priming plug. See section Priming the pump.
6 Outlet opening. See section Connecting the piping system.
7 Inlet opening. See section Connecting the piping system.
8 Drain plug. See section Identification.
9 Ventilation holes. They must not be flooded.
The inlet and outlet openings include flexible connections of ± 5 °.
Related information
2.4.1 Nameplate
5.3 Connecting the piping system
7.1 Priming the pump
12.1 Deblocking the pump
2.2 Intended use
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.
The pump is suitable for pressure boosting of fresh water in
domestic water supply systems.
2.3 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.
If the water can contain sand, gravel or other debris, there
is a risk of pump blockage.
Install a filter on the inlet side or apply a floating strainer to
protect the pump.
6
English (GB)

2.4 Identification
2.4.1 Nameplate
1
2
3
4
6
5
7
8
9
10
11
12
13
14
15
16
17
18
TM064340
Example of nameplate
Pos. Description
1 Type designation
2 Product number
3 Serial number
4 Production code (year and week)
5 Barcode
6 Max. head
7 Min. head
8 Rated head
9 Rated flow rate
10 Max. ambient temperature
11 Enclosure class
12 Max. operating pressure
13 Max. liquid temperature
14 Min. and max. rated power
15 Model
16 Voltage and frequency
17 Approvals
18 Min. and max. rated current
2.4.2 Type key
Example: SCALA2.3-.45.A.1 x 200-240 V.50/60 Hz.C.H.D.E
Code Explanation Designation
SCALA2 Type range
3Rated flow rate
[m3/h]
45 Max. head [m]
A Standard Material code
1 x
200-240
V, 50/60
Hz
Supply voltage
1 x
208-230
V, 60 Hz
1 x 115 V,
60 Hz
1 x
100-115
V, 50/60
Hz
CHigh-efficiency motor with fre-
quency converter Motor
ACable with plug, IEC type I, AS/
NZS3112, 2 m
Mains cable and plug
BCable with plug, IEC type B,
NEMA 5-15P, 6 ft
CCable with plug, IEC type E&F,
CEE7/7, 2 m
D Cable without plug, 2 m
GCable with plug, IEC type G,
BS1363, 2 m
HCable with plug, IEC type I,
IRAM 2073, 2 m
JCable with plug, NEMA 6-15P, 6
ft
KCable with plug, IEC type B, JIS
C 8302, 2 m
LCable with plug, IEC type L, CEI
23-16/VII, 2 m
OCable with plug, IEC type O, TIS
166-2549, 2 m
PCable with plug, IEC type D/M,
IS 1293, 2 m
D Integrated frequency converter Controller
E R 1" composite material Thread
F NPT 1" composite material
7
English (GB)

3. Receiving the product
3.1 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.
Related information
2.4.1 Nameplate
3.2 Scope of delivery
The box contains the following items:
• 1 Grundfos SCALA2 pump
• 1 quick guide
• 1 safety instructions booklet
• 1 quick guide for locking pin (only for versions with locking pin).
4. Installation requirements
4.1 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.
The product must be installed in a well-ventilated room to ensure
cooling of its components.
The installation location must be protected from rain, humidity,
condensation, direct sunlight and dust.
The relative air humidity must not exceed 95 %.
Install the pump in such a way that no undesirable collat-
eral damage can arise due to leakage.
If the unlikely event of an internal leakage occurs, the liq-
uid will be drained through the bottom of the pump.
4.1.1 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.
4.1.2 Installation of the product in a frosty environment
Protect the product from freezing if it is to be installed outdoors
where frost may occur.
4.2 System sizing
Make sure that the system in which the pump is incorpora-
ted is designed for the maximum pump pressure.
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.
4.2.1 Maximum system pressure
Make sure that the system in which the pump is installed
is designed for the maximum pump pressure.
When installing a non-return valve in the plumbing sys-
tem, make sure that the system has an expansion tank at
the water heater and that the pressure-relief valve in the
water heater is plumbed to a drain. Carry out the installa-
tion in accordance with local regulations.
The maximum inlet pressure depends on the head at the actual
duty point. The sum of the inlet pressure and the head must not
exceed the maximum system pressure.
We recommend installing a pressure-relief valve to protect the
pump so that the outlet pressure does not exceed the maximum
system pressure.
5. Mechanical installation
DANGER
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 can-
not be switched on accidentally.
5.1 Positioning the product
Always mount the pump on the base plate in a horizontal position
with a maximum inclination angle of ± 5 °.
8
English (GB)

5.2 Foundation
Fasten the pump to a solid horizontal foundation by means of
screws through the holes in the base plate. See the figures below.
TM065729
Horizontal foundation
A
B
C
TM063809
Base plate
[mm (inch)]
A 181 (7.13)
B 130 (5.12)
C 144 (5.67)
5.3 Connecting the piping system
Make sure that the pump is not stressed by the piping sys-
tem.
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.
1. Turn the union nuts by hand to loosen the inlet and outlet ports.
See the figure below.
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.
1
2
3
TM064318
How to fit the connections
Pos. Description
1 Inlet and outlet port
2 Union nut
3 Pipe fitting
5.4 How to reduce noise in the installation
We recommend to use flexible hoses and mount the pump
on a vibration-damping rubber pad.
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 the figure below.
Place pipe hangers for the rigid pipes close to the connection of the
flexible hose.
1
2
3
TM064321
How to reduce noise in the installation
Pos. Description
1 Rubber pad
2 Pipe hanger for rigid pipe
3 Flexible hose
9
English (GB)

5.5 Locking pin
The pump may produce a clicking noise if there is positive pressure
at the inlet of the pump. In this case, you can mount a locking pin to
avoid this noise. When a locking pin is mounted, the self-priming
function is not applicable.
If the pump has a negative pressure at the inlet, removing the
locking pin is necessary to enable the self-priming function.
5.5.1 Mounting the locking pin
To mount the locking pin, proceed as follows:
1. Turn off the pump.
2. Close the inlet and outlet valves to the pump to avoid backflow.
3. Loosen and remove the drain plug.
4. Insert the locking pin.
TM1040380
5. Mount and tighten the drain plug.
6. Open the inlet and outlet valves and turn on the pump.
7. If necessary, prime the pump.
5.5.2 Removing the locking pin
To remove the locking pin, proceed as follows:
1. Turn off the pump.
2. Close the inlet and outlet valves to the pump to avoid backflow.
3. Loosen and remove the drain plug.
4. Remove the locking pin with a small plier.
TM1040381
5. Mount and tighten the drain plug.
6. Open the inlet and outlet valves and turn on the pump.
5.6 Installation examples
Fittings, hoses and valves are not supplied with the pump.
We recommend to follow the installation examples in sections
Mains water pressure boosting to Suction from freshwater tank.
All installations must be carried out in accordance with lo-
cal regulations.
Related information
5.6.1 Mains water pressure boosting
5.6.2 Suction from a well
5.6.3 Suction from freshwater tank
5.6.4 Inlet pipe length
10
English (GB)

5.6.1 Mains water pressure boosting
In some countries, boosting from the city water mains is
prohibited. Please follow local regulations regarding this
application.
49
1
37
2
5
10
62
3
8
TM064347
Mains water pressure boosting, SCALA2
Pos. Description
1 Highest tapping point
2 Pipe hangers and supports
3 Isolating valves
4 Flexible hoses
5 Bypass valve
6Optional pressure-reducing valve on the inlet side if the
pressure can exceed 10 bar (145 psi).
7Optional pressure-relief valve on the outlet side if the instal-
lation cannot withstand a pressure of 6 bar (87 psi).
8Drip tray. Install the pump on a small stand to prevent the
ventilation holes from being flooded.
9 Pressure gauge
10 Mains water pipe
5.6.2 Suction from a well
H2 H1
6
54
2
3
1
TM064349
Suction from a well
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).
11
English (GB)

5.6.3 Suction from freshwater tank
A
1
2
34
6
7
8
5
TM064348
Suction from freshwater tank
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
5.6.4 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.
H
L
TM064372
Inlet pipe length
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)
Preconditions:
Maximum flow velocity 1 l/s (16 gpm)
Inside roughness of pipes 0.01 mm (0.0004 inch)
Size Inside pipe diameter
[mm (inch)]
Pressure loss
[mm (psi/ft)]
DN 32 28 (1.1) 0.117 (5/100)
DN 40 35.2 (1.4) 0.0387 (1.6/100)
12
English (GB)

6. Electrical connection
Carry out the electrical connection according to local regu-
lations.
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 you start any work
on the product. Make sure that the power supply can-
not be switched on accidentally.
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 De-
vice (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 quali-
fied 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.
6.1 Motor protection
The pump incorporates current and temperature dependent motor
protection.
6.2 Plug connection
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 prop-
erly grounded, grounding-type receptacle (protective
earthing).
‐The protective earth of the power outlet must be con-
nected 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.
6.3 Connection without plug
The electrical connection must be carried out by an au-
thorised 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.
7. Starting up the product
Do not start the pump until it has been filled with liquid.
7.1 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. Priming the
pump.
2. Screw the priming plug on again.
If the suction depth exceeds 6 m (20 ft), it may be neces-
sary to prime the pump more than once.
Always tighten priming and drain plugs by hand.
Related information
7.2 Starting the pump
7.2 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.
6. Close the tapping point.
Startup has been completed.
TM064204
Priming the pump
Related information
7.3 Pressure setting
13
English (GB)

7.3 Pressure setting
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 System sizing.
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 pres-
sure must not exceed 3.5 bar (51 psi).
Example: If the inlet pressure is 0.5 bar (7 psi), the maxi-
mum 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.
You can achieve more energy efficient operation and pro-
long the life of the pump by making sure that the tank pre-
charge pressure is optimised to 70 % of the setpoint of the
pump. See the table below for recommended optimal tank
precharge pressure.
Optimal tank precharge pressure
Setpoint
[bar (psi)]
Optimal tank precharge pressure setting
[bar (psi)]
5.5 (80) 3.9 (57)*
5 (73) 3.5 (51)*
4.5 (65) 3.2 (46)*
4 (58) 2.8 (4.1)
3.5 (51) 2.5 (36)
3 (44) 2.1 (30)
2.5 (36) 1.8 (26)
2 (29) 1.4 (20)
1.5 (22) 1.1 (16)
*Only with positive inlet pressure.
Related information
4.2 System sizing
7.3.1 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).
Maximum setpoint [bar (psi)]
Well application 3.0 (44)
Tank below ground level 3.5 (51)
Tank above ground level 4.0 (58)
TM070075 TM070076_
Boosting from a well or a tank
7.3.2 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.
TM070074
Boosting from the mains
7.3.3 Self-learning setpoint
If the pump cannot reach the user-defined pressure setpoint, the
self-learning function will automatically lower the setpoint.
Related information
10.3.2 Self-learning function
7.4 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.
14
English (GB)

8. Handling and storing the product
8.1 Handling the product
Take care not to drop the pump as it may break.
8.2 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.
Temperature range during storing must be -40 to +70 °C (-40 to
+158 °F).
Maximum relative humidity during storing 95 % RH
Related information
12. Starting up the product after standstill
9. Control functions
9.1 Menu overview, SCALA2
TM063301
SCALA2 operating panel
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.
15
English (GB)

9.1.1 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.
TM064345
SCALA2 outlet pressure indication
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
}
}
}
}
TM064187
Pressure indication table
Related information
7.3.3 Self-learning setpoint
9.1.2 Indicator lights for SCALA2
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.
*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.
For further information about system status, see section Fault
finding.
Related information
10.3.3 Auto reset
14.3 Fault finding chart
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English (GB)

10. Setting the product
The pump will remember the controller settings even if it is turned
off.
10.1 Setting the outlet pressure
Adjust the outlet pressure by pressing .
10.2 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.
10.3 Expert settings, SCALA2
Expert settings are for installers only.
The expert setting menu allows the installer to toggle between the
following functions:
• self-learning
• auto reset
• anti cycling
• maximum continuous operating time.
10.3.1 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.
Move cursor up.
Move cursor down.
Toggle settings.
5
1
2
3
4
TM064346
Expert menu overview
Pos. Description
1 Auto reset
2 Anti cycling
3 Maximum continuous operating time
4 Exit expert menu
5 Self-learning
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English (GB)

10.3.2 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).
TM070078 TM070079
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.
10.3.3 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:
Indication Action
Water shortage
The pump will attempt eight restarts at five-
minute intervals. If not successful, this cy-
cle 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 at-
tempts at five-minute intervals. If not suc-
cessful, this cycle will be repeated after 24
hours.
Off
All alarms must be reset manually by means of the button.
Related information
9.1.2 Indicator lights for SCALA2
10.3.4 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.
Leakage in the system.
10.3.5 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.
Maximum runtime exceeded.
10.4 Resetting to factory settings
The pump can be reset to factory setting by pressing the
buttons simultaneously for 5 seconds.
18
English (GB)

11. Servicing the product
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.
11.1 Maintaining the product
11.1.1 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 the figure below..
Clean the insect filter once a year or as needed.
TM064537
Insect filter
11.1.2 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.
1
2
3
4
5
TM1040332
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 the figure
above (5).
6. Remove the drain plug and drain the pump. See the figure
above (8).
7. Unscrew the union nut holding the inlet connection. See the
figure above (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 the figure
above (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.
1
2
TM064331
Outlet and inlet non-return valves
Pos. Description
1 Outlet non-return valve
2 Inlet non-return valve
11.2 Customer service information
For further information on service parts, see Grundfos Product
Center on www.product-selection.grundfos.com.
11.3 Service kits
For further information on service kits, see Grundfos Product Center
at www.product-selection.grundfos.com.
19
English (GB)

12. Starting up the product after standstill
1. Check that the pump is not blocked by following the instructions
in section 12.1 Deblocking the pump.
2. If the pump has been drained, it must be filled with liquid before
startup. See section 7.1 Priming the pump.
3. Start up the pump. Follow the instructions in section 7. Starting
up the product.
4. The pump will remember the controller settings even if it is
turned off.
Related information
7. Starting up the product
7.1 Priming the pump
12.1 Deblocking the pump
12.1 Deblocking the pump
DANGER
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 can-
not be switched on accidentally.
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.
TM064202
Deblocking the pump
13. 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 the figure below.
7. We recommend storing the pump indoors in a dry location. Due
to humidity, the disconnected pump must not be left outside for
a longer period of time.
TM064203
Draining the pump
20
English (GB)