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GRUNDFOS INSTRUCTIONS
SCALA
Installation and operating instructions
English (GB) Installation and operating instructions
English (GB)
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
1.1 Target group
1.2 Hazard statements
1.3 Notes
2. Receiving the product
2.1 Inspecting the product
2.2 Scope of delivery
3. Installing the product
3.1 Location
3.2 System sizing
3.3 Mechanical installation
3.4 Electrical connection
4. Starting up the product
4.1 Priming the pump
4.2 Starting the pump
4.3 How to set the correct pressure
4.4 Shaft seal run-in
5. Handling and storing the product
5.1 Handling the product
5.2 Storing the product
6. Product introduction
6.1 Product description
6.2 Intended use
6.3 Pumped liquids
6.4 Identification
7. Control functions
7.1 Menu overview, SCALA2
8. Setting the product
8.1 Setting the outlet pressure
8.2 Locking and unlocking the operating panel
8.3 Expert settings, SCALA2
8.4 Resetting to factory settings
9. Servicing the product
9.1 Maintaining the product
9.2 Customer service information
9.3 Service kits
10. Starting up the product after standstill
10.1 Deblocking the pump
11. Taking the product out of operation
12. Fault finding the product
12.1 Grundfos Eye operating indications
12.2 Fault resetting
12.3 Fault finding chart
13. Technical data
13.1 Operating conditions
13.2 Mechanical data
13.3 Electrical data
13.4 Dimensions and weights
14. Disposing of the product
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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.
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1. General information
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1.1 Target group
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These installation and operating instructions are intended for
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professional as well as non-professional users.
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1.2 Hazard statements
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The symbols and hazard statements below may appear in
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Grundfos installation and operating instructions, safety
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instructions and service instructions.
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The hazard statements are structured in the following way:
Children shall not play with the appliance. Cleaning
and user maintenance shall not be made by children
without supervision.
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.
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1.3 Notes
B
A
C
The symbols and notes below may appear in Grundfos
installation and operating instructions, safety instructions and
service instructions.
Observe these instructions for explosion-proof
products.
A blue or grey circle with a white graphical symbol
indicates that an action must be taken.
A red or grey circle with a diagonal bar, possibly with
a black graphical symbol, indicates that an action
must not be taken or must be stopped.
If these instructions are not observed, it may result in
malfunction or damage to the equipment.
Tips and advice that make the work easier.
2. Receiving the product
3.2 System sizing
Make sure that the system in which the pump is
incorporated 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.
3.3 Mechanical installation
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.
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.
English (GB)
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.
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.
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.
TM06 5729 5315 TM06 3809 1015
Fig. 1 Horizontal foundation
Fig. 2 Base plate
[mm (inches)]
A 181 (7.13)
B 130 (5.12)
C 144 (5.67)
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3.3.3 Connecting the piping system
1
2
3
Rubber pad
Pipe hanger for rigid pipe
Flexible hose
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1
37
2
5
10
6
2
3
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English (GB)
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.
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.
TM06 4321 1915TM06 4347 2015
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. 3 How to fit the connections
Pos. Description
1 Inlet and outlet port
2 Union nut
3 Pipe fitting
3.3.4 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 fig. 4.
Place pipe hangers for the rigid pipes close to the connection of
the flexible hose.
TM06 4318 1915
Fig. 5 Mains water pressure boosting
Pos. Description
1 Highest tapping point
2 Pipe hangers and supports
3 Isolating valves
4 Flexible hoses
5 Bypass valve
Optional pressure-reducing valve on the inlet side if the
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inlet pressure can exceed 10 bar (145 psi)
Optional pressure-relief valve on the outlet side if the
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installation cannot withstand a pressure of 6 bar (87 psi)
Drip tray. Install the pump on a small stand to prevent
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the ventilation holes from being flooded.
9 Pressure gauge
10 Mains water pipe
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3.3.7 Suction from a well
H2 H1
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5
4
2
3
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A
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2
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6
7
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H
L
Fig. 6 Suction from a well
Pos. Description
1 Highest tapping point
2 Isolating valve
3 Flexible hoses
4 Pipe support
Inlet filter.
If the water may contain sand, gravel or other debris,
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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).
3.3.8 Suction from freshwater tank
Pos. Description
8 Foot valve with strainer (recommended)
A Minimum 1 ° inclination
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.
TM06 4349 4117
Fig. 8 Inlet pipe length
DN 32 DN 40
H
[m (ft)]
L
[m (ft)]
H
[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).
English (GB)
TM06 4372 4117
L
[m (ft)]
Inside pipe diameter
Size
[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)
TM06 4348 4117
Fig. 7 Suction from freshwater tank
Pos. Description
1 Highest tapping point
2 Pipe hangers
3 Isolating valve
4 Flexible hoses
5 Drain to sewer
Inlet filter.
If the water may contain sand, gravel or other debris,
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please install a filter on the inlet side to protect the pump
and installation.
7 Freshwater tank
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3.4 Electrical connection
English (GB)
Carry out the electrical connection according to local
regulations.
Check that the supply voltage and frequency
correspond to the values stated on the nameplate.
4. Starting up the product
Do not start the pump until it has been filled with
liquid.
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.
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.
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 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.
3.4.1 Motor protection
The pump incorporates current and temperature dependent
motor protection.
3.4.2 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
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.
3.4.3 Connection without plug
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.
TM06 4204 1615
Fig. 9 Priming the pump
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