Grundfos SSL Series, STL Series, STC Series, SSR Series, STR Series Instructions Manual
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Shower pumps
SSL, STL, STC, SSR, STR, SSP, STP, SSN and STN
Installation and operating instructions
GRUNDFOS INSTRUCTIONS
English (GB)
2
English (GB) Installation and operating instructions
Original installation and operating instructions.
CONTENTS
Page
1. Symbols used in this document
2. General description
These installation and operating instructions apply to Grundfos
shower pumps, types STL, SSL, STC, STR, SSR, STP, SSP, STN
and SSN.
2.1 Applications
Grundfos shower pumps are suitable for pressure boosting of
clean (fresh) water, without any additives, in domestic hot- and
cold-water systems.
2.2 Type key
1. Symbols used in this document
2
2. General description
2
2.1 Applications
2
2.2 Type key
2
3. Installation
3
3.1 Positioning the pump
3
3.2 Pipework
4
3.3 Cold-water storage tank
5
3.4 Valves and strainers
5
3.5 Connecting the pump
6
3.6 Temperature setting
7
3.7 Installation options
7
4. Electrical installation
7
4.1 1 x 230 V, 50 Hz
7
4.2 Low-voltage pumps (STL and SSL)
8
5. Startup
8
5.1 Shaft seal run-in
9
6. Universal-head pumps
9
6.1 General description
9
6.2 Dry-running protection
9
6.3 Connecting the pump
10
6.4 Operating instructions
10
6.5 Installation options
10
7. Technical data
10
8. Fault finding
11
8.1 Positive-head pumps (STP, SSP, STC, STL, SSL, STR,
SSR)
11
8.2 Universal-head pumps (STN, SSN,STC CN and STL 2.0
CN)
12
9. How it works
13
9.1 Universal-head pumps
13
10. Engineer check list
13
11. Maintenance and service
13
12. Disposal
13
Warning
Prior to installation, read these installation and
operating instructions. Installation and operation
must comply with local regulations and accepted
codes of good practice.
Warning
The use of this product requires experience with
and knowledge of the product.
Persons with reduced physical, sensory or
mental capabilities must not use this product,
unless they are under supervision or have been
instructed in the use of the product by a person
responsible for their safety.
Children must not use or play with this product.
Warning
If these safety instructions are not observed,
it may result in personal injury.
Warning
If these instructions are not observed, it may lead
to electric shock with consequent risk of serious
personal injury or death.
Caution
If these safety instructions are not observed,
it may result in malfunction or damage to the
equipment.
Note
Notes or instructions that make the job easier
and ensure safe operation.
Example S T P 2.0 B
S: Shower pump
T: Twin impeller
S: Single impeller
P: Positive head
N: Universal (negative) head
L: Low voltage
C: Centrifugal
R: Regenerative
Maximum head [bar]
Material:
B: Brass
C: Composite
CN: Composite, universal (negative) head
English (GB)
3
3. Installation
The system in which this product is incorporated must be
designed to meet the pumps requirements.
Symbols used in illustrations
Fig. 1 Do not connect directly to the mains.
Fig. 2 Connection to mains via storage tank
3.1 Positioning the pump
Keep the pump as close as possible to the source of hot and cold
water.
For optimum performance, ensure the following:
• A good water flow to the pump.
• Sufficient inlet head. See table and fig. 3.
• Unrestrictive pipework, 22 mm. See fig. 4.
• Provision to prevent air locks. See fig. 4.
Place the pump in a well-ventilated location.
Fig. 3 Inlet head
Symbol Description
Cold-water storage tank
Hot-water cylinder
Shower pump
Shower head
Tap or outlet
Hot water
Cold water
Mains supply pipe
Caution
Do not connect the pump directly to the water
mains supply.
Do not use the pump with combination boilers.
Make sure that no foreign particles (such as
solder and dust) are allowed to enter the pump.
Note
The pump cannot operate if the level of the water
in the cold-water storage tank is below the level
of the pump.
TM05 6978 0313
> 227 litres
(50 gallons)
TM05 6977 0313
Note
Select a position for installing the pump which
affords easy access for subsequent servicing
and maintenance.
Type Inlet head [m]
STP, SSP 1-20
STN, SSN 1-8
STC CN, STL-2.0 CN 2-8
STC 2-10
STL, SSL 2-10
STR, SSR 1-10
TM05 6968 0313
> 227 litres
(50 gallons)
=
H
inlet
> 227 litres
(50 gallons)
English (GB)
4
Fig. 4 Unrestricted pipework
Position the pump horizontally with the outlet ports vertically
upwards to ensure correct operation of the flow switches.
Fig. 5 Positioning the pump
Connect the pump and shower system as shown in fig. 10.
There must be a minimum height between the bottom of the cold-
water storage tank and the highest point of the outlet pipework or
the shower outlet of at least 250 mm. See fig. 6.
Fig. 6 Minimum height difference
Install the pump in accordance with the Water Supply (Water
Fittings) regulations 1999.
Position the pump at the base of the hot-water cylinder.
See fig. 7.
Fig. 7 Positioning the pump in relation to hot-water cylinder
For installation within a bathroom, locate the pump in accordance
with local regulations.
Position the pump at least 0.6 metres horizontally away from or
3 metres vertically above floor from any bath, shower tray or
basin.
3.1.1 Foundation
Install the pump on a vibration-free foundation. In case of wooden
floors use a small concrete foundation of approx. 225 x 225 mm
and 40 to 50 mm thick.
Fig. 8 Foundation
3.2 Pipework
Fig. 9 Solder flux causes damage to plastic parts
Fig. 10 Pipework connection to hot-water cylinder
TM05 6976 0313
Caution
Do not cover the pump; otherwise the motor will
overheat.
Caution
Place the pump in a frost-free location.
TM05 6969 0313TM05 6967 0313TM05 6975 0313
> 227 litres
(50 gallons)
Min. 250 mm
Warning
The pump may be fitted under a bath, providing
this space is only accessible through the use of a
tool.
TM05 6987 0313 - TM05 6988 0313
Caution
Do not allow any solder flux to come into contact
with any of the plastic parts of the pumps.
TM05 7319 1113TM05 6989 0313
> 227 litres
(50 gallons)
English (GB)
5
Use 22 mm pipework to and from the pump.
• The expansion pipe from the hot-water cylinder should always
rise in order to prevent trapped air.
• The outlet pipework from the pump to the shower valve should
rise, where possible, to prevent trapped air.
• Pipework from the pump to the shower valve should go up and
over, rather than under floor.
• Do not fit any other outlets in the inlet pipes to the pump.
See fig. 12.
• Use dedicated supplies to hot and cold water.
• Avoid blanked-off pipes.
• Avoid restrictions in the flexible hoses.
• Secure down all pipework to minimise noise and vibration.
Fig. 11 Fixing the pipework
Fig. 12 Pipe installation examples
3.2.1 Hot-water cylinder connections
Connect the supply from the hot-water cylinder to the pump with a
dedicated supply.
Fit a surrey flange to minimise air in the hot-water supply to the
pump.
Use 22 mm pipe to ensure an adequate flow to the pump.
3.2.2 Cold-water supply
Connect the pump with a dedicated supply using 22 mm pipe
from the cold-water storage tank.
3.3 Cold-water storage tank
Position the cold-water outlet at least 25 mm lower than the
supply to the hot-water cylinder to prevent the supply of hot water
only.
The cold-water storage tank must be equal to or larger than
227 litres (50 gallons).
Fig. 13 Cold-water storage tank
3.4 Valves and strainers
Non-return valves
Do not fit non-return valves in the inlet pipework to the pump.
Fig. 14 Correct fitting of non-return valves
Isolating valves
Fit full-bore isolating valves in the pump inlet and outlet ports for
easy installation, servicing and cleaning of strainers.
Fig. 15 Fitting of isolating valves
TM05 6974 0313TM05 6972 0313
Caution
Do not use any jointing compounds.
Caution
Do not connect the pump directly to the water
mains supply.
Do not use any jointing compounds or tape.
> 227 litres
(50 gallons)
Note
Do not position outlets in the cold-water storage
tank directly below the inlet from the water mains
supply in order to prevent air from being drawn
into the pump or hot-water cylinder.
TM05 6966 4614TM05 7323 1213
Note
Isolating valves assist draining down, strainer
cleaning and refilling.
TM05 7323 1213
Min. 25 mm
> 227 litres
(50 gallons)
Supply to hot-water
cylinder
Cold water
Mains
English (GB)
6
Strainers
Fit the strainers supplied with the STC, STR, SSR, STL and SSL
on the inlet connections. See fig. 16.
1. Fit the strainer washer to the inlet connection.
2. Fit the plain hose washer to the outlet connection.
Fig. 16 Fitting the strainer washer
3. Insert the strainer basket supplied with the SSN, SSP, STN
and STP in the inlet pipe.
Fig. 17 Fitting the strainer basket
3.5 Connecting the pump
Use the flexible hoses supplied for connecting the pump to the
pipework. Use of these hoses will ensure strain- and vibrationfree watertight connections.
Fig. 18 Connecting the flexible hoses
Line up the pipework and fit hoses to the pump before connecting
to pipes.
Plastic nuts should be finger-tight plus 1/4 turn. Re-tighten the
nuts after hot water has been pumped for the first time.
Fig. 19 Tightening the connections
Push-fit connections (SSN, SSP, STN and STP pumps)
Use the flexible hoses supplied with the pump for the pump inlet
and outlet ports.
Insert the hose connection to a minimum depth of 33 mm.
Fig. 20 Installation with push-fit connection
Disconnecting the hose
To disconnect the "push-fit" hose, firmly push down the retaining
ring while pulling out the hose.
Fig. 21 Disconnecting of flexible hoses with push-fit
connection
TM05 7320 1113TM05 7321 1113
Caution
Do not use any jointing compounds or tape.
Caution
Ensure unrestricted flow in the flexible hoses.
TM05 7302 0913 - TM05 7303 0913
Caution
The pump must not be subject to mechanical
strain.
TM05 7304 0913TM05 7305 0913TM05 7306 0913
Max. 45
0
90
0
+
33 mm
1
2
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