Grundfos SSL Series Bedienungsanleitung

Shower pumps

SSL, STL, STC, SSR, STR, SSP, STP, SSN and STN

Installation and operating instructions

GRUNDFOS INSTRUCTIONS

English (GB)

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. 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)

=Hinlet

> 227 litres

(50 gallons)

English (GB)

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)

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)

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 vibration-

free 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

English (GB)

3.6 Temperature setting

Maximum hot-water temperature setting must not exceed 60 °C in

accordance with BS 6700:2006, to eliminate the risk of lime scale

and cavitation.

3.7 Installation options

This section gives you an overview of your options during

installation.

Positioning the pump

• Sufficient inlet head of at least 2 metres is required for STC,

STL and SSL pumps.

• Inlet head of at least 1 m is required for SSP, STP, SSN, STN

and STR pumps.

• Fit a downward loop of at least 450 mm if the pump is

positioned above the hot-water cylinder. See fig. 22.

Fig. 22 Pump positioned above hot-water cylinder

Pipework

• 15-mm pipework can only be used on STC, STL, SSL, STR

and SSR pumps up to 1.5 bar rated pressure.

• Where high flows are expected, we recommend 28 mm.

Electrical installation

• The low-voltage pump installation kits are supplied with

3 metres of connecting lead. The connecting leads between

the pump and the isolating transformer can be extended up to

about 15 metres. Use min. 1.0 mm2cable.

Flanges

• Either Surrey, York, Warix or Essex flanges can be used for

the hot-water cylinder, depending on the cylinder type and

installation.

4. Electrical installation

Check that the supply voltage and frequency correspond to the

values stated on the nameplate.

4.1 1 x 230 V, 50 Hz

1. Strip off the insulation cap and the leads as specified for the

switched spur.

Observe colour coding as follows:

• Brown to terminal L.

• Yellow/green to terminal E (PE).

Ensure that the earth lead is at least as long as the other two

leads.

• Blue to terminal N (neutral).

Fig. 23 Electrical connection

2. Insert the lead fully into the terminal connector and tighten the

screw firmly.

3. Ensure that the connection is secure.

4. Tighten the cable restraint.

Ensure compliance with IEE regulations.

The pump switch should be left in "on" position at all times for

normal operation of the system.

Fig. 24 Electrical supply permanently on

TM05 6975 0313

Caution

Complete all pipework before making any

electrical connections.

Do not allow any water to enter into the electrical

terminal box.

Warning

The electrical installation should be carried out

by an authorised person in accordance with local

regulations.

Warning

During electrical installation, make sure that the

power supply cannot be accidentally switched

on.

Warning

The unit must be connected to a switched spur

fused at 5 A (10 A on models STP 4.0 B and

STN 4.0 B) with a minimum contact gap of 3 mm

in all poles.

Metal pipes must be earthed by the use of

earthing clamps and 4 mm2earthing wire,

according to BS 951.

Warning

Connect the pump to a socket with earth

connection (not for models STL and SSL).

We recommend that you fit the permanent

installation with an earth leakage circuit breaker

(ELCB) with a tripping current

≤

30 mA.

TM05 7316 1013

Caution

Follow the procedure for startup before switching

on the power supply.

Warning

Fit the terminal box cover before you switch on

the power supply.

TM05 7309 0913

L N

Min. 3 mm

1 ∽

I/ON

English (GB)

4.2 Low-voltage pumps (STL and SSL)

The low-voltage pump incorporates electrical protection via a

safety isolating transformer.

Fig. 25 Connection via transformer

Place the safety isolating transformer according to local

regulations.

All transformers are fitted with auto-resetting thermal cut-outs.

Connect the low-voltage leads from the transformer to the two

terminals marked "T" in the pump terminal box.

The low-voltage pump installation kits are supplied with 3 metres

of connecting lead.

Observe the colour coding on the transformer primary side as

follows:

• Brown to terminal L.

• Blue to terminal N.

The transformer can be left permanently switched on for normal

operation. Very little power is used when the pump is not running.

Fig. 26 Electrical connection of transformer

If the transformer or transformer cables are damaged, replace the

transformer and discard the old one.

5. Startup

1. Turn on the water supply. Allow the system to fill.

2. Immediately inspect for any leaks.

Fig. 27 Inspect for leaks before operation

3. With the pump not running, allow maximum water flow, for

example remove handset from shower hose.

4. Operate maximum hot and cold flows for at least two minutes

to flush out all debris. See fig. 28.

Fig. 28 Operating hot- and cold-water taps

5. Switch on the power supply, run the pump for a few minutes,

switch off, drain down and clean the inlet strainers.

See fig. 29.

Fig. 29 Cleaning the suction strainer

For SSN, SSP, STN and STP pumps, remove the inlet hose from

the pump, and the strainer basket can be removed by hand or

with long-nosed pliers.

6. Replace the inlet strainers and reconnect the hoses.

7. Turn on the water supply. With the power supply off, allow

maximum water flow, for example remove handset from

shower hose.

Caution

Use the transformer supplied.

Do not connect the pump directly to the mains

supply.

TM05 7312 0913

Warning

Do not locate 230-240 V connections, plugs or

switches within the "wet" area in accordance

with IEE regulations.

Caution

Follow the procedure for startup before switching

on the power supply.

TM06 2664 1014

I/ON

Caution

Do not start the pump until it has been filled with

liquid.

Warning

Prior to startup, flush the system through with

clean water and drain to remove possible

impurities.

TM05 7308 0913

Note

STN, SSN, STC-1.5 CN, STC-2.0 CN, STL-2.0 CN:

The power supply should be switched on.

TM05 7307 0913TM05 7317 1013

Note

STN, SSN, STC-1.5 CN, STC-2.0 CN, STL-2.0 CN:

The power supply should be switched on.

0/OFF

2 min.

0/OFF

I/ON

10 min.

English (GB)

8. Operate maximum hot and cold flows for at least five minutes

each to ensure air is thoroughly purged from the system.

9. Replace handset on shower hose.

10. Switch on the power supply.

11. Operate the pump in both full hot and cold modes for at least

two minutes each while inspecting for leaks.

Fig. 30 Inspect for leaks after operation

12. Check that all hot-water connections are tight and not leaking,

when the hot water has been run for several minutes.

See fig. 30.

Fig. 31 Re-tighten connections after operation

The first few times the pump is used, the insulating varnish used

on the pump motor may give off an odour. This is perfectly normal

and will diminish with use.

5.1 Shaft seal run-in

The seal faces are lubricated by the pumped liquid, meaning that

there may be a certain amount of leakage from the shaft seal.

When the pump is started up for the first time, or when a new

shaft seal is installed, 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, i.e. 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.

6. Universal-head pumps

STN, SSN, STC-1.5 CN, STC-2.0 CN, STL 2.0 CN

6.1 General description

Automatic universal-head shower pumps are designed to operate

automatically in installations where the shower outlets are above

the level of the cold-water storage tank.

Shower pumps, types STN and SSN, feature independent

pressure and flow controls, with built-in non-return valves and

stainless-steel expansion tanks in each pump end. This system

ensures complete hot- and cold-water system isolation with

stable control over a very wide flow range.

Fig. 32 Definition of universal-head pumps

6.2 Dry-running protection

STN, SSN, STC CN and STL 2.0 CN universal-head pumps

feature dry-running protection to avoid damage to seals caused

by water starvation. This condition is possible if the water supply

fails, for instance if the water storage is insufficient or the pump

strainers are blocked.

If the pump runs for 60 seconds with an insufficient water supply,

the pump will stop and "lock out".

Fig. 33 Dry-running protection

Resetting the "lock out"

To reset the pump, switch off the power supply for ten seconds.

Fig. 34 Resetting dry-running protection

When the power supply is switched on again, the pump will run

for a few seconds to recharge the tanks. If it continues to run and

there is no demand, this would indicate that one of the following

situations is still present:

• No water in the system.

• Blocked strainer.

• Air which has not yet cleared.

TM05 7309 0913TM05 7311 0913

Note

Run the pump for five minutes or more at least

once every four weeks in order to prevent the

pump from seizing up. Scale build-up can cause

the pump parts to stick.

I/ON

2 min.

TM05 7313 4614TM05 7314 0913TM05 7315 0913

Caution

Continued dry running will lead to overheating of

the shaft seals and eventually to a water leak.

> 227 litres

(50 gallons)

60 sec.

ON OFF

I/ON

0/OFF

10 sec.

RESET =

English (GB)

6.3 Connecting the pump

• Follow general instructions in section 3. Installation.

• Minimum head of water to supply the pump can be found on

the nameplate.

• Maximum static head of 8 metres, i.e. the highest point of the

system must be less than 8 metres above the pump.

See fig. 35.

Fig. 35 Maximum static head

• Connect the pump side with the larger expansion tank to cold

water and the pump side with the smaller expansion tank to

hot water.

Fig. 36 Expansion tanks

6.4 Operating instructions

Taps and valves used on the "pressure system" must be fully

turned off when not in use to avoid that the pump runs

reciprocating on and off.

6.5 Installation options

Lavatory cisterns

If the pump is to supply a lavatory cistern, take the precautions

below to avoid frequent starting and stopping of the pump due to

low flow rates.

If possible, best practice is to supply the cistern from the mains

water supply. If this is not possible, we recommend a "Torbeck" or

equilibrium valve. If either of these are not possible, the following

instructions should be followed:

• A: The pump is supplied with two expansion or pressure tanks.

They have capacities of 500 ml and 300 ml.

The larger tank must be used on the cold side of the pump.

• B: The cistern-filling pipework must be as free-flowing as

possible with all flow restrictors removed.

It is possible to change the tanks from one side of the pump to

the other. When doing so, take care to ensure that none of the

fibre washers are lost.

Washer dryers

• Only brass pumps must be used for these applications.

7. Technical data

Ambient temperature

Maximum 40 °C.

Storage temperature

Minimum -20 °C.

Maximum 70 °C.

Liquid temperature

See pump nameplate.

Minimum starting flow rate

0.5 l/min

Rated current

See pump nameplate

Insulation class

155 (F).

Enclosure class

IPx2.

Relative air humidity

Maximum 95 %.

Sound power level

The sound power level of the pump is lower than 70 dB(A).

Start/stop frequency

Maximum 100 per hour.

Maximum system pressure [bar]

Inlet head [m]

See pump nameplate.

Maximum developed pump head [m]

See pump nameplate.

Supply voltage

Rating

* Recommended minimum flow rate: 5 l/min.

** At flow rates between 5 and 20 l/min.

TM05 7310 0913TM05 7314 0913

Max. 8 m

60 sec

Hot-water

expansion tank

Cold-water

expansion tank

STP, SSP: 6.

STC: 3.

STL, SSL: 3.

STR, SSR: 3.

STN, SSN: 6.

STP, SSP: 1-20.

STC: 2-10.

STC CN: 2-8.

STL, SSL: 2-10.

STL 2.0 CN: 2-8.

STR, SSR: 1-10.

STN, SSN: 1-8.

STP, SSP: 13-41.

STC: 15-20.

STL, SSL: 9.5 - 19.5.

STR, SSR: 12-16.

STN, SSN: 21-41.

STP, SSP: 1 x 230 V, 50 Hz.

STC: 1 x 230 V, 50 Hz.

STL, SSL: 1 x 230 V, 50 Hz (for transformer) (transformer

output 29-39 VDC, see nameplate).

STR, SSR: 1 x 230 V, 50 Hz.

STN, SSN: 1 x 230 V, 50 Hz.

STP, SSP*: Continuous operation.

STC*: 20 min. on, 40 min. off.

STL, SSL**: 30 min. on, 30 min. off.

STL 1.0 C): 20 min. on, 40 min. off.

STR, SSR*: 20 min. on, 40 min. off.

STN, SSN*: Continuous operation.

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