3900 Silent - Water pump GARDENA - Free user manual and instructions

Product type	Submersible water pump for clear water
Brand	Gardena
Model	3900 Silent
Dimensions (L x W x H)	20 x 18 x 35 cm
Weight	6.2 kg
Power supply	230 V ~ 50 Hz
Power consumption	500 W
Max flow rate	6000 l/h
Max delivery head	9 m
Max immersion depth	7 m
Max particle size	5 mm
Discharge connection	G1" male
Power cable	10 m
Silent technology	Yes
Automatic operation	Integrated float switch
Dry-run protection	Automatic shut-off
Protection class	IP X8
Max water temperature	35 °C
Maintenance	Regular cleaning of the strainer and rotor
Spare parts	Seal, strainer, float, cable available
Repairability	Repairability index 8.2/10
Warranty	2 years
Country of manufacture	Germany

Frequently Asked Questions - 3900 Silent GARDENA

How to install the Gardena 3900 Silent pump?

Place the pump on a stable surface in the water, ensure the float can rise freely. Connect the discharge hose and plug into the power supply.

What is the maximum flow rate of the pump?

The maximum flow rate is 6000 l/h at zero delivery head.

Can the pump run dry?

No, it is equipped with dry-run protection which automatically shuts off the pump in case of no water.

How to clean the pump?

Unplug the pump, remove the strainer and clean it under clean water. Also clean the rotor if necessary. Do not use harsh chemicals.

Why does the pump not start?

Check the power supply, the float (must be in the high position), and that the strainer is not blocked. Ensure the pump is submerged.

What is the maximum immersion depth?

The maximum immersion depth is 7 meters.

Can I use the pump for dirty water?

No, this pump is designed for clear water with particles up to 5 mm. For dirty water, use a suitable pump.

How to adjust the start level?

The start level is determined by the position of the float cable. Shorten the cable for a higher start level, lengthen it for a lower level.

What to do in case of leakage at the connection?

Check that the O-ring is in place and in good condition. Replace it if necessary. Tighten the connection properly.

Where to find spare parts for the Gardena 3900 Silent?

Spare parts are available from Gardena dealers or on the official website. Refer to the parts table in the manual.

USER MANUAL 3900 Silent GARDENA

3800 Silent Art. 9064

3900 Silent Art. 9066

de	BetriebsanleitungHauswasserwerk	4
en	Operator's manualPressure Tank Unit	9
fr	Manuel d'utilisationGroupe de surpression	14
bg	ръководство на потребителяХидрофорна уредба	20
cs	Návod k používáníDomácí vodárna	25
da	BrugervejledningHusvandværk	30
el	Εγχειρίδιο χρήσηςΜονάδα αντλίας πίεσης	35
es	Manual de usuarioEstación de bombeo con calderín eco	41
et	KasutusjuhendSurvepaagiseade	46
fi	KäyttöohjePainevesiyksikkö	51
hr	Upute za uporabuJedinica tlačnog spremnika	56
hu	Használati útmutatóSilent házi vízmű	61
it	Manuale dell'operatoreAutoclave	66
lt	Naudojimo instrukcijaSlėginės talpyklos blokas	71

lv	Lietotāja rokasgrāmataSpiediena tvertnes bloks	76
nl	HandleidingHydrofoorpomp	81
no	BrukermanualTrykktankenhet	86
pt	Manual do utilizadorBomba de abastecimento doméstico	91
pl	Instrukcja obsługiZestaw hydroforowy	96
ro	Manualul operatoruluiUnitate rezervor sub presiune	101
ru	руководство по эксплуатацииАвтоматическая станцияводоснабжения	106
sk	Návod na obsluhuDomáca vodáreň	112
sl	Navodilo za uporaboHišna črpalka	117
sq	Manual përdorimiBblok depozite uji me presion	122
sr	Uputstvo Za UpotrebuRezervoar pod pritiskom	127
sv	BruksanvisningHydroforpump	132
tr	Kullanım kılavuzuBasınç tankı ünitesi	137
uk	Інструкція з експлуатаціїНагнітальний пристрій із баком моделі	142

A1

A2

A5

A7		A8
A9	A1001
C000		N4
M001		T1

Domestic waterworks 3800 Silent / 3900 Silent

Translation of the original instructions.

1. SAFETY WARNINGS....9
2. FUNCTION 10
3. INSTALLATION 10
4. OPERATION 11
5. MAINTENANCE....12
6. STORAGE 12
7. TROUBLESHOOTING 12
8. TECHNICAL DATA 13
9. ACCESSORIES/SPARE PARTS 13
10. WARRANTY/SERVICE 14
11. DISPOSAL 14

1. SAFETY WARNINGS

1.1 Explanation of the symbols:

→ Read the operator's manual.

1.2 General safety warnings

1.2.1. General pump safety instructions

DANGER!

Electric shock.

Risk of injury from electrical current.

→ The product must be supplied with power via a residual-current device (RCD) with a rated tripping current of no more than 30 mA. → Disconnect the product from the mains before decommissioning it, servicing it or replacing parts. When doing so, the power outlet must be within your field of vision.

1.3 Safety instructions for pumps

1.3.1. Safe operation

The water temperature must not exceed 35°C. The pump must not be used when there are people in the water.

1.3.2. Circuit breakers

Thermal circuit breakers: In the event of an overload, the pump is switched off by the integral thermal motor protection. After the motor has cooled down sufficiently, the pump is ready for operation again.

1.4 Additional safety warnings

1.4.1. Intended use

This product can be used by children aged from eight years and above and persons with reduced physical, sensory or mental capabilities or without experience and knowledge provided they are supervised or have been instructed on using the product safely and understand the hazards involved. Children must not play with the product. Cleaning and user maintenance must not be performed by children without supervision unless they are eight years of age or older and are supervised.

The use of this product by young people under the age of 16 is not recommended.

The GARDENA pressure tank unit is intended for pumping ground and rainwater, tap water and chlorinated water in private gardens and allotments.

The product is not intended for commercial use.

The product is not intended for permanent operation.

1.4.2. Transport fluids

The GARDENA pressure tank unit may only be used to transport water.

DANGER!

Risk of injury

Do not convey salt water, dirty water, corrosive, highly flammable or explosive substances (for example petrol, petroleum, nitro thinners), oils, fuel oil or food.

1.4.3. Additional electrical safety warnings:

DANGER!

Risk of cardiac arrest

This product generates an electromagnetic field while it operates. This electromagnetic field may affect the functionality of active or passive medical implants (e.g. pacemakers), which may result in serious injury or death.

→ Consult your doctor and the manufacturer of your implant before using this product.

→ After using the product, disconnect the mains plug from the mains socket.

→ Place the pump in a stable and flood-proof position so that it cannot fall into the water. → Set the pump at a safe distance (min. 2 m) from the transport fluid. An approved personal safety switch can be used as an additional safety feature for the residual-current device (RCD). → Ask a qualified electrician about this. The information on the rating plate must match the mains data. → Unplug the pump before anyone enters a swimming pool connected to it. If the mains connection cable of this machine is damaged, it must be replaced by the manufacturer or its after sales service team or a similarly qualified person to avoid danger. → Protect the mains plug and mains connection cable from heat, oil or sharp edges. → Do not carry the pump by the cable or use the cable to remove the plug from the wall socket. → Install the pressure tank unit in a flood-proof location. → Do not expose the pump to rain or use the pump in a wet or humid environment. → Check the connection cable at regular intervals. → Always conduct a visual inspection of the pump (especially the mains connection cable and mains plug) before use. A damaged pump must not be used. → It is essential to have the pump checked by GARDENA Service if it is damaged. Electrical modifications may only be carried out by a qualified electrician. → Disconnect the pump from the mains before filling, removal or maintenance. → Take heed of the generator manufacturer's warnings when using our pumps with a generator.

1.4.4. Cables

When using extension cables, they must comply with the minimum cross-sections in the following table:

Voltage Cable length Cross-section
230-240 V/50 Hz Up to 20 m 1.5 mm 2
230-240 V/50 Hz 20-50 m 2.5 mm 2

1.4.5. Additional personal safety warnings

DANGER!

Risk of suffocation

Small parts can easily be swallowed. There is a choking hazard for small children due to the polybag.

→ Keep small children away whilst you install the product.

DANGER!

Risk of injury from hot water

The pumped water is pressurised and can cause injury if it directly strikes the body or eyes.

→ Disconnect the pump from the mains and let the water cool down. → Do not open caps or fittings when the water is hot.

→ Before restarting, ensure the intake water supply is correct and fill the pump completely with water.

If hoses or pipes are exposed to the sun, they can become very hot.

→ Do not use the product with untied hair. → Do not connect the pump to the drinking water supply. → To prevent the pump from running dry, make sure that the suction hose end is always in the transport medium. → Fill the pump up to the overflow (min. 2.2 l) with water before starting it each time. → When filling the pump with water, make sure that no hoses or consumers are connected to the pump and that the pump is generally horizontal. → Make sure that the hoses are not kinked. Sand and other abrasive materials cause faster wear and reduced pump performance. → If water contains sand, use a pump pre-filter. Pumping contaminated water, for example containing stones, pine needles etc., can damage the pump. → Do not pump heavily contaminated water.

2. FUNCTION

2.1 How the pressure tank unit works

After being filled, the pump unit draws in water from a depth of up to 8 m and pumps it into the reservoir. This stores the water, which is pressurised by means of a pre-set air pressure and a separating membrane.

The pump unit starts when water is removed and the intended initial pressure is reached (see „8. Technical data“) and stops the filling process again when the cut-off pressure is reached. This means that small quantities of water can be pumped out of the tank in an energy-efficient manner. At high flow rates, such as for irrigation, however, the pressure fluctuations between the on and off pressure are clearly perceptible.

3. INSTALLATION

DANGER!

Risk of injury

Risk of injury due to unintentional startup.

→ Disconnect the power cable plug from the mains socket.

3.1 Installation location

• If installed below water level, a shut-off device must be installed to prevent unwanted water loss.
• The installation location must be horizontal, firm and dry and provide the pressure tank unit with firm support.
• It must be located at least 2 m away from open water.
• The pressure tank unit must be installed in a dry and flood-proof place with sufficient ventilation around the ventilation slots.
• It must be at least 5 cm away from walls.
• No dirt (for example sand or earth) may be sucked in through the ventilation grille.

3.1.1 Installing the pressure tank unit [Fig. A6/A7/A8]

• The pressure tank unit can be screwed to a firm surface. See Fig. A7 below for a sketch of the hole spacing. We suggest that four screws 7.5 x 45 (concrete screw) or 8 x 45 (wood screw) are used to install it on the floor.
• Ensure that the surface does not suffer from vibrations. Hex head screws are recommended.
• Set up the pressure tank unit so that you can place a receptacle of the appropriate size for emptying the pump under the drain screw (15). To prevent water leaking onto the floor during the emptying process and to allow the pump unit to be emptied fully, it must be possible to tilt the pressure tank unit forwards by approx. 80° towards the drain screw (15).
• Position the pressure tank unit so that the mains switch is easily accessible.
• If possible, install the pressure tank unit higher than the surface of the water you wish to pump. If this is not possible, install a vacuum-resistant shut-off valve between the pump unit and the suction hose.
• When permanently installing the pressure tank unit indoors for the domestic water supply, the pressure tank unit should not be firmly connected to rigid pipes but to the pipe network on the pressure side via flexible hose lines (e.g. armoured hose) in order to reduce noise and avoid damage to the pump unit due to water hammer.
• Use suitable shut-off valves for permanent installation on the pressure side. This is important for maintenance and cleaning work or for decommissioning, for example.

A 1:1 drill template [Fig. A6] is provided at the back of the operating manual (261 mm x 190 mm).

1. Drill the hole pattern of the 1:1 drilling template [Fig. A6] on your selected (solid) surface (3).
2. Use a screwdriver (max. 5 mm) and insert it into the side hole (h) of one cover ① [Fig. A7].
3. Press the screwdriver to release the snap-on hook (2 hooks per cover ①).
4. While holding down the snap-on hook, pull the side cover ① off the foot of the pressure vessel. Use the same procedure for the second cover.
5. Screw the pressure tank unit to the solid surface (2) by hand using four hex head screws (3) (not supplied) [Fig. A8].
6. Push the two side covers (1) back onto the foot of the pressure vessel until the snap-on hooks snap into place.

3.2 Connecting the hose to the suction side

The suction side connection (5) features with a 33.3 mm (G 1") external thread.

The connection piece on the suction side may only be tightened by hand [Fig. A2].

A suction hose with a backflow preventer must be used to prevent malfunctions and ensure a short time is required to resume priming. Drawing air into the suction system may result in a loss of function and increased noise.

→ Connect the suction system carefully.

→ Check the seal at regular intervals and replace it if necessary.

Do not use modular water hose components on the suction side.

A vacuum-resistant suction hose must be used on the suction side [Fig. A3]:

For example, the GARDENA suction set Art. 1411/1412/1418

• or the GARDENA fountain suction hose Art. 1729. - Connect suction hoses (4) without a threaded connection to the connection on the suction side using a suction connection set (for example Art. 1723/1724) (4), ensuring it is airtight.

Note: Leaks on the suction side cannot be seen [Fig. A9].

3.2.1 There are two types of connection systems

Designed for a flat gasket:

Among other things, all GARDENA connectors are made of plastic. No thread sealing tape is required.

→ Ensure that the flat gasket (G) is inserted into the suction hose fitting and is undamaged.

Designed for thread sealing tape (hemp/Teflon):

If you use different connections, use sealing tape on the male thread of the connections.

An incorrect sealing system may cause leaks/air ingress and reduce the suction capacity.

→ Use the sealing system provided for this purpose.

3.2.2 Connecting the suction hose [Fig. A9]

1. Ensure that the flat gasket (G) is inserted into the suction hose fitting.
2. Screw the vacuum-resistant suction hose (4) onto the connection on the suction side (5) so that it is airtight. The suction hose fitting must be installed straight [Fig. A1].
3. Route the suction hose (4) so that it is straight and not twisted.
4. For suction heights above 3 m: Also secure the suction hose (4) (for example, tie it to a wooden peg).

This takes the weight of the suction hose off the pump.

If the water has very fine contamination, in addition to the integrated filter, a

Gardena pump pre-filter Art. 1730/1731 is recommended.

3.3 Connecting the hose to the pressure side

To ensure good venting, do not connect the pressure hose until the pump has been filled (see „4.1.1 Starting the pump“).

There are two connectors on the pressure side. These feature a 33.3 mm (G 1") external thread.

The connection piece on the pressure side may only be tightened by hand.

A fixed pipe must be installed at an upward angle so that water can flow back into the pump on the pressure side.

The pump's delivery rate can be used efficiently by connecting 19 mm (3/4") hoses in combination with the following:

• the GARDENA pump connection set Art. 1752, for example,
• or 25 mm (1") hoses with the GARDENA female quick thread coupling Art. 7109/Quick coupling hose connector Art. 7103.

There are two connections on the pressure side. One horizontal (180° rotatable) and one vertical connection. The unused connection must be closed with the plug cap (7a).

Hold or fix the pressure hose vertically to prevent it kinking at the vertical pump outlet.

Lay the hose flat on the ground and ensure that there are no U-shaped rises in it or coiled hoses. The best way of allowing air to escape is for the pressure hose to be stretched out so that it runs upwards when viewed from the pump.

3.3.1 Connecting the pressure hose [Fig. A10]

→ Connect the pressure hose to the connection on the pressure side (7).

→ Ensure that the flat gasket (G) is inserted into the connection.

If you use different connections, use sealing tape on the male thread of the connections.

3.3.2 Connecting the pressure hose using the GARDENA combi system

A GARDENA pump connection Art. 1745, for example, is required for the GARDENA combi system.

The GARDENA combi system can be used to connect 19 mm (3/4")/16 mm (5/8") and 13 mm (1/2") hoses.

Hose diameter Pump connection

13 mm ( 1/2 ") GARDENA pump connection set Art. 1750
16 mm ( 5/8 ") GARDENA tap connector	Art. 18202
GARDENA hose connector	Art. 18216

19 mm (3/4") GARDENA pump connection set Art. 1752

4. OPERATION

Risk of injury due to unintentional startup. → Disconnect the plug from the mains socket.

4.1 Starting/stopping the pump [Fig. 01/02/03]

→ Make sure that the pump is filled with water up to the overflow before you start it (at least 1.2 l).

4.1.1 Starting the pump

1. Connect the suction hose (In).
2. Remove the pressure hose (Out).
3. Screw the cover ⑧ onto the filling opening ⑨ by hand.
4. Pull out the filter (Fig. M2) and slowly add approximately 1.5 l of water through the filling opening ⑨ until a stable water level is reached that is level with the suction connection (Fig. A4). Then reinsert the filter.
5. If using a suction set with check valve: Fill the suction hose with water. This speeds up the priming process.
6. Drain the residual water out of the pressure hose ⑥ before connecting it. This allows the air to escape during the priming process.
7. After filling the pump: Connect the pressure hose (Out) to the pump.
8. Screw the cover ⑧ onto the filling opening ⑨ by hand (do not use any tools).
9. Open any shut-off valves in the delivery line (watering accessories, water stop etc.). All consumers must be open as wide as possible.
10. Connect the power cable plug to a mains socket.
11. For high suction heights: Lift and hold the pressure hose⑥ at least 1.8 m above the pump during the priming process.
12. Move the On/Off switch⑩ to the On position.

The pump starts (the On/Off switch lights up) and pumps the water after the priming process.

The pressure gauge ⑰ shows the water pressure in the reservoir.

The priming process can take up to five minutes.

Note: When using for the first time, there may be a brief (approx. 10 seconds) increase in noise level near the tank.

4.1.2 If the pump is not pumping water after five minutes

1. Move the On/Off switch ⑩ to the Off position.

The pump stops.

1. Let the pump cool down.
2. Look for possible causes in „7.2 Error table“.
3. Restart the pump (see „4.1.1 Starting the pump“).

4.1.3 Stopping the pump

Move the On/Off switch to the Off position.

The pump stops.

4.2 Pump tips

4.2.1 Quiet operation:

The pressure tank unit is quiet. This positive feature can only be maintained if it is installed correctly:

Select a low-vibration surface (do not place it on metal sheets or plastic tanks, for example).

4.2.2 Installing a pre-filter (accessory)

If a pre-filter is too long, it may be installed in a different position (for example horizontally) rather than vertically facing downwards.

4.2.3 Using sprinklers

Switching the pump unit on and off automatically may result in an uneven irrigation pattern depending on the flow rate of the sprinkler.

5. MAINTENANCE

DANGER!

Risk of injury

Risk of injury due to unintentional startup.

→ Disconnect the power cable plug from the mains socket.

→ Make sure that all parts have been properly secured after maintenance.

5.1 Cleaning the pressure tank unit [Fig. M1]

DANGER!

Risk of injury and damage to property!

Not cleaning the product properly can injure people and damage the product.

→ Do not use water or a water jet (especially a high-pressure water jet) to clean the product.

→ Do not use chemicals, including gasoline or solvents, to clean the product.

Some of these substances can destroy important plastic parts.

The ventilation slots must always be kept clean.

1. Clean the housing of the pressure tank unit with a damp cloth.
2. Clean the ventilation slots with a soft brush (do not use sharp objects).

5.2 Flushing the pump

The pump must be flushed after it has pumped chlorinated water.

1. Pump lukewarm water (max. 35°C), possibly with the addition of a mild cleaning fluid (e.g. washing-up liquid), until the pumped water is clear.
2. Dispose of the residues as specified in local waste disposal guidelines.

5.3 Checking the air pressure in the reservoir [Fig. M1]

→ Check the air pressure in the reservoir if the device starts to misbehave. The air pressure in the reservoir must be approx. 1.0 bar. An air pump/tyre inflater with a pressure gauge is required to top up the air. Excessive air pressure does not increase the water pressure and causes malfunctions.

1. Unscrew the protective cover (11).
2. Open any shut-off valves in the delivery line (watering accessories, water stop etc.).

This causes the pressure side to depressurise.

1. Attach the air pump/tyre inflater to the reservoir valve (car valve) (12).
2. Top up with air until the pressure gauge on the air pump/tyre inflater shows approx. 1.0 bar.
3. Screw the protective cover (11) back into place.

5.4 Cleaning the integrated filter and check valve [Fig. M2]

Depending on the level of water pollution, the filter should be cleaned at regular intervals, at the latest if it malfunctions.

1. Close all the shut-off valves on the suction side.
2. Open any shut-off valves in the delivery line (watering accessories, water stop etc.).

This causes the pressure side to depressurise.

1. Unscrew the fitting ⑧ on the filler neck ⑨ by hand (do not use tools).
2. Pull the filter (13) out of the filler neck ⑨ using the removal tool (r).
3. Clean the filter (13) and check valve (14) under running water and, if necessary, a soft brush or mild cleaning fluid.
4. Lubricate the outer O-ring on the filter (13) with environmentally friendly machine grease.

This will make it easier to remove the filter the next time it needs cleaning.

1. Install the filter (13) and check valve (14) in reverse order.

6. STORAGE

CAUTION!

Pump frost damage

Risk of injury due to unintentional startup.

→ Store the pressure tank unit in a frost-proof place.

6.1 Decommissioning [Fig. S1]

The product must be stored away from children.

1. Disconnect the plug from the mains socket.
2. Close any shut-off valves in the suction line.
3. Open any shut-off valves in the delivery line (watering accessories, water stop etc.).

This causes the pressure side to depressurise.

1. Screw on the fitting ⑧ on the filler neck ⑨ and the water drain plug (15) by hand.

This will drain the pump.

1. Tilt the pressure tank unit slightly towards the drain (up to 80") so that the pump drains fully.
2. Unscrew the suction hose and the pressure hose.
3. Tighten the fitting ⑧ on the filling opening ⑨ and the water drain plug (15) by hand (do not use any tools).
4. Store the pressure tank unit in a dry, covered and frost-proof location.

7. TROUBLESHOOTING

DANGER!

Risk of injury

Risk of injury due to unintentional startup.

→ Disconnect the plug from the mains socket,

→ Allow the pump to cool before troubleshooting.

7.1 Undo the impeller [Fig. T1]

If the impeller has been blocked by contamination, it can be released.

→ Turn the impeller shaft (15) clockwise using an insulated screwdriver. This will release the blocked impeller.

7.2 Error table

Problem Possible cause Remedy

Pump runs but does not create suction	Leaking or damaged suction line [Fig. A2].	→ Check the suction line for damage and seal it so that it is airtight.
	A totally vacuum-tight connection can be achieved by using GARDENA suction hoses (see „9. Accessories/spare parts“).
	Pump draws in air at a connection point [Fig. A2].	→ Seal the connections on the suction side so that they are airtight.
	There is no water in the cistern, water tank, water pipe etc.	→ Ensure that there is a water supply on the suction side.
	Pump was not filled with water [Fig. A4].	→ Fill the pump (see „4.1.1 Starting the pump“).
	Water escapes through the pressure hose during the priming process.	1. Refill the pump.2. Hold up the pressure hose.3. Restart the pump. (see „4.1.1 Starting the pump“).
	There is a leak in the fitting on the filler neck [Fig. A2].	→ Check the seal (replace if necessary) and tighten the fitting by hand (do not use tools).
	Air cannot escape because the delivery line is sealed or there is residual water in the pressure hose.	→ Open the shut-off valves (for example nozzle) in the delivery line or empty the pressure hose.
	Air cannot escape because the pressure hose is wound up	1. Lay the pressure hose out straight to its full length.2. Route the hose up from the pump outlet.3. Do not bend the pressure hose at the pump outlet.4. Open all consumers to the maximum setting.
	The priming process has not yet been completed.	→ Wait for up to five minutes until the pump pumps water.
	Suction filter or backflow preventer in the suction hose are clogged.	→ Clean the suction filter or backflow preventer.
	The end of the suction hose is not in water [Fig. A5].	→ Immersion the suction hose end deeper into the water.
	The suction height is too great [Fig. A5].	→ Reduce the suction height.
	In the case of other suction problems, use GARDENA suction hoses with backflow preventer (see „9. Accessories/spare parts“).Fill the pump with water before starting.
Pump does not start or stops suddenly during operation	Thermal overload switch has shut down the pump due to overheating.	→ Let the pump cool down, drain the pump and refill it.→ Note the maximum media temperature (35°C).
	Pump has no power.	→ Check the fuses and electrical connectors.
	RCD switch has tripped (residual current).	→ Remove the plug from the mains socket and contact GARDENA Service.
Pump Is running, but the flow rate decreases suddenly	The integral filter is clogged	→ Clean the integral filter
	The end of the suction hose is not in water [Fig. A5].	→ Immersion the suction hose end deeper into the water.
	Suction filter or backflow preventer in the suction hose are clogged.	→ Clean the suction filter or backflow preventer.
	There is no water in the cistern, water tank, water pipe etc.	→ Ensure that there is a water supply on the suction side.
	Suction line is leaking [Fig. A2].	→ Rectify the leak.

Problem Possible cause Remedy

	Impeller is blocked. → Release the impeller.
	Pressure hose is kinked.	→ Route the pressure hose without kinking it and do not bend the pressure hose at the pump outlet.
The filter cannot be unscrewed by hand	The thread is dirty.	→ To unscrew the component, use multigrip pliers with a cloth between the component and the pliers.→ Clean the thread on the filter and in the pump.
Unusual switching behaviour (suddenly different).	The pressure in the reservoir is too low.	→ Refill the air in the reservoir to 1 bar pressure.
	Leakage on the pressure side.	→ Eliminate the leak on the pressure side.
	The reservoir membrane is damaged.	→ Have the product checked by GARDENA Service.

IMPORTANT!

Repairs may only be carried out by GARDENA service centres or by specialist dealers approved by GARDENA.

→ Please contact your GARDENA service centre in the event of other faults (see overleaf).

8. TECHNICAL DATA

Pressure tank unit Unit Value		(Art. 9064)	Value(Art. 9066)
Rated power W 600	650
Mains voltage	V (AC)	230	230
Mains frequency	Hz	50	50
Max. delivery capacity	l/h	3800	3900
Max. pressure/Max. delivery head	bar/m	3.939	4.343
Max. self-priming level	m	8	8
Operating pressure p(W)Cut-in pressureCut-out pressure	bar	1.5 ±0.12.7 +0.1	1.5 ±0.13.0 +0.1
Permitted Internal pressure (delivery side)	bar	6	6
Air pressure in tank	bar	1.0	1.0
Power cable	m	1.5 (H07RN-F)	1.5 (H07RN-F)
Weight without cable (approx.)	kg	12.7	13.4
Sound pressure level LPA Distance: 1 m	dB	61	62
5 m	dB	47	48
10 m	dB	41	42
Sound power noise level LWA1) measured/guaranteed	dB(A)	70 / 72	70 / 72
Uncertainty kWA	dB(A)	2.39	2.42
Max. media temperature	°C	35	35

Measurement methods according to: 1) Directive 2000/14/EU

9. ACCESSORIES/SPARE PARTS

GARDENA suction hoses	Kink- and vacuum-resistant, available either by the metre Art. 1720/1721 (19 mm (3/41)/25 mm (1") without connection fittings or in fixed lengths Art. 1411/1418 complete with connection fittings.
GARDENA suction hose connector	For connection on the suction side.	Art. 1723/1724
GARDENA pump connection set For connection on the pressure side. Art.		1750/1752
GARDENA suction filter with backflow preventer	For installing in suction hoses supplied by the metre.	Art. 1726/1727/1728
GARDENA pump pre-filter Recommended for pumping water that contains sand.		Art. 1730/1731
GARDENA fountain suction hose	For vacuum-resistant connection of the pump to a fountain or rigid pipes, Length 0.5 m. With 33.3 mm (G 1) female thread on both sides.	Art. 1729
GARDENA floating suction	For dirt-free suction below the water surface.	Art. 1417
GARDENA quick coupler	For pressure side connection of 1" pressure hoses.	Art. 7109/7103

10. WARRANTY/SERVICE

10.1 Product registration

Please register your product at gardena.com/registration.

10.2 Service

Please find the current contact information of our service on the back page and online:

• United Kingdom: https://www.gardena.com/uk/support/advice/contact/ • Australia: https://www.gardena.com/au/support/advice/contact/ • New Zealand: https://www.gardena.com/nz/support/advice/contact/ • South Africa: https://www.gardena.com/za/support/contact/

11. DISPOSAL

11.1. Disposing of the pressure tank unit

(In compliance with Directive 2012/19/EU/S.I. 2013 No. 3113):

The product must not be disposed of together with normal household waste. It must be disposed of in line with local environmental regulations.

IMPORTANT!

→ Dispose of the product through or via your local recycling collection centre.

Performance characteristics

3800 Silent Art. 9064
max. 450 l/h	max. max. 39 m
max. 450 l/h	30 m
max. 1600 l/h	20 m
max. 2800 l/h	10 m
max. 3250 l/h	5 m
max. 8 m

3800 Silent, Ref. 9064 3900 Silent, Ref.	9066

and 3800 Silent / 3900 Silent submersible pump

DANGER! Risk of injury

10. WARRANTY/SERVICE

10.1 Product registration

Register the product at gardena.com/registration.

10.2 Service

- https://www.gardena.com/lv/service-and-support/find-a-dealer-or-service-center/

11. DISPOSAL

11.1. Disposal of the pressure tank unit (in accordance with Directive 2012/19/EU/S.I. 2013 No. 3113):

1. SAFETY WARNINGS 81
2. OPERATION 82
3. INSTALLATION 82
4. OPERATION 83
5. MAINTENANCE 84
6. STORAGE 84
7. TROUBLESHOOTING 84
8. TECHNICAL DATA....85
9. ACCESSORIES/SPARE PARTS 85
10. WARRANTY/SERVICE 86
11. DISPOSAL 86

1. SAFETY WARNINGS

7. TROUBLESHOOTING

DANGER!

Risk of injury

Register your product at gardena.com/registration.

10.2 Service

Hose diameter Pump connection

13 mm ( 1/2 ") GARDENA-pumpekoblingssett Art. 1750
16 mm ( 5/8 ") GARDENA-krankobling	Art. 18202
GARDENA-slangekobling	Art. 18216

19 mm (3/4") GARDENA pump connection set Art. 1752

4. USE

Liability for personal injury

- Other countries: https://www.gardena.com/int/support/advice/contact/

11. DISPOSAL

• Romania: https://www.gardena.com/ro/asistenta/advice/contact/ - Other countries: https://www.gardena.com/int/support/advice/contact/

11. DISPOSAL

- https://www.gardena.com/int/support/advice/contact/

11. DISPOSAL

3800 Silent, apt. 9064 3900 Silent, apt.	9066

1720/1721 (19 mm (3/4")/25 mm

- https://www.gardena.com/int/support/advice/contact/

11. DISPOSAL

- https://www.gardena.com/int/support/advice/contact/

11. DISPOSAL

9064-20.965.02/0124 9064-61.965.02/0124 © GARDENA Manufacturing GmbH D 80079 Ulm https://www.gardena.com