Gardena 3800 Silent Manuel D'utilisation page 11

• 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 decom-
missioning, 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 [Fig. A7].
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3. Press the screwdriver to release the snap-on hook (2 hooks per
cover ).
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4. While holding down the snap-on hook, pull the side cover
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.
Æ Connect the suction system carefully.
Æ 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 connec-
tion 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.
Æ 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.
Æ 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 cou-
pling Art. 7109/Quick coupling hose connector Art. 7103.
There are two connections on the pressure side. One horizontal (180° rotat-
able) 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.
off the foot
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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]
Æ Connect the pressure hose
Æ 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
13 mm (¹⁄₂")
16 mm (⁵⁄₈")
19 mm (³⁄₄")
4. OPERATION
DANGER!
Risk of injury
Risk of injury due to unintentional startup.
Æ Disconnect the plug from the mains socket.
4.1 Starting/stopping the pump [Fig. O1/O2/O3]
CAUTION!
Dry running of the pump unit
Æ 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
4. Pull out the filter (Fig. M2) and slowly add approximately 1.5 l of water
through the filling opening
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
This allows the air to escape during the priming process.
7. After filling the pump: Connect the pressure hose (Out) to the pump.
to the connection on the pressure side (7).
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Pump connection
GARDENA pump connection set
GARDENA tap connector
GARDENA hose connector
GARDENA pump connection set
onto the filling opening by hand.
8 9
until a stable water level is reached that is
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before connecting it.
6
Art. 1750
Art. 18202
Art. 18216
Art. 1752
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