Stationary Dry Well Installation - Wilo Rexa PRO Serie Instrucciones De Instalación Y Funcionamiento

6.4.5

Stationary dry well installation

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Fig. 7: Dry well installation
Installation and operating instructions Wilo-Rexa PRO
Installation and electrical connection
4. Lay the pressure hose and fasten it to a certain point (e.g. drainage). DANGER! Separa-
tion or movement of the pressure hose can lead to (serious) injury! Attach pressure
hose securely to the outlet.
5. Correctly route power supply cable. CAUTION! Do not damage power supply cable!
▶ Pump is installed, the qualified electrician can carry out the electrical connection.
WARNING
Danger of burning due to hot surfaces!
The motor housing can get hot during operation. It can lead to burns. Allow the pump to
cool down to ambient temperature after switching off!
NOTICE
Pumping problems due to water level being too low
The hydraulics are self-venting. Smaller air cushions are resorbed during pumping. If the
fluid is lowered too much, separation of the volume flow may occur. The minimum per-
missible water level must reach up to the upper edge of the hydraulics housing!
In dry well installation, the operating space is divided into the collecting space and the ma-
chine room. In the collecting space, the fluid flows and is collected, the pump technology is
installed in the machine room. The pump is installed in the machine room and connected to
the pipe system on the suction and pressure side. Observe the following points for installa-
tion:
▪ The suction- and pressure-side pipe system must be self-supporting. The pump must not
support the pipe system.
▪ Connect the pump to the pipe system ensuring that it is free of stress and vibrations. The
use of elastic connection pieces (compensators) is recommended.
▪ The pump is not self-priming, in other words, the fluid must flow in either automatically or
with supply pressure. The minimum level in the collecting space must be at the same height
as the upper edge of the hydraulics housing!
▪ Max. ambient temperature: 40 °C (104 °F)
CAUTION! In dry well installation, comply with the operating mode "non-immersed" (S1,
S2-30, S3 25 %)! If "non-immersed" operating mode is not specified, dry well installa-
tion is not possible!
1 Pressure pipe
2 Pressure pipe gate valve
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3 Non-return valve
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4 Expansion joint
5 Inlet gate valve
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6 Inlet pipe
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7 Collecting space level detection
8 Collecting space
9 Machine room
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Machine room/installation location is prepared for the installation.
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Pipe system has been properly installed and is self-supporting.
1. Attach lifting equipment to the attachment point of the pump with a shackle.
2. Lift the pump and position it in the machine room.CAUTION! Hold the power supply
cables slightly taut when positioning the pump!
3. Fasten pump to the foundation properly.
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