Wilo Actun OPTI-QS Series, Installation And Operating Instructions Manual

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Installation and operating instructions Wilo-Actun OPTI-QS... 53
PRODUCT DESCRIPTION English
4.1.1. Hydraulics
The pump is not self-priming, i.e. the fluid must flow in either automatically or with
supply pressure and the minimum submersion (2.5 m) must be ensured at all times.
Actun OPTI-QSI
Multistage hydraulics with radial impellers in sectional construction. The hydraulics
housing, the pump shaft and the impellers are made of stainless steel. The connection
on the pressure side is designed as a vertical threaded flange with a female thread and
integrated non-return valve.
Actun OPTI-QSH
Progressive cavity pump featuring eccentric screw within a double-helix rubber stator.
The hydraulics housing, the pump shaft and the eccentric screw are made of stainless
steel. The connection on the pressure side is designed as a vertical threaded flange with
a female thread and integrated non-return valve.
4.1.2. Motor
The drive unit is a stainless, encapsulated permanent magnet motor featuring integ-
rated frequency converter. The permanent magnet motor has been cast hermetically
featuring coiling insulated by paint, it has been resin-impregnated and features self-
lubricating bearings.
The motor is cooled by the pumped fluid. Therefore, the motor must always be operated
immersed. The limit values for maximum fluid temperature and minimum flow velocity
must be adhered to.
The integrated frequency converter enables operation with DC power sources. Conse-
quently, the Actun OPTI-QS pump is particularly suitable for operation with solar power.
In applications with solar modules the integrated MPPT (Maximum Power Point Tra-
cking) algorithm enables an adaption to the available power to maximize the pumped
flow rate (dynamic MPPT).
The connection cable has bare cable ends, is longitudinally watertight and is connected
to the motor by a detachable plug.
4.1.3. Motor filling
The motor has been filled ex works with a water-glycol mixture. This filling guarantees
that the pump is frost-proof at temperatures down to -20 °C.
The motor is designed in such a way that it cannot be filled from outside. The manufac
-
turer alone can fill the motor.
4.1.4. Seal
A mechanical seal has been installed between motor and hydraulics.