Product Description; Design - Wilo -Rexa FIT Instrucciones De Instalación Y Funcionamiento

DANGER
Danger due to fluids hazardous to health!
If the pump is used in fluids hazardous to health, de-
contaminate the pump after dismantling and before
carrying out any other work! There is a risk of fatal in-
jury! Observe the specifications in the work regula-
tions! The operator must make sure that the person-
nel have received and read the work regulations!
The submersible pumps must not be used for pumping:
▪ Drinking water
▪ Fluids containing hard components (such as stones,
wood, metal, etc.)
▪ Fluids containing large quantities of abrasive contents
(e.g. sand, gavel)
Intended use also includes compliance with this manual.
Any other use is regarded as non-compliant with the in-
tended use.
4

Product description

4.1

Design

Submersible sewage pump as a submersible monobloc
unit for intermittent operation for wet well installation.
7
6
5
Fig. 1: Overview
1 Handle/attachment point
2 Motor
3 Seal housing
4 Pressure port
5 Suction port
6 Hydraulics housing
7 Power supply cable
Installation and operating instructions Wilo-Rexa FIT
Product description
4.1.1
4.1.2
4.1.3
1
4.1.4
2
3
4
4.1.5
Hydraulics
Centrifugal hydraulics with vortex impeller and hori-
zontal flange connection on the pressure side.
The hydraulics are not self-priming, in other words, the
fluid must flow in either automatically or with supply
pressure.
Motor
The drive versions used are single-phase current and
three-phase current surface-cooled motors. The motor
is cooled by the fluid around it. The waste heat is trans-
ferred directly to the fluid via the motor housing. The
motor may emerge during operation.
With single-phase current motors, the operating capa-
citor is integrated in the motor. The connection cable is
available in the following versions:
▪ Single-phase current version:
– With shockproof plug
– With shockproof plug and fitted with a float switch
▪ Three-phase current version:
– With bare cable end
– With CEE plug and fitted with a float switch
Seal
The seal for the fluid and the motor compartment is
made via two mechanical seals. The sealing chamber
between the mechanical seals is filled with medical white
oil.
Material
▪ Pump housing: EN-GJL-250 (ASTM A48 Class 35/40B)
▪ Impeller: EN-GJL-250 (ASTM A48 Class 35/40B)
▪ Motor housing: Stainless steel AISI 1.4301 (304)
▪ Shaft: Stainless steel AISI 1.4021 (420)
▪ Seal on the motor side: C/MgSiO
▪ Seal on the fluid side: SiC/SiC
▪ Seal, static: NBR (Nitrile)
Fitted accessories
Float switch
In the "A" version the pump is equipped with a float
switch. Depending on the fill level, it is possible to switch
the pump on and off automatically, by using the float
switch.
Plug
In the "P" and "A" version, a shockproof plug is attached
for single-phase AC motors and a CEE plug is attached
for three-phase current motors. The plug is designed for
use in commercially available shock-proof or CEE sock-
ets and is not overflow-proof.
en
4
37