en
Installation and operating instructions • Wilo-Rexa FIT-S • Ed.01/2022-03
9
CAUTION
Total damage due to moisture ingress
The ingress of moisture into the connection cable
damages the cable and the pump! Never immerse
the ends of the connection cable in fluid. Seal them
tightly during storage.
•
Place the pump upright (vertical) on a firm bearing surface.
•
Secure the pump against falling over and slipping!
•
Store the pump for a maximum of one year. Consult the cus-
tomer service before storing the device for more than one year.
•
Storage conditions:
–
Maximum: -15 to +60 °C (5 to 140 °F), max. humidity: 90 %,
non-condensing.
–
Recommended: 5 to 25 °C (41 to 77 °F), relative humidity: 40
to 50 %.
–
Protect the pump from direct exposure to sunlight. Extreme
heat can cause damage!
•
Do not store the pump in rooms where welding work is carried
out. The resulting gases or radiation can corrode the elastomer
parts and coatings.
•
Seal the suction and discharge connection tightly.
•
Protect the connection cable against kinking and damage.
Maintain a constant bend radius!
4
Application/use
4.1
Intended use
For pumping in commercial areas of:
•
Sewage containing faeces
•
Wastewater (with small amounts of sand)
Sewage pumping according to (DIN) EN 12050
The pumps meet the requirements of EN 12050-1.
4.2
Improper use
DANGER
Explosion due to pumping of explosive fluids!
Pumping of highly flammable and explosive fluids
(gasoline, kerosene, etc.) in pure form is strictly pro-
hibited. There is a risk of fatal injury due to explo-
sion! The pumps are not designed for these fluids.
The submersible pumps must
not be used
for pumping:
•
Untreated sewage
•
Drinking water
•
Fluids containing hard components (such as stones, wood,
metal, etc.)
•
Fluids containing high quantities of abrasive contents (e.g.
sand, gravel).
Intended use also includes compliance with this manual. Any other
use is regarded as non-compliant with intended use.
5
Product description
5.1
Description
Fully submersible grinder pump for stationary and portable wet
well installation in intermittent operation.
1
2
3
4
5
6
7
Fig. 2:
Overview
1
Handle/attachment point
2
Motor housing
3
Discharge connection
4
Macerator
5
Hydraulics housing
6
Seal housing
7
Connection cable
Rexa FIT-S ... /M ... /P
Sewage pump with radial macerator with double shear effect. Hori-
zontal discharge port with flange and oval connection. Hydraulics
housing and impeller made of grey cast iron; macerator made of
hardened cutting steel. Surface-cooled 1~ motor with self-
switching thermal motor monitoring. Oil-filled sealing chamber
with two mechanical seals. Stainless steel motor housing. Detach-
able connection cable with capacitor box and plug (CEE 7/7).
Rexa FIT-S ... /M ... /A
Sewage pump with radial macerator with double shear effect. Hori-
zontal discharge port with flange and oval connection. Hydraulics
housing and impeller made of grey cast iron; macerator made of
hardened cutting steel. Surface-cooled 1~ motor with self-
switching thermal motor monitoring. Oil-filled sealing chamber
with two mechanical seals. Stainless steel motor housing. Detach-
able connection cable with capacitor box, float switch and plug
(CEE 7/7).
Rexa FIT-S ... /T ... /O
Sewage pump with radial macerator with double shear effect. Hori-
zontal discharge port with flange and oval connection. Hydraulics
housing and impeller made of grey cast iron; macerator made of
hardened cutting steel. Surface-cooled 3~ motor with thermal
motor monitoring. Oil-filled sealing chamber with two mechanical
seals. Stainless steel motor housing. Detachable connection cable
with bare cable ends.
5.2
Materials
•
Pump housing: EN-GJL-250 (ASTM A48 Class 35/40B)
•
Impeller: EN-GJL-250 (ASTM A48 Class 35/40B)
•
Macerator: 1.4528/59 HRC (AISI 440B+Co)
