Symbols Used In This Document; General Description; Applications; Operating Conditions - Grundfos S1 Instrucciones De Instalación Y Funcionamiento

2. Symbols used in this document

Warning
If these safety instructions are not observed,
it may result in personal injury.
Warning
The surface of the product may be so hot that
it may cause burns or personal injury.
Warning
The sound pressure level is so high that hearing
protection must be used.
Warning
These instructions must be observed for
explosion-proof pumps. It is advisable also to
follow these instructions for standard pumps.
If these safety instructions are not observed,
Caution
it may result in malfunction or damage to the
equipment.
Notes or instructions that make the job easier
Note Note
and ensure safe operation.

3. General description

This booklet includes instructions for installation, operation and
maintenance of Grundfos submersible sewage and wastewater
S pumps, range 50-70, fitted with motors of 10 to 210 hp (7.5 to
160 kW).
Special conditions for safe use of S pumps,
range 50-70 FM:
1. Installation shall comply with the relevant
requirements of the National Electrical Code
(ANSI/NFPA 70) and this manufacturer's
installation and operating instructions.
2. Make sure the moisture switches and thermal
switches are connected in two separate circuits
and have separate alarm outputs (motor stop) in
case of high humidity or high temperature in the
motor.
3. Bolts used for replacement must be class A4-80
or A2-80 according to EN/ISO 3506-1.
4. During operation the cooling jacket, when fitted,
must be filled with pumped liquid.
5. The level of pumped liquid must be controlled by
level switches connected to the motor control
circuit. The minimum level depends on the
installation type and is specified in these
installation and operating instructions.
6. Dry-running is not allowed.
7. Make sure the permanently attached cables are
suitably mechanically protected and terminated in
a suitable terminal board.
8. The sewage pumps have an ambient temperature
range of 32 °F to 104 °F (0 °C to +40 °C) and a
maximum process temperature 104 °F (+40 °C).
The thermal protector in the stator windings with
a nominal switch temperature of 302 °F (150 °C)
must guarantee the disconnection of the supply;
resetting must be manual.

3.1 Applications

S pumps, range 50-70 are designed for the pumping of sewage
and wastewater in a wide range of municipal, private and
industrial applications.
Depending on the installation type, the pumps can be used for
submerged or dry, horizontal or vertical installation.
Maximum solids size: 3- 6" (80-145 mm) depending on range.

3.2 Operating conditions

3.2.1 pH value
All pumps can be used for pumping liquids with a pH value
between 4 and 10.

3.2.2 Liquid temperature

32 °F to 104 °F (0 °C to +40 °C).
Warning
Explosion-proof pumps must never pump liquids
with a temperature higher than 104 °F (+40 °C).

3.2.3 Ambient temperature

-4 °F to 104 °F (-20 °C to +40 °C).
Warning
For explosion-proof pumps, the ambient
temperature on the installation site must be in
the range between 32 °F and +104 °F (0 °C and
+40 °C).

3.2.4 Density and viscosity of pumped liquid

Density: 133.5 ounces / gallon (1000 kg/m
Kinematic viscosity: 1 cSt (1 mm
When pumping liquids with a density and/or a
kinematic viscosity higher than the values stated
Note
Note
above, use motors with correspondingly higher
® outputs.

3.2.5 Flow velocity

It is advisable to keep a minimum flow velocity to avoid
sedimentations in the piping system.
Recommended velocities:
In vertical pipes: 2.3 ft/s (0.7 m/s)
In horizontal pipes: 3.3 ft/s (1.0 m/s)
3
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