Operating Conditions - Lorentz PS2-150 Manuel D'installation Et De Fonctionnement

4 Operating Conditions

Ambient requirements: PS2 pump systems can be oper-
ated up to 3000 meters above sea level and at an ambient
temperature of up to 50 °C. When the temperature reaches
the limit the power will be reduced automatically. The PS2
controller is designed for use in environments classified as
pollution degree 3 in accordance with IEC-664-1: Conduc-
tive pollution occurs, or dry non-conductive pollution, which
becomes conductive due to condensation, is to be expected.
Fluid: LORENTZ PS2 Helical Rotor (HR) and Centrifugal
pumps can be used for drinking water supply, livestock
watering and irrigation applications not containing solid or
long fibred particles larger than sand grains, with a max.
grain size of 2 mm. The max. permitted sand content is 50
ppm, a higher sand content will reduce the pump life con-
siderably due to wear. The max. salt content is 300-500 ppm
at max. 30°C / 85°F. Defects due to pumping other liquids
are not covered by the warranty.
LORENTZ PS2 Pool pumps can be used in chloride water,
salt water and sea water swimming pools. When used in
salt and sea water pools, the pump must be inspected and
cleaned regularly.
LORENTZ PS2 BOOST pumps can be used for clean
water applications only. The water must not contain any
abrasive particles. It is highly recommended to install an
intake strainer to protect the pump from any dirt ingress.
Please refer to "8.6.4 Filtering" on page 54 for further
information.
Fluid temperature: Depending on the type of your
LORENTZ pump system, different requirements for fluid
temperatures apply:
PS2 centrifugal submersible - The maximum fluid
temperature for centrifugal submersible pumps is +50 °C
(122 °F).
PS2 centrifugal surface - The maximum fluid temperature
for centrifugal surface pumps is +70 °C (158 °F).
PS2 pool pumps - The maximum fluid temperature for
pool pumps is +60 °C (140 °F).
PS2 boost surface - The maximum fluid temperature for
boost pumps is +80 °C (176 °F).
Operating Conditions
PS2 helical rotor (HR) submersible - Designing and
building helical rotor pumps for a narrow range of fluid
temperature is important to ensure the best possible
efficiency. LORENTZ PS2 helical rotor pumps are available in
five different temperature classes:
Temp. class 0:
Temp. class 1: +10 – +20 °C (50 – 68 °F)
Temp. class 2: +20 – +30 °C (68 – 86 °F)
Temp. class 3:
+30 – +40 °C (86 – 104 °F)
Temp. class 4: +40 – +50 °C (104 – 122 °F)
The pumps have a tolerance range of ± 2 °C ( ± 3.6 °F)
regarding the respective temperature ranges, except for the
lowest allowed temperature of 0 °C.
The temperature class is part of the pump units' name tag,
please refer to chapter"3.4 Naming" on page 8. The
pump system shall only be operated within the temperature
range specified upon ordering.
CAUTION – PS2-200 HR pump ends and
pump units must always be ordered with
the next higher temperature class, to avoid
starting problems in weak irradiation
conditions.
CAUTION – Operating the pump outside of
the specified temperature range can lead
to reduced efficiency and/or damage the
pump and can void the warranty.
INFORMATION – Due to the precise
tolerances within LORENTZ HR pumps
there may be situations where a higher
temperature class pump than the actual
water temperature is recommended.
These recommendations are based on
prior experience of local water impurities
and particulates within the water.
0 – +10 °C (32 – 50 °F)
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