Specification

2. Operating conditions
Pumped liquids
• Thin, clean, non-aggressive and non-explosive liquids
without solid particles or fibres
• Cooling liquids, not containing mineral oil
• Domestic hot water
• Softened water.
The kinematic viscosity of water is 1 mm
2
/s (1 cSt) at 20
°C (68 °F) If the pump is used for a liquid with a higher
viscosity, the hydraulic performance of the pump will be
reduced.
Example: 50 % glycol at 20 °C (68 °F) means a viscosity
of approximately 10 mm
2
/s (10 cSt), reducing pump
performance by approximately 15 %.
When selecting a pump, the viscosity of the pumped liquid
must be taken into account.
Temperatures
Liquid temperature
Liquid temperature range: 2 to 95 °C (36 to 203 °F).
Operating temperature
We recommend that you keep the operating temperature
around 50 °C (122 °F) to minimise buildup of lime
deposits. Be aware of the risk of legionella contamination.
Ambient temperature
The ambient temperature must always be lower than the
liquid temperature to minimise condensation in the stator
housing, and not exceed 40 °C (104 °F).
Pressures
System pressure
Maximum system pressure (PN 10): 1.0 MPa (10 bar/145
psi).
Inlet pressure
To prevent cavitation noise and damage to the pump
bearing, a minimum inlet pressure of 0.5 bar (7.3 psi) (5 m
head) is required at the pump inlet port.
Pump location
Indoors, in a non-aggressive and non-explosive
atmosphere.
Relative humidity: Maximum 95 %.
COMFORT
2
6
Operating conditions