Download the alarm wiring diagram

It is the maximum vertical height to which the pump can discharge water.

It is the maximum vertical height between the pump and the vessel containing the condensates, beyond which the pump can no longer suck up water.

When an air conditioning system is in use, the humidity in the air condenses inside the system, thus forming condensates.
These condensates are contaminated by all of the various impurities present in the air. For instance, depending on where the air conditioning system is used, the condensates could contain dust, flour (baker’s shop), hair (hair dressing parlour), etc.
View the animation: Principle of forming condensates

The vent tube is necessary to allow air to enter the detector when the pump is sucking up water inside. The float is therefore not limited in its movement.
It is recommended to position the pump so that the level of the vent tube is above the level of the water tank, which avoids any leaks through the vent in the case of a condensate removal malfunction.

The SI 1800 pump can receive condensates of maximum T = 65°C and pH > 3.4
The SI 1805 and SI 1820 pumps can receive condensates of maximum T = 80°C - pH > 3.4
The SI 1822 pump can receive condensates of maximum T = 65°C - pH > 3.4
The SI 1850 pump can receive condensates of maximum T = 87°C - pH > 3.4

The detection levels of piston pump (SI 1082 monoblock pump with in-built detection) and the SI 2958 detector (supplied with the SI 3080, SI 3100, SI 3200, SI 1730 and PE 5200 pumps) are measured from their lower face when laid flat.
- View the reference point on the SI 1082 pump
- View the reference point on the SI 2958 detector