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Secondary refrigerant
Coolant can be divided into primary coolant and secondary coolant. A secondary coolant is generally non-toxic in small amounts, though larger amounts must be disposed of appropriately.
Sensible cooling load
Sensible cooling load is a measurement of the amount of energy that must be removed from, for example, the air inside a building, in order to maintain a certain temperature, regardless of the temperature outside. Cooling load must be taken into account, when calculating the capacity of a cooling system.
Sensible heat ratio
Sensible heat ratio (SHR) is the term used to describe the ratio of sensible heat load to total heat load.
Shell and tube exchanger
Shell and tube heat exchangers exchange thermal energy from one fluid to another. Because it is characterised by low pressure loss, it is well-suited to air conditioning systems.
Soft pressure build-up
The 'Soft pressure build-up' function ensures a smooth start-up of systems containing empty pipes, for example.
Solenoid valve
Solenoid valves are broadly used for controlling heat or cooling with ON/OFF consumers. An electrical current is turned into a magnetic field, which opens or closes the valve mechanically.
Speed controlled operation
Speed control by means of a frequency converter is without no doubt the most efficient way of adjusting booster pump performance exposed to variable flow requirements. The speed control method results in a new Q/H curve at reduced head and flow.
Split unit
A split unit is a system that can both cool, heat and dehumidify air in a room, and is a good alternative to electrical heating.
Stop function
The stop function makes it possible to stop the last booster pump in operation, if there is no or very small consumption.
Subcooling
Subcooling is a technical expression for a refrigerant in liquid phase at a temperature lower than the corresponding evaporating temperature to the actual pressure.