In most cases, the outside air is of a lower temperature than the one needed for the injected air, and so it is often necessary to heat the air prior to injecting it into the building. The air can be heated in the heating unit, with the use of hot water of electric heaters.
The electric heaters are used to heat air up to 40-70 °C where the environment is dry and there is no possibility of any explosion, as well as for installation into canals, air conditioning chambers and air conditioning equipment closets. They can be used in air conditioning systems due to their easy installation process. They are delivered either with or without automation devices, on customer demand.
Electric heating units
Electric heating units (canal electric heaters) consist of a certain number of isolated metal fibers or wire spirals. They create electrical resistance which transforms energy into heat. The advantages of canal electric heating units are the following:
- a slight decrease in pressure,
- power calculation made easy
- low cost installation.
We manufacture heaters with a power range from 2 to 150 kW.
The heater is made up of smooth pipes fitted into a steel sheet metal frame. The housing for the frame containing heating elements is made of sheet metal. The box with clamps used to connect the heater to the power source is located on the outside of the housing and contains screws used to fasten and secure the contacts. The standard electric socket is 3 x 380 V, 50 Hz.
In addition to the heater, on customer demand we also deliver a complete regulatory circle for the maintenance of the set temperature, which consists of a room thermostat, a step temperature regulator system, a pressure switch and limit thermostat.
In accordance with the fire safety regulations, heaters with a capacity up to 6000 m³/h come equipped with one, and an additional to two safety thermostats. Along with the ordered elements, we also deliver a pressure switch, an air switch which directly controls the air flow and prevents the electric heater from working if there is no air flow or it falls below the minimum set limit (due to a ventilator or electro motor malfunction or the breaking of the belts).
The electric heater is universal and symmetrical. It can be installed in either a horizontal or vertical position. The direction of the flow is irrelevant. The heater can be installed either on the left or right side, but the dismantling of the heater is always lateral.
One of the disadvantages is that the metal fibers have a significant heat generation, so that the canal heaters need to be installed with some form of safety device to protect against overheating.