Carel Resistive

heaterSteam series

heaterSteam features an extremely high technological content. The electric heater elements are
cast in aluminium plates, for lower power surface density and thus safer operation. The optional teflon
coating of the electric elements reduces the formation of deposits and, as a consequence, maintenance. The new system for the detection of mineral deposits on the elements, together
with the other safety systems, make heaterSteam extremely reliable and safe. The openable stainless steel cylinder with removable filter and the optional internal plastic lining for the collection of lime, make maintenance operations especially simple. The customer can choose between the economical ON/OFF control unit and the precise modulating control units. In addition it is possible to connect several humidifiers with the sophisticated graphic display humivisor, which also allows remote management (up to 1km) of a series of units.
Functions
All heaterSteam series humidifiers can be supplied with
three different types of control units, identified by letters:
- "C" type: humidifiers with ON/OFF control driven by an external signal
- "H" type: humidifiers with built-in humidity regulation unit (modulating control)
- "T" type: humidifiers specific for steam bath applications.

Type C: ON/OFF control
This is the simplest model that works with an easy understandable icon-based
 display.The C control works at either 0% or 100% of the preset maximum
production capacity, which makes it very easy to use and to understand. The
only programmable parameter is the steam production capacity, which can be set to 30%, 50%, 75% or 100% of the nominal capacity of the humidifier.
The C model type is ideal for all those situations where an external humidity regulation system is available, for instance an air handling unit fitted with a humidistat.

Type T: steam modulation driven by temperature
The heaterSteam model fitted with T type control has been developed for steam bath applications, for which the steam production is controlled in relation to the temperature.
For steam baths the relative humidity is always at saturation level 100%.
The control modulates the steam production and works basically like the H control, with the difference that the steam production is set in relation to the measured temperature instead of the relative humidity.
Also in this case, the ambient probe is not included.

Type H: modulating control, with built-in regulation
The "H" type humidifiers feature a built-in, fully programmable regulator, which must be completed with an external humidity probe for close-loop control. The control interface of the humidifier allows to set the humidity set point and the differential value, as well as many other parameters. The differential is the interval of probe signal in which the steam production is proportional to the request for additional humidity. If the relative humidity is lower than the beginning of the proportional regulation zone, the steam production will be 100% of capacity, in order to reach the requested humidity level as soon as possible. Then, the steam production will decreases as the relative humidity measured by the probe approaches the set point (proportional control zone). The steam production is modulated in a continuous mode from 10% to 100% of humidifier nominal capacity, allowing for a precise humidity control. To make the system even more flexible, the maximum production level can be limited to a value from 10% to 100% of the nominal capacity of the machine. In the units with H control a pre-heating function can be activated, which ensures an immediate steam production start when required. Optionally, the units with H control can be programmed to produce a quantity of steam proportional to the value of an external signal (0 to 1 Vdc, 0 to 10 Vdc, 2 to 10 Vdc, 0 to 20 mA or 4 to 20 mA). heaterSteam gives clear indications of possible malfunctions due to a large range of built-in alarms and diagnostic indications. Thanks to its several programmable parameters, the H is remarkably flexible, allowing the use of the same humidifier in a wide range of conditions. Up to 4 different humidifiers can be connected to CAREL’s humivisor, at a distance of up to 1 km, to remotely monitor the operation and edit any working parameter.The parameter programming can be also performed through remote control.