Control Circuit Connections - Elsteam KT Operator's Manual

KT Electrodes Humidifiers

1.15 Control circuit connections

Elsteam humidifiers are foreseen to operate in conjunction with practically all kind of humidistat
and to satisfy the major requirements of the installer without the use of any other optional.
1.15.1 Humidistats
Both humidistats, an-off and modulating type, can be utilized. The proportional type allows all the
possibilities of the humidifier to be taken completely advantage, obtaining excellent control of the
ambient relative humidity without fluctuations from the desired level. The precision and stability
of the humidity depends on two major parameters:
- precision of the humidistat used
- inertia of the humidification system
This system inertia is inversely proportional to the capacity of the humidifier, which is related to
the needs of the ambient itself. If the humidifier maximum output is not too low, but it is sized
correctly, the precision of the set point depends only from the humidistat.
Elsteam humidifier can be connected directly with:
1.15.2 ON-OFF Humidistats
This kind of humidistat has a simple output contact which switches on when the humidistat
demands humidity.
Wiring connections should be as shown in fig.
At the screw 1 the 12 Vdc voltage - compared with the 0 Volt of screw 3 - is protected by the fuse
F1 - (100 mA).
When the humidistat demands humidity, the 12 Vdc are supplied to the electronic card. The
contact 3 of the electronic card is unscrew.
1.15.3 Proportional Humidistats
When the system demands humidity, the humidistats gives an output voltage. In this case, connect
the humidistats to the humidifier electronic card, following fig.
If the humidifier output is more than 20 V, reduce the card input, using P4 (see 5.1 Electronic
adjustments)
1.15.4 Humidistats with resistive outputs
The humidistats gives a variable resistance related to the humidity.
Elsteam S.r.l - via E. Fermi, 496 - 21042 Caronno Pertusella (va) - Tel.+39 02 9659890 - Fax +39 02 96457007
E-mail: info@elsteam.it - Web: http://www.elsteam.com
Ver. 20.2.EN 13