Using Different Brand Probes; Checks - Carel heaterSteam User Manual

7.6.4 Using different brand probes

Different brand probes can be used, with output signals selected, by programming the parameter A2, (see THE HUMIDIFIER
CONTROLLER) from the following:
voltage signal: 0-1Vdc; 0-10Vdc; 2-10Vdc.
current signal: 0-20mA; 4-20mA.
In addition, the maximum and minimum values must be programmed for the signal (parameters A3 and A4 for the ambient
probe; A7 and A8 for the supply probe).
The probes can be powered at the following voltages:
12V stabilised at terminal 4I;
32Vdc from the rectifying of 24Vac at terminal 3I.
The command signals must be connected:
for the regulation probe HT (that is TT in the case of controls for Steam baths) to terminal 5I, whose reference ground
(GND) is terminal 6I;
for the limiting probe CH, to terminal 1I, whose reference ground (GND) is terminal 2I.
IMPORTANT WARNINGS:
1. To avoid disturbances to regulation, the ground of the probes or the external regulators must be electrically
connected to the ground of the appliance's control.
2. For humidifier operation terminals 7I and 8I must be connected by an enabling contact or a jumper (default
solution). If terminals 7I and 8I are not connected, all internal and external devices commanded by the control are
disabled.

7.7 Checks

The following conditions represent correct electrical connection:
the rated voltage of the appliance corresponds to the voltage on the specification plate;
the fuses installed are suitable for the line and the voltage of the power supply ;
a line cut-off switch has been installed to enable power to the humidifier to be disconnected;
the electrical connections have been made as per the diagrams;
the power cable is fastened to the tear-proof cable clamp;
terminals 7I and 8I are connected by jumper or an enabling contact;
the ground of any non-Carel probes is electrically connected to the ground of the control;
if the appliance is commanded by an external regulator, the ground of the signal is electrically connected to the ground of
the control.
Carel code +030221761
17
preliminary version - rel. 2.0 - 03/09/99
heaterSteam