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IMPORTANT WARNINGS:
1. To avoid unbalanced control, the ground of the probes or the external regulators must be connected to the
ground of the appliance’s controller.
2. For the operation of the humidifier, terminals AB (for P versions) or terminals 7I and 8I (for H versions) must be
connected to an enabling contact or alternatively jumpered (default solution). If these terminals are not con-
nected, all the internal and external devices managed by the controller will be disabled, with the exception of
the drain electrovalve for emptying the unit after extended periods (see chap. 12).
6.6 Checks
The following conditions represent correct electrical connection:
• the rated voltage of the appliance corresponds to the rated supply voltage;
• the fuses installed are suitable for the line and the power supply voltage;
• a mains disconnecting switch has been installed to disconnect power to the humidifier when required;
• the electrical connections have been performed as indicated in the diagrams;
• the power cable is fastened using the tear-proof cable gland;
• terminals 7I and 8I (version H) or terminals AB-AB (version P) are jumpered or connected to an enabling contact;
• the ground of any non-CAREL probes are connected to the controller’s ground;
• if the appliance is controlled by an external regulator, the ground of the control signal is connected to the controller’s
ground.
