Ferroli VTP 15 Installation Manual page 28

Connection to IN-OUT signals
The unit enables connection to input or output signals that are able to modify the unit's operation in relation to the
different requirements or situations of use .
Available:
Output signals .
Output signals are activated in relation to how the unit is operating .
Available:
Abbrev . Function
Activated when the unit requests
AUX 1
heat mode
Activated when the unit requests
AUX 2
cool mode
12
INSTALLATION
Characteristic
Normally open Voltage-free contact
Normally open Voltage-free contact
Notes
Fig . 3