Relay Functions - Ferroli ECOTRONIC HiTech Manual Del Usuario

Δt setting
This value is the selectable temperature difference for mode 1 and 2 (see "6.3.1 - Variants").
Below this Δt value between the reference probes, the speed is reduced. If exceeded, the
speed is increased.

6.4 Relay functions

The relays not used in specific hydraulic variants, can be assigned to various special functions.
Each additional function can only be assigned once.
From R1 to R2: 230 V mechanical relay (230 V voltage output)
R3: voltage-free contact
V1: PWM and 0-10 V outputs
Pay special attention to technical information on the relay (see "Technical specifications" on
page 140).
The operation of relay R3 (voltage-free contact) is always in parallel with the function associ-
ated with relay 2.
Do not use relays 1 and 2 to directly control devices that require a voltage-free
contact (e.g. boilers)
The symbols shown here are displayed on the main screen when the special function is acti-
vated.
The sequence in this list does not correspond to the numbering of the menus in
the controller.
Solar bypass
Use a relay to turn on a bypass valve or pump. With this function, the flow can be run into the
storage when the flow temperature on the bypass probe is lower than that of the storage to be
loaded.
Solar bypass
Variant
In this menu, it is possible to set if the flow is run through the bypass with a pump or valve.
Bypass probe
The reference sensor for the flow bypass function is selected in this menu.
162 EN
code 3542A420 - Rev. 00 - 12/2021
ECOTRONIC HiTech