Remote Controls And Room Chrono-Thermostats (Optional); External Probe (Optional) - Immergas VICTRIX EXA 28 1 ERP Instruction And Recommendation Booklet

1.7 REMOTE CONTROLS AND
ROOM CHRONO-THERMOSTATS
(OPTIONAL).
The boiler is prepared for the application of room
chrono-thermostats or remote controls, which
are available as optional kits. (Fig. 1-5)
All Immergas chrono-thermostats are connected
with 2 wires only. Carefully read the user and
assembly instructions contained in the acces-
sory kit.
• On/Off Immergas digital chrono-thermostat.
The chrono-thermostat allows:
- set two room temperature value: one for
daytime (comfort temperature) and one for
night-time (reduced temperature);
- set a weekly program with four daily switch
on and switch off times;
- select the required operating mode from the
various possible alternatives:
- manual mode (with adjustable temperature).
- automatic mode (with set program).
- forced automatic mode (momentarily
changing the temperature of the automatic
program).
The chrono-thermostat is powered by two 1.5V
LR 6 type alkaline batteries.
• Comando Amico Remoto Remote Control De-
V2 V2
vice (CAR ) with climate chrono-thermostat
function. In addition to the functions described
in the previous point, the CAR V2
the user to control all the important informa-
tion regarding operation of the appliance and
the heating system with the opportunity to eas-
ily intervene on the previously set parameters,
without having to go to where the appliance
is installed. The panel is provided with self-
diagnosis to display any boiler functioning
anomalies. The climate chrono-thermostat
incorporated into the remote panel enables
the system flow temperature to be adjusted to
the actual needs of the room being heated, in
order to obtain the desired room temperature
with extreme precision and therefore with
evident saving in running costs. The CAR
fed directly by the boiler by means of the same 2
wires used for the transmission of data between
the boiler and device.
Important: if the system is subdivided into zones
using the relevant kit, the CAR
with its climate thermostat function disabled, i.e.
it must be set to On/Off mode.
CAR V2 or chrono-thermostat On/Off electric
connection (Optional). The operations described
below must be performed after having removed
the voltage from the appliance. Any On/Off room
chrono-thermostat must be connected to clamps
40 and 41 eliminating jumper X40 (Fig. 3-2).
Make sure that the On/Off thermostat contact is
of the "clean" type, i.e. independent of the mains
voltage, otherwise the P.C.B. would be damaged.
V2
CAR must be connected to terminal boards 41
and 44, eliminating jumper X40 on the terminal
board (located in the control panel) (Part. e Fig.
1-4) paying attention not to invert the polarity
connections (Fig. 3-2). Connection with the
wrong polarity prevents functioning, but without
damaging the CAR
nected to one remote control.
panel enables
Important: if the CAR
arrange two separate lines in compliance with
current regulations regarding electrical systems.
No boiler pipes must ever be used to earth
the electric system or telephone lines. Ensure
elimination of this risk before making the boiler
electrical connections.
1-5
1-6
V2
is
V2 must be used
V2
The boiler can only be con-
V2 remote control is used,
EXTERNAL PROBE
Correction law of the flow temperature depending on the external temperature
and user adjustments of the central heating temperature.
In brackets, temperature value with 25°/50° range
8
1.8

EXTERNAL PROBE (OPTIONAL).

The boiler is designed for the application of the
external temperature probe (Fig. 1-6), which is
available as an optional kit. Refer to the relative
instruction sheet for positioning of the external
probe.
The probe can be connected directly to the boiler
electrical system and allows the max. system
flow temperature to be automatically decreased
when the external temperature increases, in
order to adjust the heat supplied to the system
according to the change in external temperature.
The external probe always operates when con-
nected, regardless of the presence or type of room
chrono-thermostat used and can work in combi-
nation with Immergas chrono-thermostats. The
correlation between system flow temperature
and external temperature is determined by the
position of the central heating selector switch on
the boiler control panel (or on the CAR
panel if connected to the boiler) according to the
curves shown in the diagram (Fig. 1-7).
The electric connection of the external probe
must be made on clamps 38 and 39 on the termi-
nal board in the control panel (Part. d Fig. 1-4).
Position of the central heating tem-
perature user adjustment
V2
control
1-7