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1-3
1-4
1-5
1-6
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31
58
*
INS
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MAINTEN
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1.8 REMOTE CONTROLS AND
ROOM CHRONOTHERMOSTATS
(OPTIONAL).
The boiler is prepared for application of room
chronothermostats and external probe. These
Immergas components are available as separate
kits to the boiler and are supplied on request.
All Immergas chronothermostats are connected
with 2 wires only. Carefully read the user and
assembly instructions contained in the accessory
kit.
• On/Off digital chrono-thermostat (Fig. 1-3).
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 operation (with adjustable tempera-
ture).
- automatic operation (with set programme).
- forced automatic operation (momentarily
changing the temperature of the automatic
programme).
The chronothermostat is powered by two 1.5V
LR 6 type alkaline batteries.
• There are two types of Remote Friend Con-
trolV2 (CAR
V2
) (Fig. 1-3) and Mini Digital
Remote Control (Mini CRD) (Fig. 1-4) both
with room chronothermostat functioning.
In addition to the functions described in the
previous point, the control panel enables the
user to keep under control and within reach
all the important information regarding ope-
ration of the appliance and the heating system
with the ability to easily act on previously set
parameters, with no need to go to where the ap-
pliance 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 remote control is
fed directly by the boiler by means of the same 2
wires used for the transmission of data between
boiler and device.
Important:
If the system is subdivided into zones
using the relevant kit. the CARV2 must be used
with its climate thermostat function disabled, i.e.
it must be set to On/Off mode. The Mini CRD
cannot be used for plants divided into zones.
Electrical connection of the Remote Friend
ControlV2, chronothermostat On/Off (Op-
tional) or Mini .
The operations described below
must be performed after having removed the
voltage from the appliance.
The eventual ther-
mostat or On/Off room chronothermostat must
be connected to terminals 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 supply; otherwise the
electronic adjustment card would be damaged.
The eventual Remote Friend ControlV2 must be
connected by means of terminals IN+ and IN- to
terminals 42 and 43, eliminating jumper X40
on the terminal board (in the boiler) respecting
polarity (Fig. 3-2). Connection with the wrong
polarity prevents functioning, but without
damaging the Remote Friend ControlV2. Any
Digital Remote Control must be connected to
terminals 40 e 41 eliminating jumper X40 on
the P.C.B. (in the boiler), (Fig. 3-2). The boiler
works with the parameters set on the Remote
Friend ControlV2 only if the boiler main se-
lector is turned to Domestic/Remote Control
(
). The boiler can only be connected to one
remote control.
Important:
If the Remote Friend ControlV2,
Mini Digital Remote Control or any other On/Off
chronothermostat is used arrange two separate
lines in compliance with current regulations
regarding electrical systems. Boiler pipes must
never be used to earth the electric or telephone
lines. Ensure elimination of this risk before ma-
king the boiler electrical connections.
1.9 EXTERNAL PROBE (OPTIONAL).
• External temperature probe (Fig. 1-5).
Refer to the relevant instruction sheet for
positioning the external probe.
This sensor can be connected directly to
the boiler electrical system and allows the
max. system delivery temperature to be
automatically decreased when the outside
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 connected,
regardless of the presence or type of room
chronothermostat used. The correlation
between system delivery temperature and
outside temperature is determined by the
position of the knob on the boiler control
panel according to the curves shown in the
diagram (Fig. 1-6). The external probe electrical
connection must be made on clamps 38 and 39
on the boiler circuit board (Fig. 3-2).
*
(Fig. 1-6) Position of the heating temperature
user adjustment.
Summary of Contents for AVIO 24 2 ERP
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