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EXCLUSIVE X
ANTI-FREEZE SYSTEM
The boiler is fitted as standard with an automatic anti-freeze system that activates when the
temperature of the water in the primary circuit falls below 5°C. This system is always active
and provides protection for the boiler up to an air temperature in the installation area of 0°C.
b
To take advantage of this protection (based on burner operation), the boiler
must be able to switch itself on; any lockout condition (for ex. due to a lack
of gas or electrical supply, or the intervention of a safety device) therefore
deactivates the protection.
b
When the boiler is installed in a place where there is a risk of freezing, with
outside air temperatures below 0 °C, an antifreeze heater kit must be used to
protect the DHW circuit and condensation drain (available on request - see
catalog) that protects the boiler up to -15 °C.
b
The installation of the antifreeze heater kit must be carried out only by
authorized personnel, following the instructions contained in the kit.
In normal operating conditions, the boiler can protect itself against frost. You are advised
to add a good quality anti-freeze liquid to the primary circuit (respecting the manufacturer's
indications) if the temperature falls below 0°C, with the electricity supply disconnected and the
heating system full. For the hot domestic water part, we recommend you to drain the circuit.
The boiler component materials are resistant to ethylene glycol based antifreeze liquids.
MINIMUM DISTANCES
To ensure access to the boiler for normal maintenance operations, respect the minimum
installation clearances envisaged.For correct appliance positioning, bear in mind that:
- it must be installed on a wall that can support its weight
- it must not be placed above a cooker or other cooking device
- it is forbidden to leave inflammable products in the room where the boiler is installed
- heat-sensitive walls (e.g. wooden walls) must be protected with proper insulation.
* see paragraph 2.7
measured in mm
2.3
Instruction for condensation exhaust connection
This product is designed to prevent the escape of gaseous products of combustion through
the condensation drain pipe with which it is equipped, this is obtained by using a special
siphon placed inside the appliance.
b
All components of the product condensation drain system must be properly
maintained in accordance with the manufacturer instructions and cannot be
modified in any way.
The condensation exhaust system downstream of the appliance must comply with the
relevant legislation and standards. The construction of the condensation exhaust system
downstream of the appliance is the responsibility of the installer. The condensation
exhaust system must be dimensioned and installed in such a way as to guarantee the
correct evacuation of the condensation produced by the appliance and/or collected by
the evacuation systems of combustion products. All the components of the condensation
exhaust system must be made in a workmanlike manner using materials that are suitable for
withstanding the mechanical, thermal and chemical stresses of the condensation produced
by the appliance over time.
Note: If the condensation exhaust system is exposed to the risk of frost, always provide an
adequate level of insulation of the pipe and consider any increase in the diameter of the
pipe itself.
The condensation exhaust pipe must always have an adequate slope level to prevent the
condensation from stagnating and its proper drainage. The condensation exhaust system
must have an inspectable disconnection between the condensation exhaust pipe of the
appliance and the condensation exhaust system.
2.4
Electrical wiring
Low voltage connections
Carry out the low voltage connections as follows:
- use connectors supplied as standard:
- 4-poles ModBus connector for BUS 485 (- A B +)
- 8--poles connector for TBT - TA - OT+ - SE
CE4
(- A B +)
Bus 485
CE8
TBT
Low temperature limit thermostat
TA
Room thermostat (contact without voltage)
OT+
Open therm
SE
Outdoor temperature sensor
bianco - nero
white - white
4
CE8
TBT
TA
OT+
SE
Utilizzare contatto
Voltage free
privo di tensione
contact input
CE4
- A B +
- carry out the electrical wiring connections using the desired connector as shown in the
detailed drawing
- once the electrical wiring connections have been made, correctly insert the connector
into its counterpart.
b
We recommend using conductors with a section no larger than 0,5 mm2.
b
In the event of TA or TBT connection, remove the related jumpers on the terminal board.
b
If the low voltage electrical connection box is not connected the boiler does not ignite.
Connection of TERM. BOLL. (water tank thermostat) or SONDA BOLL. (water tank probe)
To connect the water tank thermostat and the water tank probe, access the boiler board as
indicated below:
- remove the casing as described in paragraph "2.6 Removing the casing"
- gently lift and rotate the instrument panel to free it from the side hooks
- remove the cover of the electrical parts.
- Connect TERM. BOLL. (water tank thermostat) and SONDA BOLL. (water tank probe) to
M4 as indicated in the figure
TERM.
SONDA
BOLL.
BOLL.
M4
10
X19
OTBus remote control connection
When an OTBus remote control is connected to the system, the boiler display shows the
message "Open Therm Connected", while some of its functions are disabled and transferred
to the OTBus remote control that takes control of the domestic hot water and heating
functions regarding the main zone.
FRI
09/04/2021
MENU
INFO
HOT WATER TEMPERATURE
TP
1
3
MOD
viola
rosso
marrone
blu
nero
grigio
1
PLANT
12:17
bar
1.5
STATE
OPENTHERM CONNECTED
42
°C
SET
violet
red
brown
blue
black
grey
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