thermital ACQUAHOME I BLU User manual

ACQUAHOME I BLU
USER MANUAL

22
ENGLISH
Dear Customer,
Thank you for preferring a Theating unit, a mod-
ern, high-quality product that is able to guarantee your maxi-
mum well-being for a long period of time, with high levels of
reliability and safety. In particular, if working together with a
Technical Assistance Centre Tthat is specifically
prepared and trained to perform periodic maintenance, your
unit will remain at maximum efficiency levels at minimum op-
erating costs and if required, replacements with original spare
parts can be made.
This instruction manual contains important instructions and
precautions that must be observed to ensure the trouble-free
installation and efficient functioning of your ACQUAHOME I BLU
boiler.
Please accept our renewed thanks for your purchase
Thermital
CONFORMITY
ACQUAHOME I BLU boilers conform to the following directives:
- Directive 92/42/EEC on efficiency requirements
- Electromagnetic Compatibility Directive 2014/30/EU
- Low Voltage Directive 2014/35/EU
- Ecodesign Directive 2009/125/CE for energy-related
products
- Regulation (EU) 2017/1369 Energy labelling
- Delegated Regulation (EU) N. 811/2013
- Delegated Regulation (EU) N. 813/2013
- Delegated Regulation (EU) N. 814/2013
At the end of its life, the product should
be not be disposed of as solid urban
waste, but rather it should be handed over
to a differentiated waste collection centre.
ENGLISH

This manual, Code 20180154 - Rev. 0 (05/20) comprises 20 pages.
33ENGLISH
CONTENTS
The following symbols are used in this manual:
b
CAUTION! = Identifies actions that require caution and
adequate preparation.
a
STOP! = Identifies actions that you MUST NOT do.
Thismanual,Code
-Rev.
comprises
pages.
GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . 4
General Safety Information. . . . . . . . . . . . . . . . . . . . . . . . . . 4
Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Description of the appliance . . . . . . . . . . . . . . . . . . . . . . . . 5
Safety and control devices. . . . . . . . . . . . . . . . . . . . . . . . . . 5
System layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Menu navigation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Navigation scheme. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
List of user parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
USE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Putting into service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Preliminary operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Start-up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Adjustment of heating setpoint. . . . . . . . . . . . . . . . . . . . . . 15
Enable/disable the heating function. . . . . . . . . . . . . . . . . . 15
Enable/disable the domestic function . . . . . . . . . . . . . . . . 15
Adjustment of domestic setpoint . . . . . . . . . . . . . . . . . . . . 15
Special functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Ignition failure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Temporary or short-term shut-down . . . . . . . . . . . . . . . . . . 17
Preparing for extended periods of disuse . . . . . . . . . . . . . 17
Device cleaning and maintenance. . . . . . . . . . . . . . . . . . . 17
External cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Annual cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
RECYCLING AND DISPOSAL . . . . . . . . . . . . . . . . 19

44
ENGLISH
GENERAL INFORMATION
General Safety Information
b
This product must be installed by a legally qualified heat-
ing engineer. On completion of the installation, the install-
er must issue the owner with a declaration of conformity
confirming that the installation has been completed to
the highest standards in compliance with the instructions
provided by Tin this instruction manual, and
that it conforms to all applicable laws and standards.
b
This product must only be used for the purpose for which
it is designed and made, as specified by T.
Tdeclines all responsibility, contractual or
other, for damage to property or injury to persons or ani-
mals caused by improper installation, adjustment, main-
tenance or use.
b
The room where the boiler is installed must be properly
ventilated to ensure a sufficient supply of air for correct
combustion.
b
If you notice any water leaks, disconnect the boiler from
the mains electricity supply and shut off the water supply.
b
In case of water leaks disconnect the equipment from
the power mains, close the water supply and promptly
alert Technical Assistance Centre Tor pro-
fessionally qualified personnel.
b
The boiler must be serviced at least once a year. The
failure to perform annual maintenance work will void the
warranty of the equipment.
b
Periodically check that pressure in the central heating
circuit, when cold, is approximately 1.5 bar and be-
low the maximum limit specified for the boiler. If this is
not the case, contact the Technical Assistance Centre
Tor professionally qualified personnel.
b
If the boiler is not going to be used for an extended peri-
od of time, perform the operations described later in this
manual.
b
This manual is an integral part of the equipment and
therefore must be stored carefully and must ALWAYS ac-
company the boiler even if it is sold to another Owner or
User or transferred to another plant. If it is damaged or
lost, request another copy from your local Technical As-
sistance Centre T.
Precautions
The operation of any appliance that uses fuel, electrical power
and water demands that a number of fundamental safety pre-
cautions be respected:
a
Do not allow children or infirm persons to operate the
system unsupervised.
a
It is forbidden to use electrical devices or equipment,
such as switches, appliances, etc. if there is a smell of
gas or un-burnt products. If so:
- Ventilate the room, opening doors and windows
- Close the fuel shut-off cock
- Ask for the prompt intervention of the Technical Assis-
tance Centre
a
Do not touch the boiler while barefoot or wet.
a
Never pull, disconnect, or twist the electrical cables com-
ing from the appliance even if it is disconnected from the
mains electricity supply.
a
Do not obstruct or restrict the vents in the room where
the boiler is installed. Adequate ventilation is essential for
correct combustion.
a
Do not expose the boiler to the elements. It is not de-
signed for use outdoors.
a
It is prohibited to leave inflammable substances and con-
tainers in the room where the boiler is installed.
a
Do not dispose of packaging material into the environ-
ment, or leave it within the reach of children, since it can
become a potential hazard. Dispose of packaging mate-
rial in compliance with applicable legislation.
a
It is forbidden to operate the boiler without water.
a
The equipment casing must not be removed by people
without specific qualification and expertise.

55ENGLISH
Description of the appliance
The thermal unit ACQUAHOME I BLU is a hot water generator for
the heating of environments and instant production of domes-
tic hot water (DHW) by means of a dedicate plate exchanger.
It can function at low temperature and is oil fuelled.
The low NOx burner features a single-stage operation and a
vertical steel combustion chamber.
The boiler unit is effectively and accurately insulated with a
high-density glass wool mat.
The control panel includes a user interface with display and an
electronic board for the thermal unit adjustment and control,
which allows to manage the control and safety devices in com-
pliance with the regulations in force.
Safety and control devices
The control panel, apart from managing the functions of the
thermal unit
ACQUAHOME I BLU , allows to highlight any anom-
aly which may affect its correct operation, ensuring the thermal
unit safety by stopping it and automatically closing the burner
light oil valve.
The burner control and adjustment board is also used to en-
sure the burner safety by managing its correct operation.
Any anomaly which may affect the generator operation forces
it to stop (lock-out) and is promptly signalled with a numerical
error code on the regulator display.
The following are installed on the water circuit:
-
Safety thermostat : fitted on the generator body, it inter-
venes by stopping (permanent error) the thermal unit
if the boiler temperature exceeds the limit threshold of
110°C;
-
Safety valve : intervenes if the boiler pressure exceeds
the limit threshold of 3 bar;
-
Pressure transducer : sends a signal to the electron-
ic regulator which views and continually checks the
primary circuit pressure to switch on the generator or
cause it to stop in case of low pressure;
-
Boiler temperature probes (delivery and return) : immer-
sion probe on the delivery line of the generator is used
by the regulator to view and check the delivery water
temperature and check the correct switching on and off
of the burner based on the programmed setpoint. The
regulator uses the same probe to switch off the genera-
tor in case of overtemperature, before the triggering of
the safety thermostat. The contact probe placed on the
return line of the boiler is used by the regulator to view
the return water temperature with which it calculates,
together with the delivery temperature, the temperature
difference between delivery and return (∆t), which al-
lows regulating the modulation of the circulator in heat-
ing mode.
-
Domestic circuit temperature probes (plate exchanger) :
there are two temperature probes on the domestic plate
exchanger circuit. One immersion probe is placed on
the domestic cold water inlet and the other one on the
domestic hot water outlet. The regulator uses these two
probes to view and check the domestic water temper-
ature and manage the functions (DHW Setpoint, DHW
request) of the relevant parameters.
b
The intervention of a safety device indicates a potentially
dangerous malfunction in the system. Contact the manu-
facturer’s Technical Assistance Centre immediately.
b
Safety devices must only be replaced by the manufac-
turer's Technical Assistance Centre using original spare
parts. Refer to the spare parts catalogue supplied with
the boiler. After making the repair, check that the appli-
ance is working properly.
a
The appliance must not be put in service, even temporar-
ily, when tampered safety devices are not in operation or
have been tampered with.

66
ENGLISH
System layout
ACQUAHOME I BLU
3
5
2
1
4
6
7
9
10
8
11
13
14
12
16
15
17
17
18
1 3-way diverting valve
2 Electric actuator
3 Safety valve
4 Main switch
5 Domestic plate exchanger
6 Control panel
7 System load valve
8 Heating expansion reservoir
9 Burner
10 Boiler drain cock
11 Pump
12 Flame inspection window
13 Boiler body
14 Serial number plate
15 Exhaust flue duct
16 Flue gas box cover
17 Lifting bracket
18 Automatic bleed valve

77ENGLISH
Control panel
Controls interface
5
5
1
2
3
4
6
1 Door
2 Light guide
3 Rear light display
4 ENTER/RESET key: it allows accessing the main menu and restoring the operation after a stop
due to an anomaly
5 Navigation keys
6 Main switch (located on the equipment rear wall)
Light Guide displaying
STATUS DESCRIPTION
Green blinking Thermal unit drain cycle and initialization in progress after the power
supply reset.
Steady green Thermal unit on
Steady red Thermal unit in alarm mode
Red blinking Thermal unit in lock-out mode

88
ENGLISH
Display visualisation
HEAT
Bar
Bar
°C
°F
Psi
Psi
OUTSIDE
1 2 3 4 5
6
78
9
10
11
1 Icon displayed when heating mode is enabled. Blinking when there is a heat demand
2 Icon displayed when DHW mode is enabled. Blinking when there is an DHW Demand
3 Icon displayed when entering the "Installer" menu
4 Icon displayed when the burner of the equipment is on. The icon will be marked with a cross in
case of Permanent or Temporary error.
5 Icon displayed when the climatic mode operation is active (Par. 2001= 1 or 2)
6 Celsius/Fahrenheit temperature
7 Displays current value
8 Displaying of system pressure or parameter number or external temperature
9 Icon displayed when the circulator is operating
10 Pressure in Bar/Psi
11 Icon displayed when the outdoor probe is connected

99ENGLISH
Menu navigation
At start-up or when no key is pressed for more than 4 minutes, the display is in “basic display” mode and provides general in-
formation on the equipment operation.
5
3
4
2
1
In this mode, keys have the following functions:
Nr. Button Function
1"+"It increases the heating setpoint (when active/available)
2"-"It decreases the heating setpoint (when active/available)
3"▲"Raise the DHW set point (when available)
4"▼"Decrease the DHW set point (when available)
5 "ENTER/RESET" Enters into "MENU" mode
If pressed for more than 5 seconds, it resets a permanent error (Loc)
Additional functions:
Button Function
"+" with "-" It accesses enable/disable heating function mode
"▲" + "▼"It accesses enable/disable DHW production function mode
b
For more information, see paragraph "Enable/disable the heating function" on page 15.
"Basic display" mode
Adjustment of heating setpoint
°C
Adjustment of domestic setpoint
°C
or
or or
°C or

1010
ENGLISH
MENU selection
Enters into "MENU" mode when "MENU/RESET" key is pushed. The figures of the small display indicate "0000" which is the first
accessible menu.
5
3
4
2
1
In this mode, keys have the following functions:
Nr. Button Function
1 "+" Exits from the menu and cancels a parameter change
2 "-" Exits from the menu and cancels a parameter change
3"▲"Selects the following menu or increases a certain parameter value
4"▼"Selects the previous menu or decreases a certain parameter value
5 "ENTER/RESET" Enters into the selected menu/parameter or confirms the parameter change

1111 ENGLISH
Navigation scheme
Modalità “visualizzazione base”
Modalità “utente”
Bar
°C
oppure
Example of parameter setting
change
conrmed
change
canceled
or
or or

1212
ENGLISH
List of user parameters
Menu Par.
No. Description Range Default setting UM
Main menu
0000 013
Quick adjustment of direct Zone/Zone 1 heating setpoint in 0
and 3 heating modes.
By connecting the zone control accessory, this parameter can
be used to quickly change direct Zone/Zone 1 setpoint. This
parameter simultaneously modifies the value of Par. 2103.
See Par. 2103 See Par.
2103 °C
0000 023
Quick adjustment of Zone 2 heating setpoint in 0 and 3 heating
modes.
By connecting the zone control accessory, this parameter can
be used to quickly change Zone 2 setpoint. This parameter
simultaneously modifies the value of Par. 2203.
See Par. 2203 See Par.
2203 °C
0000 033
Quick adjustment of Zone 3 heating setpoint in 0 and 3 heating
modes.
By connecting the zone control accessory, this parameter can
be used to quickly change Zone 3 setpoint. This parameter
simultaneously modifies the value of Par. 2303.
See Par. 2303 See Par.
2303 °C
0000 047 Quick adjustment of DHW setpoint with heater
This parameter is only visible with Par. 2035 = 1 See Par. 2047 °C
0000 048 Quick adjustment of DHW setpoint with instant production
This parameter is only visible with Par. 2035 = 10 See Par. 2048 °C
0000 201
Stops the venting function
0 = No action
1 = Stop venting
Visible only when de-aeration is in operation
0…1 0
Info menu
1000 1001 CH flow temperature °C
1000 1002 Domestic hot water temperature °C
1000 1003 Domestic cold water temperature
This parameter is only visible with Par. 2035 = 10 °C
1000 1004 Outdoor temperature °C
1000 1007 Return temperature °C
1000 1033 System pressure bar
1000 1056 Total hours of operation in heating mode h x 10
1000 1057 Total hours of operation in domestic mode h x 10
1000 1058 Total hours of operation h x 10
1000 1062 Function not implemented
1000 1063 Input signal 0-10V V
1000 1090
Counts down the days to the next service (if it’s past, a nega-
tive value is shown)
If the value is < 15 the service icon flashes
Days
1000 1101 Direct Zone/Zone 1 delivery temperature °C
1000 1102 Direct Zone/Zone 1 ambient temperature °C
1000 1112 Zone 1 heating setpoint °C
1000 1201 Zone 2 delivery temperature °C
1000 1202 Zone 2 ambient temperature °C
1000 1212 Zone 2 heating setpoint °C
1000 1301 Zone 3 delivery temperature °C
1000 1302 Zone 3 ambient temperature °C
1000 1312 Zone 3 heating setpoint °C
Heating general settings
2000 2021 Number of days to next service 365 Days
2000 2022
Service reminder
This function reminds the user of the need to carry out a pro-
grammed service on the boiler, after the number of days set in
Par. 2021
0 = Deactivates the function
1 = Activates the function
2 = Resets the countdown of days to next service to zero
0…2 0
2000 2078
Set service hours countdown
0= Burner’s hours of operation
1 = Boiler’s hours of operation
0…1 0

1313 ENGLISH
Menu Par.
No. Description Range Default setting UM
Direct Zone / Zone 1 Heating Settings
2000 2103
Direct Zone/Zone 1 setpoint in heating mode Par. 2001= 0 and
3
The thermal unit adjustment determines the boiler setpoint in
heating mode, using the highest value among the requests of
all the active zones (Par. 1101, 1201, 1301)
If Zone 1 is configured as mixed, the value set in parameter
1112 will be used as setpoint
If Zone 1 is not
enabled:
(Par. 2121, Par.
2024)
If Zone 1 is ena-
bled:
BT: (Par. 2121, 45)
AT: (Par. 2121, Par.
2024)
70 (AT)
45 (BT) °C
2000 2130 Parallel shift of direct Zone/Zone 1 climatic curve -10…10 0 °C
Zone 2 Heating Settings
2000 2203
Zone 2 heating setpoint in 0 and 3 heating modes
The thermal unit adjustment determines the boiler setpoint in
heating mode, using the highest value among the requests of
all the active zones (Par. 1101, 1201, 1301)
If Zone 2 is set as mixed, the value set in parameter 1212 will
be used as the setpoint.
BT: (Par. 2221, 45)
AT: (Par. 2221, Par.
2024)
70 (AT)
45 (BT) °C
2000 2230 Parallel shift of direct Zone/Zone 1 climatic curve -10…10 0 °C
Zone 3 Heating Settings
2000 2303
Zone 3 heating setpoint in 0 and 3 heating modes
The thermal unit adjustment determines the boiler setpoint in
heating mode, using the highest value among the requests of
all the active zones (Par. 1101, 1201, 1301)
If Zone 3 is set as mixed, the value set in parameter 1312 will
be used as the setpoint.
BT: (Par. 2321, 45)
AT: (Par. 2321, Par.
2024)
70 (AT)
45 (BT) °C
2000 2330 Parallel shift of direct Zone/Zone 1 climatic curve -10…10 0 °C
DHW settings and system conguration
2000 2047 DHW setpoint with heater
This parameter is only visible with Par. 2035 = 1 40...65 57 °C
2000 2048 DHW setpoint with instant production
This parameter is only visible with Par. 2035 = 10 40…70 45 °C
Error log
9000 9001 Error log - 1 0…9999
9000 9002 Error log - 2 0…9999
9000 9003 Error log - 3 0…9999
9000 9004 Error log - 4 0…9999
9000 9005 Error log - 5 0…9999
9000 9006 Error log - 6 0…9999
9000 9007 Error log - 7 0…9999
9000 9008 Error log - 8 0…9999
9000 9009 Error log - 9 0…9999
9000 9010 Error log - 10 0…9999

1414
ENGLISH
USE
Putting into service
Have the TTechnical Assistance Service start up
your ACQUAHOME I BLU boiler for the first time. Once this has
been done, the boiler can be left to function automatically.
Under certain circumstances, such as after long periods of
disuse, the user may need to re-start it without involving the
Technical Assistance Centre.
Preliminary operations
Perform the following checks before starting up the boiler:
- Check that the fuel shut-off cock and heating system
shut-off cock are open
- the pressure of the hydraulic circuit, with cold water, is
1.5 bar (value indicated on the first screen of the control
panel display) and the circuit is not vented
- The thermal unit ACQUAHOME 25 I BLU is equipped with
a system load valve located inside the thermal unit
Bar
°C
- close the system load valve.
Start-up
Once you have completed all the checks listed above, pro-
ceed as follows to start up the boiler for the first time:
- set the main switch of the system to ON and the main
switch of the equipment to ( I ).
Upon switching on, the display of the control interface of the
device shows the following pages in sequence.
HEAT
Bar
Bar
°C
°F
Psi
Psi
OUTSIDE
Firmware version of the thermal unit interface.
In the example the message indicates a firmware version = 0.
Communication test between interface and regulator.
The message “init” will appear briefly to indicate the beginning
of the communication between the interface and regulator in-
side the thermal unit (*)
Firmware version of the thermal unit regulator.
In the example the message indicates a firmware version = 1.
At first start-up and at every restoration of the power supply
the venting function signalled by the message “Air” activates.
The vent cycle lasts 14 minutes.
°C

1515 ENGLISH
(*) If the communication test fails the message “no COMM”
will appear
Once the initialization phase is complete, the display switches
to “basic display” mode.
In this mode, the main information on the equipment operation
is displayed. The meaning of the different icons displayed is
explained in paragraph “Control panel”. The icon and the
heating delivery temperature are displayed, either if the boiler
is in stand-by mode or if a temperature request is active (icon
blinking).
To switch off the equipment, set the main switch to “0”.
b
Never power off the appliance before switching the mas-
ter switch to the "0" position.
b
Never switch off the appliance with the master switch if a
request is active. Always make sure that the appliance is
in stand-by before switching the main switch.
Example of generator stand-by display in heating only
mode (external probe not connected)
Bar
°C
- Set the room thermostat to the required temperature (~
20°C) or, if the system has a timer or timer-thermostat,
make sure that this is switched “ON” and adjusted to
the required temperature (~ 20°C);
Adjustment of heating setpoint
- Press the key“+” or “-” to display the current value of the
heating temperature setpoint.
°C
- Increase or decrease the setpoint according to the type
of system by using the key “+” of “-”.
- To save the modification made and go back to the initial
screen, wait for 3 seconds or press the key “ENTER/
RESET”.
- Check that the thermal unit starts the ignition phase and
that the display shows the icon blinking (ambient
heating request) and the icon .
- The boiler now starts up and the burner remains lit until
the temperature setpoint is reached.
Enable/disable the heating function
- Press the keys “+” and “-” simultaneously for a few sec-
onds;
- The icon and the current heating mode (ON or OFF)
will blink on the display;
- Press the keys “+” and “–” to select the required mode;
- Press the key “ENTER/RESET” or wait for 3 seconds to
save the modification made and go back to the initial
screen.
Enable/disable the domestic function
- Press the keys "▲" and "▼" simultaneously for a few
seconds;
- The icon and the current domestic mode (ON or
OFF) will blink on the display;
- Press the keys "▲" and "▼" to select the required mode;
- To save the modification made and go back to the initial
screen, press the key “ENTER/RESET”.
Adjustment of domestic setpoint
- Press the key "▲" o "▼" to display the current value of
domestic setpoint.
°C
- Increase or decrease the setpoint by using the key “▲"
o "▼".
- To save the modification made and go back to the initial
screen, press the key “ENTER/RESET”.

1616
ENGLISH
Special functions
When a special function is active, a specific message is shown
on the display of the device control interface.
Frost protection
The anti-freeze protection function protects the system against
freezing.
When the anti-freeze function is active, the message “AFro” is
displayed.
The intervention modes are the following:
- Burner anti-freeze protection: If the temperature of the
delivery probe of the device drops below 5°C the burn-
er turns on and stays on until the delivery temperature
exceeds 10°C (with the external probe connected the
protection activates only with external temperature val-
ues < 10°C).
-
Heating circuit anti-freeze protection: If the burner stays
off for 6 consecutive hours the circulator of the device
will activate for 5 minutes. If the temperature of the de-
livery probe of the device drops below 5°C the burn-
er turns on and stays on until the delivery temperature
exceeds 10°C (with the external probe connected the
protection activates only with external temperature val-
ues < 10°C).
Venting
The function is automatically enabled at the first start-up and at
each reset of the power supply.
When the function is active, the message “Air” is displayed.
During the venting, the circulator is enabled, so that the air
which may be present inside the system circuit can exit through
the automatic drain valve of the device.
The status of the light guide changes to flashing green.
Circulator and 3-way valve activation every 24 hours
Every 24 hours the circulator and 3-way diverting valve are
activated for 30 seconds (only in heating mode 0,1,4).
This function prevents the circulator and valve from getting
stuck in a determined position.
Ignition failure
If an ignition or operating anomaly occurs, the thermal unit dis-
play will show a text message (small digit) and a number (large
digit), which vary according to the anomaly detected.
There are 3 error levels:
- Permanent (Loc)
- Temporary (Err)
- Alerts (AttE)
Permanent Error
The text “Loc” is displayed together with the permanent er-
ror number. The icon indicates that the burner is disabled.
The equipment must be manually reset by keeping the key
“ENETER/RESET” pressed.
Temporary Error
The text “Err” is displayed together with the temporary error
number.
The icon indicates that the burner is disabled.
The lock-out error must be solved.
Contact your local Technical Assistance Centre

1717 ENGLISH
Warnings
The text “AttE” is displayed together with the alert number.
The equipment is not locked out, but its functions may be lim-
ited (according to the alert).
Contact your local Technical Assistance Centre
Temporary or short-term shut-down
In the event of temporary or short-term shut-down (e.g. due to
holidays), proceed as follows:
- Remove the power supply by setting the main switch
of the equipment and the main switch of the system to
"OFF".
- If there is a danger of frost, keep the system on. To re-
duce fuel consumption, set the heating set point to the
minimum allowed value.
Preparing for extended periods of disuse
If the appliance is not going to be used for a long period of
time, the following operations should be carried out:
set the main switch of the system to OFF and the main switch
of the equipment to (0);
- close the fuel cock and heating circuit water cock.
b
Drain the central heating circuit if there is any risk of
freezing.
Device cleaning and maintenance
Please remember that THE PERSON RESPONSIBLE FOR
SYSTEM MANAGEMENT MUST ENSURE THAT PROFES-
SIONALLY QUALIFIED HEATING ENGINEERS UNDERTAKE
PERIODIC MAINTENANCE AND COMBUSTION EFFICIENCY
MEASUREMENTS.
T’s Technical Assistance Centre is qualified to
satisfy these legal requirements and can also provide useful
information on MAINTENANCE PROGRAMMES designed to
guarantee:
- Greater safety
- Compliance with applicable legislation
- Freedom from the risk of fines in the event of spot
checks.
Regular maintenance is essential for the safety, efficiency and
durability of the boiler.
Servicing is a legal requirement and must be performed at
least once a year by a professionally qualified heating engi-
neer.
External cleaning
Clean the boiler’s casing panels and control panel with a soft
cloth damped in soapy water.
To remove marks from the boiler casing, use a cloth damped in
a 50% mix of water and denatured alcohol or a suitable clean-
ing product.
Wipe the boiler dry after cleaning it.
a
Do not use abrasive products, petrol or triethylene.
Annual cleaning
At least once a year, the user must have the boiler served by
T's Technical Assistance Service or by a qualified
heating engineer.

1818
ENGLISH
Troubleshooting
FAULT CAUSE SOLUTION
There is a smell of fumes Fumes escaping into the air - Contact your local Technical Assistan-
ce Centre
The generator is at temperature but
the heating system is cold
Air in the circuit - Contact your local Technical Assistan-
ce Centre
Pump malfunctioning - Contact your local Technical Assistan-
ce Centre
The boiler does not reach its tempera-
ture setpoint Boiler temperature setpoint
- Check the temperature setting
- Contact your local Technical Assistan-
ce Centre
The generator triggers a thermal safe-
ty block
Safety thermostat / delivery overtemper-
ature
- Contact your local Technical Assistan-
ce Centre
No water - Contact your local Technical Assistan-
ce Centre
The safety valve keeps opening
Incorrect central heating circuit pressure - Contact your local Technical Assistan-
ce Centre
CH expansion vessel - Contact your local Technical Assistan-
ce Centre
The circulator does not work
Pump seized
Electrical connections
- Contact your local Technical Assistan-
ce Centre
The request from the ambient thermostat
is missing
- Check the temperature set on the am-
bient thermostat
- Contact your local Technical Assistan-
ce Centre
Insufcient domestic hot water or
water not hot enough
Diverter valve or pump faulty - Contact your local Technical Assistan-
ce Centre
Domestic setpoint
- Check the temperature setting
- Contact your local Technical Assistan-
ce Centre

1919 ENGLISH
RECYCLING AND DISPOSAL
The device is primarily composed of:
Material Component
Metal materials Pipes, circulator, boiler body
ABS (acrylonitrile-butadi-
ene-styrene) Control panel enclosure
Glass wool felt Boiler body insulation
Electrical and electronic
components
Cables and wirings, regula-
tor, circulator
At the end of the life cycle, safely remove the components and
dispose of them in a responsible manner, in compliance with
the installation country's applicable environmental legislation.
b
Adequate sorted waste collection, processing and en-
vironmentally-friendly disposal contribute to preventing
possible negative impacts on the environment and health
and promote the reuse and/or recycling of the materials
of which the appliance consists.
b
Illegal disposal of the product by the owner shall be sub-
ject to administrative fines provided for by applicable
laws.

20180154 - Rev. 0 (05/20)
RIELLO S.p.A.
Via Ing. Pilade Riello, 7
37045 - Legnago (VR)
www.thermital.it
The manufacturer strives to continuously improve all products. Appearance, dimensions, technical
specications, standard equipment and accessories are therefore liable to modication without
notice.