thermital ACQUAHOME 25 B BLU User manual

ACQUAHOME 25 B BLU
USER MANUAL

2
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 25 B
BLU
boiler.
Please accept our renewed thanks for your purchase
Thermital
CONFORMITY
ACQUAHOME 25 B BLU boilers conform to the following direc-
tives:
- 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
- Energy Labelling Directive 2010/30/EU
- Delegated Regulation (EU) N. 811/2013
- Delegated Regulation (EU) N. 813/2013
- Delegated Regulation (EU) N. 814/2013
ENGLISH

This manual, Code 20129620 - Rev. 0 (07/18) comprises 20 pages.
3ENGLISH
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
Adjustment of domestic setpoint . . . . . . . . . . . . . . . . . . . . 15
Enable/disable the domestic function . . . . . . . . . . . . . . . . 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 . . . . . . . . . . . . . . . . 18

4
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.

5ENGLISH
Description of the appliance
The thermal unit ACQUAHOME 25 B BLU is a hot water genera-
tor for the heating of environments and production of domestic
hot water (DHW) by means of a vitrified heater. It can function
at low temperature and is oil fuelled. The low NOx burner fea-
tures 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 compliance with the regula-
tions in force.
Safety and control devices
The control panel, apart from managing the functions of the
thermal unit ACQUAHOME 25 B BLU , allows to highlight any
anomaly 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 probe (heater) : the immer-
sion probe in the heater is used by the regulator to view
and check the domestic hot water temperature and to
manage the relevant operating parameters (DHW Set-
point, DHW request, etc.).
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.

6
ENGLISH
System layout
ACQUAHOME 25 B BLU
7
1
2
8
9
11
10
13
12
20
21
22
23
6
14
16
17
18
19
5
4
3
15
1 Electric actuator
2 3-way diverting valve
3 Main switch
4 Heating safety valve
5 Storage cylinder expansion vessel
6 Control panel
7 Heating expansion reservoir
8 Burner
9 Boiler drain cock
10 Magnesium anode
11 Storage cylinder inspection flange
12 Storage cylinder flange insulation
13 Storage cylinder drain cock
14 Storage cylinder safety valve
15 Storage cylinder fill cock
16 Storage cylinder with insulation
17 Flame inspection window
18 Boiler body
19 Pump
20 Flue gas exhaust fitting
21 Flue gas box cover
22 Lifting bracket
23 Automatic bleed valve

7ENGLISH
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

8
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" or "Manufacturer" 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

9ENGLISH
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

10
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