thermital ACQUAHOME 32 B Manual

ACQUAHOME 32 B - 32 BS
INSTALLATION AND
MAINTENANCE MANUAL

2
ENGLISH
Dear heating engineer,
Congratulations on having chosen a Tboiler. You
have selected a modern, quality product that is designed to
give dependable, efficient and safe service and to provide
comfort in the home for many years to come.
This manual provides information that is essential to the in-
stallation of the appliance. Used in conjunction with your own
knowledge and expertise it will enable you to install the appli-
ance quickly, easily, and correctly.
Please accept our thanks and our congratulations on your
choice of product.
Thermital
CONFORMITY
ACQUAHOME 32 B - 32 BS boilers conform to the following di-
rectives:
- 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
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.
ENGLISH
RANGE
MODEL CODE
ACQUAHOME 32 B 20109806
ACQUAHOME 32 BS 20109807
ACCESSORIES
For a complete list of accessories and details of their compati-
bility, refer to the Catalogue.

This manual, Code 20114195 - Rev. 3 (07/16) comprises 60 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.
This manual, Code
- Rev.
comprises
pages.
GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . 4
General Safety Information. . . . . . . . . . . . . . . . . . . . . . . . . . 4
Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Description of the appliance . . . . . . . . . . . . . . . . . . . . . . . . 5
Safety devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Identification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
System layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Technical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Central heating system pump . . . . . . . . . . . . . . . . . . . . . . 10
Location of sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Unpacking the product . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Positioning of labels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Overall dimensions and weights . . . . . . . . . . . . . . . . . . . . 14
Moving and removing the packing. . . . . . . . . . . . . . . . . . . 15
Installation premises. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Recommended minimum distances. . . . . . . . . . . . . . . . . . 17
Installation in older systems and systems requiring
modernisation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Water connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Boiler water circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Typical water system schematics. . . . . . . . . . . . . . . . . . . . 19
Fuel connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Flue gas vent and comburent air intake. . . . . . . . . . . . . . . 21
Technical specifications of stack . . . . . . . . . . . . . . . . . . . . 22
Connection to the stack . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
System filling and emptying . . . . . . . . . . . . . . . . . . . . . . . . 23
Water quality requirements. . . . . . . . . . . . . . . . . . . . . . . . . 23
Filling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Emptying . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Wiring diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Electronic control unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Navigation scheme. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
COMMISSIONING AND MAINTENANCE . . . . . . . . 29
Preparing for initial startup . . . . . . . . . . . . . . . . . . . . . . . . . 29
Initial startup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Ignition failure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Resetting the burner and safety thermostat. . . . . . . . . . . . 30
Menu settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Checks during and after initial start-up . . . . . . . . . . . . . . . 36
Pump controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Burner control and adjustment. . . . . . . . . . . . . . . . . . . . . . 38
Temporary shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Preparing for extended periods of disuse . . . . . . . . . . . . . 47
Cleaning and servicing the boiler . . . . . . . . . . . . . . . . . . . 48
Annual cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Cleaning and maintaining the burner. . . . . . . . . . . . . . . . . 48
Cleaning the boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Checking and replacing the storage cylinder anode. . . . . 52
External cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Extraordinary cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Cleaning the storage cylinder . . . . . . . . . . . . . . . . . . . . . . 52
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
RECYCLING AND DISPOSAL . . . . . . . . . . . . . . . . 56

4
ENGLISH
GENERAL INFORMATION
General Safety Information
b
Check that the product is complete, undamaged and as
ordered as soon as you receive it. Report any discrepan-
cies or damage to the Tdealer who sold it.
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
The boiler must be serviced at least once a year.
b
Periodically check that pressure in the central heating
circuit, when cold, is approximately 1.5 bar and below
the maximum limit specified for the boiler.
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.
a
Do not touch the boiler while barefoot or wet.
a
Never clean or service the boiler without first discon-
necting it from the mains electricity supply by turning the
mains power switch and the control panel switch OFF.
a
Do not tamper with or adjust the safety or control devic-
es without prior authorisation and instructions from the
manufacturer.
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.

5ENGLISH
Description of the appliance
The ACQUAHOME 32 B - 32 BS boiler produces hot water for
central heating and also produces domestic hot water in an
integrated 110 litre storage cylinder.
It can function at low temperature and is oil fuelled.
The single stage oil burner has a horizontal steel combustion
chamber.
Model ACQUAHOME 32 BS (unlike model ACQUAHOME 32 B )
has a sealed chamber.
The boiler body is thoroughly and effectively insulated with a
layer of high density glass wool.
The ACQUAHOME 32 B - 32 BS boiler's control logic incorpo-
rates a total shutdown function to minimise energy consump-
tion:
- With the mode key set to "Summer", the burner only
starts up to restore the setpoint temperature of the wa-
ter in the storage cylinder;
- With the mode key set to "Winter", the burner starts
up in response to a heat request from the central heat-
ing system (i.e. when the room thermostat switches the
heating on) or to restore the setpoint temperature of the
water in the storage cylinder (DHW heat requests are
prioritised over central heating requests).
Safety devices
ACQUAHOME 32 B - 32 BS boilers incorporate the following
safety and control devices:
- A manual reset safety thermostat that forces a safe-
ty shutdown if boiler temperature exceeds the safety
threshold (100°C). The sensor used to monitor this tem-
perature is located on the body of the heat exchanger;
-
Sensors that measure the temperature of the boiler and
storage cylinder;
- An electronic burner controller that monitors the correct
functioning of the selected burner program and sends
a lockout signal to the control panel in the event of an
error.
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.
a
Do not use the boiler if any of its safety devices are faulty.
Always check that the boiler is functioning correctly after re-
pairs have been made.
Identication
The products are identified by:
Serial number plate
This is located on the boiler body and specifies the serial
number, model, and main technical specifications.
Mod.
Cod.
N°
Qn(max) kW
Pn(max) kW
bar
Pms
T067818GE
Via Mussa, 20 Z.I. - 35017 Piombino Dese (PD) - ITALY
Pms= bar T = °C
Qn(min)=
Pn(min)=
TIPO/TYP/TYP/TYPE/TIPO/TIPO:
COMBUSTIBILE/COMBUSTIBLE/BRENNSTOFF/BRANDSTOF/FUEL/COMBUSTIBLE/COMBUSTÍVEL:
Qn(max)=
Pn(max)=
Mod.
Cod.
N°
kW
kW
kW
IP
WV~Hz
PAESE DI DESTINAZIONE/PAYS DE DESTINATION/BESTIMMUNGSLAND/LAND VON BESTEMMING:
T067818GE
kW
Via Mussa, 20 Z.I. - 35017 Piombino Dese (PD) - ITALY
S
X
%
mg/kWh
NO
COUNTRY OF DESTINATION/PAÍS DE DESTINO/PAÍS DE DESTINO:
Data plate
This lists the technical specifications and performance of
the product.
DHW section
Central heating section
Qn Rated heat input
Pn Rated useful heat output
IP Electric degree of protection
Pmw Maximum operating pressure, DHW circuit
Pms Maximum operating pressure, CH circuit
T Temperature
ηEfficiency
D Specific flow rate
NOx NOx class
b
If these plates or any other means of clearly identifying
the product are defaced, removed or lost, proper instal-
lation and servicing may be rendered difficult.

6
ENGLISH
System layout
ACQUAHOME 32 B
5
6
4
7
8
9
10
2
3
11
12
24
25
26
13
15
16
17
18
19
14
20
21
22
23
1
1 Fuel oil filter
2 Control panel
3 Boiler sensor socket
4 Central heating circuit expansion vessel
5 Capillary pressure gauge fitting
6 Distribution manifold
7 Central heating circuit safety valve
8 Boiler drain cock
9 Storage cylinder fill cock
10 Fuel oil drip tray
11 Storage cylinder inspection flange
12 Storage cylinder flange insulation
13 Central heating circuit pump
14 Non-return valve
15 Boiler circulator
16 Boiler body
17 Flame inspection window
18 Oil burner
19 Storage cylinder expansion vessel
20 Storage cylinder with insulation
21 Storage cylinder sensor socket
22 Storage cylinder safety valve
23 Storage cylinder drain cock
24 Flue gas exhaust fitting
25 Flue gas box cover
26 Automatic bleed valve
27 Automatic vent valve bowl

7ENGLISH
ACQUAHOME 32 BS
24
25
26
5
6
4
7
8
9
10
2
3
11
12
13
15
16
17
18
19
14
20
21
22
23
27
28
1
1 Fuel oil filter
2 Control panel
3 Boiler sensor socket
4 Central heating circuit expansion vessel
5 Capillary pressure gauge fitting
6 Distribution manifold
7 Central heating circuit safety valve
8 Boiler drain cock
9 Storage cylinder fill cock
10 Fuel oil drip tray
11 Storage cylinder inspection flange
12 Storage cylinder flange insulation
13 Central heating circuit pump
14 Non-return valve
15 Boiler circulator
16 Boiler body
17 Flame inspection window
18 Oil burner
19 Storage cylinder expansion vessel
20 Storage cylinder with insulation
21 Storage cylinder sensor socket
22 Storage cylinder safety valve
23 Storage cylinder drain cock
24 Flue gas exhaust fitting
25 Flue gas box cover
26 Automatic bleed valve
27 Automatic vent valve bowl
28 Air intake fitting
29 Air box

8
ENGLISH
BURNER
3
11
9
5
6
12
2
7
8
10
1
4
1 Pump
2 Burner controller
3 Reset button with lockout indicator
4 Flange with seal
5 Air damper adjuster screw
6 Comburent air inlet ( ACQUAHOME 32 B )
7 Oil pump pressure adjuster screw
8 Pressure gauge fitting
9 Photoresistor
10 Combustion head
11 Motor
12 Comburent air inlet ( ACQUAHOME 32 BS )
OIL PUMP
7
6
5
4
3
2
1
8
1 Suction port
2 Return
3 By-pass screw
4 Pressure gauge fitting
5 Pressure adjuster screw
6 Vacuum gauge fitting
7 Valve
8 Auxiliary pressure measurement fitting

9ENGLISH
Technical specications
DESCRIPTION
ACQUAHOME
32 B
ACQUAHOME
32 BS
Device type
Mixed low temperature
heating
B23 C63
Fuel Heating fuel oil (light oil)
Rated heat input at furnace referred to HVC (LCV) 35,4 (33,4) 35,4 (33,4) kW
Useful (rated) heat output 32 32 kW
Maximum useful heat output P4 (60-80°C) 31,7 31,7 kW
30% heat output P1 with return at
37°C 9,5 9,5 kW
Seasonal energy efficiency in central heating mode B
Seasonal energy efficiency in DHW mode B
Seasonal energy efficiency in central heating mode ηs 87 87 %
Efficiency at rated heat output in high temperature
mode referred to HCV η4 Pn (60-80°C) 89,4 89,4 %
Efficiency at 30% rated heat output in low temperature
mode referred to HCV η1 with return at 37°C 91,6 91,6 %
Energy efficiency in DHW mode ηwh 73 73 %
Storage cylinder charging profile L L
Heat loss in standby mode Pstby 66 66 W
Combustion efficiency referred to LCV 96 96 %
Annual energy consumption QHE 104,8 104,8 GJ
Daily electrical energy consumption Qelec 0,1 0,1 kWh
Annual electrical energy consumption AEC 29 29 kWh
Daily fuel consumption Qfuel 26,3 26,3 kWh
Annual fuel consumption AFC 36 36 GJ
Noise level (sound power) LWA 61 59 dB(A)
Emissions at maximum heat input
NOx (referred to
HCV) 175 175 mg/kWh
CO212,5 %
CO w.a. < 20 20 ppm
Flue gas T At Pn (60-
80°C) 112 112 °C
Smoke scale < 0,5
Flue gas mass flow rate 12,00 12,00 g/s
Maximum working pressure 3 bar
Safety thermostat trip temperature 100 100 °C
Maximum operating temperature 55-82 °C
Minimum return temperature 37 °C
Boiler water capacity 44 44 l
Turbulators 31 31 l
Volume of expansion vessel (CH) 12 12 l
Precharge of expansion vessel (CH) 1,5 bar
Index of protection X0D IP
Power supply 230 V - 50 Hz V-Hz
Absorbed power supply (max) 153 153 W
Consumption at full load Elmax 100 100 W
Consumption at part load Elmin 37 37 W
Electrical consumption in standby mode P sb 12 12 W
LCV: Lower calorific value of fuel
HCV: Higher calorific value of fuel
Test conditions:
- Room temperature 22°C
- Atmospheric pressure 1018 mbar

10
ENGLISH
STORAGE CYLINDER CHARACTERISTICS ACQUAHOME 32 B - 32 BS
Type of storage cylinder Vitrified
Storage cylinder layout Horizontal
Heat exchanger layout Horizontal
Maximum power absorbed 28,5 kW
DHW temperature setting range 0-70°C °C
Storage cylinder capacity 110 l
Coil water capacity 4,2 l
Heat exchange surface area 0,98 m2
Domestic hot water production with ∆T 35°C (*) 700 l/h
Water draw in 10 minutes with storage cylinder at 48°C 160 l
Water draw in 10 minutes with storage cylinder at 60°C 190 l
Specific flow rate (EN 13203) 20 l/min
Replenishment time (∆T 35°C) 14 min
Maximum operating pressure of storage cylinder 6 bar
Volume of expansion vessel (DHW) 3 l
Precharge of expansion vessel (DHW) 3,5 bar
(*) Inlet water temperature 10°C and average outlet water temperature 45°C with coil inlet temperature of 80°C
Central heating system pump
DESCRIPTION ACQUAHOME 32 B - 32 BS
Electrical consumption 53 W
EEI Part 3 (**) ≤ 0,20
P L, Avg (***) ≤ 24 W
Minimum pressure at pump suction inlet 0,5 bar
(**) Energy efficiency rating according to regulations 641/2009-622/2012
(***) Approximate average annual electricity consumption according to regulations 641/2009-622/2012

11 ENGLISH
PUMP CURVES
ACQUAHOME 32 B - 32 BS
0
1
2
3
4
5
Q [m³/h]
6
7
[m]
H
0
10
20
30
40
50
60
[kPa]
p
0,0 0,1 0,2 0,3 0,4 0,5
0
Q [l/s]
10
20
30
40
50
[W]
P1
Residual head
Flow-rate
0,0 0,2 0,4 0,6 0,8 1,0 1,2 1,4 1,6 1,8 2,0
Q [m³/h]
0,0 0,2 0,4 0,6 0,8 1,0 1,2 1,4 1,6 1,8 2,0
The curves refer to a water density of 983.2 Kg/m3, a water temperature of +20°C, and a kinematic viscosity of 0.474 mm2/s
(0.474 cSt).

12
ENGLISH
Location of sensors
ACQUAHOME 32 B - 32 BS
TS
3
1
2
TS Safety thermostat sensor
1 Boiler sensor
2 Storage cylinder sensor
3 Boiler temperature gauge socket

13 ENGLISH
Control panel
ACQUAHOME 32 B - 32 BS
2 31
87 56 4
1 Function selector
Off
On
Burner reset
2 Electronic control unit
3 Boiler pressure gauge
Displays the pressure in the central heating circuit
4 Fuse holder
Holds the protective fuse 6.3 A-T
5 Indicator showing a burner lockout for a tripped safety thermostat (red)
Lights to show that the safety thermostat has tripped
6 Burner lockout indicator (red)
Lights to show that the burner locked out
7 Electrical power indicator (green)
Lights to show that the boiler is receiving electrical power
8 Manual reset for safety thermostat
Allows you to reset the boiler if the safety thermostat trips. Unscrew the protective cover to ac-
cess the reset button

14
ENGLISH
INSTALLATION
Unpacking the product
ACQUAHOME 32 B - 32 BS boilers are delivered on a pallet,
packed and protected by a wooden cage.
The following items are delivered in a plastic bag (1) inside
the boiler:
- User manual
- Installation and maintenance manual
- Spare parts catalogue
- Hydraulic test certificate
- Energy label
- Warranty certificate
-
Located inside the front panel:
- Fuel oil drip tray
Positioning of labels
A
A Packing label
b
The instruction manual is an integral part of the boiler.
Once located, read it thoroughly and keep it safe.
b
Keep the documentation envelope in a safe place. Any
replacement documents must be ordered from Thermital
who reserve the right to charge for the cost of the re-
placement.
Overall dimensions and weights
P
H
L
1
Description
ACQUAHOME
32 B
ACQUAHOME
32 BS
L 600 mm
P 760 mm
H 1470 mm
Net weight 220 224 kg

15 ENGLISH
Moving and removing the packing
b
Wear suitable personal protection equipment when mov-
ing the boiler and removing the packing. Only use lifting
equipment that is suitable for the weight involved.
Proceed as follows to remove the packing:
- Remove the staples (A) fixing the wooden cage (1) to
the pallet
A
1
- Lift off the wooden cage (1) or slide it off to the rear. (Pull
out the staples (B) and remove the front of the cage first
in order to slide it off to the rear.)
B
1
- Remove the polystyrene edge protectors (2)
- Pull off the protective bag (3).
2
3
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.
With the packing removed, remove the front panel (1).
1
Locate the bag containing the documentation, remove the en-
ergy label and apply it to the boiler casing.
32 kW
30 mm
25 mm

16
ENGLISH
Remove the packaging from the fuel oil drip tray (2).
2
Install the fuel oil drip tray under the burner.
To move the boiler manually, proceed as follows:
- Unscrew the screws (1) securing the boiler to the pallet;
1
1
- Lift the boiler by inserting two 1" diameter pipes (2)
through the lifting holes (3) at the rear;
3
2
- Reposition the front panel.
b
Take care because the boiler might swing when lifted.

17 ENGLISH
Installation premises
ACQUAHOME 32 B boilers can be installed in rooms with suita-
bly sized air vents conforming to the technical standards and
regulations applicable at the place of installation.
ACQUAHOME 32 BS boilers can be installed in any indoor lo-
cation provided the flue gases vent pipe and comburent air
pipe are connected to the outdoors. Under such conditions the
room does not require air vents.
b
When installing the boiler, allow sufficient space around
it to access all safety and control devices and to permit
easy maintenance.
b
Check that the appliance's electrical protection level is
suitable for the place of installation.
b
Make sure that comburent air is not contaminated by
substances containing chlorine or fluorine (elements
found in sprays, paints, detergents etc.).
a
These boilers must be installed indoors. They are not de-
signed for outside use.
a
Do not obstruct or restrict the air vents in the room where
the boiler is installed. A free air supply is essential for
correct combustion.
Recommended minimum distances
This figure shows the minimum installation distances that must
be respected in order to allow proper maintenance of the boil-
er.
≥ 1 m
≥ 1 m ≥ 1 m
≥ 0,5 m
≥ 0,5 m
(*)
(*)
(*) Vents needed for the ACQUAHOME 32 B boiler.
Installation in older systems and systems
requiring modernisation
When installing these boilers in older systems or systems re-
quiring modernisation, always perform the following checks:
- Make sure that the stack is able to withstand the tem-
perature of the combustion gases and that it has been
designed and made in compliance with applicable
standards. The stack must also be as straight as possi-
ble, sealed, insulated and not blocked or choked. See
the "Flue gas vent and comburent air intake" section for
further details.
- Make sure that the electrical supply system has been
installed by a qualified electrician in compliance with
applicable standards
- Make sure that the fuel feed line and any storage tank
are made and installed in compliance with applicable
standards
- Make sure that expansion vessels are big enough to
contain the additional volume generated by thermal ex-
pansion
- Make sure that the flow rate, head and direction of flow
of the pumps are suitable and correct
- Make sure that the central heating circuit has been
flushed out to remove all sludge and lime scale, and
that it has been bled and seal tested
- Make sure that a suitable water treatment system is in-
stalled if the quality of the supply/recirculation water so
demands. (Refer to the reference values on page 23);
See Thermital’s Catalogue
b
The manufacturer declines all responsibility for damage
caused by incorrectly constructed flue systems.

18
ENGLISH
Water connections
The following table gives the dimensions and positions of the
water fittings for ACQUAHOME 32 B - 32 BS boilers.
Before installing the boiler, flush out all the pipes of the central
heating circuit to remove any machining residues.
MI
RI
UACS
RC
EAFS
SC
G
A
B
C
D
E
F
DESCRIPTION
ACQUAHOME
32 B - 32 BS
A 80 mm
B 120 mm
C 210 mm
D 460 mm
E 1020 mm
F 1080 mm
G 45 mm
MI (CH flow) 1” M Ø
RI (CH return) 1” M Ø
UACS (domestic hot water outlet) 1/2" M Ø
RC (recirculation) 1/2" M Ø
SC (drain) 10 mm
EAFS (domestic cold water inlet) 1/2" M Ø
Boiler water circuit
CENTRAL HEATING RETURN
CENTRAL HEATING FLOW
DHW outlet
DHW circulation
Domestic cold water inlet
8
10
8
9
7
7
5
5
6
43
21
1 Boiler body
2 Automatic vent valve
3 Non-return valves
4 Pumps
5 Expansion vessel
6 Burner
7 Safety valve
8 Drain cock
9 Storage cylinder
10 Filling cock

19 ENGLISH
Typical water system schematics
Typical installation schematic
1
1
8
1 4 1
3
5
67
1 1
12
1 Disconnect valves
2 CH radiator
3 DHW circulation pump
4 Non-return valve
5 Pressure reducer
6 Safety valve drain
7 Central heating circuit and storage cylinder drains
8 DHW user
b
The safety valves must be connected to a suitable col-
lection and drain system.
b
The choice of system components and the method of
their installation are left up to the heating engineer in-
stalling the system. Installers must use their expertise to
ensure proper installation and functioning in conformity
to all applicable legislation.
b
If needed, water supplies and recovery circuits must be
conditioned by suitable treatment systems. Refer to the
values listed in the table on page 23.
a
It is prohibited to operate the circulators without water.
Fuel connections
The fuel oil supply pipe must be connected directly to the filter
(1) and the return pipe to the fitting (2).
Make sure that these connections are oil tight.
640
675
2
1
Description
ACQUAHOME
32 B
ACQUAHOME
32 BS
Fittings 2x3/8" M Ø
If the oil feed system is in negative pressure, the return line
must reach the same height as the suction line. This avoids
having to install a bottom valve, which would be essential if
the return hose were to be located above the level of the fuel.
b
The installer must ensure that the negative pressure dif-
ferential in the oil feed never exceeds 0.4 bar (30 cm
Hg). If this value is exceeded, the fuel oil will release gas.
Make sure that the oil hoses are perfectly oil-tight.
b
Clean out the oil tank at suitable intervals.
b
The oil feed line must be suitable for the flow rate de-
manded by the burner. The oil feed system must also be
equipped with all the necessary safety and control devic-
es required by applicable legislation and standards. Re-
fer to the table alongside for oil feed line characteristics.
b
A filter must be installed in the oil feed line.
b
Make sure that the oil return line is not kinked or blocked
before starting up the boiler. Excessive back-pressure
can cause the pump seal to fail.

20
ENGLISH
Priming the pump
To prime the oil pump simply start up the burner and check
for a flame.
If the burner enters lockout before any fuel reaches it, wait at
least 20 seconds then turn the function selector to "Reset
burner" for at least 1 second before returning it to its original
position. Wait for the burner to complete the entire ignition cy-
cle again, up to the ignition of the flame.
(*)
max. 4 m
H
H
(*) Automatic shut-off device (if fitted). For details of the
electrical connections, see the “Automatic shut-off de-
vice (DAI)” section on page 25.
H (m) L (m)
Øi (8mm) Øi (10mm)
0 35 100
0,5 30 100
1 25 100
1,5 20 90
2 15 70
3 8 30
3,5 6 20
H = Height difference
L = Maximum length of suction hose
Øi = Internal diameter of hose
1 Suction port
2 Return
3 By-pass screw
4 Pressure gauge fitting
5 Pressure adjuster screw
6 Vacuum gauge fitting
7 Valve
8 Auxiliary pressure measurement fitting
7 6 5 4 3 2
1
8