Ferroli FORCE W Troubleshooting guide


cod. 3541Q760 — Rev. 00 - 01/2019
cod. 3541Q760 — Rev. 00 - 01/2019
FORCE W
4
(1 INSTRUCTIONS FOR USE, INSTALLATION AND MAINTENANCE
FORCE W

FORCE W
126 EN
B
The CE marking certifies that the products meet the essential requirements of the rele-
vant directives in force.
The declaration of conformity may be requested from the manufacturer.
COUNTRIES OF DESTINATION: IT - ES - RO
This symbol indicates “CAUTION” and is placed next to all safety warnings. Strictly follow these instructions in order to avoid
danger and damage to persons, animals and things
This symbols calls attention to a note or important notice.
This symbol, which is used on the product, packaging or documents, means that at the end of its useful life, this product must
not be collected, recycled or disposed of together with domestic waste.
Improper management of electric or electronic waste can lead to the leakage of hazardous substances contained in the pro-
duct. For the purpose of preventing damage to health or the environment, users are kindly asked to separate this equipment
from other types of waste and to ask for it to be dealt with by the municipal waste service or dealer under the conditions and
according to the methods set down in national and international laws transposing the Directive 2012/19/EU.
Separate waste collection and recycling of unused equipment helps to save natural resources and to guarantee that this waste
is processed in a manner that is safe for health and the environment.
For more information about how to collect electric and electronic equipment and appliances, please contact your local Council
or Public Authority competent to issue the relevant permits.
cod. 3541Q760 - Rev. 00 - 01/2019
• Read the warnings in this instruction booklet ca-
refully since they provide important information
on safe installation, use and maintenance.
• This instruction booklet is an integral and essen-
tial part of the product and must be kept with
care by the user for future reference.
• If the unit is sold or transferred to another owner
or if it is to be moved, always make sure the bo-
oklet stays with the boiler so that it can be con-
sulted by the new owner and/or installer.
• Installation and maintenance must be carried
out by professionally qualified personnel, accor-
ding to current regulations and the manufactu-
rer's instructions.
• Incorrect installation or inadequate maintenance
can result in damage or injury. The manufactu-
rer declines any liability for damage caused by
errors in installation and use or by failure to fo-
llow the instructions provided.
• Before carrying out any cleaning or maintenan-
ce operation, disconnect the unit from the power
supply using the system switch and/or the spe-
cial cut-off devices.
• In case of a fault and/or poor operation, deacti-
vate the unit and do not try to repair it or directly
intervene. Contact professionally qualified per-
sonnel. Any repair/replacement of the products
must only be carried out by qualified personnel
using genuine parts. Failure to comply with the
above can compromise the safety of the unit.
• Periodic maintenance performed by qualified
personnel is essential in order to ensure proper
operation of the unit.
• This unit must only be used for its intended pur-
pose. Any other use is deemed improper and
therefore hazardous.
• After unpacking, check the good condition of the
contents. The packing materials are potentially
hazardous and must not be left within the reach
of children.
• The unit can be used by children aged at least 8
years and by persons with reduced physical,
sensory or mental capabilities, or lacking expe-
rience or the necessary knowledge, only if under
supervision or they have received instructions
on its safe use and the related risks. Children
must not play with the unit. Cleaning and main-
tenance intended to be done by the user can be
carried out by children aged at least 8 years only
if under supervision.
• In case of doubt, do not use the unit. Contact the
supplier.
• The unit and its accessories must be appropria-
tely disposed of in compliance with current regu-
lations.
• The images given in this manual are a simplified
representation of the product. In this representa-
tion there may be slight and insignificant diffe-
rences with respect to the product supplied.

FORCE W
127
cod. 3541Q760 - Rev. 00 - 01/2019
1 Operating instructions ........................................................................................................128
1.1 Introduction.........................................................................................................................................128
1.2 Control panel ......................................................................................................................................128
1.3 Lighting and shutdown .......................................................................................................................133
1.4 Adjustments........................................................................................................................................135
2 Installation............................................................................................................................ 144
2.1 General Instructions ...........................................................................................................................144
2.2 Place of installation ............................................................................................................................144
2.3 Plumbing connections ........................................................................................................................144
2.4 Gas connection ..................................................................................................................................159
2.5 Electrical connections.........................................................................................................................159
2.6 Fume ducts.........................................................................................................................................161
2.7 Condensate drain connection.............................................................................................................162
3 Service and maintenance.................................................................................................... 163
3.1 Adjustments........................................................................................................................................163
3.2 Commissioning...................................................................................................................................169
3.3 Maintenance.......................................................................................................................................170
3.4 Troubleshooting..................................................................................................................................172
4 Technical data and characteristics .................................................................................... 174
4.1 Dimensions and connections .............................................................................................................175
4.2 General view ......................................................................................................................................176
4.3 Hydraulic circuit .................................................................................................................................. 177
4.4 Technical data table ...........................................................................................................................178
4.5 ErP tables...........................................................................................................................................179
4.6 Diagrams ............................................................................................................................................184
4.7 Wiring diagrams .................................................................................................................................185

FORCE W
128 EN
cod. 3541Q760 - Rev. 00 - 01/2019
1. Operating instructions
1.1 Introduction
Dear Customer,
Thank you for choosing FORCE W, a FERROLI wall-mounted boiler featuring advanced design, cutting-edge techno-
logy, high reliability and quality construction. Please read this manual carefully, as it provides important information on
safe installation, use and maintenance.
FORCE W is a high efficiency, low emissions premix condensing heat generator for heating, running on natural gas
or LPG and equipped with a microprocessor control system.
The boiler body consists of an aluminum tube exchanger and a premix burner in steel, equipped with electronic igni-
tion and ionization flame control, a modulating speed fan and a modulating gas valve.
1.2 Control panel
fig. 1 - Control panel
Legend
1 = Contextual button 1
2 = Contextual button 2
3 = Contextual button 3
4 = Dot matrix display (example - main screen)
5 = Menu navigation button
6 = Confirm/menu access button
7 = Menu navigation button
8 = Automatic/Manual Heating/DHW button
9 = Summer/Winter mode selection button
10 = Economy/Comfort mode selection button
11 = Menu exit button
12 = Main menu button
13 = Home button (back to main screen)
14 = Main switch
M
88°C
23°C
60°C 40°C
Thursday 9 Jan. 2014 00:15:60
14
41 2 65 8 119 12
371013
S

FORCE W
129EN cod. 3541Q760 - Rev. 00 - 01/2019
Contextual button
The contextual buttons (details 1, 2, 3 - fig. 1) are grey, with no screen print, and take on a different meaning depending
on the menu selected. It is essential to observe the indication provided by the display (icons and text). In fig. 1 for exam-
ple, using the contextual button 2 (detail 2 - fig. 1) it is possible access unit information such as: temperature of sensors,
work power, etc.
Direct buttons
The direct buttons (details 8, 9, 10 - fig. 1) always have the same function.
Menu/navigation buttons
The menu/navigation buttons (details 5, 6, 7, 11, 12, 13 - fig. 1) are used to navigate among the various menus imple-
mented in the control panel.
Menu structure
From the main screen (Home), press the Main menu button (detail 12 - fig. 1).
Access the "User" menu by pressing the contextual button 1 (detail 1 - fig. 1). Then use the "menu/navigation" buttons
to access the various levels described in the following table.
USER MENU
HEATING
Adjustment Temp See fig. 12
Reduction Adjustment Temp See fig. 13
Sliding Temperature
Curve1 See fig. 26
Offset1 See fig. 27
Outside Temp Heat Off See page 142
Curve2 /
Offset2 /
Time Program See “Time programming” on page 137
DOMESTIC HOT WATER
Adjustment Temp See fig. 14
Reduction Adjustment Temp See fig. 15
Legionella See “Legionella programming (with optional hot water tank insta-
lled)” on page 140
Time Program See “Time programming” on page 137
USER
TECHNICIAN
MENU
1
12

FORCE W
130 EN
cod. 3541Q760 - Rev. 00 - 01/2019
Indication during operation
Heating
A heating demand (generated by the Room Thermostat, Remote Timer Control or 0-10 Vdc signal) is indicated by ac-
tivation of the circulating pump and by the hot air above the radiator (fig. 2).
HOLIDAY FUNCTION
See “Holiday Function” on page 140
MAINTENANCE
Test mode
Test mode See fig. 58
Gas Type Selection See fig. 55
Cascade Test Mode
Service Information See “Service Information” on page 140
Service Intervention Date See “Service Intervention Date” on page 140
SETTINGS
Language See fig. 7
Unit of Measure /
Set Date See fig. 8
Set Time See fig. 9
Configuration “Heating only/Double circulating pump”
fig. 2
Configuration “Circulating pump and 3-way valve”
fig. 3
Thursday 9 Jan. 2014 11:25:40
23°C --
Thursday 9 Jan. 2014 11:25:40
23°C
32°C

FORCE W
131EN cod. 3541Q760 - Rev. 00 - 01/2019
DHW (with optional hot water tank installed)
A hot water tank heating demand is indicated by activation of the drop under the tap (fig. 4 and fig. 5).
Exclude hot water tank (economy)
Hot water tank temperature maintaining/heating can be excluded by the user. In case of exclusion, there will be no de-
livery of domestic hot water. The hot water tank can be deactivated by the user (ECO mode) by pressing the eco/
comfort button (detail 10 - fig. 1). In ECO mode, the display activates the symbol . To activate the COMFORT mode,
press the eco/comfort button (detail 10 - fig. 1) again.
fig. 6 - Economy
Configuration “Double circulating pump”
fig. 4
Configuration “Circulating pump and 3-way valve”
fig. 5
Thursday 9 Jan. 2014 11:28:22
23°C 32°C
Thursday 9 Jan. 2014 11:29:27
23°C 32°C
Thursday 9 Jan. 2014 11:30:43
23°C 32°C

FORCE W
132 EN
cod. 3541Q760 - Rev. 00 - 01/2019
Information
From the main screen (Home), press the contextual button 2 (detail 2 - fig. 1). Then use the "Menu Navigation" buttons
to display the following values:
Heating demand
OT - OpenTherm control request
TA - Room thermostat request
0-10Vdc - 0-10Vdc signal request
TA2 - Second room thermostat request
Heating circulating pump ON/OFF
Heating 3-way valve ON/OFF
DHW 3-way valve ON/OFF
Standby time ON/OFF
T Delta protection ON/OFF
Flame Supervisor ON/OFF
Heating sensor1 °C
Safety sensor °C
Return sensor °C
DHW sensor °C
External probe °C
Fume sensor °C
Cascade heating sensor °C
Fan frequency Hz
Burner load %
System water pressure 1.4bar = ON, 0.0 bar = OFF
Modulating circulating pump %
Cascade modulating circulating pump %
Ionization current uA
Input 0-10Vdc Vdc
Heating adjustment temperature Setpoint (°C)
Power level adjustment 0-10Vdc Setpoint (%)

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133EN cod. 3541Q760 - Rev. 00 - 01/2019
1.3 Lighting and shutdown
Boiler lighting
Press the On/Off button (detail 14 - fig. 1).
fig. 7 - Boiler lighting
Press the contextual button 1 to select the language, confirming it by pressing "OK".
Press the contextual button 3 to stop FH mode.
If none of the two selections described above is made, proceed as follows.
• For the following 300 seconds the display will show FH which identifies the heating system air venting cycle.
• The display also shows the firmware version of the cards.
• Open the gas cock ahead of the boiler.
• When the message FH disappears, the boiler is ready to operate automatically in case of a room thermostat demand.
Settings
Contrast adjustment
To adjust the display contrast, press the contextual button 2 and the OK button together. Then press the button ref.
5 of fig. 1 to increase the contrast or the button ref. 7 of fig. 1 to decrease it.
Setting the Date and Time
Reach the screen shown in fig. 8, navigating in the menu and following the path "USER MENU “Settings” "Date
Setting”. Press the navigation buttons 5 and 7 to select the value and modify it with the contextual buttons 1 and 2. Con-
firm with the OK button.
fig. 8 - Setting the Date
isplay v.01
Burner Controller 1 v.01
to confirm
Set date
24 / 09
2013
to select
5
7
1
2

FORCE W
134 EN
cod. 3541Q760 - Rev. 00 - 01/2019
Reach the screen shown in fig. 9, navigating in the menu and following the path "USER MENU “Settings” “Time
Setting”. Press the navigation buttons 5 and 7 to select the value and modify it with the contextual buttons 1 and 2. Con-
firm with the OK button.
fig. 9 - Setting the Time
Boiler shutdown
From the main screen/Home, press the contextual button and confirm with the button .
fig. 10 - Boiler shutdown
When the boiler is shut down, the PCB is still powered.
DHW mode (with optional hot water tank installed) and heating mode are disabled. The frost protection system remains
activated.
To relight the boiler, press the contextual button again .
The boiler will be immediately ready to operate whenever domestic hot water is drawn (with optional hot water tank ins-
talled) or when there is a room thermostat demand.
To completely disconnect the power supply to the unit, press the button detail 14 fig. 1.
BThe frost protection system does not work when the power and/or gas to the unit
are turned off. To avoid damage caused by freezing during long shutdowns in win-
ter, it is advisable to drain all water from the boiler, the DHW circuit and the heating
system water; or drain just the DHW circuit and add a suitable antifreeze to the
heating system, as prescribed in sec. 2.3.
to confirm
Set time
15 : 59
to select
5
7
1
2
Thursday 9 Jan. 2014 00:15:60

FORCE W
135EN cod. 3541Q760 - Rev. 00 - 01/2019
1.4 Adjustments
Summer/Winter Switchover
Press the button (detail 9 - fig. 1) for 1 second.
The display activates the symbol Summer . The heating function is deactivated, whereas the possible production of do-
mestic hot water (with optional external hot water tank) remains activated. The frost protection system remains activated.
To deactivate Summer mode, press the button (detail 9 - fig. 1) again for 1 second.
fig. 11 - Summer
Heating temperature adjustment
Access the menu “Adjustment Temp” to vary the temperature from a minimum of 20°C to a maximum of 80°C. Confirm
with the OK button.
fig. 12
BThe boiler is sold with time program not activated. Therefore, if requested, this is
the setpoint value.
Thursday 9 Jan. 2014 11:33:03
23°C 32°C
CH setpoint
to confirm
80

FORCE W
136 EN
cod. 3541Q760 - Rev. 00 - 01/2019
Heating temperature reduction
Access the menu “Reduction Adjustment Temp” to vary the temperature from a minimum of 0°C to a maximum of
50°. Confirm with the OK button.
fig. 13
AThis parameter is used only if time programming is activated. See *** 'Time programming' on page 137 ***
DHW temperature reduction adjustment (with optional hot water tank installed)
Access the menu “Adjustment Temp” to vary the temperature from a minimum of 10°C to a maximum of 65°C. Confirm
with the OK button.
fig. 14
BThe boiler is sold with time program not activated. Therefore, if requested, this is
the setpoint value.
DHW temperature reduction (with optional hot water tank installed)
Access the menu “Reduction Adjustment Temp” to vary the temperature from a minimum of 0°C to a maximum of
50°C. Confirm with the OK button.
fig. 15
AThis parameter is used only if time programming is activated. See *** 'Time programming' on page 137 ***
CH setpoint reduction
to confirm
35
to confirm
CH setpoint
65
to confirm
DHW setpoint reduction
25

FORCE W
137EN cod. 3541Q760 - Rev. 00 - 01/2019
Time programming
Programming the time is done in the same way both for heating and for DHW; the two programs are independent.
To program Heating access the "Time Program" menu following the path "USER MENU “HEATING” “Time Program”.
To program Domestic hot water (DHW) access the "Time Program" menu following the path "USER MENU “DO-
MESTIC HOT WATER” “Time Program”.
Choose the desired type of programming and follow the instructions given below.
Select the day (fig. 16) or the interval of days to be programmed (fig. 17) and confirm with the OK button.
The program is weekly, which means that 6 independent time bands can be set for each day of the week (fig. 18); 4
options can be selected for each time band:
•ON. In case of a Heating/DHW demand, the boiler works at the set Heating/DHW (fig. 12/fig. 14) Adjustment Tem-
perature.
• In case of a Heating/DHW demand, the boiler works at the Reduced Adjustment Temperature. The Reduced tem-
perature is obtained by subtracting the Reduction Adjustment Temperature value (fig. 13/fig. 15) from the set Hea-
ting/DHW Adjustment Temperature (fig. 12/fig. 14).
•OFF. In case of a Heating/DHW demand, the boiler will not activate the Heating/DHW mode.
•-- : -- OFF. Time band disabled.
AThe boiler is sold with time program not activated. In fact, every day it will be programmed from 00:00h to
24:00h in ON mode (fig. 18).
First, set the start time of the first time band (fig. 18) using the contextual buttons 1 and 2.
fig. 18
fig. 16 fig. 17
to confirm
Scheduler Set
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Monday-Sunday
Monday
5
7
to confirm
Scheduler Set
Thursday
Friday
Sunday
Monday-Sunday
Monday-Friday
Saturday-Sunday
Wednesday
Saturday
5
7
to confirm
Scheduler Set
2.
3.
4.
5.
6.
1.
Save & Exit
Copy to the Next Day
00:00 - 24:00
--:-- - --:--
--:-- - --:--
--:-- - --:--
--:-- - --:--
--:-- - --:--
1
2

FORCE W
138 EN
cod. 3541Q760 - Rev. 00 - 01/2019
Press the navigation button 7 to move to the end time of the first time band (fig. 19) and set it to the desired value using
the contextual buttons 1 and 2.
fig. 19
Press the navigation button 7 and use the contextual buttons 1 and 2 to set the work mode during the first time band ( fig. 20 )
fig. 20
Then, press the navigation button 7 to set (if necessary) the next time bands (fig. 21, fig. 22 and fig. 23).
fig. 21
to confirm
Scheduler Set
2.
3.
4.
5.
6.
1.
Save & Exit
Copy to the Next Day
--:-- - --:--
--:-- - --:--
--:-- - --:--
--:-- - --:--
--:-- - --:--
06:00 - 16:00
7
1
2
to confirm
Scheduler Set
2.
3.
4.
5.
6.
1.
Save & Exit
Copy to the Next Day
--:-- - --:--
--:-- - --:--
--:-- - --:--
--:-- - --:--
--:-- - --:--
06:00 - 16:00
7
1
2
to confirm
Scheduler Set
2.
3.
4.
5.
6.
1.
Save & Exit
Copy to the Next Day
16:00 - 21:00
--:-- - --:--
--:-- - --:--
--:-- - --:--
--:-- - --:--
06:00 - 16:00
7
1
2

FORCE W
139EN cod. 3541Q760 - Rev. 00 - 01/2019
fig. 22
fig. 23
When the day has been programmed, press the OK button; the item "Save & exit" will be automatically selected (fig. 24).
Use the navigation buttons 5 and 7 to change the previous settings, or press OK to confirm: in this case the display will
again show the day (fig. 16) or the interval of days to be programmed (fig. 17). The same procedure can therefore be
followed to complete the desired weekly program.
fig. 24
To program the next day in the same way, select “Copy to next day” and press OK to confirm (fig. 24).
to confirm
Scheduler Set
2.
3.
4.
5.
6.
1.
Save & Exit
Copy to the Next Day
16:00 - 21:00
--:-- - --:--
--:-- - --:--
--:-- - --:--
--:-- - --:--
06:00 - 16:00
7
1
2
to confirm
Scheduler Set
2.
3.
4.
5.
6.
1.
Save & Exit
Copy to the Next Day
16:00 - 21:00
21:00 - 06:00
--:-- - --:--
--:-- - --:--
--:-- - --:--
06:00 - 16:00
7
6
5
to confirm
Scheduler Set
2.
3.
4.
5.
6.
1.
Copy to the Next Day
16:00 - 21:00
21:00 - 06:00
--:-- - --:--
--:-- - --:--
--:-- - --:--
06:00 - 16:00
Save & Exit

FORCE W
140 EN
cod. 3541Q760 - Rev. 00 - 01/2019
ATo reset the time program to the default values, press the contextual button 3 in the Time Program menu
(fig. 25) and confirm with OK.
fig. 25
AThe two Heating and DHW time programs are independent even in case of resetting to default values.
Legionella programming (with optional hot water tank installed)
This function must be activated by enabling an installer parameter.
Access the "Legionella" menu through the path "USER MENU “DOMESTIC HOT WATER” “Legionella” to set:
•Antilegionella Day. Defines the day of the week during which the function will be activated.
•Time of Antilegionella Day. Defines the function start time.
•Antilegionella Duration. Defines the duration (in minutes) of the function.
•Antilegionella Adjustment Temp.. Defines the DHW Adjustment temperature during the function.
Holiday Function
Access the "HOLIDAY FUNCTION" menu through the path "USER MENU “HOLIDAY FUNCTION” to set:
• Holiday start date.
• Holiday end date.
The display can activate two types of icons:
• - The Holiday function is programmed but not yet active.
• - The Holiday function is in progress. The boiler will behave as if Summer mode and Economy mode were active
(with optional hot water tank installed).
The frost protection and Legionella functions will remain active (if activated).
Service Intervention Date
This informs when the alert of programmed maintenance by the technician will be activated. It does not represent an
alarm or a fault but just a notice. After that date, whenever the Main menu is accessed, the boiler will activate a screen
indicating that programmed maintenance is due.
Service Information
This information shows the telephone number to contact in case of assistance (if programmed by the technician).
Room temperature adjustment (with optional room thermostat)
Using the room thermostat, set the temperature required in the rooms.
Room temperature adjustment (with optional remote timer control)
Using the remote timer control, set the temperature desired in the rooms. The boiler unit will set the system water ac-
cording to the required room temperature. For information on the remote timer control, please refer to its user's manual.
to confirm
Scheduler Set
Tuesday
Wednesdey
Thursday
Friday
Saturday
Sunday
Monday-Sunday
Monday
3

FORCE W
141EN cod. 3541Q760 - Rev. 00 - 01/2019
Sliding temperature
When an external probe (optional) is installed, the corresponding symbol of the outside temperature is activated on the
control panel display. The boiler adjustment system works with "Sliding Temperature". In this mode, the temperature of
the heating system is adjusted according to the outside weather conditions, to ensure a high level of comfort and energy
saving throughout the year. In particular, as the outside temperature increases, the system delivery temperature de-
creases according to a specific "compensation curve".
With Sliding Temperature adjustment, the "Heating adjustment" temperature becomes the maximum system delivery
temperature. It is advisable to set a maximum value to allow system adjustment throughout its useful operating range.
The boiler must be adjusted at the time of installation by qualified personnel. Adjustments can in any case be made by
the user to improve comfort.
Compensation curve and curve offset
Access the Sliding Temperature menu. Adjust the required curve from 1 to 10 according to the characteristic (fig. 28)
through the parameter “Curve1” and confirm with the OK button.
By setting the curve to 0, the sliding temperature adjustment is disabled.
fig. 26 - Compensation curve
Adjust the parallel offset of the curves from 20 to 60 °C (fig. 29), through the parameter “Offset1” and confirm with the
OK button.
fig. 27 - Curve parallel offset
OTC Curve 1
to confirm
1
OTC Offset 1
to confirm
40

FORCE W
142 EN
cod. 3541Q760 - Rev. 00 - 01/2019
If the room temperature is lower than the required value, it is advisable to set a higher order curve and vice versa. Pro-
ceed by increasing or decreasing in steps of one and check the result in the room.
fig. 28 - Compensation curves
fig. 29 - Example of parallel offset of compensation curves
AThis parameter is used only if time programming has been activated. See *** 'Time programming' on page 137
***
Outside Temperature Heating OFF
Access the “Out Temp Heat Off” to activate the function: between 7°C and 30°C.
If activated, this function will deactivate the heating demand whenever the temperature measured by the external probe
is higher than the programmed value.
The heating demand will be reactivated as soon as the temperature measured by the external probe is lower than the
programmed value.
Adjustments from remote timer control
AIf the Remote Timer Control (optional) is connected to the boiler, the above adjustments are managed accor-
ding to that given in table 1.
Table. 1
Heating temperature adjustment The adjustment can be made from the Remote Timer Control menu and the boiler control panel.
DHW temperature adjustment (with
optional hot water tank installed)
The adjustment can be made from the Remote Timer Control menu and the boiler control panel.
Summer/Winter Switchover Summer mode has priority over a possible Remote Timer Control heating demand.
Eco/Comfort selection (with optional hot
water tank installed)
On disabling DHW from the Remote Timer Control menu, the boiler will select the Economy
mode. In this condition, the button detail 10 - fig. 1 on the boiler panel is disabled.
On enabling DHW from the Remote Timer Control menu, the boiler will select the Comfort
mode. In this condition, with the button detail 10 - fig. 1 on the boiler panel it is possible to select
one of two modes.
Sliding Temperature Both the Remote Timer Control and the boiler card manage Sliding Temperature adjustment:
Sliding Temperature overrides the boiler card.
20
30
40
50
60
70
80
90
85
20 10 0 -10 -20
1
2
3
4
5
68910 7
20
30
40
50
60
70
80
90
85
20
30
40
50
60
70
80
90
85
1
2
3
4
5
6
8910 7
1
2
3
4
5
6
8
9
10 7
OFFSET = 20 OFFSET = 60

FORCE W
143EN cod. 3541Q760 - Rev. 00 - 01/2019
System water pressure adjustment
The filling pressure with the system cold must be approx. 1.0 bar. If the system pressure falls to values below minimum,
the boiler card will activate fault 37 and the number of the module (fig. 30).
fig. 30 - Module 1 insufficient system pressure fault
AOnce the system pressure is restored, the boiler will activate the 300-second air venting cycle indicated on the
display by FH.
Nr:37
rc:1

FORCE W
144 EN
cod. 3541Q760 - Rev. 00 - 01/2019
2. Installation
2.1 General Instructions
BOILER INSTALLATION MUST ONLY BE PERFORMED BY QUALIFIED PERSONNEL, IN ACCORDANCE WITH
ALL THE INSTRUCTIONS GIVEN IN THIS TECHNICAL MANUAL, THE PROVISIONS OF CURRENT LAW, THE
PRESCRIPTIONS OF NATIONAL AND LOCAL STANDARDS AND THE RULES OF PROPER WORKMANSHIP.
2.2 Place of installation
The generator must be installed in a suitable room with ventilation openings towards the outside in conformity with cu-
rrent regulations. If there are several burners or exhausters that can work together in the same room, the ventilation
openings must be sized for simultaneous operation of all the units. The place of installation must be free of flammable
materials or objects, corrosive gases, powders or volatile substances. The room must be dry and not exposed to rain,
snow or frost.
AIf the unit is enclosed in a cabinet or mounted alongside, there must be sufficient space for removing the casing
and for normal maintenance activities
2.3 Plumbing connections
Important
The heating capacity of the unit must be previously established by calculating the building's heat requirement according
to current regulations. The system must be provided with all the components for correct and regular operation. In par-
ticular, provide for all the protection and safety devices required by current regulations for the complete modular gene-
rator. They must be installed on the hot water circuit delivery piping, immediately after the last module, within a distance
of not more than 0.5 m. and with no shutoff devices in between. The unit is not supplied with an expansion tank; its
connection must therefore be carried out by the Installer.
Do not use the water system pipes to earth electrical appliances.
Before installation, flush all the pipes of the system thoroughly to remove any residuals or impurities that could affect
proper operation of the unit.
BAlso, a filter must be installed on the system return piping to prevent impurities or
sludge from the system clogging and damaging the heat generators.
The filter must be installed when replacing generators in existing systems. The ma-
nufacturer declines any liability for damage caused to the generator by failure to
install or inadequate installation of this filter.
Carry out the relevant connections according to the diagram in sec. 4.1 and the symbols on the unit.