Ferroli ENERGY TOP W 70 Troubleshooting guide

3540M640
cod. 3540M640 — 07/2008 (Rev. 00)
ENERGY TOP W 70
INSTRUCTIONS FOR USE, INSTALLATION AND MAINTENANCE
INSTRUCTIONS D'UTILISATION, D'INSTALLATION ET D'ENTRETIEN
ISTRUZIONE PER L’USO L'INSTALLAZIONE E LA MANUTENZIONE
INSTRUCCIONES DE USO, INSTALACIÓN Y MANTENIMIENTO
BETRIEBS-, INSTALLATIONS- UND WARTUNGSANLEITUNG

ENERGY TOP W 70
2EN
B
Declaration of conformity
Manufacturer: FERROLI S.p.A.
Address: Via Ritonda 78/a 37047 San Bonifacio VR Italy
declares that this unit complies with the following EU directives:
• Gas Appliance Directive 90/396
• Efficiency Directive 92/42
• Low Voltage Directive 73/23 (amended by 93/68)
• Electromagnetic Compatibility Directive 89/336 (amended by 93/68)
President and Legal Representative
Cav. del Lavoro
Dante Ferroli
BThis 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.
AThis symbols calls attention to a note or important notice.
cod. 3540M640 - 07/2008 (Rev. 00)
• Carefully read the warnings in this instruction book-
let since they provide important information on safe
installation, use and maintenance.
• This instruction booklet is an integral part of the
product and must be carefully kept by the user for fu-
ture reference.
• If the unit is sold or transferred to another owner or if
it is to be moved, always make sure that the booklet
accompanies the boiler so that it can be consulted
by the new owner and/or installer.
• Installation and maintenance must be carried out by
professionally qualified personnel, according to cur-
rent regulations and the manufacturer's instructions.
• Incorrect installation or poor maintenance can cause
damage or physical injury. The manufacturer de-
clines any responsibility for damage caused by er-
rors in installation and use or by failure to follow the
manufacturer's instructions.
• Before carrying out any cleaning or maintenance op-
eration, disconnect the unit from the electrical power
supply using the switch and/or the special cut-off de-
vices.
• In case the unit breaks down and/or functions poorly,
deactivate it, do not make any attempt to repair it or
directly intervene. Contact professionally qualified
personnel. Any repair/replacement of products must
only be carried out by qualified professional person-
nel using exclusively genuine parts. Failure to com-
ply with the above could affect the safety of the unit.
• Periodical maintenance carried out by qualified per-
sonnel is essential for guaranteeing good operation
of the unit.
• This unit must only be used for the purpose for which
it was designed. Any other use is considered im-
proper and therefore hazardous.
• After removing the packing, check the integrity of the
contents. Packing materials must not be left within
the reach of children as they are potentially hazard-
ous.
• In case of doubt do not use the unit, and contact the
supplier.
• The images shown in this manual are a simplified
representation of the product. In this representation
there may be slight, unimportant differences with the
supplied product.

ENERGY TOP W 70
3
3540M640 cod. 3540M640 - 07/2008 (Rev. 00)
1 Operating instructions ............................................................................................................ 4
1.1 Introduction.............................................................................................................................................4
1.2 Control panel ..........................................................................................................................................4
1.3 Turning on and off ..................................................................................................................................6
1.4 Adjustments............................................................................................................................................7
2 Installation.............................................................................................................................. 11
2.1 General Instructions .............................................................................................................................11
2.2 Place of installation ..............................................................................................................................11
2.3 Plumbing connections ..........................................................................................................................11
2.4 Gas connection ....................................................................................................................................14
2.5 Electrical connections...........................................................................................................................14
2.6 Fume ducts...........................................................................................................................................16
2.7 Condensate drain connection...............................................................................................................19
3 Service and maintenance...................................................................................................... 20
3.1 Adjustments..........................................................................................................................................20
3.2 Start-up.................................................................................................................................................21
3.3 Maintenance.........................................................................................................................................22
3.4 Troubleshooting....................................................................................................................................24
4 Technical data and characteristics ...................................................................................... 26
4.1 Dimensions and connections ...............................................................................................................26
4.2 General view and main components ....................................................................................................27
4.3 Plumbing circuit ...................................................................................................................................28
4.4 Technical data table .............................................................................................................................29
4.5 Diagrams ..............................................................................................................................................30
4.6 Wiring diagram .....................................................................................................................................31

ENERGY TOP W 70
4EN
cod. 3540M640 - 07/2008 (Rev. 00)
1. Operating instructions
1.1 Introduction
Dear Customer,
Thank you for choosing ENERGY TOP W 70, a wall-mounted boiler featuring FERROLIadvanced design, cutting-edge
technology, high reliability and quality construction. Please read this manual carefully since it provides important infor-
mation on safe installation, use and maintenance.
ENERGY TOP W 70 is a high efficiency, low emissions sealed chamber premix condensing heat generator for heat-
ing, running on natural gas or LPG and equipped with a microprocessor control system.
The boiler shell consists of an aluminium finned tube exchanger and a premix burner in steel, equipped with electronic
ignition and ionisation flame control, a modulating speed fan and a modulating gas valve. ENERGY TOP W 70 is a heat
generator arranged to operate alone or in cascade.
1.2 Control panel
fig. 1 - Control panel
Key
1 = DHW temperature setting decrease button (with
optional hot water tank installed)
2 = DHW temperature setting increase button (with
optional hot water tank installed)
3 = Heating system temperature setting decrease
button
4 = Heating system temperature setting increase
button
5 = Display
6 = Summer/Winter mode selection button
7 = Economy/Comfort mode selection (with optional
hot water tank installed) and unit On/Off button
8 = Reset button
9 = DHW operation (with optional hot water tank in-
stalled)
10 = Summer mode
11 = Multifunction
12 = Eco (Economy) mode (with optional hot water
tank installed)
13 = Heating mode
14 = Unit On / Off button
15 = Burner On
16 = Appears on connecting the Remote Timer Con-
trol (optional)
17 = Information symbol
18 = Arrow symbol
20 = Fault
21 = Circulating pump On
22 = Appears on connecting the external probe (op-
tional)
23 = Boiler Off
25 = Fault reset request
17 18 2320
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ENERGY TOP W 70
5EN cod. 3540M640 - 07/2008 (Rev. 00)
Indication during operation
Heating
A heating demand (generated by the Room Thermostat or Remote Timer Control or 0-10 Vdc signal) is indicated by
activation of the circulating pump and the radiator (details 13 and 21 - fig. 1).
The display (detail 11 - fig. 1) shows the actual heating delivery temperature and during DHW standby time, the mes-
sage “d”.
fig. 2
DHW circuit (with optional hot water tank installed)
A hot water tank heating demand is indicated by activation of the circulating pump and the tap (details 9 and 21 fig. 1).
The display (detail 11 - fig. 1) shows the actual hot water tank sensor temperature and during heating standby time, the
message “d“.
fig. 3 -
Exclude hot water tank (economy)
Hot water tank temperature maintaining/heating can be excluded by the user. If excluded, domestic hot water will not
be delivered. The hot water tank can be deactivated by the user (ECO mode) by pressing the button (detail 7 -
fig. 1). In ECO mode the display activates the symbol (detail 12 - fig. 1). To activate COMFORT mode, press the
button (detail 7 - fig. 1) again.
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ENERGY TOP W 70
6EN
cod. 3540M640 - 07/2008 (Rev. 00)
1.3 Turning on and off
Boiler lighting
Press the On/Off button (detail 14 fig. 1).
fig. 4 - Boiler lighting
• For the following 120 seconds the display will show FH which identifies the heating system air venting cycle.
• During the first 10 seconds the display will also show the card software release (A = Display card software release
/ B = Controller software release).
• Open the gas valve ahead of the boiler.
• When the message FH disappears, the boiler is ready to operate automatically in case of a room thermostat de-
mand.
Turning the boiler off
Press the button (detail 7 - fig. 1) for 5 seconds.
fig. 5 - Turning the boiler off
When the boiler is turned off, the electronic board is still powered.
Domestic hot water (with optional hot water tank installed) and heating operation are disabled. The antifreeze system
remains activated.
To relight the boiler, press the button (detail 7 fig. 1) again for 5 seconds.
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A
B
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ENERGY TOP W 70
7EN cod. 3540M640 - 07/2008 (Rev. 00)
fig. 6
The boiler will be immediately ready to operate whenever domestic hot water is drawn (with optional hot water tank in-
stalled) or in case of a room thermostat demand.
To completely disconnect the power to the unit, press the button detail 14 fig. 1.
BThe antifreeze system does not work when the power and/or gas to the unit are turned off. To avoid damage
caused by freezing during long idle periods in winter, it is advisable to drain all water from the boiler, DHW
circuit and system; or drain just the DHW circuit and add a suitable antifreeze to the heating system, complying
with that prescribed in sec. 2.3.
1.4 Adjustments
Summer/Winter changeover
Press the button detail 6 - fig. 1 for 1 second.
fig. 7
The display activates the Summer symbol detail 10 - fig. 1. The heating function is deactivated, whereas the possible
production of domestic hot water (with optional external hot water tank) remains activated. The antifreeze system re-
mains activated.
To deactivate Summer mode, press the button (detail 6 - fig. 1) again for 1 second.
Heating temperature adjustment
Operate the heating buttons (details 3 and 4 - fig. 1) to adjust the temperature from a min. of 20 °C to a
max. of 90 °C.
fig. 8
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ENERGY TOP W 70
8EN
cod. 3540M640 - 07/2008 (Rev. 00)
DHW temperature adjustment (with optional hot water tank installed)
Operate the DHW buttons (details 1 and 2 - fig. 1) to adjust the temperature from a min. of 10 °C to a max.
of 65°C.
fig. 9
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.
Sliding Temperature
When the optional external probe is installed the corresponding symbol (detail 22 - fig. 1) is activated on the control
panel display (detail 5 - fig. 1). The boiler control system operates with "Sliding Temperature”. In this mode, the temper-
ature of the heating system is adjusted according outside weather conditions, in order to ensure high comfort and en-
ergy saving throughout the year. In particular, as the outside temperature increases the system delivery temperature
decreases according to a given “compensation curve”.
With Sliding Temperature adjustment, the temperature set with the heating buttons (details 3 and 4 - fig. 1)
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. Possible adjustments can in any case be
made by the user to improve comfort.
Compensation curve and curve offset
Press the button (detail 8 - fig. 1) for 5 seconds, to display the actual compensation curve (fig. 10) which can
be modified with the DHW buttons (details 1 and 2 - fig. 1).
Adjust the required curve from 1 to 10 according to the characteristic (fig. 12).
By setting the curve to 0, sliding temperature adjustment is disabled.
fig. 10 - Compensation curve
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ENERGY TOP W 70
9EN cod. 3540M640 - 07/2008 (Rev. 00)
Press the heating buttons (details 3 and 4 - fig. 1) to access parallel curve offset (fig. 13), modifiable with
the DHW buttons (details 1 and 2 - fig. 1).
fig. 11 - Parallel curve offset
Press the button (detail 8 - fig. 1) again for 5 seconds to exit parallel curve adjustment mode.
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. 12 - Compensation curves
fig. 13 - Example of parallel compensation curve shift
AIf the Remote Timer Control (optional) is connected to the boiler, the above adjustments are managed accord-
ing to that given in table 1.
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20
30
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85
20 10 0 -10 -20
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OFFSET = 20 OFFSET = 40

ENERGY TOP W 70
10 EN
cod. 3540M640 - 07/2008 (Rev. 00)
Table. 1
Water system 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 F37 (fig. 14).
fig. 14 - System low pressure fault
AOnce the system pressure is restored, the boiler will activate the 120-second air venting cycle indicated on the
display by FH.
Heating temperature adjustment Adjustment can be made from the Remote Timer Control menu and the boiler
control panel.
DHW temperature adjustment (with optional hot
water tank installed)
Adjustment can be made from the Remote Timer Control menu and the boiler
control panel.
Summer/Winter changeover 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 selects
the Economy mode. In this condition, the button (detail 7 - fig. 1) on
the boiler panel is disabled.
On enabling DHW from the Remote Timer Control menu, the boiler selects
the Comfort mode. In this condition it is possible select one of the two modes
with the button (detail 7 - fig. 1).
Sliding Temperature Both the Remote Timer Control and the boiler card manage Sliding Tempera-
ture adjustment: of the two, the Sliding Temperature of the boiler card has pri-
ority.
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ENERGY TOP W 70
11EN cod. 3540M640 - 07/2008 (Rev. 00)
2. Installation
2.1 General Instructions
THE BOILER MUST ONLY BE INSTALLED BY QUALIFIED PERSONNEL, IN COMPLIANCE WITH ALL THE IN-
STRUCTIONS GIVEN IN THIS TECHNICAL MANUAL, THE PROVISIONS OF CURRENT LAW, THE NATIONAL AND
LOCAL REGULATIONS, AND THE RULES OF PROPER WORKMANSHIP.
ENERGY TOP W 70 is a high-efficiency heat generator arranged to operate alone or in cascade (bank). When two or
more generators ENERGY TOP W 70 are installed in cascade with the original kits FERROLI, respecting the prescrip-
tions of this manual, they can be considered as a single heat generator of total power equal to the sum of the powers
of all the units connected in cascade.
All the requirements of the current standards and regulations applicable to this “equivalent” generator with total heating
capacity must be met. In particular the place of installation, safety devices and fume exhaust system must be adequate
for the total heating capacity of the bank of units.
In fact, each ENERGY TOP W 70 is a complete and independent heat generator, equipped with its own safety devices.
In case of overtemperature, a lack of water or no circulation in the unit, the protection devices cause the unit to switch
off or shut down, preventing it from working.
The installation instructions given in the following paragraphs concern both single units and connection in cascade.
2.2 Place of installation
The combustion circuit is sealed with respect to the place of installation and therefore the unit can be installed in any
room. However, the place of installation must be sufficiently ventilated to prevent the creation of any dangerous condi-
tions in case of even small gas leaks. This safety precaution is required by EEC Directive no. 90/396 for all gas-fired
units, including those with a so-called sealed chamber.
The unit can also work with air drawn from the installation room (B type). In this case, the room must be provided with
adequate ventilation, according to current regulations.
Therefore the place of installation must be free of dust, flammable materials or objects or corrosive gases. The room
must be dry and not subject to freezing.
The boiler is arranged for wall installation. Wall fixing must ensure a stable and effective support for the generator.
AIf the unit is enclosed in a cabinet or mounted alongside, a space must be provided for removing the casing
and for normal maintenance operations
2.3 Plumbing connections
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 proper and regular operation. In par-
ticular, provide for all the protection and safety devices required by current regulations for the complete modular gener-
ator. They must be installed on the hot water circuit delivery piping, immediately downstream of the last module, within
a distance of 0.5 m, 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.
BThe safety valve outlet must be connected to a funnel or collection pipe to prevent water spurting onto the floor
in case of overpressure in the heating circuit. Otherwise, if the discharge valve cuts in and floods the room,
the boiler manufacturer cannot be held liable.
Do not use the water system pipes to earth electrical appliances.
Before installation, carefully wash all the pipes of the system to remove any residuals or impurities that could affect prop-
er operation of the unit.
BA filter must be also installed on the system return piping to prevent impurities or sludge from the system clog-
ging and damaging the heat generators.
The filter MUST be installed when replacing generators in existing systems. The manufacturer 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 given on the unit.

ENERGY TOP W 70
12 EN
cod. 3540M640 - 07/2008 (Rev. 00)
System water charcteristics
In the presence of water harder than 25° Fr (1°F = 10ppm CaCO3), the use of suitably treated water is advisable in order
to avoid possible scaling in the boiler. The treatment must not in any case reduce the hardness to values below 15°F
(Decree 236/88 for uses of water intended for human consumption). Water treatment is indispensable in the case of
very large systems or with frequent replenishing of water in the system. If partial or total emptying of the system be-
comes necessary in these cases, it is advisable to refill it with treated water.
Antifreeze system, antifreeze fluids, additives and inhibitors
The boiler is equipped with an antifreeze system that turns on the boiler in heating mode when the system delivery water
temperature falls under 6°C. The device will not come on if the electricity and/or gas supply to the unit are cut off. If it
becomes necessary, it is permissible to use antifreeze fluid, additives and inhibitors only if the manufacturer of these
fluids or additives guarantees they are suitable for this use and cause no damage to the heat exchanger or other com-
ponents and/or materials of the boiler unit and system. It is prohibited to use generic antifreeze fluid, additives or inhib-
itors that are not expressly suited for use in heating systems and compatible with the materials of the boiler unit and
system.

ENERGY TOP W 70
13EN cod. 3540M640 - 07/2008 (Rev. 00)
Optional kits
The following kits are available on request:
fig. 15 - Optional Kits
1) code 042021X0- High head PUMP KIT
fig. 16 - Pump head
2) code 042023X0- 3-way COCK KIT - Male 1"1/2 with non-return valve and safety valve
It enables shutting off (for maintenance operations) in conformity with ISPESL requirements and can
be used as a local shutoff for the connection of several units in bank. The third way must be connected
to an atmospheric discharge manifold. In this way, with the valve in the "open" position, the boiler ex-
changer is connected to the delivery manifold; and in the "closed" position, through the third way, the
exchanger communicates with the atmospheric discharge manifold. This valve therefore also acts as
a boiler discharge.
3) code 042022X0- COCK KIT Male/Female 1"1/2
In combination with the 3-way valve described above, it enables shutting off (for maintenance opera-
tions) in conformity with ISPESL requirements and can be used as a local shutoff for the connection of
several units in bank.
1
3
2
01234567
0
1
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7
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9
H [m]
Q [m3/h]

ENERGY TOP W 70
14 EN
cod. 3540M640 - 07/2008 (Rev. 00)
2.4 Gas connection
BBefore making the connection, ensure that the unit is arranged for operation with the type of fuel available and
carefully clean all the gas system pipes to remove any residuals that could affect boiler operation.
The gas must be connected to the relevant connection (see cap. 2.3 "Plumbing connections") in conformity with current
standards, with a rigid metal pipe or with a continuous flexible s/steel tube, installing a gas cock between the system
and boiler Make sure all the gas connections are tight. The gas meter capacity must be suitable for the simultaneous
use of all the units connected to it. The diameter of the gas pipe leaving the boiler does not determine the diameter of
the pipe between the unit and the meter; it must be chosen according to its length and loss of pressure, in conformity
with current standards.
BDo not use the gas pipes to earth electrical appliances.
In case of connection in cascade, make sure to install a fuel shutoff valve externally with respect to the mod-
ules.
2.5 Electrical connections
Connection to the electrical grid
BThe unit's electrical safety is only guaranteed when correctly connected to an efficient earthing system exe-
cuted according to current safety standards. Have the efficiency and suitability of the earthing system checked
by professionally qualified personnel. The manufacturer is not responsible for any damage caused by failure
to earth the system. Also make sure that the electrical system is adequate for the maximum power absorbed
by the unit, as specified on the boiler dataplate.
The boiler is prewired and provided with a Y-cable and plug for connection to the electricity line. The connections to the
grid must be made with a permanent connection and equipped with a bipolar switch whose contacts have a minimum
opening of at least 3 mm, interposing fuses of max. 3A between the boiler and the line. It is important to respect the
polarities (LINE: brown wire / NEUTRAL: blue wire / EARTH: yellow-green wire) in making connections to the electrical
line. During installation or when changing the power cable, the earth wire must be left 2 cm longer than the others.
BThe user must never change the unit's power cable. If the cable gets damaged, switch off the unit and have it
changed solely by professionally qualified personnel. If changing the electric power cable, use solely “HAR
H05 VV-F” 3x0.75 mm2 cable with a maximum outside diameter of 8 mm.
Room thermostat (optional)
BCAUTION: The room thermostat must have clean contacts. CONNECTING 230 V. TO THE TERMINALS OF
THE ROOM THERMOSTAT WILL IRREPARABLY DAMAGE THE ELECTRONIC CARD.
When connecting a remote timer control or a timer switch, do not take the power supply for these devices from
their cut-out contacts. Their power supply must be taken with a direct connection from the mains or with bat-
teries, depending on the kind of device.

ENERGY TOP W 70
15EN cod. 3540M640 - 07/2008 (Rev. 00)
External probe (optional)
Connect the probe to its respective terminals. The maximum permissible length for the boiler - external probe connec-
tion electrical cable is 50 m. A normal 2-wire cable can be used. The external probe should preferably be installed on
the North, North-West wall or that facing the largest area of living room. The probe must never be exposed to the early
morning sun or, insofar as possible, direct sunlight; protect it if necessary. In any case, the probe must not be installed
near windows, doors, ventilation openings, flues or heat sources that could affect the reading.
fig. 17 - External probe positioning not recommended
Accessing the electrical terminal block
To access the terminal block (A- fig. 18) it is necessary to remove the front panel (see fig. 26), remove the fixing screw
Band turn the control panel as indicated in fig. 18. The layout of the terminals for the various connections is also given
in the wiring diagram in fig. 32.
fig. 18 - Accessing the terminal block

ENERGY TOP W 70
16 EN
cod. 3540M640 - 07/2008 (Rev. 00)
2.6 Fume ducts
The unit is a “C type” with sealed chamber and forced draught; the air inlet and fume outlet must be connected to one
of the extraction/inlet systems indicated below. The unit is approved to work with all the Cxy and Bxy flue configurations
given on the dataplate (some configurations are given by way of example in this section). Some configurations, howev-
er, may be expressly limited or not permitted by local regulations, standards or laws. Before proceeding with installation,
check and carefully observe the relevant prescriptions. Also comply with the provisions concerning the positioning of
wall and/or roof terminals and the minimum distances from windows, walls, ventilation openings, etc.
BThis C-type unit must be installed using the inlet and fume exhaust ducts supplied by the manufacturer in con-
formity with UNI-CIG 7129/92. Failure to use them automatically invalidates every warranty and relieves the
manufacturer of any liability.
AFor fume ducts longer than 1 m, during installation take in account the natural expansion of the materials when
the boiler is operating.
To prevent deformations, leave an expansion space of approx. 2 ÷ 4 mm for every metre of pipe.
fig. 19 - Expansion
2 ÷ 4 mm

ENERGY TOP W 70
17EN cod. 3540M640 - 07/2008 (Rev. 00)
Connection with coaxial pipes
fig. 20 - Examples of connection with coaxial pipes ( = Air / = Fumes)
For coaxial connection, fit the unit with one of the following starting accessories. For the wall hole dimensions, refer to
sec. 4.1. Any horizontal sections of the fume exhaust must be kept sloping slightly towards the boiler, to prevent pos-
sible condensate from flowing back towards the outside and causing dripping.
fig. 21 - Starting accessories for coaxial ducts 041007X0
Before proceeding with installation, check with table 2 that the maximum permissible length is not exceeded, bearing in
mind that every coaxial bend gives rise to the reduction indicated in the table. For example, a Ø 80/125 duct comprising
a 90° bend + 1 horizontal metre has a total equivalent length of 1.5 metres.
Table. 2 - Max. length coaxial ducts
ENERGY TOP W 70
Coaxial 80/125
Max. permissible length 4 m
Reduction factor 90° bend 0.5 m
Reduction factor 45° bend 0.25 m
C
13
C
13
C
33
C
33
C
33
C
13
225
167
120
125
80 80
81

ENERGY TOP W 70
18 EN
cod. 3540M640 - 07/2008 (Rev. 00)
Connection with separate pipes
fig. 22 - Examples of connection with separate pipes ( = Air / = Fumes)
Separate Ø80 ducts can be connected directly to the unit.
Before proceeding with installation make sure the maximum permissible length has not been exceeded, by means of a
simple calculation:
1. Completely establish the layout of the system of split flues, including accessories and outlet terminals.
2. Consult the table 4 and identify the losses in meq (equivalent metres) of every component, according to the instal-
lation position.
3. Check that the sum total of losses is less than or equal to the maximum permissible length in table 3.
Table. 3 - Max. length separate ducts
Table. 4 - Accessories
Separate ducts
ENERGY TOP W 70
Max. permissible length 20 meq
Losses in meq
Air
inlet
Fume exhaust
Vertical Horizontal
Ø 80 PIPE 1 m M/F 1KWMA83W 1.0 1.6 2.0
BEND 45° M/F 1KWMA65W 1.2 1.8
90° M/F 1KWMA01W 1.5 2.0
PIPE SECTION with test point 1KWMA70W 0.3 0.3
TERMINAL air, wall 1KWMA85A 2.0 -
fumes, wall with antiwind 1KWMA86A - 5.0
FLUE Split air/fumes 80/80 1KWMA84U - 12.0
C 53
C
33
C
53
B 23 C 13

ENERGY TOP W 70
19EN cod. 3540M640 - 07/2008 (Rev. 00)
2.7 Condensate drain connection
The boiler is equipped with a trap to drain condensate. Carry out the following instructions for fitting.
1. Fix the support bracket “A” to the bottom of the boiler.
2. Connect the preformed black tube “B” to the condensate drain “S” on the bottom of the boiler, fixing it with a clamp.
3. Remove the trap ring nut “C” and insert the preformed black tube “B” in the special opening, making sure to fit the
seal “D”.
4. Refit the trap ring nut, insert it in the bracket and fix with the special clip “E”.
5. Connect the flexible tube "F" from the trap to the condensate drain system.
fig. 23 - Condensate drain connection

ENERGY TOP W 70
20 EN
cod. 3540M640 - 07/2008 (Rev. 00)
3. Service and maintenance
All adjustment, conversion, startup and maintenance operations described below must only be carried out by Qualified Per-
sonnel (meeting the professional technical requirements prescribed by current regulations) such as those of the Local After-
Sales Technical Service.
FERROLI declines any liability for damage and/or injury caused by unqualified and unauthorised people tampering with the
unit.
3.1 Adjustments
Gas conversion
The unit can operate on Natural Gas or LPG and is factory-set for use with one of these two gases, as clearly shown
on the packing and on the dataplate. Whenever a different gas to that for which the unit is arranged has to be used, a
conversion kit will be required, proceeding as follows:
1. Remove the casing.
2. Loosen the gas valve fixing ring “A".
3. Undo the three fixing screws “B” and remove the gas valve “C“.
4. Replace the gas valve “D”, positioning it inside the gasket “E”, with that contained in the conversion kit. Refit the
parts and check the tightness.
5. Modify the parameter for the type of gas:
• put the boiler on standby
• press the DHW buttons (details 1 and 2 - fig. 1) at the same time for 10 seconds: the display shows “P01“ flash-
ing.
• press the DHW buttons (details 1 and 2 - fig. 1) at the same time to set the parameter 00 (for natural gas) or 01
(for LPG).
• press the DHW buttons (details 1 and 2 - fig. 1) at the same time for 10 seconds.
• the boiler will go back on standby
6. Apply the label, contained in the conversion kit, near the dataplate.
7. Using a combustion analyser connected to the boiler fume outlet, make sure the CO2content in the fumes, with the
boiler operating at max. and min. output, matches that given in the technical data table for the corresponding type
of gas.
fig. 24 - Gas conversion
C
D
A
B