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EN
ZEFIRO
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Thank you for purchasing this product.
The FERROLI instantaneous gas water heater you have chosen was designed and manufactured by our specialists
and controlled in every stage according to the strictest quality standards, to meet your needs.
To ensure best use of your new FERROLI instantaneous gas water heater, please read these instructions carefully.
CONTENTS
DESCRIPTION, EQUIPMENT LEVELS.................................................................................................. 3
USER INSTRUCTIONS .............................................................................................................. ................5
ELECTRONIC WATER HEATER ...................................................................................................................... 5
CONTROL PANEL.................................................................................................................. .................... 6
INSTALLER INSTRUCTIONS......................................................................................................... .........6
PLACE OF INSTALLATION...............................................................................................................................6
GAS AND WATER CONNECTIONS .................................................................................................................6
WALL MOUNTING............................................................................................................................................. 7
MAIN DIMENSIONS ..........................................................................................................................................7
FLUE GAS EXHAUST .......................................................................................................................................8
EXTERNAL CASING ASSEMBLY..................................................................................................................... 8
CHECK AND DELIVERY ................................................................................................................................... 8
FUME EXHAUST SAFETY DEVICE ................................................................................................................ 8
TECHNICAL DATA ............................................................................................................................................ 9
SERVICE AND MAINTENANCE........................................................................................................ ....10
CONVERSION..................................................................................................................... ...................... 10
WIRING DIAGRAM ................................................................................................................. ................11
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EN
ZEFIRO
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'(6&5,37,21(48,30(17/(9(/6
The FERROLI water heater has been designed and built to offer the convenience (with correct use) of hot water. The
unit consists of the following elements (see attached table).
1. Incorporated draught diverter: Ensures correct combustion, even when the draught changes
in the flue.
2. Heat exchanger: In pure electrolytic copper with thermal covering that ensures
maximum transmission of heat to the water.
3. Multigas burner: high technology that fully exploits the gas consumed. Conversion
to another type of gas is possible by changing the nozzles and regulator pin.
5. Ignition safety valve: Equipped with an electric system allowing the
gas to come out the burners only in safe conditions - presence of flame.
6. Power adjustment knob: for manually setting the required power.
7. Temperature selector: for setting the required hot water temperature.
9. Hydraulic device: Automatically activates the water heating mechanisms
when a hot water tap is opened. It is also a SAFETY
SYSTEM, since it opens the gas flow to the burner only when water is circulating in the
exchanger.
14. Electronic ionisation probe: For detecting the presence of flame
15. Burner ignition electrode
16. Temperature limiting thermostat.
17. Ignition microswitch.
18. Flue gas control device. Turns the water heater off in case of insufficient draught or the
presence of obstructions in the fume exhaust.
19. Battery box.
20. Hydraulic drain valve.
21. Electronic control module.
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ZEFIRO
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B D C L A4 M
Zefiro C11 560 550 170 328 Ψ 110 170
Zefiro C14 660 650 220 400 Ψ 130 220
1 = Hot water outlet: R 1/2".
2 = Gas inlet: R 1/2".
3 = Cold water inlet: R 1/2".
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ZEFIRO
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86(5,16758&7,216
ELECTRONIC WATER HEATER
-Preliminary checks
1. Make sure the hot water taps are closed.
2. Open the water heater gas cock, located on the gas connection to the unit.
3. Make sure the 1.5 V batteries are in place, with the correct polarity (+ and -), and that the safety seal has
been removed.
4. Also, make sure the batteries are sufficiently charged for water heater operation.
-Manual setting of burner power
With the power adjustment knob it is possible to select the water heater power, minimum (-) or maximum (+), and
intermediate positions according to the required water heating level; by turning the knob to +, the unit heats the water
at max. power. If the temperature is too high, for example in summer, or when a reduced delivery of not very hot
water is required, turn the knob to -, thereby almost halving the power (and gas consumption). In the position z the
unit is deactivated.
-Temperature setting
The water temperature can be easily set with the temperature selector: turn it to the right to increase the
temperature, or left to decrease the temperature.
-Hot water delivery
− After making the above adjustments, the water heater is ready to operate in a completely automatic way. On
opening a hot water tap an intermittent discharge is generated on the ignition electrode, causing the burner to
light.
− All the electronic models have an ionisation probe inserted in the burner for controlling correct flame presence.
In case of no gas or anomalies with the burner going out, the control system attempts automatic relighting. The
water heater stops if the flame does not light after a few seconds.
− Therefore it is necessary to eliminate the cause or the element preventing the gas from reaching the water
heater, e.g. inadvertent closing of the gas cock, gas bottle finished, etc.
− The water heater shutdown is deactivated by opening or closing the hot water tap.
− Repeat the operation if hot water delivery is not restored after eliminating the cause and opening the hot water
tap. If the fault persists, contact the After-Sales Technical Service.
− The presence of flame in the burner can be seen in the special window.
-Water heater shutdown
The burner goes out automatically when the domestic hot water demand ceases.
No particular steps are necessary to carry out another lighting stage.
To completely shut down the unit, turn the knob to z .
In case of prolonged shutdown, close the gas cock ahead of the unit.
PREVENTIVE MEASURES
-Against scaling
In places with hard water, scaling builds up on the walls of the recipient containing it, making the transmission of heat
more difficult. To save energy and prolong the service life of the unit, it is advisable to set the water temperature like
that of use, selecting it with the selector knob.
-Against freezing
If the water heater is installed in a cold place, the water could freeze inside and damage it. To prevent this, in case of
imminent frost (e.g. at night):
1. Close the water cock at the water heater inlet.
2. Open a hot water tap located at a lower level (e.g. bidet).
3. Release the water heater drain valve, so that air can enter the unit and water can come out. The drain valve is
located at the bottom of the water heater. It is easily accessed without removing the casing.
-Safeguarding the environment
Used batteries must be placed in the appropriate containers.
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ZEFIRO
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&21752/3$1(/
,167$//(5,16758&7,216
Correct operation of the water heater depends largely on CORRECT installation. INSTALLATION MUST ONLY BE
CARRIED OUT BY QUALIFIED PERSONNEL, IN ACCORDANCE WITH ALL THE INSTRUCTIONS GIVEN IN THIS
TECHNICAL MANUAL, THE PROVISIONS OF THE CURRENT LAWS, THE NATIONAL AND LOCAL
REGULATIONS AND THE RULES OF PROPER WORKMANSHIP.
1. PLACE OF INSTALLATION
1.1 Make sure the water heater chosen is the most suitable:
− To adequately meet the system's hot water requirements.
− For the gas to be used (see water heater dataplate).
− For the water supply pressure, necessary for operation (see table of characteristics).
1.2 Make sure the room where the unit is installed meets all the requirements of the Current Regulations.
In particular, this unit is an "open chamber" type and must only be installed and operate in permanently
ventilated places. An insufficient supply of combustion air will compromise normal operation and the
evacuation of fumes. Also, the fumes forming under these conditions are extremely harmful to health if
dispersed in the domestic environment. Therefore the place of installation must be free of dust,
flammable materials or objects or corrosive gases.
1.3 Position the water heater as close as possible to the hot water taps, near the sink, but NEVER above a
cooktop. It must also be situated as close as possible to the flue or the start of the flue gas exhaust pipe.
2. GAS AND WATER CONNECTIONS
2.1 The hot water pipes must be as short as possible. Insulate long sections to prevent heat loss.
2.2 Carry out the relevant connections according to the image below and the symbols on the unit: cold water
(F), hot water (C). Avoid constrictions and unnecessary bends. It is advisable to use pipes of at least 1/2"
diameter; 3/4" in case of low water pressure.
Avoid the creation of air pockets in the hot water piping. Bleed the water pipes.
2.3 When connecting the gas to the water heater, install a cock suitable for the gas delivery.
The diameter of the gas connection pipes must be:
-Pipe ψ 15 mm external, for modes ZEFIRO
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3. WALL MOUNTING
3.1 Fix the plugs and hooks on the wall, in a central position vertical to the appliance, as shown in the figure
below.
3.2 Mark the position of the bottom screws
3.3 Hang the water heater on the plugs+hooks and tighten the screws for fixing the unit to the wall.
3.4 Connect the hot and cold water flexible tubes, remembering to check their tightness. To avoid circulation
problems, do not remove the cold water inlet filter.
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4. FLUE GAS EXHAUST.
4.1 The size of the flue gas exhaust pipe must be Ψ 110 mm (Zefiro C11), Ψ 130 mm (Zefiro C14).
4.2 The mass flows for calculating the flue are given in the technical data table on page 9.
4.3 Flue gas exhaust check: with the water heater operating at nominal power, using a cold mirror or any
other approved measuring device, check the tightness of the entire flue gas exhaust system.
4.4 Maintenance.
Yearly servicing is advisable. It must be carried out by the official After-Sales Technical Service.
5. EXTERNAL CASING ASSEMBLY.
If, for some reason, or for installation, the casing has to be removed:
5.1 Remove the gas and temperature selector knobs by pulling them off.
5.2 Undo the screws fixing the casing.
5.3 Fit the knobs by pressing them on.
6. CHECK AND COMMISSIONING.
6.1 Make sure installation complies with ALL THE CURRENT PROVISIONS OF THE LAW, AND THE
NATIONAL AND LOCAL REGULATIONS.
6.2 Check the TIGHTNESS of the WATER and GAS circuits
6.3 Start the water heater, following the instructions for each model and CHECK ITS CORRECT
OPERATION, leaving it on for 15 minutes.
6.4 For correct fitting of the temperature selector knob, make the pointer match the last curved section on the
right of the pictogram.
6.5 Instruct the user on how to correctly use the water heater and give him this instruction handbook.
7. FUME EXHAUST SAFETY DEVICE (fume thermostat)
7.1 The water heater's safety device ensures the correct exhaust of flue gases; therefore do not deactivate it
or carry out any operation on it.
7.2 If the safety device cuts in when the water heater is started, check the flue gas outlet, checking the
exhaust with a cold mirror or with any suitable and approved measuring device.
7.3 In case of a fault, only use original replacements, otherwise the safety device may not work properly.
7.4 Fume thermostat replacement must be carried out by qualified technicians, proceeding as follows:
-Remove the faulty fume thermostat by undoing the 2 fixing screws.
-Install a new original thermostat.
-Fix the fume thermostat in its place without overtightening the screws.
-Check its correct operation.
NB:
Remember to make an air inlet opening in the room where the water heater is installed (as required by the current
regulations).
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TECHNICAL DATA
Model
ZEFIRO-11 ZEFIRO-14
Gas Category II2H3+ II2H3+
Type of unit B11BS B11BS
Type of installation Internal Internal
Max heat input kW 21,1 26,8
Min heat input kW 8,1 10,7
Max heat output kW 18,9 23,8
Min heat output kW 7,0 9,3
Pmax efficiency % 89,0 88,8
Burner injectors G20 n° x Ψ 10 x 1,15 16 x 1.02
Gas inlet pressure G20 Mbar 20,0 20,0
Max gas flow rate G20
mϹŚ
2,23 2,83
Min gas flow rate G20
mϹŚ
0,86 1,13
Burner injectors G31 n° x Ψ 10 x 0,72 16 x 0.66
Gas inlet pressure G31 Mbar 37,0 37,0
Max gas flow rate G31 Kg/h 1,65 2,09
Min gas flow rate G31 Kg/h 0,63 0,84
Max working pressure bar 10 10
Min working pressure ǻ t 25°C bar 0,4 0,4
Min working pressure ǻ t 50°C bar 0,2 0,2
DHW flow rate ǻ t 25°C l/min 10,8 13,7
DHW flow rate ǻ t 50°C l/min 5,4 6,8
Power supply voltage V/Hz 3 3
Weight empty Kg 9 13,0
CE Certification 0461BT0927 0461BT0927
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6(59,&($1'0$,17(1$1&(
Use a cloth and soapy water to clean the external casing. Do not use abrasive detergents or solvents. The high
quality of the materials used and the strict controls undergone by the units during production ensure a long service
life of the water heater, for the complete satisfaction of the user. To prolong the service life of the water heater, it is
advisable to check and clean it once a year. This type of activity must be carried out by the After-Sales Technical
Service.
CONVERSION TO ANOTHER TYPE OF GAS
All the conversion operations described below must only be carried out by Qualified Personnel (meeting the
professional technical requirements prescribed by the current regulations) such as those of the Local After-Sales
Technical Service.
FERROLI declines any liability for damage or injury caused by unqualified and unauthorised people tampering with
the unit.
NB : The water heater is arranged for a specific gas type, as indicated on the dataplate. If modification is
required, it is necessary to obtain the special conversion kit available from the After-Sales Technical Service,
proceeding as follows:
1. Close the gas and water supplies, remove the knobs and the casing.
2. Replace the burner nozzles (1) with those contained in the kit and indicated in the table.
3. Replace the power regulator pin (2) with that contained in the conversion kit, making sure to position it
correctly.
4. As proof of the conversion, apply (near the dataplate) the sticker contained in the conversion kit.
MODELS
NOZZLE DIAMETERS
LPG Natural Gas
ZEFIRO-11
0,72 1,15
ZEFIRO-14
0,66 1,02
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ZEFIRO
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WIRING DIAGRAM
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FERROLI S.p.A.
Via Ritonda 78/a
37047 San Bonifacio - Verona - ITALY
www.ferroli.it
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