Airfel ECOFEL KB1-24CE User manual

ADVANCED CLIMATE TECHNOLOGIES
ECOFEL/KB1-24CE
BOILER SRVICE MANUAL
PUBLICATION NO: K05-08
Revision Date: 29.02.2008, No: 0

ECOFEL BOILER SERVICE MANUAL
- 1 - Revision Date: 29 February 2008, Rev. No: 0
Contents
Ecofel KB1-24C
Contents ........................................................................................................................................................1
1. Product Identification ....................................................................................................................................2
2. Advantages ..................................................................................................................................................3
3. Technical Specifications ................................................................................................................................4
4. Safety Measures............................................................................................................................................5
5. Detailed view diagram .................................................................................................................................. 6
5.1 Piping Circuit Diagram ..................................................................................................................................6
6. Functional Components ................................................................................................................................7
6.1 Fan ................................................................................................................................................................7
6.2 Air Pressure Switch ......................................................................................................................................7
6.3 Burner............................................................................................................................................................7
6.4 Circulation Pump ..........................................................................................................................................7
6.5 Gas Valve ......................................................................................................................................................8
6.6 Expansion Tank ............................................................................................................................................8
6.7 Main Heat Exchanger....................................................................................................................................8
6.8 Hydraulic Block ............................................................................................................................................9
6.9 Automatic Bypass ........................................................................................................................................9
6.10 Ignition and Ionization Electrode ..................................................................................................................9
6.11 Limit Thermostat..........................................................................................................................................10
6.12 NTC Sensor ..............................................................................................................................................10
6.13 Flow Control Switch ....................................................................................................................................10
6.14 Filler Valve ..................................................................................................................................................10
6.15 Flow Limiter ................................................................................................................................................11
6.16 Combustion Chamber..................................................................................................................................11
6.17 Main Card ....................................................................................................................................................11
6.18 Water Pressure Pressure Switch ................................................................................................................11
6.19 Safety Valve ................................................................................................................................................12
6.20 Thermo-manometer ....................................................................................................................................12
7. Operation in Heater Mode ..........................................................................................................................13
8. Operation in Usage Water Mode ................................................................................................................13
9. Control Panel ..............................................................................................................................................15
9.1 Product Label .............................................................................................................................................16
10. Installation Instructions ..............................................................................................................................16
10.1 Installation Location and Conditions ..........................................................................................................13
10.2 Installation ..................................................................................................................................................17
10.3 Flue Kit Installation ......................................................................................................................................17
10.4 Homocentric Flue Kit Application ................................................................................................................18
10.5 Installation of Hydraulic Systems ................................................................................................................18
10.6 Natural Gas – LPG Conversion ..................................................................................................................19
10.7 Gas Pressure and Capacity Table ..............................................................................................................19
10.8 Gas Valve Measurement Points ..................................................................................................................20
10.9 Gas Valve Adjustments................................................................................................................................20
11.1 Electrical Connections................................................................................................................................21
11.2 Terminal Connections..................................................................................................................................21
11.3 Electrical Measurements ............................................................................................................................22
12. Main Card View ..........................................................................................................................................22
12.1 Programming of Parameters ......................................................................................................................23
12.2 Switching to Test Mode................................................................................................................................24
13. Failure Codes and Solution Techniques ....................................................................................................25
13.1 Failure Solution Techniques ..................................................................................................................26-27
14. Accessories ................................................................................................................................................27
14.1 Homocentric Flue Kit (C 12 60/100) ............................................................................................................27
14.2 System connection pipes; ..........................................................................................................................27
15 SPARE PARTS EXPLODED VIEW........................................................................................................28-34

ECOFEL KB1-24C(E)
ECOFEL KB1-24C(E)
ECOFEL BOILER SERVICE MANUAL
1. Product Identification:
ECOFEL Code Expansion
ECOFEL Code Expansion
- 2 - Revision Date: 29 February 2008, Rev. No: 0
Name of the wall type
appliance
Conventional boiler
Heat exchanger type
Version
Capacity 24 kW
Exhaust gas type
Integrated hot usage
water

403 mm
730 mm
345 mm
ECOFEL BOILER SERVICE MANUAL
2. Advantages:
Contemporary Design
24.3 Kw / 20,124 kcal/h Hermetic
93.1 % net output
Electronic ignition
Natural gas and LPG operation
High combustion efficiency with stainless steel burner
Directive 89/42/CE compliant 3 star combustion performance
Main Heat Exchanger made of copper
Heater and usage water adjustment with ±1ºC accuracy
Quick hot water production even at low mains water pressures
(0.5 bars)
Silent and long life pump
Automatic failure diagnosis system
Ease of installation (20 mm side space)
Access to all parts from face plate
Room thermostat or Timer installation (optional)
IP x 4D electrical protection
2 phase frost safety system
1. In heater mode, after the thermostat is closed, the circulation pump circulates the water in the system for 3 minutes. In
this way, accumulation of water in the heat exchanger is prevented.
2. Meets heating up to 150 m2and hot water demands.
3. For heating and hot usage water, it has full flame modulation reducing the flame length and providing fuel economy.
4. Provides easy diagnosis by the user and service through 9 different failure codes delivered by the LED light
system on the control panel.
5. Airfel boilers provide easy transportation and installation, thanks to their contemporary design (lower connection
kit, suspension bracket and mounting template is supplied with the appliance).
6. Conversion from NG to LPG and vice versa by replacing only the burner injectors is inexpensive and easy.
7. Flue kit connection is easily performed with the hermetic flue kit supplied as standard. Also, by adding original
extension parts, hermetic flue kit can be horizontally extended up to 3 m after the first elbow.
8. Two phase frost safety system.
9. As optional equipment, room thermostat can be connected.
10. TSE Certificated, efficient and widespread service within 24 hours is guaranteed.
11. For Airfel Ecofel and Weili Ecofel models, 3 years free, total 10 years original spare parts and service guarantee.
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ECOFEL BOILER SERVICE MANUAL
3. Specifications:
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KB1-24 CE
Gas Type Natural gas - LPG
General Specifications UNITS VALUES
Max. / Min. Heating Capacity KW 24,3 - 8,00
Max. Usage Water Capacity KW 24,3
Electrical Power Watts 110
Supply Voltage Volts 220
Electrical Protection Class IP X4D
Combustion Efficiency / Thermal Efficiency (80-60ºC) % 93,01 / 92,1
Max. / Min. Gas Consumption (Natural gas G-20) m3/h 2,6 / 1,0
Circulation Pump Total Head (3 Level) mss 5
Usage Specifications
Natural gas Operational Pressure (G 20) mbar 20
LPG Operational Pressure mbar 28
Number of Injectors pieces 12
Injector Diameter Natural gas (G 20) mm. 1,35
Injector Diameter LPG (G 31) mm. 0,77
Heater Circuit
System Operational Pressure Bars 1,5
Min. / Max. Operational Pressure Bars 0,5 - 3
Max. / Min. Water Temperature °C 82-35
Expansion Tank Capacity l 7
Expansion Tank Pre-Pressure Bars 1
Usage Water Circuit
Operational Pressure (Max. / Min. ) Bars 10 - 0,5
Min. Operational Flow l/min 2,7
Max. / Min. Water Temperature °C 55-35
Dimensions
Dimensions (H x W x D) mm. 730 x 403 x 345
Net Weight Kg. 34
Gross Weight Kg. 38
Emission Values
Flue Kit Gas Temperature (60/80) 1m °C 136,3
CO2 Amount % 6,7
CO Amount ppm 36,9
NO x ppm class 38 / 4th class
Piping Connections
Heater Circuit Stream-Return Diameter ¾
Usage Water Circuit Inlet-Outlet Diameter ½
Gas Inlet Diameter ¾
Flue Kit Connection
Pipe Diameter Homocentric mm. 60 /100
Max. Flue Kit Length m 3
90º Elbow Loss m 1
45º Elbow Loss m 0,5

ECOFEL BOILER SERVICE MANUAL
4. Safety Measures:
4.1 Flue Kit Safety System:
It is controlled by the differential pressure switch (pressure switch).
4.2 Pump Anti-blockage system:
In case the boiler is not operated for a long time, to prevent jamming of the circulation pump it is activated every 24
hours for 30 seconds. For this function to operate, the incoming power must be on even if the boiler is turned off.
4.3 Overheating safety system:
It is controlled by the limit thermostat. Limit thermostat shuts down the boiler when water temperature at main heat
exchanger outlet reaches 105ºC (±4ºC). When the water temperature cools down to 80ºC ± 12ºC, boiler should be
reset for restarting.
4.4 Waterless Operation Safety System:
It is a safety system preventing waterless operation of the boiler when the closed circuit water pressure on the
hydraulic block falls below 0.8 bars.
4.5 Ionization Flame Control:
The burner cuts off the gas automatically when there is no flame on its surface or the flame goes out due to any reason
and the user is warned via the failure code.
4.6 Safety Valve (3 bars):
Protects the heater system and boiler against probable high pressure.
4.7 Automatic Air Purger:
Provides the discharge of the air in heater system and prevents air compression within the system.
4.8 Frost Safety System:
It is developed for preventing the heater system and boiler against freezing. It is controlled by the sensor located at
the main heat exchanger outlet. When the water temperature falls to +8ºC, only the circulation pump and burner are
activated and turned off after raising the water in the heater circuit to 36ºC. For this function to operate, the incoming
power and gas must be on even if the boiler is turned off.
4.9 Low Voltage Safety System:
In case of low voltage supply from the network, the boiler continues to operate safely up to 186 Volts.
4.10 Automatic Bypass System:
By creating a short circuit between the heater stream and return piping, the boiler is prevented against damage.
4.11 IP X 4D Electrical protection:
Electronic card block is protected against water splash and humidity.
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ECOFEL BOILER SERVICE MANUAL
5. Detailed View Diagram:
5.1 Piping Circuit Diagram:
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1 Heater return piping
2 Cold water inlet
3 Gas inlet
4 Usage hot water outlet
5 Heater stream piping
6 Gas valve
7 Usage water temperature sensor
8 Heater water temperature sensor
9 Ignition electrode
10 Burner
11 Heat exchanger
12 Fan
13 Pressure switch
14 Expansion tank
15 Limit thermostat
16 Ionization electrode
17 3 bars safety valve
18 Automatic air purger
19 Circulation pump
20 Flow control sensor
21 Filler valve
A Filler Valve
B Flow Control Switch
C 3 Bars Safety Valve
D Circulation Pump
EAutomatic Air Purger
FExpansion Tank
G Pressure Switch
H Hermetic Flue Kit
I Fan
J Heater Circuit Sensor
KLimit Thermostat
L Main Heat Exchanger
M Burner
N Gas Valve
0 Bypass
P Closed Circuit Pressure Pressure Switch
Q Hot Usage Water Sensor
R Cold Water Inlet
S Hot Usage Water Outlet
T Heater Water Stream
U Heater Water Return
V Gas Inlet

ECOFEL BOILER SERVICE MANUAL
6. Functional Components:
6.1 Fan:
It is located above the combustion chamber.
They are specially designed for boilers and they operate efficiently and very
quietly. Steel propeller is balanced dynamically and fastened to the motor
axle with three screws. Its function is to vacuum the fresh air required for
combustion into the combustion chamber while evacuating the burnt exhaust
gases.
6.2 Air Pressure Switch:
It is a safety component controlling the operation of the fan and evacuation
of burnt gases in hermetic boilers. It is connected to the venturi on the fan
motor via a silicon hose. As soon as the fan motor starts, the effect of the
pressure formed on the venturi turns off the contacts. Thus, the electronic
card receives the information that the fan is running and the exhaust gas line
is clear.
6.3 Burner:
It is formed by coupling a group of stainless steel perforated
pipes by leaving an appropriate distance between them. The gas
coming from the valve passes through the injectors thus entering
the venturi of the burner and here it is mixed with primary air. It
then gets out through the numerous holes on the pipes and start
burning. The air drawn from the combustion chamber is used as
the secondary air. The quantity of primary air is self adjusted
according to the diameter of the injectors and does not require
adjustment during the initial starting phase.
During periodic maintenance, burner injectors should be
cleaned. Various dirt may partially congest the burner injectors,
thus causing a bad combustion that shows itself with a long and
smoky flame.
6.4 Circulation Pump:
Circulation pump is mounted on the return line of the heating circuit; its function is to circulate the water in the closed
system during heating and usage water production. In the body of the circulation pump there is an automatic air
purger. Circulation pump used in Airfel boilers has 5 mSS total head.
Brand : Grundfos
Model : 15/50 Three stages
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HEATER CIRCUIT CIRCULATION PUMP
3rd STAGE
2nd STAGE
1st STAGE

ECOFEL BOILER SERVICE MANUAL
6.5 Gas Valve:
Honeywell Moduplus VK4105 model gas valve is used on the boiler.
There are 2 safety and 1 regulating valves. Safety valves are
mechanically connected in series, however electrically they function
as if they are parallel connected. The valve’s having two coils connected in
parallel electrically, but in series mechanically is designed to obtain a
safer structure. Modulator is a component of the gas valve. Voltage
variation in the coil provides proportional opening of the valve and
delivery of right amount of gas to the burner, thus providing flame
modulation. In case of an abnormal situation, gas valve will shut off the
gas rapidly. In order to reactivate the boiler, it must be reset and the
abnormal situation must be corrected.
6.6 Expansion Tank:
It is located at the back of the boiler. Has 7 liters volume, rubber
diaphragm, nitrogen pre-loading at 1 bar pressure. As the water in
heater piping gets hotter, it will expand in volume. This expansion
pressurizes the nitrogen in the tank and compresses the nitrogen with
the help of diaphragm. The excess pressure thus formed in the system
is absorbed by the expansion tank and system pressure is continuously
kept stable. Care must be taken for anti-freeze products to be added
to the water in closed system against freezing should not be harmful for
the rubber diaphragm. The function of expansion tank is to counterbalance
the increase in volume of water in a closed cycle. Operation pressure
is 3 bars and maximum operation pressure is 4.3 bars.
6.7 Main Heat Exchanger:
It is located in the combustion chamber. Bi-thermic
(dual pass) main heat exchanger is composed of an
oval profile two pipe coil. To increase the heat transfer
surface, lamella is placed on the pipes.
Turbulators are placed in the pipes. Turbulators prevent
boiling of the water regionally. The smoke due to
combustion provides heating of the water in heat
exchanger by passing through the lamella on the surface
of the heat exchanger. Additionally, heat exchanger
surface is coated with a silicon based paint against
overheat and corrosion.
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ECOFEL BOILER SERVICE MANUAL
6.8 Hydraulic Block:
6.9 Automatic Bypass system:
It is located in the right hydraulic block. Copper By-Pass pipe provides
passage between heater stream and right hydraulic block. By-pass is active
in usage water and heater modes. Function: Under normal conditions, if
the pressure losses in piping are low, Bypass will not open and hot water
in the heater circuit will flow to piping. If pressure losses are high, water
will lose all its heat and return to the boiler; this considerably cooled water
shall cause thermal shocks in the heat exchanger and shall also cause
condensation by cooling down the flue kit gas temperature. To avoid this
situation, automatic by-pass shall prevail over the spring tension and
by-pass valve will be opened. Thus, a short circuit will occur between
stream and return of heater piping and water coming out the heat
exchanger will be mixed with returning water.
6.10 Ignition and Ionization Electrode:
It is located in front of the burner, at right and left foremost position. Inside of the
electrodes are metal. Outer surface is coated with ceramic material which functions
as electrical insulator.
The ignition electrode is mounted such that the distance of its end to the
surface of the burner is 3mm.
Its function is to provide spark formation by making the high voltage transmitted
from the ignition transformer jump on the surface of the burner.
Lonization electrode is mounted at 3mm distance to the surface of the burner.
Its function is to provide the transmission of the electric current generated on the
electro by the flame formed on the surface of the burner.
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Flow Control System
Safety Valve
3 Bars
Flow Control
Component
Water Pressure
Pressure Switch
Pump
Water Filler Tap

ECOFEL BOILER SERVICE MANUAL
6.11 Limit Thermostat:
It is mounted on main heat exchanger outlet pipe via a clip.
It prevents damage to the boiler due to overheat. Limit thermostat
shuts down the boiler when water temperature at main heat exchanger
outlet reaches 102ºC (±4ºC). When the water temperature cools
down to 80ºC ± 12ºC, boiler should be reset for restarting. It is an
automatic reset thermostat. It is bimetal type.
6.12 NTC Sensor:
First one is used for measuring heater water temperature on the main heat
exchanger outlet pipe. The second one is located on the hot usage water
outlet of plated type heat exchanger.
NTC (Negative Temperature Control) Sensor is a thermistor, resistance
value of which falls down with the increase in temperature.
Modulation circuit is based on the adjusted resistance value of the usage
water or heater circuit temperature adjustment button. After comparing the
adjusted value with the reading of the NTC sensor (depending on the supply
voltage passing over) the information is transmitted to the main card; based
on this information main card changes the voltage value of the gas valve
coil providing modulation. To sum up, when there is an increase in water
temperature, voltage value of the gas valve coil falls down and gas valve reduces
the gas pressure in burner through modulation.
Heater NTC Sensor Usage water NTC Sensor
6.13 Flow Control Switch and Mechanism:
Its function is to sense usage water demand. It will start to rotate
a wheel according to the water flow rate at usage water inlet when
water flow begins (hot usage water tap is opened) and at least
2.7 l/min water begins to pass. The rotation of the magnetic field
above this wheel is detected by the sensor located at the top and
transmitted to the main card after converting to frequency. In this
way, the frequency transmitted to the main card and the quantity
of water flowing from the tap is determined, thus reaching the
desired temperature of usage water with ±1ºC accuracy.
There is a gauze filter at the cold water inlet, protecting the flow
switch against piping dirt.
6.14 Filler Valve:
Provides connection between heater circuit and usage water
circuit. By the help of this valve, water can be filled in the heater
system from the mains.
- 10 - Revision Date: 29 February 2008, Rev. No: 0
TEMPERATURE
(ºC)
RESISTANCE
(kΩ)
0 27
10 17
20 12
25 10
30 8
40 5
50 4
60 3
70 2
80 1.5

ECOFEL BOILER SERVICE MANUAL
6.15 Flow Limiter:
Function of the flow limiter is to reduce the water flow at the inlet of usage water heat
exchanger. With its o-ring inner structure, it limits the quantity of water flowing into
the boiler for heating with 10 l/min.
6.16 Combustion Chamber:
The walls of the combustion chamber are bended from sheet metal so
as to allow the placement of mineral wool. Mineral wool is made of
ceramic and fiber material. It is not harmful for environment. It has
insulating characteristic. Operating temperature of mineral wool is
about 1200ºC and its melting temperature is nearly 1700ºC. Therefore,
it is not affected by direct contact with the flame of the burner. It
provides the transfer of heat generated on the surface of the burner
fully to the face of heat exchanger.
6.17 Main Card:
The functions and components of the boiler are controlled by the main
card. Display card allows adjusting the user settings and display of failure
codes and water temperatures.
6.18 Water Pressure Pressure Switch:
The pressure switch located on the left side of the hydraulic
block prevents waterless operation of the boiler by opening and
closing with the mechanical motion gained from a diaphragm
unit. If the primary circuit (closed circuit) pressure falls below 0.8
bars, the boiler delivers failure. The boiler is put into use again
by filling water to the closed circuit from boiler filler valve.
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Pressure pressure switch

ECOFEL BOILER SERVICE MANUAL
6.19 Safety Valve:
Its function is to protect the heater piping and the boiler against pressure increases due to
volume increase of the heated water. If the water pressure in the heater piping exceeds 3
bars, the spring in the safety valve pushes the valve and opens automatically. Thus, the
pressure in the piping is reduced. In this case, the boiler should be shut down and water
pressure should be reduced to 1.5 bars by opening the discharge valve after the water in
the system cools down. Safety valve should not be used for discharging the piping water.
6.20 Thermo-manometer:
Thermo-manometer measures the boiler outlet water temperature with the
capillary tube connected to the heating water heat exchanger outlet. With the
other capillary tube, it shows the water pressure in the system. It is an analog
gauge.
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ECOFEL BOILER SERVICE MANUAL
7. Operation in Heater Mode:
When the boiler is in the heater operation mode it checks all circuit components. If there is water pressure of more
than 0.8 bar in the boiler, circulation pump starts working. The main card compares the heating water temperature
data coming from the stream sensor with the temperature set by the user via the heater temperature adjustment button
on the front panel.
Fan starts running; the low pressure generated in the hermetic cabin turns off the pressure switch micro switch contact
by moving the pressure switch diaphragm with pressure measurement probes on the fan. Thus, main card receives
the information that the fan is running. By transmitting voltage to the gas valve and ignition transformer, main card
provides spark formation with the ignition electrode on the burner. In this way, flame is formed on the burner with
minimum ignition gas pressure. The ionization electrode on the burner transmits the current (at nano amperes
strength) generated by the effect of the flame to the main card. Main card detects the flame formation on the burner
and brings the heater water to the temperature set by the user by applying the pre-set partial load gas pressure from
the gas valve to the burner. As it approaches closer to the desired temperature, main card performs modulation by
reducing the voltage transmitted to the gas valve and when the heating water in the system reach 5ºC above the
desired temperature, main card puts out the flame by cutting the energy transmitted to the gas valve. Burner waiting time
starts. Fan stops. Circulation pump keeps running. When the pre-set burner waiting time is over, the main card
measures the temperature of the heating water. If heating water temperature is 3ºC below the desired water
temperature, burning process restarts.
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ON/OFF controls the components
of the boiler.
System pressure is measured.
It should be above 0.8 bars.
Circulation pump starts.
Heat demand comes from the
heater temperature adjustment
button or room thermostat
Current temperature < 3ºC From
adjusted temperature = operation
demand continues
Fan motor starts.
Air pressure switch transmits information
to the main card that the fan is running.
Current is transmitted to the gas
valve and ignition electrode and flame
is generated.
Ionization electrode detects the
flame formation and sends information to
the electronic card
Boiler outlet water temperature >5ºC From
adjusted temperature = Boiler stops.

ECOFEL BOILER SERVICE MANUAL
8. Operation in Usage Water Mode:
When a hot water tap is turned on while the boiler is in heater or usage water mode and when water flow rate from
the flow control switch is more than 0.3 bar (2.7 l/min), the wheel within the flow control rotates and informs the flow
sensor. Thus, the information that water is on is transmitted to the main card. Closed circuit water pressure is
checked. Circulation pump stops. As the fan starts running, the low pressure formed in the hermetic cabin turns off
the pressure switch micro switch contact by moving the pressure switch diaphragm with pressure measurement
probes on the fan. Thus, main card receives the information that the fan is running. By transmitting voltage to the
gas valve and ignition transformer, main card provides spark formation through the ignition electrode on the burner.
In this way, flame is formed on the burner with minimum ignition gas pressure. The ionization electrode on the burner
transmits the current (at nano amperes strength) generated by the effect of the flame to the main card. Main card
detects the flame formation on the burner. By comparing the desired usage water temperature with the temperature
it measures from the usage water sensor, the main card increases or decreases the voltage it transmits to the mod-
ulation coil. At 8ºC above the desired temperature, the burner shuts down. Constant hot water comfort with ±1 de-
gree accuracy is provided by modulation.
- 14 - Revision Date: 29 February 2008, Rev. No: 0
ON/OFF Controls the components
of the boiler.
System pressure is measured.
It should be above 0.8 bars.
Pump Does not Operate.
Demand comes from the usage water
temperature adjustment button.
Fan motor starts.
Air pressure switch transmits information to the
main card that the fan is running.
Current is transmitted to the gas valve and
ignition electrode. Flame is generated.
Ionization electrode detects the flame formation
and sends information to the electronic card
In gas valve modulation, hot water
with ±1ºC accuracy is obtained.
Boiler outlet water temperature >8ºC From
adjusted temperature = Boiler shuts down.
When hot water tap is turned off, the burner
goes out. The pump discharges the heat
on it, the boiler stops.

ECOFEL BOILER SERVICE MANUAL
9. Control Panel:
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Item Nr. Symbol Function Description Explanation
1Program timer (Optional) Used for daily or weekly programming of the operation time of the
boiler.
2Thermo-manometer
Indicates heater outlet water temperature and closed circuit water
pressure.
It should be around 1.5 bars.
3Usage water temperature
adjustment button
Allows the adjustment of usage water temperature to the desired
value between 35-55ºC.
Usage water cancelled mode
When hot usage water is not required from the boiler, hot usage
water adjustment button is turned to this symbol. No hot water will
be produced even if the hot water tap is turned on.
Exhaust gas emission
measurement function
This function is used by the authorized service when measuring
the exhaust gas emission values. When the usage water temperature
adjustment button is turned to this symbol, the boiler will operate
at maximum power.
4Green led indicating that usage
water is operating
When the boiler is in summer mode, this led is on continuously.
When the tap is turned on, the led starts to blink indicating that
the boiler is operating in the hot usage water mode.
5Red led indicating the failures
during operation
In any failure in the boiler due to any reason, this led lights and
warns the user. The boiler shall be restarted by turning the heater
temperature adjustment button to Off and then readjusting the
desired temperature.
6Green led indicating that
heater mode is operating
When the boiler is in winter mode, this led lights continuously. If
the boiler starts operating to heat the house, the led will blink to
indicate that the boiler is operating in the heater mode.
7Heater temperature
adjustment button
Allows the adjustment of heater water temperature to the desired
value between 35-80ºC. In winter mode the boiler will perform
both heating and hot usage water functions.
Summer mode In summer mode the boiler will perform only hot usage water
function.
Standby
OFF
Reset mode
The boiler is off in standby mode. In this mode only frost protection
ant pump anti-blockage functions are active.

ECOFEL BOILER SERVICE MANUAL
9.1. Product Label:
TYPE NR
H3302001240100 14 DIGITS
10. Installation Instructions:
10.1 Installation Location and Conditions:
• Hermetic boilers should be installed at locations permitted
by the gas organizations. However, the location of the ap-
pliance should allow the evacuation of burnt gases out
and intake of required fresh air from outside.
• In case of installing at outdoors, the boiler should be pro-
tected against external factors that may negatively effect
its operation and may cause the warranty conditions to become invalid (wind, humidity, frost, etc. ) for this reason
the boiler should be installed at a location having good ventilation and protected from external factors.
• The wall on which the boiler will be installed should bear hanging of 35 kg load and should be of fireproof material.
• Do not install the boiler in environments containing flammable and explosive chemicals.
• If the combi boiler is being replaced (in place of the old one), all piping tubes should be cleaned prior to installation.
• Safety valve should be connected to a water outlet.
• Usage water circuit operational pressure is 10 bars.
• It is wrong to replenish heater system water frequently. Frequent replenishment of water shall cause calcification
within the heat exchanger.
• Strainer (filter) should be installed on heater system stream and return pipes. At the heater piping return ¾ filter
on ¾ valve, at the usage water inlet ½ filter on ½ valve should be installed.
• 220 Volts / Hz power supply should be provided for the boiler. In places where voltage is not stable, voltage
regulator should be used.
Determining the Volume of Heating System
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MODEL Ecofel/KB1-24CE
NOx Class 4
Type C12
Category
Gas Type (G20) Natural Gas P: 20mbars [X]
Gas Type (G30) LPG P:30 mbars [ ]
Nominal Load (Q) Min: 10.2 kW Max:26.2kW
Nominal Power (P) Min: 9.02 kW Max 24.3 kW
Electrical Power 220V-50Hz/110W
Electrical Protection Class IPX4D
Usage Water Flow (ΔT=30ºC) 10 l/min
Usage Water Max. Operational Pressure 10 bars
Heater Circuit Max. Operational Pressure 3 bars
Usage Water Circuit Temperature (ºC) 35-55
Heater Circuit Temperature (ºC) 35-82
Destination Country TR
Manufactured in AIRFEL Production Facilities,
AIRFEL HEATING and COOLING SYSTEMS IND. TRADE INC.
In ECOFEL KB1-24CE model boilers, declaration label is
located at the right side of the appliance. All characteristic
data and serial number (production date, production
code) of the appliance are given on the declaration label.
SERIAL NUMBER
15 DIGITS
DAY OF MANUFACTURE
1 Monday
2 Tuesday
3 Wednesday
4 Thursday
5 Friday
6 Saturday
7 Sunday
YEAR OF MANUFACTURE
20 07
20 08
20 09
20 10
21 11
20 12
20 13
23 14
20 15
20 16
23 17
20 18
WEEK OF MANUFACTURE
1st WEEK 24th WEEK 47th WEEK
2nd WEEK 25th WEEK 48th WEEK
3rd WEEK 26th WEEK 49th WEEK
4th WEEK 27th WEEK 50th WEEK
5th WEEK 28th WEEK 51th WEEK
6th WEEK 29th WEEK 52th WEEK
7th WEEK 30th WEEK
8th WEEK 31st WEEK
9th WEEK 32nd WEEK
10th WEEK 33rd WEEK
11th WEEK 34th WEEK
12th WEEK 35th WEEK
13th WEEK 36th WEEK
14th WEEK 37th WEEK
15th WEEK 38th WEEK
16th WEEK 39th WEEK
17th WEEK 40th WEEK
18th WEEK 41st WEEK
19th WEEK 42nd WEEK
20th WEEK 43rd WEEK
21st WEEK 44th WEEK
22nd WEEK 45th WEEK
23rd WEEK 46th WEEK
AA WEILI BI-THERMIC 24 KW
AB WEILI MONO-THERMIC 24 KW
AC WEILI MONO-THERMIC 28 KW
BA AIRFEL BI-THERMIC 24 KW
BB AIRFEL MONO-THERMIC 24 KW
BC AIRFEL MONO-THERMIC 28 KW
BOILER TYPE
U Panel Radiators
Z Convectors
Y Radiators
X Floor heating system
system volume (liters)
heat power (kW)
* When the quantity of water in the system exceeds 100 l, capacity of
the expansion tank should be increased proportionally. The
expansion tank in the boiler is 7 liters.
NUMBER OF MANUFAC-
TURED ITEMS WITHIN THE
DAY
YEAR OF MANUFACTURE
WEEK OF MANUFACTURE
DAY OF MANUFACTURE
WORK ORDER NR
BOILER TYPE
BOILER MANUFACTURED IIN
HENDEK

ECOFEL BOILER SERVICE MANUAL
10.2 Installation:
A. Mounting the Suspension Hook of the Appliance
• Place the template on the wall.
• Mark the fixation points.
• Remove the template and drill the marking points on the wall.
• Fix the suspension hook on the wall with dowels.
• Make sure that the hook fully grips the boiler when suspended
on the wall and the boiler does not lean forward. Check with
water balance that the boiler is mounted evenly.
B. Installing in Cabinet or Outdoors
• When installing in cabinets, the specified service spaces
should be left.
• In case of installing at outdoors, the boiler should be protected
against external factors that may negatively effect its operation
and may cause the warranty conditions to become invalid.
• If the appliance is covered with a cabinet in open balcony, five
sides of the cabinet must be closed and insulated, and it
should also cover the heating and usage water piping.
10.3 Flue Kit Installation:
• Hermetic flue kit connection must necessarily protrude outdoors. Flue kit should be installed with 3 degrees
inclination.
• If the wall through which the flue kit is passing is not made of appropriate material, then the flue kit should be
coated with insulating material at least 20 mm thick.
• Do not pass flue kit pipes through the ceiling. If passing through the ceiling is indispensable, the flue kit pipe should
be coated with insulating material at least 20 mm thick.
• The space between the flue kit pipe and the wall it is passing should not be filled with hard material such
as concrete or cement as this will cause inconvenience for maintenance.
• Flue kit pipe should protrude out fully and it should not be blocked.
• It should be ensured that waste gas evacuation and incoming air flow is implemented properly.
• The distance between the top level of the flue kit pipe and ceiling should not be less than 50 cm.
• If it is necessary to use additional pipes, all seams should be thoroughly sealed. There should not be exhaust gas
leakage into the house.
• Combi boiler should be installed with flue kit pipe(s) and the pipes should be extended out. It is strictly forbidden
to use the combi boiler without hermetic flue kit.
• Only C12 type homocentric flue kit can be installed to the system.
• It is advisable to fix every one meter additional flue kit to the wall with fixing brackets.
- 17 - Revision Date: 29 February 2008, Rev. No: 0
Standard flue kit pipe
Standard elbow
Additional flue kit pipe
A View
A View

ECOFEL BOILER SERVICE MANUAL
10.4 Homocentric Flue Kit Application:
In homocentric (Standard) flue kit connections, two metal rings for limiting the exhaust gas pipe are supplied in the
user’s manual bag. Depending on the flue kit length, the corresponding ring should be placed or installed in the
exhaust gas pipe. In the table below, usage of the metal rings according to flue kit length is given. Improper usage
of the metal rings shall impair combustion and cause decline in efficiency. Therefore, care should be taken for proper
usage of the metal rings.
Homocentric flue kit pipes can be installed in compliance with installation requirements.
In the above table, horizontal lengths of homocentric flue kit pipes with and without flow limiting ring.
Note: Each 90 degrees elbow is equivalent to 1m flue kit loss, i.e. it can be assumed that for each elbow installed 1m pipe is added to the system.
10.5 Installation of Hydraulic Systems:
Fasten water inlet and outlet pipes as defined below.
Heater system and usage water system connections are described below.
Heater stream piping ¾”
Usage hot water outlet ½”
Gas Inlet ¾”
City Water Inlet ½”
Heater Return Piping ¾”
• On the radiator return line ¾” strainer and on the top and bottom of the strainer ¾” full passage ball valves should
be installed.
• At the mains water inlet ½” strainer and ½” full passage ball valve should be installed.
• To the gas line of the appliance ¾” gas valve and ¾” gas filter should be installed.
• If there is an extra hot usage water generator connected to the piping, it should be blocked with blind plug or valve
after the installation is completed.
- 18 - Revision Date: 29 February 2008, Rev. No: 0
Throttle shim
Flue Kit Horizontal Length
(m) THROTTLE SHIM DIMENSIONS 90 Degrees Elbow Loss
1 m less Ø 41
1 meterbetween 1m and 2m Ø 40
more than 2 meters Shall not be installed