Warmhaus EWA 2525C User manual

CONDENSING COMBI BOILERS
USER MANUAL
EWA 2525C
EWA 2530C

0089_00.WUK210702
EWA 2525C 25 kW
Our company are constantly striving to improve our
products and reserve the right to modify the details given
in this documentation at any time without notice. This boiler is not designed to be used by persons (including
children) with limited mental and sensory capabilities or
by persons who do not have enough experience and/or
knowledge, unless they are supervised by a person who is responsible
for their safety or they have been instructed by him/her about how to
use the boiler. Children must be supervised to ensure that they do not
play with the boiler.
These instructions are only meant to provide customers
with user information regarding the appliance.
0090_00.WUK210702
EWA 2530C 30 kW

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CONTENTS
1. INTRODUCTION ........................................................................................................................................................4
1.1. GENERAL WARNINGS................................................................................................................................................... 4
1.2. GENERAL WARRANTY CONDITIONS....................................................................................................................... 4
1.3. BOILER GAS CATEGORIES & DESTINATIONS........................................................................................................ 5
1.4. GAS LEAKAGES ............................................................................................................................................................. 6
2. USER’S SECTION.......................................................................................................................................................7
2.1. GENERAL WARNINGS FOR USER ..............................................................................................................................7
2.1.1. Use of boler............................................................................................................................................................................................................7
2.1.2. Selecton of On/O/Stand-by and Summer/Wnter Modes................................................................................................................... 8
2.1.3. On/O/Stand-by Postons............................................................................................................................................................................... 8
2.1.4. Operaton n Wnter Mode................................................................................................................................................................................ 8
2.1.5. Operaton n Summer Mode............................................................................................................................................................................. 9
2.1.6. Shuttng o the Boler ....................................................................................................................................................................................... 9
2.2. USE WITH ROOM THERMOSTAT (OPTIONAL) .....................................................................................................10
2.3. USE OF OUTSIDE TEMPERATURE SENSOR (OPTIONAL) .................................................................................10
2.4. CUSTOMIZING BOILER FEATURES ..........................................................................................................................11
2.5. TROUBLESHOOTING .................................................................................................................................................. 12
2.6. RECOMMENDATIONS FOR ECONOMICAL USE OF.............................................................................................16
2.7. ISSUES REQUIRED TO BE TAKEN INTO CONSIDERATION FOR WARRANTY CONDITIONS ....................16

4warmhaus.co.uk
1. INTRODUCTION
Warmhaus was established in 1996 and is an aliate of Beycelik Holding
which produces panel radiators, high capacity wall hung condensing
boilers and steel panel radiators. Beycelik Holding has also branches
in automotive, energy, tourism and insurance and currently provides
employment opportunities for almost 5.000 people.
We thank you for chosing the Warmhaus boiler to maintain your heating
and domestic hot water comfort for long years. Warmhaus products are
manufactured in accordance with EU standards and exported to many
countries.
1.1. GENERAL WARNINGS
This book should be carefully protected and referred to when necessary,
as it contains important information regarding operation of the product.
Please read these instructions fully before operating the appliance:
Radiator and DHW (Domestic Hot Water ) installations should be
performed by a competent and certified engineering company in
accordance with legal regulations in force.
This appliance must only be installed by a competent Gas Safe
registered engineer and if in Ireland an RGI (Registered Gas
Installer) and failure to adhere to this could lead to prosecution.
In order to enable use of the boiler with LPG bottles or LPG tanks,
conversation of the boiler should be performed by our authorised
Warmhaus service. Project design and application for LPG use
should be performed by the company supplying the tank in
accordance with local and legal rules.
1.2. GENERAL WARRANTY CONDITIONS
Manufacturer company cannot be held responsble for njury
of people, other lvng thngs (anmals, plants) or damage to
propertes due to nstallaton by unauthorsed people.
The maintenance and repairs as the result of failure of the product within
the warranty period due to material, production and installation errors shall
be performed as free of charge without claiming any workmanship costs
and spare part payments.
The intended use for this appliance is to heat
water and supply DHW in domestic premises.
Always refer to the appliance data badge for correct specifications and
ensure the boiler is operating within the safety settings outlined by
Warmhaus.
The installation of the appliance and controls must be done in accordance
to the current Gas Safety (Installation and Use) Regulations
Any intervention on a sealed component is forbidden.
Maintenance and repairment of the appliance must only be carried
out by a competent Gas Safe registered engineer and if in Ireland
an RGI (Registered Gas Installer)
Children must not operate the boiler.
These installation instructions only apply to GB and IE and must
be adhered to with the exception of all statutory regulations.
Boilers bear CE mark in accordance with below given directives:
- Gas Appliances Directive 2009/142/EC
- Boiler Eciency Directive 92/42/EEC
- Low Voltage Directive 2014/35/EU
- Electromagnetic Compatibility Directive 2014/30/EU
Manufacturer: WARMHAUS Isıtma ve Soğutma Sistemleri Tic. A.Ş. Bursa
Işıktepe OSB Mah. Park Cad. No:10 16140 Nilüfer-Bursa / Türkiye
WARMHAUS
Warmhaus Authorised Technical Service Centres maintain an assurance
regarding quality and professionalism. WARMHAUS is not responsible
for damages arising from repairs, part replacements and maintenances
performed by third persons and companies and product remains out of the
warranty scope under such conditions.
1015
WARMHAUS A.Ş. reserves the right to make all kinds of technical and
commercial amendments without giving information and rejects all
responsibilities depending on misspelling.

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1.3. BOILER GAS CATEGORIES & DESTINATIONS
Appliance Categories Gas Type
Gas Inlet
Supply
Pressures
Used Gas Countries of Destination
**
I 2H Natural Gas 20 mbar G20 AT, BG, CH, CZ, DK, EE, ES, FI, GB, GR, HR, IE, IT, LT, LU, LV, NO, PT, RO, SE, SI, SK, TR
I 2H Natural Gas 25 mbar G20 HU
I 2E Natural Gas 20 mbar G20 DE, LU, PL, RO
I 2E+ Natural Gas 20 mbar G20 BE, FR
I 2E(S) Natural Gas 20 mbar G20 BE
I 2ELL Natural Gas 20 mbar G20 DE
II 2H3P Natural Gas 20 mbar G20 CH, CZ, ES, GB, GR, HR, IE, IT, LT, PT, RO, SI, SK
II 2H3+ Natural Gas 20 mbar G20 CH, CY, CZ, ES, GB, GR, IE, IT, LT, PT, SI, SK, TR
II 2E+3+ Natural Gas 20 mbar
25 mbar G20 BE, FR
II 2E+3P Natural Gas 20 mbar
25 mbar G20 BE, FR
II 2H3B/P Natural Gas 20 mbar G20 AT, CH, CY, CZ, DK, EE, FI, GR, IT, LT, NO, RO, SE, SI, SK
II 2E3B/P Natural Gas 20 mbar G20 DE
II 2ELL3B/P Natural Gas 20 mbar G20 DE
I 2L Natural Gas 25 mbar G25 NL
I 2E+ Natural Gas 25 mbar G25 BE, FR
I 2ELL Natural Gas 20 mbar G25 DE
II 2L3P Natural Gas 25 mbar G25 NL
II 2L3B/P Natural Gas 25 mbar G25 NL
II 2ELL3B/P Natural Gas 20 mbar G25 DE
I 3+ Buthane Gas 28-30 mbar
37 mbar G30 BE, CH, CY, CZ, ES, FR, GB, GR, IE, IT, LT, PT, SI, SK
I 3B/P Buthane Gas 30 mbar G30 BE, CY, CZ, DK, EE, FI, GB, GR, HU, HR, IT, LT, NL, NO, RO, SE, SI, SK, TR
I 3B/P Buthane Gas 50 mbar G30 AT, CH, DE, FR, SK
II 2H3+ Buthane Gas 28-30 mbar
37 mbar G30 CH, CY, CZ, ES, GB, GR, IE, IT, LT, PT, SI, SK, TR
II 2E+3+ Buthane Gas 28-30 mbar
37 mbar G30 BE, FR
II 2H3B/P Buthane Gas 30 mbar G30 CY, CZ, DK, EE, FI, GR, IT, LT, NO, RO, SE, SI, SK
II 2H3B/P Buthane Gas 50 mbar G30 AT, CH, SK
II 2E3B/P Buthane Gas 50 mbar G30 DE
II 2L3B/P Buthane Gas 30 mbar G30 NL
II 2ELL3B/P Buthane Gas 50 mbar G30 DE
I 3P Propane LPG 37 mbar G31 BE, CH, CZ, ES, FR, GB, GR, HR, IE, IT, LT, NL, PL, PT, SI, SK, TR
II 2H3P Propane LPG 37 mbar G31 CH, CZ, ES, GB, GR, HR, IE, IT, LT, PT, RO, SI, SK
II 2L3P Propane LPG 37 mbar G31 NL
II 2E+3P Propane LPG 37 mbar G31 BE, FR
II 2E+3P Propane LPG 37 mbar G31 BE, FR
** EN 437+A1:2009, Codes for the representation of gases and names of countries and their subdivisions; Part 1: Country codes (ISO 3166-1:2006)

6warmhaus.co.uk
1.4. GAS LEAKAGES
IF YOU SMELL GAS:
DURING EMERGENCIES
INFORMATION: You can visit web sites of local gas authorities and NATURAL GAS EMERGENCY sections.
Advce: Please take note local emergency phone numbers.
AMBULANCE POLICEFIRE
DEPARTMENT
NATURAL GAS
EMERGENCY
Do not use lighters /
matches, do not smoke.
Turn o the gas supply
at the gas meter or an
appropriate emergency
control valve
Immediately
evacuate the
place
Call the National
Gas Emergency
Service –
0800111999
or in Ireland
1850 20 50 50
Do not make
any intervention
on installation.
Never close vent covers
ensuring discharge of the
gas from the environment
in case of a natural gas
leakage.
Do not use
the door bell.
Do not use
mobile phones
Do not operate electric
switches or unplug any
appliances.
Ventilate the environment
and prevent people from
entering the property
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2. USER’S SECTION
2.1. GENERAL WARNINGS FOR USER
2.1.1. Use of boiler
Perform below given controls prior to use:
• Ensure that radiator/heating system, tap water and gas valves located
in your boiler are open, the heating system pressure is between 1 - 1,5
bar and system air is discharged,
• Gas is available in your gas line (you can control by igniting one of your
gas ovens),
• Make sure there are no combustible materials within the immediate
vicinity of the appliance or any corrosive chemicals that can damage
the appliance.
• If a room thermostat or control device is connected, ensure that it is at
ON position.
Our boiler has a built in frost protection (as long as the appliance is ON
and gas provided) for the system water contained within the boiler only, so
provisions need to be installed to protect the system pipe work in unheated
areas.
Turn OFF the boiler before any maintenance and repair action.
Follow below given main rules:
• Do not clean external frame of boiler while is functioning and do not use
easily flammable materials.
• Do not touch electricity cables.
• In case cables are damaged, the boiler and fuse switches and do not use
the boiler.
• Electrical cables of boiler and its accessories should be replaced by the
Authorised Service.
Safety:
In your own interest, and that of safety, it is the law that this boiler must
be installed by a Gas Safe Registered In IE, the installation must be carried
out by a Registered Gas Installer (RGII) and installed in accordance with the
current edition of I.S. 813 “Domestic Gas Installations”, the current Building
Regulations and reference should be made to the current ETCI rules for
electrical installation.
It is essential that the instructions in this booklet are strictly followed, for
safe and economical operation of the boiler.
Important Notes:
• This appliance must not be operated without the casing correctly fitted
and forming an adequate seal.
• If the boiler is installed in a compartment then the compartment MUST
NOT be used for storage purposes.
• If it is known or suspected that a fault exists on the boiler then it
MUST NOT BE USED until the fault has been corrected by a Gas Safe
Registered Engineer or in IE a Registered Gas Installer (RGII).
• Under NO circumstances should any of the sealed components on this
appliance be used incorrectly or tampered with.
• This appliance is not intended for use by persons (including children)
with reduced physical, sensory or mental capabilities, or lack of
experience and knowledge, unless they have been given supervision or
instructions concerning use of the appliance by a person responsible for
their safety.
Fgure 1 Control panel of Ewa Combi Boiler
Fgure 2 Control Panel with Touch Screen of Ewa
BUTTONS and PUSHBUTTONS
1. MODE, position adjustment button.
2. RESET button.
3. Radiator (CH) water temperature adjustment button.
4. DHW temperature adjustment button.
5. Software connection slot.
6. Digital display screen
7. Temperature, data and failure codes display
8. Radiator symbol is seen when combi is functioning in (CH) position.
Symbol flashes at heating steps or when radiator temperature
adjustment is made.
9. Flame symbol is only seen when boiler is active (burning in combi);
when system detects availability of flame. It is seen as symbol in case of
failure.
10. DHW tap symbol is seen at summer and/or winter position of the combi.
Symbol flashes on DHW request or when DHW adjustment is made.
11. Failure indicator.
12. Failure status RESET requirement.
13. Radiator low water pressure.
14. Temperature increasing button.
15. Temperature decreasing
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5
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2.1.2. On/O/Stand-by Positions
The boiler panel does not have ON/OFF button. The boiler must be turned
on/o by using the V circuit breaker connected to the boiler circuit.
The temperature value displayed on the combi screen has a ± 3°C tolerance
depending on environmental conditions not arising from the combi.
RESET: It s used for resettng the falure (f temporary) re-startng the
boler
MODE: Used for Winter/Summer/OFF mode adjustment.
Operating modes and related notifications:
OPERATING MODES EXPLANATIONS:
• OFF
• WINTER► Radiator temperature + °C + tap + radiator is displayed.
• SUMMER► Radiator temperature + °C + tap is displayed.
• CH ON► Radiator Temperature + °C + tap + flashing radiator (symbol)
is displayed.
• DHW ON► DHW temperature + °C + flashing tap (symbol) is displayed.
• CH FROST PROTECTION► Radiator temperature
• °C + flashing radiator (symbol) + when boiler is ignited flame (symbol)
is displayed.
• DHW FROST PROTECTION► CH temperature + °C flashing radiator
and tap (symbol) + when boiler ignited flame (symbol)
• CH/DHW SETTING CHANGE► CH adjustment change will be activated
when radiator symbol rapidly flashes. DHW adjustment change will be
activated when tap symbol rapidly flashes.
• Service technician function radiator + tap displayed. (Only for authorized
service, wait for the function to end without pressing any button or rotating
the button in such case!)
CH : Central Heating
DHW : Domestic Hot Water
When the combi is started for the first time,
screen displays nG letter and then a number
(for instance 24) indicating kW power of the
device
and screenlight is closed. Now, combi is at
STANDBY position. The temperature value
when electricity is supplied to the device
is the temperature value of water in the
installation.
Then, OFF letter is displayed,
OFF
OFF
2.1.3. Operation in Winter Mode
In winter mode, boiler operates both for heating the environment and
providing Domestic Hot Water. Radiator (CH) temperature adjustment is
made with (3) and (4) numbered buttons in Figure 1 Domestic Hot Water
temperature adjustment is made with (6) and (7) numbered buttons and
this temperature is indicated with (9) numbered indicator for Radiator (CH)
and with (11) numbered indicator for Domestic Hot Water.
Radiator temperature is adjusted with button
(3) and Domestic Hot Water temperature
adjustment is made with button(4) and this
temperature is displayed by indicator (7) on
the screen.
In order to shuton the combi, hold MODE
button, whereas a circle starts on the screen,
release the button when circle is
completed.
In such case, combi initially gets in the
Radiator position, its symbol flashes at left
top corner of screen and existing radiator
installation temperature is displayed on the
screen and then screen light turns o. At
that position, you can adjust the temperature
between 25 – 80 °C with the Radiator
temperature adjustment button (3).
You can increase (14) and decrease (15) the
temperature with temperature adjustment
buttons (see.Figure 48) between 25 – 80
°C, screen lights when buttons are pressed
and °C symbol flashes besides the radiator
temperature value.

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2.1.4. Operation in Summer Mode
Boiler only operates for heating the domestic hot water in this mode. In
order to switch to summer mode;
{If you have a ground heating system, as our Authorized
Service adjust your combi for “Low Temperature Operaton”,
maximum temperature shall be limited with the Radiator
temperature adjustment button (3) (e.g. maximum 47 °C)}.
Domestic Hot Water Adjustment at Winter
Position; First press the DHW button (4).
At that position, symbol flashes at right
top corner of the screen and existing DHW
temperature will be seen on the screen and
screen light will turn o.
You can adjust the hot tap water temperature
value between 35 – 60 °C with (14) and (15)
numbered buttons. Screen lights during
temperature change, °C symbol flashes
besides the DHW temperature value. Screen
light turns o after adjustment.
If you are starting the combi for the first time
hold MODE button, and release the button
after the cycle is completed on the screen,
initially combi switches to radiator position,
its symbol will flash on left top corner
of the screen existing radiator installation
temperature shall be indicated on the screen
and screenlight will be turned-o.
In order to switch to DHW position, hold
MODE button and release the button after
completion of cycle on the screen. At that
position, symbol flashes at right top corner
of the screen and existing DHW temperature
will be seen on the screen and screen light will
turn o.
At that position , you can adjust the
temperature between 35 – 60 °C with the
Domestic Hot Water temperature adjustment
button (4). Screen light will be open during
adjustment, tap symbol and Domestic
Hot Water temperature value will flash. You
can adjust the hot tap water temperature
value between 35 – 60 °C with (14) and (15)
numbered buttons. Screen lights during
temperature change, °C symbol flashes
besides the DHW temperature value. Screen
light turns o after adjustment.
2.1.5. Shutting o the Boiler
To set the boiler to OFF position while it is in SUMMER position;
When the MODE button is hold, after the cycle is
completed while screen light is on,
screen will display OFF letter, that means your
combi is OFF.
OFF
To bring combi in OFF position while it is in
WINTER; hold MODE button, after cycle is
completed while the screen light is on, combi
will be in SUMMER position.
When combi is started, flame modulation symbol is seen at the middle section
of the screen. At that position, you can increase (3+14) and decrease
(3+15) the temperature with radiator temperature adjustment buttons
(see. Figure 47-48) (3) between 25 – 80 °C, screen lights when buttons are
pressed and °C symbol flashes besides the radiator temperature value.
Now, your combi is at STANDBY position as OFF.
OFF
Then, upon repeating the same operation, letter
will be displayed on screen after completing the
cycle and screen light turns o.
Analogue manometer is located near to right-bottom side of the
combi. Installation pressure should be seen in this manometer even
in the absence of electricity.
{If you have a ground heating system, as our Authorized
Service adjust your combi for “Low Temperature Operaton”,
maximum temperature shall be limited with the Radiator (CH)
temperature adjustment button (3) (e.g. maximum 50 °C)}.

10 warmhaus.co.uk
2.2. USE WITH ROOM THERMOSTAT (OPTIONAL)
This product can be used together with a room thermostat which can be
purchased separately as an accessory. All Warmhaus thermostats can be
connected with dual-wired cables. Carefully read user’s and installation
instructions given in the Accessory set. When connected to a room
thermostat, the appliance can be operated based on requested room
temperature. With certain models of control units, you may run your boiler
on a daily / weekly programme.
General Utilisation Type
• Please consult our authorised services for room thermostats compatible
with Warmhaus boilers.
• Do not remove device components during operation.
• Do not place the boiler in a position allowing direct sunlight exposure or
near heat sources.
• Manufacturer company shall not be responsible for below given
situations:
a) Faulty installation
b) Making intervention on the device by unauthorised persons
c) Failing to follow instructions given in this book and room thermostat
booklets
Installaton nstructon: Device installation shall only be performed by the
Warmhaus Authorised Service. The dual cable required for installation is
supplied by the dealer/consumer.
Mantenance and Servce Lfe: Warmhaus room thermostat should not
come into contact with water or excessive humidity. Unless an external
damage occurs, the room thermostat does not require any maintenance.
Room thermostat should be installed at 1,50 m height from
ground.
At least 30 cm distance should be available from doors and
windows open for air circulation.
2.3. USE OF OUTSIDE TEMPERATURE SENSOR
(OPTIONAL)
This product can be used together with a Outside Temperature Sensor
which can be purchased separately as an accessory.
When connected to a Outside Temperature Sensor, the appliance runs with
reference to the weater temperature, based on selected heating curve.
Available heating curves are given in figure 5.
Fgure 3 Thermostat position
150 cm
Min.
30 cm
Fgure 4 Boiler controlled by Outside Temperature Sensor
Fgure 5 Heating curves for Outside Temperature Sensor
20
,0
30
,0
40
,0
50
,0
60
,0
70
,0
80
,0
-25-20-15-10-505101520
K=0,75
K=1,5
K=2,2K=3K=4,5K=6K=9
C.H. Flow Temperature °C
Outside Temperature °C
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2.4. CUSTOMIZING BOILER FEATURES
As your boiler has an advanced electronic card, operation conditions and
certain parameters related with your preferences may be changed by
our Authorised Service. Please consult our authorised service when any
changes requested in below given parameters.
(P07) Power Ramp-Up Time.
When boiler starts, there’s a ramp-up time for reaching requested power
from minimum power and this is set as 10 minutes as default. This value can
be set from 0 to 80 corresponding to 0 - 800 seconds.
(P08) Central Heating Power.
The maximum Central Heating power can be adjusted by this parameter.
(P21) Low temperature region selection.
This parameter should be adjusted as 1 for ground heating or heating
systems operating with low temperature. 0 (zero) value is selected for
radiator systems to operate at high temperatures as standard.
(P24) Child Protection
This feature is disabled as default factory setting (0). Child Protection (key-
lock) is enabled when parameter is adjusted to 1. Keys are locked after 2
minutes following use when the feature is enabled. Key-lock is released
when the MODE button is hold until cycle is completed for getting o the
child protection
For other functions / parameters to customize your boiler, please refer to
the installation & service manual.
Deareation Function
The boiler has to be switched to OFF mode first. It is possible to activate
deaeration function pressing RESET and ”-“ for circle time.
“Air” will be displayed on the screen. Boiler will start the Deareation
function.
During this function pump and 3-way valve are activated/ deactivated in
order to have deaeration of the hydraulic plant.
This function ends pushing again RESET and ”-“ for circle time or at the end
of deaeration time: 12 minutes.
Fgure 6 Reset button and (–) button are pressed. 0019_00.W210419

12 warmhaus.co.uk
2.5. TROUBLESHOOTING
Error
Code Description of the Error Malfunction Probable Cause Solution(s)
E 01 Interventon of exhaust
Thermostat
Boler does not work, E01 error
code flashng on the screen
> Flue Sensor faulty 1) Reset & Restart boler
2) Call for authorsed servce
E 02 Low water pressure n the
system/system parameter
wrongly setted
Boler does not work, E02 error
code flashng on the screen
> Water pressure n the boler
too low
1) Fll the boler 1,2-1,5 bar accordng to manual
2) Check f the system pressure 1,2 - 1,5 bar from the LCD Screen
3) Reset & Restart boler
4) If problem persst Call for authorsed servce
E 03 Hgh water pressure n the
system
Boler does not work, E03 error
code flashng on the screen
> Hgh Water pressure n the
boler ( > 2,8 bar )
1) Frst check the fllng tap of the boler and make sure t s
closed.
2) Durng boler operaton, the safety valve may contnue to dran
water so make sure that t s connected to a dran lne.
3) If your plumbng lne has a dran cock; frst turn the boler o
and let the pressure drop to 1-1.5 bar, then swtch t on agan.
4) If the pressure ncrease occurs agan, call an authorsed
servce.
E 05 Central heatng FLOW
temperature sensor faulty
Boler does not work, E05 error
code flashng on the screen
> Central heatng FLOW
temperature sensor faulty
1) Reset & Restart the boler
2) Call for authorsed servce f problem perssts
E 06 No gnton Boler does not work, E06
error code flashng on the
screen
> Gas supply falure 1) Reset & Restart the boler
2) Check boler central heatng valves are open f they are closed
open all
3) Check all radator valves are open f they are closed. Mnmum
3 meters of radator must be open
4) RESET boler and check f problem s resolved.
5) Call for authorsed servce
E 07 Safety thermostat nterventon Boler does not work, E07 error
code flashng on the screen
> Lack of water n the system
> Pump blockage
> Pump falure
> Pump harness
> Installaton blockage
1) RESET boler check f problem s resolved
2) Check boler central heatng valves are open f they are closed
open all
3) Check all radator valves are open f they are closed. Mnmum
3 meters of radator must be open
4) RESET boler and check f problem s resolved
5) Call for authorsed servce
E 08 Flame crcut falure False flame sgnal from
combuston or electrode
> Condensate Syphon blocked
> Electronc board
1) Call for authorsed servce
E 09 No water crculaton
n the system
Boler does not work, E09
error code flashng on the
screen
> Lack of water n the system
> Pump blockage
> Pump falure
> Pump harness
> Installaton blockage
1) RESET boler at frst check f problem s resolved.
2) Check boler central heatng valves are open f they are closed
open all
3) Check all radator valves are open f they are closed. Mnmum
3 meters of radator must be open
4) RESET boler and check f problem s resolved
5) Call for authorsed servce
E 11 Gas valve modulator
dsconnected
Boler does not work, E11 error
code flashng on the screen
> Gas valve harness 1) Call for authorsed servce
2) Check gas valve between board and gas valve
E 13 Exhaust temperature probe
over-temperature alarm
Boler does not work, E13 error
code flashng on the screen
> Over temperature flue gas
outlet
value > 105 C°
1) Call for authorsed servce
E 14 Exhaust ( FLUE )
temperature probe fault
Boler does not work, E14 error
code flashng on the screen
> Central heatng FLUE
temperature
sensor faulty
1) Reset & Restart boler
2) Call for authorsed servce
E 15 Fan falure (feedback/supply) Boler does not work, E15 error
code flashng on the screen
> Fan harness 1) Reset & Restart boler
2) Call for authorsed servce
E 16 Central heatng temperature
RETURN sensor faulty
Boler does not work, E16 error
code flashng on the screen
> Central heatng RETURN
temperature sensor faulty
1) Reset & Restart boler
2) Call for authorsed servce
E 17 Temperature derence
between FLOW and LIMIT NTC
(Double Heatng Probe) faulty
FLOW and LIMIT sensor
(DOUBLE NTC) malfuncton
> FLOW and LIMIT Sensor (
double NTC ) faulty
1) Reset & Restart boler
2) Call for authorsed servce
E 19 Water flow meter nput
readng
Lack of domestc heatng
water on request
Wrong parameters settled on
TsP menu
1) Call for authorsed servce at frst
2) Only authorsed servce must adjust TsP Parameter P01=0 wth
defalut value
E 20 CH vertemperature,
Temperature Central Heatng >
TSP 81 value °C
Boler does not work, E81 error
code flashng on the screen
> Lack of water on the system
> Pump blockage
> Pump falure
> Pump harness
> Installaton blockage
1) RESET boler at frst check f problem s resolved.
2) Check boler central heatng valves are open f they are closed
open all
3) Check all radator valves are open f they are closed. Mnmum
3 meters of radator must be open
4) RESET boler and check f problem s resolve
5) Call for authorsed servce

13
warmhaus.co.uk
Error
Code Description of the Error Malfunction Probable Cause Solution(s)
E 21 Delta Temperature Central
Heatng flow and Return > TSP
82 value °C
Boler does not work, E21 error
code flashng on the screen
> Lack of water on the system
> Pump blockage
> Pump falure
> Pump harness
> Installaton blockage
1) RESET boler at frst check f problem removed
2) Check boler central heatng valves are open f they are closed
open all
3) Check all radator valves are open f they are closed. Mnmum
3 meters of radator must be open
4) RESET boler and check f problem resolved
5) Call for authorsed servce
E 28 Maxmum allowed consecutve
lock-out reset reached
Usable RESET number
reached.
Too many consecutve lock-out
falures (followed by reset) due
to other possble causes
1) Turn OFF the power of the applance. Reset wll be allowed
after turnng ON the power.
2) Check the root cause of Error to solve
3) If fault stll perssts call for authorsed servce
E 37 Low voltage anomaly Boler does not work, E37 error
code flashng on the screen
Low voltage < 165 VAC +/- 5%
on the supply network durng
normal operaton OR < 182
VAC +/- 5% durng Au-TO
calbraton mode
1) Call for Electrcal supply network provder
2) Error wll remove f supply voltage > 170 VAC +/- 5%
3) If ths falure s observed durng calbraton calbraton can not
be complete unless supply voltage > 188 VAC +/- 5%
E 40 Wrong network frequency
survey
Boler does not work, E40
error code flashng on the
screen
Wrong frequency of the
electrc supply network. Value
out of tolerance, 50 Hz +/- 5%
1) Call for Electrcal supply network provder
2) Error wll remove f supply frquency 50 Hz +/- 5%
E 41 Loss of flame more than 6
successve tmes
Boler does not work, E41 error
code flashng on the screen
> Too many domestc hot
water
request n short perod ( 1
mn )
> Low gas pressure
1) Call for authorsed servce at frst
E 42 Buttons anomaly Boler does not work, E42 error
code flashng on the screen
Wrong parameters settled on
TsP menu
1) Call For authorsed servce.
E 43 Opentherm Communcaton
error
Boler does not work, E43
error code flashng on the
screen after 1 mnute of
communcaton error
Opentherm lne dsconnected 1) Remove energy from boler and re energze E43 wll be
removed and boler & buttons wll get back to functonal
2) Replace the room unt batteres wth the fresh ones and reset
from room unt
3) Check cablng between boler and room unt and re connect
f any dsconnecton, f connecton set up succesfully then
connecton symbol wll be actvated on the screen
4) Call for authorsed servce to re connect openterm connecton
E 44 Cumulated ntermttent
gnton wthout reachng
burner gnton.
Boler does not work, E44
error code flashng on the
screen
> Intermttent contacts on
harness
> Hammer eect on water net
> Too many requests n short
tme
1) Reset & Restart boler
2) Call for authorsed servce
E 62 Calbraton request Boler does not work, E62 error
code flashng on the screen
> Calbraton not done
> Replacng board but not
servce
key from the old board (PCB)
> Servce key damaged or
dsconnected
> Updatng Software
1) Call For authorsed servce
E 72 Delta T heatng at gnton not
occurred
Boler does not work, E72 error
code flashng on the screen
> FLOW OR RETURN Sensor
not n
poston
1) Call for authorsed servce at frst
2) Check RETURN and FLOW sensor on poston.
E 74 Second CH temperature Probe
faulty
Boler does not work, E74 error
code flashng on the screen
> FLOW and LIMIT Sensor
(double NTC ) faulty
1) Reset & Restart boler
2) Call for authorsed servce.
E 77 Absolute current values
reached
Boler does not work, E77 error
code flashng on the screen
> Gas nlet pressure
> Agng or rust on the
electrode
> Recrculaton of exhaust gas
nto fresh ar
> Blockage n flue or wrong
flue
> Electrode poston
> Cablng dsconnectons
> Combuston calbraton
> Electronc board
> Gas valve falure
1) Call for authorsed servce
E 78 Max regulaton current value
reached
Boler does not work, E78 error
code flashng on the screen
> Gas nlet pressure
> Agng or rust on the
electrode
> Recrculaton of exhaust gas
nto fresh ar
> Blockage n flue or wrong
flue
> Electrode poston
> Cablng dsconnectons
> Combuston calbraton
> Electronc board
> Gas valve falure
1) Call for authorsed servce

14 warmhaus.co.uk
Error
Code Description of the Error Malfunction Probable Cause Solution(s)
E 79 Mn regulaton current value
reached
Boler does not work, E79 error
code flashng on the screen
> Gas nlet pressure
> Agng or rust on the
electrode
> Recrculaton on fluegas path
> Blockage n flue or wrong
flue
> Electrode poston
> Cablng dsconnectons
> Combuston calbraton
> Electronc board
> Gas valve falure
1) Call for authorsed servce
E 80 Problem on electronc gas
valve drver
Boler does not work, E80
error code flashng on the
screen
> Electronc board
> Gas valve falure
1) Call for authorsed servce
E 81 Lock-out for combuston
problem at startng (1)
Boler does not work, E81 error
code flashng on the screen
> Strong flue blockage
> Combuston problem
> Wrong flue
> Gas nlet pressure
> Agng or rust on the
electrode
> Recrculaton of exhaust gas
nto fresh ar
> Electrode poston
> Combuston calbraton
1) Call for authorsed servce
E 84 Capacty reducton for
detected (supposed) low gas
nlet pressure
Boler operates at lmted
capacty,
E84 error code flashng on the
screen
> Gas nlet pressure
> Combuston problem
1) If there s strong wnd wat untl the wnd stop then RESET the
boler
2) IF problem persst Call for authorsed servce
E 87 Problem on electronc gas
valve crcut
Boler does not work, E87 error
code flashng on the screen
> Cablng dsconnectons
> Gas valve falure
1) Call for authorsed servce
E 88 Fault of electronc gas valve
managng crcut
Boler does not work, E88 error
code flashng on the screen
> Cablng dsconnectons
> Gas valve falure
1) Call for authorsed servce
E 89 Problem on combuston
feedback sgnal
Boler does not work, E89 error
code flashng on the screen
> Agng or rust on the
electrode
> Recrculaton of exhaust gas
nto fresh ar
> Blockage n flue or wrong
flue
> Electrode poston
> Cablng dsconnectons
> Combuston calbraton
> Electronc board
> Gas valve falure
1) Call for authorsed servce
E 90 Unable to regulate
combuston
Boler does not work, E90
error code flashng on the
screen
> Agng or rust on the
electrode
> Recrculaton of exhaust gas
nto fresh ar
> Blockage n flue or wrong
flue
> Electrode poston
> Cablng dsconnectons
> Combuston calbraton
> Electronc board
> Gas valve falure
1) Call for authorsed servce
E 92 Ar compensaton actve Boler does not work, E92 error
code flashng on the screen
> Possble wnd precence
> Agng or rust on the
electrode
> Recrculaton of exhaust gas
nto fresh ar
> Blockage n flue or wrong
flue
> Electrode poston
> Combuston calbraton
> Mn power adjustment
1) Call for authorsed servce
E 93 Unable to regulate
combuston (temporarly)
Boler does not work, E93 error
code flashng on the screen
> Agng or rust on the
electrode
> Recrculaton of exhaust gas
nto fresh ar
> Blockage n flue or wrong
flue
> Electrode poston
> Combuston calbraton
> Gas valve falure
> Electronc board
1) Call for authorsed servce

15
warmhaus.co.uk
Error
Code Description of the Error Malfunction Probable Cause Solution(s)
E 94 Possble low gas pressure or
exhaust recrculaton
Boler does not work, E94 error
code flashng on the screen
> Gas nlet pressure LOW
> Recrculaton of exhaust gas
nto fresh ar
> Blockage n flue or wrong
flue
> Agng or rust on the
electrode
> Electrode poston
> Combuston calbraton
> Gas valve falure
> Electronc board
1) Call for authorsed servce
E 95 Intermttent combuston value Boler does not work, E95 error
code flashng on the screen
> Harness on electrode and
earth
> Agng or rust on the
electrode
> Electrode poston
> Combuston calbraton
1) Call for authorsed servce
E 96 Flue or ar sucton way
blockage
Boler does not work, E96 error
code flashng on the screen
> Blockage n flue
> Blockage n ar sucton path
1) Call for authorsed servce
E 98 SW error, board start-up error
fault
Boler does not work, E98 error
code flashng on the screen
> Boler software problem 1) Call for authorsed servce
E 99 Generc fault Boler does not work, E99 error
code flashng on the screen
> Boler electronc hardware
problem
1) Reset & Restart boler
2) Call for authorsed servce
(1) Call the Authorised Service if failure continues.
(2) 81 numbered failure corresponds any blocking in the exhaust gas pipe. In such case, you should consult the authorised service technician before re-starting the boiler.

16 warmhaus.co.uk
2.6. RECOMMENDATIONS FOR ECONOMICAL USE OF
Your is adjusted at ECO mode for economic use, we recommend not to
change it
Correct Capacity Selection
Heat loss calculation of the boiler location should be made correctly
and boiler capacity should be selected accordingly. Devices not having
adequate capacity shall give late responses to heating requests, devices
with higher capacity may cause discomfort and more fuel consumption as
they turn ON and OFF more frequently. Therefore, boiler capacities should
be selected according to the place used.
Insulation
Insulation of your building is the most important item reducing the heat
loss and gas consumption. However, as your has the highest thickness
insulation of its class, heat loss is minimized.
Radiators
Ensure balancing the rest pump head of the appliance by making reduction
adjustments from radiator valves. Placing furnitures in front of radiators
prevents air circulation and causes discomfort and more fuel consumption.
Reducing radiator valves of rooms not used for a long period or if
thermostatic radiator valve is used, bringing to the lowest position then,
closing room doors will provide saving.
Domestic Hot Water
Always adjust the domestic hot water temperature as (38~42 °C) for
a considerable power saving. In addition, high domestic hot water
temperatures cause strong calcification and that negatively aects
operation of the device (for instance, longer heating periods, less flow rate).
Thermostatic Radiator Valves
You can both acquire savings and comfort by balancing the heat distribution
among the house by using Thermostatic Radiator Valves.
Room Thermostats
Your boiler will operate more economically as you will have the chance
to adjust requested room temperature according to comfort via room
thermostats. Thus, you can adjust temperature of your room as you wish,
and also you can acquire approximately 6% power saving with every
degree of temperature decrease.
Ventilation
Do not leave windows slightly open for ventilating room/rooms. In
such case, continuous heat loss will occur and not having any certain
improvement in the room air.
Fully opening windows for a short period provides a better result. Bring
thermostatic radiator valves to lowest position when ventilating rooms.
Cleaning And Maintenance
Attenton: to preserve the boiler’s integrity and keep the safety features,
performance and reliability, you must at least execute maintenance
operations on a yearly basis in compliance with national, regional, or local
standards in force.
We recommend a yearly cleaning and maintenance contract with an
authorised local firm.
2.7. ISSUES REQUIRED TO BE TAKEN INTO
CONSIDERATION FOR WARRANTY CONDITIONS
Under below given conditions, warrnaty of the product will be void :
1. Damages and failures occurring in devices which are not commissioned
Authorised Services,
2. Damages and failures arising from use of the product contrary to items
given in User’s Manual and using out of its intended purpose.
3. Damages and failures arising from wrong type selection,
4. Damages and failures arising from maintenance and repairs performed
by persons other than Authorised Services,
5. Damages and failures occurring due to transportation, unloading,
loading, storing, external physical (Crushing, scratches, fractures) and
chemical factors following delivery of the Product,
6. Damages and failures arising from fire and lightning,
7. Damages and failures arising from false fuel use and fuel characteristics,
8. Low or excessive voltage, unearthed socket usage;
9. Damages and failures arising from faulty electricity installations,
10.Damages and failures arising from failing to perform timely annual
maintenance and cleaning,
11.Damages and failures arising from frost/icing or occurring due to using
in the outdoor places (open balcony, etc.).
12.Damages and failures arising from using water out of the water values
defined in device user’s guide,

17
warmhaus.co.uk
Product FICHE & ErP Data
ErP Data Manufacturer:
Warmhaus
Type-model / Techncal data
Ewa bolers
Mark (s) of conformty
granted
Ewa-2525 C 25 kW Ewa-2530 C 30 kW
ErP & Product Fche for Warmhaus bolers has been tested and reported on SZU Test / BRNO gven bellow;
PRODUCT FICHE (accordng to EU regulaton No 811/2013 and 814/2013)
Ewa-2525C Ewa-2525C Ewa-2530C Ewa-2530C
Space heatng - Temperature applcaton Hgh / Medum / Low Hgh / Medum / Low Hgh / Medum / Low Hgh / Medum / Low
Water heatng - Declared load profle LXL LXL
Seasonal space heatng energy ecency class A A A A
Water heatng energy ecency class A A A A
Rated heat output (Prated or Psup) kW 24 24 24 24
Space heatng - annual energy consumpton QHE GJ 42.14 42.14 42.14 42.14
Water heatng - Annual energy consumpton
kWh (*) 26 37 26 37
GJ (**) 11 18 11 18
Seasonal space heatng energy ecency %92 92 92 92
Water heatng energy ecency %81 84 81 84
Sound power level LWA ndoors dB 52 52 52 52
Opton to only operate durng low demand perods - — — - -
Specfc precautons for assembly, nstallaton
and mantenance
Before any assembly, nstallaton or mantenance the user and nstallaton manual has to be
read attentvely and to be followed
All the data that s ncluded n the product nformaton was determned by applyng the spesfcatons of the relevant European drectves. Derences to product nformaton
lsted elsewhere may result n derent test condtons. Only the data that s contaned n ths product nformaton s applcable and vald.
(*) Electrcty
(**) Fuel
HANDING OVER
After completing the installation and commissioning of the system the installer should hand over to the householder by the following actions:
1. Make the householder aware that the user instructions are located in the pocket in the drop down door and explain his/her responsibilities under the relevant
national regulations.
2. Explain and demonstrate the lighting and shutting down procedures.
3. The operation of the boiler and the use and adjustment of all system controls should be fully explained to the householder, to ensure the greatest possible
fuel economy consistent with the household requirements of both heating and hot water consumption. Advise the User of the precautions necessary to
prevent damage to the system and to the building, in the event of the system remaining inoperative during frosty conditions.
4. Explain the function and the use of the boiler heating and domestic hot water controls.
Explain that due to system variations and seasonal temperature fluctuations DHW flow rates/temperature rise will vary, requiring adjustment at the draw
o tap. It is therefore necessary to draw the users attention to the section in the Users Instructions titled “Control of Water Temperature” and the following
statement: “Additionally, the temperature can be controlled by the user via the draw-o tap: the lower the rate the higher the temperature, and vice versa”.

18 warmhaus.co.uk
ErP DATA (According to EU regulation No 813/2013 and 814/2013)
Ewa-2525C Ewa-2525C Ewa-2530C Ewa-2530C
2525C 2525C 2530C 2530C
Water heatng - Declared load profle LXL LXL
Reated Heat Output Prated kW 24 24 24 24
Useful heat output at rated heat output and hgh
temperature regme (2) P4kW 23.7 23.7 23.7 23.7
Useful heat output at 30% of rated heat output and low
temperature regme (1) P1kW 4.16 4.16 4.16 4.16
Seasonal Space Heatng Energy Ecency ηs % 92 92 92 92
Useful ecency at rated heat output and hgh temperature
regme(2) η4%87.57 87. 57 87.57 87.57
Useful ecency at 30% of rated heat output and low
temperature regme(1) η1%97.48 97.48 97.4 8 97.48
Auxlary Electrcty Consumpton
Full load elmax kW 0.43 0.43 0.43 0.43
Part load elmin kW 0.11 0.11 0.11 0.11
Standby mode PSB kW 0.005 0.005 0.005 0.005
Other Items
Standby heat loss PStby kW 0.057 0.057 0.057 0.057
Ignton burner power consumpton Pgn kW 0.000 0.000 0.000 0.000
Space heatng - annual energy consumpton QHE GJ 42.14 42.14 42.14 42.14
Sound power level, ndoors LWA dB 52 52 52 52
Emssons of ntrogen oxdes NOxmg/kWh 20 20 20 20
Domestc Hot Water Parameters
Declared Load Profle LXL LXL
Daly electrcty consumpton Qelec kWh 0.117 0.169 0.117 0.169
Annual electrcty consumpton* AEC kWh 26 37 26 37
Water Heatng Energy Ecency hwh %81 84 81 84
Daly fuel consumpton Qfuel kWh 14.809 23.152 14.809 23.152
Annual fuel consumpton AFC GJ 11 18 11 18
Condensng boler -Yes Yes Yes Yes
Low temperature boler -Yes Yes Yes Yes
Comb Bolernaton boler -Yes Yes Yes Yes
B1 Boler -No No No No
Room boler wth comb bolerned heat and power -No No No No
Auxlary boler -No No No No
Brand Name Warmhaus
Manufacturer adress Warmhaus Isıtma ve Sogutma Sstemler San. Tc. A.Ş.
Mnarelçavuş OSB Mahalles Selv Cad. No:3 Nlufer/Bursa/Turkey
Warnngs
All spesfc precautons for assembly, nstallaton and mantanance are descrbed n the operatng and nstallaton
manual. Read and follow the operatng and nstallaton manual.
Read and follow the operatng and nstallaton manual regardng assembly, nstallaton, mantenance, removal,
recyclng and/or dsposal.
* for avarage clmatc condtons
(1) Low temperature means for condensng bolers 30 oC, for low temperature bolers 37 oC and for other heaters 50 oC return temperature (at heater nlet).
(2) Hgh temperature regme means 60 oC return temperature at heater nlet and 80 oC feed temperature at heater outlet.
As ths s the property of Warmhaus Isıtma ve Sogutma Sstemler San. Tc. A.Ş. It must not be passed on to any person not authorzed by Warmhaus Isıtma ve Sogutma Sstemler
San. Tc. A.Ş or be coped or otherwse utlzed by anybody wthout expressed wrtten permsson.
All descriptions and illustrations provided in this document have been carefully prepared but we reserve the right to make changes and improvements
in our products which may aect the accuracy of the information contained in this leaflet. All goods are sold subject to our standard Conditions of Sale
which are available on request.

19
warmhaus.co.uk

Ewa 2525C & Ewa 2530C Comb User Manual-(UK) Code: 15011606000112 Revson Date: 07.2021
EWA 2525C
EWA 2530C
FOR ANY TECHNICAL QUERIES PLEASE RING THE
WARMHAUS CONSUMER / INSTALLER / TECHNICAL HELPLINE:
0207 1646233
Enquiries about assets
If you have any questions about
our power cables, gas lines, or
other assets, please contact
Cadent's Plant Protection
team. Cadent provide first-line
support for our assets.
Gas Emergencies
If you smell gas or have
accidentally hit the NTS pipeline
please call us urgently:
0800 111 999
Electricity Emergencies
If you spot a potential hazard on
or near an overhead electricity line
please call us urgently:
0800 40 40 90
CONDENSING COMBI BOILERS USER MANUAL
NOTES FOR THE USER & INSTALLER
· 0800 688 588
· plantprot[email protected]om
· https://www.nationalgrid.com/uk/contact-us
NATIONAL GRID UK EMERGENCY NUMBERS