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3.4. RECOMMENDATIONS FOR ECONOMICAL USE OF 

COMBI

Your combi is adjusted at ECO mode for economic use, we recommend not 
to change.

Correct Capacity Selection

Heat loss calculation of the combi location should be made correctly and 
combi capacity should comply with this calculation. 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 
more frequently opened and closed. Therefore, combi 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 combi has the highest thickness 
insulation of its class, heat loss is minimized.

Radiators

Ensure balancing our pressure distribution of your radiator installation within 
the house 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). Adjustment 
of temperature adjuster as low ensures a considerable power saving. In 
addition, high domestic hot water temperatures cause strong calcification 
and that negatively affects 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 combi will operate more economically as you will have the chance to 
adjust requested room temperature according to comfort and economy 
timings 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
Attention:

 to preserve the boiler's integrity and keep the safety features, 

performance and reliability, which distinguish it, unchanged over time, you 
must at least execute maintenance operations on a yearly basis in compliance 
with what is stated in the relative point at “annual check and maintenance of 
the appliance”, in compliance with national, regional, or local standards in 
force. 

We recommend stipulating a yearly cleaning and maintenance contract with 
an authorised local firm.

3.5.  ISSUES REQUIRED TO BE TAKEN INTO 

CONSIDERATION FOR WARRANTY CONDITIONS

This warranty given by WARMHAUS does not cover elimination of failures 
arising from abnormal use of the product and also out of the warranty scope 
for below given situations

1. 

Damages and failures occurring in devices which are not first started by 
Warmhaus Authorized 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 our Authorized 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

11.

 

And cleaning, defined periodical maintenance operations by our 
Authorized Services,

12.

Damages and failures those may occur in the device or usage area due to 

other products and accessories used in a system with the device subject 
to the Warranty,

13.

Damages and failures arising from frost/icing or occurring due to using in 

the outdoor places (open balcony, etc.).

14.

Altering the Registry Label and Warranty Certificate,

15.

Damages and failures arising from using water out of the water values 

defined in device user's guide,

Elimination of above mentioned failures shall be performed against payment.

Our distinguished customer,
we believe the importance of providing good products to you as well as 
rendering good services.

Recommendations and Data to be Followed:
1.

  When first start of your combi is done, please keep the technical service 

document given by the Aythorized Service and a copy of device invoice 
and the Warranty Document approved by your Authorized Dealer.

2.

 Use your product according to principles of installation and operation 

guide.

3.

 Keep the "SERVICE DOCUMENT" if received from your service technician 

following the service taken. The Service Document will be beneficial for 
you in any problems those may occur in your device in the future.

Summary of Contents for EWA 28

Page 1: ...CONDENSING COMBI BOILERS INSTALLATION USER MANUAL EWA24 EWA28 EWA33...

Page 2: ...EWA 24 EWA 28 EWA 33...

Page 3: ...mptying Radiator Installation 13 2 3 3 Circulation Pump 15 2 3 4 Controls for Initial Operation of Combi 15 2 3 5 Parts Comprising the Combi 16 2 4 COMBI FLUE CONNECTIONS 16 2 4 1 Exhaust Gas Flue Pip...

Page 4: ...and instructions provided by the manufacturer under any circumstances during installation use or maintenance operations and device warranty shall also be void Only the authorized Warmhaus Service is...

Page 5: ...YES II 2E 3P Natural Gas 20 mbar 25 mbar G20 Available Available Not Available BE FR YES II 2H3B P Natural Gas 20 mbar G20 Available Available Not Available AT CH CY CZ DK EE FI GR IT LT NO RO SE SI...

Page 6: ...es operating with natural gas and your gas meter Immediately evacuate the place with gas odour Natural Gas Emergency Line from your neighbour or another suitable place Do not make any intervention on...

Page 7: ...Figure 2 User s Guide Figure 5 Exhaust gas flue set 471 1000 GAS G3 4 G3 4 G3 4 80 mm 65 mm 65 mm 64 mm 725 mm 592 mm 422 mm G1 2 G1 2 75 mm 73 mm 110 m m 114 mm OPTIONAL Ewa Priwa ERP Priwa ERP Plus...

Page 8: ...r semi full brick wall according to installation scheme and with connection screws and not to be used for other purposes In case of using different materials for installation combi shall be out of the...

Page 9: ...2 2 7 In Case of Using LPG Tank LPG use is recommended for heat requirements over 24 kW New LPG stock tanks may contain settled gas residues nitrogen however that pauperises the mixture assigned to t...

Page 10: ...ceptable to use gas and water connection pipes for earthing WARMHAUS A cannot be held as responsible for any damages and losses on individuals or commodities arising from failing to provide earth conn...

Page 11: ...ensor is activated when connected as independent from the used room thermostat typology and functions as common with room thermostats The relation between installation input temperature and exterior w...

Page 12: ...0 600021 WT RF03 Large Screen Modulated Weekly Program Scheduled Wireless room thermostat Product code 153 11 660 600022 150 cm Min 30 cm Room thermostat shall be mounted 1 25 to 1 5 m above the groun...

Page 13: ...d in the hot tap water Hydrophore should be used if required Prior to filling the radiator installation it must be flushed and all wastes must be cleaned Warning In order to prevent invalidity of devi...

Page 14: ...mum 3 storey buildings Drainage and Ventilation Pipe Min 19 mm Water Air proof insulation Figure 2 26 Connection of condensate Drainage Pipe to External Soil Vent Stack Connection of Condensate Draina...

Page 15: ...ppointment request Gas opening approval certificate should be taken from the local gas company for your gas line Combi electricity connection should be made via 2 or 3 Amps fuse Figure 22 Ewa 28 Ewa 3...

Page 16: ...on of hermetic combi should be original Warmhaus flue sets and they should be used by considering measurements and restrictions given in installation instructions In case of using exhaust gas pipe and...

Page 17: ...ontent 10 00 tolerance 0 5 0 5 maximum allowable draught and maximum allowable pressure difference between combustion air inlet and flue gas outlet including wind pressures 120 Pa characteristics and...

Page 18: ...t are given technical table c combustion product mass flow rate at minimum heat input allowed by the controls are given technical table d G20 CO2 or O2 content of the combustion products at nominal op...

Page 19: ...H C R A I J K I L S B T U Likely flue positions requiring a flue terminal guard Figure 32 Environmental locations of flue Terminal Position with Minimum Distance mm A1 Directly below an opening air br...

Page 20: ...5 mm when compared with the external pipe For security purposes combi suction discharge flue should not blocked even temporarily 1 90 bend 2 Sealing gasket 3 Sealing gasket 4 Centering wire 5 Exterio...

Page 21: ...sed for 80 intake and exhaust pipes is 30 metres regardless from whether they are used for intake or exhaust Figure 41 Vertical flue set installation application Figure 42 Hermetic flue type installat...

Page 22: ...rill fitted The air pipe can be situated at the side or beneath the flue pipe to a minimum dimension of 140 mm see Table 1 It must not be sited above the flue pipe The flue and air pipes must extend b...

Page 23: ...apter L 1533 153 11 660 600013 60 100 Condensed Flue Extension L 500 mm 153 11 660 600014 60 100 Condensed Flue Extension L 1000 mm 153 11 660 600015 60 100 Condensed Flue Extension L 2000 mm 153 11 6...

Page 24: ...m 153 11 660 600092 80 Condensed Twin Flue Extension Pipe L 1000 mm 153 11 660 600093 80 Condensed Twin Flue Extension Pipe L 2000 mm 153 11 660 600094 80 Twin Flue Bend 90 153 11 660 600095 80 Twin F...

Page 25: ...minals For GB recommendations are given in BS 5440 Pt 1 For IE recommendations are given in the current edition of I S 813 Domestic Gas Installations 2 If the terminal discharges onto a pathway or pas...

Page 26: ...ut is not blocked If a room thermostat or control device is connected ensure that it is at ON position If you will shut off the combi for a long period perform below written operations Discharge the r...

Page 27: ...he combi and eliminating the failure in case of combi failure MODE Winter Summer OFF mode is used for position adjustment Operating positions and related notifications POSITION EXPLANATIONS CLOSED or...

Page 28: ...re adjustment buttons see Figure 39 between 25 80 C screen lights when buttons are pressed and C symbol flashes besides the radiator temperature value If you have a ground heating system as our Author...

Page 29: ...ght turns off 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 heatin...

Page 30: ...ment of installation place Thus the combi automatically operates with variable gas flow rates depending on heat load of installation between the minimum and maximum power P21 Lowe temperature region s...

Page 31: ...4 RESET boiler and check if problem removed 5 Call for authorised service at first E 07 Safety thermostat intervention Boiler does not work E07 error code flashing on the screen Lack of water on the...

Page 32: ...removed 5 Call for authorised service at first E 28 Maximum allowed consecutive lock out reset reached Usable RESET number reached Too many consecutive lock out failures followed by reset due to other...

Page 33: ...ssure Aging or rust on the electrode Recirculation on fluegas path Blokage on flue or wrong flue Electrode position Cabeling disconnections Combustion calibration Electronic board Gas valve failiure 1...

Page 34: ...lve failiure Electronic board 1 Call for authorised service at first 2 Check wrong flue OR flue gas blockage 3 Check recirculation flue gas leak from flue gas path to fresh air side check flue gas sea...

Page 35: ...least execute maintenance operations on a yearly basis in compliance with what is stated in the relative point at annual check and maintenance of the appliance in compliance with national regional or...

Page 36: ...400 2400 2400 Pump Energy Efficiency Index EEI 0 20 0 20 0 20 Domestic Hot Water Circuit Maximum DHW Heat Input kW 25 8 29 7 34 2 Minimum DHW Heat Input kW 3 5 3 75 4 35 Max Domestic Hot Water flow ra...

Page 37: ...on was determined by applying the spesifications of the relevant European directives Differences to product information listed elsewhere may result in different test conditions Only the data that is c...

Page 38: ...ual electricity consumption AEC kWh 26 37 34 39 42 Water Heating Energy Efficiency hwh 81 84 83 84 82 Daily fuel consumption Qfuel kWh 14 809 23 152 23 615 23 078 29 317 Annual fuel consumption AFC GJ...

Page 39: ...been carefully prepared but we reserve the right to make changes and improvements in our products which may affect the accuracy of the information contained in this leaflet All goods are sold subject...

Page 40: ...Ewa Installation User Manual code 150 11 606 000075 Revision Date R00 05 2019 EWA24 EWA28 EWA33 CONDENSING COMBI BOILERS INSTALLATION USER MANUAL...

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