EN 13203-4:2016

SLOVENSKI STANDARD
01-april-2017
Plinske gospodinjske naprave za pripravo tople sanitarne vode - 4. del:
Ocenjevanje porabe energije plinskih naprav za soproizvodnjo tople vode in
elektrike (mCHP)
Gas-fired domestic appliances producing hot water - Part 4: Assessment of energy
consumption of gas combined heat and power appliances (mCHP) producing hot water
and electricity
Gasbeheizte Geräte für die sanitäre Warmwasserbereitung für den Hausgebrauch - Teil
4: Bewertung des Energieverbrauchs von Gasgeräten mit Kraft-Wärme-Kopplung (Mikro-
KWK) zur Warmwasserbereitung und Stromerzeugung
Appareils domestiques produisant de l'eau chaude sanitaire utilisant les combustibles
gazeux - Partie 4: Évaluation de la consommation énergétique des appareils à gaz de
production combinée de chaleur et d'électricité (mCHP) produisant de l'eau chaude et de
l'électricité
Ta slovenski standard je istoveten z: EN 13203-4:2016
ICS:
91.140.65 Oprema za ogrevanje vode Water heating equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 13203-4
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2016
EUROPÄISCHE NORM
ICS 91.140.65
English Version
Gas-fired domestic appliances producing hot water - Part
4: Assessment of energy consumption of gas combined
heat and power appliances (mCHP) producing hot water
and electricity
Appareils domestiques produisant de l'eau chaude Gasbeheizte Geräte für die sanitäre
sanitaire utilisant les combustibles gazeux - Partie 4: Warmwasserbereitung für den Hausgebrauch - Teil 4:
Évaluation de la consommation énergétique des Bewertung des Energieverbrauchs von Gasgeräten mit
appareils à gaz de production combinée de chaleur et Kraft-Wärme-Kopplung (Mikro-KWK) zur
d'électricité (mCHP) produisant de l'eau chaude et de Warmwasserbereitung und Stromerzeugung
l'électricité
This European Standard was approved by CEN on 6 August 2016.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13203-4:2016 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 General test conditions . 8
4.1 Reference conditions . 8
4.2 Measurement uncertainties . 8
4.3 Test conditions . 9
4.3.1 General . 9
4.3.2 Test room . 9
4.3.3 Water supply . 9
4.3.4 Steady-state . 9
4.3.5 Initial adjustment of the appliance . 9
4.3.6 Electrical supply . 10
4.3.7 Delivered electrical energy . 10
5 Determination of the energy consumption and electrical energy generation of the
appliance . 10
5.1 General . 10
5.2 Tapping cycles . 10
Table 1 – Load profile S . 12
Table 2 – Load profile M . 13
Table 3 – Load profile L . 14
Table 4 – Load profile XL . 15
Table 5 – Load profile XXL . 16
Table 6 – Load profile 3XL . 17
Table 7 – Load profile 4XL . 18
5.3 Measurement of the energy recovered by the useful water . 19
5.4 Calculation of gas energy . 19
5.4.1 Calculation of the daily gas energy consumption in summer mode . 19
5.4.2 Calculation of daily gas energy consumption in winter mode . 20
5.4.3 Daily gas energy consumption seasonally weighted . 20
5.5 Calculation of electrical energy . 21
5.5.1 Calculation of the delivered electrical energy . 21
Figure 1 – Electrical measurements – Test points . 21
5.5.2 Calculation of the produced electrical energy . 23
5.5.3 Calculation of electrical auxiliary energy . 24
5.6 Measurement of energy consumption and production in standby mode . 24
5.6.1 General . 24
5.6.2 Calculation of daily gas energy consumption in standby mode . 24
5.6.3 Calculation of daily auxiliary energy in standby mode . 25
5.7 Measurement of auxiliaries consumption in off mode . 26
6 Determination of the wasted water . 26
7 Eco design Related Product Data . 27
7.1 Water heating energy efficiency. 27
7.2 Annual fuel consumption (AFC) . 28
7.3 Annual electricity delivery (AED) . 28
Annex A (informative) Examples of test conditions . 30
A.1 Diagrams of test conditions . 30
Figure A.1 —Initial adjustment of the appliance with storage tank maintained in
temperature. 30
Figure A.2 —Initial adjustment of the appliance without storage tank maintained in
temperature. 31
Figure A.3 – Tapping cycle – Test cycle for measurement of the energy consumption of the
appliance with storage tank maintained in temperature . 32
Figure A.4 – Standby mode with control cycles . 33
Annex B (informative) Test rig and measurement devices . 34
B.1 General . 34
Figure B.1 – Example of test rig . 34
B.2 Pressure measurement . 35
Figure B.2 — Example of pressure measurement device . 35
B.3 Temperature measurement . 35
Figure B.3 — Example of temperature measurement device . 36
Figure B.4 — Example of position of thermocouples - Method of surfaces . 37
Figure B.5 — Useful and delivered flow rates and temperatures . 38
Annex C (normative) Test points . 39
Figure C.1 – Thermal performances for mCHP systems with combined storage tank for
central heating and domestic hot water – Test points . 39
Figure C.2 – Thermal performances for mCHP systems with storage tank for domestic hot
water only – Test points . 40
Annex ZA (informative) Relationship between this European Standard and the
requirements of Commission Regulation (EC) n° 814/2013 . 41
Table ZA.1 — Correspondence between this European Standard and Commission
Regulation (EC) n° 814/2013 . 41
Annex ZB (informative) Relationship between this European Standard and the
requirements of Commission Regulation n° 812/2013 . 42
Table ZB.1 — Correspondence between this European Standard and Commission
Regulation (EC) n° 812/2013 . 42
Annex ZC (informative) Relationship between this European Standard and the
requirements of Commission Regulation (EU) n° 813/2013 . 43
Table ZC.1 — Correspondence between this European Standard and Commission
Regulation (EC) n° 813/2013 . 43
Annex ZD (informative) Relationship between this European Standard and the
requirements of Commission Delegated Regulation (EU) n° 811/2013 . 44
Table ZD.1 — Correspondence between this European Standard and Commission
Regulation (EC) n° 811/2013 . 44
Bibliography . 45
European foreword
This document (EN 13203-4:2016) has been prepared by Technical Committee CEN/TC 109 “Central
heating boilers using gaseous fuels”, the secretariat of which is held by NEN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by April 2017, and conflicting national standards shall be
withdrawn at the latest by April 2017.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with EU Directive(s), see informative Annex ZA, B, C or D, which is an integral part of
this document.
The safety operation of the boiler is not covered by this standard. Safety is proved by means of the
essential safety requirements of the Gas Appliances Directive 2009/142/EC. This way be achieved by
compliance with the appropriate existing harmonized standards.
NOTE Useful standards are EN 26, EN 89, EN 15502–1, EN 15502–2–1, EN 15502–2–2 and EN 50465:2015.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
1 Scope
This European Standard is applicable to gas-fired mCHP appliances producing domestic hot water and
electricity. The electricity is generated in a process linked to the production of useful heat.
It applies to a mCHP appliances marketed as single unit or as a package fully specified by a
manufacturer that have:
— a gas heat input not exceeding 70 kW;
— an electrical output not exceeding 50 kW and
— a hot water storage capacity not exceeding 500 l.
EN 13203-1 sets out in qualitative and quantitative terms the performance in delivery of domestic hot
water for a variety of uses. It also gives a system for presenting the information to the user.
The present document sets out a method for assessing the energy performance of gas fired mCHP
appliances. It defines a number of daily tapping cycles for each domestic hot water use, kitchen, shower,
bath and a combination of these, together with corresponding test procedures, enabling the energy
performances of different gas-fired appliances to be compared and matched to the needs of the user.
When the mCHP generator does not supply domestic hot water in the summer period, the present
standard is not applicable. EN 13203-2 is used for performance assessment of these generators.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
EN 13203-1, Gas fired domestic appliances producing hot water - Part 1: Assessment of performance of
hot water deliveries
EN 13203-2, Gas-fired domestic appliances producing hot water - Part 2: Assessment of energy
consumption
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
storage tank
reservoir for domestic hot water and or central heating water
3.2
nominal domestic hot water heat input (Q )
nw
value of the heat input stated in the appliance instructions for the production of domestic hot water
Note 1 to entry: Q is expressed in kilowatt (kW)
nw
3.3
summer mode
conditions during which the appliance supplies energy only for the production of domestic hot water
3.4
winter mode
conditions during which the combination mCHP appliance supplies energy for the production of
domestic hot water and/or space heating
3.5
domestic water test temperature
temperature of the delivered water at which the tests are conducted
3.6
control cycle
time cycle for keeping components and/or the storage tank (if any) of the domestic hot water circuit at
predetermined temperature level, consisting of an «ON» duration time during which the heating of the
domestic hot water (by gas energy and/or auxiliary energy) is operating, and an «OFF» duration time
during which no heating occurs
3.7
useful water
quantity of water delivered at the tap for which the temperature increase is in accordance with the
requirement fixed for each individual delivery of the tapping cycles
3.8
wasted water
quantity of water delivered at the tap for which the temperature increase is not in accordance with the
requirement fixed for each individual delivery of the tapping cycles
3.9
standby mode
operating state in which the appliance can provide domestic hot water at any time
Note 1 to entry: In the case of an appliance with a control cycle for keeping components and/or the storage tank
(if any) of the domestic hot water circuit at predetermined temperature level no tapping is made.
3.10
off mode
state of an appliance, selected by the user, in which domestic hot water cannot be provided
3.11
mCHP appliance
appliance which is placed on the market either as a complete package or specified as a complete
package to deliver safely and effectively the heating, electrical power and the domestic hot water
service claimed, comprising as relevant:
— primary heat and power generator;
— supplementary heat generator;
— flue ducts;
— thermal store
3.12
mCHP generator
preferential heat and power generator
3.13
supplementary heat generator
non-preferential heat source providing peak load
3.14
power conditioning and control system
equipment used to change electrical voltage level and waveform, or otherwise alter or regulate the
electrical output of the primary heat and power generator to make it suitable and safe for export to
other components within or outside the appliance including controls used to operate the primary heat
and power generator such a gas valve, safety controls and internal cooling pumps
3.15
electric auxiliary energy (E )
Auxiliary
electric energy consumed by the mCHP appliance components associated with the supplementary heat
generator, thermal management and controls (e.g. pump, fan, valves, control unit)
Note 1 to entry: E is expressed in kWh
Auxiliary
3.16
produced electrical energy (E )
CHP
electrical energy produced by the mCHP generator
Note 1 to entry: E is expressed in kWh
CHP
3.17
delivered electrical energy (E )
delivered
electrical energy delivered by the mCHP appliance to the grid
Note 1 to entry: E is expressed in kWh
delivered
3.18
useful water flow rate
flow rate of water delivered at the tap for which the temperature increase is in accordance with the
requirement fixed for each individual delivery of the tapping cycles
3.19
useful water temperature
water temperature, expressed in degrees Celsius, delivered at the tap
3.20
appliance flow rate
flow rate delivered by the appliance before the mixing device, if applicable
3.21
appliance water temperature (T )
d
water temperature, expressed in degrees Celsius, delivered by the appliance before the mixing device
4 General test conditions
4.1 Reference conditions
Unless otherwise stated, the general test conditions shall be as follows:
— cold water temperature: 10°C
— maximum average variation over the test period: ± 2 K
— cold water pressure: (2 ± 0,1) bar;
— ambient air temperature: 20°C
— maximum average variation over the test period ± 1 K
— maximum variation during the tests ± 2 K
— electrical supply voltage:
— (230 ± 2) V single phase;
— (410 ± 4) V three phase.
4.2 Measurement uncertainties
Except where otherwise stated in the clauses describing the tests, the uncertainties of measurements
carried out shall not be greater than the maximum uncertainties indicated below.
The following deviations take into account the various sources of uncertainty: contribution from the
instrument, repeatability, calibration, ambient conditions, etc.
— water rate: ± 1 %;
— gas rate: ± 1 %;
— time: ± 0,2 s;
— temperatures:
— ambient: ± 1 K;
— water: ± 0,5 K;
— gas: ± 0,5 K;
— mass: ± 0, 5 %;
— gas pressure: ± 1 %;
— gas calorific value: ± 1 %;
— gas density: ± 0,5 %;
— electrical auxiliary energy: ± 2 %;
— electrical generated energy: ± 2 %.
The stated measurement uncertainties relate to individual measurements. For measurements that
combine a number of individual measurements, smaller uncertainties on the individual measurements
may be necessary to ensure a total uncertainty within ± 2 % under the steady-state conditions.
These uncertainties correspond to two standard deviations (2σ).
4.3 Test conditions
4.3.1 General
The tests shall be carried out in the summer mode when the mCHP generator of the appliance is
producing domestic hot water only.
For all tests defined by this standard, the same adjustment of the appliance shall be maintained.
4.3.2 Test room
The appliance shall be installed in a well-ventilated, draught-free room (air speed less than 0,5 m/s).
The appliance shall be protected from direct solar radiation and radiation from heat generators.
4.3.3 Water supply
For the tests:
— the domestic water pressure is the static inlet pressure under dynamic conditions measured as
close as possible to the appliance;
— the inlet and outlet temperatures of the domestic water shall be measured in the centre of the flow
and as close as possible to the appliance.
The inlet temperatures shall be measured immediately upstream of the water inlet connection. Except
where otherwise stated, the outlet temperatures shall be measured immediately downstream of the
outlet connection or, in the case of an appliance with spout delivery, by means of an immersed
temperature measuring device, e.g. a u-tube fitted at the outlet of a tube of the same length as the
minimum length of the spout normally supplied with the appliance.
The hot water temperature shall be measured with a rapid response thermometer.
“Rapid response thermometer” means a measuring instrument with a response time such that 90 % of
the final temperature rise, from 15 °C to 100 °C, is obtained within about 1 s, when the sensor is
plunged into still water.
4.3.4 Steady-state
Steady-state operating conditions shall be regarded as established when the appliance operates for
sufficient time to reach thermal stabilization. The steady-state is reached when the water temperature
at the outlet does not vary by more than ± 0,5 K.
NOTE This condition can be reached with a gas that is different from the specified test gas, provided that the
appliance is supplied with the specified test gas for at least 5 min before the requirements are verified.
4.3.5 Initial adjustment of the appliance
The appliance shall be installed in accordance with the appliance instructions.
The heat input shall be adjusted to within ± 2 % of the nominal domestic hot water heat input.
The delivered water temperature (T ) at the appliance outlet shall be as follows (see Figures A.1 and
d
A.2):
a) appliances with an adjustable temperature: the tests shall be carried out at a temperature not
greater than 65 °C, with a minimum temperature increase equal to or greater than 45 K above cold
water inlet temperature.
b) appliances with a fixed temperature: the tests shall be carried out at the temperature specified in
the appliance instructions, with a minimum temperature increase equal to or greater than 45 K
above cold water inlet temperature.
The same conditions of initial adjustment stated in the instructions shall be used for all the tests.
These conditions shall be included in the test report.
4.3.6 Electrical supply
The appliance shall be supplied with the nominal voltage or a voltage included within the range of
nominal voltages stated in the installation instructions.
4.3.7 Delivered electrical energy
Arrangement shall be made to enable the delivered electrical energy to be measured.
NOTE The delivered electrical energy to be measured may be dissipated by a resistor or exported to the grid.
5 Determination of the energy consumption and electrical energy generation of
the appliance
5.1 General
This clause defines the test methods to be employed in determining the energy consumption and
electrical energy generation of appliances.
5.2 Tapping cycles
All patterns define a 24 h measurement cycle and within that cycle the starting times and the total
energy content (in kWh equivalent of hot water tapped) of each draw-off are defined.
Furthermore, the draw-off can be characterized in two ways, either “basin” type draw-off versus
“continuous flow” draw-off.
The aim of the “basin” type is to arrive at an average temperature of the tub, so all supplied energy can
be considered useful from the very beginning of the draw-off (minimum useful temperature increase is
0 K). The average temperature rising (ΔT) to be achieved during tapping, shall be for floor cleaning and
bath 30 K and for the dish washes 45 K.
The aim of the “continuous flow” type is to use only the water with a minimum temperature. For the
shower, household cleaning and large draw-offs a temperature rise of 30 K shall be reached before
counting the useful energy. For the small draw-offs a temperature rise of 15 K shall be reached.
NOTE 1 The temperature rises (in K) stated above are equivalent to the temperatures (in °C) given by the load
profiles tables in Regulations n° 811/2013, n° 812/2013, n° 813/2013 and n° 814/2013 based on 10 °C inlet
water temperature.
The tapping flow rates used to perform the different types of tapping of each of the seven tapping cycles
defined by Tables 1 to 7.When these tapping rates result in a tapping period of less than 15 s the flow
rate should be decreased such that the tapping period is (16 ± 1) s.
In the tapping cycles, the requirements for flow and temperatures are based on the delivery on the taps
in a mix of hot and cold water. Under the conditions of the initial adjustment, the appliance itself
produces hot water with a minimum temperature rise of 45 K.
To fulfil the requirements stated in Tables 1 to 7 mixing hot water from the appliance with cold water of
10°C at the tap is allowed either by using a mixing device (see Figure B.5) or by recalculating the
minimum appliance flow rate (see 3.20) according to the following formula:
∆T
useful
D D ⋅ (1)
min useful(ΔT )
∆T
d
Where:
D is the minimum test rig setting for the appliance flow rate of each
min
individual tapping at temperature rise corresponding to ΔTd, in l/min;
D is the useful water flow rate according to Tables 1 to 7, in l/min;
useful
(ΔT)
ΔT is the delivered water temperature rise with a minimum of 45 K, in K;
d
ΔT is the higher value between the temperature rise to be achieved and the
useful
minimum temperature rise for counting the useful energy according to
Tables 1 to 7, in K.
The tests shall be performed by using the useful flow rates defined by Tables 1 to 7. If the appliance
cannot deliver these flow rates, for instance due to the flow restrictor, it shall be checked that the
requirements are fulfilled by checking that D is delivered.
min
If by design the appliance is fitted with a flow restrictor, the tests shall be carried out with this flow
restrictor.
=
Table 1 — Load profile S
Tappin Start Energy Type of draw off Useful ΔT Minimum
g n° (kWh) water to be ΔT for
(h.min)
flow rate achieved counting
at the tap during useful
a
tapping energy
(l/min)
(K) (K)
1 07.00 0,105 Small 3  15
2 07.30 0,105 Small 3  15
3 08.30 0,105 Small 3  15
4 09.30 0,105 Small 3  15
5 11.30 0,105 Small 3  15
6 11.45 0,105 Small 3  15
7 12.45 0,315 Dish washing n°1 4 45 0
8 18.00 0,105 Small 3  15
9 18.15 0,105 Household 3  30
cleaning
10 20.30 0,420 Dish washing n°2 4 45 0
11 21.30 0,525 Large 5  35
Q 2,100
ref
Equivalent hot water litres at 60°C 36

a
On continuous basis.
Table 2 — Load profile M
Tappin Start Energy Type of draw off Useful ΔT to be Minimum
g n° (h.min) (kWh) water achieved ΔT for
flow rate during counting
b
at the tapping useful
tap energy
(K)
(l/min) (K)
1 07.00 0,105 Small 3  15
2 07.05 1,400 Shower n°1 6  30
3 07.30 0,105 Small 3  15
4 08.01 0,105 Small 3  15
5 08.15 0,105 Small 3  15
6 08.30 0,105 Small 3  15
7 08.45 0,105 Small 3  15
8 09.00 0,105 Small 3  15
9 09.30 0,105 Small 3  15
10 10.30 0,105 Floor cleaning 3 30 0
11 11.30 0,105 Small 3  15
12 11.45 0,105 Small 3  15
13 12.45 0,315 Dish washing n°1 4 45 0
14 14.30 0,105 Small 3  15
15 15.30 0,105 Small 3  15
16 16.30 0,105 Small 3  15
17 18.00 0,105 Small 3  15
18 18.15 0,105 Household cleaning 3  30
19 18.30 0,105 Household cleaning 3  30
20 19.00 0,105 Small 3  15
21 20.30 0,735 Dish washing n°3 4 45 0
22 21.15 0,105 Small 3  15
23 21.30 1,400 Shower n°1 6  30
Q 5,845
ref
Equivalent hot water litres at 60°C 100,2

b
On continuous basis.
Table 3 — Load profile L
Tapping Start Energy Type of draw off Useful ΔT to be Minimum
n° (h.min) (kWh) water achieved ΔT for
flow rate during counting
at the tap c useful
tapping
energy
(l/min)
(K)
(K)
1 07.00 0,105 Small 3  15
2 07.05 1,400 Shower n°1 6  30
3 07.30 0,105 Small 3  15
4 07.45 0,105 Small 3  15
5 08.05 3,605 Bath n°1 10 30 0
6 08.25 0,105 Small 3  15
7 08.30 0,105 Small 3  15
8 08.45 0,105 Small 3  15
9 09.00 0,105 Small 3  15
10 09.30 0,105 Small 3  15
11 10.30 0,105 Floor cleaning 3 30 0
12 11.30 0,105 Small 3  15
13 11.45 0,105 Small 3  15
14 12.45 0,315 Dish washing n°1 4 45 0
15 14.30 0,105 Small 3  15
16 15.30 0,105 Small 3  15
17 16.30 0,105 Small 3  15
18 18.00 0,105 Small 3  15
19 18.15 0,105 Household cleaning 3  30
20 18.30 0,105 Household cleaning 3  30
21 19.00 0,105 Small 3  15
22 20.30 0,735 Dish washing n°3 4 45 0
23 21.00 3,605 Bath n°1 10 30 0
24 21.30 0,105 Small 3  15
Q 11,655
ref
Equivalent hot water litres at 60°C 199,8

c
On continuous basis.
Table 4 — Load profile XL
Tapping Start Energy Type of draw off Useful ΔT to be Minimum
n° (h.min) (kWh) water achieved ΔT
flow rate during forcounting
at the tap d useful
tapping
energy
(l/min)
(K)
(K)
1 07.00 0,105 Small 3  15
2 07.15 1,820 Shower n°2 6  30
3 07.26 0,105 Small 3  15
4 07.45 4,420 Bath n°2 10 30 0
5 08.01 0,105 Small 3  15
6 08.15 0,105 Small 3  15
7 08.30 0,105 Small 3  15
8 08.45 0,105 Small 3  15
9 09.00 0,105 Small 3  15
10 09.30 0,105 Small 3  15
11 10.00 0,105 Small 3  15
12 10.30 0,105 Floor cleaning 3 30 0
13 11.00 0,105 Small 3  15
14 11.30 0,105 Small 3  15
15 11.45 0,105 Small 3  15
16 12.45 0,735 Dish washing n°3 4 45 0
17 14.30 0,105 Small 3  15
18 15.00 0,105 Small 3  15
19 15.30 0,105 Small 3  15
20 16.00 0,105 Small 3  15
21 16.30 0,105 Small 3  15
22 17.00 0,105 Small 3  15
23 18.00 0,105 Small 3  15
24 18.15 0,105 Household cleaning 3  30
25 18.30 0,105 Household cleaning 3  30
26 19.00 0,105 Small 3  15
27 20.30 0,735 Dish washing n°3 4 45 0
28 20.46 4,420 Bath n°2 10 30 0

d
On continuous basis.
29 21.15 0,105 Small 3  15
30 21.30 4,420 Bath n°2 10 30 0
Q 19,070
ref
Equivalent hot water litres at 60°C 325
Table 5 — Load profile XXL
Tappin Start Energy Type of draw off Useful ΔT to be Minimum
g n° (h.min) (kWh) water achieved ΔT
flow rate during forcountin
e
at the tapping g useful
tap energy
(K)
(l/min) (K)
1 07.00 0,105 Small 3  15
2 07.15 1,820 Shower n°2 6  30
3 07.26 0,105 Small 3  15
4 07.45 6,240 Shower + bath 16 30 0
5 08.01 0,105 Small 3  15
6 08.15 0,105 Small 3  15
7 08.30 0,105 Small 3  15
8 08.45 0,105 Small 3  15
9 09.00 0,105 Small 3  15
10 09.30 0,105 Small 3  15
11 10.00 0,105 Small 3  15
12 10.30 0,105 Floor cleaning 3 30 0
13 11.00 0,105 Small 3  15
14 11.30 0,105 Small 3  15
15 11.45 0,105 Small 3  15
16 12.45 0,735 Dish washing n°3 4 45 0
17 14.30 0,105 Small 3  15
18 15.00 0,105 Small 3  15
19 15.30 0,105 Small 3  15
20 16.00 0,105 Small 3  15
21 16.30 0,105 Small 3  15
e
On continuous basis.
22 17.00 0,105 Small 3  15
23 18.00 0,105 Small 3  15
24 18.15 0,105 Household cleaning 3  30
25 18.30 0,105 Household cleaning 3  30
26 19.00 0,105 Small 3  15
27 20.30 0,735 Dish washing n°3 4 45 0
28 20.46 6,240 Shower + bath 16 30 0
29 21.15 0,105 Small 3  15
30 21.30 6,240 Shower + bath 16 30 0
Q 24,530
ref
Equivalent hot water litres at 60°C 420
Table 6 — Load profile 3XL
Tappin Start Energy Type of draw off Useful ΔT to be Minimum
g n° (h.min) (kWh) water achieved ΔT for
flow rate during counting
f
at the tapping useful
tap energy
(K)
(l/min) (K)
1 07.00 11,2 General use n°3 48  30
2 08.01 5,04 General use n°8 24  15
3 09.00 1,68 General use n°9 24  15
4 10.30 0,84 General use n°10 24 30 0
5 11.45 1,68 General use n°9 24  15
6 12.45 2,52 General use n°11a 32 45 0
7 15.30 2,52 General use n°11 24  15
8 18.30 3,36 General use n°12 24  15
9 20.30 5,88 General use n°13 32 45 0
10 21.30 12,04 General use n°5 48  30
Q 46,76
ref
Equivalent hot water litres at 60°C 800

f
On continuous basis.
Table 7 — Load profile 4XL
Tappin Start Energy Type of draw off Useful ΔT to be Minimum
g n° (h.min) (kWh) water achieved ΔT for
flow rate during counting
g
at the tapping useful
tap energy
(K)
(l/min) (K)
1 07.00 22,4 General use n°6 96  30
2 08.01 10,08 General use n°2 48  15
3 09.00 3,36 General use n°12a 48  15
4 10.30 1,68 General use n°9a 48 30 0
5 11.45 3,36 General use n°12a 48  15
6 12.45 5,04 General use n°8b 64 45 0
7 15.30 5,04 General use n°8a 48  15
8 18.30 6,72 General use n°1 48  15
9 20.30 11,76 General use n°4 64 45 0
10 21.30 24,08 General use n°7 96  30
Q 93,52
ref
Equivalent hot water litres at 60°C 1600
There are seven different tapping cycles, depending on the use.
For each use, the tapping cycle(s) is (are) based respectively on Tables 1, 2, 3, 4, 5, 6 and 7. Each
individual tapping of the load profiles shall be completed, that means the valve shall be closed, and a
delay of at least one minute is required, before starting the following delivery.
Beginning and ending of the tapping cycles, for appliances with energy consumption between deliveries
(gas or electricity), the tapping start with the tapping at 21h30. The measured cycles start from the time
the burner is extinguished following the 21h30 delivery. The measured cycles end when the burner is
extinguished following the last tapping at 21h30 on the next day.
It shall be ensured that the thermal situation at the beginning and at the end of the test is met.
NOTE 2 The above indicated test conditions ensure that the test results are equivalent to the required
measurement conditions of Regulations n° 811/2013, n° 812/2013, n° 813/2013 and n° 814/2013.
NOTE 3 This measurement can be performed after a 24 h preliminary tapping cycle in order to ensure the
thermal stabilization.
g
On continuous basis.
5.3 Measurement of the energy recovered by the useful water
The appliance shall be installed and adjusted in the initial adjustment conditions and in the initial state
conditions defined by 4.3.5.
(kWh) is given by the formula:
The useful energy recovered by the water QH2O
t
n 1
Q c DT⋅ Δ (t)dt (2)
∑
HO w ∫ i i
i=1
where:
n is the number of draws off;
D is the water rate delivered, in l/min;
i
ΔT (t) is the instantaneous temperature rise during the tapping, in K;
i
t is the tapping duration of the useful water, in min;
i
−3
c Is equal to 1,163.10 is the specific heat capacity of water, in kWh/l.K.
w
The useful energy recovered at each individual tapping is set against the values given in Tables 1, 2, 3, 4,
5, 6 and 7.
For each individual tapping, the accuracy of the value shall be ± 10 Wh or ± within 2 % of the energy
content of this specific individual tapping. For the overall tapping cycle the accuracy of the value shall
be within ± 2 %.
5.4 Calculation of gas energy
5.4.1 Calculation of the daily gas energy consumption in summer mode
The daily consumption of gas in the summer mode shall be calculated according to the following
formula:
VQ⋅ K⋅ NCV⋅
g ref
Q = (3)
gas,S
Q
HO
where:
Q is the daily gas energy consumption in summer mode calculated using NCV, in kWh;
gas,S
V is the measured gas consumption during the tapping cycle, in m ;
g
NCV is the net calorific value (at 15 °C and 1013,25 mbar), in kWh/m ;
Q is the measured energy recovered by the water according to 5.3, in kWh;
H O
Q is the total delivered energy of used tapping cycle, value from Tables 1, 2, 3, 4, 5, 6
ref
and 7, in kWh.
and
pp+
288,15
ag
K ⋅ (4)
1013,,25 T + 273 15
g
with:
=
=
p is the atmospheric pressure, in mbar;
a
p is the gas pressure, in mbar;
g
T is the gas temperature, in °C.
g
5.4.2 Calculation of daily gas energy consumption in winter mode
For the dedicated water heaters, if any, Q is equal to Q .
gas,W gas,S
The daily gas energy consumption of gas in the winter mode shall be calculated according to the
following formula:
Q
gas,S
Q = (5)
gas,W
 
 
η ⋅ Q
 CHP,Th−100 gas,S 
1+ 0,5⋅ − 1
 
Q
 ref 
 
 
where:
Q is the daily gas energy consumption calculated in winter mode using NCV, in kWh;
gas,W
Q is the daily gas energy consumption calculated in summer mode using NCV according
gas,S
to 5.4.1, in kWh;
η is the useful thermal efficiency at nominal heat input of the mCHP generator (100 % by
CHP,Th-100
mCHP and 100 % by the supplementary heater) at the temperature regime specified in
the product standard EN 50465:2015 for the appliance space heating function or at the
maximum declared average temperature. The useful thermal efficiency at nominal heat
input will be determined including hydraulic circuit and storage tank if applicable. See
the Figures C.1 and C.2.
Q Is the nominal energy delivered to water during the tapping cycle used, value from
ref
Tables 1, 2, 3, 4, 5, 6 and 7, in kWh.
NOTE Unlike water heaters combination mCHP appliances have two functions in the winter mode, space
heating and domestic hot water. They switch between space heating and domestic hot water functions to fulfil
demands as required by the consumer.
In the summer mode the combination mCHP appliance is 24h in domestic hot water mode or standby
mode.
The heat engine for a combination mCHP appliance in winter mode spends m
...