# C_2014207EN.01002201.xml

| 3.7.2014 | EN | Official Journal of the European Union | C 207/22 |
| --- | --- | --- | --- |

3.7.2014

EN

Official Journal of the European Union

C 207/22

---

Commission communication in the framework of the implementation of Commission Regulation (EU) No 814/2013 implementing Directive 2009/125/EC of the European Parliament and of the Council with regard to ecodesign requirements for water heaters and hot water storage tanks and of Commission Delegated Regulation (EU) No 812/2013 supplementing Directive 2010/30/EU of the European Parliament and of the Council with regard to the energy labelling of water heaters, hot water storage tanks and packages of water heater and solar device

(2014/C 207/03)

1.   Publication of titles and references of transitional methods of measurement and calculation (1) for the implementation of Regulation (EU) No 814/2013, and in particular Annexes III, IV and V thereof, and for the implementation of Delegated Regulation (EU) No 812/2013, and in particular Annexes VII, VIII and IX thereof.

1

2.   Parameters in italics are determined in Regulation (EU) No 814/2013 and in Delegated Regulation (EU) No 812/2013.

in italics

3.   References

| Measured/calculated parameter | Organisation | Reference | Title |
| --- | --- | --- | --- |
| Test procedure for Asol
  , IAM and additional elements of collector efficiency testing of parameters η0
  , a1
  , a2
  , IAM | CEN | EN 12975-2:2006 | Thermal solar systems and components — Solar collectors — Part 2: Test methods |
| Sound power level of heat pump water heaters | CEN | EN 12102:2013 | Air conditioners, liquid chilling packages, heat pumps and dehumidifiers with electrically driven compressors for space heating and cooling — Measurement of airborne noise — Determination of the sound power.
  The standard EN12102:2013 is applicable with the following modifications:
  Clause 3.3 of EN12102:2013. Replace the 2nd paragraph by: The ‘standard operating conditions’ shall be defined as the conditions for the operating points of the unit in accordance with Regulation (EU) No 814/2013, Annex III, Table 4. The definitions given in EN16147 also apply.
  Clause 5: Replace the 2nd paragraph ‘The unit ...’ by: The unit shall be installed and connected (e.g. shape and dimension of air ducts, water pipes connection, etc.) for the test as recommended by the manufacturer in its installation and operation manual and tested in the rated conditions indicated in Regulation (EU) No 814/2013, Annex III, Table 4. The accessories provided by option (e. g. heating element) shall not be included in the test.
  The unit is kept at ambient conditions of operation for at least 12 h; The temp. at the top of the tank of the water heater is monitored; The electric consumption of the compressor, the fan (if present), the circulation pump (if present), are monitored (to know the period of defrosting).
  The product is filled with cold water at 10 °C ± 5 °C.
  Clause 5: Replace the 4th paragraph ‘The noise measurement ...’ by: The measurement points shall be performed in steady state conditions at the following water temperatures at the top of the tank: 1st point at 25 ± 3 °C, 2nd point at (Tset+25)/2 ± 3 °C, 3rd point at Tset +0/- 6 °C (Tset is water temperature in ‘out of the box-mode’).
  During the measurement of noise:
  the water temp. at the top of the tank should be included in the tolerance range (e.g. included between 25 °C ± 3 °C for the first measurement);
  the periods of defrosting are excluded (zero electric consumption of the compressor, the fan or the circulation’s pump). |
| Sound power level of gas-fired instantaneous and storage water heaters | CEN | EN 15036-1:2006 | Heating boilers. Test regulations for airborne noise emissions from heat generators. Airborne noise emissions from heat generators |
| ISO EN 3741:2010 | Acoustics — Determination of Sound Power Levels of Noise Sources Using Sound Pressure — Precision Methods for Reverberation Room |
| ISO EN 3745:2012 | Acoustics — Determination of sound power levels and sound energy levels of noise sources using sound pressure — Precision methods for anechoic rooms and hemi-anechoic rooms |
| Sound power level of electric instantaneous and storage water heaters | Cenelec | Considering that no procedure is available for the time being it is assumed that water heaters without moving parts have a noise of 15 dB | |
| Test gases | CEN | EN 437:2003/A1:2009 | Test gases — Test pressures — Appliance categories |
| Standby power consumption solsb | CLC | EN 62301:2005 | Household Electrical Appliances: Measurement of standby power |
| Test-rig for Qelec
  of electric storage water heaters | CLC | prEN 50440:2014 | Efficiency of domestic electrical storage water heaters and testing methods |
| Test-rig for Qelec
  of electric instantaneous water heaters | CLC | EN 50193-1:2013 | Closed electrical instantaneous water heaters, Methods for measuring performance. |
| Test-rig for Qfuel
  and Qelec
  of gas-fired instantaneous water heaters | CEN | EN 26:1997/A3:2006, Clause 7.1, except clause 7.1.5.4. | Gas-fired instantaneous water heaters for sanitary uses production, fitted with atmospheric burners |
| Test-rig for Qfuel
  and Qelec
  of gas-fired storage water heaters | CEN | EN 89:1999/A4:2006, Clause 7.1, except clause 7.1.5.4. | Gas-fired storage water heaters for the production of domestic hot water |
| Test-preparation for Qfuel
  of gas-fired instantaneous water heaters and gas-fired storage water heaters | CEN | EN 13203-2: 2006, Annex B ‘Test rig and measurement devices’ | Gas-fired domestic appliances producing hot water — Appliances not exceeding 70 kW heat input and 300 litres water storage capacity — Part 2: Assessment of energy consumption |
| Test-preparation for Qfuel
  of heat pump water heaters using fuel | CEN | EN 13203-2: 2006, Annex B ‘Test rig and measurement devices’ | Gas-fired domestic appliances producing hot water — Appliances not exceeding 70 kW heat input and 300 litres water storage capacity — Part 2: Assessment of energy consumption |
| Test-rig for heat pump water heaters | CEN | EN 16147:2011 | Heat pumps with electrically driven compressors — Testing and requirements for marking for domestic hot water units |
| Standing loss S of storage tanks | CEN | EN 12897: 2006, clause 6.2.7, Annex B and Annex A (for the correct positioning of the heater) | Water Supply – Specification for indirectly heated unvented (closed) storage water heaters. |
| Standing loss S and psbsol of storage tanks | CEN | EN 12977-3:2012 | Thermal solar systems and components — Custom built systems — Part 3: Performance test methods for solar water heater stores |
| Standing loss S of storage tanks | CEN | EN 15332:2007, Clauses 5.1 and 5.4 (Measurement of standby-loss). | Heating boilers – Energy assessment of hot water storage tanks |
| Standing loss S of storage tanks | CLC | EN 60379: 2004, clauses 9, 10, 11, 12 and 14 | Methods for measuring the performance of electric storage water-heaters for household purposes |
| Emission of nitrogen oxides NOx
  for gas-fired storage water heaters | CEN | prEN 89:2012, clause 6.18 Nitrogen oxides | Gas-fired storage water heaters for the production of domestic hot water |
| Emission of nitrogen oxides NOx
  for gas-fired instantaneous water heaters | CEN | prEN 26, clause 6.9.3 Nitrogen oxides emissions | Gas-fired instantaneous water heaters for the production of domestic hot water |
| Water heating energy efficiency ηwh
  of water heaters and standing loss S of storage tanks | European Commission | Point 4 of this Communication | Additional elements for measurements and calculations related to the energy efficiency of water heaters and storage tanks |

Measured/calculated parameter

Organisation

Reference

Title

Test procedure for Asol
  , IAM and additional elements of collector efficiency testing of parameters η0
  , a1
  , a2
  , IAM

Asol

IAM

η0

a1

a2

IAM

CEN

EN 12975-2:2006

Thermal solar systems and components — Solar collectors — Part 2: Test methods

Sound power level of heat pump water heaters

CEN

EN 12102:2013

Air conditioners, liquid chilling packages, heat pumps and dehumidifiers with electrically driven compressors for space heating and cooling — Measurement of airborne noise — Determination of the sound power.

The standard EN12102:2013 is applicable with the following modifications:

Clause 3.3 of EN12102:2013. Replace the 2nd paragraph by: The ‘standard operating conditions’ shall be defined as the conditions for the operating points of the unit in accordance with Regulation (EU) No 814/2013, Annex III, Table 4. The definitions given in EN16147 also apply.

Clause 5: Replace the 2nd paragraph ‘The unit ...’ by: The unit shall be installed and connected (e.g. shape and dimension of air ducts, water pipes connection, etc.) for the test as recommended by the manufacturer in its installation and operation manual and tested in the rated conditions indicated in Regulation (EU) No 814/2013, Annex III, Table 4. The accessories provided by option (e. g. heating element) shall not be included in the test.

The unit is kept at ambient conditions of operation for at least 12 h; The temp. at the top of the tank of the water heater is monitored; The electric consumption of the compressor, the fan (if present), the circulation pump (if present), are monitored (to know the period of defrosting).

The product is filled with cold water at 10 °C ± 5 °C.

Clause 5: Replace the 4th paragraph ‘The noise measurement ...’ by: The measurement points shall be performed in steady state conditions at the following water temperatures at the top of the tank: 1st point at 25 ± 3 °C, 2nd point at (Tset+25)/2 ± 3 °C, 3rd point at Tset +0/- 6 °C (Tset is water temperature in ‘out of the box-mode’).

During the measurement of noise:

the water temp. at the top of the tank should be included in the tolerance range (e.g. included between 25 °C ± 3 °C for the first measurement);

the periods of defrosting are excluded (zero electric consumption of the compressor, the fan or the circulation’s pump).

Sound power level of gas-fired instantaneous and storage water heaters

CEN

EN 15036-1:2006

Heating boilers. Test regulations for airborne noise emissions from heat generators. Airborne noise emissions from heat generators

ISO EN 3741:2010

Acoustics — Determination of Sound Power Levels of Noise Sources Using Sound Pressure — Precision Methods for Reverberation Room

ISO EN 3745:2012

Acoustics — Determination of sound power levels and sound energy levels of noise sources using sound pressure — Precision methods for anechoic rooms and hemi-anechoic rooms

Sound power level of electric instantaneous and storage water heaters

Cenelec

Considering that no procedure is available for the time being it is assumed that water heaters without moving parts have a noise of 15 dB

Test gases

CEN

EN 437:2003/A1:2009

Test gases — Test pressures — Appliance categories

Standby power consumption solsb

CLC

EN 62301:2005

Household Electrical Appliances: Measurement of standby power

Test-rig for Qelec
  of electric storage water heaters

Qelec

CLC

prEN 50440:2014

Efficiency of domestic electrical storage water heaters and testing methods

Test-rig for Qelec
  of electric instantaneous water heaters

Qelec

CLC

EN 50193-1:2013

Closed electrical instantaneous water heaters, Methods for measuring performance.

Test-rig for Qfuel
  and Qelec
  of gas-fired instantaneous water heaters

Qfuel

Qelec

CEN

EN 26:1997/A3:2006, Clause 7.1, except clause 7.1.5.4.

Gas-fired instantaneous water heaters for sanitary uses production, fitted with atmospheric burners

Test-rig for Qfuel
  and Qelec
  of gas-fired storage water heaters

Qfuel

Qelec

CEN

EN 89:1999/A4:2006, Clause 7.1, except clause 7.1.5.4.

Gas-fired storage water heaters for the production of domestic hot water

Test-preparation for Qfuel
  of gas-fired instantaneous water heaters and gas-fired storage water heaters

Qfuel

CEN

EN 13203-2: 2006, Annex B ‘Test rig and measurement devices’

Gas-fired domestic appliances producing hot water — Appliances not exceeding 70 kW heat input and 300 litres water storage capacity — Part 2: Assessment of energy consumption

Test-preparation for Qfuel
  of heat pump water heaters using fuel

Qfuel

CEN

EN 13203-2: 2006, Annex B ‘Test rig and measurement devices’

Gas-fired domestic appliances producing hot water — Appliances not exceeding 70 kW heat input and 300 litres water storage capacity — Part 2: Assessment of energy consumption

Test-rig for heat pump water heaters

CEN

EN 16147:2011

Heat pumps with electrically driven compressors — Testing and requirements for marking for domestic hot water units

Standing loss S of storage tanks

S

CEN

EN 12897: 2006, clause 6.2.7, Annex B and Annex A (for the correct positioning of the heater)

Water Supply – Specification for indirectly heated unvented (closed) storage water heaters.

Standing loss S and psbsol of storage tanks

S

CEN

EN 12977-3:2012

Thermal solar systems and components — Custom built systems — Part 3: Performance test methods for solar water heater stores

Standing loss S of storage tanks

S

CEN

EN 15332:2007, Clauses 5.1 and 5.4 (Measurement of standby-loss).

Heating boilers – Energy assessment of hot water storage tanks

Standing loss S of storage tanks

S

CLC

EN 60379: 2004, clauses 9, 10, 11, 12 and 14

Methods for measuring the performance of electric storage water-heaters for household purposes

Emission of nitrogen oxides NOx
  for gas-fired storage water heaters

NOx

CEN

prEN 89:2012, clause 6.18 Nitrogen oxides

Gas-fired storage water heaters for the production of domestic hot water

Emission of nitrogen oxides NOx
  for gas-fired instantaneous water heaters

NOx

CEN

prEN 26, clause 6.9.3 Nitrogen oxides emissions

Gas-fired instantaneous water heaters for the production of domestic hot water

Water heating energy efficiency ηwh
  of water heaters and standing loss S of storage tanks

ηwh

S

European Commission

Point 4 of this Communication

Additional elements for measurements and calculations related to the energy efficiency of water heaters and storage tanks

4.   Additional elements for measurements and calculations related to the energy efficiency of water heaters and storage tanks

For the purpose of Delegated Regulation (EU) No 812/2013 and Regulation (EU) No 814/2013 each water heater shall be tested in the ‘out of the box-mode’.

The ‘out of the box-mode’ is the standard operating condition, setting or mode set by the manufacturer at factory level, to be active immediately after the appliance installation, suitable for normal use by the end-user according to the water tapping pattern for which the product has been designed and placed on the market. Any change to a different operating condition, setting or mode, if applicable, shall be the result of an intentional intervention by the end-user, and cannot be automatically modified by the water heater at any time, except for smart control function adapting the water heating process to individual usage conditions with the aim of reducing energy consumption.

In case of combination water heaters, no weighting factors taking into account differences between summer and winter mode shall be considered for the measurement/calculation of Qelec and Qfuel.

elec

fuel

In case of conventional water heaters using fuels, in the calculation formula for the Annual Electricity Consumption (AEC) only (see Delegated Regulation (EU) No 812/2013, Annex VIII, point 4.a), the ambient correction Qcor is set equal to zero.

cor

4.1.   Definitions

—

‘uncertainty of measurement (accuracy)’

—

‘permissible deviation (average over test period)’

—

‘permissible deviations of individual measured values from average values’

4.2.   Energy inputs

(a)   Electricity and fossil fuels

| Measured parameter | Unit | Value | Permissible deviation (average over test period) | Uncertainty of measurement (accuracy) |
| --- | --- | --- | --- | --- |
| Electricity |
| Power | W | | | ± 2 % |
| Energy | kWh | | | ± 2 % |
| Voltage, test-period > 48 h | V | 230/400 | ± 4 % | ± 0,5 % |
| Voltage, test-period < 48 h | V | 230/400 | ± 4 % | ± 0,5 % |
| Voltage, test-period < 1 h | V | 230/400 | ± 4 % | ± 0,5 % |
| Electric current | A | | | ± 0,5 % |
| Frequency | Hz | 50 | ± 1 % | |
| Gas |
| Types | — | Test gases EN 437 | | |
| Net calorific value (NCV) and | MJ/m3 | Test gases EN 437 | | ± 1 % |
| Gross calorific value (GCV) | | | | |
| Temperature | K | 288,15 | | ± 0,5 |
| Pressure | mbar | 1 013,25 | | ± 1 % |
| Density | dm3/kg | | | ± 0,5 % |
| Flow rate | m3/s or l/min | | | ± 1 % |
| Oil |
| Heating gas oil |
| Composition, Carbon/Hydrogen/Sulphur | kg/kg | 86/13,6/0,2 % | | |
| N-fraction | mg/kg | 140 | ± 70 | |
| Net calorific value (NCV, Hi) | MJ/kg | 42,689 (2) | | |
| Gross calorific value (GCV, Hs) | MJ/kg | 45,55 | | |
| Density ρ15 at 15 °C | kg/dm3 | 0,85 | | |
| Kerosene |
| composition, Carbon/Hydrogen/Sulfur | kg/kg | 85/14,1/0,4 % | | |
| Net calorific value (NCV, Hi) | MJ/kg | 43,3 (2) | | |
| Gross calorific value (GCV, Hs) | MJ/kg | 46,2 | | |
| density ρ15 at 15 °C | kg/dm3 | 0,79 | | |

Measured parameter

Unit

Value

Permissible deviation (average over test period)

Uncertainty of measurement (accuracy)

Electricity

Electricity

Power

W

± 2 %

Energy

kWh

± 2 %

Voltage, test-period > 48 h

V

230/400

± 4 %

± 0,5 %

Voltage, test-period < 48 h

V

230/400

± 4 %

± 0,5 %

Voltage, test-period < 1 h

V

230/400

± 4 %

± 0,5 %

Electric current

A

± 0,5 %

Frequency

Hz

50

± 1 %

Gas

Gas

Types

—

Test gases EN 437

Net calorific value (NCV) and

MJ/m3

3

Test gases EN 437

± 1 %

Gross calorific value (GCV)

Temperature

K

288,15

± 0,5

Pressure

mbar

1 013,25

± 1 %

Density

dm3/kg

3

± 0,5 %

Flow rate

m3/s or l/min

3

± 1 %

Oil

Oil

Heating gas oil

Heating gas oil

Composition, Carbon/Hydrogen/Sulphur

kg/kg

86/13,6/0,2 %

N-fraction

mg/kg

140

± 70

Net calorific value (NCV, Hi)

MJ/kg

42,689 (2)

2

Gross calorific value (GCV, Hs)

GCV

MJ/kg

45,55

Density ρ15 at 15 °C

kg/dm3

3

0,85

Kerosene

Kerosene

composition, Carbon/Hydrogen/Sulfur

kg/kg

85/14,1/0,4 %

Net calorific value (NCV, Hi)

MJ/kg

43,3 (2)

2

Gross calorific value (GCV, Hs)

GCV

MJ/kg

46,2

density ρ15 at 15 °C

kg/dm3

3

0,79

(b)   Solar energy for solar collector tests

| Measured parameter | Unit | Value | Permissible deviation (average over test period) | Uncertainty of measurement (accuracy) |
| --- | --- | --- | --- | --- |
| Test solar irradiance (global G, short wave) | W/m2 | > 700 W/m2 | ± 50 W/m2 (test) | ± 10 W/m2 (indoors) |
| Diffuse solar irradiance (fraction of total G) | % | < 30 % | | |
| Thermal irradiance variation (indoors) | W/m2 | | | ± 10 W/m2 |
| Fluid temperature at collector inlet/outlet | °C/K | range 0– 99 °C | ± 0,1 K | ± 0,1 K |
| Fluid temperature difference inlet/outlet | | | | ± 0,05 K |
| Incidence angle (to normal) | ° | < 20° | ± 2 % (< 20°) | |
| Air speed parallel to collector | m/s | 3 ± 1 m/s | | 0,5 m/s |
| Fluid flow rate (also for simulator) | kg/s | 0,02 kg/s per m2 collector aperture area | ± 10 % between tests | |
| Pipe heat loss of loop in test | W/K | < 0,2 W/K | | |

Measured parameter

Unit

Value

Permissible deviation (average over test period)

Uncertainty of measurement (accuracy)

Test solar irradiance (global G, short wave)

W/m2

2

> 700 W/m2

2

± 50 W/m2 (test)

2

± 10 W/m2 (indoors)

2

Diffuse solar irradiance (fraction of total G)

%

< 30 %

Thermal irradiance variation (indoors)

W/m2

2

± 10 W/m2

2

Fluid temperature at collector inlet/outlet

°C/K

range 0– 99 °C

± 0,1 K

± 0,1 K

Fluid temperature difference inlet/outlet

± 0,05 K

Incidence angle (to normal)

°

< 20°

± 2 % (< 20°)

Air speed parallel to collector

m/s

3 ± 1 m/s

0,5 m/s

Fluid flow rate (also for simulator)

kg/s

0,02 kg/s per m2 collector aperture area

2

± 10 % between tests

Pipe heat loss of loop in test

W/K

< 0,2 W/K

(c)   Ambient heat energy

| Measured parameter | Unit | Permissible deviation (average over test period) | Permissible deviations (individual tests) | Uncertainty of measurement (accuracy) |
| --- | --- | --- | --- | --- |
| Brine or water heat source |
| Water/brine inlet temperature | °C | ± 0,2 | ± 0,5 | ± 0,1 |
| Volume flow | m3/s or l/min | ± 2 % | ± 5 % | ± 2 % |
| Static pressure difference | Pa | — | ± 10 % | ± 5 Pa/5 % |
| Air heat source |
| Outdoor air temperature (dry bulb) Tj | °C | ± 0,3 | ± 1 | ± 0,2 |
| Vent exhaust air temperature | °C | ± 0,3 | ± 1 | ± 0,2 |
| Indoor air temperature | °C | ± 0,3 | ± 1 | ± 0,2 |
| Volume flow | dm3/s | ± 5 % | ± 10 % | ± 5 % |
| Static pressure difference | Pa | — | ± 10 % | ± 5 Pa/5 % |

Measured parameter

Unit

Permissible deviation (average over test period)

Permissible deviations (individual tests)

Uncertainty of measurement (accuracy)

Brine or water heat source

Brine or water heat source

Water/brine inlet temperature

Water/brine inlet temperature

°C

± 0,2

± 0,5

± 0,1

Volume flow

Volume flow

m3/s or l/min

3

± 2 %

± 5 %

± 2 %

Static pressure difference

Pa

—

± 10 %

± 5 Pa/5 %

Air heat source

Air heat source

Outdoor air temperature (dry bulb) Tj

Outdoor air temperature (dry bulb) Tj

°C

± 0,3

± 1

± 0,2

Vent exhaust air temperature

Vent exhaust air temperature

°C

± 0,3

± 1

± 0,2

Indoor air temperature

°C

± 0,3

± 1

± 0,2

Volume flow

Volume flow

dm3/s

3

± 5 %

± 10 %

± 5 %

Static pressure difference

Pa

—

± 10 %

± 5 Pa/5 %

(d)   Test conditions and tolerances on outputs

| Measured parameter | Unit | Value | Permissible deviation (average over test period) | Permissible deviations (individual tests) | Uncertainty of measurement (accuracy) |
| --- | --- | --- | --- | --- | --- |
| Ambient |
| Ambient temperature indoors | °C or K | 20 °C | ± 1 K | ± 2 K | ± 1 K |
| Air speed heat pump (at water heater off) | m/s | < 1,5 m/s | | | |
| Air speed other | m/s | < 0,5 m/s | | | |
| Sanitary water |
| Cold water temperature solar | °C or K | 10 °C | ± 1 K | ± 2 K | ± 0,2 K |
| Cold water temperature other | °C or K | 10 °C | ± 1 K | ± 2 K | ± 0,2 K |
| Cold water pressure gas-fired water heaters | bar | 2 bar | | ± 0,1 bar | |
| Cold water pressure other (except electric instantaneous water heaters) | bar | 3 bar | | | ± 5 % |
| Hot water temperature gas-fired water heaters | °C or K | | | | ± 0,5 K |
| Hot water temperature electric instantaneous | °C or K | | | | ± 1 K |
| Water temperature (in-/outlet) other | °C or K | | | | ± 0,5 K |
| Volume flow rate heat pump water heaters | dm3/s | | ± 5 % | ± 10 % | ± 2 % |
| Volume flow rate Electric Instantaneous Water Heaters | dm3/s | | | | ≥10 l/min: ± 1 %
  < 10 l/min: ± 0,1 l/min |
| Volume flow rate other water heaters | dm3/s | | | | ± 1 % |

Measured parameter

Unit

Value

Permissible deviation (average over test period)

Permissible deviations (individual tests)

Uncertainty of measurement (accuracy)

Ambient

Ambient

Ambient temperature indoors

Ambient temperature indoors

°C or K

20 °C

± 1 K

± 2 K

± 1 K

Air speed heat pump (at water heater off)

m/s

< 1,5 m/s

Air speed other

m/s

< 0,5 m/s

Sanitary water

Sanitary water

Cold water temperature solar

°C or K

10 °C

± 1 K

± 2 K

± 0,2 K

Cold water temperature other

°C or K

10 °C

± 1 K

± 2 K

± 0,2 K

Cold water pressure gas-fired water heaters

bar

2 bar

± 0,1 bar

Cold water pressure other (except electric instantaneous water heaters)

bar

3 bar

± 5 %

Hot water temperature gas-fired water heaters

°C or K

± 0,5 K

Hot water temperature electric instantaneous

°C or K

± 1 K

Water temperature (in-/outlet) other

°C or K

± 0,5 K

Volume flow rate heat pump water heaters

dm3/s

3

± 5 %

± 10 %

± 2 %

Volume flow rate Electric Instantaneous Water Heaters

dm3/s

3

≥10 l/min: ± 1 %

< 10 l/min: ± 0,1 l/min

Volume flow rate other water heaters

dm3/s

3

± 1 %

4.3.   Test procedure for storage water heaters

The test procedure for storage water heaters to establish the daily electricity consumption Qelec
  and the daily fuel consumption Qfuel
  fuel during a 24-hour measurement cycle is the following:

Qelec

Qfuel

(a)   Installation

The product is installed in test environment according to manufacturer’s instructions. Designated floor-standing appliances may be placed on the floor, on a stand supplied with the product, or on a platform for easy access. Wall-mounted products are mounted on a panel at least 150 mm from any structural wall with a free space of at least 250 mm above and below the product and at least 700 mm to the sides. Products designated to be built-in are mounted according to manufacturer’s instructions. The product is shielded from direct solar radiation, except solar collectors.

(b)   Stabilisation

The product is kept at ambient conditions until all parts of the product have reached ambient conditions ± 2 K, at least 24 hours for storage type products.

(c)   Filling and heat-up

The product is filled with cold water. Filling stops at the applicable cold water pressure.

The product is energized in ‘out of the box-mode’ to reach its operating temperature, controlled by the product’s own means of control (thermostat).The next stage starts at thermostat cut out.

(d)   Stabilisation at zero-load

The product is kept at this condition, without draw-offs during at least 12 hours.

Subject to a control cycle this stage ends — and next stage starts — at the first thermostat cut-out after 12 hours.

During this stage the total fuel consumption in kWh in terms of GCV, the total electricity consumption in kWh in terms of final energy and the exact time elapsed in h are recorded.

GCV

(e)   Water draw-offs

For the declared load profile, draw-offs are made in accordance with the specifications of the appropriate 24 h tapping pattern. This stage starts directly after thermostat cut out from stabilisation part with the first tapping at the time-value according to the appropriate tapping load profile (see Regulation (EU) No 814/2013, Annex III point 2 and Delegated Regulation (EU) No 812/2013, Annex VII point (2). From end of last water draw-off until 24:00, no water is tapped.

load profile

During the water draw-offs relevant technical parameters (power, temperature, etc.) are established. For dynamic parameters the overall sample rate is 60 s or less. During draw-offs the recommended sample rate is 5 s or less.

The fossil fuel and electricity consumption over the 24-hour measurement cycle, Qtestfuel and Qtestelec, are corrected as specified in point (h).

testfuel

testelec

(f)   Re-stabilisation at zero-load

The product is kept at nominal operating conditions without draw-offs during at least 12 hours.

Subject to a control cycle this stage ends at the first thermostat cut-out after 12 hours.

During this stage the total fuel consumption in kWh in terms of GCV, the total electricity consumption in kWh final energy and the exact time elapsed in hours are recorded.

GCV

(g)   Mixed water at 40 °C (V40)

Mixed water at 40 °C (V40) is the quantity of water at 40 °C, which has the same heat content (enthalpy) as the hot water which is delivered above 40 °C at the output of the water heater, expressed in litres.

Immediately following measurement according to point (f) a quantity of water is withdrawn through the outlet by supplying cold water. The flow of water from open outlet water heaters is controlled by the inlet valve. The flow in any other type of water heaters is controlled by means of a valve fitted in the outlet or the inlet. The measurement is ended when the outlet temperature drops below 40 °C.

The rate of flow is adjusted to the maximum value according to the declared load profile

The normalised value of the average temperature is calculated according to the following equation:

Formula

Where:

—

Tset

—

θc in °C

—

θ’p in °C

Temperature readings are preferable taken continuously. Alternatively, they may be taken at equal intervals evenly spread over the discharge, for example every 5 litres (maximum). If there is a sharp drop in temperature, additional readings may be necessary in order to correctly calculate the average value θ’p.

Outlet water temperature is always ≥ 40 °C which is to be taken into account for the calculation of θp.

Quantity of hot water V40 in litres delivered with a temperature of at least 40 °C will be calculated by the following equation:

40

Formula

Where:

| — | the volume V40_exp in litres corresponds to the quantity of water delivered at least 40 °C. |
| --- | --- |

—

the volume V40_exp in litres corresponds to the quantity of water delivered at least 40 °C.

40_exp

(h)   Reporting of Qfuel
  and Qelec

Qfuel

Qelec

Qtestfuel and Qtestelec are corrected for any energy surplus or deficit outside the strict 24-hour measurement cycle, i.e. a possible energy difference before and after is taken into account. Furthermore, any surplus or deficit in the delivered useful energy content of the hot water is taken into account in the following equations for Qfuel
  and Qelec
  :

testfuel

testelec

Qfuel

Qelec

Formula

Formula

Where:

—

QH2

—

T3

5

3

5

—

Cact

act

4.4.   Test procedure for fuel instantaneous water heaters

The test procedure for fuel instantaneous water heaters to establish the daily fuel consumption Qfuel
  and the daily electricity consumption Qelec
  during a 24-hour measurement cycle is the following:

Qfuel

Qelec

(a)   Installation

The product is installed in test environment according to manufacturer’s instructions. Designated floor-standing appliances may be placed on the floor, on a stand supplied with the product, or on a platform for easy access. Wall-mounted products are mounted on a panel at least 150 mm from any structural wall with a free space of at least 250 mm above and below the product and at least 700 mm to the sides. Products designated to be built-in are mounted according to manufacturer’s instructions. The product is shielded from direct solar radiation, except solar collectors.

(b)   Stabilisation

The product is kept at ambient conditions until all parts of the product have reached ambient conditions ± 2 K;.

(c)   Water draw-offs

For the declared load profile, draw-offs are made in accordance with the specifications of the appropriate 24 h tapping pattern. This stage starts directly after thermostat cut out from stabilisation part with the first tapping at the time-value according to the appropriate tapping load profile (see Regulation (EU) No 814/2013, Annex III point 2 and Delegated Regulation (EU) No 812/2013, Annex VII point (2). From end of last water draw-off until 24:00, no water is tapped

load profile

During the water draw-offs relevant technical parameters (power, temperature, etc.) are established. For dynamic parameters the overall sample rate is 60 s or less. During draw-offs the recommended sample rate is 5 s or less.

(d)   Reporting of Qfuel
  and Qelec

Qfuel

Qelec

Qtestfuel and Qtestelec shall be corrected in the following equations for Qfuel
  and Qelec
  by taking into account any surplus or deficit in the delivered useful energy content of the hot water.

testfuel

testelec

Qfuel

Qelec

Formula

Formula

Where:

—

QH2

4.5.   Test procedure for heat pump water heaters using electricity

(a)   Installation

The product is installed in test environment according to manufacturer’s instructions. Designated floor-standing appliances may be placed on the floor, on a stand supplied with the product, or on a platform for easy access. Wall-mounted products are mounted on a panel at least 150 mm from any structural wall with a free space of at least 250 mm above and below the product and at least 700 mm to the sides. Products designated to be built-in are mounted according to manufacturer’s instructions.

Products with declared load profiles 3XL or 4XL may be tested on-site, provided test conditions are equivalent, possibly with correction factors, to the ones referenced here.

The installation requirements described in clauses 5.2, 5.4 and 5.5 of EN 16147 are respected.

(b)   Stabilisation

The product is kept at ambient conditions until all parts of the product have reached ambient conditions ± 2 K (at least 24 h for storage heat pump water heater).

The purpose is to verify that the product is working at normal temperature after transport.

(c)   Filling and storage volume (actual capacity Cact)

act

The volume of the tank is measured as follows.

The empty water heater is to be weighted; the weight of taps on inlet and/or outlet pipes shall be considered.

Then the storage water heater is filled with cold water in accordance with the manufacturer’s instruction at cold water pressure. The water supply is then cut off.

The filled water heater is to be weighted.

The difference of the two weights (mact) is to be converted into the volume in litres (Cact).

act

act

Formula

This volume is to be reported in litres to the nearest one-tenth litres. The measured value (Cact) shall not be more than 2 % lower than the rated value.

act

(d)   Filling and heat-up

Products with storage-facilities are filled with cold water (10 ± 2 °C). Filling stops are at the applicable cold water pressure.

The product is energized to reach ‘out of the box-mode’ e.g. for storage temperature. The product’s own means of control (thermostat) are used. The step is performed following the procedure of clause 6.3 of EN 16147. The next step starts at thermostat cut out.

(e)   Standby power input

The standby power input is determined by measuring the electrical power input over an integral number of on-off cycles of the heat pump, initiated by the thermostat situated in the tank, when no hot water is drawn off.

The step is performed following the procedure of clause 6.4 of EN 16147 and the value of Pstby [kW] is determined as equal to

Pstby

Formula

(f)   Water draw-offs

For the declared load profile, draw-offs are made in accordance with the specifications of the appropriate 24 h tapping pattern. This stage starts directly after thermostat cut out from stabilisation part with the first tapping at the time-value according to the appropriate tapping load profile (see Regulation (EU) No 814/2013, Annex III point 2 and Delegated Regulation (EU) No 812/2013, Annex VII point (2). From end of last water draw-off until 24:00, no water is tapped. The required useful energy content of the hot water is the total Qref
  [in kWh].

load profile

Qref

The step is performed following the procedure of clauses 6.5.2 to 6.5.3.5 of EN 16147. The ΔΤdesired in the EN 16147 is defined using the value of Tp
  :

desired

Tp

ΔΤdesired = Tp
  - 10

desired

Tp

At the end of the step Qelec
  [kWh] is determined as equal to

Qelec

Formula

W
  EL-TC
  value is defined in the EN16147.

EL-TC

Products to be classified as off-peak products are energized for a maximum period of 8 consecutive hours between 22:00 and 07:00 of the 24 h tapping pattern. At the end of the 24 h tapping pattern the products are energized till the end of the step.

(g)   Mixed water at 40 °C (V40)

The step is performed following the procedure of clause 6.6 of EN 16147, but avoiding compressor switching off at the end of the last measurement period for the tapping cycles; the value of V40 [L] is determined as equal to Vmax.

V40 [L]

4.6.   Test procedure for electric instantaneous water heaters

Thermal losses from heat transfer processes during operation and standby losses are neglected.

(a)   Set points

User adjustable selectors are set as follows:

| — | If the appliance has a power selector, the selector shall be adjusted to the highest value. |
| --- | --- |

—

If the appliance has a power selector, the selector shall be adjusted to the highest value.

| — | If the appliance has a flow independent temperature selector, the selector shall be adjusted to the highest value. |
| --- | --- |

—

If the appliance has a flow independent temperature selector, the selector shall be adjusted to the highest value.

All non-user adjustable setpoints and other selectors shall be in the ‘out of the box-mode’.

The prescribed minimum flow rate f
  i
  of each individual draw off i of the tapping profile has to be used as defined in load profiles of water heaters. If the minimum flow rate f
  i
  is not achievable, the flow rate is increased until the appliance is switching on and is able to run continuously at or above T
  m
  . This increased flow rate has to be used for the individual draw off instead of the prescribed minimum flow rate f
  i
  .

i

i

m

i

(b)   Static efficiency

The static loss of the appliance Ploss
  at nominal load Pnom
  under steady state conditions is determined. The value of Ploss
  is the sum of all internal power losses (product of current and voltage losses between the terminals and heating elements) of the appliance after a minimum of 30 minutes of operation at nominal conditions.

Ploss

Pnom

Ploss

This test result is in wide ranges independent from the water inlet temperature. This test can be carried out with a cold water inlet temperature in the range of 10 to 25 °C.

For electronically controlled instantaneous water heaters with semiconductor power switches, the voltage across the semiconductor power terminals is subtracted from the measured voltage losses, if the semiconductor power switches are thermally connected to the water. In this case, the heat developed by the semiconductor power switches is transferred to useful energy to heat up the water.

The static efficiency is calculated as:

Formula

Where:

—

ηstatic

—

Pnom

—

Ploss

(c)   Start up losses

This test determines the time tstart i

  which elapses between energizing the heating elements and the delivery of useable water for each draw off of the declared load profile. The test method assumes that the power consumption of the appliance during the start-up period is equal to the power consumed in static mode. Pstatic i

  is the static power consumption in steady state conditions of the appliance for the specific draw off i.

tstart i

Pstatic i

i

Three measurements are done for each different draw off i. The result is the mean value from these three measurements.

i

The start up losses Q
  start i

  are calculated as:

start i

Formula

Where:

—

Qstart i

kWh

i

—

tstart i

i

—

Pstatic i

i

(d)   Calculation of energy demand

The daily energy demand Qelec
  is the sum of losses and useful energy of all individual draw off i per day in kWh. The daily energy demand is calculated as:

Qelec

i

Formula

Where:

—

Qstart i

i

—

Qtap i

i

—

ηstatic

4.7.   Smart control test procedure for water heaters

Smart control factor SCF and of smart control compliance smart shall be determined according to Annex IV point 4 of Regulation (EU) No 814/2013 and Annex VIII point 5 of Delegated Regulation (EU) No 812/2013. The condition for testing the smart control compliance (smart) of water heaters are indicated in Annex III point 3 of Regulation (EU) No 814/2013 and Annex VII point 3 of Delegated Regulation (EU) No 812/2013.

smart

The parameters for determining SCF shall be based on real measurements of the energy consumption with the smart control enabled and disabled.

‘smart control disabled’
  means the state, when the smart is activated, where the smart control function of the water heater is in the learning period.

‘smart control disabled’

‘smart control enabled’
  means the state, when the smart is activated, where the smart control function of the water heater is modulating the outlet temperature in order to save energy.

‘smart control enabled’

(a)   Electric storage water heaters

For Electric storage water heaters use the test methodology described in prEN 50440:2014

(b)   Heat pump water heaters

For HPs WH, SCF is defined using the test methodology proposed by TC59X/WG4, this procedure follows the requirements of prEN 50440:2014 (paragraph 9.2) and shall be applied in conjunction with EN 16147:2011.

In particular:

| — | the value of will be determined following the procedure of the EN16147 paragraphs from. §6.5.2 to § 6.5.3.4 and the time length of test cycle (tTTC) shall be equal to 24 h. The value of is:



  where W
  EL-HP-TC
  and Q
  EL-TC
  are defined in EN16147. |
| --- | --- |

—

the value of Formula will be determined following the procedure of the EN16147 paragraphs from. §6.5.2 to § 6.5.3.4 and the time length of test cycle (tTTC) shall be equal to 24 h. The value of Formula is:

TTC

Formula

where W
  EL-HP-TC
  and Q
  EL-TC
  are defined in EN16147.

EL-HP-TC

EL-TC

| — | the value of will be determined as equal to QTC [kWh] described in §6.5.2 of the EN 16147. |
| --- | --- |

—

the value of Formula will be determined as equal to QTC [kWh] described in §6.5.2 of the EN 16147.

TC

| — | the value of will be determined following the procedure of the EN16147 paragraphs from. §6.5.2 to § 6.5.3.4 and the time length of test cycle (tTTC) shall be equal to 24h The value of is:



  where W
  EL-HP-TC
  and Q
  EL-TC
  are defined in EN16147. |
| --- | --- |

—

the value of Formula will be determined following the procedure of the EN16147 paragraphs from. §6.5.2 to § 6.5.3.4 and the time length of test cycle (tTTC) shall be equal to 24h The value of Formula is:

TTC

Formula

where W
  EL-HP-TC
  and Q
  EL-TC
  are defined in EN16147.

EL-HP-TC

EL-TC

| — | the value of will be determined as equal to QTC [kWh] described in §6.5.2 of the EN 16147. |
| --- | --- |

—

the value of Formula will be determined as equal to QTC [kWh] described in §6.5.2 of the EN 16147.

TC

4.8.   Solar water heaters and solar-only systems, testing and calculation methods

For the assessment of the annual non-solar heat contribution Qnonsol
  in kWh in terms of primary energy and/or kWh in terms of GCV the following methods are applicable:

Qnonsol

GCV

| — | The SOLCAL method (3) |
| --- | --- |

—

The SOLCAL method (3)

3

| — | The SOLICS method (4) |
| --- | --- |

—

The SOLICS method (4)

4

The SOLCAL method requires that the efficiency parameters of the solar collector are assessed separately and that the overall system performance is determined on the basis of the non-solar heat contribution to the solar system and the specific efficiency of a stand-alone water heater.

(a)   Solar collector testing

For solar collectors at least 4 × 4 tests apply, with 4 different collector inlet temperatures tin evenly spaced over the operating range and 4 test samples per collector inlet temperature are measured to obtain test values for the water outlet temperature te, the ambient temperature ta, the solar irradiance G and the measured collector efficiency at the test point ηcol
  . If possible, one inlet temperature is selected with tm = ta ± 3 K to obtain an accurate assessment of the zero-load efficiency η0.
  With fixed collector (no automatic tracking) and test conditions permitting, two test samples are done before solar noon and 2 after. Maximum temperature of the heat transfer fluid should be chosen so that it reflects the maximum of the collectors operating range and results in a temperature difference between the inlet and the outlet collector ΔΤ > 1,0 K.

in

e

a

ηcol

m

a

η0.

For the instantaneous collector efficiency ηcol
  a continuous efficiency curve of the format as in the following equation is obtained by statistical curve fitting of the test point results, using the least square method:

ηcol

ηcol
  = η0
  - a1
  × T*
  m - a2
  × G (T*
  m)2

ηcol

η0

a1

*

m

a2

*

m

2

Where:

—

T*

m

2

-1

T*
  m = (tm - ta)/G

*

m

m

a

Where:

—

ta

—

tm

tm = tin + 0,5 × ΔΤ

m

in

Where:

—

tin

—

ΔΤ

e

in

All tests are performed according to EN 12975-2, EN 12977-2 and EN 12977-3. Converting so-called quasi-dynamic model parameters to a steady-state reference case to arrive at the parameters above is permitted. The Incidence Angle Modifier IAM is determined in accordance with EN 12975-2, from a test at 50° incidence angle to the collector.

IAM

(b)   SOLCAL method

The SOLCAL method requires

| — | The solar collector parameters Asol
  , η0, a1, a2
  and IAM; |
| --- | --- |

—

The solar collector parameters Asol
  , η0, a1, a2
  and IAM;

Asol

η0

1

2

IAM

| — | The nominal volume of the storage tank volume (Vnom) in litres, the volume of the non-solar heat storage (Vbu) in litres and the specific standing loss (psbsol) in W/K (K expresses the difference between store and ambient temperature); |
| --- | --- |

—

The nominal volume of the storage tank volume (Vnom) in litres, the volume of the non-solar heat storage (Vbu) in litres and the specific standing loss (psbsol) in W/K (K expresses the difference between store and ambient temperature);

| — | The auxiliary electricity consumption at stabilised operating conditions Qaux
  ; |
| --- | --- |

—

The auxiliary electricity consumption at stabilised operating conditions Qaux
  ;

Qaux

| — | The standby power consumption solstandby; |
| --- | --- |

—

The standby power consumption solstandby;

solstandby

| — | The pump power consumption solpump, according to EN 16297-1:2012. |
| --- | --- |

—

The pump power consumption solpump, according to EN 16297-1:2012.

solpump

The calculation assumes default values for the specific insulation of the collector loop pipes (= 6 + 0,3 W/Km2) and the heat capacity of the heat exchanger (100×W/Km2). m2 stands for the collector aperture area. Furthermore, it is assumed that the solar heat store periods are less than one month.

2

2

2

For the purpose of establishing the total energy efficiency performance of solar-only system and conventional water heater or of a solar water heater, the SOLCAL method determines the annual non-solar heat contribution Qnonsol
  in kWh with

Qnonsol

Qnonsol = SUM (Qnonsoltm) in kWh/a

Qnonsol

tm

Where:

—

SUM (Qnonsoltm

Qnonsoltm = Lwhtm - LsolWtm + psbSol × Vbu/Vnom × (60 - Ta) × 0,732

tm

tm

tm

The monthly heat demand for the solar thermal system is defined as:

Lwhtm = 30,5 × 0,6 × (Qref
  - 1,09)

tm

Qref

Where:

| — | 0,6 represents a factor to calculate the average heat demand from the load profile; |
| --- | --- |

—

0,6 represents a factor to calculate the average heat demand from the load profile;

| — | 1,09 represents the average distribution losses. |
| --- | --- |

—

1,09 represents the average distribution losses.

The following calculations are performed:

LsolW1tm = Lwhtm ×(1,029×Ytm - 0,065×Xtm - 0,245×Ytm
  2 + 0,0018 × Xtm
  2 + 0,0215×Ytm
  3)

tm

tm

tm

tm

tm

2

tm

2

tm

3

LsolWtm = LsolW1tm - Qbuftm

tm

tm

tm

The minimum value of LsolWtm is 0 and the maximum value is Lwhtm.

tm

tm.

Where:

—

Qbuftm

Formula

Where:

| — | 0,732 is a factor that takes into account the average monthly hours (24 × 30,5); |
| --- | --- |

—

0,732 is a factor that takes into account the average monthly hours (24 × 30,5);

| — | Psbsol is the specific standing loss of the solar heat store in W/K as determined in accordance with point 4.8(a); |
| --- | --- |

—

Psbsol is the specific standing loss of the solar heat store in W/K as determined in accordance with point 4.8(a);

| — | Ta is the monthly average air temperature surrounding the heat store in °C; with |
| --- | --- |

—

Ta is the monthly average air temperature surrounding the heat store in °C; with

| — | Ta = 20 when the heat store is inside the building envelope; |
| --- | --- |

—

Ta = 20 when the heat store is inside the building envelope;

a

| — | Ta = Touttm when the heat store is outside the building envelope; |
| --- | --- |

—

Ta = Touttm when the heat store is outside the building envelope;

a

tm

| — | Touttm is the average daytime temperature in °C for average, colder and warmer climate conditions. |
| --- | --- |

—

Touttm is the average daytime temperature in °C for average, colder and warmer climate conditions.

tm

Xtm and Ytm are aggregated coefficients:

tm

tm

Xtm = Asol
  × (Ac + UL) × etaloop × (Trefw — Touttm) × ccap × 0,732/Lwhtm

tm

Asol

tm

tm

The minimum value of Хtm is 0 and the maximum value is 18.

tm

Where:

| — | Ac = a1
  - а2
  × 40; |
| --- | --- |

—

Ac = a1
  - а2
  × 40;

a1

а2

| — | UL = (6 + 0,3 × Asol
  )/Asol
  is loop losses in W/(m2K); |
| --- | --- |

—

UL = (6 + 0,3 × Asol
  )/Asol
  is loop losses in W/(m2K);

Asol

Asol

2

| — | etaloop is loop efficiency with etaloop = 1 - (η0
  × a1
  )/100; |
| --- | --- |

—

etaloop is loop efficiency with etaloop = 1 - (η0
  × a1
  )/100;

η0

a1

| — | Trefw = 11,6 + 1,18 × 40 + 3,86 × Tcold - 1,32 × Touttm; |
| --- | --- |

—

Trefw = 11,6 + 1,18 × 40 + 3,86 × Tcold - 1,32 × Touttm;

tm;

| — | Tcold is the cold water temperature, default 10 °C; |
| --- | --- |

—

Tcold is the cold water temperature, default 10 °C;

| — | Touttm is the average daytime temperature in °C for average, colder and warmer climate conditions; |
| --- | --- |

—

Touttm is the average daytime temperature in °C for average, colder and warmer climate conditions;

tm

average daytime temperature in °C for average, colder and warmer climate conditions

| — | ccap is storage coefficient with ccap = (75 × Asol
  /Vsol)0,25; |
| --- | --- |

—

ccap is storage coefficient with ccap = (75 × Asol
  /Vsol)0,25;

Asol

0,25

| — | Vsol is the solar storage tank volume, as defined in EN 15316-4-3; |
| --- | --- |

—

Vsol is the solar storage tank volume, as defined in EN 15316-4-3;

Ytm = Asol
  × IAM × η0
  × etaloop × QsolMtm × 0,732/Lwhtm

tm

Asol

IAM

η0

tm

tm

The minimum value of Υtm is 0 and the maximum value is 3.

tm

Where:

—

QsolMtm

average global solar irradiance in W/m2

The auxiliary electricity consumption Qaux
  is calculated as follows:

Qaux

Qaux
  = (solpump × solhrs + solstandby × 24 × 365)/1000

Qaux

solpump

solstandby

Where:

| — | solhrs is the number of active solar hours in h; with |
| --- | --- |

—

solhrs is the number of active solar hours in h; with

| — | solhrs = 2 000 for solar water heaters. |
| --- | --- |

—

solhrs = 2 000 for solar water heaters.

(c)   SOLICS Method

The SOLICS method is based on the test method described in ISO 9459-5:2007. The procedure to determine the solar output is referenced as follows:

| — | Terms and definitions according to ISO 9459-5:2007, chapter 3; |
| --- | --- |

—

Terms and definitions according to ISO 9459-5:2007, chapter 3;

| — | Symbols, units and nomenclature according to ISO 9459-5:2007, chapter 4; |
| --- | --- |

—

Symbols, units and nomenclature according to ISO 9459-5:2007, chapter 4;

| — | The system is mounted according to ISO 9459-5:2007, paragraph 5.1; |
| --- | --- |

—

The system is mounted according to ISO 9459-5:2007, paragraph 5.1;

| — | The test facility, instrumentation and sensor locations are according to ISO 9459-5:2007, chapter 5; |
| --- | --- |

—

The test facility, instrumentation and sensor locations are according to ISO 9459-5:2007, chapter 5;

| — | The tests are performed according to ISO 9459-5:2007, chapter 6; |
| --- | --- |

—

The tests are performed according to ISO 9459-5:2007, chapter 6;

| — | Based on the test results the system parameters are identified according to ISO 9459-5:2007, chapter 7. The dynamic fitting algorithm and simulation model as described in ISO 9459-5:2007, Annex A, are used; |
| --- | --- |

—

Based on the test results the system parameters are identified according to ISO 9459-5:2007, chapter 7. The dynamic fitting algorithm and simulation model as described in ISO 9459-5:2007, Annex A, are used;

| — | The annual performance is calculated with the simulation model as described in ISO 9459-5:2007, Annex A, the identified parameters and the following settings: |
| --- | --- |

—

The annual performance is calculated with the simulation model as described in ISO 9459-5:2007, Annex A, the identified parameters and the following settings:

| — | Average daytime temperature in °C for average, colder and warmer climate conditions and average global solar irradiance in W/m2 for average, colder and warmer climate conditions; |
| --- | --- |

—

Average daytime temperature in °C for average, colder and warmer climate conditions and average global solar irradiance in W/m2 for average, colder and warmer climate conditions;

Average daytime temperature in °C for average, colder and warmer climate conditions and average global solar irradiance in W/m2

| — | Hourly values for global solar irradiance according to an appropriate CEC test reference year; |
| --- | --- |

—

Hourly values for global solar irradiance according to an appropriate CEC test reference year;

| — | Mains water temperature: 10 °C; |
| --- | --- |

—

Mains water temperature: 10 °C;

| — | Ambient temperature of the store (buffer inside: 20 °C, buffer outside: ambient temperature); |
| --- | --- |

—

Ambient temperature of the store (buffer inside: 20 °C, buffer outside: ambient temperature);

| — | Auxiliary electricity consumption: by declaration; |
| --- | --- |

—

Auxiliary electricity consumption: by declaration;

| — | Auxiliary set temperature: by declaration and with a minimum value of 60 °C; |
| --- | --- |

—

Auxiliary set temperature: by declaration and with a minimum value of 60 °C;

| — | Auxiliary heater time control: by declaration. |
| --- | --- |

—

Auxiliary heater time control: by declaration.

Annual heat demand: 0,6 × 366 × (Qref
  - 1,09)

Qref

Where:

| — | 0,6 represents a factor to calculate the average heat demand from the load profile; |
| --- | --- |

—

0,6 represents a factor to calculate the average heat demand from the load profile;

| — | 1,09 represents the average distribution losses. |
| --- | --- |

—

1,09 represents the average distribution losses.

The auxiliary electricity consumption Qaux
  is calculated as follows:

Qaux

Qaux
  = (solpump × solhrs + solstandby × 24 × 365)/1000

Qaux

solpump

solstandby

Where

| — | solhrs is the number of active solar hours in h; with |
| --- | --- |

—

solhrs is the number of active solar hours in h; with

| — | solhrs = 2 000 for solar water heaters. |
| --- | --- |

—

solhrs = 2 000 for solar water heaters.

For the purpose of establishing the total energy efficiency performance of solar-only system and conventional water heater or of a solar water heater, the SOLICS method determines the annual non-solar heat contribution Qnonsol
  in kWh in terms of primary energy and/or kWh in terms of GCV as follows:

Qnonsol

GCV

| — | For solar-only systems: |
| --- | --- |

—

For solar-only systems:

Qnonsol =0,6 × 366 × (Qref +1,09) - QL

Qnonsol

Qref

Where:

| — | QL is the heat delivered by the solar heating system in kWh/a. |
| --- | --- |

—

QL is the heat delivered by the solar heating system in kWh/a.

| — | For solar water heater: |
| --- | --- |

—

For solar water heater:

Qnonsol = Qaux,net

Qnonsol

aux,net

Where:

—

Qaux,net

4.9.   Storage tank test procedures

(a)   Standing loss

The standing loss S of storage tanks can be assessed using any of the methods referenced in point 3, including the standing loss of the solar storage tank psbsol. Where the measurement results from the applicable standards are expressed in kWh/24 hours, the result will be multiplied by (1 000/24) to arrive at values for S in W. For the specific standing loss – per degree of temperature difference between store and ambient — of solar storage tanks psbsol, the heat loss can be determined in W/K directly by using EN 12977-3 or it can be found indirectly by dividing the heat loss in W by 45 (Tstore = 65 °C, Tambient = 20 °C) to arrive at a value in W/K. Where the results of EN 12977-3, expressed in W/K, are used for the assessment of S they are multiplied by 45.

S

S

S

(b)   Storage volume

The volume of the tank in a storage electric water heater is measured as stated in paragraph 4.5.c.

4.10.   Solar pump power test procedure

The solar pump power is rated as the electrical consumption under nominal operating conditions. Start-up effects under 5 minutes are disregarded. Solar pumps that are continuously controlled, or controlled in at least three steps, are rated as 50 % of the rated electrical power of the solar pump.

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(1)  It is intended that these transitional methods will ultimately be replaced by harmonised standard(s). When available, reference(s) to the harmonised standard(s) will be published in the Official Journal of the European Union in accordance with Articles 9 and 10 of Directive 2009/125/EC.

1

Official Journal of the European Union

(2)  Default value, if value is not determined calorimetrically. Alternatively, if volumetric mass and sulphur content are known (e.g. by basic analysis) the net heating value (Hi) may be determined with:

2

Hi = 52,92 - (11,93 × ρ15) - (0,3 -S) in MJ/kg

Hi

ρ15

S

(3)  EN15316-4-3, B based method

3

(4)  ISO 9459-5 based method

4

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