Electric instantaneous water heaters - Part 2-1: Methods for measuring the performance - Multifunctional electric instantaneous water heaters

This European Standard applies to electrical instantaneous water heaters designed to operate as multifunctional appliances with electric rated power >2 kW. This European Standard specifies tests for the assessment of the performance.

Elektro-Durchfluss-Wassererwärmer - Teil 2-1: Verfahren zur Messung der Gebrauchseigenschaften - Multifunktionelle Elektro-Durchfluss-Wassererwärmer

Diese Europäische Norm gilt für Elektro-Durchfluss-Wassererwärmer, die als Multifunktionsgeräte mit einer elektrischen Bemessungsleistung von > 2 kW betrieben werden sollen. Diese Europäische Norm legt Prüfungen für die Beurteilung der Gebrauchseigenschaften fest.

Chauffe-eau électriques instantanés - Partie 2-1: Méthodes de mesure de l’aptitude à la fonction - Chauffe-eau électriques instantanés multifonctions

Električni pretočni grelniki vode - 2-1. del: Metode za merjenje lastnosti - Večfunkcijski električni pretočni grelniki vode

Ta evropski standard se uporablja za električne pretočne grelnike vode, ki so zasnovani za delovanje kot večfunkcijske naprave z nazivno električno močjo > 2 kW.
Ta evropski standard določa preskuse za oceno zmogljivosti.

General Information

Status
Published
Publication Date
12-May-2016
Current Stage
6060 - Document made available
Due Date
13-May-2016
Completion Date
13-May-2016

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Standards Content (sample)

SLOVENSKI STANDARD
SIST EN 50193-2-1:2016
01-julij-2016
(OHNWULþQLSUHWRþQLJUHOQLNLYRGHGHO0HWRGH]DPHUMHQMHODVWQRVWL
9HþIXQNFLMVNLHOHNWULþQLSUHWRþQLJUHOQLNLYRGH

Electric instantaneous water heaters - Part 2-1: Methods for measuring the performance

- Multifunctional electric instantaneous water heaters
Elektro-Durchfluss-Wassererwärmer - Teil 2 1: Verfahren zur Messung der
Gebrauchseigenschaften - Multifunktionelle Elektro-Durchfluss-Wassererwärmer

Chauffe-eau électriques instantanés - Partie 2-1: Méthodes de mesure de l’aptitude à la

fonction - Chauffe-eau électriques instantanés multifonctions
Ta slovenski standard je istoveten z: EN 50193-2-1:2016
ICS:
91.140.65 Oprema za ogrevanje vode Water heating equipment
97.100.10 (OHNWULþQLJUHOQLNL Electric heaters
SIST EN 50193-2-1:2016 en,fr

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 50193-2-1:2016
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SIST EN 50193-2-1:2016
EUROPEAN STANDARD EN 50193-2-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2016
ICS 91.140.65
English Version
Electric instantaneous water heaters - Part 2-1: Methods for
measuring the performance - Multifunctional electric
instantaneous water heaters

Chauffe-eau électriques instantanés - Partie 2-1: Méthodes Elektro-Durchfluss-Wassererwärmer - Teil 2 1: Verfahren

de mesure de l'aptitude à la fonction - Chauffe-eau zur Messung der Gebrauchseigenschaften -

électriques instantanés multifonctions Multifunktionelle Elektro-Durchfluss-Wassererwärmer

This European Standard was approved by CENELEC on 2016-03-28. CENELEC 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 CENELEC 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 CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the

same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,

Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,

Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN 50193-2-1:2016 E
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SIST EN 50193-2-1:2016
EN 50193-2-1:2016 (E)
Contents Page

European foreword ............................................................................................................................................. 4

1 Scope ..................................................................................................................................................... 5

2 Normative references ............................................................................................................................. 5

3 Terms and definitions ............................................................................................................................. 5

4 General test conditions .......................................................................................................................... 7

4.4 Test setup ............................................................................................................................................... 8

4.101 Time constants (measuring time) ........................................................................................................... 8

4.102 Test setup ............................................................................................................................................... 8

4.102.1 Measurement setup ............................................................................................................................ 8

4.102.2 Set points ............................................................................................................................................ 8

4.102.3 Measurement of flow pressure and flow rate ...................................................................................... 8

4.102.4 Temperature measurement ................................................................................................................ 8

5 Energy efficiency .................................................................................................................................... 8

6.101 Performance tests .................................................................................................................................. 8

6.101.1 General ................................................................................................................................................... 8

6.101.2 Determination of flow rates .................................................................................................................... 8

6.101.2.1 Introduction ......................................................................................................................................... 8

6.101.2.2 Electronically controlled or regulated appliances ................................................................................ 9

6.101.2.3 Hydraulically controlled appliances ..................................................................................................... 9

6.101.2.4 Determination of the flow rate as a function of the pressure difference ........................................... 10

6.101.3 Pressure difference on activation of the heating capacity ................................................................... 10

6.101.3.1 Introduction ....................................................................................................................................... 10

6.101.3.2 Electronically controlled or regulated appliances .............................................................................. 10

6.101.3.3 Hydraulically controlled appliances ................................................................................................... 10

6.101.4 Behaviour at switch-on of the appliance .............................................................................................. 11

6.101.4.1 Introduction ....................................................................................................................................... 11

6.101.4.2 Electronically controlled or regulated appliances .............................................................................. 11

6.101.4.3 Hydraulically controlled appliances ................................................................................................... 12

6.101.5 Behaviour following the change of the flow rate .................................................................................. 12

6.101.5.1 Introduction ....................................................................................................................................... 12

6.101.5.2 Electronically controlled or regulated appliances .............................................................................. 12

6.101.5.3 Hydraulically controlled appliances ................................................................................................... 13

6.101.6 Behaviour following interruption of the flow ......................................................................................... 14

6.101.6.1 Introduction ....................................................................................................................................... 14

6.101.6.2 Electronically controlled or regulated appliances .............................................................................. 14

6.101.6.3 Hydraulically controlled appliances ................................................................................................... 15

6.101.7 Behaviour at constant temperature setting .......................................................................................... 15

6.101.7.1 Introduction ....................................................................................................................................... 15

6.101.7.2 Electronically controlled or regulated appliances .............................................................................. 15

6.101.7.3 Hydraulically controlled appliances ................................................................................................... 16

6.101.8 Behaviour following the change of the temperature selector setting ................................................... 16

6.101.8.1 Introduction ....................................................................................................................................... 16

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SIST EN 50193-2-1:2016
EN 50193-2-1:2016 (E)

6.101.8.2 Electronically controlled appliances ................................................................................................. 16

6.101.8.3 Hydraulically controlled appliances ................................................................................................... 17

6.101.9 Behaviour at voltage limits ................................................................................................................... 17

7.101 Additional tests for electronic instantaneous water heaters ................................................................. 18

7.101.1 General ................................................................................................................................................. 18

7.101.2 Behaviour of the outlet temperature at decreasing water inlet temperature ........................................ 18

7.101.3 Behavior of the outlet temperature at changing water inlet temperature ............................................. 19

Annex A (normative) Load pattern .................................................................................................................. 20

Annex B (normative) Test setup ...................................................................................................................... 21

Annex ZZA (informative) Relationship between this European Standard and the energy labelling

requirements of Commission Delegated Regulation (EU) No 812/2013 aimed to be covered ........... 25

Annex ZZB (informative) Relationship between this European Standard and the ecodesign

requirements of Commission Regulation (EU) No 814/2013 aimed to be covered ............................. 26

Bibliography ...................................................................................................................................................... 27

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SIST EN 50193-2-1:2016
EN 50193-2-1:2016 (E)
European foreword

This document (EN 50193-2-1:2016) has been prepared by CLC/TC 59X "Performance of household and

similar electrical appliances".
The following dates are proposed:
• latest date by which this document has to be (dop) 2017-03-28
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) 2019-03-28
conflicting with this document have to
be withdrawn
This document is to be read in conjunction with EN 50193-1:2013.

Clauses, subclauses, notes, tables and figures which are additional to those in EN 50193-1:2013 are

numbered starting from 101.

This document has been prepared under a mandate given to CENELEC by the European Commission and

the European Free Trade Association, and supports essential requirements of EU Directive(s).

For the relationship with EU Directive(s) see informative Annex ZZA and ZZB, which are integral parts of this

document.
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SIST EN 50193-2-1:2016
EN 50193-2-1:2016 (E)
1 Scope
This clause of Part 1 is applicable with the following exception:

This European Standard applies to electrical instantaneous water heaters designed to operate as

multifunctional appliances with electric rated power >2 kW.
This European Standard specifies tests for the assessment of the performance.
2 Normative references
This clause of Part 1 is applicable with the following exception:
Addition:

EN 50193-1:2013, Electric instantaneous water heaters - Part 1: General requirements

3 Terms and definitions
This clause of Part 1 is applicable with the following exceptions:
Addition:
3.101
setpoint value

changeable value which is allocated to the appliance or the individual components thereof

3.102
flow pressure on activation of the heating capacity

pressure drop in the instantaneous water heater, at which the heating capacity is, and remains, activated

3.103
90% method

usually a physical value is reaching a final (average) value in an asymptotic manner. To reach a valid

measurement result, a stop point of the measurement has to be defined. The measurement is stopped, if the

value finally has reached 90% of the difference between (average) starting value and (average) final value

3.104
10%/90% method

usually a physical value is changing with a time delay in an asymptotic manner between starting value and

final value. To reach a valid measurement result, a starting point and a stop point have to be defined for the

measurement. The measurement is started, if the physical value has first reached 10% of the difference

between (average) starting value and (average) final value. The measurement is stopped, if the value finally

has reached 90% of the difference
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SIST EN 50193-2-1:2016
EN 50193-2-1:2016 (E)
Figure 101
3.105
response time

time interval between the beginning of the changing of a value or parameter and the moment a steady state

condition has obtained. The 90% method has to be used
3.106
volume flow rate/water flow rate
flow rate of water expressed in l/min
3.107
heating-up duration

time interval between the opening of the withdrawal device and the final outlet temperature is obtained. The

90% method has to be used for
3.108
pressure difference

difference between pressure at water inlet and water outlet of the appliance at a defined flow rate

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SIST EN 50193-2-1:2016
EN 50193-2-1:2016 (E)
After Clause 3, add the following new clause:
101 Symbols and units
For the purposes of this document, the following symbols and units apply.
Table 101 – Symbols and units
Symbol Unit Explanation

T °C The minimum setting of the temperature setting mechanism settable by user at which the

min
appliance does heat.

If no user accessible temperature selector is available, the relevant measurements with

T are not performed.
min

T °C Standard hot water temperature set point for various tests: 38°C. If the temperature setting

mechanism settable by user does not permit an outlet temperature setting of 38 °C, a

temperature as close as possible above 38°C as possible shall be chosen. This
temperature shall be stated in the test report and shall be used for any further
measurements, instead of 38 °C.

The positions of the temperature setting mechanism shall be marked for reproducible

settings, taking into consideration the fact that T settings may dependent on the direction

of the rotation of a knob.

If no user accessible temperature selector is available, the temperature factory setting is

defined to be the T .setting.

T °C The maximum setting of the temperature setting mechanism settable by the user.

max

If no user accessible temperature selector is available, the relevant measurements with

T are not performed.
max

pmin °C Temperature at the minimum permanent setting of the power selector settable by user at

which the appliance does heat.

If no user accessible power selector is available, the relevant measurements with T are

pmin
not performed.

pmax °C Temperature at the maximum permanent setting of the power selector settable by user.

If no user accessible power selector is available, the temperature factory setting is defined

to be the T setting.
pmax

ℓ/min The flow-rate where the power consumption is 90% of rated power at T and an inlet-

 38
90%P .
temperature of 15 °C
factor

V . The correction value for 90%P if the inlet temperature differs by more than 1K from 15 °C

T °C Temperature from which counting of useful energy content starts
p °C Minimum (peak) temperature to be achieved during tapping
T °C Cold water inlet temperature
cold
l/min Minimum flow rate to be reached during tapping
P kW Minimum required instantaneous heating power to fulfil tapping
min
d second Tapping duration
P kW Minimum requited heating power of the appliance
real
nom kW Nominal heating power of the appliance
Q kWh Nominal daily energy consumtion of the appliance
nom
r kWh Real daily energy consumtion of the appliance
4 General test conditions
This clause of Part 1 is applicable with following exceptions:
Modification:

The cold water temperature T shall be 15 °C ± 5 K for the performance tests according to Clause 102ff.

cold
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SIST EN 50193-2-1:2016
EN 50193-2-1:2016 (E)
4.4 Test setup
This subclause of Part 1 is not applicable.
Addition:
4.101 Time constants (measuring time)
Time constants shall be determined by means of the 10/90 % method.
4.102 Test setup
4.102.1 Measurement setup
The appliance shall be fixed in accordance with the installation instructions.

The measurement setup shall correspond to Figure B.101 for open-outlet appliances (single point) and to

Figure B.102 for closed-outlet (multi point) appliances.
4.102.2 Set points
Unless no specific setpoints for the individual test are defined:

All non-user adjustable setpoints shall be adjusted according to manufacturer instructions for a standard

setup.
User adjustable selectors have to be set as follows:

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

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

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

– All other selectors shall be set according to manufacturer instructions.
4.102.3 Measurement of flow pressure and flow rate

Flow pressure and flow rate shall be measured in accordance to Annex B. Flow pressure shall be

determined by measuring the pressure difference.
4.102.4 Temperature measurement

The inlet and outlet temperatures of the water shall be measured using the setup according to Annex B.

5 Energy efficiency
This clause of Part 1 is applicable.
Addition:
6.101 Performance tests
6.101.1 General

Smart Instantaneous water heater shall be measured as “Electronically controlled or regulated appliances”

all other appliances are measured as “Hydraulically controlled appliances”.
6.101.2 Determination of flow rates
6.101.2.1 Introduction

The purpose of this test is to determine reference values for further measurements.

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SIST EN 50193-2-1:2016
EN 50193-2-1:2016 (E)
6.101.2.2 Electronically controlled or regulated appliances

The appliance is operated under the boundary conditions of EN 50193-1:2013, Table 1.

Set flow rate to V
90%P

– Closed outlet appliances: The water pressure difference shall be increased up to the half of the nominal

pressure of the appliance, if necessary. If the flow rate V cannot be obtained, the flow rate at

90%P

pressure difference of half nominal pressure of the appliance is defined to be 100 %.

– Open outlet appliances: 0,1 MPa is the maximum useable pressure. If the flow rate V cannot be

90%P

obtained, the flow rate at a pressure difference of 0,1 MPa is defined to be 100 %

If the Inlet temperature deviates more than 1 K from 15 °C, a correction factor K has to be included:

ϑ −T
in,real 38
K = .
15°−CT
The ⩒ value will be corrected to
90%P
⩒ * K ≙ 100%
90%P ⩒

Both, the outlet-temperature T and V shall be stated in the test report and shall be used for any further

90%P
measurements.
Table 102 – Nominal values for electronically controlled or regulated appliances
rated 90% Τ T  
in,real 38
K .
V . VK* ≙ 100%
90%P V 90%P
power rated
power
nominal pressure pressure
Flow rate ≙ 100% [l/min]
difference
6.101.2.3 Hydraulically controlled appliances

The flow-rate shall be increased until the outlet temperature reaches the value of 38 °C. If this flow rate is not

to be obtained, the water pressure shall be increased until the pressure difference has reached the half of

the nominal pressure of the appliance. For single point appliances 0,1 MPa is the maximum pressure to be

increased.
Nominal values have to be determined and recorded.
This value is taken to be 100 %.
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SIST EN 50193-2-1:2016
EN 50193-2-1:2016 (E)
Table 103 – Nominal values for hydraulically controlled appliances
P T T
nom out in
VK* ≙ 100%
90%P
nominal pressure pressure difference Flow rate ≙ 100% [l/min]

6.101.2.4 Determination of the flow rate as a function of the pressure difference

The flow rates shall be determined at pressure differences given in Table 104 and in Table 105. All flow

limiting devices shall be fully opened. The measurement shall be carried out without supply voltage.

Table 104 – Flow pressure and flow rate for multi point appliances
Pressure difference Flow rate
MPa l/min
0,1
0,2
0,3
Table 105 – Flow pressure and flow rate for single point appliances
Pressure difference Flow rate
MPa l/min
0,025
0,05
0,1
6.101.3 Pressure difference on activation of the heating capacity
6.101.3.1 Introduction

The purpose of this test is to measure the minimum pressure difference at the installation site, to ensure a

failure-free continuous operation of the appliance.
6.101.3.2 Electronically controlled or regulated appliances
The temperature selector shall be set to the temperature setting T

The flow rate shall be steadily increased until the heating capacity is activated. The required pressure

difference and the associated flow rate shall be given in Table 106.
Table 106 – Pressure difference and flow rate
Outlet temperature Pressure difference Flow rate Power
°C MPa l/min kW
6.101.3.3 Hydraulically controlled appliances

The pressure difference shall be steadily increased until the heating capacity is activated or switched over

and remains permanently activated. The necessary flow pressure and the corresponding flow rate shall be

determined.

These measurements shall be carried out with the minimum (T ) and the maximum (T ) permanent

pmin pmax
settings of the power and temperature selector which can be set by the user.
The pressure difference and the flow rate shall be given in Table 107.
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SIST EN 50193-2-1:2016
EN 50193-2-1:2016 (E)
Table 107 – Pressure difference and flow rate
Outlet temperature Pressure difference Flow rate Power
°C MPa l/min kW
Pmin
Pmax
6.101.4 Behaviour at switch-on of the appliance
6.101.4.1 Introduction

The purpose of this test is to determine the behaviour of the appliance following the opening of the

withdrawal device until stationary temperature values are obtained.
The withdrawal device has to be opened within 0,5 seconds.
6.101.4.2 Electronically controlled or regulated appliances

Prior to and between the measurements a flow rate shall be set at which the appliance does not switch on.

The flow rate shall be maintained until the inlet and the outlet temperatures do no longer differ by more than

2 K. Following this the flow shall be interrupted.

The hydraulic conditions for a flow rate setting of 50 %, 75 % and 100 % shall be determined for the

temperature selector setting T . These hydraulic conditions shall be also used for measurements applying

T and T The functioning of automatically flow-rate limiting devices shall not be interfered with. The

min max
actual determined flow rate values are entered into Table 108.
The heating-up duration starts as soon as the withdrawal device is opened.

If steady state condition has been reached, the measurement is continued for at least 1 additional minute to

determine the respective temperature mean value.

The heating-up duration is considered as complete once the water outlet temperature has reached the mean

value -1K.
The values shall be entered into Table 108.

Table 108 – Behaviour at switch-on of the appliance at different temperature selector settings

Temperature Flow rate flow-rate Heating-up Outlet
selector setting duration temperature,
l/min
setting actual value
% seconds
min
100
100
max
100
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SIST EN 50193-2-1:2016
EN 50193-2-1:2016 (E)
6.101.4.3 Hydraulically controlled appliances

Prior to and between the measurements a flow rate shall be set at which the appliance does not switch on.

The flow rate shall be maintained until the inlet and the outlet temperatures do no longer differ by more than

2 K. Following this the flow shall be interrupted.

The heating-up duration starts as soon as the withdrawal device is opened. First of all wait until the

temperature reaches steady state, then measure for at least another minute in order to determine the mean

value.
The response time is determined by using the 10%/90% method
The missing data shall be entered into Table 109.
Table 109 – Behaviour at switch-on of the appliance at different settings
Temperature selector Flow rate setting Heating-up duration Outlet temperature,
setting (according to 102.1.2) actual value
seconds
l/min
Pmin
Pmax
6.101.5 Behaviour following the change of the flow rate
6.101.5.1 Introduction

The purpose of this test is to determine the behaviour of the appliance at varying flow rates.

The changeover of the flow rates shall be done in less than 0,5 seconds.
6.101.5.2 Electronically controlled or regulated appliances

Following increasing or decreasing the flow rate, the response time and the temperature deviation of the

water outlet temperature shall be determined as a function of the temperature selector setting.

Both before and after the flow rate was changed, wait until the temperature reaches steady state, then

measure for at least another minute in order to create a mean value of the temperature before and after

changing the flow-rate. From the temperature profile occurring after steady state has been reached the

respective mean value of the outlet temperature shall be determined. If these mean values of the

temperature at both different flow-rates differ by more than 1 K from each other, then no value shall be

indicated for the response time. For the maximum temperature selector setting the admissible deviation is

2 K.

The hydraulic conditions for a flow rate setting of 50 %, 75 % and 100 % shall be determined for the

temperature selector setting T (automatically operating flow-rate limiting devices should be in position “fully

open”). These hydraulic conditions shall also be used for measurements applying T . The functioning of

max

automatically flow-rate limiting devices shall not be affected by. The actual determined flow rate values are

entered into Table 110.

The response time starts if the water outlet temperature leaves the mean value by more than ± 1 K (+-2K at

maximum temperature selector setting) and ends when this temperature enters the new mean value with 1K

deviation (+-2K at maximum temperature selector setting).

The temperature deviation shall be given in the form of both the maximum positive and the maximum

negative deviations of the water outlet temperature from the mean value after having changed the flow rate,

occurring during response time.
The data shall be entered into Table 110.
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SIST EN 50193-2-1:2016
EN 50193-2-1:2016 (E)
Table 110 – Behaviour following the change of the flow rate
at different temperature selector settings
Temperatur Flow rate Temperature Response Outlet
e selector deviation during time
temperatur
setting response time
steady
steady
state state
l/min + − Second
100 % - - -
75%
100%
50%
100%
100% - - -
75%
100%
max
50%
100 %
6.101.5.3 Hydraulically controlled appliances
...

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