EN 50193-1:2013

SLOVENSKI STANDARD
01-julij-2013
1DGRPHãþD
SIST EN 50193:1998
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Electric instantaneous water heaters -- Part 1: General requirements
Elektrische Durchfluss-Durchflusserwärmer -- Teil 1: Allgemeine Anforderungen
Chauffe-eau électriques instantanés -- Partie 1: Exigences générales
Ta slovenski standard je istoveten z: EN 50193-1:2013
ICS:
91.140.65 Oprema za ogrevanje vode Water heating equipment
97.100.10 (OHNWULþQLJUHOQLNL Electric heaters
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 50193-1
NORME EUROPÉENNE
March 2013
EUROPÄISCHE NORM
ICS 91.140.65 Supersedes EN 50193:1997

English version
Electric instantaneous water heaters -
Part 1: General requirements
Chauffe-eau électriques instantanés -  Elektrische Durchfluss-
Partie 1: Exigences générales Durchflusserwärmer -
Teil 1: Allgemeine Anforderungen

This European Standard was approved by CENELEC on 2012-11-05. 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.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2013 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50193-1:2013 E
Contents
Page
Foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 General test conditions . 6
4.1 Test conditions and tolerances on the test results . 6
4.2 Number of appliances to be tested . 7
4.3 General measurement conditions . 7
4.4 Test setup . 7
5 Energy efficiency . 7
5.1 Test methods . 7
5.2 Setpoints . 8
5.3 Static efficiency . 8
5.4 Start up losses . 8
5.5 Smart control compliance . 9
5.6 Calculation of energy demand . 9
5.7 Correction factor . 9
Annex A (normative) Load pattern . 10
Annex B (normative) Test setup . 14
Bibliography . 18

- 3 - EN 50193-1:2013
Foreword
This document (EN 50193-1:2013) has been prepared by CLC/TC 59X "Performance of household and
similar electrical appliances".

The following dates are fixed:

• latest date by which this document has to be (dop) 2013-11-05
implemented at national level by publication of
an identical national standard or by
endorsement
(dow) 2015-11-05
• latest date by which the national standards
conflicting with this document have to
be withdrawn
This document supersedes EN 50193:1997.

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

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent rights.

1 Scope
This European Standard applies to electric instantaneous water heaters for domestic hot water heating for
household and similar applications, which show both of the following characteristics:
– fulfilling at least one load pattern from Annex A;
– heating up to temperatures below the boiling temperature.
This European Standard specifies terms, definitions and measurement methods for the assessment of energy
efficiency.
This European Standard does not take into account requirements regarding the safety of the appliances.
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 ISO 228-1, Pipe threads where pressure-tight joints are not made on the threads — Part 1: Dimensions,
tolerances and designation (ISO 228-1)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
instantaneous water heater
appliance intended to heat water while it flows through the appliance
3.1.1
electric instantaneous water heater
electric powered instantaneous water heater, independent from the kind of the controller system
3.1.2
closed instantaneous water heater
instantaneous water heater intended to operate at the pressure of the water system, the flow of water being
controlled by one or more valves in the outlet system
3.1.3
open-outlet instantaneous water heater
instantaneous water heater in which the flow of water is controlled by a valve in the inlet pipe, there being no
valve in the outlet pipe
3.1.4
hydraulic instantaneous water heater
instantaneous water heater each of whose heating elements can be switched on or off, depending on the
water flow rate or water pressure
3.1.5
instantaneous water heater with manual variable power setting
instantaneous water heater where the heating power can be manually and variably set by the user
3.1.6
electronically controlled instantaneous water heater
instantaneous water heater with electronically controlled heating elements, where the outlet water temperature can
be controlled by varying the power consumed by the heating elements without affecting the flow rate or mixing with cold
water. The outlet water temperature is not thermostatically regulated and will change as a result in a change in flow or inlet
water temperature (no feedback from outlet temperature and/or flow rate)

- 5 - EN 50193-1:2013
3.1.7
electronically regulated instantaneous water heater
instantaneous water heater with electronically controlled heating elements, where the outlet water
temperature can be controlled by varying the power consumed by the heating elements without affecting the
flow rate or mixing with cold water. The outlet water temperature is thermostatically regulated and will not
change significantly as a result in a change in flow or inlet water temperature (with feedback from outlet
temperature and/or flow rate)
3.1.8
electronic instantaneous water heater
electronically controlled instantaneous water heater or electronically regulated instantaneous water
heater
3.2
temperature selector
actuator which presets the temperature set point value of the water outlet and which can be adjusted by the
user
3.3
temperature control
actuator which adjusts the temperature of the outlet water by means of varying the flow of water through the
appliance or by varying the power applied to the heater(s) or by a combination of the two
3.4
independent flow control
actuator which adjusts the flow of water through the appliance with no significant change in the outlet water
temperature
3.5
flow regulator
actuator which limits the flow of water through the appliance regardless of variations in line pressure
3.6
flow restrictor
device which defines a flow of water through the appliance for a set pressure
3.7
power selector
actuator which presets electrical power of the unit and which can be adjusted by the user
Note 1 to entry: The water outlet temperature depends on flow rate and/or inlet temperature.
3.8
power limiter
actuator which presets the maximum electrical power consumed by the unit and which can be adjusted during
installation
Note 1 to entry: The outlet temperature and the flow rate can to a large extent be set independently of each other.
3.9
heating-up duration
time interval between the opening of the withdrawal device and the moment when the final outlet temperature
is obtained
3.10
response time
time interval between the beginning of the change in the setting of the temperature selector or the flow rate, or
after the flow rate was interrupted, and the moment the final outlet temperature is obtained
3.11
theoretical net energy demand
physical energy demand which is calculated from flow rate, temperature difference and duration of the water
withdrawal
3.12
measured energy demand
energy demand resulting from measurements
3.13
rating data
characteristics assigned to the appliance by the manufacturer
3.14
load profile/load pattern
a means of illustrating the power consumption of an instantaneous water heater over a 24 hour period
3.15
daily profile
defined withdrawals effected during one day
3.16
pressure switch
switch that operates in response to a change in pressure
3.17
flow switch
switch that operates in response to a flow of water
3.18
smart control
system that can demonstrate a reduction in energy consumption
3.19
multifunctional appliance
appliance designed to supply various outlets where the outlet configuration is defined by the installer
3.20
usable water
water at or above the temperature T for the relevant draw-off and load pattern specified in the tables of
m
Annex A
4 General test conditions
4.1 Test conditions and tolerances on the test results
Unless otherwise specified, the table below gives additional test conditions and tolerances on the test results
(i.e. thermal energy).
- 7 - EN 50193-1:2013
Table 1  Test conditions and test results  Setting values and tolerances
Measurement parameters Unit Value Acceptable Acceptable deviation Measurement Remarks
deviation of the individual uncertainty
(mean value) measurement values (accuracy)
5)
Ambient temperature °C/K 20 °C ± 5 °C ± 2 K ± 2 K ± 1 K
2)
Time S  ± 0,1 s
Cold inlet water temperature
2) 1)
°C/K 10 °C ± 2 K ± 2 K ± 1 K
for energy efficiency
Hot outlet water temperature
1) 2)
°C/K Sample  ± 1 K
for energy efficiency
±0,1 l/min or
2) 4)
Flow rate l/min Sample
±1%
3)
Pressure Mpa  ± 5 %
2)
input power kW  ± 1 %
5)
Input power W  ± 1 %
2)
Voltage V  ± 2 %
2)
Current A  ± 0,5 %
1) Thermocouple with a diameter of maximum 0,5 mm, in midstream, positioned directly at the outlet and inlet of the appliance.
2) The measured values shall be expressed rounded to one decimal place.
3) The measured values shall be expressed rounded to three decimal places.
4) Whichever is higher.
5) The measured values shall be expressed rounded to integer.

4.2 Number of appliances to be tested
The tests shall be performed on a single appliance.
4.3 General measurement conditions
Unless otherwise specified, the appliance shall be installed commissioned and operated in accordance with
the information provided in the installation and operating instructions.
Commissioning procedures shall be repeated following a supply voltage interruption, if required by the
inst
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