ISO 19967-1:2019

INTERNATIONAL ISO
STANDARD 19967-1
First edition
2019-03
Heat pump water heaters — Testing
and rating for performance —
Part 1:
Heat pump water heater for hot
water supply
Chauffe-eau à pompe à chaleur — Essais et classification des
performances —
Partie 1: Chauffe-eau à pompe à chaleur pour l'alimentation en
eau chaude
Reference number
©
ISO 2019
© ISO 2019
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Published in Switzerland
ii © ISO 2019 – All rights reserved

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms . 3
5 Installation requirements. 5
5.1 Test apparatus and uncertainties of measurement . 5
5.2 Test room for the outdoor heat exchanger of air source heat pump water heaters . 5
5.3 Installation and connection of the heat pump water heaters. 6
5.4 Installation of heat pump water heater consisting of several parts . 6
6 Settings and test conditions . 6
6.1 General . 6
6.2 Settings for non-ducted air source units . 6
6.3 Setting the external static pressure difference for ducted air source units . 7
6.4 Test conditions . 7
6.4.1 General test conditions . 7
6.4.2 Additional test conditions . 7
7 Performance test and determination of the energy consumption . 9
7.1 General . 9
7.2 Basic principles. 9
7.3 Off-peak products .10
7.4 Power input corrections .11
7.4.1 Power input of fans for heat pump water heater with duct connection .11
7.5 Stabilization [stage A] .12
7.6 Filling and storage [stage B] .12
7.7 Filling and heating up period [stage C] .12
7.8 Standby power input [stage D] .13
7.9 Water draw-offs and COP calculation [stage E] .13
7.9.1 Determination of the useful energy content .13
7.9.2 Determination of the energy consumption .15
7.9.3 Coefficient of performance (COP ) .16
HW
7.10 Reference hot water temperature and volume of mixed water at 40 °C [stage F] .16
7.11 Units with smart control . .17
7.12 Temperature operating range .17
8 Test results and test report .17
8.1 Data to be recorded .17
8.2 Test report .18
8.2.1 General information .18
8.2.2 Main results .19
9 Marking .19
Annex A (normative) Load profiles .20
Annex B (informative) Determination of the smart control factor SCF .22
Annex C (informative) Temperature operating range .28
Bibliography .30
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
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ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).
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.org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 86, Refrigeration and air-conditioning,
Subcommittee SC 6, Testing and rating of air-conditioners and heat pumps.
A list of all parts in the ISO 19967 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/members .html.
iv © ISO 2019 – All rights reserved

INTERNATIONAL STANDARD ISO 19967-1:2019(E)
Heat pump water heaters — Testing and rating for
performance —
Part 1:
Heat pump water heater for hot water supply
1 Scope
This document specifies test conditions and test procedures for determining the performance
characteristics of air source heat pump water heaters for hot water supply with electrically driven
compressors with or without supplementary electric heater and connected to or including only one
hot water storage tank. Hot water storage tanks that are connected in series or parallel and behave
hydronically as one single tank are considered as one hot water storage tank. In the case of heat pump
water heaters consisting of several parts with refrigerant or water connections, this document applies
only to those designed and supplied as a complete package.
NOTE This document is not applicable to testing procedures for simultaneous operation for hot water supply
and space heating. “Simultaneous” means that hot water supply and space heating generation occur at the same
time and may interact.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:/ /www. iso. org/obp
— IEC Electropedia: available at http:/ /www.e lectropedia. org/
3.1
heat pump water heater for hot water supply
air source heat pump water heater with electrically driven compressors with or without
supplementary electrical heater and connected to or including a hot water storage tank for hot water
supply for human use
3.2
hot water supply
water heated for human use or household or similar purposes
3.3
storage volume
V
m
measured volume of hot water that can be contained in the storage tank
3.4
non heated space air
heat source for a heat pump which absorbs heat by an air heat exchanger in direct contact with the air
inside a space in a building which is not heated
3.5
coefficient of performance for hot water supply
COP
HW
coefficient of performance which is determined by the use of reference load profiles and which includes
the heat losses of the storage tank
3.6
reference hot water temperature
θ'
WH
temperature determined as the mean temperature value of the average temperatures during one single
draw-off which ends when the hot water temperature is below 40 °C
3.7
volume of mixed water at 40 °C
V
volume 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 heat pump water heater
3.8
off-peak product
heat pump water heater that is energised for a maximum period of eight consecutive hours between
22:00 and 07:00 of the 24-h tapping pattern
3.9
load profile
given sequence of water draw-offs
Note 1 to entry: See Annex A.
3.10
water draw-off
given combination of useful water flow rate, useful water temperature, useful energy content and
target temperature
3.11
useful water flow rate
f(t)
minimum flow rate for the draw-off of the load profile
3.12
useful water temperature
T
m
minimum hot water temp
...