IEC 62552-3:2015/AMD1:2020

IEC 62552-3 ®
Edition 1.0 2020-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
A MENDMENT 1
AM ENDEMENT 1
Household refrigerating appliances – Characteristics and test methods –
Part 3: Energy consumption and volume

Appareils de réfrigération à usage ménager – Caractéristiques et méthodes
d'essai –
Partie 3: Consommation d'énergie et volume

IEC 62552-3:2015-02/AMD1:2020-11(en-fr)

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IEC 62552-3 ®
Edition 1.0 2020-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
A MENDMENT 1
AM ENDEMENT 1
Household refrigerating appliances – Characteristics and test methods –

Part 3: Energy consumption and volume

Appareils de réfrigération à usage ménager – Caractéristiques et méthodes

d'essai –
Partie 3: Consommation d'énergie et volume

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 97.030 ISBN 978-2-8322-9068-2

– 2 – IEC 62552-3:2015/AMD1:2020
© IEC 2020
FOREWORD
This amendment has been prepared by subcommittee 59M: Performance of electrical household
and similar cooling and freezing appliances, of IEC technical committee 59: Performance of
household and similar electrical appliances.
The text of this amendment is based on the following documents:
FDIS Report on voting
59M/128/FDIS 59M/134/RVD
Full information on the voting for the approval of this amendment can be found in the report on
voting indicated in the above table.
The committee has decided that the contents of this amendment and the base publication will
remain unchanged until the stability date indicated on the IEC website under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
_____________
5.1 General
Replace the NOTE with the following new content:
NOTE Refer to the requirements in Annex B of IEC 62552-1:2015 and IEC 62552-1:2015/AMD1:2020 for variable
temperature compartments. For energy testing, these are operated on the function (continuous temperature
operating range) that uses the most energy.

9 Test report
Replace the existing content with the following new content:
A test report should be prepared that includes all of the relevant information listed in Annex F of
IEC 62552-1:2015/AMD:2020 for tests undertaken in accordance with this document.

© IEC 2020
A.1 General
Replace the fourth paragraph with the following new content:
The refrigerating appliance shall have air temperature sensors installed at the positions
specified in Annex D of IEC 62552-1:2015 and IEC 62552-1:2015/AMD1:2020. The
determination of compartment air temperature during energy testing shall be as specified in
Annex D of IEC 62552-1:2015 and IEC 62552-1:2015/AMD1:2020.

A.2.6.1 General
Replace the fourth paragraph with the following new content:
Where the ice storage space occupies a complete compartment, the temperature sensor
placements shall be in accordance with Annex D of IEC 62552-1:2015 and
IEC 62552-1:2015/AMD1:2020 (not A.2.6.5 of this document).

A.2.6.5 Position of the temperature sensor in automatic icemakers
Replace the first sentence of the first paragraph with the following:
An automatic icemaker bin shall have a single temperature sensor located in the
position specified as follows for all energy tests:

B.4.3 Case SS2 calculation of values
Replace Formula (13) with the following new formula:
ΔTh
dfj−i
TT( )− (13)

SS2−i av−endX−endY−i
(tt− )

end−−Y end X

Replace the definition of ∆Th with:
df-i
∆Th is the accumulated temperature difference over time in each compartment i in Kh
dfj-i
as determined in accordance with C.3.3 for the defrost and recovery period j
commencing at the end of period X
Replace Formula (14) with the following new formula:
Rt −−Rt Δt
end−−Y end X drj
CRt = (14)
SS2
(tt− )
end−−Y end X
Replace the definition ∆t of with:
dr
∆t is the additional compressor run time in h as determined in accordance with C.3.3
drj
for the defrost and recovery period j commencing at the end of period X

=
– 4 – IEC 62552-3:2015/AMD1:2020
© IEC 2020
C.3.3 Case DF1 calculation of values
Add the following new content below the NOTE:
During a load processing efficiency test, it is possible that one or more defrosts occur for
which a correction must be made. This correction is based on splitting the defrost and recovery
energy in a fixed part and the energy used by the defrost heater:
Fixed defrost adder: ∆E = ∆E − E (63)
df-adderj dfj df-heaterj
where:
E is the measured defrost heater energy during the defrost and recovery period j,
df-heaterj
expressed in Wh
NOTE This formula is applied to each valid defrost during steady state. A representative value for the fixed defrost
adder (∆E ) is determined in accordance with Formula (64) and is subsequently used in the evaluation of a load
df-adder
processing test [using Formula (51) or, if multiple defrost systems are present, Formula (65)].
C.4 Number of valid defrost and recovery periods
At the end of the clause, add the following note:
NOTE The defrost heater energy E and incremental defrost and recovery energy ∆E for new appliances and
df-heaterj dfj
appliances that have not been operated for some time may be initially low until the defrost heater energy stabilises.
C.5 Calculation of representative defrost energy and temperature
Replace Formula (22) with the following new formula:
m
ΔE
∑ dfj
j=1
ΔE = F (22)
df df
m
Add the following text below the line ∆E :
dfj
F is a regional scaling factor that can be used to compensate for frost load and usage factor,
df
which impacts the defrost intervals. The default value for F is 1,0.
df
Add the following paragraph above Formula (23):
To correct a load processing efficiency test where one or more defrosts occurs, a
representative value for the fixed defrost adder is defined:
m
ΔE
∑ df−adderj
j=1
ΔE = (64)
df−adder
m
D.2 Elapsed time defrost controllers
Replace NOTE 2 with the following new note:
NOTE 2 The same timers could be used as compressor run time controllers or as elapsed time controllers,
depending on how they are configured in the refrigerating appliance.

© IEC 2020
D.3 Compressor run time defrost controllers
Replace the entire clause with the following:
D.3 Compressor run time defrost controllers
For these controllers, the defrost interval is defined by the compressor run time (or on time in
hours) (or, in some cases, the compressor run time plus the maximum time allocated for defrost
heater operation). These controllers are only applicable to single-speed compressors. The
defrost interval is therefore approximately inversely proportional to the total heat load on the
refrigeration system (ambient temperature and user loads plus any internal heat loads). The
most common defrost run time controllers range from 6 h to 12 h of compressor run time.
Typically, this would result in defrost intervals of the order of 12 h to 30 h (elapsed time) at
elevated ambient temperatures and somewhat longer defrost intervals at lower ambient
temperatures.
NOTE 1 The same timers could be used as compressor run time controllers or as elapsed time controllers,
depending on how they are configured in the refrigerating appliance.
If the run time controller is not accessible (or where it is not clear whether the controller is a run
time controller) or where the laboratory is not able to directly measure the controller operation
and does not know its run time, the value for the proxy run time shall be measured by testing as
set out below. Any routine energy tests or other tests may be used for this purpose.
Each measurement shall be undertaken over a whole defrost control cycle and tests shall be
undertaken in at least two different ambient temperatures in order to verify that it is a run time
controller and to estimate the value of t . The period selected shall comply with the following
prt
requirements:
• the first defrost shall qualify as a valid defrost as specified in Clause C.3;
• the test period shall include at least part of the subsequent defrost and recovery period
that is initiated automatically without any intervention (defrost heater on).
The estimated proxy run time of the compressor run time defrost controller for a given set of
test data that complies with these requirements is given by:
t = t + t (25)
prtj crtj dhj
where
t is the estimated proxy run time of the compressor run time defrost controller for the test
prtj
period starting with defrost and recovery period j in h;
t is the measured compressor run time in h from the initiation of defrost heater operation
crtj
for defrost and recovery period j to the initiation of defrost heater operation for the
subsequent defrost and recovery period j + 1;
is the time from the start of the defrost heater on until the compressor restarts, in h,
t
dhj
during defrost and recovery period j where the timer advances during the heater
operation; otherwise, a value of zero if the timer does not advance during the heater
operation.
NOTE 2 A common configuration is that the defrost heater is allocated a fixed maximum time of operation in the
timer defrost controller (say 20 min). Th
...