EN 16905-4:2017

SLOVENSKI STANDARD
01-januar-2018
7RSORWQDþUSDONDVSOLQVNRJQDQLPPRWRUMHP]QRWUDQMLP]JRUHYDQMHPGHO
3UHVNXVQHPHWRGH
Gas-fired endothermic engine driven heat pumps - Part 4: Test methods
Gasbefeuerte endothermische Motor-Wärmepumpen - Teil 4: Prüfverfahren
Pompes à chaleur à moteur endothermique alimenté au gaz - Partie 4 : Méthodes
d'essai
Ta slovenski standard je istoveten z: EN 16905-4:2017
ICS:
27.080 7RSORWQHþUSDONH Heat pumps
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 16905-4
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2017
EUROPÄISCHE NORM
ICS 27.080
English Version
Gas-fired endothermic engine driven heat pumps - Part 4:
Test methods
Pompes à chaleur à moteur endothermique alimenté Gasbefeuerte endothermische Motor-Wärmepumpen -
au gaz - Partie 4 : Méthodes d'essai Teil 4: Prüfverfahren
This European Standard was approved by CEN on 9 January 2017.

CEN 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 CEN
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 CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 16905-4:2017 E
worldwide for CEN national Members.

Contents Page
European foreword . 5
1 Scope . 6
1.1 Scope of EN 16905 series . 6
1.2 Scope of EN 16905-4 . 6
2 Normative references . 7
3 Terms and definitions . 7
4 Test methods . 7
4.1 General . 7
4.2 Basic principles method of calculation for the determination of capacities . 7
4.2.1 Capacity. 7
4.2.2 Engine heat recovery capacity . 9
4.2.3 Heat input . 11
4.2.4 Electrical power input . 12
4.2.5 Gas utilization efficiency (GUE) . 16
4.2.6 Auxiliary energy factor (AEF) . 17
4.2.7 Engine heat recovery efficiency (EHRE) . 18
4.2.8 Primary energy factor (PER) . 19
4.3 Test apparatus. 19
4.3.1 Arrangement of the test apparatus. 19
4.3.2 Installation and connection of the appliance . 20
4.4 Uncertainties of measurement . 21
4.5 Test procedure . 23
4.5.1 General . 23
4.5.2 Non-cyclical operation . 26
4.5.3 Cyclical operation . 38
4.6 Test methods for electric power consumption during thermostat off mode, standby
mode and off mode . 42
4.6.1 Measurement of electrical power consumption during thermostat off mode . 42
4.6.2 Measurement of the electrical power consumption during standby mode . 42
4.6.3 Measurement of the electric power consumption during crankcase heater mode . 42
4.6.4 Measurement of the electric power consumption during off mode . 43
4.7 Test results — Data to be recorded . 43
5 Heat recovery test for air-cooled multisplit systems . 45
5.1 Test installation . 45
5.1.1 General . 45
5.1.2 Three-room calorimeter method . 45
5.1.3 Three-room air-enthalpy method . 45
5.1.4 Two-room air-enthalpy method . 45
5.2 Test procedure . 46
5.3 Test results . 46
6 Test report . 46
6.1 General information . 46
6.2 Additional information . 47
6.3 Rating test results . 47
Annex A (normative) Calorimeter test method . 48
A.1 General . 48
A.2 Transient heating capacity test . 51
A.3 Calibrated room-type calorimeter . 51
A.4 Balanced ambient room-type calorimeter . 52
A.5 Calorimeter and auxiliary equipment for water-cooled condenser tests . 52
A.6 Calculations-cooling capacities . 52
A.7 Calculations- heating capacities . 54
A.7.1 General . 54
Annex B (normative) Indoor air enthalpy test method . 57
B.1 General . 57
B.2 Test conditions . 57
B.3 Application . 57
B.4 Calculations-cooling capacities . 57
B.5 Calculations-heating capacities . 58
Annex C (normative) Symbols and units used in Annex A and B . 59
Annex D (normative) Water enthalpy test method . 61
D.1 General . 61
D.2 Calculations. 61
D.2.1 Measured cooling capacity . 61
D.2.2 Measured heating capacity. 61
D.2.3 Measured engine heat recovery capacity. 62
Annex E (normative) Direct method for air-to-water (brine) and water (brine)-to-water
(brine) appliances . 63
E.1 General . 63
E.2 Compensation system for air-to-water (brine) appliances . 63
E.3 Compensation system for water(brine) to water (brine) appliances . 64
Annex F (informative) Measurement control criteria for water (brine) to water (brine)
appliances. 65
F.1 General . 65
F.2 Water (brine)-to-water (brine) heat pump in heating mode . 65
F.3 Water (brine)-to-water (brine) chiller or chiller/heater in cooling mode . 66
Annex G (normative) Determination of the pump efficiency . 68
G.1 General . 68
G.2 Hydraulic power of the pump . 68
G.2.1 The pump is an integral part of the appliance . 68
G.2.2 The pump is not an integral part of the appliance. 68
G.3 Efficiency of the pump . 69
Annex H (informative) Calculation procedure for determination of GUE, AEF and Cd values . 71
H.1 Calculation procedure for determination of GUE values at part load (GUEPL). 71
H.1.1 General . 71
H.1.2 For air-to-air, brine-to-air and water-to-air units . 71
H.1.3 For air-to-water, water-to-water and brine-to-water units . 72
H.2 Calculation procedure for determination of AEF values at part load (AEFPL) . 72
H.2.1 General . 72
H.2.2 For air-to-air, brine-to-air and water-to-air units . 73
H.2.3 For air-to-water, water-to-water and brine-to-water units . 73
H.3 Air-to-air and water-to-air units - Determination of the degradation coefficient Cd . 74
H.3.1 General . 74
H.3.2 Air-to-air units – Cooling mode. 75
H.3.3 Air-to-air units – Heating mode . 75
H.3.4 Water-to-air units – Cooling mode . 75
H.3.5 Water-to-air units – Heating mode . 75
H.4 Air-to-water units and water-to-water units - Determination of the degradation
coefficient Cc . 75
Annex I (informative) “Individual” correction to include in the “global” electrical power
input correction depending on the GEHP appliance . 76
Annex J (informative) Heating capacity tests - Flow chart and examples of different test
sequences . 83
J.1 Flow chart . 83
J.2 Examples of test profiles . 84
Annex K (informative) Rating of indoor and outdoor units of multisplit and modular heat
recovery multisplit system . 89
K.1 General . 89
K.2 Terms and definitions . 89
K.3 Rating in indoor units . 89
K.3.1 General . 89
K.3.2 Air flow rate measurement . 90
K.3.3 Measurement of the power input of indoor units . 90
K.4 Rating of outdoor units . 90
K.4.1 General . 90
K.4.2 Test conditions . 90
K.4.3 Test procedure . 90
Annex L (informative) Air flow measurement . 91
L.1 General . 91
L.2 Test installation . 91

L.3 Test conditions . 91
L.4 Air flow measurement . 91
Annex ZA (informative) Relationship between this European Standard and the ecodesign
requirements of Commission Regulation (EU) No 813/2013 aimed to be covered . 92
Annex ZB (informative) Relationship between this European Standard and the energy
labelling requirements of Commission Delegated Regulation (EU) No 811/2013
aimed to be covered . 93
Bibliography . 95

European foreword
This document (EN 16905-4:2017) has been prepared by Technical Committee CEN/TC 299 “Gas-fired
sorption appliances, indirect fired sorption appliances, gas-fired endothermic engine heat pumps and
domestic gas-fired washing and drying appliances”, the secretariat of which is held by UNI.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by September 2017, and conflicting national standards
shall be withdrawn at the latest by September 2017.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with EU Directive(s), see informative Annex ZA and Annex ZB, which is an integral part
of this document.
This standard comprises the following parts under the general title, Gas-fired endothermic engine driven
heat pumps:
— Part 1: Terms and definitions;
— Part 2: Safety (WI 00299025; currently in preparation);
— Part 3: Test conditions;
— Part 4: Test methods;
— Part 5: Calculation of seasonal performances in heating and cooling mode.
EN 16905-1, prEN 16905-2, EN 16905-3, EN 16905-4 and EN 16905-5 have been prepared to address
the essential requirements of the European Directive 2009/142/EC relating to appliances burning
gaseous fuels (see prEN 16905-2:201X, Annex ZA for safety aspects and EN 16905-5:2017, Annex ZA for
rational use of energy aspects).
These documents are linked to the Energy Related Products Directive (2009/125/EC) in terms of tests
conditions, tests methods and seasonal performances calculation methods under Mandate M/535;
(see EN 16905-3:2017, Annex ZA, EN 16905-4:2017, Annex ZA, EN 16905-5:2017, Annex ZA and
prEN 16905-2:201X, Annex ZB).
These documents will be reviewed whenever new mandates could apply.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
1 Scope
1.1 Scope of EN 16905 series
This European Standard specifies the requirements, test methods and test conditions for the rating and
performance calculation of air conditioners and heat pumps using either air, water or brine as heat
transfer media, with gas-fired endothermic engine driven compressors when used for space heating,
cooling and refrigeration, hereafter referred to as “GEHP appliance”.
This European Standard only applies to appliances with a maximum heat input (based on net calorific
value) not exceeding 70 kW at standard rating conditions.
This European Standard only applies to appliances under categories I , I , I , I , I , I , I , I ,
2H 2E 2Er 2R 2E(S)B 2L 2LL 2ELL
I , I , I , I , I , I II +, II +, II , II , II , II , II , II , II and II
2E(R)B 2ESi 2E(R) 3P 3B 3B/P, 2H3 2Er3 2H3B/P 2L3B/P 2E3B/P 2ELL3B/P 2L3P 2H3P 2E3P 2Er3P
according to EN 437.
This European Standard only applies to appliances having:
a) gas fired endothermic engines under the control of fully automatic control systems;
b) closed system refrigerant circuits in which the refrigerant does not come into direct contact with
the fluid to be cooled or heated;
c) where the temperature of the heat transfer fluid of the heating system (heating water circuit) does
not exceed 105 °C during normal operation;
d) where the maximum operating pressure in the:
1) heating water circuit (if installed) does not exceed 6 bar;
2) domestic hot water circuit (if installed) does not exceed 10 bar.
This European Standard applies to appliances only when used for space heating or space cooling or for
refrigeration, with or without heat recovery.
The appliances having their condenser cooled by air and by the evaporation of external additional
water are not covered by this European Standard.
Packaged units, single split and multisplit systems are covered by this European Standard. Single duct
and double duct units are covered by this European Standard.
The above appliances can have one or more primary or secondary functions.
This European Standard is applicable to appliances that are intended to be type tested. Requirements
for appliances that are not type tested would need to be subject to further consideration.
In the case of packaged units (consisting of several parts), this European Standard applies only to those
designed and supplied as a complete package.
NOTE All the symbols given in this text are used regardless of the language used.
1.2 Scope of EN 16905-4
This part of the EN 16905 series specifies the test methods for gas-fired endothermic engine driven
heat pumps for heating and/or cooling mode including the engine heat recovery.
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 437, Test gases — Test pressures — Appliance categories
EN 12102, 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 level
EN 16905-1, Gas-fired endothermic engine driven heat pumps — Part 1: Terms and definitions
1)
prEN 16905-2 , Gas-fired endothermic engine driven heat pumps — Part 2: Safety
EN 16905-3:2017, Gas-fired endothermic engine driven heat pumps — Part 3: Test conditions
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 16905-1 apply.
4 Test methods
4.1 General
A steady-state or transient or cyclical operation test could be applied for 100 % load tests or for
reduced load tests.
The sound power level is measured in the standard rating conditions as given in EN 16905-3 with the
corresponding test methods according to EN 12102 considering that this standard, dedicated to
determination of the sound power level could be used with appliances covered in the scope of the
EN 16905 series.
4.2 Basic principles method of calculation for the determination of capacities
4.2.1 Capacity
4.2.1.1 Measured capacity
The measured heating or cooling capacity of air-to-air or water (brine)-to-air GEHP shall be determined
by measurements in a calorimeter room (see Annex A) or by the air enthalpy method (see Annex B).
The measured heating or cooling capacity of air-to-water (brine) or water (brine)-to-water (brine)
GEHP shall be determined in accordance with the water enthalpy method (see Annex D).
The measured heat recovery capacity of all GEHP shall be determined in accordance with the water
enthalpy method (see Annex D).

1) Currently in preparation.
4.2.1.2 Effective capacity
4.2.1.2.1 Effective heating capacity
The effective heating capacity is the measured heating capacity corrected for the heat from the device
(pump(s) or fan(s)) responsible for circulating the heat transfer medium through the indoor heat
exchanger:
a) if the fan(s) or pump(s) is (are) an integral part of the appliance, the capacity correction due to the
device, C , calculated according to 4.2.4.3.3.1 or 4.2.4.4.2.1, which is excluded from the total
device_indoor
electrical power input shall also be subtracted from the heating capacity (the correction is
negative). The effective heating capacity shall be determined using the following formula:
Q Q−Abs C (1)
( )
Eh h device _indoor
b) if the fan(s) or pump(s) is (are) not an integral part of the appliance, the capacity correction due to
the device, C , calculated according to 4.2.4.3.3.2 or 4.2.4.4.2.2, which is added to the total
device_indoor
electrical power input shall be also added to the heating capacity (the correction is positive). The
effective heating capacity shall be determined using the following formula:
Q Q+Abs C (2)
( )
Eh h device _indoor
where
Q is the effective heating capacity, in kilowatt;
Eh
Q is the measured heating capacity, in kilowatt;
h
C is the capacity correction due to the device(s) (fan(s) or pump(s)) responsible for
device_indoor
circulating the heat transfer medium through the indoor heat exchanger, in kilowatt.
4.2.1.2.2 Effective cooling capacity
The effective cooling capacity is the measured cooling capacity corrected for the heat from the device
(pump(s) or fan(s)) responsible for circulating the heat transfer medium through the indoor heat
exchanger:
a) if the fan(s) or pump(s) is (are) an integral part of the appliance, the capacity correction due to the
device, C , calculated according to 4.2.4.3.3.1 or 4.2.4.4.2.1, which is excluded from the total
device-indoor
power input shall be added to the cooling capacity (the correction is positive). The effective heating
capacity shall be determined using the following formula:
Q Q+Abs C (3)
( )
Ec c device _indoor
b) if the fan(s) or pump(s) is (are) not an integral part of the appliance, the capacity correction due to
the device, Cdevice-indoor, calculated according to 4.2.4.3.3.2 or 4.2.4.4.2.2, which is added to the total
electrical power input shall be subtracted from the cooling capacity (the correction is negative).The
effective cooling capacity shall be determined using the following formula:
Q Q−Abs C (4)
( )
Ec c device _indoor
where:
Q is the effective cooling capacity, in kilowatt;
EC
=
=
=
=
Q is the measured cooling capacity, in kilowatt;
c
C is the capacity correction due to the device(s) (fan(s) or pump(s)) responsible for
device_indoor
circulating the heat transfer medium through the indoor heat exchanger, in kilowatt.
4.2.1.3 Rating capacity
4.2.1.3.1 Rating heating capacity
The rating heating capacity shall be determined using the following formula:
Q
grh
Q=Q×±Abs C (5)
( )
Rh h device _indoor
Q
gmh
where
Q is the rating heating capacity, in kilowatt;
Rh
Q is the measured heating capacity, in kilowatt;
h
Q is the rating gas heat input in heating mode, in kilowatt;
grh
Q is the measured gas heat input in heating mode, in kilowatt;
gmh
C is the capacity correction due to the device(s) (fan(s) or pump(s)) responsible for
device_indoor
circulating the heat transfer medium through the indoor heat exchanger, in kilowatt.
NOTE For more explanation about the capacity correction due to the device responsible for circulating the
heat transfer medium through the indoor heat exchanger, see 4.2.1.2.1.
4.2.1.3.2 Rating cooling capacity
The rating cooling capacity shall be determined using the following formula:
Q
grc
Q=Q×±Abs C (6)
( )
Rc c device _indoor
Q
gmc
where
Q is the rating cooling capacity, in kilowatt;
Rc
Q is the measured cooling capacity, in kilowatt;
c
Q is the rating gas heat input in cooling mode, in kilowatt;
grc
Q is the measured gas heat input in cooling mode, in kilowatt;
gmc
C is the capacity correction due to the device(s) (fan(s) or pump(s)) responsible for
device_indoor
circulating the heat transfer medium through the indoor heat exchanger, in kilowatt.
NOTE For more explanation about the capacity correction due to the device responsible for circulating the
heat transfer medium through the indoor heat exchanger, see 4.2.1.2.2.
4.2.2 Engine heat recovery capacity
4.2.2.1 Effective engine heat recovery capacity
The effective engine heat recovery capacity is the measured engine heat recovery capacity corrected for
the heat from the device (pump(s)) of the engine heat recovery circuit (measured in any condition):
a) if this (these) pump(s) is (are) an integral part of the appliance, the capacity correction due to the
pump(s), c , calculated according to 4.2.4.4.2.1 which is excluded from the total electrical
device_hr
power input shall be also subtracted from the engine heat recovery capacity (the correction is
negative).
b) if this(these) pump(s) is (are) not an integral part of the appliance, capacity correction due to the
pump(s), c , calculated according to 4.2.4.4.2.2, which is added to the total electrical power
device_hr
input shall be also added to the engine heat recovery capacity (the correction is positive).
The effective engine heat recovery capacity shall be determined using the following formula, which
is applicable to either heating or cooling mode:
Q Q±Abs C (7)
( )
Ehr hr device _hr
where
Q is the effective engine heat recovery capacity, in kilowatt;
Ehr
Q is the measured engine heat recovery capacity, in kilowatt;
hr
C is the capacity correction due to the pump(s) responsible for circulating the heat transfer
device_hr
medium through the engine heat recovery exchanger, in kilowatt.
4.2.2.2 Rating engine heat recovery capacity in heating mode
The rating engine heat recovery capacity shall be determined using the following formula:
Q
grhrh
(8)
Q =Q×±Abs C
( )
Rhrh hr device _hr
Q
gmhr
where
Q is the rating engine heat recovery capacity in heating mode, in kilowatt;
Rhrh
Q is the measured engine heat recovery capacity, in kilowatt;
hr
Q is the rating engine heat recovery gas heat input in heating mode, in kilowatt;
grhrh
Q is the measured engine heat recovery gas heat input, in kilowatt;
gmhr
C is the capacity correction due to the pump(s) responsible for circulating the heat transfer
device_hr
medium through the engine heat recovery heat exchanger, in kilowatt.
NOTE For more explanation about the capacity correction due to the pump(s) responsible for circulating the
heat transfer medium through the engine heat recovery heat exchanger, see 4.2.2.1.
4.2.2.3 Rating engine heat recovery capacity in cooling mode
The rating engine heat recovery capacity shall be determined using the following formula:
Q
grhrc
Q =Q×±Abs C (9)
( )
Rhrc hr device _hr
Q
gmhr
where
Q is the rating engine heat recovery capacity in cooling mode, in kilowatt;
Rhrc
Q is the measured engine heat recovery capacity, in kilowatt;
hr
Q is the rating engine heat recovery gas heat input in cooling mode, in kilowatt;
grhrc
Q is the measured engine heat recovery gas heat input, in kilowatt;
gmhr
=
C is the capacity correction due to the pump(s) responsible for circulating the heat transfer
device_hr
medium through the engine heat recovery heat exchanger, in kilowatt.
NOTE 1 For more explanation about the capacity correction due to the pump(s) responsible for circulating the
heat transfer medium through the engine heat recovery heat exchanger, see 4.2.2.1.
NOTE 2 The rating heat recovery heat input in cooling mode is equal to the rating heat recovery heat input in
heating mode.
4.2.3 Heat input
4.2.3.1 General conditions for operation of the gas-fired part of the appliance
Tests are carried out with the appropriate reference gas(es) for the category to which the appliance
belongs (see EN 437), supplied at the corresponding normal pressure indicated in EN 437.
4.2.3.2 Measurement of heat inputs under test conditions
The appliance is installed as described in prEN 16905-2 and adjusted as described in 4.2.4.1 and then
operated at the heat input imposed by control system of the appliance. The heat input measurement is
carried out when thermal “equilibrium” conditions have been achieved under the particular test
conditions.
NOTE 1 It is important to note that the rating heating, cooling or heat recovery heat input is determined in
accordance with the method given in prEN 16905–2, but that the measured heat input achieved under particular
test conditions is different and determined in a different way. This is described below.
Air pressure at inlet and outlet of the gas engine shall be balanced to avoid under/over pressure of the
gas engine.
The heat input under the test conditions (Q ) in kilowatt is given by the formula:
gm
n
Mc *H
( )
∑ j iM T j
( )
j=1
Q 0,278⋅ (10)
gm
n
or
n
Vc *H
( )
∑ j iV T j
( )
j=1
Q 0,278⋅ (11)
gm
n
where
j is the scan number;
n is the number of scan of the data collection period;
Q is the measured heat input, in kilowatt;
gm
H is the net calorific value of the test gas at the considered scan, in megajoule per kilogram;
iM(T)j
Mc is the mass flow rate of dry test gas at the considered scan, in kilogram per hour;
j
H is the net calorific value of the test gas at the considered scan, in megajoule per cubic
iV(T)j
meter (dry gas, 15 °C, 1 013,25 mbar);
Vc is the volumetric flow rate of dry test gas corrected to 1013,25 mbar and 15 °C at the
j
considered scan, in cubic meter per hour and derived from the following formula:
=
=
p +−pj p
288,15
aj wj
(12)
Vc=V⋅⋅
j mj
1013, 25 273,15+t
gj
where
V is the measured gas flow rate at the considered scan, in cubic meter per hour;
mj
p is the atmospheric pressure at the considered scan, in millibar;
aj
pj is the gas supply pressure at the gas meter at the considered scan, in millibar;
p is the partial (water) vapour pressure in the gas used at the considered scan, in millibar;
wj
t is the gas temperature at the gas meter at the considered scan, in degrees Celsius.
gj
NOTE 2 It is important to note that gas supply pressure at the gas meter is different from gas supply pressure
of the appliance.
NOTE 3 Alternative expression of heat inputs.
In recognition that in several European markets and in recent European Norms and Regulations, the use
of the gross calorific value is becoming increasingly diffused, the alternative calculation and publication
of heat input (Q ) on the basis of the gross calorific value is allowed only when the reference GCV is
g
explicitly stated beside the value.
EXAMPLE Q : 23 kW
g GCV.
Elsewhere, the heat input (Q ) is always to be understood as based on net calorific value (NCV) as per
g
4.2.3.2.
4.2.4 Electrical power input
4.2.4.1 General condition for operation of the electrical part of the appliance
Tests are carried out with the nominal voltage.
The “global” electrical power input correction depends on the design of each appliance. Its “global”
correction is the sum of appropriate “individual” corrections (see Annex G).
4.2.4.2 Effective electrical power input
The effective electrical power input shall be determined using the following formula:
n
P
( )
∑ Tj
j=1
P=±Abs C ±Abs C ±Abs C (13)
( ) ( ) ( )
E device __indoor device outdoor device _hr
n
where
j is the scan number;
n is the number of scan of the data collection period;
P is the effective electrical power input, in kilowatt;
E
P is measured (total) electrical power input at the considered scan, in kilowatt;
Tj
C is the electrical power input correction due to the device(s) (fan(s) or pump(s))
device_indoor
responsible for circulating the heat transfer medium through the indoor heat
exchanger, in kilowatt;
C is the electrical power input correction due to the device(s) (fan(s) or pump(s))
device_outdoor
responsible for circulating the heat transfer medium through the outdoor heat
exchanger, in kilowatt;
C is the capacity correction due to the pump(s) responsible for circulating the heat
device_hr
transfer medium through the engine heat recovery heat exchanger, in kilowatt.
NOTE The effective electrical power input is not corrected to heat recovery pump contribution as long as the
heat recovery is not taken into account in calculation procedure of the Energy Related Products Directive
(2009/125/EC).
4.2.4.3 Electrical power input correction of fan(s)
4.2.4.3.1 General
The following corrections of the electrical power input of fan(s) shall be made for fan(s) responsible for
circulating the heat transfer medium through the indoor or outdoor heat exchanger, where applicable.
4.2.4.3.2 Electrical power input correction of fan(s) for appliances without duct connection
4.2.4.3.2.1 Electrical power input correction for appliances with at least one internal fan
In the case of appliances which are not designed for duct connection, i.e. which do not permit any
external pressure differences, and which are equipped with integral fan(s), the electrical power
absorbed by the fan(s) shall be included in the effective electrical power absorbed by the appliance (no
correction).
4.2.4.3.2.2 Electrical power input correction for appliances without internal fan
If no fan is provided with the appliance, the part of the electrical power input which is to be included in
the effective electrical power absorbed by the appliance shall be calculated using the following formula
(the correction is positive):
q×−pi
( )
C orC = (14)
device _indoor device _outdoor
η *1000
where
C is the electrical correction due to fan(s) responsible for circulating the heat transfer
device_indoor
medium through the indoor heat exchanger, in kilowatt;
C is the electrical correction due to fan(s) responsible for circulating the heat transfer
device_outdoor
medium through the outdoor heat exchanger, in kilowatt;
η is the efficiency of the fan(s);
Δpi is the measured internal static pressure difference, expressed in Pascal;
q is the measured air flow rate at standard air conditions, in cubic meters per second.
NOTE The efficiency of the fan(s) given in a report edited by an accredited laboratory is used. Otherwise, the
efficiency of the fan(s) is equal to 0,3 by convention.
4.2.4.3.3 Electrical power input correction of fan(s) for appliances with duct connection
4.2.4.3.3.1 Electrical power input correction for appliances with at least one internal fan
If the fan(s) is (are) an integral part of the appliance, only a part of the electrical power input o
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