ISO/DIS 17553

Room fan-coil units -- Testing and rating for performance

Évaporateurs individuels à ventilation forcée -- Essais et détermination des caractéristiques de performance

Standards Content (sample)

DRAFT INTERNATIONAL STANDARD ISO/DIS 17553
ISO/TC 86/SC 6 Secretariat: ANSI
Voting begins on: Voting terminates on:
2010-02-17 2010-07-17

INTERNATIONAL ORGANIZATION FOR STANDARDIZATION • МЕЖДУНАРОДНАЯ ОРГАНИЗАЦИЯ ПО СТАНДАРТИЗАЦИИ • ORGANISATION INTERNATIONALE DE NORMALISATION

Room fan-coil units — Testing and rating for performance

Évaporateurs individuels à ventilation forcée — Essais et détermination des caractéristiques de performance

ICS 23.120

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International Organization for Standardization, 2010
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ISO/DIS 17553
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ISO/DIS 17553
ISO/DIS
Contents Page

Foreword.............................................................................................................................................................vi

1 Scope ......................................................................................................................................................1

2 Normative references ............................................................................................................................1

3 Terms and definitions ...........................................................................................................................1

3.1 cooling capacity.....................................................................................................................................2

4 Standard rating tests.............................................................................................................................2

4.1 Cooling capacity ratings.......................................................................................................................2

4.1.1 General conditions ................................................................................................................................2

4.1.2 Testing conditions.................................................................................................................................2

4.1.3 Air flow conditions ................................................................................................................................2

4.2 Heating capacity ratings .......................................................................................................................3

4.2.1 General conditions ................................................................................................................................3

4.2.2 4.2.2 Testing conditions........................................................................................................................3

4.3 Air flow ratings.......................................................................................................................................3

4.3.1 General conditions ................................................................................................................................3

4.3.2 Temperature conditions........................................................................................................................4

4.3.3 Electrical conditions..............................................................................................................................4

5 Performance tests .................................................................................................................................4

5.1 Low-voltage test ....................................................................................................................................4

5.1.1 General conditions ................................................................................................................................4

5.1.2 Performance requirement.....................................................................................................................4

5.2 Condensate control test........................................................................................................................4

5.2.1 General conditions ................................................................................................................................4

5.2.2 Temperature conditions........................................................................................................................4

5.2.3 Air flow conditions ................................................................................................................................4

5.2.4 Test condition ........................................................................................................................................4

5.2.5 Performance requirement.....................................................................................................................4

6 Test methods and uncertainties of measurement..............................................................................5

6.1 Test Methods..........................................................................................................................................5

6.1.1 General....................................................................................................................................................5

6.2 Test duration ..........................................................................................................................................5

7 Test results.............................................................................................................................................7

7.1 General....................................................................................................................................................7

7.2 Calculations............................................................................................................................................7

7.3 Data to be recorded ...............................................................................................................................7

8 Marking provisions................................................................................................................................7

8.1 Nameplate requirements.......................................................................................................................7

8.2 Nameplate information..........................................................................................................................7

9 Publication of ratings ............................................................................................................................7

9.1 Standard ratings ....................................................................................................................................7

Annex A (normative)...........................................................................................................................................9

Input Capacity Rating Test Methods.................................................................................................................9

A.1 General....................................................................................................................................................9

A.2 Test methods..........................................................................................................................................9

A.2.1 Test facility requirements .....................................................................................................................9

A.2.2 Installation of the test unit ..................................................................................................................10

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A.3 Air inlet dry-bulb temperature............................................................................................................10

A.4 Air inlet moisture content...................................................................................................................11

A.5 Water temperature...............................................................................................................................11

A.6 Water pressure ....................................................................................................................................11

A.7 Condensate temperature ....................................................................................................................11

A.8 Water flow rate.....................................................................................................................................11

A.9 Air flow rate..........................................................................................................................................11

A.10 Data to be recorded.............................................................................................................................11

A.11 Capacity calculations..........................................................................................................................12

A.11.1 Cooling capacities...............................................................................................................................12

A.11.2 The total air cooling capacity of the fan-coil unit is equal to the capacity measured on the

water side minus the energy added by the fan and motor..............................................................12

A.12 Heating capacity ..................................................................................................................................13

Annex B (informative) Output Capacity Rating Test Methods .....................................................................14

B.1 General .................................................................................................................................................14

B.2 Input-output test average ...................................................................................................................14

B.3 Test methods .......................................................................................................................................14

B.4 Tunnel air enthalpy test method ........................................................................................................14

B.5 Room air enthalpy test method..........................................................................................................14

B.6 Installation of the test unit..................................................................................................................14

B.7 Test apparatus .....................................................................................................................................15

B.8 Airflow- and temperature-measuring apparatus ..............................................................................15

B.9 Test room requirements .....................................................................................................................15

B.10 Water-measuring apparatus...............................................................................................................15

B.11 Water flow rate.....................................................................................................................................15

B.12 Water temperature...............................................................................................................................15

B.13 Water pressure ....................................................................................................................................16

B.14 Condensate temperature ....................................................................................................................16

B.15 Measurement criteria ..........................................................................................................................16

B.16 Air temperatures..................................................................................................................................16

B.17 Pressure measurements.....................................................................................................................16

B.18 Air pressure..........................................................................................................................................16

B.19 Water pressure measurements..........................................................................................................16

B.20 Test procedures...................................................................................................................................17

B.21 General .................................................................................................................................................17

B.22 Calculations .........................................................................................................................................17

B.23 Air delivery ...........................................................................................................................................17

B.24 Cooling and heating capacity.............................................................................................................18

B.25 Airflow...................................................................................................................................................18

B.26 Fan motor heat.....................................................................................................................................18

B.27 Air-side cooling capacity calculations..............................................................................................18

B.28 Air-side heating capacity....................................................................................................................19

B.29 Water flow.............................................................................................................................................19

B.29.1 Where the water flow rate is measured in volume rather than mass, the calculation for the

conversion to mass flow rate units of measure shall be as follows:......................................................19

B.30 Water-side cooling capacity...............................................................................................................19

B.28.1 The total water-side cooling capacity shall be calculated as follows:....................................................19

B.31 Water-side heating capacity...............................................................................................................19

B.29.1 The total water-side heating capacity shall be calculated as follows: ...................................................19

B.32 Average capacities and heat balance calculations..........................................................................19

B.30.1 The average cooling capacities of the air and water sides shall be calculated as follows:...................19

B.30.2 The heat balance between the air- and water-side capacities shall be calculated as follows: .............19

Data to be recorded..........................................................................................................................................20

Annex C (informative) Calorimeter Test Methods..........................................................................................25

C.1 General .................................................................................................................................................25

C.2 Calibrated type calorimeter ................................................................................................................25

C.3 Test room requirements .....................................................................................................................25

C.4 Ambient air temperatures...................................................................................................................25

C.5 Calibration of the test room................................................................................................................25

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C.6 Balanced type calorimeter..................................................................................................................26

C.7 Test room requirements......................................................................................................................26

C.8 Calculations..........................................................................................................................................26

C.9 Cooling capacity ..................................................................................................................................26

C.10 Heating capacity ..................................................................................................................................26

C.6.1 The air heating capacity is calculated as follows:..................................................................................26

C.11 Air flow rate measurement..................................................................................................................26

C.12 Test method..........................................................................................................................................26

C.13 Data to be recorded .............................................................................................................................27

Annex D (informative) Air Flow Measurement................................................................................................30

D.1 Airflow determination..........................................................................................................................30

D.2 Test method..........................................................................................................................................30

D.3 Tunnel design.......................................................................................................................................30

D.4 Calculations..........................................................................................................................................30

Annex E (informative) Symbols and Units......................................................................................................32

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ISO/DIS 17553
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 through ISO

technical committees. Each member body interested in a subject for which a technical committee has been

established has the right to be represented on that committee. International organizations, governmental and

non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the

International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.

The main task of technical committees is to prepare International Standards. Draft International Standards

adopted by the technical committees are circulated to the member bodies for voting. Publication as an

International Standard requires approval by at least 75 % of the member bodies casting a vote.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent

rights. ISO shall not be held responsible for identifying any or all such patent rights.

ISO was prepared by Technical Committee ISO/TC 86, Refrigeration and air-conditioning, Subcommittee

SC 6, Factory-made air-cooled air-conditioning and air-to-air heat pump units.

This second/third/... edition cancels and replaces the first/second/... edition (), [clause(s) / subclause(s) /

table(s) / figure(s) / annex(es)] of which [has / have] been technically revised.

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DDRRAAFFTT I INNTTEERRNNAATTIOIONNAALL S STTAANNDDAARRDD ISO/DIS 17553ISO/DIS
Room fan-coil units — Testing and rating for performance
1 Scope

This International Standard applies to factory-made assemblies, which provide the functions of cooling and/or

heating but do not include the source of cooling or heating. These units are normally designed for free

delivery of air into a room, but may be installed with minimal duct work having a static resistance generally not

exceeding 65 Pa [0,26 in wg] and a maximum air flow of 0,7 m /s [1,483.2 cfm].

This International Standard provides for the use of hot or chilled water in determining the thermal performance

of room fan-coil units at standard rating conditions. The test procedures contained in this international

standard may additionally be used for determining performance at other conditions.

This International Standard does not cover the rating of heating or cooling from direct expansion coils or

heating from electric resistance elements.

NOTE For the purposes of the remaining clauses, the terms “unit” and “equipment” are used to mean “room fan-coil

units” as defined in 3.1.

NOTE SI units are provided in the standard as a normative absolute, and I-P are provided as a reference only.

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated

references, only the edition cited applies. For undated references, the latest edition of the referenced

document (including any amendments) applies.

ISO 5221-1984, Air distribution and air diffusion – Rules to methods of measuring air flow rate in an air

handling duct
ISO 5801-2007, Industrial fans – Performance testing using standardized airways

ISO 5167-1-1991, Measurement of fluid flow by means of pressure differential devices: Part 1: Orifice plates,

nozzles and venturi tubes inserted in circular cross-section conduits running full

ISO 5167-1 FDA1, Amendment 1, 1997

EN 1397-1999, Heat exchangers – Hydronic room fan coil units – Test procedure for establishing the

performance
3 Terms and definitions

For the purposes of this document, the following terms and definitions apply / the terms and definitions given

in … and the following apply.
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3.1 cooling capacity
3.1.1
latent cooling capacity

heat which is removed from the air by condensation of water vapour on the cooling coil.

3.1.2
sensible cooling capacity

heat which is removed from the air by the unit as measured by a dry-bulb temperature change.

3.1.3
total cooling capacity

total heat removal capacity from the air; the sum of the sensible and latent heat removal capacity.

3.2
heating capacity
total heat added to the air by the unit.
3.3
room fan-coil unit

factory-made single assembly which provides one or more of the functions of forced circulation of air, heating,

cooling, dehumidification and filtering of air, but which does not include the source of heating or cooling. This

device is designed for free intake of air from a room and delivery of that air back into the same room, but may

be applied with minimal ductwork. This device may also be designed for built-in (furred-in) applications, or

within an enclosure for application within the conditioned space. This device employs only direct drive

mechanisms for the fan.
3.4
standard air

dry air at 20,0 °C [68,0 °F] and at a standard barometric pressure of 101,325 kPa [406,782 in wg], having a

mass density of 1,204 kg/m3 [0,0752 lb/ft3].
4 Standard rating tests
4.1 Cooling capacity ratings
4.1.1 General conditions

4.1.1.1 The air filter and any air mixers, air-inlets, grilles, deflecting vanes, and any other regularly

provided equipment shall be in place during the tests. Valve packages shall not be included in the tests.

4.1.2 Testing conditions

4.1.2.1 The cooling capacities shall be determined in accordance with the testing conditions specified in

Table 1. The water flow rates shall be those necessary to maintain the standard rating conditions established

in Table 1.
4.1.3 Air flow conditions

4.1.3.1 In establishing air flow conditions for fan-coil units, there shall be no water flow through the coil.

Free delivery fan-coil units shall be tested at the highest fan setting, with the outside air dampers closed, and

a zero external static pressure. Built-in fan-coil units which are supplied by the manufacturer without a filter or

grilles, or both, as part of the unit shall be tested with an external static pressure of either 12,5 Pa [0,050 in

wg] or 50 Pa [0,20 in wg], as specified by the manufacturer in the manufacturers’ equipment specification

sheets. The external static pressure is set with dry coil and will be allowed to slightly change during the

cooling capacity test but will remain in accordance with Table 4 and Table 5.
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4.2 Heating capacity ratings
4.2.1 General conditions

The general conditions established in 4.1.1 for cooling capacity rating tests shall apply to the heating capacity

rating tests.
4.2.2 Testing conditions

The heating capacities shall be determined in accordance with the testing conditions specified in Table 1. The

water flow rate shall be derived from the information provided in Table 1. The air flow conditions for the

heating capacity test shall be those established in 4.1.3 for the cooling capacity test.

Table 1 – Cooling and heating capacity test conditions
Cooling
Heating Capacity
Capacity
Test Conditions
2 Pipe and 4
2 Pipe System 4 Pipe System
Pipe
Temperature of air entering unit-dry bulb, t
27 °C [81 °F] 20 °C [68 °F] 20 °C [68 °F]

Temperature of air entering unit-wet bulb, t' 19 °C [66 °F] Max 15 °C [59 °F] Max 15 °C [59 °F]

Inlet water temperature, t 7 °C [45 °F] 45 °C [113 °F] 70 °C [158 °F]
...