Regulation No. 122-00

Name:Regulation No. 122-00
Description:Heating Systems for Vehicles Categories M, N and O.
Official Title:Uniform Provisions Concerning the Approval of: Vehicles of Categories M, N and O with Regard to their Heating Systems.
Country:ECE - United Nations
Date of Issue:2006-01-18
Amendment Level:00 Series, Supplement 3
Number of Pages:30
Vehicle Types:Bus, Car, Component, Heavy Truck, Light Truck, Trailer
Subject Categories:Miscellaneous
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Keywords:

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Text Extract:

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E/ECE/324
) Rev.2/Add.121/Amend.3
E/ECE/TRANS/505 )
August 15, 2012
STATUS OF UNITED NATIONS REGULATION
ECE 122-00
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF:
VEHICLES OF CATEGORIES M, N AND O WITH REGARD
TO THEIR HEATING SYSTEMS
Incorporating:
00 series of amendments
Date of Entry into Force: 18.01.06
Corr. 1 to the 00 series of amendments
Dated: 18.01.06
Corr. 2 to the 00 series of amendments
Dated: 13.12.06
Supplement 1 to the 00 series of amendments
Date of Entry into Force: 22.07.09
Supplement 2 to the 00 series of amendments
Date of Entry into Force: 23.06.11
Supplement 3 to the 00 series of amendments
Date of Entry into Force: 26.07.12

REGULATION No. 122
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF VEHICLES OF CATEGORIES M, N
AND O WITH REGARD TO THEIR HEATING SYSTEMS
REGULATION
1. Scope
2. Definitions: General
3. Application for approval
4. Approval
CONTENTS
5. Part I: Approval of a vehicle type with regard to its heating system
6. Part II: Approval of a heating system with regard to its operational safety
7. Modification and extension of approval of a vehicle or component type
8. Conformity of production
9. Penalties for non-conformity of production
10. Production definitely discontinued
11. Names and addresses of technical services conducting approval tests and administrative
departments
ANNEXES
Annex 1
Annex 2
Annex 3
Annex 4
Annex 5
Annex 6
Annex 7
Annex 8
Annex 9
– Information documents and communication forms
– Arrangement of approval marks
– Requirements for waste heating systems – AIR
– Test procedure for air quality
– Test procedure for temperature
– Test procedure for exhaust emission of combustion heaters
– Additional requirements for combustion heaters
– Safety requirements for LPG combustion heaters
– Additional provisions applicable to certain vehicles as specified in the ADR

3. APPLICATION FOR APPROVAL
3.1. Application for Approval of a Type of Vehicle with Regard to its Heating System
3.1.1. The application for approval of a vehicle type with regard to its heating system shall be
submitted by the manufacturer of the vehicle or by his duly accredited representative.
3.1.2. It shall be accompanied by the undermentioned documents in triplicate and by the following
particulars:
3.1.2.1. a detailed description of the vehicle type with respect to its structure, dimensions,
configuration and constituent materials;
3.1.2.2. drawings of the heating system and its general arrangement
3.1.3. A model for the information document is given in Annex 1, Part 1, Appendix 1.
3.1.4. A vehicle representative of the type to be approved must be submitted to the technical service
responsible for conducting the type-approval tests.
3.1.5. If the vehicle to be approved is equipped with a heater with an ECE type approval, the type
approval number and the maker’s type designations of this type of heater shall be enclosed in
the application for the vehicle type approval.
3.1.6. If the vehicle to be approved is equipped with a heater without ECE type approval, one
sample representative of the type to be approved shall be submitted to the technical service.
3.2. Application for Approval of a Type of Heater
3.2.1. The application for approval of a type of heater as a component shall be submitted by the
manufacturer of the heating system.
3.2.2. It shall be accompanied by the undermentioned documents in triplicate and by the following
particulars:
3.2.2.1. a detailed description of the heating system type with respect to its structure, dimensions,
configuration and constituent materials;
3.2.2.2. drawings of the heating system and its general arrangement
3.2.3. A model for the information document is given in Annex 1 Part 1, Appendix 2.
3.2.4. One sample heater representative of the type to be approved shall be submitted to the
technical service.
3.2.5. The sample shall be clearly and indelibly marked with the applicant’s trade name or mark and
the type designation.
4. APPROVAL
4.1. If the type submitted for approval to this Regulation meets the requirements of the relevant
part(s) of this Regulation, approval of that type shall be granted.

5. PART I: APPROVAL OF A VEHICLE TYPE WITH REGARD TO ITS HEATING SYSTEM
5.1. Definition
For the purpose of Part I of this Regulation,
5.1.1. "Vehicle type with regard to heating system" means vehicles which do not differ in
essential respects such as the functioning principle(s) of the heating system.
5.2. Specifications
5.2.1. The passenger compartment of every vehicle shall be fitted with a heating system. If a
heating system for the load area is provided in a vehicle, it shall comply with this Regulation.
5.2.2. The heating system of the vehicle to be type approved shall meet the technical requirements
of Part II of this Regulation.
5.3. Vehicle Installation Requirements for Combustion Heaters and for Electric Heaters
5.3.1. Scope
5.3.1.1. Subject to Paragraph 5.3.1.2., heaters shall be installed according to the requirements of
Paragraph 5.3.
5.3.1.2. Vehicles of Category O having liquid fuel heaters are deemed to comply with the
requirements of Paragraph 5.3.
5.3.2. Positioning of Heater
5.3.2.1. Body sections and any other components in the vicinity of the heater must be protected from
excessive heat and the possibility of fuel or oil contamination.
5.3.2.2. The heater shall not constitute a risk of fire, even in the case of overheating. This
requirement shall be deemed to be met if the installation ensures an adequate distance to all
parts and suitable ventilation, by the use of fire resistant materials or by the use of heat
shields.
5.3.2.3. In the case of M and M vehicles, the combustion heater must not be positioned in the
passenger compartment. However, an installation in an effectively sealed envelope which
also complies with the conditions in Paragraph 5.3.2.2. may be used.
5.3.2.4. The label referred to in Annex 7, Paragraph 1.4., or a duplicate, must be positioned so that it
can be easily read when the combustion heater is installed in the vehicle.
5.3.2.5. Every reasonable precaution should be taken in positioning the heater to minimize the risk of
injury and damage to personal property.
5.3.3. Fuel Supply of Combustion Heaters
5.3.3.1. The fuel filler must not be situated in the passenger compartment and must be provided with
an effective cap to prevent fuel spillage.
5.3.3.2. In the case of liquid fuel heaters, where a supply separate from that of the vehicle is provided,
the type of fuel and its filler point must be clearly labelled.

6.1.3. "Type of heating systems" means devices which do not differ in essential respects such as:



energy supply (e.g. liquid fuel or electricity),
transfer medium (e.g. air or water),
vehicle location (e.g. passenger compartment or load area).
6.1.4. "Waste-heat heating system" means any type of device using the waste heat from the
engine used for propulsion of the vehicle to increase the temperature of the interior of the
vehicle, this may include water, oil or air as the transfer medium.
6.1.5. "Electric heater" means a device using electric energy from an onboard or external source
to increase the temperature of the interior of the vehicle. Electrical devices which are
installed in addition to the main heating system are not considered as electric heaters
according to this Regulation. Besides electric devices installed in components for the sole
purpose of heating that component are not considered as electric heaters according to this
Regulation.
6.2. Specifications: General
The requirements for heating systems are that:



the heated air entering the passenger compartment shall be no more polluted than the
air at the point of inlet to the vehicle,
the driver and passengers, during road use, will not be able to come into contact with
parts of the vehicle or heated air liable to cause burns,
the exhaust emissions from combustion heaters are within acceptable limits.
The test procedures for verification of each of these requirements are set out in Annexes 4, 5
and 6.

7.2. Confirmation or refusal of approval, specifying the modifications, shall be communicated by the
procedure specified in Paragraph 4.3. to the Contracting Parties to the Agreement which apply
this Regulation.
7.3. The competent authority issuing the extension of approval shall assign a series number for
such an extension and inform thereof the other Contracting Parties to the 1958 Agreement
applying this Regulation by means of a communication form conforming to the model in
Annex 1, Part 2, Appendix 1 or 2 as appropriate to this Regulation.
8. CONFORMITY OF PRODUCTION
The conformity of production procedures shall comply with those set out in the Agreement,
Appendix 2 (E/ECE/324-E/ECE/TRANS/505/Rev.2), with the following requirements:
8.1. Vehicles and components approved to this regulation shall be so manufactured as to conform to
the type approved by meeting the requirements set forth in Paragraphs 5 and 6 above.
8.2. The competent authority which has granted type-approval may at any time verify the conformity
control methods applicable to each production facility. The normal frequency of these
verifications shall be once per two years.
9. PENALTIES FOR NON-CONFORMITY OF PRODUCTION
9.1. The approval granted in respect of a vehicle type pursuant to this Regulation may be withdrawn
if the requirements laid down in Paragraphs 5 and 6 above are not complied with.
9.2. If a Contracting Party to the Agreement applying this Regulation withdraws an approval it has
previously granted, it shall forthwith notify the other Contracting Parties applying this Regulation,
by means of a communication form conforming to the model in Annex 1, Part 2, Appendix 1 or 2
to this Regulation.
10. PRODUCTION DEFINITELY DISCONTINUED
If the holder of the approval completely ceases to manufacture a type of vehicle or component
under this Regulation, he shall so inform the authority which granted the approval. Upon
receiving the relevant communication, that authority shall inform thereof the other Parties to the
1958 Agreement applying this regulation by means of a communication form conforming to the
model in Annex 1, Part 2, Appendix 1 or 2 to this Regulation.
11. NAMES AND ADDRESSES OF TECHNICAL SERVICES CONDUCTING APPROVAL
TESTS, AND ADMINISTRATIVE DEPARTMENTS
The Contracting Parties to the Agreement which apply this Regulation shall communicate to the
Secretariat of the United Nations the names and addresses of the technical services
responsible for conducting approval tests and of the administrative departments which grant
approval and to which forms certifying approval or extension or refusal or withdrawal of
approval, issued in other countries, are to be sent.

2.7. Pressure charger: Yes/No
2.7.1. Type(s) ...........................................................................................................................................
2.7.2. Description of the system (e.g. maximum charge pressure: .......... kPa, wastegate if applicable)
3. BODYWORK
3.1. A brief description of the vehicle with regard to the heating system if the heating system uses
the heat of the engine cooling fluid ................................................................................................
3.2. A brief description of the vehicle type with regard to the heating system if the cooling air or the
exhaust gases of the engine are used as the heat source, including: ...........................................
3.2.1. Layout of the heating system showing its position in the vehicle: ..................................................
3.2.2. Layout drawing of the heat exchanger for heating systems using the exhaust gases for heating
or of the parts where the heat exchange takes place (for heating systems using the engine
cooling air for heating): ...................................................................................................................
3.2.3. Sectional drawing of the heat exchanger or the parts respectively where the heat exchange
takes place, indicating the thickness of the wall, materials used and the characteristics of the
surface: ...........................................................................................................................................
3.2.4. Specifications shall be given for further important components of the heating system, such as
e.g. the heater fan, with regard to their method of construction and technical data ......................
........................................................................................................................................................
3.3. A brief description of the vehicle type with regard to the combustion heating system and the
automatic control: ...........................................................................................................................
3.3.1. layout drawing of the combustion heater, the air inlet system, the exhaust system, the fuel tank,
the fuel supply system (including the valves) and the electrical connections showing their
positions in the vehicle.
3.4. Maximum electrical consumption: ............................................................................................ kW

PART 2
APPENDIX 1
(Maximum format: A4 (210 mm x 297 mm))
COMMUNICATION
Issued by:
Name of administration
.....................................
.....................................
.....................................
concerning:
APPROVAL GRANTED
APPROVAL EXTENDED
APPROVAL REFUSED
APPROVAL WITHDRAWN
PRODUCTION DEFINITELY DISCONTINUED
of a vehicle type pursuant to Regulation No. 122
Approval No. ................................... Extension No. ...........................................
Reason for extension: ....................................................................................................................................
SECTION I
GENERAL
1.1. Make (trade name of manufacturer): ................................................................................................
1.2. Type: .................................................................................................................................................
1.3. Means of identification of type, if marked on the vehicle/component/ separate technical unit :
...........................................................................................................................................................
1.3.1. Location of that marking: ..................................................................................................................
1.4. Category of vehicle : ......................................................................................................................
1.5. Name and address of manufacturer: ................................................................................................
...........................................................................................................................................................

APPENDIX 2
(Maximum format: A4 (210 mm x 297 mm))
COMMUNICATION
Issued by:
Name of administration
.....................................
.....................................
.....................................
concerning:
APPROVAL GRANTED
APPROVAL EXTENDED
APPROVAL REFUSED
APPROVAL WITHDRAWN
PRODUCTION DEFINITELY DISCONTINUED
of a vehicle type pursuant to Regulation No. 122
Approval No. ................................... Extension No. ...........................................
Reason for extension: ....................................................................................................................................
SECTION I
GENERAL
1.1. Make (trade name of manufacturer): ................................................................................................
1.2. Type: .................................................................................................................................................
1.3. Means of identification of type, if marked on the device : ..............................................................
1.3.1. Location of that marking: ..................................................................................................................
1.4. Name and address of manufacturer: ................................................................................................
1.5. Location of the ECE approval mark: .................................................................................................
1.6. Address(es) of assembly plant(s): ....................................................................................................
...........................................................................................................................................................

ANNEX 2
ARRANGEMENTS OF APPROVAL MARKS
Model A
(See Paragraph 4.5. of this Regulation)
a = 8 mm min
The above approval mark affixed to a heating system shows that the component type concerned has, with
regard to its constructional features, been approved in the Netherlands (E 4) pursuant to
Regulation No. 122 under approval number 002439. The approval number indicates that the approval was
granted according to the requirements of Regulation No. 122 in its original form.
Model B
(See Paragraph 4.4. of this Regulation)
a = 8 mm min
The above approval mark affixed to a vehicle shows that the vehicle type concerned has, with regard to its
heating system(s), been approved in the Netherlands (E 4) for Class III, pursuant to Regulation No. 122.
The number 00 indicates that the approval was granted according to the requirements of
Regulation No. 122 in its original form.

ANNEX 3
REQUIREMENTS FOR WASTE HEATING SYSTEMS − AIR
1. The requirements set out in Paragraph 6.2. of this Regulation are considered satisfied in respect of
heating systems which include a heat exchanger, the primary circuit of which is passed over by
exhaust gases or polluted air, provided that the following conditions are satisfied:
2. The walls of the primary circuit of the heat exchanger must be leak tight at any pressure up to and
including 2 bar;
3. The walls of the primary circuit of the heat exchanger must not include any detachable component;
4. The wall of the heat exchanger where the exchange of heat takes place must be at least 2 mm
thick if made of non-alloy steels;
4.1. In cases where other materials are used (including composite or coated materials), the thickness
of the wall must be such as to ensure that the heat exchanger has the same service life as in the
case referred to in Paragraph 4;
4.2. If the wall of the heat exchanger where the exchange of heat takes place is enamelled, the wall
where such enamel has been applied must be at least 1 mm thick and this enamel must be
durable, leak tight and not porous;
5. The pipe conducting the exhaust gases must include a corrosion test zone at least 30 mm long,
this zone being situated directly downstream of the heat exchanger, uncovered and easily
accessible;
5.1. The wall of this corrosion test zone must not be thicker than the pipes for the exhaust gases
situated inside the heat exchanger and the materials and surface properties of this section must be
comparable with those of these pipes;
5.2. If the heat exchanger forms a single unit with the vehicle exhaust silencer, the external wall of the
latter must be regarded as the zone complying with Point 5.1 where any corrosion should occur.
6. In the case of waste heat heating systems using the cooling air of the engine for heating purposes,
the conditions of Paragraph 6.2. of this Regulation are considered satisfied without the use of a
heat exchanger provided that the following conditions are satisfied:
6.1. The cooling air which is used for heating purposes comes into contact only with surfaces of the
engine which do not include any detachable part, and
6.2. The connections between the walls of this cooling air circuit and the surfaces used for the transfer
of heat are gastight and oil-resistant.
These conditions are considered satisfied if, for example:


a sheath around each sparking plug draws off any gas leaks outside the heating air circuit;
the joint between the cylinder head and the exhaust manifold is situated outside the
heating air circuit;

ANNEX 4
TEST PROCEDURE FOR AIR QUALITY
1. In the case of vehicle type-approval the following test shall be carried out:
1.1. Operate the heater for one hour at maximum output in conditions of still air (wind speed
≤ 2 m/s), with all windows closed and, in the case of a combustion heater, the propulsion
engine switched off. If, however, having selected the maximum output the heater switches off
automatically in less than an hour, the measurements may be made before switch-off.
1.2. The proportion of CO in the ambient air shall be measured by taking samples from:
1.2.1. A point outside the vehicle as close as possible to the heating air inlet, and
1.2.2. A point inside the vehicle less than 1 m from the heated air outlet.
1.3. Readings shall be taken for a representative time of ten minutes.
1.4. The reading from position described in Paragraph 1.2.2. shall be less than 20 ppm CO higher
than from position described in Paragraph 1.2.1.
2. In the case of type-approval of heaters as components the following test shall be carried out
after the tests of Annexes 5, 6 and Paragraph 1.3. of Annex 7.
2.1. The primary circuit of the heat exchanger shall be subjected to a leakage test to ensure that
polluted air cannot enter the heated air intended for the passenger compartment.
2.2. This requirement shall be considered to be fulfilled if, at a gauge pressure of 0,5 hPa, the
leakage rate from the heat exchanger is less than or equal to 30 dm /h.

ANNEX 6
TEST PROCEDURE FOR EXHAUST EMISSION OF COMBUSTION HEATERS
1. Operate heater for one hour at maximum output in conditions of still air (wind speed ≤ 2 m/s) and
an ambient temperature of 20 ± 10° C. If, however, having selected the maximum output the
heater switches off automatically in less than an hour, the measurements may be made before
switch-off.
2. The dry and undiluted exhaust emissions, measured using an appropriate meter, shall not
exceed the values indicated in the following table:
Parameter
Heaters using gaseous fuels
Heaters using liquid fuel
CO
0.1% vol.
0.1% vol.
NO
200 ppm
200 ppm
HC
100 ppm
100 ppm
Bacharach reference unit
1
4
3. The test shall be repeated in conditions equivalent to a vehicle speed of 100 km/h (or maximum
design speed of the vehicle in cases where the maximum speed is less than 100 km/h). Under
these conditions the CO value must not exceed 0.2% vol. If the test has been carried out on the
heater as a component, then it need not be repeated in the case of the vehicle type in which the
heater is installed.

ANNEX 8
SAFETY REQUIRMENTS FOR LPG COMBUSTION HEATERS AND LPG HEATING SYSTEMS
1. LPG HEATING SYSTEMS FOR ROAD USE IN MOTOR VEHICLES AND THEIR
TRAILERS
1.1. If an LPG heating system in a motor vehicle or trailer can also be used when the vehicle is
in motion, the LPG combustion heater and its supply system shall comply with the following
requirements:
1.1.1. The LPG combustion heater shall comply with the requirements of the harmonized standard
EN 624:2011 (Specifications for dedicated LPG appliances. Room sealed LPG space
heating equipment for installation in vehicles and boats).
1.1.2. In cases of a permanently installed LPG container all components of the system that are in
contact with LPG in the liquid phase (all components from the filling unit to the
vaporiser/pressure regulator) and the associated liquid phase installation shall comply with
the technical requirements of Regulation No. 67, Parts I and II and Annexes 3 to 10, 13 and
15 to 17. However, the installation of a LPG container in vehicles of Category O shall
comply with the technical requirements of the harmonized standard EN 1949:2011.
1.1.3. The gaseous phase installation of the LPG heating system in a vehicle shall comply with the
requirements of the harmonized standard EN 1949:2011. (Specifications for the
installation of LPG systems for habitation purposes in leisure accommodation vehicles and
in other road vehicles).
1.1.4. The LPG supply system shall be so designed that the LPG is supplied with the required
pressure and in the correct phase for the installed LPG combustion heater. It is permitted to
withdraw LPG from the permanently installed LPG container in either gaseous or liquid
phase. There shall be no connection of the gas installation between motor vehicle and
trailer.
1.1.5. The liquid outlet of the permanently installed LPG container to supply LPG to the heater
shall be provided with a remotely controlled service valve with excess flow valve as required
in Paragraph 17.6.1.1 of Regulation No. 67. The remotely controlled service valve with
excess flow valve shall be controlled such that it is automatically closed within five seconds
of the vehicle engine stopping, irrespective of the position of the ignition switch. If within
these five seconds the on-switch of the heater or LPG supply system is activated, the
heating system may stay in operation. The heating can always be restarted. This
paragraph does not apply to trailers. Trailers shall have a label in the vicinity of the filling
point which states to switch off the heater while refilling the permanently installed LPG
container.

ANNEX 9
ADDITIONAL PROVISIONS APPLICABLE TO CERTAIN VEHICLES AS SPECIFIED IN THE ADR
1. SCOPE
This Annex applies to certain vehicles for which the European Agreement concerning the
International Carriage of Dangerous Goods (ADR) contains specific requirements concerning
combustion heaters and their installation.
2. DEFINITIONS
For the purpose of this Annex, the vehicle designations EX/II, EX/III, AT, FL, OX and MEMU
are as defined in Chapter 9.1 of the ADR.
Vehicles approved as being in compliance with the requirements applicable to EX/III vehicles
under this Annex shall be deemed to comply with the requirements applicable to MEMU
vehicles.
3. TECHNICAL PROVISIONS
3.1. General (EX/II, EX/III, AT, FL, OX and MEMU Vehicles)
3.1.1. The combustion heaters and their exhaust gas routing shall be designed, located, protected
or covered so as to prevent any unacceptable risk of heating or ignition of the load. This
requirement shall be considered as fulfilled if the fuel tank and the exhaust system of the
appliance conform to the following provisions:

Any fuel tanks for supplying the appliance shall meet the following requirements:
(a)
(b)
In the event of any leakage, the fuel shall drain to the ground without coming into
contact with hot parts of the vehicle or the load;
Fuel tanks containing petrol shall be equipped with an effective flame trap at the
filler opening or with a closure enabling the opening to be kept hermetically
sealed.

The exhaust system as well as the exhaust pipes shall be so directed or protected to
avoid any danger to the load through heating or ignition. Parts of the exhaust system
situated directly below the fuel tank (diesel) shall have a clearance of at least 100 mm
or be protected by a thermal shield.
3.1.2. The combustion heater shall be switched on manually. Programming devices shall be
prohibited.
3.2. EX/II, EX/III and MEMU Vehicles
Combustion heaters using gaseous fuels are not permitted.

Heating Systems for Vehicles Categories M, N and O.