Regulation No. 115-00

Name:Regulation No. 115-00
Description:LPG and CNG Retrofit Systems.
Official Title:Uniform Provisions Concerning the Approval of: I. Specific LPG (Liquefied Petroleum Gases) Retrofit Systems to be Installed in Motor Vehicles for the Use of LPG in their Propulsion System; II. Specific CNG (Compressed Natural Gas) Retrofit Systems to be Installed in Motor Vehicles for the Use of CNG in their Propulsion System.
Country:ECE - United Nations
Date of Issue:2003-10-30
Amendment Level:00 Series, Supplement 7
Number of Pages:60
Vehicle Types:Bus, Car, Component, Heavy Truck, Light Truck
Subject Categories:Miscellaneous
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Keywords:

system, type, vehicle, retrofit, lpg, cng, regulation, approval, test, petrol, power, paragraph, fuel, vehicles, installation, requirements, parent, series, manual, amendments, container, tests, emissions, pressure, make, original, description, number, installed, engine, systems, annex, specific, calculated, drawings, valve, manufacturer, reference, gas, pollutant, mass, emission, components, case, ratio, adjustment, operating, equipment, date, approved

Text Extract:

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E/ECE/324
) Rev.2/Add.114/Rev.1/Amend.2
E/ECE/TRANS/505 )
February 22, 2017
STATUS OF UNITED NATIONS REGULATION
ECE 115-00
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF:
I. SPECIFIC LPG (LIQUEFIED PETROLEUM GASES) RETROFIT SYSTEMS TO BE
INSTALLED IN MOTOR VEHICLES FOR THE USE OF LPG IN THEIR PROPULSION
SYSTEMS;
II.
SPECIFIC CNG (COMPRESSED NATURAL GAS) RETROFIT SYSTEMS TO BE
INSTALLED IN MOTOR VEHICLES FOR THE USE OF CNG IN THEIR PROPULSION
SYSTEMS;
Incorporating:
00 series of amendments
Date of Entry into Force: 30.10.03
Corrigendum 1 to the 00 series of amendments
Dated: 01.08.06
Supplement 1 to the 00 series of amendments
Date of Entry into Force: 09.11.05
Corrigendum 1 to Supplement 1 to the 00 series of amendments
Dated: 21.12.05
Supplement 2 to the 00 series of amendments (including Erratum)
Date of Entry into Force: 18.01.06
Supplement 3 to the 00 series of amendments
Date of Entry into Force: 11.07.08
Supplement 4 to the 00 series of amendments
Date of Entry into Force: 19.08.10
Corrigendum 1 to Supplement 4 to the 00 series of amendments
Dated: 05.01.12
Supplement 5 to the 00 series of amendments
Date of Entry into Force: 15.07.13
Supplement 6 to the 00 series of amendments
Date of Entry into Force: 10.06.14
Supplement 7 to the 00 series of amendments
Date of Entry into Force: 09.02.17

REGULATION No. 115-00
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF:
I. SPECIFIC LPG (LIQUEFIED PETROLEUM GASES) RETROFIT SYSTEMS TO BE INSTALLED
IN MOTOR VEHICLES FOR THE USE OF LPG IN THEIR PROPULSION SYSTEM;
II.
SPECIFIC CNG (COMPRESSED NATURAL GAS) RETROFIT SYSTEMS TO BE INSTALLED IN
MOTOR VEHICLES FOR THE USE OF CNG IN THEIR PROPULSION SYSTEM;
CONTENTS
REGULATION
1. Scope
2. Definitions
3. Application for approval
4. Markings
5. Approval
6. Specifications regarding the retrofit systems
7. Instruction manuals
8. Modification and extension of approval of a retrofit system type
9. Conformity of production
10. Penalties for non-conformity of production
11. Production definitively discontinued
12. Names and addresses of technical services responsible for conducting approval tests, and of Type
Approval Authorities

REGULATION NO. 115-00
1. SCOPE
This Regulation applies to:
1.1.
Part I:
Specific LPG retrofit systems to be installed in motor vehicles for the use of LPG in
the propulsion system.
Part II:
Specific CNG retrofit systems to be installed in motor vehicles for the use of CNG
in the propulsion system.
1.2. This Regulation applies when the retrofit systems manufacturer keep the initial
characteristics of the whole system, for the specific vehicle family for which the approval has
been granted.
1.3. This Regulation does not apply to the procedures, checks and inspections aimed at verifying
the correct installation of the retrofit systems on vehicles, since this matter relies on the
competence of the Contracting Party of Country where the vehicle is registered.
1.4. This Regulation applies to retrofit systems intended to be fitted on vehicles of Categories M
and N , with the exception of:
a) Vehicles type-approved pursuant to Regulation No. 83, series of amendments 00 or
01 or 02 or 03 or 04 series,
b) Vehicles type-approved pursuant to Regulation No. 49, series of amendments 00 or
01 or 02 or 03 series,
c) Vehicles type-approved pursuant to EC Directive 70/220/EEC up to and including the
amending Directive 96/69/EC,
d) Vehicles type-approved pursuant to EC Directive 88/77/EEC up to and including the
amending Directive 96/1/EC
1.5. The requirements for the different Categories (M , N or others) are defined in Paragraphs 2
to 7 .
Once the retrofit system is installed in the vehicle, the modified vehicle shall fulfil all the
provisions of the Regulation for which the type approval has been initially granted.

2.2.9. Installation manual (see Paragraph 7);
2.2.10. End-user manual (see Paragraph 7).
2.3. "System Manufacturer" means an organisation which can assume technical responsibility
for the manufacturing of LPG and CNG retrofit systems and can demonstrate that it
possesses the features required and the necessary means to achieve quality assessment
and conformity of production of the retrofit system.
2.4. "Installer" means an organisation which can assume technical responsibility for the correct
and safe installation of the approved LPG and CNG retrofit system, in conformity with
respectively Paragraphs 6.1.1.3 and 6.2.1.3 of this Regulation .
2.5. For the purposes of this Regulation, "the Parent Vehicle", with regard both to LPG system
and to CNG system, means a vehicle that is selected to act as the vehicle, on which the
requirements of this Regulation are going to be demonstrated, and to which the members of
a family refer.
2.5.1. According to this Regulation, "a member of the family" is a vehicle sharing the following
essential characteristics with its parent vehicle:
The family definition is based on the original vehicle characteristics.
2.5.1.1. a) It is produced by the same vehicle manufacturer.
b) It is classified in the same Category M or M or M or N or N or N . Vehicles of
Category M and N Class I may belong to the same family.
c) It is subject to the same emission limits or those specified in earlier series of
amendments of the applicable Regulation.
d) If the gas fuelling system has a central metering for the whole engine: it has an
approved power output between 0.7 and 1.15 times that of the engine of the parent
vehicle. If the gas fuelling system as an individual metering per cylinder: it has an
approved power output per cylinder between 0.7 and 1.15 times that of the engine of
the parent vehicle.
e) Fuel feed and combustion process (injection: direct or indirect, single-point or
multi-point)

3.2.3. Description of all modifications applied to the original parent vehicle, only in case of bi-fuel
configuration;
3.2.4. Verification of compliance with the specifications prescribed in Paragraph 6 of this
Regulation;
3.2.5. If needed for the purpose of Paragraph 5.2, notice of approval of the retrofit system for a
parent vehicle which is different from those the approval is applied for, certifying that the
retrofit system has been approved as a "master slave" system, as defined in
Paragraph 2.1.5.
3.3. Installation manual(s) for the retrofit system installation on the parent vehicle(s).
3.4. End-user manual
3.5. A sample of the specific retrofit system, properly installed in the parent vehicle(s).
4. MARKINGS
4.1. The sample(s) of a specific retrofit system submitted to type-approval shall be accompanied
by a plate with the trade name or mark of the retrofit manufacturer and the type, as indicated
in Annexes 2A and 2B.
4.2. All retrofit systems, installed in the vehicle belonging to the family, as defined in Paragraph 2
of this Regulation, shall be identified by a plate, in which the approval number, and the
technical specifications, as required in Annexes 2A and 2B shall be placed. This plate has to
be permanently fixed to the structure of the vehicle and shall be clearly readable and
indelible.
5. APPROVAL
5.1. If the retrofit system sample submitted for approval meets the requirements of Paragraph 6
of this Regulation, the type approval of the retrofit system shall be granted.
5.2. Retrofit systems, which have already been approved as "master slave" systems on at least
one parent vehicle, do not need to comply with Paragraph 6.1.4.4.2.1. or 6.2.4.4.2.1. of this
Regulation.
5.3. An approval number shall be assigned to each type of the retrofit system approved. Its first
two digits (at present 00 according to the Regulation in its original form) shall indicate the
series of amendments incorporating the most recent major technical amendments made to
the Regulation at the time of issue of the approval. The same Contracting Party shall not
assign the same type approval number to another type of retrofit system.
5.4. Notice of approval or of refusal or of extension of approval of a retrofit system type/part
pursuant to this Regulation shall be communicated to the Parties to the Agreement applying
this Regulation, by means of a form conforming to the model in Annexes 1A and 1B to this
Regulation.

6.1.2. Pollutants Emissions and CO Emissions (for Category M and N Vehicles only)
6.1.2.1. One LPG retrofit system sample, as described in Paragraph 2.2. of this Regulation, installed
into the parent vehicle(s), as described in Paragraph 2.5. of this Regulation, shall be
submitted to the test procedures described in Regulations No. 83 and No. 101, or
No. 49, where applicable, in the limits of the requirements of Paragraphs 6.1.2.4 and
6.1.2.5. The vehicles and/or the engines are also submitted to a maximum power
comparison test, as described in Regulation No. 85 for engines, or defined in
Paragraph 6.1.3. below for vehicles.
6.1.2.2. Fuel requirements by the engine: the type of fuel normally used by the engine could be:
(a)
(b)
(c)
LPG only (mono-fuel);
Either unleaded petrol (petrol mode) or LPG (LPG mode) in case of bi-fuel;
Both diesel fuel or diesel fuel and LPG (dual fuel)
(Provisions for dual fuel have still to be defined).
6.1.2.3. "Pollutants" means:
(a)
(b)
Carbon monoxide
Hydrocarbons assuming a ratio:
CH for petrol
CH for diesel fuel
CH for LPG
CH (to be defined)
for dual fuel;
(c)
(d)
Oxides of nitrogen, the latter being expressed in nitrogen dioxide (NO ) equivalent.
Particulates, etc.

6.1.2.4.1.2.2. Using of the table values:
(a)
(b)
(c)
(d)
The parent vehicle mass shall be measured with the retrofit system installed on
the vehicle including the LPG tank fully filled up or shall be calculated as the sum
of the original vehicle reference mass and the mass of the retrofit system with the
LPG tank fully filled up;
The inertia mass of the parent vehicle shall be determined according to the mass
of the retrofitted vehicle;
The coefficient a shall be the one corresponding to the reference mass of the
retrofitted vehicle;
The coefficient b shall be the one corresponding to the reference mass of the
original vehicle.
6.1.2.4.1.3. Exhaust emissions test in petrol mode
Subject to the requirements of Paragraph 6.1.2.4.1.5., below, the tests shall be repeated
three times using reference petrol. The parent vehicle(s), equipped with the retrofit
system, shall comply with the limit values according to the type approval of the original
vehicle(s) including the deterioration factors applied during the type approval of the
original vehicle(s).
6.1.2.4.1.4. Notwithstanding the requirements of Paragraph 6.1.2.4.1.3. above, for each pollutant or
combination of pollutants, one of the three test results may exceed, by not more than
10%, the limit prescribed, provided that the arithmetical mean of the three results is
below the prescribed limit. Where the prescribed limits are exceeded for more than one
pollutant, it is immaterial whether this occurs in the same test or in different tests.
6.1.2.4.1.5. The number of emission tests prescribed in Paragraph 6.1.2.4.1.3. may be reduced
under the following conditions:
(a)
(b)
One test is required if the result obtained for each pollutant subject to limitation is
less than or equal to 0.7 the emission limit (i.e. V1 ≤ 0.70 G);
Two tests are required if, for each pollutant subject to limitation the following
requirements are met:
V1 ≤ 0.85 G and V1 + V2 ≤ 1.70 G and V2 ≤ G
where:
V1
V2
G
value of the emission of one pollutant obtained from the first test of the
Type I performed;
value of the emission of one pollutant obtained from the second test of the
Type I performed;
limit value of the emissions of one pollutant (CO/HC/NO ) according to the
type approval of the vehicle(s) divided by the deterioration factors.

6.1.2.4.1.8. The number of emission tests prescribed in Paragraph 6.1.2.4.1.6. on each LPG
reference fuel may be reduced under the following conditions:
(a)
(b)
One test is required if the result obtained for each pollutant or for the combined
emission of two pollutants subject to limitation is less than or equal to 0.7 the
emission limit (i.e. M ≤ 0.70 G);
Two tests are required if, for each pollutant or for the combined emission of two
pollutants subject to limitation the following requirements are met:
M ≤ 0.85 G and M + M ≤ 1.70 G and M ≤ G
where:
M :
M :
value of the emission of one pollutant obtained from the first test of the
Type I performed;
value of the emission of one pollutant obtained from the second test of the
Type I performed;
G: limit value of the emissions of one pollutant (CO/HC/NO ) or the sum of two
pollutants (HC + NO ) according to the type approval of the vehicle(s)
divided by the deterioration factors.
6.1.2.4.2. Specific requirements on the Type II test (carbon monoxide emission test at idling speed)
for vehicles having a maximum mass exceeding 3,500kg:
6.1.2.4.2.1. One LPG retrofit system sample, as described in Paragraph 2.2. of this Regulation,
installed into the parent vehicle, as described in Paragraph 2.5. of this Regulation, shall
be submitted to the Type II test procedures described in Regulation No. 83 .
6.1.2.4.2.2. Notwithstanding the provisions of Regulation No. 83 , the Type II test shall be
performed at the request of the system manufacturer with only one LPG reference fuel
chosen at the discretion of the type approval Technical Service responsible for the test.

6.1.3. Power Requirements
The parent vehicle(s) or engine(s) are submitted to the tests as follows:
6.1.3.1. One LPG retrofit system sample as described in Paragraph 2.2. of this Regulation, installed
in the parent vehicle(s) or on the parent engine(s) shall be submitted to the test procedures
of Paragraph 6.1.3.2. or 6.1.3.3. The measured power with LPG shall be lower than that
measured with petrol +5%.
6.1.3.2. Chassis dynamometer method:
The maximum power at the wheels is measured on a chassis dynamometer on each parent
vehicle with the following fuels:
(a)
reference petrol,
(b) reference LPG A or B,
The mean of power measurements shall be calculated as follows:
Power

= 1/ n Power
Power

= 1/ n Power
The ratio of engine power shall be calculated as follows:
K = Power / Power
For each vehicle of the family, the official values of engine power are multiplied by the
above ratio.

6.1.4.4. Specific OBD requirements and tests for "master-slave" retrofit system:
6.1.4.4.1. Notwithstanding the requirements of the Paragraph 6.1.4.3, a "master-slave" retrofit system
shall fulfil the following requirements:
(a)
(b)
(c)
(d)
The petrol ECU shall remain activated for engine management in both petrol and LPG
modes
During petrol operations the petrol OBD system shall remain the only on-board
diagnostic system of the vehicle
During LPG operations the petrol OBD system shall continue to monitor original
emission related components with the exception of those which are not in use
During LPG operations the LPG ECU shall only monitor for the LPG emission-related
components as well as their electrical connections;
6.1.4.4.2. Notwithstanding the requirements of Paragraph 6.1.4.3. above, the LPG retrofit system shall
be submitted to the following tests, which, in the case of Type I tests, shall be performed
according to Regulation No. 83 .
6.1.4.4.2.1. The following tests shall be carried out on one parent vehicle, equipped with the LPG retrofit
system:
(a)
(b)
(c)
The LPG ECU shall follow the petrol ECU on fuel strategies (e.g. injection). This can
be demonstrated by a monitoring (diagnostic) programme, while modifying the signal
of one of the petrol system's sensors with an impact on the injection time;
During a Type I test on petrol the original malfunction indicator (MI) shall activate due
to the electrical disconnection of any original emission-related component;
During a Type I test on LPG the original MI shall activate due to the electrical
disconnection of any original emission-related component, which is in use during LPG
operations.
6.1.4.4.2.2. The following tests shall be carried out on the parent vehicle(s), equipped with the LPG
retrofit system, only on LPG operating mode:
(a)
(b)
During a Type I test, electrical disconnection of one LPG emission-related
component;
During a Type I, test replacement of one LPG emission-related component with a
deteriorated and defective one or electronic simulation of such a failure.
The original MI or automatic switch from LPG mode to petrol mode shall activate before the
end of the tests under any of the conditions above.
6.1.4.4.2.3. Fault codes due to malfunctions of the LPG emission-related components and their
electrical connections shall be stored in the LPG ECU.
6.1.4.4.2.4. The system manufacturer shall provide specific instructions as to read out the LPG fault
codes referred to in Paragraph 6.1.4.4.2.3.

6.2.2.3. "Pollutants" means:
(a)
(b)
Carbon monoxide
Hydrocarbons assuming a ratio:
CH for petrol
CH for diesel fuel
CH
CH
for CNG
(to be defined) for dual fuel;
(c)
(d)
oxides of nitrogen, the latter being expressed in nitrogen dioxide (NO ) equivalent;
particulates, etc.
6.2.2.4. Exhaust emissions (M and N Categories of vehicles and CO emissions M Category
vehicles):
6.2.2.4.1. Specific requirements on the Type I test (verifying the average exhaust emissions after a
cold start):
6.2.2.4.1.1. Measurements of tailpipe emissions shall be performed after a cold start with each fuel:
(a)
(b)
(c)
Reference petrol,
Reference G20 fuel,
Reference G25 fuel.
The emissions of CO, HC, NO and HC + NO are calculated according to
Regulation No. 83 .

6.2.2.4.1.3. Exhaust emissions test in petrol mode
Subject to the requirements of Paragraph 6.2.2.4.1.5. below the tests shall be repeated
three times using reference petrol. The parent vehicle(s), equipped with the retrofit
system, shall comply with the limit values according to the type approval of the original
vehicle(s) including the deterioration factors applied during the type approval of the
original vehicle(s).
6.2.2.4.1.4. Notwithstanding the requirements of Paragraph 6.2.2.4.1.3. above, for each pollutant or
combination of pollutants, one of the three test results may exceed, by not more than
10%, the limit prescribed, provided that the arithmetical mean of the three results is
below the prescribed limit. In this case the prescribed limits may be exceeded for more
than one pollutant in the same test or in different tests.
6.2.2.4.1.5. The number of emission tests prescribed in Paragraph 6.2.2.4.1.3. above may be
reduced under the following conditions:
(a)
(b)
One test is required if the result obtained for each pollutant subject to limitation is
less than or equal to 0.7 the emission limit (i.e. V1 ≤ 0.70 G),
Two tests are required if, for each pollutant subject to limitation the following
requirements are met:
V1 ≤ 0.85 G and V1 + V2 ≤ 1.70 G and V2 ≤ G
where:
V1
V2
G
value of the emission of one pollutant obtained from the first test of the
Type I performed;
value of the emission of one pollutant obtained from the second test of the
Type I performed;
limit value of the emissions of one pollutant (CO/HC/NO ) according to the
type approval of the vehicle(s) divided by the deterioration factors.
6.2.2.4.1.6. Exhaust emissions test in CNG mode
Subject to the requirements of Paragraph 6.2.2.4.1.8. below, the tests shall be repeated
three times with each reference CNG. The parent vehicle(s), equipped with the retrofit
system, shall comply with the limit values according to the type approval of the original
vehicle(s) including the deterioration factors applied during the type approval of the
original vehicle(s).
If the parent vehicle(s) complies with Regulation No. 83, 05 series of amendments, or
with Directive 98/69/EC, or with Regulation No. 49, 04 series of amendments, or with
Directive 1999/96/EC, the vehicle shall not use petrol for more than a maximum of 90s
during each test.
For vehicles complying with later series of amendments to Regulations Nos. 83 and 49,
or later amending Directives or European Regulations, this period shall not exceed 60s.

6.2.2.4.2. Specific requirements on the Type II test (carbon monoxide emission test at idling speed)
for vehicles having a maximum mass exceeding 3,500kg:
6.2.2.4.2.1. One CNG retrofit system sample, as described in Paragraph 2.2. of this Regulation,
installed into the parent vehicle, as described in Paragraph 2.5. of this Regulation, shall
be submitted to the Type II test procedures described in Regulation No. 83 .
6.2.2.4.2.2. Notwithstanding the provisions of Regulation No. 83 the Type II test shall be performed
at the request of the system manufacturer with only one CNG reference fuel chosen at
the discretion of the type approval technical service responsible for the test.
6.2.2.4.3. Calculation of the CO emissions and fuel consumption (for M and N categories of
vehicles)
6.2.2.4.3.1. The emissions of CO are calculated according Regulation No. 101 for each parent
vehicle, if applicable.
The mean of CO emissions shall be calculated as follows:
CO = 1/ n ∑ +
( CO CO )/
2
CO

= 1/ n CO
where:
i: number of parent vehicles (i = 1 to n)
CO
:
mean value of the emissions of CO obtained from the three Type I tests
with the retrofit system and with CNG G20 for vehicle No. i,
CO
:
mean value of the emissions of CO obtained from the three Type I tests
with the retrofit system and with CNG G25 for vehicle No. i,
CO
:
mean value of the emissions of CO obtained from the three Type I tests
with reference petrol for vehicle No. i.
6.2.2.4.3.2. The mean fuel consumption shall be calculated in the same way as for the mean of CO
emissions, as defined in Paragraph 6.2.2.4.3.1. above.
6.2.2.4.3.3. The ratios of CO emissions and fuel consumption shall be calculated as follows:
K = CO / CO
K = Cons / Cons
For each vehicle of the family, the official values of CO emissions and fuel consumption
are multiplied by the above ratios.

6.2.3.3. Engine dynamometer method:
The maximum power at the crankshaft is measured on an engine dynamometer
according to Regulation No. 85 for each parent vehicle(s) with the following fuels:
(a)
(b)
Commercial petrol or diesel fuel,
Commercial CNG,
The mean of power measurements shall be calculated as follows:
Power
Power

= 1/ n Power

= 1/ n Power
The ratio of engine power shall be calculated as follows:
K = Power / Power
For each vehicle of the family, the official values of engine power are multiplied by the
above ratio.
6.2.4. OBD Requirements and Tests for Vehicles Retrofitted with CNG Retrofit System
6.2.4.1. For the purposes of this Paragraph, the following definitions apply:
6.2.4.1.1. "Original emission-related component" means any component in the air inlet, exhaust or
evaporative system which supplies an input to or receives an output from the petrol
controller;
6.2.4.1.2. "CNG emission-related component" means any component in the air inlet or in the
exhaust system which supplies an input to or receives an output from the CNG
controller.
6.2.4.2. In the case that there is a need, to fit properly the CNG retrofit system in the vehicle, it is
allowed to simulate the right operation of the original emission-related components which
are not in use on CNG mode.
6.2.4.3. The CNG retrofit system, as described in Paragraph 2.2. of this Regulation, installed into
the parent vehicle(s), shall comply with the requirements and tests of
Regulation No. 83 on both petrol and CNG modes.

6.2.4.4.2.3. Fault codes due to malfunctions of the CNG emission-related components and their
electrical connections shall be stored in the CNG ECU.
6.2.4.4.2.4. The system manufacturer shall provide specific instructions as to read out the CNG fault
codes referred to in Paragraph 6.2.4.4.2.3. above.
7. INSTRUCTION MANUALS
7.1. Installation Manual for the Retrofit Installation on the Vehicle
7.1.1. Scope
The scope of this Paragraph is to list the minimum requirements which shall be
contained in the installation manual.
7.1.2. List of Reference Standards:
7.1.3. General Requirements
7.1.3.1. The installation manual has the purpose to guide the installer through the correct
procedures which shall be observed while assembling the LPG/CNG systems.
7.1.3.2. The installation manual shall be prepared by the retrofit system manufacturer.
7.1.3.3. The installation manual is part of the retrofit system and shall therefore be provided for
each conversion kit.
7.1.3.4. The installation manual shall be written in the language of the country to which the
conversion retrofit will be delivered, or at least in English.
7.1.3.5. The installation manual can be divided in two parts:
Part I: (a) Part containing the description of the sample of retrofit system;
(b)
Part containing the list of components indicated by the retrofit
manufacturer as alternatives.
Part II:
Part containing installation instructions for the specific vehicle.
7.1.3.6. Installation manual of the parent vehicle(s) has to be submitted to the Type Approval
Authority that grants the type approval.
7.1.3.7. Installation manual of the vehicles belonging to the family has to be filed by the retrofit
system manufacturer for a time to be determined in accordance with the Type Approval
Authority that grants the type approval.
7.1.4. Contents of Part I, Section (a) of Installation Manual
7.1.4.1. Retrofit system description:
7.1.4.1.1. Operational principles of the retrofit system
7.1.4.1.2. Operational principles of each component of the retrofit system

7.1.5.1.11. General scheme of the retrofit system containing the following information of each
component:
(a)
(b)
(c)
(d)
Identification number
Manufacturer's code
Type approval, it is exists
For the containers: capacity/manufacturer/type/date of expiry or replacement date,
if it exists
7.1.5.1.12. Description (including drawings, if applicable) of the fitting devices of the container
installation on the vehicle.
7.1.5.2. Installation Instructions
7.1.5.2.1. Assembly instructions of all components together with diagrams or photographs showing
clearly the layout of the single components within the engine compartment.
7.1.5.2.2. Diagram or photograph showing the exact position where the installer shall place the
retrofit system type approval plate (contained in the conversion kit).
7.1.5.2.3. Clear wiring diagram of the electrical system containing the mechanical components to
which the wires shall be connected.
7.2. End-User Manual
7.2.1. Scope
To specify the minimum requirements of the end-user manual for LPG/CNG systems
maintenance.
7.2.2. General Requirements
7.2.2.1. The user manual has the purpose to inform the end-user about the characteristics and
safety features of the installed LPG/CNG systems.
7.2.2.2. The user manual shall be prepared by the manufacturer of the retrofit system.
7.2.2.3. The manufacturer of the system shall include all the necessary information that is
needed for correct use and safe operation of the LPG/CNG systems.
7.2.2.4. The user manual shall be considered as an integral part of the system and therefore be
delivered with the LPG/CNG systems.
7.2.2.5. The user manual shall be written in the language of the country to which the system is
delivered.
7.2.2.6. The user manual shall indicate reference to the product type and version and production
year for which it is applicable.
7.2.2.7. Information shall be given for relevant extreme ambient conditions.

7.2.3.5.3. Opening/closing of manual valves
7.2.3.5.4. Level indicator
7.2.3.5.5. Maintenance
When fitted, the user manual shall indicate the proper procedure to operate the manual
valves.
The user manual shall state the location of the level indicator, for example at the
dashboard or at the container. Its read-out has to be clearly explained to the user, giving
particular attention to the 80% filling level in case of LPG.
If maintenance is required, the user manual shall state the frequency and type of
maintenance to be carried out.
7.2.3.5.6. Defects and repair
The user manual shall indicate which actions have to be taken in the case of a defect of
the system.
When the system is equipped with a diagnosis system the user manual shall describe
this system and indicate proper actions to be taken.
7.2.3.5.7. Scrapping of the product
The user manual shall give proper indication about precautions to be taken when the
system has to be removed from the vehicle.
8. MODIFICATION AND EXTENSION OF APPROVAL OF A RETROFIT SYSTEM TYPE
8.1. Every modification of the installation of the specific equipment for the use of LPG or CNG
in the propulsion system of the vehicle shall be notified to the Type Approval Authority,
which granted the retrofit system type approval. The Authority may then either:
8.1.1. Consider that the modifications made are unlikely to have an appreciably adverse effect
and that in any case the retrofit system still complies with the requirements; or
8.1.2. Require a further test report from the technical service responsible for conducting the
tests.
8.2. In both cases described in Paragraphs 8.1.1. and 8.1.2. above, the Authority shall be
presented in the updated installation manual.
8.3. Confirmation or refusal of approval, specifying the alteration, shall be communicated by
the procedure specified in Paragraph 5.4. above to the Parties to the 1958 Agreement
applying this Regulation.
8.4. The Type Approval Authority issuing the extension of approval shall assign a series
number for such an extension and inform thereof the other Parties to the 1958
Agreement applying to this Regulation by means of a communication form conforming to
the model in Annexes 1A and/or 1B to this Regulation.

ANNEX 1A
COMMUNICATION
(maximum format: A4 (210 × 297mm))
issued by:
Name of administration:
.............................................
.............................................
.............................................
concerning:
APPROVAL GRANTED
APPROVAL EXTENDED
APPROVAL REFUSED
APPROVAL WITHDRAWN
PRODUCTION DEFINITIVELY DISCONTINUED
of a type of LPG retrofit equipment pursuant to Regulation No. 115
Approval No.: ........................................... Extension No.: ................................................
1. LPG retrofit equipment considered:
Container
Accessories fitted to the container
80% stop valve
Level indicator
Pressure relief valve (discharge valve)
Pressure relief device
Remote controlled service valve with excess flow valve
With/without LPG fuel pump
Multivalve, including the following accessories: ........................................................................
Ventilation housing
Power supply bushing (pump/actuators)

11. Vehicle types in which the retrofit system can be installed (M and N Categories), or vehicle
types in which the retrofit system can be installed (other Categories of vehicles) and, if
applicable, CO and power ratios (see Addendum to this Annex) .................................................
........................................................................................................................................................
11.1. Emission requirements:
Regulation No. 83, ..... series of amendments
Regulation No. 49, ..... series of amendments
11.2. OBD requirements:
Has the retrofit system demonstrated to be "master-slave": yes/no
12. Place ..............................................................................................................................................
13. Date ................................................................................................................................................
14. Signature ........................................................................................................................................
15. The documents filed with the application or extension of approval can be obtained upon
request.

ANNEX 1B
COMMUNICATION
(maximum format: A4 (210 × 297mm))
issued by:
Name of administration:
.............................................
.............................................
.............................................
concerning:
APPROVAL GRANTED
APPROVAL EXTENDED
APPROVAL REFUSED
APPROVAL WITHDRAWN
PRODUCTION DEFINITIVELY DISCONTINUED
of a type of CNG retrofit equipment pursuant to Regulation No. 115
Approval No. ............................................ Extension No. .................................................
1. CNG equipment comprising:
Container
Accessories fitted to the container
Level or pressure indicator
Pressure relief valve (discharge valve)
Remote-controlled automatic valve with excess flow valve
Pressure relief device
Gas-tight housing
Pressure regulator
Automatic valve
Check valve
Flexible fuel line or hose
Filling unit

12. Place: .............................................................................................................................................
13. Date: ...............................................................................................................................................
14. Signature: .......................................................................................................................................
15. The documents filed with the application or extension of approval can be obtained upon
request.

ANNEX 2A
ARRANGEMENT OF THE LPG RETROFIT SYSTEM TYPE APPROVAL MARK
a = 8mm min.
The above approval mark affixed to the plate of LPG retrofit system, shows that it has been approved in
Italy (E3), pursuant to Regulation No. 115 under approval number 000000. The symbol "#" indicates the
LPG retrofit system, the first two digits of the approval number indicate that approval was granted in
accordance to the requirement of Regulation No. 115 in its original form.
The above plate, with approval mark and some technical information on the retrofit system, has to be
fixed permanently on the body of the vehicle.

ANNEX 3A
COMPLETE LIST OF INFORMATION FOR THE PURPOSE OF THE LPG RETROFIT SYSTEM
INSTALLED ON VEHICLE TYPE APPROVAL
1.
DESCRIPTION OF THE PARENT VEHICLE:
1.1.
Name and address of the manufacturer ......................................................................................
1.2.
Category and identification type ...................................................................................................
1.3.
Chassis identification number .......................................................................................................
1.4.
Certification number .....................................................................................................................
1.5.
Internal combustion engine identification type .............................................................................
1.5.1.
Working principle and thermodynamic cycle ................................................................................
1.5.2.
Naturally aspirated or pressure charged ......................................................................................
1.5.3.
Displacement ...............................................................................................................................
1.5.4.
Catalyst system type ...................................................................................................................
1.5.5.
Ignition system type .....................................................................................................................
2.
DESCRIPTION OF THE LPG RETROFIT SYSTEM:
2.1.
Trade name or mark holder .........................................................................................................
2.2.
Identification type .........................................................................................................................
2.3.
Drawing/flow-charts of the installation in the vehicle ...................................................................
2.4.
"Master-slave" system: yes/no
2.5.
Vaporiser/pressure regulator(s)
2.5.1.
Make(s) .........................................................................................................................................
2.5.2.
Type(s) .........................................................................................................................................
2.5.3.
Certification number ....................................................................................................................
2.5.4.
Identification .................................................................................................................................
2.5.5.
Drawings ......................................................................................................................................

2.8.
Gas injection device(s) or injector(s): yes/no
2.8.1.
Make(s) ........................................................................................................................................
2.8.2.
Type(s) .........................................................................................................................................
2.8.3.
Identification .................................................................................................................................
2.8.4.
Operating pressure(s):
........................................................................................................ kPa
2.8.5.
Drawings of installation ................................................................................................................
2.9.
Electronic control unit
2.9.1.
Make(s) ........................................................................................................................................
2.9.2.
Type(s) .........................................................................................................................................
2.9.3.
Place of installation ......................................................................................................................
2.9.4.
Adjustment possibilities ...............................................................................................................
2.10.
LPG container
2.10.1.
Make(s) ........................................................................................................................................
2.10.2.
Type(s) (include drawings) ..........................................................................................................
2.10.3.
Number of containers ..................................................................................................................
2.10.4.
Capacity ................................................................................................................................ litres
2.10.5.
LPG fuel pump in container: yes/no
.........................................................................................
2.10.6.
Certification number ....................................................................................................................
2.10.7.
Drawings of the installation of the container ................................................................................
2.11.
LPG container accessories:
2.11.1.
80% stop valve:
2.11.1.1.
Make(s) .........................................................................................................................................
2.11.1.2.
Type(s) ..........................................................................................................................................
2.11.1.3.
Operating principle: float/other
(include description or drawings) : .........................................

2.12.
Fuel pump (LPG): yes/no
2.12.1.
Make(s) ........................................................................................................................................
2.12.2.
Type(s) .........................................................................................................................................
2.12.3.
Pump mounted in LPG container: yes/no
2.12.4.
Operating pressure(s):
........................................................................................................ kPa
2.13.
Shut-off valve/ non-return valve/gas tube pressure relief valve: yes/no
2.13.1.
Make(s) ........................................................................................................................................
2.13.2.
Type(s) .........................................................................................................................................
2.13.3.
Description and drawings ............................................................................................................
2.13.4.
Operating pressure(s):
........................................................................................................ kPa
2.14.
Filling point:
2.14.1.
Make(s) ........................................................................................................................................
2.14.2.
Type(s) .........................................................................................................................................
2.14.3.
Description and drawings: ...........................................................................................................
2.15.
Flexible fuel hose(s)/pipes:
2.15.1.
Make(s) ........................................................................................................................................
2.15.2.
Type(s) .........................................................................................................................................
2.15.3.
Description ...................................................................................................................................
2.15.4.
Operating pressure(s):
........................................................................................................ kPa
2.16.
Pressure and temperature sensor(s):
2.16.1.
Make(s) ........................................................................................................................................
2.16.2.
Type(s) .........................................................................................................................................
2.16.3.
Description ...................................................................................................................................
2.16.4.
Operating pressure(s):
........................................................................................................ kPa

ANNEX 3B
COMPLETE LIST OF INFORMATION FOR THE PURPOSE OF THE
CNG RETROFIT SYSTEM INSTALLED ON VEHICLE TYPE APPROVAL
1. DESCRIPTION OF THE PARENT VEHICLE
1.1. Name and address of the manufacturer ......................................................................................
1.2. Category and identification type ..................................................................................................
1.3. Chassis identification number ......................................................................................................
1.4. Certification number ....................................................................................................................
1.5. Internal combustion engine identification type ............................................................................
1.5.1. Working principle and thermodynamic cycle ...............................................................................
1.5.2. Naturally aspirated or pressure charged .....................................................................................
1.5.3. Displacement ...............................................................................................................................
1.5.4. Catalyst system type ...................................................................................................................
1.5.5. Ignition system type .....................................................................................................................
2. DESCRIPTION OF THE CNG RETROFIT SYSTEM
2.1. Trade name or mark holder ..........................................................................................................
2.2. Identification type .........................................................................................................................
2.3. Drawing/flow-charts of the installation in the vehicle ...................................................................
2.4. "Master-slave" system: yes/no
2.5. Pressure regulator(s)
2.5.1. Make(s) ........................................................................................................................................
2.5.2. Type(s) ..........................................................................................................................................
2.5.3. Certification number ....................................................................................................................
2.5.4. Identification .................................................................................................................................
2.5.5. Drawings ......................................................................................................................................

2.8.3.
Identification .................................................................................................................................
2.8.4.
Operating pressure(s):
........................................................................................................ kPa
2.8.5.
Drawings of installation .................................................................................................................
2.9.
Electronic control unit
2.9.1.
Make(s) .........................................................................................................................................
2.9.2.
Type(s) ..........................................................................................................................................
2.19.3.
Place of installation .......................................................................................................................
2.9.4.
Adjustment possibilities ................................................................................................................
2.10.
CNG container
2.10.1.
Make(s) .........................................................................................................................................
2.10.2.
Type(s) (include drawings) ...........................................................................................................
2.10.3.
Number of containers ...................................................................................................................
2.10.4.
Total capacity ....................................................................................................................... litres
2.10.5.
Certification number .....................................................................................................................
2.10.6.
Drawings of the installation of the container .................................................................................
2.11.
CNG container accessories: ........................................................................................................
2.11.1.
Level or pressure indicator:
2.11.1.1
Make(s) .........................................................................................................................................
2.11.1.2.
Type(s) ..........................................................................................................................................
2.11.2.
Pressure relief valve (discharge valve):
2.11.2.1.
Make(s) .........................................................................................................................................
2.11.2.2.
Type(s) ..........................................................................................................................................
2.11.3
Pressure relief device:
2.11.3.1.
Make(s) .........................................................................................................................................
2.11.3.2
Type(s) ..........................................................................................................................................

2.16. CNG filter:
2.16.1. Make(s) .........................................................................................................................................
2.16.2. Type(s) ..........................................................................................................................................
2.16.3. Description ....................................................................................................................................
2.16.4. Operating pressure(s): ........................................................................................................ kPa
2.17. Service coupling(s) (mono-fuel vehicle without limp-home system):
2.17.1. Make(s) .........................................................................................................................................
2.17.2. Type(s) ..........................................................................................................................................
2.17.3. Description and drawings installation ...........................................................................................
2.18. Connection to CNG system for heating system (allowed for M and M Category of vehicles
only): yes/no
2.18.1. Make(s) .........................................................................................................................................
2.18.2. Type(s) ..........................................................................................................................................
2.18.3. Description and drawings installation ...........................................................................................
2.19. Further documentation: ...............................................................................................................
2.19.1. Description of the CNG equipment and the physical safeguarding of the catalyst at
switch-over from petrol to CNG or back: .....................................................................................
2.19.2. System lay-out (electrical connections, vacuum connections compensation hoses, etc.)
2.19.3. Drawing of the symbol: ................................................................................................................
2.19.4. Adjustment data: ..........................................................................................................................
2.20. Cooling system: (liquid/air)
2.20.1. System description/drawings with regard to the CNG equipment ................................................

ANNEX 5
PRESCRIPTIONS CONCERNING THE FIXATION OF LPG AND CNG CONTAINER(S)
1. The requirements of Regulation No. 67, 01 series of amendments, concerning the fixation of
LPG container(s) or those of Regulation No. 110 concerning the fixation of CNG container(s)
shall be deemed to be met if the container is secured to the motor vehicle by at least:
1.1. Two straps per container,
1.2. Four bolts, and
1.3. Appropriate washers or plates if the body panels at that location are single thickness;
Assuming that the material grade is Fe 370, the fixing bolts shall be of class 8.8, and have the
dimensions specified in Table 1 below:
Table 1
Container content
[litres]
up to 85
85 - 100
100 - 150
more than 150
Minimum dimensions of
the washers or plates
[mm]
round: 30 × 1.5
round: 25 × 2.5
round: 30 × 1.5
round: 25 × 2.5
round: 50 × 2
round: 30 × 3
Minimum dimensions of
the container straps
[mm]
20 × 3
30 × 1.5
30 × 3
20 × 3
50 × 6
50 × 3
Minimum diameter
of bolts
[mm]
8
10
8
12
10
shall meet the provisions of Regulation No. 67, 01 series of amendments,
for LPG containers, or Regulation No. 110 for CNG containers
2. If the container is installed behind a seat, a total clearance of at least 100mm, in the longitudinal
direction of the vehicle, shall be provided. This clearance may be divided between the container
and the rear panel of the vehicle and between the seat and the container.
3. If the container straps also carry the mass of the fuel container, at least three container straps
shall be provided.
4. The container straps shall ensure that the fuel container will not slide, rotate or be dislodged.
5. A protective material such as felt, leather or plastic shall be interposed between the fuel
container and the container straps. However, at the location of the fixation of the washers or
plates to the vehicle body no compressible material should be present.

ANNEX 6A
BI-FUEL VEHICLES WITH PETROL DIRECT INJECTION
ENGINES – CALCULATION OF LPG ENERGY RATIO
1. MEASUREMENT OF THE LPG MASS CONSUMED DURING THE CYCLE
Measurement of the LPG mass consumed during the Type I test cycle shall be done by a fuel
weighing system capable of measuring the weight of the LPG storage container during the test in
accordance with the following:
An accuracy of ±2% of the difference between the readings at the beginning and at the end of the
test or better.
Precautions shall be taken to avoid measurement errors.
Such precautions shall, at least, include the careful installation of the device according to the
instrument manufacturers’ recommendations and to good engineering practice.
Other measurement methods are permitted if an equivalent accuracy can be demonstrated.
2. CALCULATION OF THE LPG ENERGY RATIO
The fuel consumption value shall be calculated from the emissions of hydrocarbons, carbon
monoxide, and carbon dioxide determined from the measurement results assuming that only LPG
is burned during the test.
The LPG ratio of the energy consumed in the cycle is then determined as follows:
G = M × 10,000/(FC × dist × d)
Where:
G : the LPG energy ratio (%);
M : the LPG mass consumed during the cycle (kg);
FC
:
the fuel consumption (l/100km) calculated in accordance with Paragraph 1.4.3. (b) of
Annex 6 to Regulation No. 101. If applicable, the correction factor cf in the equation
used to determine FC
shall be calculated using the H/C ratio of the gaseous fuel;
dist:
distance travelled during the cycle (km);
d: density d = 0.538kg/l

LPG and CNG Retrofit Systems.