Tecumseh AJ2 Série Notice D'installation page 16

It is essential that you read this document in full.
The implementation, operation, maintenance, and end-of-life management of the products involves the observance of and
adherence to strict rules and regulations in line with existing standards, norms, and best practice. Compliance with the applicable
standards and norms in force and the legislation of the country in which the compressor is installed is essential, as is the application
of the specific rules governing refrigerated and electrical connections.
These instructions cover the main points of the ISO standards. The EN directives and standards described below prevail within the
European Union.
1. Declarations of conformity and incorporation
These refrigerant compressors have been designed for incorporation within machines in accordance with the Machine Directive
2006/42/EC. They comply with the Low Voltage Directive (LVD) 2006/95/EC and the Pressure Equipment Directive (PED) 97/23/EC.
They may only be put into service if installation has been carried out in accordance with the instructions below and if the machines
comply with the regulations in force.
In the event of the use of fluids classified as A2L, A2, or A3 according to ISO 817, the safety rules and regulations specific to the
inflammable fluids must be respected. The compressors will be installed and maintained in accordance with safety standards ISO
5149 or EN 378, EN60335-2.
The designations of the compressors in question are C/TAJ****U for R290, AJ****N when they are running on R1234yf and AJ****P
when they are running on R455A and R454C
2. Safety and risks associated with the implementation and use of inflammable refrigerant fluids, classified in categories A2L, A2, or A3
2.1. Inflammable refrigerant fluids R290 and R1234yf
"R290 is a propane of very high purity (>99.5%).
R1234yf is a pure hydrofluoroolefin (HFO) fluid.
R455A is a non-azeotropic mixture of hydrofluoroolefin (HFO), hydrofluorocarbon (HFC) and natural fluid composed of R1234yf
(75.5%), R32 (21.5%) and R744 (3%)
R454C is a non-azeotropic mixture of hydrofluoroolefin (HFO) and hydrofluorocarbon (HFC) composed of R1234yf (78.5%) and R32
(21.5%)
R290, R1234yf, R455A and R454C fluids are heavier than air; they will naturally migrate towards the bottom of the installation in the
absence of ventilation"
Their primary characteristics are:
Refrigerant
Safety class
Lower flammability limit
under normal conditions in
volume/volume according to
ISO 817
Lower flammability limit
under normal conditions
Practical limit
Auto-ignition temperature
(according to ISO 817)
R290 R1234yf
A3
2.1%
0.038K/m3
0.289Kg/m3
3
7.6 g/m
57.8 g/m
470°C
16
455A
A2L
A2L
11.8
6.2%
0,431Kg/m3
86 g/m3
3
(473°C supplier data) (>400°C supplier data)
405°C
R454C
A2L
6.2%
0.293 Kg/m3
59 g/m3