D - EIMWC01008-06_02EU - 10/182
8. INSTALLATION
8.1. Information about installation of
systems with R134a and R513A
Before machine installation and commissioning, the people
involved in this activity must have acquired the information
necessary to carry out these tasks, applying all the
information collected in this book
all the procedures reported
in the aforementioned norms and the provided requirements by
the local law.
Do not allow unauthorized and/or unskilled personnel to
access the unit.
8.2. Additional guidelines for safe use of
R134a and R513A
According to the standard EN 378-1-2016, any refrigerant
system that contains R134a or R513A, can be installed without
any restriction in open air or machinery rooms. Anyway, the
building owner or the end user shall ensure that that access is
permitted only by qualified and trained personnel, who is aware
of the general safety precautions of the building.
It is recommended to satisfy all the requirements listed in the
EN 378-3-2016 for the installation.
The refrigerant shall not be able to flow into any adjacent room,
doorway, or exhaust system in the event of a leak.
It is advised to install a refrigerant detection system which
works also during the normal operation of the refrigerant
system: in case of refrigerant leak indeed, it can activate the
alarm and all the necessary emergency procedures until the
machine shutoff.
The alarm shall also advice the authorized personnel to take
the necessary steps. The refrigerant leak detector shall be
supplied by the user because it is a key component of the
sprinkler system of the entire building.
8.3. Physical characteristics of
refrigerant R1234ze (E)
This product can be equipped with refrigerant R1234ze(E)
which has minimal impact to the environment, thanks to its low
value of Global Warming Potential (GWP).
Refrigerant type
R1234ze
Safety Class
A2L
PED Fluid Group
2
Practical limit (kg/m
3
)
0.061
ATEL/ ODL (kg/m
3
)
0.28
LFL (kg/m
3
)@ 60°C
0.303
Vapour density @25°C, 101.3 kPa (kg/m
3
)
4.66
Molecular Mass
114.0
Normal Boling Point (°C)
-19
GWP (100 yr ITH)
7
GWP (ARS 100 yr ITH)
<1
Auto Ignition Temperature (°C)
368
8.4. Information about installation of
systems with R1234ze
The chillers are built in accordance with the main European
Directives (Machinery Directive, Low Voltage Directive,
Electromagnetic Compatibility Directive, Pressurized Equipment
Directive), make sure you also receive the declaration of
product conformity with the directives along with the
documentation.
Before machine installation and commissioning, the people
involved in this activity must have acquired the information
necessary to carry out these tasks, applying all the
information collected in this book. Do not allow
unauthorized and/or unskilled personnel to access the unit.
The chiller has to be installed in open air or machinery room
(location classification III).
To ensure location classification III a mechanical vent on the
secondary circuit(s) has to be installed.
Local building codes and safety standards shall be followed; in
absence of local codes and standards refer to EN 378-3:2016
as a guide. In paragraph “Additional guidelines for safe use of
R1234ze(E)” there are provided additional information that
should be added to the requirements of safety standards and
building codes.
8.5. Additional guidelines for safe use of
R1234ze(E) for equipment located in
the open air
Refrigerating systems sited in the open air shall be positioned
to avoid leaked refrigerant flowing into a building or otherwise
endangering people and property.
The refrigerant shall not be able to flow into any ventilation
fresh air opening, doorway, trap door or similar opening in the
event of a leak. Where a shelter is provided for refrigerating
equipment sited in the open air it shall have natural or forced
ventilation.
For refrigeration systems installed outside in a location where a
release of refrigerant can stagnate e.g., below ground, then the
installation shall comply with the requirements for gas detection
and ventilation of machinery rooms.
8.6. Additional guidelines for safe use of
R1234ze(E) for equipment located in
a machinery room
When a machinery room is chosen for the location of the
refrigerating equipment it shall be located in accordance with
local and national regulations. The following requirements
(according to EN 378-3:2016) can be used for the assessment.
•
A risk analysis based on the safety concept for the
refrigerating system (as determined by the manufacturer
and including the charge and safety classification of the
refrigerant used) shall be conducted to determine whether
it is necessary to place the refrigerating system in a
separate refrigeration machinery room.
•
Machinery rooms should not be used as occupied
spaces. The building owner or user shall ensure that
access is permitted only by qualified and trained
personnel doing the necessary maintenance to the
machinery room or general plant.
•
Machinery rooms shall not be used for storage with the
exception of tools, spare parts and compressor oil for the
installed equipment. Any refrigerants, or flammable or
toxic materials shall be stored as required by national
regulations.
•
Open (naked) flames shall not be permitted in machinery
rooms, except for welding, brazing or similar activity and
then only provided the refrigerant concentration is
monitored and adequate ventilation is ensured. Such
open flames shall not be left unattended.
•
A remote switching (emergency type) for stopping the
refrigerating system shall be provided outside the room
(near the door). A similar acting switch shall be located at
a suitable location inside the room.
•
All piping and ducting passing through floors, ceiling and
walls of machinery room shall be sealed.
•
Hot surfaces shall not exceed a temperature of 80 % of
the auto-ignition temperature (in °C) or 100 K less than
the auto-ignition temperature of the refrigerant, whichever
is higher.
Refrigerant
Auto ignition
temperature
Maximum surface
temperature
R1234ze
368 °C
294 °C
