Binder UF V - Operating the CO Emergency Cooling System

UF V (E3) 03/2019 Page 81/116
• Make sure that operating instructions on the connection and exchange of the pressurized gas cylinder s
are attached in the vicinity of the pressurized gas cylinders. The instructions shall contain all required
safety-related information in an intelligible form.
• Laboratories in which compressed gas cylinders are installed must be labeled
with the warning sign W019 “Warning of gas cylinders”.
• In areas with increased risk of fire, if possible set up gas cylinders outside the rooms and install fix
tubing.
Carbon dioxide (CO
2
) in high concentrations (> 4 Vol.-%) is hazardous to health. It is colorless and almost
odorless and therefore practically imperceptible. Escaping CO
2
gas is heavier than air and accumulates at
the ground or possibly in lower-lying parts of the building. There is danger of suffocation and poisoning.
Hazards due to uncontrolled gas release must be effectively avoided.
WARNING
High concentration of CO
2
(> 4 vol.-%).
Risk of death by suffocation.
Danger of poisoning.
 Operate the CO
2
emergency cooling only in a well-ventilated room.
 Ensure technical ventilation measures. Install a suitable conduct at the CO
2
discharge
outlet of the emergency cooling system.
 Observe the relevant regulations for handling CO
2
.
When installing pressurized CO
2
cylinders take into account the structure of the building.
• The installation site must be in a well ventilated area (natural ventilation). For rooms with a with a
floor area of ≤ 12 m
2
with solid walls without openings on all sides there are further regulations (max.
two 14 liter CO
2
cylinders, Label “suffocation” and prohibition to close the door after entering).
• The installation site must be technically ventilated (technical ventilation) with a CO
2
alarm system
(gas warning device)
We strongly recommend continuous monitoring of the CO
2
concentration in the ambient air of the CO
2
emergency cooling. It must be permanently ensured that the occupational exposure limit OEL (formerly
maximum permitted workplace concentration) of 0.5 Vol.-% CO
2
is not exceeded.
21.2 Operating the CO
2
emergency cooling system
When operating the CO
2
emergency cooling system, the freezer’s interior is flooded with CO
2
. CO
2
in high
concentrations (> 4 vol.-%) is hazardous to health. It is colorless and almost odorless and therefore prac-
tically imperceptible. Operate the CO
2
emergency cooling system only in a well-ventilated room. Released
CO
2
gas muss must be safely led out via good room ventilation or a suitable connection to an exhaust
system and through a conduct at the CO
2
discharge outlet (14) on the rear of the emergency cooling sys-
tem. Observe the occupational exposure limit for CO
2
set by the national authorities. We recommend in-
stalling a CO
2
warning system.
Even when CO
2
or systems operated with CO
2
are handled carefully and appropriately, a residual risk
remains, which can lead to life-threatening situations under certain circumstances. Therefore we strongly
recommend continuous monitoring of CO
2
concentration in the ambient air of CO
2
emergency cooling. It
must be ensured permanently that the maximum permissible occupational exposure limit for CO
2
(0.5 vol -
% CO
2
for Germany) is not exceeded.“
DOMINIQUE DUTSCHER SAS