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CB / CB-UL, CBF / CBF-UL (E7) 07/2021 Page 36/197
After connecting the gas cylinder, check all gas connections for leaks (e.g. with leak spray or
diluted soap solution).
4.4.1 Connection of the CO
2
gas cylinder
Carbon dioxide (CO
2
) in high concentrations is hazardous to health. It is colorless and almost odorless and
therefore practically imperceptible. Vent out any CO
2
gas that may escape via good room ventilation or a
suitable connection to an exhaust system. We recommend installing a CO
2
warning system.
DANGER
Danger of suffocation and poisoning by high concentration of CO
2
(> 4 Vol.-%).
Death by suffocation.
∅ Do NOT set up chambers in non-ventilated recesses.
Ensure technical ventilation measures.
Observe the relevant regulations for handling CO
2
.
Close the CO
2
supply when decommissioning the chamber.
The CO
2
gas necessary for operation must have a technical grade of 99.5 %.
The gas connections must be established by qualified personnel who are trained in handling
the respective gases and familiar with the required safety measures.
The following steps are required:
Ensuring the correct CO
2
output pressure
A gas supply pressure above 2.5 bar / 36 psi will result in chamber damage.
Use a pressure reducer and make sure to avoid any excessive outlet pressure when connecting the gas
hose to the chamber.
The real outlet pressure of gas cylinders, sets of gas cylinders or central gas supplies am on the second
manometer must not exceed 2.5 bar / 36 psi.
NOTICE
Danger of damage by excessive outlet pressure > 2.5 bar / 36 psi.
Damage to the chamber.
∅ The outlet pressure must NOT exceed the indicated value of 2.5 bar / 36 psi.
Before connecting, check the outlet pressure on the pressure reducer of the cylinder.
Adjust the outlet pressure to 2.0 bar / 29 psi above the ambient pressure.
Observe the correct outlet pressure also when replacing the gas cylinders.
Establishing the connection to the chamber
Connect the supplied gas hose (internal diameter 6 mm / 0.24 inches) to the pressure reducer of the
gas cylinders or central gas supply and secure the connection with the supplied hose clamp.
Connect the pre-assembled hose nozzle of the gas hose to the quick acting closure socket (10) DN 6
on the chamber rear, as described in chap. 4.4.4.
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