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CB / CB-UL, CBF / CBF-UL (E7) 07/2021 Page 38/197
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 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 (11) DN 6
on the chamber rear, as described in chap. 4.4.4.
Leak test
After connecting the gas cylinder, check all gas connections for leaks (e.g. with leak spray or diluted
soap solution).
The recovery times of the gas concentrations inside the chamber after opening the door are
indicated in the technical data (chap. 24.4) and refer to a connection pressure of 2.0 bar / 29
psi. Decreasing supply pressure will result in longer recovery times.
Conversion table for gas inlet pressures, bar – psi, see chap. 24.8.
4.4.3 Connection of the N
2
gas cylinder (chamber with O
2
control)
Nitrogen (N
2
) in high concentrations is hazardous to health. It is colorless and almost odorless and therefore
practically imperceptible. Any N
2
gas that may escape must be safely led out via good room ventilation or
a suitable connection to an exhaust system.
DANGER
Risk of suffocation through high concentration of N
2
.
Death by suffocation.
∅ Do NOT set up chambers in non-ventilated recesses.
Ensure technical ventilation measures.
Observe the relevant regulations for handling N
2
.
Close the N
2
supply when decommissioning the chamber.
The N
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.
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