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CB / CB-UL, CBF / CBF-UL (E7) 07/2021 Page 39/197
The following steps are required:
Ensuring the correct N
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 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 (9) 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.
4.4.4 Connecting the gas hose to the chamber rear (for CO
2
, O
2
, N
2
)
The procedure of connecting the gas hose to the chamber rear is the same for any gas connection. All
quick acting closure sockets (CO
2
, N
2
with O
2
control, and O
2
with O
2
control and optional alternative control
range 10 up to 95 vol.-% O
2
) are degreased and supplied with a FKM gasket.
Note for chambers with O
2
control: The quick acting closure socket and the hose nozzle for the O
2
connection must be degreased.
DANGER
Fire and explosion hazard through contact of fat with O
2
.
Serious injury or death from burns and / or explosion pressure.
∅ All connection parts for the O
2
connection must be degreased.
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