Binder 9020-0402, Translation Of The Original Operating Manual

Page: 50 / 173

MK LIT (E5) 01/2021 page 50/172
Figure 17: Connection for inert gas at the bottom of the safety module
O
2
reduction
The inert gas connection allows the operator to reduce the oxygen content in order to stay below the LEL.
The settings for inertization are the responsibility of the operator.
Gas connection for N
2
permanent inertization (O
2
suppression)
O
2
sensor system switching thresholds, default setting:
Notification level 1: 25 Vol.-%
Notification level 2: 30 Vol.-%
These switching thresholds can be set according to customer specifications, e.g., to release a higher-level
control system.
Max. connection pressure N
2
: 10 bar.
4 5
1: Pressure controller with manometer, outlet pressure max.
2 bar
2: 2/2-way solenoid valve
3: Flow meter 100 - 1000 l/h
4: Gas inlet coupling connector (NW%), inlet pressure max.
10 bar
5: Gas outlet coupling socket (NW5)
The interior of the battery test chamber is permanently inertized via a flush air connection for nitrogen N
2
.
This uses the oxygen concentration and the flush air connection installed in the safety module. The nitrogen
provided by the operator may be supplied to the flush air inlet at a maximum pressure of 10 bar. A pressure
reducer is provided in the safety module to reduce this admission pressure to 1.2 bar. The flush air volu-
metric flow is indicated by a flow meter. The 2/2-way solenoid valve is actuated by the operator according
to the desired O
2
concentration.