KAESER KOMPRESSOREN M250, Руководство оператора, Страница: 63 / 426

General design
Fig. 13 General design of the SCR system
1
Diesel fuel tank
2
Dosing unit for the reduction agent
3
Diesel engine
4
Nozzle, reduction agent
5
Exhaust pipe
6
SCR silencer with catalytic converter mod‐
ule
7
Electronic control unit
8
Tank, reduction agent
9
Air container, exhaust treatment
Reduction agent:
The reduction agent with the trade name "DEF" (Diesel Exhaust Fluid) is used which is also known
as "Urea" or, in Europe, as "AdBlue
® ". This additive – a non-toxic and odour-free urea solution – is
easily filled at the petrol pump and carried in a separate tank.
DEF meets the quality standard EN 70070/ISO 22241 and is neither a hazardous material as de‐
fined by the Chemicals Control Law nor a hazardous good as defined by the Dangerous Goods
Regulation. It must not be mixed with any additives or diluted with water, or contaminated with oth‐
er substances.
Further information Instructions regarding the safe handling of the DEF reduction agent are provided in chapter 3.5.2.
4.7.2.2 Monitoring the addition of the reduction agent
A well-functioning exhaust air treatment is necessary in order to meet the stricter emission limits.
For this reason, the SRC system is monitored by various sensors, including the filling level of the
reduction agent tank.
If this tank is found empty, the engine control switches the engine to "torque reduction". The
SIGMA CONTROL MOBIL displays the warning message "Torque reduction active" (message
code 3182).
In "torque reduction" mode, the engine reduces its output to force the operator to replenish the re‐
duction agent and/or to have the exhaust system to be inspected.
This means that the engine runs in IDLE speed and no longer generates compressed air. The ma‐
chine is no longer operational.
The engine will operate with normal speeds only after the reduction agent has been replenished.
4 Design and Function
4.7 Options
No.: 9_9570 07 USE
Operator Manual Screw Compressor
M250 SIGMA CONTROL MOBIL
49