envea STACK 602, User Manual

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STACK 602 9 Maintenance
ENVEA UK Ltd
(PC-000848-MA Issue 5, December 2021)
vii
Figure 6: Purge blower wiring.
4.4.3 Adjusting the Speed
The small purge blower unit has three speed settings: HIGH, MEDIUM, and LOW.
The typical amount of purge air required for
DynamicOpacity
®
sensors is between
30 and 60 l/min under normal stack conditions (typically ±10 mbarg) to both the
Transmitter and Receiver.
This can be achieved by setting the switch selection to HIGH (
Figure 7
). The
required speed is pre-set ex-works .
Figure 7: Speed selection for DynamicOpacity
®
sensors.