GESTRA NRS 1-40, Оригинальное руководство по установке

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Emergency Operation
If one level electrode fails to operate the system can continue to operate in emergency mode under
constant supervision according to TRD 401 with
one
level electrode:
1. Undo screws ! and detach lower terminal strip 0 , Fig. 3
2. Set code switch
8
“S1” and “S2” to OFF, Fig. 5, Fig. 14
3. Set code switch
9
“S1” to ON, “S2” to “S7” to OFF.
The switching controller NRS 140 features now the node ID “1”.
Fig. 15
4. Set node ID of the working level electrode to “2”, cf. section “Emergency Operation” in the
Operating Instructions for the NRG 1640, 1710, 1940, 11140.
5. Reattach lower terminal strip
0
.
n
Enter beginning of emergency operation in the boiler log.
n
An installation operating in emergency mode has to be constantly supervised.
n
Put up a sign indicating the emergency operation of the switchgear unit.
n
Immediately replace faulty level electrode.
n
Enter end of emergency operation in the boiler log.
Attention
Emergency operation of waterlevel limiting system
Danger
The terminal strip of the NRS 140 is live during operation.
This presents the danger of electric shock.
Cut off power supply before mounting or removing the terminal strips or the housing
cover.