Internal Wiring - Hitachi DHWT Serie Manuel D'installation Et De Fonctionnement

14 1 Cathodic protection

13.5 INTERNAL WIRING

Internal Wiring Connection
14 CATHODIC PROTECTION
In order to protect the inside of the vessel from corrosion all the
enamelled DHWT can be equipped whit a cathodic protection
unit, comprising magnesium sacrifice anodes, charge gauges
and wiring of connection.
It basically comprises a magnesium anode (1) mounted on the
storage tank's connection plate (2), connected to the external
anode load measured (3) which allow to know the anode con-
sumption rate without having to dismantle it.
The electrical connection of the load measured (3) to the anode
(1), is made through the wiring of connection (6):
- To the anode: U shaped terminal M10 (4)
- To the load measured: female Faston terminal 2.8 (10)
2
19 PMML0198A-rev.1 - 04/2011
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The electrical connection of the load measured (3) to the earth, is
made through the wiring of connection (7):
• Check the magnesium anode load periodically by pus-
• Do not install the permanent cathode protection and the
+
9
-
10
Anode-Control
3
OK
Test
Power cable
Control EH cable
Sensor DHWT cable
Detail D
To earth: U shaped terminal M10 (5)
-
- To the load measured: female Faston terminal 6.3 (10)
C A U T I O N
hing the button. If the gauge is in the red zone, the mag-
nesium anode must be replaced.
cathodic protection together.
1-4
2
3
7
6
8
5