50
9. Electrical connection
9.1 Connection 12 V DC
•
switch (Fig. 22, item 1), or a separate switch (the boiler uses approx. 70 mA when in sleep mode,
• A 5 A fuse (Fig. 22, item 2) must be installed closest to the battery. The positive and negative cables
between battery and boiler must have a cross-sectional area of 1.5 mm
2
, for lengths up to 20 metres
(10 m for the positive cable and 10 m for the negative). For longer cables, the cross-sectional area
must be 2.5 mm
2
.
• If used instead of a the battery, a transformer must be of high quality and provide constant direct
current, not pulsing.
• Item 3 (Fig.22) is the connection to the boiler, or if the option card is installed, (Fig. 21, item 1,
page 49). The option card is always pre-installed on the 3030 Plus.
9.2 230-240 V AC connection
• one 10 A fuse for a 2 kW immersion heater,
• one 16 A fuse for a 3 kW immersion heater.
• 230 VAC must be carefully separated from 12 V.
Provide a means to disconnect the power supply to the boiler, either by an easily accessible plug or an
all-pole switch.
To avoid malfunction, use only original Alde cables.
Never fasten 12 V or sensor cables with 230 V cables. Keep cables apart.
If cables are bundled together, the risk of malfunction during use increases.
There must be no voltage spikes or voltage loss in the 12 V feed to the boiler.
Electrical accident
The boiler must be earthed.
1. Switch
2. Main fuse, 5 A
3. Terminal block for 12 V in
4. Battery 12 V
Fig. 22, Electric connections, boiler
WARNING
3
12V DC
+
-
1
2
4
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