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Power supply
Power supply at heat generator
A
L
N
N
L
?
?
N
L
156
Fig. 10
Example: Power supply with plug
Extension (electronics module)
A
Power supply
fÖ
A Power supply for further accessories
fÖ
Plug for heat generator accessories power supply
aBH
Separate power supply
If the power supply for the extension is not made at
the heat generator.
Danger
Incorrect electrical installations can lead to seri-
ous injury from electrical current and result in
appliance damage.
Connect the power supply and implement all
safety measures (e.g. RCD circuit) in accord-
ance with the following regulations:
■
IEC 60364-4-41
■
VDE regulations
Connection conditions of the local grid opera-
■
tor
8
Connect the power cable to the extension.
Route the power cable to the heat generator and con-
nect to plug
contact (output) on the heat generator.
If the power supply is connected to another accessory,
use plug
Heat generator installation and service instruc-
tions
Danger
Incorrect core assignment can result in serious
injury and damage to the appliance.
Never interchange cores "L" and "N".
aBH
If there is no plug
■
Use a separate power supply. See the following
chapter.
Or
Heat generator installation and service instruc-
■
tions
Danger
The absence of system component earthing can
lead to serious injury from electric current if an
electrical fault occurs.
The appliance and pipework must be connected
to the equipotential bonding of the building.
Isolators for non-earthed conductors
The mains isolator (if installed) must simultaneously
■
isolate all non-earthed conductors from the mains
with a minimum contact separation of 3 mm.
■
If no mains isolator is installed, all non-earthed con-
ductors must be isolated from the power supply by
the upstream circuit breaker with a minimum contact
separation of 3 mm.
. Observe the fuse protection of the
aBH
fÖ
A provided.
at the heat generator:
aBH
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