Power Supply; Power Supply At Heat Generator; Separate Power Supply - Viessmann EM-S1 Installation And Service Instructions For Contractors

Power supply

Power supply at heat generator

A
L N N L
? ?
N L
156
Fig. 5
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
Create the power supply connection.
Route the power cable to the heat generator and con-
nect to plug
at the heat generator.
If power is supplied to a further accessory, use plug
A provided
fÖ
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.
Installation sequence
. Observe fuse protection of the output
aBH
at the heat generator:
aBH
11