27
Värmebaronen EP 350
In
s
ta
llat
io
n
Electrical installation
Safety equipment
To ensure that the boiler's safety system works
as intended, external safety equipment must be
connected as shown below.
If the boiler was supplied without pressure guards, the instal-
lation must be supplemented with pressure guards. Connec-
tion as shown in the figure.
1 2 3 4 5 6 7
L
L
10
N
N N N
X01
P
1
2
3
Pz+
P
1
2
3
Pz+
1
2
3
Pz-
P
1
2
Pz- low pressure guard
Pz+ high pressure guard
Alternatively, if the boiler can share the safety equipment
with other boilers in the installation.
1
2
3
4
5
6
7
L L
10
N
N
N
N
X01
230V~
1
The alarm signal, 230 V~, from existing safety equipment, is
connected to terminal 1.
Please note that the alarm signal must be of the same phase
as that used for the boiler’s control.
Load guard
See ‘CURRENT LIMIT’ and ‘MARGIN’ in the installation menu!
The guard is not phase-sensitive and the current
transformers do not need to be connected if the function is
not to be used.
Measurement is with primary and secondary current
transformers. The latter are supplied with the boiler.
The system-adapted primary current transformers, xxx/5 A,
are supplied by the electrician.
The cable from the primary current transformer must pass
through the secondary current transformer once.
1
2
3
4
L1
L2
L3
Main fuses
Secondary current transformers
Primary current transformers
32
The secondary current transformers must be con-
nected to the circuit board before the lead from the
primary current transformer is routed through them!
Restart after power failure
The boiler requires manual restart after a power failure.
Disengagement of the function must be evaluat-
ed together with the end user and accepted by
the accredited body that makes periodic moni-
toring of the boiler.
Changeover
Move cable marked ”22”:
From START button,
5
, terminal ”13”.
To STOP button,
6
, terminal ”14”.
before changeover:
8
S1
START
STOP
14 13
S2
14 13
14
2
8
S1
START
STOP
14 13
S2
14 13
14
2
22
22
6
5
after changeover:
8
S1
START
STOP
14 13
S2
14 13
14
2
8
S1
START
STOP
14 13
S2
14 13
14
2
22
22
6
5
All other cables should remain in their positions!
The boiler will start automatically when the voltage returns
after a power failure.
Check after electrical installation that no tools
or similar have been left behind the busbar
system.
Check the insulation between phases and be-
tween phases and earth.
