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VÄRMEBARONEN EP 31 300
Pressure guards - Safety equipment
To ensure that the boiler's safety system works
as intended, external safety equipment must be
connected as shown below.
Any supplied pressure guards, option, are connected according
to the figures below.
Low pressure guard
Existing connection between terminals 4 and 5 is removed.
1 2 3 4 5 6 7 8 9 10
N
N
N
N
X01
Pz-
2
1
3
P
1
High pressure guard
Existing connection between terminals 3 and 4 is removed.
1 2 3 4 5 6 7 8 9 10
N
N
N
N
X01
Pz+
2
1
3
P
7 3 2
1
Low and high pressure guards
Existing connections between terminals 3-4-5 are removed.
Pz-
2
1
3
P
1 2 3 4 5 6 7 8 9 10
N
N
N
N
X01
Pz+
2
1
3
P
1
Alternatively, if the boiler can share the safety equipment
with other boilers in the installation.
1 2 3 4 5 6 7 8 9 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
The current transformers need not be connected if the function
is not to be used. The guard is not phase-sensitive.
Secondary measurement
See 'CURRENT LIMIT' and 'MARGIN' in the Installation
menu!
Measurement is with primary and secondary current trans-
formers. 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.
Connection to terminal block J10, with a common conductor
in terminal J10:4.
1
2
3
4
L1
L2
L3
34
Main fuses
Secondary current transformers
Primary current transformers
Direct measurement
See ”MAIN FUSE” in the Installation menu!
Measurement, to a maximum of 200 (A), is carried out using
the supplied transformers.
Connection to terminal block J10, with a common conductor
in terminal J10:4.
1
2
3
4
L1
L2
L3
34
Main fuses
Current transformers
Electrical installation
