Cable Lengths; Cross-Sectional Areas; Connections Of Actuators - Siemens LMV27.100x2 Basic Documentation

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Building Technologies

4.1.4 Cable lengths


Mains line AC 230 V

Display, BCI

Load controller X5-03

Safety loop / burner flange (total)

External lockout reset button

Safety valve

Load output ¹)

Fuel valve V1 / V2 / V3

Pilot valve

Ignition transformer

Other lines
¹) Do not run the cable together with other cables. If not observed, hum voltage might
cause electromagnetic interference
Specification as per EN 60730-1
Type of shutdown or interruption of each circuit
Shutdown with microswitch
Mode of operation

4.1.5 Cross-sectional areas

The cross-sectional areas of the mains power lines (L, N, and PE) and, if required, the
safety loop (safety limit thermostat, water shortage, etc.) must be sized for rated
currents according to the selected external primary fuse. The cross-sectional areas of
the other cables must be sized in accordance with the internal unit fuse (max. 6.3 AT).
Min. cross-sectional area
Cable insulation must meet the relevant temperature requirements and environmental
conditions.
Fuses (F1) used inside the LMV27

4.1.6 Connections of actuators

The ready connected actuator cables must not be extended.
Basic Documentation LMV27...
4 Technical Data
Max. 100 m (100 pF/m)
For installation under the burner hood or
in the control panel
Max. 3 m (100 pF/m)
Max. 20 m (100 pF/m)
Max. 20 m (100 pF/m)
Max. 20 m (100 pF/m)
Max. 20 m (100 pF/m)
Max. 10 m (100 pF/m)
Max. 3 m (100 pF/m)
Max. 3 m (100 pF/m)
Max. 3 m (100 pF/m)
Max. 3 m (100 pF/m)
1-pole
Type 2 B
0.75 mm²
(single- or multi-core as per VDE 0100)
6.3 AT DIN EN 60127 2 / 5
CC1P7541en
17.12.2018