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Installation (for engineers only)
Logamatic SC40 - Technical specifications are subject to change without prior notice.
14
4
4.4.2 Connecting the leads
Observe the following when connecting the cables:
Comply with local regulations, such as protective earthing tests etc.
Only use pumps, valves and sensors supplied by Buderus.
Protect the controller from overloads and short-circuits.
The power supply must match the specifications on the rating plate. See also Table 1, page 6.
Connect only 1 lead to each terminal (max. 1.5 mm
2
).
The temperature sensor leads can be connected either way round. The sensor leads can be up
to 100 metres long (up to 50 m length = 0.75 mm
2
, up to 100 m = 1.5 mm
2
).
Route all sensor leads separately from cables carrying 230 V or 400 V to avoid inductive inter-
ference (minimum separation 100 mm).
Use shielded low-voltage cables if external inductive interference is expected (e.g. from power
substations, high-voltage power cables, microwaves).
For the 230 V connection, use a cable of at least type H05 VV- ... (NYM...).
Ensure that structural fire safety features are not impaired.
The leads from the motorised diverter valves shown in the configuration diagrams must be con-
nected as follows: brown = R, blue = N, yellow and green = Earth.
Only connect pumps to the outputs R1 and R2 (speed control on these connections only).
Motorised valves with OPEN/CLOSE command (or mixer units) must also be connected to ter-
minals to .
The connections L3 to L5 are for the power supply for special functions of connected compo-
nents.
V Connect the leads according to the desired configuration diagram (Æ pages 15 - 41).
V After completing the work, close the controller by replacing the cover and tightening the securing
screw.
The use of some functions (double match flow, cooling, daily heating and heat ex-
changer anti-icing) requires additional components (valves, temperature sensors) that
must be purchased separately (Æ Table 13, page 53).
Warning: risk of damage to system due to pump failure.
V If a pump with internal electronic control circuitry is to be connected, deactivate the
speed modulation function (Æ Section 7.5.2, page 56).
R3
R5
14


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Others manual(s) of Buderus Logamatic SC40

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Buderus Logamatic SC40 Installation Guide - Dutch - 76 pages


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