Dimplex ZWU 06E Installation And Operating Instructions Manual page 8

Cable routing of SELV signals
If cables are routed in switch boxes or empty conduits, it is essential to
note that the following connections constitute SELV signals (Safety Extra
Low Voltage signals) that must be far enough away from cables carrying
mains power:
• External sensor
• DC control signal
8
Electrical connection
The circuitry stipulated by the local energy supplier (utility company) or
network operator may vary from these connection examples. The
appropriate circuitry is normally listed in the utility company's technical
connection requirements.
The LF (charge release), LX (multi-function) and LZ (additional release)
terminals are to be wired in compliance with the utility company's
requirements via floating contacts, e.g. a ripple control receiver or a tariff
timer.
The central control unit permits connection of:
20 charge controllers maximum
•
Any number of group control units, although the maximum total
•
number of charge controllers or storage heaters in the system is
limited to 20.
Control cables must be laid using two-core wires according to DIN
44573. According to the VDE directive 0100, these two wires may not be
laid in one cable with network wires
Protect the power supply to the heating control independently of the
heating current with a separate circuit breaker.