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6 .2 .7 Connection to 0-10v external
thermoregulator
An external thermoregulator connection using a 0 – 10 v
signal could be used by connecting the output signal to
terminals n.13 and 14 (Figure 15).
b
The positive pole of the signal output must be
connected to terminal 13 for the device to work
correctly.
6 .2 .8 Connection to alarm device
A beeping or visual alarm device, to signal any technical
faults, may be connected outside by a special output with
clean contact on the boiler terminal board.
The alarm device must be connected to terminals n.18 and
19 (Figure 15).
6 .3 Emergency mode
The Power Plus Box 1001 electronic control system includes
a functional mode called "Emergency", which can be
activated in case of a Master board malfunction.
The master board can in fact be excluded so as to enable
the system to work with a flow temperature preset in default
by the manufacturer, guaranteeing the heating unit with
continual service.
b
Qualified personnel only may work on the electrical
system and in compliance to provisions of the law,
with particular attention to rules on safety.
The following procedure must be adopted to enable the
"Emergency" function:
- Disconnect the 4-pole J14 connector from the master
board (see Figure 16);
- Set all four J17 switches on the heating unit slave
board to OFF (Figure 17);
- Supply power to all the circulators in the system
directly from the mains using the specific relays/
change-over switches;
- Connect terminal X1 or terminal X2 (which are part
of the J14 connector wiring disconnected during the
first step of this procedure) to a 24 V ac power supply
(see Figure 18).
Figure 16
17
Figure 17
Figure 18
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