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3.3
ELECTRICAL CONNECTION
Electrical systems of thermal plants designed only for heating purposes must comply with numerous le-
gal regulations which apply to in general as well as specifically to each application or fuel type.
3.4
RCB 3S/RCB 3S M OPTIONAL CONTROL PANEL (Fig. 3)
The control panel (optional) with the boilers is made of self-extinguishing plastic and houses the regulation
and safety instruments:
KEY
1 PANEL LIVE
2 BURNER SWITCH N. 1
4 HEATING PUMP SWITCH
7 BOILER THERMOMETER
8 CONTROL THERMOSTAT N. 1
9 SAFETY LIMIT THERMOSTAT N. 1
11 CONTROL THERMOSTAT N. 2
The upper part of the control panel can be rotated to gain access to the terminal board and uncoil the ther-
mostat and thermometer capillaries. A copy of the wiring diagram is contained inside the control panel cover.
The regulation thermostats (TR1-TR2) have an operating range from 60° to 100° and can be set by the
user by means of the front knob.
Safety thermostats (TS) has a fixed setting of 110°C and can be manually reset in accordance with Ministe-
rial Decree 1/12/75 «R».
Circulator consent thermostat (TM) has a fixed setting of 50°C with a working range of 6°C: at start-up,
with the heating system cold, this permits higher boiler temperatures to be maintained thus reducing the risk
of flue gas condensation.
For correct installation, refer to the boiler casing assembly instructions.
3.5
RCB 3S 4000÷6000 CONTROL PANEL
The generators are equipped with electric board (IP 55 protection level), which are already assembled to the
different boiler accessories.
WIRING DIAGRAM
Refer to the diagram supplied with the specific switchboard.
ENGLISH
Fig. 3
46
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