Standard Instrument Panel; Panel; Panel Front View; Diagram Of The Terminal Block Electrical Connections - Ferroli PREXTHERM RS3 Mode D'emploi

6. STANDARD INSTRUMENT PANEL

6.1 Pannel (Fig. 13)
The instrument panel supplied, made from pla-
stic with index of protection IP40, holds the con-
trol and safety instruments.
The boiler electrical system must be:
- designed and made by qualified personnel
and connected to an earth system in
compliance with the legalisation in force.
- suitable for the maximum power input of the
boiler, using cables with an adequate cross-section.
The earth wire in the power cables and connec-
tion cables to the burner must be a few mm lon-
ger than the other wires in the same cable. For
the connections between the burner, the electri-
cal panel and the power supply, use H07 RN-F
cables for installation in view. For other types of
installation or special environmental conditions,
refer to the legislation in force. The composition
and the diameter of the wires should be calcula-
ted based on the power input of the burner. To
access the instruments, rotate the front panel
(A). To access the terminal block and unwind
the capillary tubes from the thermostats and the
L
N Control panel power supply
e
3
Burner power supply
4
5
1 st stage thermostat
6
7
2 nd stage thermostat
8
9 Lockout light
10 2 nd stage operation light
11
System pump power supply
12
13 Boiler remote on
(if present, otherwise jumper)
14
mpianto
15 Boiler remote safety alarm
(if present, otherwise jumper)
16
ota
17
Room thermostat
are)
18
ta
are)
18 17 16
thermometer, remove the top panel (B), after
having unscrewed the 2 side screws (C). The
control thermostats (12-13 - Fig. 16) can be set
by the user, using the knob at the front. The
safety thermostat has a fixed setting and
manual reset, as specified by Italian Min.
Decree 1/12/75, collection R.
The following are compulsory:
- the use of a two-pole thermal-magnetic over-
load switch, mains disconnecting switch, com-
pliant with the CEI-EN standards (minimum
contact opening 3 mm)
- observe the polarity L1 (Phase) - N (Neutral)
- use cables with a minimum cross-section of
1.5 mm, complete with pointed end terminals.
- refer to the wiring diagrams in this booklet for
any operations on the electrical system.
- connect the appliance to an effective earth
system.
- the water pipes must not be used to earth the
appliance.
The manufacturer is not liable for any damage
due to the failure to earth the appliance and to
observe the information provided on the wiring
diagrams.
15 14 13 12 11 10
B4 S3 T2 T1 N
9 8 7 6 5
- 19 -
A connection point is provided on the front head
for earthing the boiler body.

6.2 Panel front view

(Fig. 14)
Key
1 Pump ON switch
2 Burner ON switch
3 Boiler ON switch
4 Test button
5 Safety pressure switch reset button
6 Boiler water temperature
7 Boiler on LED
8 1 st burner flame LED
9 2 nd burner flame LED
10 Burner shutdown LED
11 Safety pressure switch LED
12 2 nd boiler flame control thermostat TR1
13 1 st boiler flame control thermostat TR1
14 Space for temperature controller
6.3 Diagram of the terminal block electrical
connections
L1 T8 T7 T6
4 3 N
GB
B5
L