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Idiomas disponibles
ELECTRICAL CONNECTION
Electrical systems of thermal plants designed only for heating purposes must comply with numerous legal regulations
which apply to in general as well as specifically to each application or fuel type.
CONTROL PANEL
OPERATIONS
Use main switch (11) to power up the panel and all the connected devices.
Switches (12) and (13) in turn, power off the plant burner and pump.
Thermostat (21) is used to regulate boiler working pressure.
Min pressure thermostat stops the plant pump during start up and until the boiler temperature has reached 50°C.
In case of three-phase burners and/or pump or if electrical input exceeds 3A, remote contactors should be provided
between the boiler control panel and the load.
The electric line supplying the boiler control panel should be provided with a protection fuse-switch.
WARNING
•
For the electric connection of boilers exceeding 300.000 kcal/h rated power, the technician should make ready an addi-
tional (2nd) safety thermostat.
Legend:
A - Operating burner light
B - Counter (optional)
22 - Safety
30 - Termometer
WIRING DIAGRAM FOR BURNER AND SINGLE-PHASE PUMP
Key
IG
Main switch
TS
Safety thermostat 110°C
TM
Min thermostat 45°C
TA
Room thermostat
IB
Burner switch
SB
Unit warning light
SL
Line warning light
Ch
Burner timer
PI
Plant pump
IPi
Plant pump switch
TR1-TR2 2 stages thermostat 1°- 2° flame
(30°-90°C ∆t 1°- 2° flame = 7°C)
F4/K4
Connection
Thermo regolation RVP
L
Terminal board
N
3-20
21
30
22
- 21
-
INSTALLATION
13
11
A
12
B
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