20
STV50 ed 09/08
VICTRIX 50 Rev. 002
This interrupts power to the transformer (230V/24V) of the low-voltage
circuit when the power input is over 4 A.
It is mounted on the integrated board.
Transformer fuse
230V / 24V
(F3)
4 AT 250 V fuse
Loads.
Depending on the position:
0:
- circuit not powered.
ON:
- circuit powered.
Main switch
(S1)
2-position switch
positions
Permits water circulation in the primary circuit.
It is energised by the integrated board following a central heating or antifreeze request or a domestic
hot water request
(if the 3-way diverter valve kit is installed for an external storage tank)
.
Circulator
(M1)
It is powered when the main switch is ON
(see integrated board operation).
Integrated board
This is a 230V/24V transformer that powers the low-voltage adjustment circuit.
It is located on the back of the boiler at the bottom right.
Low voltage transformer
(T10)
Low voltage circuit.
Safety devices and controls.
Each time a request is made it detects the pressure inside the boiler circuit.
If pressure is below 0.3 bar it turns the burner off.
System pressure switch
(S5)
Interrupted contact
When open
(N.O. contact)
it enables operation in the central heating mode.
It enables operation in the domestic hot water mode when the contacts
are closed.
Summer switch
(S16)
(not provided to Immergas)
Two-contact switch
This detects ignition of the burner by whose flame it is covered.
It is connected to the integrated board detection circuit.
Detection electrode
(E2)
It is controlled by the integrated board ignition circuit that produces an electric discharge between
its end and the (
blind
) earthed electrode.
Upon contact the air-gas mix ignites.
Ignition electrode
(E1)
With the main switch S1 ON
(closed)
, if boiler temperature drops be-
low 3 °C, it powers the heating element
(optional)
wrapped around the
condensate discharge siphon and the adhesive heating element inside the
control panel cover.
Antifreeze thermostat
(optional)
Clicson twin-
contact thermostat
They are powered by the antifreeze thermostat
(optional)
if boiler temperature drops below 3 °C.
Together with the standard electronic antifreeze, this protects the appliance up to -15 °C.
Anti-freeze elements
(optional)
An external circulator can be connected so that it works like the boiler circulator (M1).
Maximum input must be 1A.
External circulator
(optional)
Technical Documentation
Technical Documentation
