Immergas HERCULES Condensing 26 2 E Manual page 43

Technical Documentation
Circuito elettrico.
Electric circuit.
Operation.
By pressing the main button (
which is enabled for functioning in the DHW phase.
If the temperature detected by the DHW NTC probe (B2),
positioned on the storage tank, is lower than the setting made
on the control panel (or on the CAR or Super CAR if mounted)
and if the contact of the system pressure switch (S5) is closed
(pressure detected in the primary circuit higher than minimum
value), the integrated P.C.B uses the K2 relay to power the
boiler pump (M1), after which by diversion of the K4 relay
contact it powers the motor (M) of the 3-way valve (M30).
This functions until the end run switch "2" opens when the
DHW position is reached.
Successively the integrated P.C.B. powers the fan (M20) and
manages the speed.
With the consent of the safety thermostat (E4) and the flue
safety thermostat (E6) and the fan (M20) reaching the "validate
ignition" speed, the integrated P.C.B. allows to start the igni-
tion cycle by controlling, first the ignition electrodes (E1) by
means of the K7 igniter relay and then the K3 request relay,
both the coils of the gas valve (Y1).
The ignition of the burner is detected by the integrated P.C.B.
by means of the ionisation electrode (E2).
STHCkW ed 04/09
) boiler activation is enabled,
Technical Documentation
SAFETY EXTRA LOW
VOLTAGE CIRCUIT
CH ON
41
Super CAR remote
control (Optional)
SIGNAL
STATE
IMG BUS
link
RELAY BOARD (Optional)
Link for
VIRGILIO palmtop
Microprocessor
programming connector
Storage tank
function
jumper
HERCULES Condensing Export