Immergas HERCULES SOLAR 26 1A Manual page 40

Technical Documentation
"CH RAMP" parameter.
Successively, flame modulation takes place with reference to the
difference between the temperature set on the boiler control
panel and that detected by the DHW probe (B1).
On exceeding (+5°C) the temperature set, the burner is
switched off. The re-ignition time depends of the setting of
the "IGNITION TIMER." parameter.
Every time the burner switches off the fan functions for
35 seconds and the pump performs post-circulation for 10
seconds.
Central heating request with Remote Control
In the case of connection to the CAR or Super CAR remote
control, the boiler automatically detects the display and the (
) symbol appears on the display.
If the conditions detected by the remote control (CAR or
Super CAR remote control) require ignition in CH mode (CAR
SUM/WIN selector switch in WINTER position or Super CAR
remote control button functioning
adjustment higher than that detected by the central heating flow
probe (B1), requested by the hourly programmer, room temperature
adjustment higher than that detected), the integrated P.C.B.
manages the burner ignition cycle as described previously.
N.B.: By pressing the main switch (
into Stand-by, the CAR remote control will show the "CON"
connection error symbol and the "ERR>CM" error will appear
on the Super CAR remote control. The remote control is kept
powered without losing the memorised programs.
DHW request
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 unit drops below the value
defined with the "DHW OFF" parameter with respect to the
set DHW temperature, the boiler starts an ignition cycle in
DHW mode.
If the system pressure switch contact (S5) is closed (pressure
detected in the primary circuit higher than minimum value), the
integrated P.C.B. powers the pump (M1) and 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 ignition cycle by controlling, first the ignition electrodes
(E1) and then 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).
When the flame has been detected, the fan speed is increased
in a way to immediately reach (if requested) the maximum
adjusted value or that necessary to reach the set temperature.
Successively, the flame modulation guarantees maintenance
of the flow temperature ideal for the attainment of the set.
When the temperature measured by the DHW probe (B2)
exceeds the value requested (temperature set), the burner is
STHSC ed 0710
(Winter), CH temperature
) and taking the boiler
) boiler activation is enabled,
Technical Documentation
switched off.
Every time the burner switches off the fan functions for
35 seconds and the pump performs post-circulation for 60
seconds.
If, during functioning, the CH flow probe (B1) measures a
temperature higher than 90 °C, the burner is switched off. A
new ignition cycle can start only if the temperature drops to
75 °C.
Central heating anti-freeze request
When the temperature detected by the CH flow probe (B1)
falls below 4 °C, the board gives consent for ignition and keeps
the generator working with the burner at minimum output
until a boiler temperature equal to 42 °C is reached (radiators
anti-freeze).
The anti-freeze function is not activated if the main boiler
button is selected ( ) (Stand-by).
DHW anti-freeze request
If the temperature detected by the DHW probe (B2) falls
below 4 °C, the board gives consent for boiler ignition and
keeps the generator working with the burner at minimum
output until a temperature of 20 °C is reached. Post-circulation
is then activated in the central heating mode with duration
of 150 seconds.
During functioning, the water in the primary circuit remains
below 42 °C as on reaching this temperature the board switches
the burner off.
If the DHW anti-freeze is activated in concomitance with
a central heating request, the DHW anti-freeze is served
for 2 minutes and the central heating request for 6.5
minutes(continuously).
The anti-freeze function is not activated if the main boiler
button is selected ( ) (Stand-by).
"Chimney sweep" request
Press the Reset button "C" for a time between 8 and 15 seconds,
on its release the board gives consent for ignition of the generator
and keeps it functioning for 15 minutes.
Using the CH regulation knob, it is possible to modify the power
supplied by the burner from the maximum and minimum set.
During this period only the limit thermostat function is
respected (90 °C), which is performed by the central heating
flow probe (B1).
The function is signalled by the relative symbol and the code
"07" on the remote control display (if mounted).
It can be interrupted by pressing the main button (
off position or after 15 minutes have passed.
System deaeration function
To activate the "DEAERATION" function, press buttons "A
and B" at the same time for 5 seconds with boiler in stand-by.
The function consists in the cyclic activation of the pump (100
s ON, 20 s OFF) and the 3-way valve (120 s domestic hot water,
120 s central heating).
The function ends after 18 hours or by switching the boiler
on using the ignition button (
38
) in the
).
HERCULES Solar 26 1A