Dhw Mode - Immergas NIKE Star 24 3 E Technical Documentation Manual

Technical documentation Technical documentation
Electric circuit.

DHW mode.

LOW
VOLTAGE
HIGH
VOLTAGE
CONTROL LOGIC MICROPROCESSOR
USER INTERFACE
Operation.
by means of the ionisation electrode (E3).
By using the button (S2) to select (Summer) (Estate) or
(Winter) functioning, boiler functioning in the CH mode
is enabled.
A withdrawal of DHW causes the closure of the DHW
flow switch contact (S4) and enables functioning in DHW
mode.
The board checks closure of the system pressure switch contact
(S5) (pressure detected in the primary circuit exceeding minimum
value).
The boiler pump (M1) is not made to function in DHW
or is switched off when there is a CH request in progress
following the opening of relay K3.
If the temperature detected by the DHW NTC probe (B2) is
below the setting on the boiler control panel (or on the CRD
if mounted) boiler ignition is requested.
With the consent of the safety thermostat (E4) and the con-
sent of the flue safety thermostat (E6), the board closes the
contact of relay K4 and requested relay K2. This causes the
closure of the 2 contacts, allowing to start the ignition cycle,
first controlling the ignition electrode (E3) and successively,
both coils of the gas valve (Y1).
The ignition of the burner is detected by the integrated P.C.B.
STNS3E ed 09/08 NIKE Star 24 3 E
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