Low Voltage Circuit - Immergas NIKE Mini Export Manual

Technical documentation
Circulating pump
(MP)
Gas valve (VG)
(main coils)
Ignition electrodes
(E1 - E2)
Programmer clock
(OP)
(optional)
Main switch
(IG)
Delivery sensor
(NM)
Domestic hot water switch
(SS)
Flue thermostat
(TF)
Programmer clock switch
(OP)
(optional)
STNME ed 07/03
LOADS
This is powered by the adjustment board whenever there is a demand for heating, domestic
hot water or antifreeze.
Permits circulation of water in the boiler circuit.
This is powered by the ignition circuit of the adjustment board when the burner has to be
ignited.
Permits flow of gas to the burner.
This is controlled by the ignition circuit of the adjustment board which provokes an electric
spark that ignites the air/gas mix.
This clock operates a switch (see low-voltage circuit safety devices and controls) enabling
or disabling boiler operation during heating for the selected time intervals.
This is powered with main switch in position 0. SUMMER and WINTER.

LOW VOLTAGE CIRCUIT

SAFETY DEVICES AND CONTROLS
Depending on position, permits:
0 - circuit not powered
- hot water operation
(SUMMER)
- hot water and heating operation
(WINTER)
- resets after the no ignition or high temperature
RESET
safety device have been activated (the RESET
position operates at mains voltage, closing a
contact that acts on the ignition circuit)
This permits to the modulation board to determine the temperature of the
water supply of the primary circuit.
Any breakage will stop burner operation.
Until the serial number 2243650 it was positioned in immersion in a
sump located on the three way valve body.
From serial number 2243651 it is located at the outlet of the primary heat
exchanger .
Following sampling of hot water, this affects the adjustment board so the
boiler starts up during the hot water mode.
When idle this enables operation during the heating mode.
In the event of weak stack draught, this affects the adjustment board,
preventing boiler operation for 30 minutes.
It is located on the draught diverter
Operates on adjustment board, enabling operation of the boiler during
heating at selected times.
If this is mounted singly, connection is made on terminals 6 and 9 of
connector M3 after removing pre-existing jumper P1.
When fitted together with an room thermostat (TA) it must be connected
to terminals 6 and 7 of connector M3 after removing the pre-existing
jumper P1.
16
Technical documentation
3-position double
switch + reset
button
NTC sensor
10 kohm 25 ºC
Double-contact
switch
Double-contact
clicson thermostat
Double-contact
switch
NIKE MINI