Safety Devices - Immergas NIKE Mini Export Manual

Technical documentation
PUMP RELAY
REQUEST RELAY
V/G RELAY
Heating adjustmentr
(C.H.)
Domestic hot water
potentiom. (D.H.W.)
Gas selectror (JP1)
D.h.w. modulation switch
(JP2)
Heating timer selector
(JP3)
Soft ignition trimmer
(IGN. POWER)
Heating power trimmer
(C. heating POWER)
Circulator antiblock
No ignition block
NTC delivery sensor fault
(NM)
Overheating lock
(TS1 and TS2))
STNME ed 07/03
This is a single-pole relay for controlling the pump (MP). It is excited when operation is
required.
This is a single-pole relay which is excited when the burner has to be ignited.
By means of its contact, the adjustment board ignition circuit is controlled.
This is a single-pole relay that is excited by the ignition circuit to energise the main gas
valve coils (VG).
ADJUSTMENTS
For setting the temperature of the water for heating between 38 ºC to 85 ºC.
For setting the temperature of the hot water.
With a flow of 8 litres/min and an inflow temperature of 15°C, d.h.w. temperature can be set
between 32 ºC to 57 ºC.
Depending on its position, it adapts the modulation parameters
for the gas for which the boiler is set (natural gas / LPG)
For changing modulation during the d.h.w. phase by engaging burner
switch-off (opening of REQUEST RELAY) when the set temperature
is exceeded.
Every time the unit switches off after achieving set temperature
during heating phase, a delay of 3 min/30 s is engaged until
subsequent ignition for the same request.
For regulating power to the modulation coil and consequently the pressure of the gas to
the burner during ignition (from min. up to 2/3 of max set on valve)
For regulating output during the heating phase and adapting this to system requirements
(from min up to max set on gas valve)

SAFETY DEVICES

With the main switch (IG) in SUMMER or WINTER position, the circulator (MP) is
operated for 30 seconds after 24 hours of inactivity.
If, within 10 seconds from the start of the ignition cycle, the detection electrode (E3)
fails to detect the presence of a flame on the burner, boiler operation is stopped.
To start the appliance again, the main switch (IG) will have to be temporarily returned
to RESET position and a central-heating request made.
The tripping of the safety switch is indicated by the lighting up of led LD2 (red).
In case of NTC delivery sensor (NM) breakage, the low-voltage circuit prevents burner
operation.
The tripping of this device is indicated by the flashing of yellow led LD1.
In the event of the overheating thermostat (TS1 and TS2) contact being opened, boiler
operation is stopped.
To start the appliance again, the main switch (IG) must be temporarily moved to
RESET position and a central-heating request made.
The tripping of the safety device is indicated by the flashing of led LD2 (red).
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Technical documentation
off = natural gas
on = LPG
off = set-point
switch-off
on = limit-temperat.
switch-off
off = 30 s
on = 3 min
NIKE MINI