Immergas NIKE MYTHOS 24 2 E, Instruction And Warning Book

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11
INS
TALLER
US
ER
MAINTEN
AN
CE TECHNI
CI
AN
Boiler ignition
. Before ignition make sure the
heating system is filled with water and that the
manometer (7) indicates a pressure of 1 ÷ 1.2 bar.
- Open the gas cock upstream from the boiler.
- Press key (2) and set the boiler on Summer (
) or Winter ( ).
N.B.:
the button (2) must be pressed and
held for the time required to switch from the
Stand-by ( ), Summer ( ) or Winter ( )
function.
Attention: after each switch the button must
in any case be released to switch to the next
function.
When in summer position ( ) the domestic
hot water temperature is adjusted with the but-
tons (3-4).
When the winter position is selected ( ) the
system water temperature is adjusted with the
buttons (5-6), whilst the domestic hot water
temperature is adjusted using the buttons (3-4),
by pressing (+) to increase and (-) to reduce the
temperature.
From this moment the boiler functions auto-
matically. With no demand for heat (heating or
domestic hot water production) the boiler goes
to “standby” function, equivalent to the boiler
being powered without presence of flame. Each
time the boiler ignites, the relative flame present
symbol is displayed (15).
2.5 TROUBLESHOOTING.
In the event of an anomaly the boiler backlight
turns from green to red on and the relative error
codes, listed in the table, flash on the display.
Anomaly signalled
code
error
No ignition block 01
Over-heating (safety) thermostat
block
02
Flue safety thermostat anomaly 03
Electro-mechanical contacts 04
Flow probe anomaly 05
Insufficient system pressure 10
Parasite flame 20
Insufficient circulation 27
Loss of remote control commu-
nication
31
Ignition block. The boiler ignites automatically
with each request for room heating or hot water
production. If the burner does not ignite within
10 seconds, the boiler goes into "ignition block"
(code 01). To eliminate “ignition block” the Reset
button (1) must be pressed. On commissioning
or after extended appliance downtime, it may
be necessary to eliminate the “ignition block”. If
this phenomenon occurs frequently, contact an
authorised company (e.g. Immergas After-Sales
Technical Assistance Service).
Overheating thermostat block.
During normal
operation, if a fault causes excessive overheating
internally, the boiler goes into overheating block
(code 02). After allowing to cool, eliminate the
"overheating block" by pressing the Reset key (1).
If this phenomenon occurs frequently, contact an
authorised company (e.g. Immergas After-Sales
Technical Assistance Service).
Flue safety thermostat anomaly. If the flue
evacuation pipe does not work properly during
functioning, the flue thermostat intervenes by
blocking the boiler (code 03). The boiler will
automatically restart after 30 minutes if normal
conditions resume without having to be reset.
If the flue thermostat intervenes 3 times in less
than two hours (code 03), it is necessary to reset
the boiler manually by pressing the Reset button
(1). If this anomaly persists, contact a qualified
technician for assistance (e.g. Immergas After-
Sales Service).
Electro-mechanical contacts
This occurs when
the safety thermostat, the fume pressure switch or
the system pressure switch do not work properly
(code 04). The boiler does not start; try resetting
the boiler. If the anomaly persists contact an
authorised company (e.g. Immergas After-Sales
Technical Assistance Service).
Delivery probe anomaly
If the board detects an
anomaly on the flow probe (code 05), the boiler
will not start; contact an authorised company
(e.g. Immergas After-Sales Technical Assistance
Service).
Insufficient system pressure. Water pressure
inside the heating system (code 10), sufficient to
guarantee the correct functioning of the boiler,
is not detected. Check that the system pressure
is between 1÷1.2 bar.
Parasite flame.
This occurs in the event of a leak
on the detection circuit or anomaly in the flame
control unit (code 20); try to reset the boiler.
If the anomaly persists contact an authorised
company (e.g. Immergas After-Sales Technical
Assistance Service).
Insufficient water circulation. This occurs if
the boiler overheats due to insufficient water
circulating in the primary circuit (code 27); the
causes can be:
- low system circulation; check that no shut-off
devices are closed on the heating circuit and
that the system is free of air (deaerated);
- pump blocked; free the pump.
If this phenomenon occurs frequently, contact an
authorised company (e.g. Immergas After-Sales
Technical Assistance Service).
Loss of Remote Control communication. This
occurs 1 minute after loss of communication
between the boiler and the remote control (code
31). To reset the error code, remove and re-apply
voltage to the boiler. If this phenomenon occurs
frequently, contact an authorised company (e.g.
Immergas After-Sales Technical Assistance
Service).
Boiler shutdown.
Press the button (2 Fig. 2-1)
( ) until the symbol ( ) appears on the
display.
N.B.: in these conditions the boiler is still
powered.
Disconnect the external omnipolar boiler switch
and close the gas cock upstream of the appliance.
Never leave the boiler switched on if left unused
for prolonged periods.
2.6 RESTORING CENTRAL HEATING
SYSTEM PRESSURE.
Periodically check the system water pressure.
The boiler manometer should read a pressure
between 1 and 1.2 bar.
If the pressure is below 1 bar (with the circuit cool)
restore normal pressure via the filling cock located
in the lower part of the boiler (Fig. 2-2).
N.B.: close the filling cock after the operation.
If pressure values reach around 3 bar the safety
valve may be activated.
In this case contact a professional technician
for assistance.
In the event of frequent pressure drops, contact
qualified staff for assistance to eliminate the pos-
sible system leakage.
2.7 SYSTEM DRAINING.
To drain the boiler, use the special draining
valve (Fig. 2-2).
Before draining, ensure that the filling valve is
closed.