8
1-5
1-6
INS
T
ALLER
US
ER
MAINTEN
AN
CE TECHNI
CI
AN
1.13 CIRCULATION PUMP.
The boiler is supplied with circulator fitted with
speed regulator.
These settings are suitable for most systems.
In fact, the pump is equipped with electronic
control to set advanced functions. For proper op-
eration one must select the most suitable type of
operation for the system and select a speed in the
available range, with a focus on energy savings.
By-pass Regulation (part. 16 Fig. 1-8).
The
boiler leaves the factory with all bypasses open.
If necessary, the by-pass can be regulated to
system requirements from minimum (by-pass
closed) to maximum (by-pass open). Adjust
using a flat head screwdriver, turn clockwise
and open the by-pass, anticlockwise it is closed.
Display of operation status.
During normal
operation the status LED (2) is on green, the four
yellow LEDs (3) indicate circulator absorption
according to the following table:
Circulating pump LED
Absorption
G
Y
Y
Y
Y
On On
Off
Off
Off
0
÷
25
%
G
Y
Y
Y
Y
On On
On
Off
Off
25
÷
50
%
G
Y
Y
Y
Y
On On
On
On
Off
50
÷
75
%
G
Y
Y
Y
Y
On On
On
On
On
75
÷
100
%
Selection of operating mode.
To see the current
operation mode it is sufficient to press button
(1) once.
To change operation mode press the button
for between 2 to 10 seconds until the current
configuration flashing, each time the button is
pressed all possible functions are scrolled cycli-
cally. After a few seconds without doing any
operation the circulator memorises the selected
mode and goes back to operation display.
Attention:
The circulator has various built-in
operation modes, however the constant curve
operation mode must be selected according to
the following table.
Circulating pump LED
Description
G
Y
Y
Y
Y
On On
On
Off
Off
Do not use
G
Y
Y
Y
Y
On On
On
On
Off
Constant curve
speed 2
G
Y
Y
Y
Y
On On
On
On
On
Constant curve
speed 3
(default)
G
Y
Y
Y
Y
On On
On
Off
On
Constant curve
speed 4
Constant curve: the circulator operates maintain-
ing constant speed.
Selection button lock.
The button has a feature
that locks its operation to prevent accidental
modifications, to lock the control panel it is
necessary to press button (1) longer than 10
seconds (during which the current configuration
flashes), the active lock is signalled by all LEDs of
the control panel flashing. To unlock the button
press again longer than 10 seconds.
Real time diagnostics:
in the event of mal-
function the LEDs provide information on the
circulator operation status, see table (Fig. 1-6):
Circulating pump LED
(first red LED)
Description
Diagnostics
Remedy
R
Y
Y
Y
Y
On Off
Off
Off
On
Circulator pump blocked
The circulator pump cannot restart
automatically due to an anomaly
Wait for the circulator to make auto-
matic release attempts or manually
release the motor shaft acting on the
screw in the centre of the head.
If the anomaly persists replace the
circulator.
R
Y
Y
Y
Y
On Off
Off
On
Off
Abnormal situation (the circulator
continues operating).
low power supply voltage
Voltage off range
Check power supply.
R
Y
Y
Y
Y
On Off
On
Off
Off
Electrical fault
(Circulator pump blocked)
The circulator is locked due to power
supply too low or serious malfunction
Check the power supply, if the anomaly
persists replace the circulator.
Key:
1 - Function selection button
2 - Green (G) / red (R) LED
3 - 4 yellow LEDs (Y)
Содержание NIKE MYTHOS 24 4 ERP
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