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GT 120 - GTU C 120 - GT 220 21/09/06 - 300003691-001-F
2.3 Control panel DIEMATIC 3
Electromechanical components
Display
4
A
M
P
C000142_07
1
0 2 4 6 8 1012141618202224
A
7
4
2
3 5
6
SUNDAY
-04
1 General ON
8
/ OFF
7
switch
2 Alarm indicator
3 Switch AUTO/
!
4 TEST STB button
5 Safety thermostat with manual reset (110 °C)
6 Timed circuit breaker (6 A)
7 Operating light
1 Text and numerical display
2 Graphic display bar for the programme in circuit A, B or C
3 Light area: Reduced temperature heating period or tank load
disabled
4 Dark area: Comfort temperature heating period or tank load
enabled
5 Flashing cursor showing the current time
6 Number display (current time, adjusted values, parameters,
etc.)
7 Active programme display, P1, P2, P3, P4
or
E : Summer mode activated
8 The arrows flash when setting values can be modified using
the + and - keys
9 Circuit operation symbols
>
Opening the 3-way valve
=
Closing the 3-way valve
:
Displayed circuit pump on
A, B, C Name of the circuit displayed
10 Symbol displayed above the active operating mode
11 Symbols indicating that the following inputs/outputs are
active
DHW load pump on
#
Summer mode
T
Not available
D
Burner on
With optional package AD217:
` Operation with modulating burner
Y
Burner on with an increase in the output level
X
Burner on with a reduction in the output level
D
Burner on with a constant level
` Operation with 2-stage burner
D
Burner on with 1 stage
Y
Burner on with 2 stages
8


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  • Hello, I am struggling to download the user technical manual for boiler, can you email me the manual. I want to read about the Flow return temp Submitted on 6-9-2023 at 12:42

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  • After not being used for three years the oil-fired boiler will not fire up. There is plenty of oil and both pressure gauges read correctly. On pressing the start button it tries for about 20 seconds then the red alarm light comes on. It seems like the lower pump motor runs but not the upper one. Any assistance would be greatly appreciated. Submitted on 10-4-2022 at 17:10

    Reply Report abuse
  • Hi, my boiler is on 42 degrees and can’t turn the temp down. Is it ok just to switch off. Thanks Submitted on 14-3-2022 at 20:37

    Reply Report abuse


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