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11 Filling system
The central heating installation needs to be filled with potable water according to the requirements in chapter
9.3 'Water quality'. For filling the CH installation, use the the feed and expansion header tank. Use the
following procedure:
1 Ensure all system and boiler drain points are closed;
2 Open all isolation and motorised valves;
3 Turn on the water supply to the system header tank
4 Vent all radiators and pipework;
5 Check system for any visable leaks;
When powering up the boiler (described in chapter 13) an automatic de-aeration program will run to vent the
boiler.
12 Boiler controls
Before the electrical power is switched on, it helps to know the operation of the boiler in advance. On this
page the controls are described in short. The next page describes the button functions and the symbols on
the display.
Resistance table sensors ATAG iC-, iS- and iR-series
Outside sensor T4
NTC1k (25°C)
Temperature
Resistance Temperature
[°C]
[Ohm]
-10
4.574
-9
4.358
-8
4.152
-7
3.958
-6
3.774
-5
3.600
-4
4
3.435
3.435
-3
3.279
-2
3.131
-1
2.990
0
2.857
1
2.730
2
2.610
3
2.496
4
2.387
5
2.284
6
2.186
7
2.093
8
2.004
9
1.920
10
1.840
11
1.763
63
12
1.690
13
1.621
14
1.555
15
1.492
16
1.433
17
1.375
18
1.320
19
1.268
20
1.218
21
1.170
22
1.125
23
1.081
24
1.040
25
1.000
26
962
27
926
28
892
29
858
30
827
35
687
40
575
Resistance table
32
The boiler is equipped with self-managing control system. This control
system takes over a large part of the manual settings, which simplifies
Flow sensor T1
Return sensor T2
the start-up of the installation considerably.
DHW sensor T3
Flue sensor T5
NTC10k (25°C)
After filling the installation and switching on the electrical power supply a
Resistance
short start-up program is activated. This shows all digits, boiler type and
[°C]
[Ohm]
-10
55.047
software version.
0
32.555
After parameter P0 is set, the automatic de-aeration program is
10
19.873
12
18.069
activated. The automatic de-aeration program lasts for approx. 7 minutes
14
16.447
and stops automatically. Then the boiler will switch on for the enabled
16
14.988
18
18
13.674
13.674
program.
20
12.488
22
11.417
24
10.449
CH controls
26
9.573
With a demand from the heating controls, the boiler activates its 1
28
8.779
30
8.059
minute delay period. This is to prevent the heat exchanger from losing
32
7.406
34
6.811
its heat too quickly in the event of a hot water demand. Then the pump
36
6.271
starts and after 30 seconds the gradient control becomes active.
38
5.779
The starting point of the gradient control is the currently existing flow
40
5.330
42
4.921
temperature. A Delta-T control (25K) ensures a stable control according
44
4.547
46
4.205
to heat request.
48
8
3 89
3.892
If the flow temperature is below the T-set value of 20°C the boiler will
50
3.605
52
3.343
immediately start.
54
3.102
If during a demand from the heating the burner switches off, because the
56
2.880
desired flow temperature is exceeded, there will be an anti-cycle time in
58
2.677
60
2.490
operation for 5 minutes. This means that the burner switches on again
62
2.318
64
2.159
after 5 minutes if there is still a demand from the heating.
66
2.013
68
1.878
70
1.753
The ATAG iR is equipped with boiler sensors of 10kOhm. The resistance
72
1.638
value and corresponding temperature are shown in the accompanying
74
1.531
76
1.433
table.
78
1.341
80
1.256
82
1.178
84
1.105
86
1.037
88
974
90
915
table 12.a
Installation & Servicing instructions ATAG iR-Range
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