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Appendix
1
Main PCB
2
Control panel PCB
3
All-gas sensor
4
Gas valve assembly
5
Outdoor temperature sensor, flow temperature
sensor (optional, external), DCF receiver
6
Circulation pump remote control
7
Return temperature sensor
8
Flow temperature sensor
9
Fan
10
Surface-mounted thermostat/burner off
11
24 V DC room thermostat
12
Bus connection (digital room thermostat/control)
Inspection and maintenance work – Overview
G
Note
The table below lists the manufacturer requirements with respect to minimum inspection and maintenance inter-
vals. If national regulations and directives require shorter inspection and maintenance intervals, you should ob-
serve these instead of the intervals listed in the table.
No.
Work
Check the air/flue pipe for leak-tightness and correct fastening. Make sure that it is not blocked
1
or damaged and has been installed in accordance with the relevant Installation Manual.
Check the general condition of the product. Remove any dirt from the product and the vacuum
2
chamber.
Visually inspect the general condition of the product. In doing so, pay particular attention to signs
3
of corrosion, soot and other defects.
Check the gas connection pressure at maximum heat input. If the gas connection pressure is not
4
within the correct range, carry out maintenance work.
Check the CO₂ content (the air ratio) of the product and, if necessary, adjust it. Keep a record of
5
this.
Disconnect the product from the power mains. Check that the electrical plug connections and
6
other connections are seated correctly and correct these if necessary.
7
Close the gas isolator cock and the service valves.
Drain the product on the water side (observe the pressure gauge). Check the pre-charge pres-
8
sure of the expansion vessel, and top up the vessel, if necessary (approx. 0.03 MPa/0.3 bar
under the system filling pressure).
Products with integrated hot water generation with actoSTOR only: Check the pre-charge pres-
9
sure in the shift-load cylinder's expansion vessel. Correct the pressure, if necessary.
Remove the compact thermal module.
10
Check the insulating mats in the combustion area. If you notice any damage, replace the insu-
11
lating mats. Replace the burner flange seal each time it is opened and accordingly each time
maintenance work is carried out.
Clean the heat exchanger.
12
Check the burner for damage and replace it if necessary.
13
14
Check the condensate siphon in the product, clean and fill if necessary.
Install the compact thermal module. Caution: Replace the seals.
15
Products with integrated hot water generation only: If the volume of water is insufficient or the
16
outlet temperature is not reached, replace the secondary heat exchanger if necessary.
Products with integrated hot water generation only: Clean the filter in the cold water inlet. Re-
place the filter if impurities can no longer be removed or if the filter is damaged. In this case, also
17
check the impeller sensor for dirt and damage, clean the sensor (do not use compressed air for
this) and replace the sensor if it is damaged.
18
Open the gas isolator cock, reconnect the product to the power mains and switch the product on.
44
13
Prioritising diverter valve
14
Water pressure sensor
15
Warm start sensor
16
Domestic hot water sensor
17
Internal heating circuit flow rate sensor
18
Impeller sensor
19
Internal pump
20
Gas family coding resistor
21
Additional relay (select via D.026)
22
Circulation pump
23
Ignition electrode
24
Communication unit (optional)
Installation and maintenance instructions ecoTEC exclusive 0020189875_01
Mainten-
ance
Inspection
(At least
(annual)
every
two years)
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
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