G Inspection And Maintenance Work - Overview - Vaillant ecoTEC exclusive VC 156/5‑7 N-DE Installation And Maintenance Instructions Manual

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 to ensure that it is fastened correctly. Make sure
1 that it is not blocked or damaged and has been installed in accordance with the relevant set-up
instructions.
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 flow pressure at maximum heat input. If the gas flow pressure is not within the
4
correct range, carry out maintenance work.
Check the product's CO₂ content (air ratio) and adjust this, if required. Keep a record of this.
5
Disconnect the product from the power grid. Check that the electrical plug connections and other
6
connections are seated correctly and correct these if necessary.
Close the gas stopcock and the service valves.
7
Drain the product on the water side (observe the manometer). Check the pre-charge pressure
8 of the expansion vessel and top the vessel up, if necessary (approx. 0.3 bar below the system
filling pressure).
Remove the compact thermal module.
9
Check the insulating mats in the combustion area. If you notice any damage, replace the insu-
10 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.
11
Check the burner for damage and replace it if necessary.
12
13 Check the condensate siphon in the product, clean and fill if necessary.
Install the compact thermal module. Caution: Replace the seals.
14
Open the gas stopcock, reconnect the product to the mains and switch it on.
15
Open the service valves, fill up the product/heating installation to 1.0-2.0 bar (depending on the
16
static height of the heating installation) and start the purging programme P.00.
Run a function test for the product and the heating installation – especially the domestic hot
17
water generation. Then purge the installation again, if required.
Check the gas type.
18
19 Visually inspect the ignition and burner behaviour.
20 Check the CO₂ content (the air ratio) of the product again.
46
13 Prioritising diverter valve
14 Water pressure sensor
15 Cylinder temperature sensor
16 Cylinder contact "C1/C2"
17 Internal heating circuit flow rate sensor
18 Internal heating circuit differential pressure 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 0020186710_06
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
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X
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X
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X