The flue pipe is deemed to be gas-
tight if the CO
2
concentration in the
combustion air is no higher than 0.2 %
or the O
2
concentration is at least
20.6 %.
If actual CO
2
values are higher or O
2
values are lower, then pressure test
the flue pipe with a static pressure of
200 Pa.
Removing the burner and checking the burner gasket
(replace gasket every 2 years)
1.
Switch OFF the control unit ON/
OFF switch and the power supply.
2.
Close the gas shut-off valve and
safeguard against reopening.
3.
Pull cables from fan motor
A
, gas
train
B
, ionisation electrode
C
,
ignition unit
D
and earth tab
E
.
4.
Undo gas supply pipe fitting
F
.
Further details regarding the individual steps
(cont.)
17
Commissioning, inspection, maintenance
5692
673
GB
Содержание VITODENS 300-W
Страница 106: ...aND Water pressure sensor a Modulation coil Connection and wiring diagram internal cont 106 Designs 5692 673 GB...
Страница 107: ...A1 Main PCB A2 Power supply unit Connection and wiring diagram external connections 107 Designs 5692 673 GB...
Страница 111: ...Parts lists cont 111 Parts lists 5692 673 GB...
Страница 112: ...Parts lists cont 112 Parts lists 5692 673 GB...
Страница 113: ...Parts lists cont 113 Parts lists 5692 673 GB...
Страница 114: ...Parts lists cont 114 Parts lists 5692 673 GB...
Страница 121: ...121 5692 673 GB...
Страница 122: ...122 5692 673 GB...
Страница 123: ...123 5692 673 GB...