Viessmann VITOPEND 100-W Installation And Service Instructions Manual page 42

10.5 to 24 kw and 13 to 30 kw. gas fired central heating and combi boilers for open flue operation. natural gas and lpg version
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Designs
Connection and wiring diagrams
%
Cylinder temperature sensor
(gas fired central heating
boiler)
Internal circulation pump
dG
Gas solenoid valve
fJ
Temperature limiter
42
(cont.)
a-ÖaBL Interlocking of extractors via
external extension H3
aVL
Flow switch
aNS
Flue gas monitoring sensor
a:Ö
Modulation coil

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