Viessmann Vitocrossal 300 Service Instructions For Contractors page 115
Gas condensing boiler with matrix gas burner and lambda pro control, natural gas and lpg version open and balanced flue operation
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Also See for Vitocrossal 300:
- Service instructions manual (164 pages) ,
- Service manual (108 pages) ,
- Installation instructions manual (56 pages)
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Internal extensions (accessories)
The internal extension is integrated into
the control unit casing.
Internal extension H2
The internal extension is integrated into
the control unit casing.
(cont.)
■ A central fault message facility can be
connected to relay output "A1".
■ An external safety valve can be con-
nected to gD
■ A central fault message facility can be
connected to relay output "A1".
■ An extractor fan can be switched off
via connection aBJ when the burner
starts.
Function description
115
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