Internal H2 Extension - Viessmann VITOCROSSAL Service Instructions Manual
Single boiler: 80 to 318 kw. twin boiler: 240 to 636 kw. gas condensing boiler with matrix cylinder burner. open flue and room sealed operation
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Also See for VITOCROSSAL:
- Installation instructions manual (44 pages) ,
- Installation instructions for contractors (40 pages) ,
- Installation instructions manual (36 pages)
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Internal extensions
Internal H2 extension
Fig. 46
The internal extension is integrated into the control unit
enclosure. The following alternative functions can be
connected to relay output
via coding address "53" in the "General" group:
■
Central fault message (code "53:0")
■
DHW circulation pump (code "53:1") (only for
weather-compensated operation)
Connect DHW circulation pumps with standalone
functions directly to the 230 V
(cont.)
sK
. The function is assigned
∼
supply.
An extractor fan can be switched off via connection
when the burner starts.
aBJ
Power supply for accessories and Vitotrol 100
lH
Function description
83
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