Internal H2 Extension - Viessmann Vitodens 222-F Installation Instructions For Contractors

Internal extensions (accessories)

Internal H2 extension

Fig. 63
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.
Heating circuit pump for heating circuit without mixer
■
(code "53:2")
■ Circulation pump for cylinder heating (code "53:3")
An extractor fan can be switched off via connection
when the burner starts.
aBJ
Function description
95