Internal Extensions (Accessories) - Viessmann VITODENS 200-W Installation And Service Instructions Manual

Function description

Internal extensions (accessories)

Internal H1 extension
Fig. 69
The internal extension is integrated into the control unit
enclosure. The following alternative functions can be
connected to relay output
via parameter "53" in the "General" group:
Central fault message (parameter "53:0")
■
■ DHW circulation pump (parameter "53:1") (only for
weather-compensated operation)
Connect DHW circulation pumps with standalone
functions directly to the 230 V
142
. The function is assigned
sK
∼
supply.
■ Heating circuit pump for heating circuit without mixer
(parameter "53:2")
■ Circulation pump for cylinder heating (parameter
"53:3")
An external safety valve can be connected to connec-
tion gD .