Viessmann VITOTRONIC 200 Service Instructions Manual page 285

Main and expansion PCB
Plug sXS
Terminals Function
222.1 /
Control of mixer motor for external
heat generator
Signal mixer CLOSE
222.2 /
Control of mixer motor for external
heat generator
Signal mixer OPEN
222.3 /
222.4 Control of external heat generators
and 1 high limit safety cut-out each
(on site, max. 70 °C), to switch off or
switch between the following compo-
nents:
Central heating:
Secondary pump, heat pump
■
External heat generator
■
DHW reheating:
3-way diverter valve "Central heat-
■
ing/DHW heating"
Plug
sXD
Terminals Function
223.1 Central fault message
223.2
U
Plug
sXF
Terminals Function
224.4 Instantaneous heating water heater
switching, stage 2.
2.
r
224.6
:
Cylinder loading pump (DHW side)
:
2-way shut-off valve
M
(cont.)
:
:
:
PCBs and connection options
Explanation
Connection values
Output: 10 W
■
Voltage: 230 V~
■
Max. switching current: 0.2(0.1) A
■
Connection values
Output: 10 W
■
Voltage: 230 V~
■
Max. switching current: 0.2(0.1) A
■
Floating contact
Connection values (contact load)
Voltage: 230 V~
■
(not suitable for safety LV)
Max. switching current: 4(2) A
■
Connections for high limit safety cut-outs
Central heating:
In series to the secondary pump (terminal 211.2 on
■
the main PCB)
In series for controlling the external heat generator
■
(terminal 222.3)
DHW reheating:
In series to 3-way diverter valve "Central
■
heating/DHW heating" (terminal 211.4 on the main
PCB)
Explanation
Floating contact:
Closed: Fault
■
Open: No fault
■
Not suitable for safety LV
■
Connection values (contact load)
Voltage: 230 V~
■
Max. switching current: 4(2) A
■
Explanation
Connection values
Output: 10 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
■
Connect cylinder loading pump and 2-way shut-off
valve in parallel.
Connection values
Output: 130 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
■
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