Expansion Pcb On Main Pcb (230 V~ Components) - Viessmann Vitocal 300-G Series Installation And Service Instructions Manual

Electrical connection

Expansion PCB on main PCB (230 V~ components)

Information regarding the connection values
The specified output is the recommended connected
■
load.
■ The total output of all components connected directly
to the heat pump control unit (e.g. pumps, valves,
message facilities, contactors) must not exceed
1000 W.
If the total output is < 1000 W, the individual rating of
a component (e.g. pump, valve, message facility,
contactor) can be greater than specified. However,
the breaking capacity of the corresponding relay
must not be exceeded.
The stated current indicates the max. switching cur-
■
rent of the switching contact (observe the total cur-
rent of 5 A).
■ Controls for external heat source and central fault
messages are unsuitable for safety LV.
Plug
sXS
Terminals Function
222.1 Control of mixer motor for external
heat generator
Mixer CLOSE signal
222.2 Control of mixer motor for external
heat generator
Mixer OPEN signal
222.3 Control of external heat generators
222.4 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
■
Secondary pump, heat pump stage
■
2 (if installed)
External heat generator
■
DHW reheating:
Circulation pump for cylinder heat-
■
ing
or
3-way diverter valve "central heat-
■
ing/DHW heating"
(cont.)
Set the required parameters during commissioning:
See page 50 onwards.
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 breaking capacity)
Voltage: 230 V~
■
(not suitable for safety LV)
Max. switching current: 4(2) A
■
Connections for high limit safety cut-outs for central
heating:
In series to the secondary pump (terminal 211.2 on
■
the main PCB)
In series to the secondary pump, heat pump stage 2
■
(terminal 224.3)
In series for controlling the external heat generator
■
(terminal 222.3)
Connections for high limit safety cut-outs for DHW re-
heating:
In series with the circulation pump for cylinder heating
■
or 3-way diverter valve "central heating/DHW heating"
(terminal 211.4 on main PCB)
Installation sequence
25