27
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.
Set the required parameters during commissioning:
See page 51 onwards.
Plug
sXS
Terminals
Function
Explanation
222.1
Control of mixer motor for external
heat generator
Mixer CLOSE signal
Connection values
■
Output: 10 W
■
Voltage: 230 V~
■
Max. switching current: 0.2(0.1) A
222.2
Control of mixer motor for external
heat generator
Mixer OPEN signal
Connection values
■
Output: 10 W
■
Voltage: 230 V~
■
Max. switching current: 0.2(0.1) A
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:
Floating contact
Connection values (contact breaking capacity)
■
Voltage: 230 V~
(not suitable for safety LV)
■
Max. switching current: 4(2) A
Central heating:
■
Secondary pump, heat pump
■
Secondary pump, heat pump stage
2 (if installed)
■
External heat generator
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)
DHW reheating:
■
Circulation pump for cylinder heat-
ing
or
■
3-way diverter valve "central heat-
ing/DHW heating"
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
Electrical connection
(cont.)
5855006
Installation
