27
Internal unit: Expansion PCB on main PCB (function components 230 V~)
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 specified current indicates the max. switching
current of the switching contact. Observe total cur-
rent of 5 A.
■
Safety LV is unsuitable for controlling external heat
sources.
Set the required parameters during commissioning:
See from page 50.
Plug
sXS
Terminals
Function
Explanation
222.1
Switching mixer motor for external
heat generator
Signal mixer CLOSE
Connection values:
■
Output: 10 W
■
Voltage: 230 V~
■
Max. switching current: 0.2(0.1) A
222.2
Switching mixer motor for external
heat generator
Signal mixer OPEN
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:
Central heating:
■
Secondary pump, heat pump
■
External heat generator
DHW reheating:
■
3-way diverter valve for "Central
heating/DHW heating"
Floating contact
Note
■
The switching contact is a floating N/O contact that is
closed when a heat demand is issued.
■
Never route low voltage via this contact. For that, a
relay must be fitted on site.
■
The boiler water temperature sensor in the external
heat generator (plug F20) must capture the average
temperature of the external heat generator.
Connection values (contact rating):
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
Connect the high limit safety cut-out:
Central heating
■
In series to the secondary pump (connection 211.2)
■
In series for controlling external heat generators
DHW reheating
■
In series to the 3-way diverter valve (connection
211.4)
Installation sequence
Electrical connection
(cont.)
5700 542 GB
Installation
