Viessmann VITOCAL 300-A, Инструкции по установке и обслуживанию для подрядчиков

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40
Plug
sXS
Terminals Function Explanation
222.3
222.4 Control of external heat
sources and 1 high limit
safety cut-out each (on site,
max. 70 °C), to switch off or
switch between the follow-
ing components:
Central heating:
■ Secondary pump, heat
pump
■ Secondary pump, heat
pump stage 2 (if installed)
■ External heat generator
Floating contact
Connection values (contact breaking ca-
pacity)
■ 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 (ter-
minal 211.2 on the main PCB)
■ In series for controlling external heat
generators (terminal 222.3)
DHW reheating:
■ Circulation pump for cyl-
inder heating
or
■ 3-way diverter valve for
"Central heating/DHW
heating"
DHW reheating:
■ In series with the circulation pump for
cylinder heating or 3-way diverter valve
"Heating/DHW heating" (terminal 211.4
on main PCB)
Installation sequence
Electrical connections, heat pump control unit
(cont.)
5516 436 GB