Main Pcb (Function Components 230 V~) - Viessmann Vitocal 300-A Installation And Service Instructions Manual

Electrical connections, heat pump control unit

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 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
sYA
Terminals Function
211.2 Secondary pump (installation in the
secondary circuit flow)
211.3 Instantaneous heating water heater
switching, stage 1.
1.
r
211.4
Circulation pump for cylinder heat-
■
ing
or
r 3-way diverter valve for "Central
M
■
heating/DHW heating"
211.5 Cooling control
AC 3-way diverter valves for heating wa-
ter buffer cylinder bypass in cooling
mode
(cont.)
Set the required parameters during commissioning:
See from page 56.
Explanation
No further heating circuit pump is required in systems
■
without a heating water buffer cylinder: See terminal
212.2.
Connect a temperature limiter to restrict the maximum
■
temperature for underfloor heating circuits (if instal-
led) in series: See the following chapter.
Connection values
Output: 130 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
■
Connection values
Output: 10 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
■
Connection values
Output: 130 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
■
Connection values
Output: 10 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
■
Connect the 3-way diverter valves for the heating water
buffer cylinder bypass in parallel.
Installation sequence
29