Internal Unit: Main Pcb (230 V~ Components) - Viessmann VITOCAL 222-S Installation And Service Instructions Manual

Installation sequence
Electrical connection

Internal unit: 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 relevant relay must not
be exceeded.
The specified current indicates the max. switching
■
current of the switching contact. Observe total cur-
rent of 5 A.
Plug sYA
Terminals Function
211.2 Secondary pump
211.5 Cooling control
AC 3-way diverter valves for heating
water buffer cylinder bypass in cool-
ing mode
Plug
sYS
Terminals Function
212.2 Heating circuit pump for heating cir-
cuit without mixer A1/HC1
A1
34
(cont.)
Set the required parameters during commissioning:
See from page 58.
Explanation
In systems without a heating water buffer cylinder, no
■
other heating circuit pump is required (see terminal
212.2).
Connect the temperature limiter to restrict the maximum
■
temperature for underfloor heating systems (if installed)
in series.
Connection values
Output: 130 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
■
Secondary pump connected at the factory; the tempera-
ture limiter must be connected on site.
Connection values
Max. output: 10 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
■
Connect the 3-way diverter valves for the bypass circuit in
parallel.
Explanation
This pump is connected in addition to the secondary
■
pump if a heating water buffer cylinder is installed.
Connect the temperature limiter to restrict the maxi-
■
mum temperature for underfloor heating systems (if
installed) in series.
Connection values
Output: 100 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
■