Viessmann Vitocal 222-S Installation And Service Instructions For Contractors page 39

Electrical connection
Indoor unit: Main PCB (230 V~ components)
Information regarding the connection values
The specified output is the recommended connected
■
load.
■ Total output of all components connected directly to
the heat pump control unit (e.g. pumps, valves, mes-
sage facilities, contactors): Max. 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
1.
211.3 Control of instantaneous heating wa-
ter heater, stage 1
1.
r
211.5 Type AWBT(-M)-E-AC:
AC 3-way diverter valves for heating wa-
ter buffer cylinder bypass in cooling
mode
Plug
sYS
Terminals Function
212.2 Heating circuit pump for heating cir-
cuit without mixer A1/HC1
A1
(cont.)
Set the required parameters during commissioning:
See page 73 onwards.
Explanation
In systems without a heating water buffer cylinder, no
■
other heating circuit pump is required: See terminal
212.2.
Connect a temperature limiter to restrict the maximum
■
temperature for underfloor heating circuits (if instal-
led) in series.
Connection values
Output: 140 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.
Connection values
Output: 10 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
■
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
■
Installation sequence
39