Viessmann VITOTRONIC 100 GC1B Operations Instructions Page 15

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15
Heating system designs
System version 3 (cont.)
Required coding
02 : 2 Modulating burner operation
*1
03 : 1 Oil fired operation (irreversible)
*1
0C : 1 Constant return temperature control
Automatic changeover
00 : 2 With DHW cylinder
4A: 1 Connecting temperature sensor T1 to plugaJA
4b : 1 Connecting temperature sensor T2 to plugaJB
Possible applications
Heating systems where downstream
heating circuits cannot be
controlled, e.g. older heating
systems or nurseries.
Temperature sensor T2 activates the
shunt pump if the actual temperature
falls below the required minimum
return temperature. If this does not
achieve the required minimum
return temperature, temperature
sensor T1 closes the three−way mixer
in proportion and therefore
safeguards the minimum return
temperature.
*1
If required.
5862730GB
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