Vitotronic 300, GW2B Installation and Service
5693 982 - 04
30
Preparing for Installation
System Example 4
(continued)
Mixing valve extension PCB
Required code
0d:0
“Boiler” group
Without Therm-Control temperature sensor.
System Extension
Rated current
2 A~
If the circulation pump power consumption is above 2 A,
use a contactor relay.
Required code
Group
Function
33:3
1 “General”
Function output A1 at extension AM1:
Circulation pump – flue gas/water heat exchanger
System versions where output
sÖ
A1 is already used
as a switching contact
Use extension AM1
A
(accessory).
