Viessmann Vitodens 242-F Installation And Service Instructions Manual page 61

Matching the control unit to the heating system
System version 3
One heating circuit without mixer A1 and one heating circuit with mixer M2
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Fig. 54
Vitodens 242-F
1
Outside temperature sensor
2
Heating circuit without mixer A1
3
Heating circuit with mixer M2
4
Temperature limiter to restrict the maximum tem-
5
perature of underfloor heating systems
Note
The flow rate of the heating circuit without mixer must
be at least 30 % greater than the flow rate of the heat-
ing circuit with mixer.
Function/system components
Operation with LPG
System with only one heating circuit with mixer, with extension kit for
mixer with DHW heating
System with DHW circulation pump:
DHW circulation pump connected at internal H1 or H2 extension
3
2
1
6
7
8
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Commissioning, inspection, maintenance
(cont.)
4
5
6
7
8 M
Flow temperature sensor M2
Heating circuit pump M2
Extension kit for one heating circuit with mixer M2
Solar collectors
Collector temperature sensor
Setting
82:1
00:4
Code
Group
"General"
"General"
— —
61