Service" Test Mode - Viessmann Vitotron 100 Series Installation And Operating Instructions Manual

Installation sequence

"Service" test mode

"Service" test mode is available at:
SERVICE/CONFIGURATION -> CONFIGURATION -> SERVICE
Fault code: 15
P Calculated output [kW]
An approximate value, calculated based on the flow value and the differential between the flow and
return temperatures.
Q Current flow rate [l/min]
Tin Actual return temperature [°C]
Tout Actual flow temperature [°C]
T Triac test function
h Default setting for pump head [m] (this change only applies to SERVICE mode)
Z3D Currently selected flow direction in the three-way valve [central heating, DHW]
EXIT Exit SERVICE mode
Using SERVICE mode:
1. Setting the pump head – h (checking the flow rate)
A change in the pump head height has a direct impact on the flow rate. The flow rate must be selected
to match the heating system. In general, the following conversions can be used for the flow rate:
Radiator system – approx. 0.8 l/min/kW
Underfloor heating installation – approx. 1.5 l/min/kW
To achieve the same flow rate during normal boiler operation, set the same head under
Configuration/Pump > Head
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