
K
Kelvin, temperature difference
kWh
L
L
Phase
L'
Contactor phase
M
M
3-way mixer/3-point output, pre-mixing circuit
min
Minutes
MWh
Megawatt hours
N
N
Neutral conductor
Reheating
Reheating secondary
Mains
Mains connection 230V VAC
P
PE
Earth
PP
Primary pump
R
RLS
Return flow switch
S
Setpoint
Temperature calculated by the operator or by the con-
troller at which the controller regulates the actual
value.
T
TBZ
Temperature of domestic hot water/domestic water
circulation
TKW
Temperature of domestic cold water - secondary heat
exchanger inlet
TO1
Temperature of tank at top/heat source
TPR
Primary return temperature
TPV
Primary flow temperature
TU1
Temperature of tank at bottom
TWW
Temperature of domestic hot water - secondary heat
exchanger outlet
V
VSR
Return flow switch changeover valve
W
ES 5941
Troubleshooting support
08/2020 Item no. 215790 EA no. 1321
Operating instructions
50