14
Pos.
Description
External heat source
q
R
High limit safety cut-out for switching off the secondary pump
t
P
External heat source, e.g. oil/gas boiler
t
Q
External heat source demand (connection to heat pump control unit)
t
W
Circulation pump for cylinder heating UPSB
t
E
Boiler water temperature sensor KTS (for connection to the heat pump
control unit):
■ As contact temperature sensor
or
■ As immersion temperature sensor
t
R
Mixer motor, directly controlled
t
T
High limit safety cut-out STB 70°C (for switching off the external heat
source)
z
P
Heating water buffer cylinder
z
Q
Buffer temperature sensor PTS
z
W
System flow temperature sensor
Heating circuit with mixer M2 (KM BUS)
u
P
Underfloor heating circuit
u
Q
Vitotrol 200A remote control
u
E
Flow temperature sensor
u
R
Temperature limiter to limit the maximum temperature of underfloor heating
systems
■ As immersion thermostat
or
■ As contact thermostat
u
Z
Heating circuit pump
u
U
3-way mixer, heating circuit
Mixer motor of 3-way mixer
q
-
T
Mixer extension kit
Heating circuit without mixer A1
o
P
Radiator heating circuit
o
Q
Vitotrol 200A remote control
o
Z
Heating circuit pump
Electrical installation scheme
For an overview of the electrical connec-
tions and more information on the PCBs,
see from page 45 and the separate
service instructions for the heat pump
control unit.
For information regarding the power sup-
ply, see page 60.
Preparing for installation
System example 1, ID: 4605169_1103_04
(cont.)
5604 692 GB
