Viessmann Vitotwin 300-W Installation And Service Instructions For Contractors page 9

Preparing for installation
HV2/HR1 Heating water flow,
Vitotwin 300-W
HR2 Heating water flow, heating
circuit
HR3 Heating water return, heat-
ing circuit
Equipment required
Pos. Designation
1 Vitotwin 300 W
with
2
Weather-compensated control unit
2B Junction box for sensors and accessories (low voltage)
3A Remote control unit FBE
3B
Wireless base station FB
4 Outside temperature sensor ATS
5 Cylinder temperature sensor STS B3
6 Buffer temperature sensor PTSO B4, top
7 Sensor for power demand function B41
8 Buffer temperature sensor PTSU B42, bottom
DHW heating
wP Multi mode heating water buffer cylinder with integral DHW heating
Vitocell 340-M
wQ DHW circulation pump CP (electrical connection on site)
wW Automatic thermostatic mixing valve
rP Heating circuit 1 with mixer
rQ Extension kit for one heating circuit with mixer with integral mixer motor
and
rW Flow temperature sensor heating circuit M1
rE Heating circuit pump, heating circuit M1
rR
3-way mixer
or
Divicon (with 3-way mixer and heating circuit pump)
tP Heating circuit 2 with mixer
tQ Extension kit for one heating circuit with mixer with integral mixer motor
and
tW Flow temperature sensor, heating circuit M2
tE
Heating circuit pump, heating circuit M2
tR 3-way mixer
or
Divicon (with 3-way mixer and heating circuit pump)
(cont.)
KW
E
HVS/HRS Heating water return,
Preparing for installation
Cold water
Drain
Vitotwin 300-W
9