Viessmann Vitocal 300-G BW, Installation And Service Instructions Manual

Page: 178 / 216

178
e¢I Flow, cooling (heating circuit or
separate cooling circuit)
e¢O Room temperature sensor, cooling
circuit
eYP External heat source
Connection markings
■ Terminal strip X1:
Terminals 3X1.1 to 3X1.27
■ Terminal strip X2:
Terminals 3X2.1 to 3X2.27
For PCB overview, see from page 59.
Note
■ "Internal" sensors are partially (subject
to appliance version) connected
already. In that case, connect no fur-
ther sensors to these terminals:
F2, F3, F8, F9, F17, F18, F21, F23
■ Connect nothing to the following ter-
minals; these are solely intended for
internal use:
F1, F5, F10, F11, F15, F19, F22
Sensor / KM BUS Type ID Connection
Outside temperature sensor Ni 500 F0 3X1.16 / 3X2.16
Primary flow, internal Pt 500 F2 3X1.24 / 3X2.24
Primary return, internal Pt 500 F3 3X1.23 / 3X2.23
Heating water buffer cylinder Pt 500 F4 3X1.22 / 3X2.22
DHW cylinder, top Pt 500 F6 3X1.14 / 3X2.14
DHW cylinder, bottom Pt 500 F7 3X1.13 / 3X2.13
Secondary flow temperature sensor,
internal Pt 500 F8 3X1.20 / 3X2.20
Secondary return temperature sen-
sor, internal Pt 500 F9 3X1.19 / 3X2.19
Flow temperature sensor, heating
circuit with mixer M2 Ni 500 F12 3X1.10 / 3X2.10
System flow temperature sensor
(with sensor well, downstream of the
heating water buffer cylinder or
external heat source) Pt 500 F13 3X1.9 / 3X2.9
Flow temperature sensor, cooling in
the direct heating circuit A1 or sepa-
rate cooling circuit Ni 500 F14 3X1.8 / 3X2.8
Room temperature sensor, separate
cooling circuit Ni 500 F16 3X1.6 / 3X2.6
Connection and wiring diagrams
PCB 3: Sensors and KM BUS
(cont.)
5368 522 UAE