Controller And Sensor Pcb - Viessmann KWT Vitocal 300-G Pro Installation And Service Instructions Manual

Installation sequence
Overview of electrical connections

Controller and sensor PCB

X2
X3
sVA
J3
J4
X18
F23
F26
Fig.35
F.. Connections for temperature sensors: See the
following table.
J3 Jumper for terminator Modbus 2
Terminator enabled
Terminator disabled
J4 Jumper for setting master/slave, Modbus 2
Heat pump control unit is slave.
Heat pump control unit is master.
X2 Connection for main PCB power supply
X3 Connection of connecting lead to the main
PCB
X15 Internal connection, KM-BUS
X18 Connection for Modbus 1: Viessmann applian-
ces
If other Viessmann appliances are to be con-
nected, plug in the Modbus distributor (acces-
sory).
■ Set the required parameters during commissioning;
see from page 57.
Connections, see separate "Connection and wiring
■
diagram" sheet 40 to sheet 192.
46
(cont.)
X20
X31
F20 F12 F4
F21 F13 F27
F14 F7 F8
F16 F11 F6
1
F0
20
X24
aVG
X20 Programming unit connection
X24 Slot for LON communication module
X25 / :
Terminals for internal sensors and components
:
Connections for connecting cable (LV) to the
heat pump control panel or wiring chamber
X31 Slot for coding card
KM BUS
aVG
Connection, PWM signal, primary pump
a:DA
Connection, PWM signal, secondary pump
a:DB
Connection, PWM signal, cylinder primary
a:DC
pump
Terminal Modbus 2
sVA
Note
Plug F11: Nothing should be connected to plug F11
■
on site.
■ Flow temperature sensor for heating circuit with
mixer (M3): The flow temperature sensor for one
heating circuit with mixer (M3/HC3) is connected to
the mixer extension kit (accessories).