Viessmann VITOCAL 242-G Installation And Service Instructions Manual page 49

System version 4
qW Heating circuit pump, direct heat-
ing circuit
qE DHW circulation pump
qR Natural cooling extension kit
qT Central fault message (230 V)
qZ Power-OFF
qI KM BUS: Vitotrol 200 remote con-
trol (with room temperature sen-
sor), see also page 67
qO Room temperature sensor (if no
remote control is installed), see
also page 67
Connections to control module X80, 400 V
A Front of control module (with type
plate)
B Compressor power supply
C Internal connection to control
panel
D Primary pump connection (230 V)
E Compressor safety chain connec-
tion
F Phase monitor
G Phase monitor connection
H Compressor contactor
K Compressor or full wave soft star-
ter connection
(cont.)
wP KM BUS: Cooling circuit exten-
wQ Outside temperature sensor
wW Heating water buffer cylinder tem-
wR Collector temperature sensor
tP KM BUS: Extension kit for one
L Primary temperature sensor (for
M Heat pump module
N Direct connection only with
O Connection required as of
P Connection required as of
R Full wave soft starter (as of
Preparing for installation
sion kit
perature sensor
(only with Vitocal 242)
heating circuit with mixer
control purposes)
BWT 106
BWT 108
BWT 108
BWT 108)
49