Viessmann VITOCAL 242-G Installation And Service Instructions Manual page 29

System version 2
qO Room temperature sensor
wP Extension kit for cooling circuit
with mixer
wQ Outside temperature sensor
wW Heating water buffer cylinder tem-
perature sensor
wU DHW circulation extension
wI Heating circuit extension
wO Connection panel
eP Contact humidistat
eW Three-way diverter valve heating/
cooling
eE 2-way motorised ball valve
eR Frost stat
(cont.)
eT Circulation pump (primary cooling
rQ Cooling circuit flow temperature
rW Cooling circuit mixer motor
wE Solar collector
wR Collector temperature sensor
wT Diaphragm expansion vessel,
wZ Solar circuit extension
Preparing for installation
circuit pump)
sensor
Only in conjunction with
Vitocal 242:
solar circuit
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