Viessmann VITOCAL 242-G Installation And Service Instructions Manual page 20

Preparing for installation
System version 1
A Primary side interface (see from
page 18)
B Min. 500 mm (for hydraulic
separation)
1 Compact Energy Tower
5 Overflow valve
6 Diaphragm expansion vessel
heating circuit
7 Temperature limiter underfloor
heating circuit (connection see
page 68)
8 Plate-type heat exchanger
qP Underfloor heating circuit
qE DHW circulation pump
qR Natural cooling extension kit
qU KM BUS distributor
qI Vitotrol 200 remote control
qO Room temperature sensor
wP Extension kit for cooling circuit
with mixer
wQ Outside temperature sensor
wU DHW circulation extension
20
(cont.)
wI Heating circuit extension
wO Connection panel
eP Contact humidistat
eQ Circulation pump (secondary
eW Three-way diverter valve heating/
eE 2-way motorised ball valve
eR Frost stat
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
cooling circuit pump)
cooling
circuit pump)
sensor
Only in conjunction with
Vitocal 242:
solar circuit