Viessmann VITOCAL 242-G Installation And Service Instructions Manual page 35

System version 2
Information regarding other connections
The primary pump, the secondary pump, the instantaneous heating water hea-
ter and the central heating/DHW three-way diverter valve have already been
connected in the factory.
Components to be connected
Connect capacitor to full wave soft starter
Only with natural cooling:
Connect the required components to extension kit wP
and natural cooling qR extension kit
Only when using an underfloor heating system:
Connect temperature limiter
Equipment required for system version 2
Pos. Description
1 Compact Energy Tower
6 Diaphragm expansion vessel for the heating circuit
7 Temperature limiter (only required for the underfloor heat-
ing circuit)
9 Heating water buffer cylinder
qP Underfloor heating circuit
qW Heating circuit pump, direct heating circuit
qU KM BUS distributor
qI Vitotrol 200 remote control
qO Room temperature sensor
wW Cylinder temperature sensor for capturing the tempera-
ture inside the heating water buffer cylinder (top)
wI Heating circuit extension
wO Connection panel
DHW circulation option
qE DHW circulation pump
wU DHW circulation extension
Option solar heating circuit (only with Vitocal 242)
wE Solar collectors
wR Collector temperature sensor
wT Diaphragm expansion vessel for the solar circuit
wZ Solar circuit extension
Option "Natural cooling" function
8 Vitotrans 100, plate-type heat exchanger
(cont.)
Preparing for installation
Connection descrip-
tion
see page 89
See separate installa-
tion instructions
See separate installa-
tion instructions
Number
1
1
1
1
1
1
1
1
1
1
1
1
1
1
as required
1
1
1
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