Viessmann Vitocal 300-G BW, Installation And Service Instructions Manual

Page: 174 / 216

174
Function Explanation Connection
Control of the instantane-
ous heating water heater
control (stage 2) ■ Install control module (accessory)
■ P=10 W 2X7.5
Control of the AC-Box or the
circulation pump of the sep-
arate cooling circuit ■ This pump is started in parallel if cool-
ing takes place with the AC-Box and
heating water buffer cylinder.
■ Contactor relay required on site
■ U=230 V
■ P=10 W
2X7.6
Control of the mixer motor
for the external heat source,
signal OPEN ■ U=230 V 2X7.7
Control of the mixer motor
for the external heat source,
signal CLOSE ■ U=230 V 2X7.8
Circulation pump, direct
heating circuit A1 ■ This pump is installed in addition to
the secondary pump if a heating water
buffer cylinder is installed.
■ P
max
=100 W
■ Observe the information regarding
the total current drawn (from the
table)!
2X7.9
Circulation pump for cylin-
der heating ■ In systems with cylinder primary sys-
tem: Install pump between the heat
pump and the additional heat
exchanger.
■ P
max
=130 W
■ Observe the information regarding
the total current drawn (from the
table)!
■ U=230 V
■ If no cylinder primary system is instal-
led: Connect pump here
2X7.10
Connection and wiring diagrams
PCB 2: Function components 230 V
(cont.)
5368 522 UAE