Viessmann VITOTRONIC 200 Service Instructions Manual page 49

Heating circuits/cooling circuits
Overview of the heating/cooling circuits
Heating/cooling circuit
Mixer
With heating water buffer cylinder ("Enable
1
buffer cylinder/low loss header 7200" set
to "1"):
Max. 3 heating circuits, of which max. 1
■
heating/cooling circuit or 1 separate cool-
ing circuit
With a heating water/coolant buffer cylinder
2
("Enable buffer cylinder/low loss header
7200" set to "2")
Max. 3 heating/cooling circuits
■
With installation kit with mixer ("Type of as-
3
sembly kit 7044" set to "1"; Vitocal 111-S/
222-A/222-S only):
2 heating circuits, of which max. 1 heat-
■
ing/cooling circuit
Parameter
Note
If the installation kit with mixer is installed and activa-
ted, please note the following:
■ Heating circuit A1/HC1 must be connected, other-
wise heating circuit M2/HC2 cannot be supplied with
heat.
■ Set the rated output of the heating circuit pump
"Rated output heating circuit pump HC2 734A" in
accordance with the required flow rate in heating cir-
cuit M2/HC2.
■ It is not possible to operate a buffer cylinder in the
secondary circuit flow.
■ A sufficient system volume must be available in
order to provide the defrost energy. For this, either
install an overflow valve at the furthest point in the
heating circuit or a heating water buffer cylinder with
a low volume in the secondary circuit return.
Heating/cooling circuit system components
Heating/cooling circuit
Mixer
Mixer extension kit (KM-BUS)
Mixer motor
Connection to heat pump control unit, di-
■
rect control with 230 V~ signal
Connection to mixer extension kit
■
Heating circuit flow temperature sensor
Connection to heat pump control unit
■
(F12)
Connection to mixer extension kit
■
(cont.)
Controlled directly
A1/HC1
/ :
Controlled directly
A1/HC1
M2/HC2
X
—
X X
X X
X X
2xxx 3xxx
M2/HC2
X
—
— —
X
—
— —
X
—
— —
Function description
Controlled Separate
via KM-BUS cooling cir-
cuit
M3/HC3 SKK
X
—
X X
X
—
— —
4xxx 71xx
Controlled via Separate cool-
KM-BUS ing circuit
M3/HC3 SKK
X
—
X
—
— —
X
—
— —
X
—
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