Viessmann Vitocal 300 AWO-M-AC 301.A, Installation And Service Instructions Manual

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92
Terminals Function Explanation
X3.12
X3.13
or at exter-
nal exten-
sion H1 Signal "External demand"
(external starting of com-
pressor and pumps, mixer
in control operation or
OPEN, changeover of
operating mode of several
system components) Requires zero volt N/O contact:
■ Closed: Demand
■ Open: No demand
■ Breaking capacity 230 V, 2 mA
Note
■ These or other external functions, such
as swimming pool water heating, cas-
cade or external set value default can
alternatively be connected via external
extension H1.
Installation instructions "External
extension H1"
■ If a swimming pool water heating facility
is connected to external extension H1,
no other external function can be con-
nected to external extension H1.
X3.17
X3.18 Fuse F1 6.3A (slow)
X5/X7 Control cable 230 V~ Terminals for connecting cable to the con-
trol panel
Controller and sensor PCB
Note
■ Plug F11:
Nothing should be connected to plug
F11 on site.
■ Flow temperature sensor for heat-
ing circuit with mixer (M3):
The flow temperature sensor for one
heating circuit with mixer (M3) is con-
nected to the extension kit for heating
circuit with mixer (accessory).
Installation sequence
Electrical connections in the heat pump control…
(cont.)
5692 875 GB