Viessmann VITOCAL 300-A Installation And Service Instructions Manual page 27

External heat pump type AW-O-M
KG conduit K should be routed
&
with a slope towards the heat pump
and may need a condensate drain.
Ensure on-site wall duct G is
&
moisture and water-proof.
Secondary flow temperature sensor T
A secondary flow temperature
sensor T must be installed, indepen-
dent of whether an instantaneous
heating water heater N (accessory)
is integrated.
Connection in the control unit to
PCB 3 (sensor PCB, see page 70).
Note
If necessary, the connecting cable
provided (length approx. 2 m) can be
extended on site.
Preparing for installation
(cont.)
& Observe the permissible bending
radius of KG conduit K; never kink
the KG conduit.
Seal the apertures of KG conduit K
&
so that animals cannot enter the
building.
Note
The terminal markings on the PCBs
(e.g. X1.2) are preceded by the num-
bers 1 to 3 (e.g. 3X1.2). These num-
bers are allocated to the 3 PCBs.
3X1.2 corresponds to terminal X1.2
(terminal 2 of terminal strip X1) on
PCB 3.
27