Viessmann VITOCAL 350-A, Installation And Service Instructions Manual

Page: 75 / 256

75
X9 Plug-in strip for connecting cable
(LV cable < 42 V) – heat pump con-
trol unit – control panel X14 Terminal strip with terminal X14.6
for PE connection of connecting
cable (control cable 230 V~)
Electrical connections in the heat pump control unit
Note
■ The total output of all components con-
nected directly to the heat pump con-
trol unit (e.g. pumps, valves, message
facilities, contactors) must not exceed
1000 W.
If the total output
≤
1000 W, the indi-
vidual rating of a component (e.g.
pump, valve, message facility, contac-
tor) can be greater than specified.
However, never exceed the breaking
capacity of the corresponding relay
(see page 245).
■ Route 230 V cables and LV cable sep-
arately and bundle tightly near their
terminals. This ensures that, in case of
failure, for example when detaching a
wire, the wires cannot drift into the
adjacent voltage area.
■ Strip the insulation as close to the ter-
minals as possible.
■ If two components are connected to
the same terminal, press both cores
together into a single wire ferrule.
Make all external electrical connections
as per the instructions from page 89
onwards.
Installation sequence
Electrical connections in the control panel
(cont.)
5414 828 GB
Installation