SOLARFOCUS Vampair, Руководство по установке

Страница: 34 / 52

8 Electrical connection
n Use a bus cable with this specification:
–
Cable length up to 100 m: 2x2x0.22 mm²
Cable length 100 m to 200 m: 2X2x0.34 mm²
(e.g. Lapp Unitronic Bus Can, No. 2170263)
–
AWG22, STP (=Shielded Twisted Pair)
–
Nominal resistance: 120 Ohm
–
Line capacitance per metre: < 60 pF/m
–
Loop resistance: < 160 Ohm/km
n Connect the shield of the bus cable to the ground
(GND
⏊
) of each electronic module (see the
images in the following chapter Bus terminating
resistor ).
n If there are several bus participants, the following
applies: The bus wiring must run from one bus-
participant to the next. The order of the par-
ticipants does not matter.
Abb. 2-43: Bus topology
8.7.3 Bus terminating resistor
–
CAN (Controller Area Network) is a 2-wire bus
system. The bus must be equipped at each end
with a 120Ω terminating resistor (to avoid reflec-
tions).
–
Two connections for the CAN bus - CAN-IN and
CAN-OUT - are located on the electronic module.
The terminating resistor is pre-installed to CAN-
OUT at the factory.
–
If only one electronic module is connected to the
heat pump, the terminating resistor for this must
be left on the
CAN-OUT plug. If several modules
are connected, then the terminating resistor
may only be installed on the last module in
the chain
(the terminating resistor must be
removed from the remaining modules). See the
following image(s).
Heat pump vamp
air
A 120 Ohm resistor is permanently installed in the display.
8.7.4 Connect the primary circuit circulation
pump
►
Connect pump to the electronic module D1
Wilo-Para (K 08, K 10)
Wire Electronic module
Power cable
L o1 – L
N o1 - neutral conductor N
PE
o1 – protective earth conductor
PE
Control
cable
blue OUT1 - ground ⏊
brown OUT1 - O
black OUT1 - I
Wilo-Stratos PARA (K 12, K 15)
Wire Electronic module
Power cable
L o1 – L
N o1 - neutral conductor N
PE
o1 - protective earth conductor
PE
Control
cable
brown
OUT1 - ground
⏊
white OUT1 - O
34 Installation manual vampair