7 Electrical connection
X2 - Power supply for electric heating ele-
ment
–
Electric heating element with 3, 6 or max. 9 kW
power can be connected, 400 V AC, terminals
3/N/PE
–
Recommended fuse B16 A
–
Wiring diagram for electric heating element
–
≥2.5 mm² up to 20 m cable length, 4 mm² with
cable length over 20 m (use flexible cable).
X3 - Control power supply for heat pump,
control and primary circuit circulation pump
–
230 V, 10 A, terminals 1/N/PE
–
Recommended fuse B10 A
–
Cable cross-section ≥1.5 mm²
X5 - Bus cable (RS485)
–
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
X6 - Analogue input
–
0 to 10 V input, for heat pump output specification
Installation manual
vampair
23
