2 | Power connection and wiring
12 B1820023_en | Service handbook Lambdatronic H 3200 - T4e
2.1.7 Connecting a circulating pump with valve to the core module
Different types of wiring must be implemented depending on the type of pump:
High efficiency pump with control line (PWM / 0-10V)
On high efficiency pumps with an additional wired control line, the speed control is implemented via the
additional connection for the PDM or 0-10V signal.
Pumpe 1
N
PE
L
LV
N
Netz
PE
L
AO-P1
PWM
0-10V
22 12
24 14
21 11
A2 A1
r Using the RC element, connect the relay at the "Pump 1" output
r Connect the phase (L) of the power supply to the relay and the continuous supply to the valve (this switches
the valve back into the initial position)
r Connect the neutral conductor (N) of the power supply to the pump and the valve
r Connect the protective earth conductor (PE) of the power supply to the pump
r Connect the phase (L) for switching over the valves together with the phase (L) for the pump to the switched
output of the relay
r Connect the PWM cable of the high efficiency pump to the corresponding “PWM / 0-10V” port
Ä Make sure that the cables are configured correctly (polarity) in accordance with the connection diagram of
the pump!
r In the relevant menu, set the activation of the pump to “Field pump PDM + valve” or to “Field pump 0-10V +
valve”
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