Dimplex VWU 32E Montage- Und Gebrauchsanweisung Seite 17

ATTENTION!
If a dual differential pressureless manifold is to be used, the return sensor
must be wired according to the following instructions.
Bild 1: WPM EconPlus circuit diagram with "A-R2" link cable between X3/B2 and X3/1 (must only be observed when a dual differential pressureless manifold is used
with return sensor R2.1).
If the heating circuit contains a dual differential pressureless
manifold, the "A-R2" link cable on the WPM EconPlus must be
removed from between X3/B2 and X3/1 and re-inserted between
terminals X3/1 and X3/2. In this case, the return temperature
regulation is measured by temperature sensor R2.1, which is
located in an immersion sleeve in the dual differential
pressureless manifold. R2.1 must be connected to terminal X3/
R2.1. 
Bild 1: shows the corresponding circuit diagram, in which the
relevant link cables are depicted.
452163.66.60 FD 9403
VWU 32E - VWU 50E
EN-7