Immergas DIM 2 ZONE ERP - DIM Connection to Boiler Via Zone; Signal State

21
3-6
3-7
INSTALLERUSER
MAINTENANCE TECHNICIAN
3.6 DIM CONNECTION TO BOILER VIA
ZONE SIGNAL STATE.
Terminal 21 allows you to activate the analogue dialogue with a strict exchange of information
between boiler and DIM:
- e DIM receives the zone signal state from the boiler;
- e boiler receives the central heating operation request from the DIM.
- e DIM must be connected to its own external probe (if necessary);
- e DIM low-temperature zone ow temperature must be regulated by its trimmer.
IMMERGAS MODELS WITH ZONE SIGNAL STATE OUTLET
CONNECTION TO GENERAL BOILERS
If the DIM is connected to the boiler without the zone signal state or the IMG BUS dialogue, the
zone pumps are controlled only by the respective room thermostats. In this case, the pumps cannot
be controlled from the boiler, activating them for example for post-circulations or deactivating
them by selecting the “summer” function on the boiler.
e DIM must be connected to its own external probe (if necessary).
e DIM Low-Temperature zone ow temperature must be regulated by its trimmer.
N.B.: in this connection mode, when the boiler
must be disconnected from the supply voltage,
it is also necessary to power o the manifold.
External probe
(optional)
External probe
(optional)
Power supply
230 Vac
50 Hz
ZONES CONTROL UNIT DIM V2
Brown
Blue
INTEGRATED P.C.B.
Eliminate the jumper on terminal board X15 of
the integrated P.C.B.
ZONES CONTROL UNIT DIM V2
Boiler ignition request:
to terminals 15 and 16 of zones control unit
the potential free contact of the boiler ignition control relay
(230 Vac, 0.5 A max).
e contact is closed with active request.
Y./G.
External probe
(optional)