Dim Connection To Boiler Via Zone; Signal State - Immergas DIM 2 ZONE ERP Instructions And Warnings

3.6 DIM CONNECTION TO BOILER VIA
ZONE SIGNAL STATE.
IMMERGAS MODELS WITH ZONE SIGNAL STATE OUTLET
ZONES CONTROL UNIT DIM V2
External probe
(optional)
CONNECTION TO GENERAL BOILERS
ZONES CONTROL UNIT DIM V2
External probe
(optional)
N.B.: in this connection mode, when the boiler
must be disconnected from the supply voltage,
it is also necessary to power off the manifold.
Terminal 21 allows you to activate the analogue dialogue with a strict exchange of information
between boiler and DIM:
- The DIM receives the zone signal state from the boiler;
- The boiler receives the central heating operation request from the DIM.
- The DIM must be connected to its own external probe (if necessary);
- The DIM low-temperature zone flow temperature must be regulated by its trimmer.
Eliminate the jumper on terminal board X15 of
the integrated P.C.B.
INTEGRATED P.C.B.
External probe
(optional)
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).
The contact is closed with active request.
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.
The DIM must be connected to its own external probe (if necessary).
The DIM Low-Temperature zone flow temperature must be regulated by its trimmer.
21
Power supply
230 Vac
50 Hz
3-6
3-7