Immergas DIM 2 CONE ERP, Instructions And Recommendations, Page: 39 / 48

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37
MZ1 MZ2 MZ3 RZ1 RZ2 RZ3
MG
MG RG
MZ1 RZ2 MZ3 RZ1 RZ3 RZ2
MG RG
RG
S20-1.3 S20-1.1 S20-2.3 S20-2.1 S20-2.2
50Hz
230 Vac
50Hz
230 Vac
50Hz
230 Vac
1
2
2
3
5
3
4
6 7 8 9 10
INS
TALLER
US
ER
MAINTEN
AN
CE
TECHNI
CI
AN
TECHNI
CAL
D
AT
A
Example of hydraulic diagram for connection in series of 2 DIM ERP.
Key:
S20-1.1 - Zone 1 room thermostat 1st DIM ERP
S20-1.3 - Zone 3 room thermostat 1st DIM ERP
S20-2.1 - Zone 1 room thermostat 2nd DIM ERP
S20-2.2 - Zone 2 room thermostat 2nd DIM ERP
S20-2.3 - Zone 3 room thermostat 2nd DIM ERP
RZ1 - Direct zone 1 return
RZ3 - Direct zone 3 return (mixed A2BT)
RZ2 - Direct zone 2 return (mixed A2BT)
MZ2 - Direct zone 2 flow (mixed A2BT)
MZ3 - Direct zone 3 flow (mixed A2BT)
MZ1 - Direct zone 1 flow
1 - Boiler
2 - External probe (optional)
3 - DIM ERP zones control unit
4 - 1
st
DIM ERP 3 zone
5 - 2
nd
DIM A-2BT ERP
6 - First DIM ERP zone 3
7 - First DIM ERP zone 1
8 - 2
nd
DIM ERP Zone 2
9 - 2
nd
DIM ERP Zone 3
10 - 2
nd
DIM ERP Zone 1
3.16 DESCRIPTION OF MAIN FUNCTIONS.
Three-way valves/anti-block pumps.
The device is supplied with a function that makes the pumps start
(according to the model installed) at least 1 once every 24 hours
in order to reduce the risk of pump blocking due to prolonged
inactivity. In the case of the H-LT and H-2LT versions, the same
function also acts on the mixing valve in order to prevent and
avoid the risk of blocking due to prolonged inactivity.
Post-circulation.
System post-circulation can be performed, controlled by the boil-
er, in the system zone selected as the main zone (see installation
layout).
Summer DHW/functioning priority.
In the case of DHW or boiler functioning priority in Summer
mode, all active pumps are deactivated and any mixing valves are
closed ( only for L-HT and H-2LT versions ). Normal functioning
of the DIM ERP re-starts at the end of the DHW phase, taking
the boiler switch to the Winter position.
Mixing valve initialisation.
(Only for DIM ERP H-LT and H-2LT).
Every time that the the appliance is powered, initialisation of the
mixing valves is carried out, closing them for three minutes. This
way, synchronisation is performed between the P.C.B. and the
mixing valve. The transfer of heat energy to the Low-Temperature
zone can only take place at the end of this initialisation phase.
Anti-freeze.
(Only for DIM ERP H-LT and H-2LT).
The P.C.B. is supplied with a function that protects the Low-tem-
perature system if the system water drops below 5°C.
DIM 3 Zone ERP
Zone 1 Direct
Zone 2 Direct
Zone 3 Direct
DIM A2BT ERP
Zone 1 Diretta
Zone 2 Mixed
Zone 3 Mixed