Immergas DIM 2 CONE ERP Operating instructions

ERP
MULTI-SYSTEM
DISTRIBUTION
MANIFOLD
DIM 2 ZONE ERP
DIM 3 ZONE ERP
DIM A-BT ERP
(1 direct zone and 1 mixed zone)
DIM A-2BT ERP
(1 direct zone and 2 mixed zones)
IE
Instructionsandrecommendations
Installer
User
Maintenancetechnician
*1.039170ENG*

e manufacturer declines all liability due to printing or transcription errors, reserving the right to make any modications to its
technical and commercial documents without forewarning.
Dear Customer,
Our compliments for having chosen a top-quality Immergas product, able to assure well-being and safety for a long period of time. As an Immergas customer, you can also
count on a qualied Aer-Sales Service, prepared and updated to guarantee the constant eciency of your products. Read the following pages carefully: you will be able to
draw useful suggestions regarding the correct use of the appliance. By respecting these suggestions, you will no doubt be satised with your Immergas product.
For assistance and scheduled maintenance, contact Authorised Immergas Aer-Sales centres: they have original spare parts and are specically trained directly by the
manufacturer.
General recommendations
All Immergas products are protected with suitable transport packaging.
e material must be stored in dry environments protected from bad weather.
e instruction book is an integral and essential part of the product and must also be given to the new user in the case of transfer or succession of ownership.
It must be stored with care and consulted carefully, as all of the warnings provide important safety indications for installation, use and maintenance stages.
is instructions manual provides technical information for installing Immergas appliances. As for the other issues related to the installation of appliances (e.g. safety in the
workplace, environmental protection, injury prevention), it is necessary to comply with the provisions of the regulations in force and the principles of good practice.
In compliance with the legislation in force, the systems must be designed by qualied professionals, within the dimensional limits established by the Law. Installation and
maintenance must be performed in compliance with the regulations in force, according to the manufacturer’s instructions and by professionally qualied sta, intending sta
with specic technical skills in the plant sector, as envisioned by the Law.
Improper installation or assembly of the Immergas appliance and/or components, accessories, kit and devices can cause unexpected problems for people, animals and objects.
Read the instructions provided with the product carefully to ensure proper installation.
Maintenance must be carried out by skilled technical sta. e Authorised Aer-Sales Service represents a guarantee in terms of qualications and professionalism.
e appliance must only be destined for the use for which it has been expressly declared. Any other use will be considered improper and therefore potentially dangerous.
If errors occur during installation, operation and maintenance, due to non-compliance with technical laws in force, standards or instructions contained in this book (or however
supplied by the manufacturer), the manufacturer is excluded from any contractual and extra-contractual liability for any damages and the appliance warranty is invalidated.
For further information regarding legislative and statutory provisions relative to the installation of gas heat generators, consult the Immergas site at the following web address:
www.immergas.com
e company IMMERGAS S.p.A., with registered oce in via Cisa Ligure 95 42041 Brescello (RE), whose design, manufacturing and
aer-sales assistance processes comply with the requirements of standard UNI EN ISO 9001:2015.
For further details on the product CE marking, request a copy of the Declaration of Conformity from the manufacturer, specifying the
appliance model and the language of the country.

INDEX
1 Installing the device .......................................................5
1.1 Description of the device....................................................... 5
1.2 Installation recommendations.............................................. 5
1.3 Main dimensions.................................................................... 6
1.4 Hydraulic connection. ........................................................... 7
1.5 Electrical connection. ........................................................... 7
1.6 Installation layouts. ................................................................ 8
1.7 Commissioning the device.................................................. 10
1.8 Circulation pump. ................................................................ 10
1.9 Sizing the systems................................................................. 11
1.10 Kits available on request...................................................... 11
1.11 Main components................................................................. 13
2 Use and maintenance instructions...............................15
2.1 General warnings. ................................................................ 15
2.2 Warnings for the user........................................................... 15
2.3 Cleaning the case.................................................................. 15
3 Checks and maintenance..............................................16
3.1 Schema elettrico DIM 2 zone ErP....................................... 16
3.2 Wiring diagram DIM 3 zone ErP........................................ 18
3.3 DIM A-BT ErP Wiring diagram......................................... 20
3.4 DIM A-2BT ErP Wiring diagram....................................... 22
3.5 DIM ERP connection to boiler via DIM BUS. ................. 24
3.6 DIM ERP connection to boiler via zone signal state....... 25
3.7 DIM ERP connections to ON/OFF room thermostats. .. 27
3.8 DIM ERP connection to ON-OFF room thermostats
with shared zones. ................................................................ 28
3.9 DIM ERP connections to room thermostats and
C.A.R.V2 on boilers other than Victrix Superior (2021) .. 30
3.10 DIM ERP connections to room thermostats and
C.A.R.V2 on boilers other than Victrix Superior (2021) .. 31
3.11 Victrix Superior 2021 - DIM ERP connection with
thermostats and dominus.................................................... 32
3.12 Victrix Superior 2021 - DIM ERP connection with
wireless probes and dominus.............................................. 33
3.13 Victrix Superior 2021 - DIM ERP connection with
C.A.R.V2 and wireless probes............................................... 34
3.14 Connection between 2 DIM ERP with hydraulics in
parallel.................................................................................... 35
3.15 DIM ERP connection to another DIM ERP or to
Hercules zone kit with hydraulics in series....................... 38
3.16 Description of main functions............................................ 39
3.17 Zone management P.C.B. .................................................... 40
3.18 Mixed zone ow temperature adjustment.........................41
3.19 External temperature probe (Optional). ........................... 41
3.20 Troubleshooting.................................................................... 43
4 Technical data............................................................... 44

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INSTALLER
USERMAINTENANCE TECHNICIAN
TECHNICAL DATA
1INSTALLING THE DEVICE
1.1 DESCRIPTION OF THE DEVICE.
e “DIM ERP” code (Disgiuntore Idrico Multi-impianti) identi-
es a series of kits that Immergas proposes for the management of
mixed zone central heating systems with large water capacities. In
particular, they are kits that can only be coupled with some boiler
models in the Immergas range, including an open manifold (distri-
bution manifold) and are available in four dierent congurations:
• DIM 2 zones ErP, to be used to manage systems divided into 2
zones;
• DIM 3 zones ErP, to be used to manage systems divided into 3
zones;
• DIM H-LT ErP, for the management of mixed systems with
dierentiated temperature (e.g. a zone with radiators and one
with radiant oor panels);
• DIM H-2LT ErP, for the management of mixed systems with
dierentiated temperature (e.g. a zone with radiators and two
with radiant oor panels).
IMPORTANT: the boiler models set up for coupling with the mani-
folds are Immergas boilers with P.C.B. designed for the management
of zone systems.
ese kits are characterised by the possibility to be recessed into
the wall, therefore they have no clearance.
Each zone served by the manifold is managed by a room
chrono-thermostat connected to the DIM ERP. Whenever en-
visioned by the boiler, it is possible to use an Immergas Remote
control to control one of the system zones (successively called
main zone).
N.B.: combined with the Victrix Superior range boiler (new version
2021), it is possible to use an Immergas remote control to control
only zone 1 of the system and wireless room probes to control the
temperature of the individual zones via the boiler panel.
1.2 INSTALLATION RECOMMENDATIONS.
e place of installation of the appliance and relative Immergas
accessories must have suitable features (technical and structur-
al), such as to allow for (always in safe, ecient and comfortable
conditions):
- installation (according to the provisions of the technical legis-
lation and technical regulations);
- maintenance operations (including scheduled, periodic, routine
and special maintenance);
- removal (outdoors in the place for loading and transporting the
appliances and components) as well as their eventual replacement
with appliances and/or equivalent components.
Only professionally qualied companies are authorised to install
the Immergas Multi-System Distribution Manifold. Installation
must be carried out according to regulation standards, current
legislation and in compliance with local technical regulations and
the required technical procedures. Before installing the device,
ensure that it is delivered in perfect condition; if in doubt, contact
the supplier immediately. Packing materials (staples, nails, plastic
bags, polystyrene foam, etc.) constitute a hazard and must be kept
out of the reach of children.
In the event of malfunctions, faults or incorrect operation, turn
the device o immediately and contact an authorised company
(e.g. the Authorised Technical Assistance Centre, which has spe-
cically trained sta and original spare parts). Do not attempt to
modify or repair the appliance alone. Failure to comply with the
above implies personal responsibility and invalidates the warranty.
Recess installation.
Perform the masonry work, creating an opening in the wall suit-
able to contain the device (See par. “Main dimensions”).
Insert the distribution manifold (1) into its seat, remembering to
open the four support ns (2) before insertion (Fig. 1).
Protect the side edges and the front cover during recess prepara-
tion for the device.
IMPORTANT: the hydraulic and electrical connections must
be made within the device unit; you must therefore position the
frame rst and then perform the connections.
Attention: the recessed frame is not a supporting structure and
cannot replace the piece of wall removed. It is therefore necessary
to check the correct positioning inside the wall.
Wall-hanging installation.
Fasten the frame to the wall using four expansion plugs, suitable
for the type of wall and weight of the device (not supplied) and
using the four drilled holes (see Fig. 2 pos. X).
Use the fairlead and the sheath-holder (3) supplied to limit the
inltration of water inside the frame.

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USERMAINTENANCE TECHNICIAN
TECHNICAL DATA
1.3 MAIN DIMENSIONS.
Height
(mm) Width (mm) Depth (mm)
700 450 190
Key:
RG - Generator return (G 3/4”)
MG - Generator ow (G 3/4”)
V - Electrical connection
X - Holes for DIM ERP wall-mounted fastening
DIM 2 Zone ErP
A - Zone return 1 (G 3/4”)
C - Zone return 2 (G 3/4”)
D - Zone ow 2 (G 3/4”)
F - Zone ow 1 (G 3/4”)
DIM 3 Zone ErP
A - Zone return 1 (G 3/4”)
B - Zone return 3 (G 3/4”)
C - Zone return 2 (G 3/4”)
D - Zone ow 2 (G 3/4”)
E - Zone ow 3 (G 3/4”)
F - Zone ow 1 (G 3/4”)
DIM H-LT ErP
A - High return temperature (G 3/4”)
B - Low return temperature (G 1”)
E - Low ow temperature (G 1”)
F - High ow temperature (G 3/4”)
DIM H-2LT ErP
A - High return temperature (G 3/4”)
B - Zone 1 low return temperature (G 1”)
C - Zone 2 low return temperature (G 1”)
D - Zone 1 low ow temperature (G 1”)
E - Zone 2 low ow temperature (G 1”)
F - High ow temperature (G 3/4”)

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INSTALLER
USERMAINTENANCE TECHNICIAN
TECHNICAL DATA
1.4 HYDRAULIC CONNECTION.
Attention: before making the appliance connections, clean the
heating system thoroughly (pipes, radiators, etc.) with special
pickling or de-scaling products to remove any deposits that could
compromise the correct operation of the device.
A chemical treatment of the thermal system water is required,
in compliance with the technical standards in force, in order to
protect the system and the appliance from deposits (e.g., lime
scale), slurry or other hazardous deposits.
e hydraulic connections must be made in a rational manner
using the values as per Fig. 2.
IMPORTANT: remove all the protection caps from the system
ow and return pipes before making the hydraulic connections.
e connections can be made directly using the female couplings
on the distribution manifold or by inserting system cut-o cocks
(optional). ese cocks are particularly useful for maintenance
as they allow you to drain the distribution manifold separately
without having to empty the entire system.
N.B.: e manufacturer does not supply the G1” cocks to be
installed in the low temperature zone.
Check that the expansion vessel in the boiler allows for the increase
in volume of the water resulting from its central heating without
opening the safety valve. If this is not the case, an expansion vessel
with appropriately dimensioned capacity must be installed on
the system.
e DIM ERP is set up for the insertion of the automatic “jolly”
vent valve to be mounted on the manifold. is is recommended
for better air venting inside the system.
If two DIM ERP devices are installed in parallel, two manual
valves must be tted in order to ensure the correct balance of the
hydraulic circuit.
1.5 ELECTRICAL CONNECTION.
e appliance has an IPX5D protection degree; electrical safety of
the appliance is achieved only when it is connected properly to an
ecient earthing system, as specied by current safety standards.
Attention: Immergas S.p.A. declines any responsibility for dam-
age or physical injury caused by failure to connect the boiler to
an ecient earth system or failure to comply with the reference
standards.
Moreover, ensure that the electrical installation corresponds to
the maximum absorbed power specications as shown on the
recessed unit data plate. e distribution manifold is supplied
complete with an “X” type power cable without plug. e power
supply cable must be connected to a 230V ±10% / 50Hz mains
supply respecting L-N polarity and earth connection; this
network must also have a multi-pole circuit breaker with class
III over-voltage category.
To protect from possible dispersions of DC voltage, it is necessary
to provide a type A dierential safety device.
If the power supply cable is damaged, it must be replaced by a
special cable or assembly, which are only available from the ma-
nufacturer or its Aer-sales Service. It is recommended to contact
a qualied company (e.g. the Immergas Authorised Aer-Sales
Technical Assistance Service) for replacement to avoid a hazard.
For the main power supply to the appliance, never use adapters,
multiple sockets or extension leads.
Important: it is mandatory to prepare two electrical connection
lines in order to separate the power supply of each distribution
manifold from all other low-voltage connections, according to the
standards in force regarding electrical systems. ese lines must
arrive inside the recessed frame via relevant sheaths or ducts,
passing through the fairlead and the sheath-holder supplied and
located on the upper side of the device.
• Connecting the boiler P.C.B. is connection (low-voltage)
ensures the dialogue between the boiler and the DIM ERP. Make
the connections as indicated in chapter 3, according to your
appliance model.
N.B.: the electrical connection between the electronic boards
must be made using cables with a minimum section of 0.50
mm2and a maximum section of 2.5 mm2; the length of these
connections must not exceed 15 metres.
• Room thermostat connection On - O. e room thermostats
to be connected to the DIM ERP must have a potential free con-
tact. e On-O room thermostats relative to the zones must be
connected as indicated in Fig. 25, 26, 28 or 29.
• Immergas remote control connection. Connect the remote
controls as indicated in gures 28, 29 and as specied in the
boiler instruction manual.
• External probe connection (optional). e external probe con-
trols the ow temperature of the system and varies the operation
mode and controlled zones depending on its connection (see
par. 3.19).
- e external probe must be connected to the boiler by connec-
ting the manifold and the boiler via DIM BUS (see the boiler
handbook). e temperature read by the external probe is sent
to the manifold that will adjust the ow temperature of the
various zones, according to the settings of the trimmer and
area management probe.
- e external probe must be connected to the manifold by
connecting the manifold and boiler via signal state. is way,
it will be possible to adjust the ow temperature of the mixed
zones. In these conditions, another probe must be connected
to the boiler if it is necessary to correlate the direct zone ow
with the external temperature (see Fig. 23).

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USERMAINTENANCE TECHNICIAN
TECHNICAL DATA
1.6 INSTALLATION LAYOUTS.
If you are using a Comando Amico Remoto V2 (C.A.R.V2) or Super
C.A.R. zone control remote control, it must be connected directly
to the boiler (see instructions in boiler manual).
e C.A.R.V2 or Super C.A.R. remote control will control the zone,
pre-dened as main on the manifold.
e C.A.R.V2 or Super C.A.R. remote control must be set with
on-o operation (see the relative instruction manual).
In this case, the T.A. electric connections of the zone, dened as
the main zone of the manifold, must be le free.
N.B.: combined with the Victrix Superior range boiler (new version
2021), the jumper on the RT connections of zone 1 (managed remo-
tely) must be maintained (or used for contacts of zone shutter valves).
N.B.: combined with boilers other than Victrix Superior (new ver-
sion 2021), the jumper on the RT connections of the zone dened
as main must be eliminated.
Installation layout of 2 homogeneous zones.
Key:
S20-1 - Direct zone 1 room thermostat (RT)
S20-2 - Direct zone 2 room thermostat (RT)
1 - External probe (optional)
2 - Boiler
3 - Comando Amico RemotoV2 or Super C.A.R. remote control
(optional)
RZ1 - Direct zone 1 return
RZ2 - Direct zone 2 return
MZ2 - Direct zone 2 ow
MZ1 - Direct zone 1 ow
Factory settings dene zone 1 as the main zone.
(See Fig. 14 for electrical connection and Fig. 15 for zones control unit
setting)

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USERMAINTENANCE TECHNICIAN
TECHNICAL DATA
Installation diagram with 3 zones in High Temperature or 3
zones in Low Temperature (3 direct zones).
Key:
S20-1 - Direct zone 1 room thermostat (RT)
S20-2 - Direct zone 2 room thermostat (RT)
S20-3 - Direct zone 3 room thermostat (RT)
1 - External probe (optional)
2 - Boiler
3 - Comando Amico RemotoV2 or Super C.A.R. remote control
(optional)
RZ1 - Direct zone 1 return
RZ3 - Direct zone 3 return
RZ2 - Direct zone 2 return
MZ2 - Direct zone 2 ow
MZ3 - Direct zone 3 ow
MZ1 - Direct zone 1 ow
Factory settings dene zone 1 as the main zone.
(See Fig. 16 for electrical connection and Fig. 17 for zones control unit
setting)
DIM A-BT ERP Installation diagram (1 direct zone and 1
mixed zone).
Key:
S20-1 - Direct zone 1 room thermostat (RT)
S20-2 - Mixed zone 2 room thermostat (RT)
1 - External probe (optional)
2 - Boiler
3 - Comando Amico RemotoV2 remote control (optional)
RZ1 - Direct zone 1 return
RZ2 - Mixed zone 2 return
MZ2 - Mixed zone 2 ow
MZ1 - Direct zone 1 ow
Factory settings dene zone 2 as the main zone.
(See Fig. 18 for electrical connection and Fig. 19 for zones control unit
setting)

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INSTALLER
USERMAINTENANCE TECHNICIAN
TECHNICAL DATA
DIM A-2BT ERP Installation diagram (1 direct zone and 2
mixed zones).
Key:
S20-1 - Direct zone 1 room thermostat (RT)
S20-2 - Mixed zone 2 room thermostat (RT)
S20-3 - Mixed zone 3 room thermostat (RT)
1 - External probe (optional)
2 - Boiler
3 - Comando Amico RemotoV2 remote control (optional)
RZ1 - Direct zone 1 return
RZ2 - Mixed zone 2 return
RZ3 - Mixed zone 3 return
MZ2 - Mixed zone 2 ow
MZ3 - Mixed zone 3 ow
MZ1 - Direct zone 1 ow
Factory settings dene zone 2 as the main zone.
(See Fig. 20 for electrical connection and Fig. 21 for zones control unit
setting)
1.7 COMMISSIONING THE DEVICE.
System lling. Once the device is connected, ll the system via
the boiler lling valve.
Filling is performed at low speed to ensure the release of air bub-
bles in the water via the boiler and central heating system vents
and the distribution manifold (if any).
Close radiator vent valves when only water escapes from them.
Close the lling cock when the boiler pressure gauge indicates
approx. 1.2 bar.
IMPORTANT: during these operations, start the circulation
pumps by acting on the main switch positioned on the boiler
control panel aer having activated the T.A. devices relating to
the various zones.
(Only for DIM H-LT and H-2LT ERP).
Act manually on the 3-way mixing vale using the relevant lever
on the electric actuator, keeping the same opening in order to
de-aerate the system and, if necessary, control the correct oper-
ating pressure.
Once these operations are complete, make sure that the lever on
the electric actuator is free from the manual lock position.
1.8 CIRCULATION PUMP.
e pump is ideal for the requirements of each central heating
system in a domestic and residential environment. In fact, the
pump is equipped with electronic control that allows you to set
advanced functions.
Adjustments. Turn the selector and position it on the desired
curve to adjust the circulator pump.
Program LED
P 1 lower (ΔP-V)
P 2 upper (ΔP-V) green
C 3 lower (ΔP-C) - H=3 m
C 4 upper (ΔP-C) - H=4 m orange
Min. - Max. blue
- Program P (1 lower 2 upper ) (P-V) - Proportional curve
(green LED). is allows the pressure level (head) to be pro-
portionally reduced as the system heat demand decreases (ow
rate reduction). anks to this function, the electric power con-
sumption of the circulator pump is reduced further: the energy
(power) used by the pump decreases according to the pressure
level and ow rate. With this setting, the pump guarantees
optimal performance in most heating systems, thereby being
particularly suitable in single-pipe and two-pipe installations.
Any noise originating from the water ow in the pipes, valves and
radiators is eliminated by reducing the head. Optimal conditions
for thermal comfort and acoustic well-being.
- Programs C (3 lower 4 upper ) (P-C) - Constant curve (or-
ange LED). e circulator pump maintains the pressure level
(head) constant as the system heat demand decreases (ow rate
reduction). With these settings, the circulator pump is suitable
for all oor systems where all the circuits must be balanced for
the same drop in head.

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INSTALLER
USERMAINTENANCE TECHNICIAN
TECHNICAL DATA
- MIN. - MAX. program (blue LED). e pump is distinguished
by adjustable operating curves by positioning the selector in any
point between the Min. and Max. positions, thereby satisfying
any installation requirement (from a simple single-pipe to more
modern and sophisticated systems) and always guaranteeing op-
timum performance. e precise working point can be selected
in the entire eld of use by gradually adjusting the speed.
Real-time diagnostics: a lit LED (in various colours) provides
information regarding the pump operating status, see g. 7.
Possible pump release. e pump block is indicated by a xed
red LED switching on. Turn the selector up to the MAX. position,
disconnect and reconnect the power to restart the automatic re-
lease process. e pump will then activate the procedure, which
will last for a maximum of 15 minutes and the LED will ash upon
each restart. It then turns blue for a few seconds and goes back to
red if the attempt to restart is not successful. Once the process is
complete, position the selector back on the desired curve and if
the problem has not been resolved, perform the manual release
procedure as described below.
- Disconnect the power to the boiler (the LED switches o).
- Close the system ow and return and allow the pump to cool
down.
- Empty the system circuit via the relative cock.
- Remove the motor and clean the impeller.
- Once unblocked, remount the motor.
- Fill the primary circuit; restore boiler power and set the desired
curve.
Attention: a scalding hazard is present due to high uid tem-
peratures and pressures. Scalding hazard as a result of contact.
Circulating
pump LED Description Diagnostics Remedy
LED steady on Pump
noisy
Insucient system pressure, circulating
pump in cavitation Restore correct thermal circuit pressure
Presence of foreign matter in the impeller Remove the motor and clean the impeller
Flashing white
LED
Noises during cir-
culation of the heat
transfer uid
Presence of air in the system Vent the system
LED steady on Flow rate too high Reduce rotation speed
LED o e circulator does
not work
Power outage
Ensure the boiler is correctly powered,
ensure the circulator is correctly pow-
ered
Faulty circulating pump Replace the circulating pump
Red LED Rotor seized Remove the motor and clean the impeller
Insucient power supply voltage Check boiler power supply voltage
1.9 SIZING THE SYSTEMS.
e ow temperatures to the various system zones may be re-
duced with respect to the boiler outlet temperatures, according
to the mixture of the ow and return uids inside the DIM ERP.
In the event that the DIM ERP is used to feed Low-Temperature
zones, check that the design parameters allow you to achieve a
maximum surface temperature of the radiant oor in compliance
with standard in force.
1.10 KITS AVAILABLE ON REQUEST.
• System cut-o cock kit (on request). e manifold is designed
for the installation of system interception cocks, to be placed on
the ow and return pipes of the connection assembly. is kit is
particularly useful for maintenance as it allows the DIM ERP to
be drained separately without having to empty the entire system.
• External probe kit.
• Safety thermostat kit.
e above-mentioned kits are supplied complete with instructions
for assembly and use.

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9
A
A
B
B
C
C
D
D
E
E
L
L
F
F
G
G
H
H
I
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INSTALLER
USERMAINTENANCE TECHNICIAN
TECHNICAL DATA
Prevalenza disponibile all’impianto a velocità ssa.
Key:
A = Available head
B = Power absorbed by the circulator pump
(dotted area)
Circulator pump absorbed power (W)Circulator pump absorbed power (W)
Flow rate (l/h)
Flow rate (l/h)
Head (kPa)Head (kPa)
Direct zone
Direct zone
Mixed zone
Mixed zone
Key:
C = Head available to the system with circulator pump
selector in position C4 (standard setting)
D = Head available to the system with circulator pump
selector in position C3
E = Head available to the system with circulator pump
selector in position P2
F = Head available to the system with circulator pump
selector in position P1
G = Circulator pump power with selector in position
C4 (standard setting)
H = Circulator pump power with selector in position
C3
I = Circulator pump power with selector in position
P2
L = Circulator pump power with selector in position
P1
Prevalenza disponibile all’impianto a velocità proporzionale o costante.
Circulator pump absorbed power (W)Circulator pump absorbed power (W)
Flow rate (l/h)
Flow rate (l/h)
Head (kPa)Head (kPa)
MAX
MAX
MIN
MIN

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INSTALLER
USERMAINTENANCE TECHNICIAN
TECHNICAL DATA
1.11 MAIN COMPONENTS.
DIM ERP 2 Zone
DIM ERP 3 Zone
Key:
1 - Hydraulic manifold
2 - Drain tting
3 - Zone 1 pump
4 - Electrical connection box
5 - Zone 1 ‘’Europa’’ one-way valve
6 - Zone 2 pump
7 - Zone 2 ‘’Europa’’ one-way valve
RZ1 - Direct zone 1 return
RZ2 - Direct zone 2 return
MZ2 - Direct zone 2 ow
MZ1 - Direct zone 1 ow
Key:
1 - Hydraulic manifold
2 - Drain tting
3 - Zone 1 pump
4 - Electrical connection box
5 - Zone 1 ‘’Europa’’ one-way valve
6 - Zone 2 pump
7 - Zone 3 pump
8 - Zone 3 ‘’Europa’’ one-way valve
9 - Zone 2 ‘’Europa’’ one-way valve
RZ1 - Direct zone 1 return
RZ3 - Direct zone 3 return
RZ2 - Direct zone 2 return
MZ2 - Direct zone 2 ow
MZ3 - Direct zone 3 ow
MZ1 - Direct zone 1 ow

14
DIM A-BT ERP 12
13
INSTALLER
USERMAINTENANCE TECHNICIAN
TECHNICAL DATA
Key:
1 - Flow temperature thermometers
2 - Hydraulic manifold
3 - Drain tting
4 - Zone 1 pump
5 - Zone 2 ow probe
6 - Zone 2 safety thermostat
7 - Electrical connection box
8 - Zone 2 3-way mixing valve
9 - Zone 2 mixing valve motor
10 - Zone 2 pump
11 - Zone 1 “Europa” one-way valve
RZ1 - Direct zone 1 return
RZ2 - Mixed zone 2 return
MZ2 - Mixed zone 2 ow
MZ1 - Direct zone 1 ow
Key:
1 - Flow temperature thermometers
2 - Hydraulic manifold
3 - Drain tting
4 - High-temperature zone pump
5 - Zone 2 low-temperature safety thermostat
6 - Zone 2 low-temperature ow probe
7 - Electrical connection box
8 - Low-temperature zone 1 3-way mixing valve
9 - Low-temperature zone 1 mixing valve motor
10 - Low-temperature zone 2 3-way mixing valve
11 - Low-temperature zone 1 safety thermostat
12 - Low-temperature zone 1 ow probe
13 - Low-temperature zone 1 circulator
14 - High-temperature zone “Europa” one-way valve
15 - Low-temperature zone 2 mixing valve motor
16 - Low-temperature zone 2 circulator
RZ1 - Direct zone 1 return
RZ2 - Mixed zone 2 return
RZ3 - Mixed zone 3 return
MZ2 - Mixed zone 2 ow
MZ3 - Mixed zone 3 ow
MZ1 - Direct zone 1 ow
DIM 1 zone A-2BT ERP

15
INSTALLER
USERMAINTENANCE TECHNICIAN
TECHNICAL DATA
2USE AND MAINTENANCE INSTRUC TIONS
2.1 GENERAL WARNINGS.
If the device must be deactivated temporarily, act directly on the
main switch to power o the system and work safely
• Attention: using any components that use electrical power
requires the observation of some fundamental rules:
- do not touch the device with wet or moist parts of the body; do
not touch when barefoot.
- if the device is wall-mounted: do not pull the electric cables, do
not leave the device exposed to the elements (rain, sun, etc.);
- the device power cable must not be replaced by the user;
- in the event of damage to the cable, switch the device o and
exclusively contact professionally qualied sta for replacement;
- if the device is not going to be used for a certain period, discon-
nect the main power switch.
2.2 WARNINGS FOR THE USER.
is device does not require any regulation or control by the user;
the opening of the device front lid is therefore prohibited.
e only operation that the user must perform is that of periodi-
cally checking the water pressure of the system in the boiler. e
boiler pressure gauge should read a value of between 1 and 1.2 bar.
If the pressure is below 1 bar (with the circuit cool), restore nor-
mal pressure via the lling valve located in the boiler (see boiler
instruction book).
N.B.: close the valve aer the operation.
If pressure values reach around 3 bar, the boiler safety valve may
be activated.
In this case, remove water from a radiator air vent valve until a
pressure of 1 bar is achieved, or ask for assistance from profes-
sionally qualied personnel.
In the event of frequent pressure drops, contact qualied sta for
assistance to eliminate any system leakage.
At the end of its service life, the appliance must not be disposed of
like normal household waste nor abandoned in the environment,
but must be removed by a professionally authorised company.
Contact the manufacturer for disposal instructions.
2.3 CLEANING THE CASE.
Use damp cloths and neutral detergent to clean the manifold
casing. Never use abrasive or powder detergents.

16
14
1
2
9
3
4
8
7
65
BR
BR
BR
BR
BL
BL
GY
Y/G
Y/G
BK
BK R
INSTALLER
USERMAINTENANCE TECHNICIAN
TECHNICAL DATA
3CHECKS AND MAINTENANCE
- Check connection to a 230V-50Hz power mains via an omni-po-
lar disconnector (magnetothermal circuit breaker), correct L-N
polarity and the earthing connection;
- check that the magnetothermal circuit breaker is working prop-
erly;
- make sure the central heating system is lled with water and that
the pressure gauge indicates a pressure of 1-1.2 bar;
- make sure that the air valve cap (if present) is open and that the
system is appropriately de-aerated;
3.1 SCHEMA ELETTRICO DIM 2 ZONE ERP.
Key:
B4 - External probe (optional)
M10-1- Zone 1 pump
M10-2- Zone 2 pump
R12 - Zone 2 low-temperature ow regulation
trimmer
R13 - Zone 3 low-temperature ow regulation
trimmer
S25 - Board setting selector
S26 - Board setting selector
S27 - Board setting selector
T2 - Zone control unit low-voltage feeder
Z1 - Anti-jamming lter
1 - 230 Vac 50 Hz power supply
2 - Central heating request outlet to boiler
or other DIM ERP
3 - Central heating request inlet from other
DIM ERP
4 - Zones signal state outlet for other DIM ERP
5 - Connection to DIM ERP safety thermostat
6 - Connections to ON/OFF room thermostats
7 - Zones signal state inlet from boiler or
other DIM ERP
8 - DIM BUS connection to boiler
9 - Zones control unit
BK - Black
BR - Brown
BL - Blue
GY - Grey
R - Red
G/Y - Yellow/Green
Zone Type
Zone 1 Direct
Zone 2 Direct
- check the sealing eciency of water circuits;
- check the correlation between the electric and hydraulic con-
nections;
- (only for DIM H-LT or H-2LT ERP) with request for heat in the
mixed zones, check the correct opening and closure of the mixing
valve, opening the latter to check the system safety thermostat
intervention (the boiler ow temperature must be set over 60
°C).
Even if just one single safety check provides a negative result, do
not commission the system.

17
15
INSTALLER
USERMAINTENANCE TECHNICIAN
TECHNICAL DATA
If the boiler requires it, the BUS connection can be made to the
terminals as DIM BUS or 44-41, or 40-41 (see boiler instruction
booklet).
On connecting the zone control Room ermostats, it is neces-
sary to eliminate the jumpers present in the zones control unit
on terminal board X9.
On connecting the DIM ERP safety thermostat, it is necessary to
eliminate the jumper on X7.
Any C.A.R.V2 or Super C.A.R. zone control must be connected
directly to the boiler.
N.B.: for boilers other than Victrix Superior (new version 2021), it is
possible to control Zone 1 or Zone 2 as the main zone, indierently.
By default (switch 4 on OFF) on the manifold set as Master will be
controlled as the main Zone 1.
For Victrix Superior range boilers (new version 2021), regardless
of how switch 4 is set (ON or OFF), Zone 1 will still be controlled
as the main one.
In the event that two or more zones are used, the C.A.R.V2 o Super
C.A.R. must be set with on-o operation (see instructions in the
relative booklet).
e electrical connections of the RT inlets of the zones control
unit relating to the zone controlled by the remote device, must be
le free if the DIM ERP is connected to boilers other than Victrix
Superior (new version 2021).
N.B.: combined with the Victrix Superior range boiler (new version
2021), the jumper of zone 1 (if remotely present) must be maintained
(or used for contacts of zone shutter valves).
ZONE CONTROL UNIT SETTINGS
N°
SWITCH OFF ON
1Homogeneous zone control Mixed zone control
2N° 1 mixed zone (Z2) N° 2 mixed zones (Z2 and Z3)
3MASTER board SLAVE board
4Main zone = zone 1 Main zone = zone 2
5 Super C.A.R.: main zone ow control Super C.A.R.: system ow control
6Mixed zones max. temperature = 50°C Mixed zones max. temperature = 75°C
7Normal functioning Not used
8Not used Not used
9Mixed zones minimum temperature = 25°C Mixed zones minimum temperature = 35°C
10 Not used Not used
11 Not used Not used
12 Not used Not used
N.B.: the default settings are highlighted in bold.

18
16
2
8
3
4
BR
BR
BR
BR
BR
BL BL BL BL
BL
BK
BK R
GY
Y/G
1
5 6 8
7
INSTALLER
USERMAINTENANCE TECHNICIAN
TECHNICAL DATA
3.2 WIRING DIAGRAM DIM 3 ZONE ERP.
Key:
B4 - External probe (optional)
M10-1- Zone 1 pump
M10-2- Zone 2 pump
M10-3- Zone 3 circulator
R12 - Zone 2 low-temperature ow regulation
trimmer
R13 - Zone 3 low-temperature ow regulation
trimmer
S25 - Board setting selector
S26 - Board setting selector
S27 - Board setting selector
T2 - Zone control unit low-voltage feeder
Z1 - Anti-jamming lter
1 - 230 Vac 50 Hz power supply
2 - Central heating request outlet to boiler
or other DIM ERP
3 - Central heating request inlet from other
DIM ERP
4 - Zones signal state outlet for other DIM
ERP
5 - Connection to DIM ERP safety thermostat
6 - Connections to ON/OFFroomthermostats
7 - Zones signal state inlet from boiler or
other DIM ERP
8 - DIM BUS connection to boiler
9 - Zones control unit
BK - Black
BR - Brown
BL - Blue
GY - Grey
R - Red
Y/G - Yellow/Green
Zone Type
Zone 1 Direct
Zone 2 Direct
Zone 3 Direct

19
17
INSTALLER
USERMAINTENANCE TECHNICIAN
TECHNICAL DATA
If the boiler requires it, the BUS connection can be made to the
terminals as DIM BUS or 44-41, or 40-41 (see boiler instruction
booklet).
On connecting the zone control Room ermostats, it is neces-
sary to eliminate the jumpers present in the zones control unit
on terminal board X9.
On connecting the DIM ERP safety thermostat, it is necessary to
eliminate the jumper on X7.
Any C.A.R.V2 or Super C.A.R. zone control must be connected
directly to the boiler.
N.B.: for boilers other than Victrix Superior (new version 2021), it is
possible to control Zone 1 or Zone 2 as the main zone, indierently.
By default (switch 4 on OFF) on the manifold set as Master will be
controlled as the main Zone 1.
For Victrix Superior range boilers (new version 2021), regardless
of how switch 4 is set (ON or OFF), Zone 1 will still be controlled
as the main one.
In the event that two or more zones are used, the C.A.R.V2 o Super
C.A.R. must be set with on-o operation (see instructions in the
relative booklet).
e electrical connections of the RT inlets of the zones control
unit relating to the zone controlled by the remote device, must be
le free if the DIM ERP is connected to boilers other than Victrix
Superior (new version 2021).
N.B.: combined with the Victrix Superior range boiler (new version
2021), the jumper of zone 1 (if remotely present) must be maintained
(or used for contacts of zone shutter valves).
ZONE CONTROL UNIT SETTINGS
N°
SWITCH OFF ON
1Homogeneous zone control Mixed zone control
2N° 1 mixed zone (Z2) N° 2 mixed zones (Z2 and Z3)
3MASTER board SLAVE board
4Main zone = zone 1 Main zone = zone 2
5 Super C.A.R.: main zone ow control Super C.A.R.: system ow control
6Mixed zones max. temperature = 50°C Mixed zones max. temperature = 75°C
7Normal functioning Not used
8Not used Not used
9Mixed zones minimum temperature = 25°C Mixed zones minimum temperature = 35°C
10 Not used Not used
11 Not used Not used
12 Not used Not used
N.B.: the default settings are highlighted in bold.

20
18
1
2
3
5 6
7
8
9
4
BR
BR
BR
OR R
BR
BL BL BL BL
BL
BL R R R R
GY
Y/G
BK
INSTALLER
USERMAINTENANCE TECHNICIAN
TECHNICAL DATA
3.3 DIM ABT ERP WIRING DIAGRAM.
Key:
B3-2 - Zone 2 low-temperature ow probe
B4 - External probe (optional)
E7-2 - Zone 2 low-temperature safety thermo-
stat
M10-1- Zone 1 pump
M10-2- Zone 2 pump
M31-2- Mixing valve zone 2
R12 - Zone 2 low-temperature ow regulation
trimmer
R13 - Zone 3 low-temperature ow regulation
trimmer
S25 - Board setting selector
S26 - Board setting selector
S27 - Board setting selector
S28 - P.C.B. setting selector
T2 - Zone control unit low-voltage feeder
Z1 - Anti-jamming lter
1 - 230 Vac 50 Hz power supply
2 - Central heating request outlet to boiler
or other DIM ERP
3 - Central heating request inlet from other
DIM ERP
4 - Zones signal state outlet for other DIM
ERP
5 - Connection to DIM ERP safety thermostat
6 - Connections to ON/OFFroomthermostats
7 - Zones signal state inlet from boiler or
other DIM ERP
8 - DIM BUS connection to boiler
9 - Zones control unit
BK - Black
BR - Brown
BL - Blue
GY - Grey
R - Red
OR - Orange
Y/G - Yellow/Green
Zone Type
Zone 1 Direct
Zone 2 Mixed