Immergas DIM 2 ZONE ErP Product manual

ERP
MULTI-SYSTEM
DISTRIBUTION
MANIFOLD
DIM 2 ZONE ERP
DIM 3 ZONE ERP
DIM H-LT ERP (1 high-
temperature area 1 low-
temperature zone)
DIM H-2LT ERP (1 high-
temperature area 2 low-
temperature zones)
IE
Instructions and warnings
*1.039170ENG*

Immergas S.p.A. declines all liability due to printing or transcription errors, reserving the right to make any modications to its technical and commercial
documents without prior notice.
Mauro Guareschi
Research & Development Director
Signature:
CE DECLARATION OF CONFORMITY
(according to ISO/IEC 17050-1)
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 9001:2008,
DECLARES that:
e multi-system hydraulic manifolds DIM 2 ZONE ERP, DIM 3 ZONE ERP, DIM H-2LT ERP, DIM H-2LT ERP comply with the following European
Directives and Delegated European regulations:
“Eco-design” Directive 2009/125/EC, “Energy labelling” Directive 2010/30/EC, EU Regulation 811/2013, EU Regulation 813/2013, “Electromagnetic
Compatibility” Directive 2004/108/EC, “Eciency” Directive 92/42/EC and “Low-Voltage” Directive 2006/95/EC.
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

INDEX
USER pageINSTALLER page MAINTENANCE TECHNICIAN page
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.....................................10
1.10Kits available on request. .........................10
1.11Main components.....................................12
2 Use and maintenance instructions.........14
2.1 General warnings......................................14
2.2 Warnings for the user...............................14
2.3 Cleaning the case......................................14
3 Checks and maintenance.........................15
3.1 Wiring diagram DIM 2 zone ErP............16
3.2 Wiring diagram DIM 3 zone ErP............17
3.3 DIM H-LT ErP Wiring diagram.............18
3.4 DIM H-2LT ErP Wiring diagram...........19
3.5 DIM connection to boiler via IMG BUS.20
3.6 DIM connection to boiler via zone
signal state..................................................21
3.7 DIM connections to ON/OFF room
thermostats................................................22
3.8 DIM connections to ON/OFF room
thermostats and C.A.R.V2 /
SUPER C.A.R. remote controls...............24
3.9 DIM connections to ON/OFF room
thermostats and C.A.R.V2 or C.A.R
Universal remote control.........................24
3.10Connection between 2 DIM with
hydraulics in parallel. ...............................25
3.11DIM connection to another DIM
or to Hercules zone kit with
hydraulics in series. ..................................27
3.12Description of main functions................28
3.13Zone management P.C.B..........................28
3.14External temperature probe (Optional).29
3.15Troubleshooting........................................29
3.16Technical data. ..........................................30

5
1-1
2
2
1
3
INSTALLERUSER
MAINTENANCE TECHNICIAN
1INSTALLING THE DEVICE
1.1 DESCRIPTION OF THE DEVICE.
e “DIM” code (Disgiuntore Idrico Multi-im-
pianti) identies a series of kits that Immergas
proposes for the management of mixed zone
central heating systems with large water capac-
ities. In particular, they are kits that can only
be coupled with some boiler models in the
Immergas range, including an open manifold
(distribution 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 manifolds 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. Whenever envisioned by the boiler, it is
possible to use an Immergas Remote control to
control one of the system zones (successively
called main zone).
1.2 INSTALLATION
RECOMMENDATIONS.
e place of installation of the appliance and
relative Immergas accessories must have suitable
features (technical and structural), such as to al-
low for (always in safe, ecient and comfortable
conditions):
- installation (according to the provisions of the
technical legislation 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 qualified companies are
authorised to install the Immergas Multi-Sys-
tem 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 Tech-
nical Assistance Centre, which has speci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 suitable 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. 1-1).
Protect the side edges and the front cover during
recess preparation for the device.
IMPORTANT: the hydraulic and electrical con-
nections 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. 1-2 pos. X).
Use the fairlead and the sheath-holder (3)
supplied to limit the inltration of water inside
the frame.

6
1-2
INSTALLERUSER
MAINTENANCE TECHNICIAN
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 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”)

7
INSTALLERUSER
MAINTENANCE TECHNICIAN
1.4 HYDRAULIC CONNECTION.
Attention: before making the appliance connec-
tions, 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 wa-
ter 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. 1-2.
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 mainte-
nance as they allow you to drain the distribution
manifold separately without having to empty the
entire system.
N.B.: Immergas 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 open-
ing the safety valve. If this is not the case, an
expansion vessel with appropriately dimensioned
capacity must be installed on the system.
e DIM is set up for the insertion of the auto-
matic “jolly” vent valve to be mounted on the
manifold. is is recommended for better air
venting inside the system.
If two DIM 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 respon-
sibility for damage 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 com-
plete 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 volt-
age, it is necessary to provide a type A dierential
safety device.
When replacing the power supply cable, contact a
qualied company (e.g. the Immergas Authorised
Aer-Sales Technical Assistance Service).
For the main power supply to the appliance,
never use adapters, multiple sockets or exten-
sion leads.
Important: it is mandatory to prepare two elec-
trical 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 sys-
tems. ese lines must arrive inside the recessed
frame via relevant sheaths or ducts, passing
through the fairlead and the sheath-holder sup-
plied 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. 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
must have a potential free contact. e On-O
room thermostats relative to the zones must be
connected as indicated in Fig. 3-8 or 3-9.
• Immergas remote control connection.
Connect the remote controls as indicated in
gures 3-11, 3-12 and as specied in the boiler
instruction manual.
• External probe connection (optional). e
external probe controls the ow temperature of
the system and varies the operation mode and
controlled zones depending on its connection
(see par. 3.14).
- e external probe must be connected to
the boiler by connecting the manifold and
the boiler via IMG BUS. (fig. 3-5). The
temperature read by the external probe is
sent to the manifold via bus. e manifold
will then 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. 3-6).

8
1-3 1-4
INSTALLERUSER
MAINTENANCE TECHNICIAN
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
Installation layout of 2 homogeneous zones. Installation layout with 3 zones in High Temperature or 3 zones in Low
Temperature.
Key:
S20-1 - Room thermostat zone 1
S20-2 - Room thermostat zone 2
1 - External probe (optional)
2 - Boiler
3 - Comando Amico RemotoV2 or Super C.A.R. remote control
(optional)
4 - Flow to zone 1 system
5 - Flow to zone 2 system
6 - Return from zone 2 system
7 - Return from zone 1 system
Factory settings dene zone 1 as the main zone.
(See g. 3-1 for electrical connection and zone board setting)
Key:
S20-1 - Room thermostat zone 1
S20-2 - Room thermostat zone 2
S20-3 - Room thermostat zone 3
1 - External probe (optional)
2 - Boiler
3 - Comando Amico RemotoV2 or Super C.A.R. remote control
(optional)
4 - Flow to zone 1 system
5 - Flow to zone 3 system
6 - Flow to zone 2 system
7 - Return from zone 2 system
8 - Return from zone 3 system
9 - Return from zone 1 system
Factory settings dene zone 1 as the main zone.
(See g. 3-2 for electrical connection and zone board setting)
chrono-thermostat will control the pre-dened
zone on the manifold as the main zone.
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.

9
1-5 1-6
INSTALLERUSER
MAINTENANCE TECHNICIAN
DIM A-BT installation layout (1 zone in H. T. and 1 zone in L. T.).
Key:
S20-1 - Zone 1 room thermostat (high temperature)
S20-2 - Zone 2 room thermostat (low temperature)
1 - External probe (optional)
2 - Boiler
3 - Comando Amico RemotoV2 remote control (optional)
4 - High-temperature system ow
5 - Low-temperature system ow
6 - Return from Low-Temperature system
7 - High-temperature system return
Factory settings dene zone 2 as the main zone.
(See g. 3-3 for electrical connection and zone board setting)
DIM H-2LT installation layout (1 zone in H. T. and 2 zone in L. T.).
Key:
S20 - High-temperature zone room thermostat
S20-1 - Low-temperature zone 1 room thermostat
S20-2 - Low-temperature zone 2 room thermostat
1 - External probe (optional)
2 - Boiler
3 - Comando Amico RemotoV2 remote control (optional)
4 - High-temperature system ow
5 - Zone 2 Low-Temperature system ow
6 - Zone 1 Low-Temperature system ow
7 - Zone 2 Low-Temperature system return
8 - Zone 1 Low-Temperature system return
9 - High-temperature system return
Factory settings dene zone 2 as the main zone.
(See g. 3-4 for electrical connection and zone board setting)

10
1-7
INSTALLERUSER
MAINTENANCE TECHNICIAN
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 bubbles in the water via the boiler
and central heating system vents and the distri-
bution 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).
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 operating
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 residen-
tial 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) - Pro-
portional curve (green LED). This allows
the pressure level (head) to be proportionally
reduced as the system heat demand decreases
(ow rate reduction). anks to this function,
the electric power consumption of the cir-
culator pump is reduced further: the energy
(power) used by the pump decreases accord-
ing 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 (orange 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.
- 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 optimum
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. 1-7
Possible pump release. The 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
release 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 temperatures and pressures. Scalding
hazard as a result of contact.
1.9 SIZING THE SYSTEMS.
e ow temperatures to the various system
zones may be reduced with respect to the boiler
outlet temperatures, according to the mixture
of the ow and return uids inside the DIM. In
the event that the DIM is used to feed Low-Tem-
perature zones, check that the design parameters
allow you to achieve a maximum surface tem-
perature of the radiant oor in compliance with
standard UNI EN 1264.
1.10 KITS AVAILABLE ON REQUEST.
• System cut-o cock kit (on request). e man-
ifold 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 to be drained separately
without having to empty the entire system.
• External probe kit.
• Safety thermostat kit.
• By pass kit for H-LT and H-2LT. versions.
e above-mentioned kits are supplied complete
with instructions for assembly and use.
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 powered
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

11
1-8
MAX
MAX
MIN
MIN
A
A
B
B
1-9
C
C
D
D
E
E
L
L
F
F
G
G
H
H
I
I
INSTALLERUSER
MAINTENANCE TECHNICIAN
Head available to the direct zone system xed speed.
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)
High-temperature zone
High-temperature zone
Low-temperature zone
Low-temperature zone
Key:
C = Head available to the system with circula-
tor pump selector in position C4 (standard
setting)
D = Head available to the system with circula-
tor pump selector in position C3
E = Head available to the system with circula-
tor pump selector in position P2
F = Head available to the system with circula-
tor 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
Head available to the direct zone system proportional or constant speed.
Circulator pump absorbed power (W)Circulator pump absorbed power (W)
Flow rate (l/h)
Flow rate (l/h)
Head (kPa)Head (kPa)

12
1-10
1-11
INSTALLERUSER
MAINTENANCE TECHNICIAN
1.11 MAIN COMPONENTS.
DIM 2 Zone
DIM 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
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

13
1-12
1-13
INSTALLERUSER
MAINTENANCE TECHNICIAN
DIM A-BT
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
Key:
1 - Flow temperature thermometers
2 - Hydraulic manifold
3 - Drain tting
4 - High-temperature zone pump
5 - Zone 2 low-temperature safety thermo-
stat
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 thermo-
stat
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
DIM 1 zone H-2LT

14
INSTALLERUSER
MAINTENANCE TECHNICIAN
2USE AND MAINTENANCE INSTRUCTIONS
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, disconnect 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 periodically 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 normal 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 professionally 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 pow-
der detergents.

15
INSTALLERUSER
MAINTENANCE TECHNICIAN
3CHECKS AND MAINTENANCE
- Check connection to a 230V-50Hz power
mains via an omni-polar disconnector (magne-
tothermal circuit breaker), correct L-N polarity
and the earthing connection;
- check that the magnetothermal circuit breaker
is working properly;
- 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;
- check the activation of the main switch located
upstream of the appliance;
- check the sealing eciency of water circuits;
- check the correlation between the electric and
hydraulic connections;
- (only for DIM H-LT or H-2LT) 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 tem-
perature must be set over 60 °C).
Even if just one single safety check provides a
negative result, do not commission the system.

16
3-1
INSTALLERUSER
MAINTENANCE TECHNICIAN
3.1 WIRING DIAGRAM DIM 2 ZONE ERP.
e zone control C.A.R.V2 or Super C.A.R. remote
control must be connected directly to the boiler
and it will control Zone 1, which is pre-set as the
main zone on the manifold set as the Master (see
table above). In the event that two or more zones
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
are used, the chrono-thermostat must be set with
on-o operation (see instructions in the relative
booklet). The H.T. electric connections con-
trolled by the chrono-thermostat must be free.
On connecting the zone control Room ermostats, it is necessary to eliminate the jumpers present in the zone control unit on terminal board X9.
On connecting the DIM safety thermostat, it is necessary to eliminate the jumper on X7.
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 Multi-zone recognition state
8Not used Not used
9Mixed zones minimum temperature
= 25°C
Mixed zones minimum temperature
= 35°C
N.B.: the default settings are highlighted in bold.
Power supply
230 Vac 50 Hz
CENTRAL HEATING REQUEST
OUTLET TO BOILER
OR OTHER DIM
CENTRAL HEATING REQUEST INLET
FROM OTHER DIM
OFF ON
ZONES SIGNAL STATE OUTLET
FOR OTHER DIM
By connecting the zone control Room ermostats, it is necessary to
eliminate the jumpers in the zones control unit
on terminal board X9.
Connecting the DIM safety thermostat, it is necessary to
eliminate the jumper on X7.
ZONES SIGNAL STATE
INLET FROM BOILER OR
OTHER DIM
BUS IMG CONNECTION
TO BOILER
CONNECTIONS TO ON/
OFF ROOM THERMOSTATS
CONNECTION
TO DIM SAFETY
THERMOSTAT
ZONES
CONTROL UNIT
Black
Red
Blue
Blue
Blue
Brown
Brown
Brown
Y./G.
Black
Grey Blue
Brown
Y./G.

17
3-2
INSTALLERUSER
MAINTENANCE TECHNICIAN
3.2 WIRING DIAGRAM DIM 3 ZONE ERP.
e zone control C.A.R.V2 or Super C.A.R. remote
control must be connected directly to the boiler
and it will control Zone 1, which is pre-set as the
main zone on the manifold set as the Master (see
table above). In the event that two or more zones
are used, the chrono-thermostat must be set with
on-o operation (see instructions in the relative
booklet). The H.T. electric connections con-
trolled by the chrono-thermostat must be free.
Key:
B4 - External probe (optional)
M10-1 - Zone 1 pump
M10-2 - Zone 2 pump
M10-2 - 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
On connecting the zone control Room ermostats, it is necessary to eliminate the jumpers present in the zone control unit on terminal board X9.
On connecting the DIM safety thermostat, it is necessary to eliminate the jumper on X7.
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 Multi-zone recognition state
8Not used Not used
9Mixed zones minimum temperature
= 25°C
Mixed zones minimum temperature
= 35°C
N.B.: the default settings are highlighted in bold.
Black
Grey Blue
Blue
Blue Blue
Blue
Brown
Brown Brown
Brown
Brown
Power supply
230 Vac
50 Hz
ZONES
CONTROL UNIT
Black
Red
CENTRAL HEATING REQUEST INLET
FROM OTHER DIM
ZONES SIGNAL STATE OUTLET
FOR OTHER DIM
CENTRAL HEATING REQUEST
OUTLET TO BOILER
OR OTHER DIM
By connecting the zone control Room ermostats, it is necessary to
eliminate the jumpers in the zones control unit
on terminal board X9.
Connecting the DIM safety thermostat, it is necessary to
eliminate the jumper on X7.
ZONES SIGNAL STATE
INLET FROM BOILER OR
OTHER DIM
BUS IMG CONNECTION
TO BOILER
CONNECTIONS TO ON/
OFF ROOM THERMOSTATS
CONNECTION
TO DIM SAFETY
THERMOSTAT
OFF ON
Y./G.

18
3-3
INSTALLERUSER
MAINTENANCE TECHNICIAN
3.3 DIM HLT ERP WIRING DIAGRAM.
e zone control C.A.R.V2 or Super C.A.R. remote
control must be connected directly to the boiler
and it will control Zone 2, which is pre-set as the
main zone on the manifold set as the Master (see
table above). In the event that two or more zones
are used, the chrono-thermostat must be set with
on-o operation (see instructions in the relative
booklet). The H.T. electric connections con-
trolled by the chrono-thermostat must be free.
Key:
B4 - External probe (optional)
B3-2 - Zone 2 low-temperature ow
probe
E7-2 - Zone 2 low-temperature safety
thermostat
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
T2 - Zone control unit low-voltage
feeder
On connecting the zone control Room ermostats, it is necessary to eliminate the jumpers present in the zones control unit on terminal board X9.
On connecting the DIM safety thermostat, it is necessary to eliminate the jumper on X7.
ZONE CONTROL UNIT SETTINGS
N°
SWITCH OFF ON
1 Homogeneous zone control Mixed zone control
2N° 1 mixed zone (Z2) N° 2 mixed zones (Z2 and Z3)
3MASTER board SLAVE board
4 Main 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 Multi-zone recognition state
8Not used Not used
9Mixed zones minimum temperature
= 25°C
Mixed zones minimum temperature
= 35°C
N.B.: the default settings are highlighted in bold.
Black
Grey Blue
Blue
Blue
Black
Blue
Brown
Brown
Orange
Red
Brown
Brown
Power supply
230 Vac
50 Hz
ZONES
CONTROL UNIT
Black
Red
Red
Red Red
CENTRAL HEATING REQUEST INLET
FROM OTHER DIM
ZONES SIGNAL STATE OUTLET
FOR OTHER DIM
CENTRAL HEATING REQUEST
OUTLET TO BOILER
OR OTHER DIM
By connecting the zone control Room ermostats, it is necessary
to eliminate the jumpers in the zones control unit
on terminal board X9.
Connecting the DIM safety thermostat, it is necessary to
eliminate the jumper on X7.
ZONES SIGNAL STATE
INLET FROM BOILER OR
OTHER DIM
BUS IMG CONNECTION
TO BOILER
CONNECTIONS TO ON/
OFF ROOM THERMOSTATS
CONNECTION
TO DIM SAFETY
THERMOSTAT
OFF ON
Y./G.

19
3-4
INSTALLERUSER
MAINTENANCE TECHNICIAN
3.4 DIM H2LT ERP WIRING DIAGRAM.
e zone control C.A.R.V2 or Super C.A.R. remote
control must be connected directly to the boiler
and it will control Zone 2, which is pre-set as
the main zone on the manifold. e H.T. electric
connections controlled by the chrono-thermostat
must be free.
N.B.: in systems that require a high-temperature
mixed zone (by setting switch 6), it is necessary
to remove the relative safety thermostat at 55 °C
in the controlled zone and carry out a jumper on
the free terminals. Perform this operation with
the utmost care and only when it is necessary.
Key:
B4 - External probe (optional)
B3-2 - Zone 2 low-temperature ow
probe
B3-3 - Zone 3 low-temperature ow
probe
E7-2 - Zone 2 low-temperature safety
thermostat
E7-3 - Zone 3 low-temperature safety
thermostat
M10-1 - Zone 1 pump
M10-2 - Zone 2 pump
M10-2 - Zone 3 circulator
M31-2 - Mixing valve zone 2
M31-3 - Zone 3 mixing valve
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
On connecting the zone control Room ermostats, it is necessary to eliminate the jumpers present in the zones control unit on terminal board X9.
On connecting the DIM safety thermostat, it is necessary to eliminate the jumper on X7.
N.B.: the default settings are highlighted in bold.
ZONE CONTROL UNIT SETTINGS
N°
SWITCH OFF ON
1 Homogeneous zone control Mixed zone control
2 N° 1 mixed zone (Z2) N° 2 mixed zones (Z2 and Z3)
3MASTER board SLAVE board
4 Main 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 Multi-zone recognition state
8Not used Not used
9Mixed zones minimum temperature
= 25°C
Mixed zones minimum temperature
= 35°C
Black
Grey Blue
Blue
Blue
Blue
Black
Black
Blue
Brown
Brown
Brown
Orange
Orange
Red
Red
Brown
Brown
Power supply
230 Vac
50 Hz
ZONES
CONTROL UNIT
Black Black
Black
Black
Black
Red
Red
Red Red
CENTRAL HEATING REQUEST INLET
FROM OTHER DIM
ZONES SIGNAL STATE OUTLET
FOR OTHER DIM
CENTRAL HEATING REQUEST
OUTLET TO BOILER
OR OTHER DIM
By connecting the zone control Room ermostats, it is necessary
to eliminate the jumpers in the zones control unit
on terminal board X9.
Connecting the DIM safety thermostat, it is necessary to
eliminate the jumper on X7.
ZONES SIGNAL STATE
INLET FROM BOILER OR
OTHER DIM
BUS IMG CONNECTION
TO BOILER
CONNECTIONS TO ON/
OFF ROOM
THERMOSTATS
CONNECTION
TO DIM SAFETY
THERMOSTAT
OFF ON
Y./G.

20
3-5
INSTALLERUSER
MAINTENANCE TECHNICIAN
3.5 DIM CONNECTION TO BOILER VIA IMG BUS.
N.B.: In this mode, the remote control cannot be connected to terminals 44 and 41 of the integrated P.C.B.
On boiler models set up for digital communication with the zone control unit, the BUS dialogue can be activated with a wide exchange of
interactions between boiler and DIM, the main ones being:
e DIM will receive the following from the boiler:
- Digital zone state signal;
- Temperatures regulated on display for the Low-Temperature zones (where possible);
- External temperature probe connected to boiler.
e boiler will receive the following from the DIM:
- Zone central heating request;
- Boiler ow temperature correlated to the zones request;
- Error codes of the faults present on the zone control unit.
ONLY FOR BOILERS SET UP FOR DIGITAL COMMUNICATION WITH ZONE CONTROL UNIT.
Brown
Blue
ZONES CONTROL UNIT DIM V2
SUPERIOR KW INTEGRATED P.C.B.
Eliminate the jumper on terminal board X15 of the
integrated P.C.B.
External probe
(optional)
Power supply
230 Vac
50 Hz
Y./G.