Immergas DIM 2 ZONE ErP, DIM 3 ZONE ErP, DIM H-2LT ERP, DIM A-2BT ErP, DIM H-LT ERP Instructions And Warnings
...
Instructions and warnings
*1.039170ENG*
IE
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)
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 qualied Aer-Sales Service, prepared and updated to guarantee the constant eciency 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 satised
with your Immergas product.
For assistance and scheduled maintenance, contact Authorised Immergas Aer-Sales centres: they have original spare parts and are specically 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 qualied 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
qualied sta, intending sta with specic 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 Aer-Sales Service represents a guarantee in terms of qualications 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
CE DECLARATION OF CONFORMITY
(according to ISO/IEC 17050-1)
e company IMMERGAS S.p.A., with registered oce in via Cisa Ligure 95 42041 Brescello (RE), whose design, manufacturing and aer-sales assistance
processes comply with the requirements of standard UNI EN ISO 9001:2008,
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, “Eciency” Directive 92/42/EC and “Low-Voltage” Directive 2006/95/EC.
Immergas S.p.A. declines all liability due to printing or transcription errors, reserving the right to make any modications to its technical and commercial
documents without prior notice.
DECLARES that:
Mauro Guareschi
Research & Development Director
Signature:
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
1.10 Kits available on request. .........................10
1.11 Main 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
3.10 Connection between 2 DIM with
hydraulics in parallel. ...............................25
3.11 DIM connection to another DIM
or to Hercules zone kit with
hydraulics in series. ..................................27
3.12 Description of main functions. ...............28
3.13 Zone management P.C.B. ......................... 28
3.14 External temperature probe (Optional). 29
3.15 Troubleshooting. .......................................29
3.16 Technical data. ..........................................30
INSTALLING
1
THE DEVICE
1.1 DESCRIPTION OF THE DEVICE.
e “DIM” code (Disgiuntore Idrico Multi-impianti) identies 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
(distribution manifold) and are available in four
dierent congurations:
• 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 dierentiated temperature (e.g. a
zone with radiators and one with radiant oor
panels);
• DIM H-2LT ErP, for the management of mixed
systems with dierentiated 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 allow for (always in safe, ecient 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-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 specically
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.
1-1
3
2
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 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. 1-2 pos. X).
Use the fairlead and the sheath-holder (3)
supplied to limit the inltration of water inside
the frame.
INSTALLERUSER
2
1
MAINTENANCE TECHNICIAN
5
1.3 MAIN DIMENSIONS.
1-2
INSTALLERUSER
Height
(mm)
700 450 190
Width (mm) Depth (mm)
MAINTENANCE TECHNICIAN
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”)
6
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”)
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 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. 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 maintenance 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 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 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 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 ecient
earthing system, as specied by current safety
standards.
Attention: Immergas S.p.A. declines any responsibility for damage or physical injury caused by
failure to connect the boiler to an ecient earth
system or failure to comply with the reference
standards.
Moreover, ensure that the electrical installation
corresponds to the maximum absorbed power
specications 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 dierential
safety device.
When replacing the power supply cable, contact a
qualied company (e.g. the Immergas Authorised
Aer-Sales Technical Assistance Service).
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. 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 mm2 and 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 specied 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).
INSTALLERUSER
MAINTENANCE TECHNICIAN
7
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
chrono-thermostat will control the pre-dened
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, dened as the main zone of the manifold,
must be le free.
Installation layout of 2 homogeneous zones. Installation layout with 3 zones in High Temperature or 3 zones in Low
INSTALLERUSER
1-3
Temperature.
1-4
MAINTENANCE TECHNICIAN
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 dene 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 dene zone 1 as the main zone.
(See g. 3-2 for electrical connection and zone board setting)
8
DIM A-BT installation layout (1 zone in H. T. and 1 zone in L. T.).
DIM H-2LT installation layout (1 zone in H. T. and 2 zone in L. T.).
1-5 1-6
INSTALLERUSER
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 dene zone 2 as the main zone.
(See g. 3-3 for electrical connection and zone board setting)
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 dene zone 2 as the main zone.
(See g. 3-4 for electrical connection and zone board setting)
9
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 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
INSTALLERUSER
the circulation pumps by acting on the main
switch positioned on the boiler control panel
aer 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 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)
C 3 lower (ΔP-C) - H=3 m
C 4 upper (ΔP-C) - H=4 m
Min. - Max. blue
MAINTENANCE TECHNICIAN
green
orange
- 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 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 (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-Temperature zones, check that the design parameters
allow you to achieve a maximum surface temperature 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 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 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
LED steady on
Flashing white LED Noises during cir-
LED steady on Flow rate too high Reduce rotation speed
LED o
Red LED
Description Diagnostics Remedy
Pump
noisy
culation of the heat
transfer uid
e circulator does
not work
Insucient system pressure, circulating pump
in cavitation
Presence of foreign matter in the impeller Remove the motor and clean the impeller
Presence of air in the system Vent the system
Power outage
Faulty circulating pump Replace the circulating pump
Rotor seized Remove the motor and clean the impeller
Insucient power supply voltage Check boiler power supply voltage
Restore correct thermal circuit pressure
Ensure the boiler is correctly powered, ensure
the circulator is correctly powered
10
1-7
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