Robur AY Series Operating instructions

Installation, user and
maintenance manual
AY Condensing line, AY series
Gas powered
4 star condensation boiler
for heating

Revision: A
Code: D-LBR531
This manual has been drawn up and printed by Robur S.p.A.; whole or partial reproduc-
tion of this manual is prohibited.
The original is led at Robur S.p.A.
Any use of this manual other than for personal consultation must be previously authori-
sed by Robur S.p.A.
The rights of those who have legitimately led the registered trademarks contained wi-
thin this publication are not aected.
With the aim of continuously improving the quality of its products, Robur S.p.A. reserves
the right to modify the data and contents of this manual without prior notice.

Installation, user and maintenance manual – AY Condensing line, AY series
3
INDEX OF CONTENTS
1 PREFACE........................................................................................................ 5
2 OVERVIEW AND TECHNICAL CHARACTERISTICS ..................................... 7
2.1 WARNINGS ...............................................................................................................................................7
2.2 OVERVIEW OF OPERATION.............................................................................................................. 10
2.3 TECHNICAL MANUFACTURING CHARACTERISTICS................................................................ 11
2.4 TECHNICAL DATA................................................................................................................................ 11
2.5 DIMENSIONS AND SERVICE PANEL............................................................................................... 14
3 NORMAL OPERATION ................................................................................17
3.1 START UP (AND SHUT DOWN)........................................................................................................ 17
3.2 ON-BOARD ELECTRONICS ............................................................................................................... 18
3.3 RESET OPERATIONS............................................................................................................................ 21
3.4 OPERATING SETTINGS....................................................................................................................... 22
3.5 PROLONGED PERIODS OF DISUSE................................................................................................ 23
4 HYDRAULIC SYSTEM INSTALLATION TECHNICIAN ................................25
4.1 GENERAL INSTALLATION PRINCIPLES.......................................................................................... 25
4.2 POSITION OF THE APPLIANCE........................................................................................................ 25
4.3 HYDRAULIC CONNECTIONS............................................................................................................ 27
4.4 GAS SUPPLY SYSTEM......................................................................................................................... 30
4.5 CONDENSATE DISCHARGE CONNECTION ................................................................................. 31
4.6 FILLING THE SYSTEM CIRCUIT (APPLIANCE).............................................................................. 32
4.7 FILLING THE APPLIANCE’S INTERNAL CIRCUIT......................................................................... 33
4.8 EXHAUSTING THE COMBUSTION PRODUCTS........................................................................... 34
4.9 PROGRAMMING OF HYDRAULIC PARAMETERS....................................................................... 38
5 ELECTRICAL SYSTEM INSTALLATION TECHNICIAN................................41
5.1 CONNECTING THE APPLIANCE TO THE MAINS......................................................................... 44
5.2 ELECTRICAL CONNECTIONS FOR THE SYSTEM CIRCULATOR.............................................. 46
5.3 CONNECTIONS FOR CONSENT SWITCH OPERATION ............................................................. 50
5.4 USE OF THE DIRECT DIGITAL CONTROLLER............................................................................... 51
6 INITIAL ACTIVATION AND MAINTENANCE..............................................63
6.1 PROCEDURE FOR INITIAL ACTIVATION........................................................................................ 63
6.2 MAINTENANCE .................................................................................................................................... 68
6.3 CHANGE OF GAS TYPE...................................................................................................................... 70
7 ACCESSORIES..............................................................................................75
8 APPENDIX ...................................................................................................77
8.1 MACHINE OPERATING CODES........................................................................................................ 77

4

Installation, user and maintenance manual – AY Condensing line, AY series
5
1 PREFACE
This "Installation, user and maintenance manual" is a guide to the installation and ope-
ration of the AY Condensing Line base-mounted gas boiler.
In particular, the manual deals with the AY00-120 model, hereinafter called "applian-
ce", of the AY Series, and is intended for use by:
nal users for the use of the appliance according to their own requirements;•
installation technicians (hydraulic and electrical) for the carrying out of a correct•
installation of the appliance and of the Direct Digital Controller (DDC).
The manual also contains:
a section that describes all the operations necessary for the“rst start-up”and for•
the“gas change”of the appliance, as well as the main maintenance operations;
an "ACCESSORIES" section with a description of accessories available and their•
respective reference codes.
Summary
The manual has 8 sections:
SECTION 1 is a brief introduction to the use of the manual itself.
SECTION 2 is intended for use by the nal user, hydraulic and electrical installation
technicians and the Robur TAC; it gives general warnings, operating instructions and
constructional specications. This section also contains technical data and dimensio-
nal drawings of the appliance.
SECTION 3 is intended for use by the nal user; it provides the information necessary
to use the appliance correctly according to the user's own requirements.
SECTION 4 is intended for use by the hydraulic installation technician; it provides the
indications necessary for the technician for the creation of the hydraulic plant and gas
supply system.
SECTION 5 is intended for use by the electrical installation technician; it provides the
information required to hook up the appliance electrically.
SECTION 6 is intended for use by the Robur TAC; it provides the indications necessary
to carry out the entire initialactivationprocedure (preliminary verication of plant com-
pliance, initial activation, and regulation of gas ow to the burners) and the operations
for change of gas type, if required. This section includes a summary of the main main-
tenance operations (checks, controls and cleaning operations to perform) to which the
appliance is subject.
SECTION 7 is intended for use by the nal user, hydraulic and electrical installation
technicians and the Robur TAC; it contains information about accessories available for
the appliance.
SECTION 8 is an appendix which lists the appliance's operating codes and associated
instructions in tabular form.
Denitions, meaning of terms and icons
APPLIANCE: 4 star condensation boiler, Robur model "AY00-120".
DDC: digital control panel (Direct Digital Controller).
TAC: Technical Assistance Centre (authorised by Robur S.p.A.).
ACS: sanitary (domestic) hot water.
UTA: air handler.
The icons used in the manual have the following meanings:
= DANGER
= WARNING
= NOTE

6
= START OF OPERATING PROCEDURE
= REFERENCE to another part of the manual or other document

Installation, user and maintenance manual – AY Condensing line, AY series
7
2 OVERVIEW AND TECHNICAL CHARACTERISTICS
In this section, for all users, you will nd general warnings, the operating principle of
the appliance and its manufacturing characteristics. This section also contains techni-
cal data and dimensional drawings of the appliance.
2.1 WARNINGS
This manual constitutes an integral and essential part of the product and must be de-
livered to the user together with the appliance.
Conformity to CE standards
The appliance is CE certied and conforms with all essential requirements of:
Gas Directive 90/396/EEC and subsequent modications and additions.•
Eciency Directive 92/42/EEC and subsequent modications and additions.•
Electromagnetic Compatibility Directive 89/336/EEC and subsequent modica-•
tions and additions.
Low Voltage Directive 89/336/EEC and subsequent modications and•
additions.
“Machinery Directive”2006/42/EC.•
UNI EN 677 Specic requisites for condensation boilers with nominal thermal•
capacity no greater than 70 kW.
UNI EN 483 Type C boilers with nominal thermal capacity no greater than 70•
kW.
Information regarding the above EC certications is given in Paragraph 2.4TECHNICAL
DATA →11, as well as on the Nameplate of the appliance itself.
Safety
The appliance must only be used for the purposes for which it has been designed. Any
other use is considered inappropriate and therefore dangerous.The manufacturer do-
es not accept any contractual or extra-contractual liability for any damage caused by
improper use of the appliance.
Do not operate the appliance if, at the moment it is to be used, dangerous conditions
arise: odour of gas in the circuit or near to the appliance; problems with the electrical/
gas mains or hydraulic circuit; parts of the appliance submerged in water or otherwise
damaged; control and safety components bypassed or defective. Ask professionally
qualied personnel for assistance.
If you smell gas:
do not operate electrical devices in the vicinity of the appliance, such as tele-•
phones, multimeters or other equipment that can cause sparks;
shut o the gas supply by means of the appropriate gas tap;•
cut o electrical power to the appliance by means of the external disconnecting•
switch that the electrical system installation technician has provided in the ap-
propriate panel;
request the assistance of professionally qualied personnel from a telephone far•
from the appliance.
Packing items (plastic bags, polystyrene foam, nails, etc.) must be kept out of the reach
of children, as they represent potential sources of danger.

8
The electrical safety of the appliance is guaranteed only when it is correctly connec-
ted to an ecient grounding system, executed in accordance with current safety
regulations.
Installation and regulatory references
When the appliance arrives at the installation site, before beginning the stages requi-
red to move it in order to position it on the site, perform a visual check to ascertain that
there are no evident signs of breakage or damage to the packaging or to the external
panels, which would be signs that damage occurred during transport.
Packing materials must be removed only after the appliance has been positioned on
site. After removing the packing materials, ensure that the appliance is intact and
complete.
Installation of the appliance may only be carried out by rms that are qualied in ac-
cordance with current legislation in the country of installation, i.e. by professionally
qualied personnel.
"Professionally qualied personnel" means personnel with specic technical compe-
tence in the sector of heating/cooling plants and gas appliances.
Installation of the appliance must be carried out in compliance with current local and
national regulations regarding the design, installation and maintenance of heating
and cooling plants in accordance with the manufacturer's instructions.
In particular, current regulations regarding the following must be observed:
Gas equipment.•
Electrical equipment.•
Heating systems employing condensation boilers.•
Every other standard and regulation that concerns the installation of equipment•
for summer and winter air conditioning using gas fuel.
The manufacturer does not accept any contractual or extra-contractual liability for any
damage caused by errors in installation and/or failure to observe the abovementioned
regulations and the instructions supplied by the manufacturer itself.
Once the appliance is installed
The rm that has undertaken the installation must provide the owner with a declara-
tion that the installation has been carried out in compliance with proper workmanship
practices, current national and local regulations, and the instructions supplied by Ro-
bur S.p.A.
Before contacting your authorised Robur Technical Assistance Centre (TAC) for the ini-
tial activation, the rm must ensure that:
the electricity and gas mains specications correspond to the specications on•
the nameplate;
the mains gas pressure falls within the range of values specied in Table•
4.1 →31;
the gas supplied to the appliance is of the type for which it is designed;•
the gas supply system and water distribution system are sealed;•
the gas and electricity supply systems are correctly rated for the capacity re-•
quired by the appliance and that they are equipped with all safety and control
devices prescribed by current regulations
Check that no safety and control devices are excluded, by-passed or not working
correctly.

Installation, user and maintenance manual – AY Condensing line, AY series
9
Initial activation procedure
The entire procedure for the rst activation of the appliance must be carried out exclu-
sively by an authorized Robur Technical Assistance Centre (TAC) and according to the
instructions supplied by the manufacturer.
To carry out entire procedure correctly, follow the instructions in Paragraph 6.1 PROCE-
DURE FOR INITIAL ACTIVATION →63.
Contact your local Robur TAC. To nd out who your local TAC is, contact Robur on 035
888.111. (Tel. [phone]). The guarantee could be voided if the initial activa-
tion is not carried out (and validated) by a Robur TAC.
Operation and maintenance of the appliance
To ensure the correct operation of the appliance and to avoid failures, control of the
switching on and o of the appliance must be carried out exclusively via a switch loca-
ted on the on/o command circuit.
If the appliance is to be connected to a Direct Digital Controller (DDC, available as an
accessory), control of activating and deactivating the appliance must be performed
exclusively through the DDC itself.
The appliance must never normally be switched on and o by shutting o the power
supply upstream of the on/o commands (DDC or other switch) before having ope-
rated these rst. With the appliance running, also wait for the shutdown cycle to end
(approximately 3 minutes) before shutting o the power supply power.
If the appliance fails to operate correctly, with the consequent indication of the Machi-
ne code, follow the instructions of Paragraph 8.1 MACHINE OPERATING CODES →77.
In the event of failure of the appliance and/or breakage of any of its parts, refrain from
any attempt to repair and/or restore operation of the appliance through direct action.
deactivate the appliance immediately (if permitted and if no condition of dan-•
ger exists) by starting the shutdown cycle via the on/o command (or DDC) and
waiting for it to terminate (approximately 3 minutes);
disconnect the appliance from the gas and electricity mains, cutting o gas sup-•
ply by means of the appropriate valve and the power supply by means of the
external circuit breaker provided by the electrical system installation technician
on the appropriate panel;
contact your local Robur TAC.•
If it is decided not to use the appliance for a prolonged period, disconnect the ap-
pliance following the instructions provided in Paragraph 3.5 PROLONGED PERIODS OF
DISUSE →23.
Correct routine maintenance ensures the eciency and good operation of the ap-
pliance over time.
Carry out maintenance operations according to the instructions supplied by the
manufacturer.
For maintenance of the appliance’s internal components, contact a Robur TAC
or qualied technician; for other maintenance requirements, see Paragraph 6.2
MAINTENANCE →68.
Any repair of the appliance must be carried out by an authorised Robur Technical Assi-
stance Centre (TAC), using only original parts.
Failure to observe the indications given above may compromise the operation and
safety of the appliance, and may invalidate its guarantee, if active.

10
If the appliance is to be disposed of, contact Robur S.p.A. for its correct disposal.
If the appliance is to be sold or transferred to another owner, ensure that this“Installa-
tion, user and maintenance manual”is handed over to the new owner and installation
technician.
2.2 OVERVIEW OF OPERATION
The appliance powered by 230 V 1N 50 Hz electrical power - .
During operation, combustion products are exhausted via the discharge terminal, with
vertical outlet, at the top of the appliance. Combustion product condensate is dischar-
ged via the special pipe which passes through the service plate (see Figure 2.3 SERVICE
PANEL: Series AY - AY Condensing line →15).
The appliance is equipped with a plate exchanger which separates the following
hydraulic circuits:
the• internal circuit dedicated to the combustion unit and factory charged to
enable storage down to -30°C;
the• system circuit. The section of circuit running from the exchanger to the
hydraulic unions on the service plate is itself a part of the system circuit.
Control and management of operation of the appliance occurs via the on-board
electronics through the microprocessor control board (see Figure 3.1 On-board
electronics →19).
Control and management of operation of the appliance may also take place via the
Direct Digital Controller (see Figure 2.1 →10) available as an accessory.
For instructions regarding the use, conguration and programming of the DDC, refer
to the two manuals supplied with the unit.
DDC conguration/programming operations must be carried out by an authorised Ro-
bur Technical Assistance Centre (TAC) during initial activation procedures and accor-
ding to the instructions supplied by the manufacturer.
Figure 2.1
Direct Digital Control (DDC)
LEGEND
DDC Direct Digital Control
AY00-120: description and general characteristics
the appliance (see Figure 2.2 Dimensional drawing of model AY00-120 →14) is a B53P
type high eciency boiler ( star eciency class as per Directive 92/42/CEE).

Installation, user and maintenance manual – AY Condensing line, AY series
11
The appliance is a Range Rated boiler: the power delivery of the appliance can be
adapted to the real system requirements by regulating the nominal gas ow (nominal
thermal input).
The appliance, which can produce hot water up to 80°C, is suited to installation in all
hot water production systems for heating, sanitary use (ACS), process needs, air han-
dlers, etc. Since the appliance is of the 2 pipe variety (water inlet and outlet), it can be
adapted to a variety of purposes (e.g.: both heating and ACS) by bleeding the system.
2.3 TECHNICAL MANUFACTURING CHARACTERISTICS
The appliance is supplied with the following technical manufacturing characteristics,
control and safety components:
premixed multigas burner with low NOX and CO emissions;•
stainless steel plate exchanger, acting as a hydraulic separator;•
AY10 microprocessor controller with LCD display and control knob (Figure 3.1•
On-board electronics →19);
S70 controller (Figure 3.1 On-board electronics• →19);
ionisation-based ame controller;•
gas solenoid valve with double shutter;•
system water antifreeze function;•
internal circuit antifreeze function;•
automatically resettable water temperature limiting thermostat;•
single-use fumes limiting thermostat (thermal cutout);•
system circuit water dierential pressure switch (PD1);•
internal circuit water dierential pressure switch (PD2) with anti-sticking•
function;
overpressure valve on internal circuit, set to trip at 3 bar;•
internal circuit expansion tank;•
automatic and manual air bleeds on the internal circuit;•
fumes pipe with terminal, for type B53P conguration.•
condensate discharge siphon (with antifreeze function).•
2.4 TECHNICAL DATA
Table 2.1 – TECHNICAL CHARACTERISTICS
AY00-120
OPERATION WHEN HEATING
Thermal capacity
Nominal (1013
mbar - 15°C) kW 34,9
MEAN kW 21.5
MIN kW 8.0
OPERATING POINT: Tm80/Tr60 and nominal thermal capacity
Available power kW 34.4
Eciency % 98.6
Operational heat
loss to jacket % 0.44
Operational heat
loss to ue % 2.54
Eciency classes ****
NOx emission class 5
Hot water delivery temperature maximum °C 80 Minimum °C 25
Nominal °C 60

12
Hot water return temperature maximum °C 70 Minimum °C 20
Nominal °C 50
Hot water ow rate Nominal l/h 1900 maximum l/h 3200
Minimum l/h 1500
Hot water pressure drop at nominal water
ow bar 0.18
Ambient air temperature (dry bulb) maximum °C 45
Minimum °C -20
gas consumption
methane G20
(nominal) m3/h 3.69
methane (MIN) m3/h 0.85
G30 (nominal) kg/h 2.75
G30 (MIN) kg/h 0.63
G31 (nominal) kg/h 2.71
G31 (MIN) kg/h 0.62
THERMAL EFFICIENCIES
Eciency at MEAN thermal capacity Tm80/Tr60 % 98.3
Eciency at MIN thermal capacity Tm80/Tr60 % 97.3
Eciency at nominal thermal capacity Tm50/Tr30 % 104.6
Eciency at 30% of nominal thermal capacity Tr=30°C % 107.5
Eciency at 30% of nominal thermal capacity Tr=47°C % 100.3
ELECTRICAL SPECIFICATIONS
Power supply
Voltage V 230
TYPE single-phase
Frequency 50 Hz
supply 50
Electrical power absorption Nominal kW 0.185
Degree of protection IP X5D
INSTALLATION DATA
Minimum storage temperature °C -30
Maximum operating temperature bar 3
Water content inside the apparatus HOT SIDE l 2.5
Water tting TYPE F
thread " G 1 1/4
Gas tting TYPE M
thread " G 3/4
Fume outlet
Type of
installation
B23P-B33-
B53P-C13-
C33-C43-C53-
C63-C83
Size mm 80
Residual head Pa 100
Product
conguration B53P
Size width mm 398 height mm 1280
depth mm 525
Weight In operation kg 71
AY00-120 - operational and installation technical characteristics.

Installation, user and maintenance manual – AY Condensing line, AY series
13
Table 2.2 – SERIE AY
SERIE AY
Water ow Water T.
20°C
(l/h) Pressure drops (bar)
1008.0 0.066
1198.0 0.085
1398.0 0.106
1608.0 0.136
1801.0 0.165
2007.0 0.204
2199.0 0.234
2400.0 0.269
2601.0 0.312
2797.0 0.353
3000.0 0.406
3201.0 0.469
Graphic 2.1 – SERIE AY
Water ow (l/h)
Pressure drops (bar)

14
2.5 DIMENSIONS AND SERVICE PANEL
Figure 2.2 – Dimensional drawing of model AY00-120
AY00-120 - front and RH side views (dimensions in mm).
LEGEND
Series AY model AY00-120

Installation, user and maintenance manual – AY Condensing line, AY series
15
Figure 2.3 – SERVICE PANEL: Series AY - AY Condensing line
Series AY - service plate (dimensions in mm).
LEGEND
G gas tting ("G 3/4 M)
A outlet water tting ("G 1 1/4 F)
B inlet water tting ("G 1 1/4 F)
C condensate drain tting (ext.
dia. 25 mm)

16

Installation, user and maintenance manual – AY Condensing line, AY series
17
3 NORMAL OPERATION
In this section you will nd all the indications necessary for the activation, regulation
and control of operation of the appliance via the controller present in the electrical
panel.
3.1 START UP AND SHUT DOWN
Ecient operation and long life of the appliance depend largely on its correct use!
Before activating the appliance, check that:
the gas valve is open;•
the appliance is powered electrically: the general electrical switch (GS) must be•
in the «ON» position;
the installation technician has ensured that the hydraulic circuit is supplied in•
the correct conditions.
If these conditions are satised, it is possible to proceed with activation.
If the appliance is not connected to a DDC, it may be activated and deactivated only by
means of the on/o command provided by the electrical installation technician.
According to requirements, this on/o command may be an on/o button, an ambient
thermostat, a programmable timer, or one or more voltage free contacts controlled by
another process.
For details about the type of on/o command installed, contact the plant’s electrical
installation technician.
Start up
Switch on the appliance by means of the on/o command (placing it in the "ON"
position).
Shut down
Switch o the appliance via the on/o command (placing it in the "OFF" position).
The shutdown cycle takes approximately 3 minutes to complete.
The on/o command is essential! Do not switch the appliance on or o by connecting
it to or disconnecting it from the power supply directly, as this may be a source of dan-
ger and in any case damage the appliance or the plants connected to it.
If the appliance is connected to a DDC running in controller mode, the appliance is
started up and controlled exclusively by the DDC.
For instructions regarding the use of the DDC, refer to the two manuals supplied with
it, and in particular: "Final user manual - manual 2"
Visualising and clearing of operating codes
Operating codes can be generated by the controller or by the DDC.
The operating codes generated by the controller are visualised on its display and may
also be visualised on the display of the DDC (if tted).
Operating codes generated by the controller can be reset with the controller itself or
from the DDC (if tted or where possible).
For a description of operating codes generated by the controller and how to reset
them, refer to the list of operating codes contained in Table 8.1 TABLE OF OPERATING
CODES generated by the controller (rmware version 3.100) →77.

18
The controller (see Figure 3.1 On-board electronics →19) is located inside the electri-
cal panel of the appliance and the display may be viewed through the viewing hole on
the front panel of the unit itself.
The Machine Codes generated by the DDC may only be viewed on the display of the
DDC and may be cleared only through the DDC.
Operating codes generated by the controller during the activation phase of the
appliance
If the appliance remains inactive for a prolonged period, it is possible that air is pre-
sent in the gas pipes. In this case the start up may not terminate successfully and the
appliance displays the operating code: "u112" - ame controller fault (seeTable 8.1 TA-
BLE OF OPERATING CODES generated by the controller (rmware version 3.100) →77)
and after a brief interval the appliance automatically launches the start up procedure
again.
If code u112 is signalled 4 times, the code persists, the appliance locks out the ame
controller and displays the following operating code: "E112" - ame controller locked
(see Table 8.1 TABLE OF OPERATING CODES generated by the controller (rmware ver-
sion 3.100) →77). In this case reset is not automatic.
To restore operation of the appliance, carry out a reset of the ame control unit via
menu 2 of the controller: the procedure is illustrated in Paragraph 3.3 RESET OPERA-
TIONS →21. After it is reset, the appliance will make a new attempt to activate.
If the appliance locks out several times, contact a Robur TAC by calling the Technical
Service Department of Robur S.p.A. (tel. [phone]).
When activation is successful, the appliance is managed by the on-board controller
(see following paragraph).
3.2 ONBOARD ELECTRONICS
The following descriptions refer to the controller with rmware version 3.101.
The appliance is tted with an AY10 controller connected to an auxiliary S70 controller
(see Figure 3.1 On-board electronics →19). The AY10 is installed over the S70 and is
located in the machine’s internal electrical panel.
The AY10 controller controls the appliance and displays data, messages and codes
during operation. Programming, control and monitoring of the appliance take place
by interacting with the display and encoder of the controller. The CAN BUS port con-
nects one or several appliances to a DDC.

Installation, user and maintenance manual – AY Condensing line, AY series
19
Figure 3.1 – On-board electronics
Controllers AY10 and S70.
LEGEND
A 4 digit display for data and
operating codes.
B Knob for scrolling through/
selecting operating data
Description of menu of AY10 controller
The parameters and settings of the appliance are grouped in the menus shown on the
controller’s display:
Table 3.1 – Menu of electronic board
MENU MENU DESCRIPTION THE DISPLAY SHOWS
Menu 0 VIEW DATA (TEMPERATURE, VOLTAGE, PUMP SPEED,
ECC...) 0.
Menu 1 VIEW ALL PARAMETERS 1.
Menu 2 ENTER ACTIONS 2.
Menu 3 USER SETTINGS (THERMOSTATING, SET-POINT, T.
DIFFERENTIAL) 3.
Menu 4 INSTALLATION TECHNICIAN SETTINGS 4.
Menu 5 TECHNICAL ASSISTANCE CENTRE SETTINGS 5.
Menu 6 TECHNICAL ASSISTANCE CENTRE SETTINGS (MACHINE
TYPE) 6.
Menu 7 VIEW DIGITAL IMPUTS 7.
Menu 8 (MENU NOT USED) 8.
E (EXIT MENU) E.
Menu list of electronic board
Menus 0, 1 and 7 are Viewing Menus: they only allow the information displayed to be
read, and not modied. Menu 0 shows the appliance operating data in real time. Me-
nu 1 shows the parameters that characterise the operation of the appliance and their
current values.
Menu 7 is to be used ONLY by the Robur TAC.
To view the information contained in these menus, proceed as illustrated in the proce-
dure explained below: HOW TO ACCESS THE MENUS.
Menu 2 is an Action Menu: it is used to reset the ame controller and errors.

20
To perform these procedures, see Paragraph 3.3 RESET OPERATIONS →21.
Menu 3 is a Settings Menu: it allows the values displayed to be set. The correct values
of these parameters, for optimum performance of the appliance with the plant to be
used connected, have already been set during installation. To set new values for the
parameters, see Paragraph 4.9 PROGRAMMING OF HYDRAULIC PARAMETERS →38.
Menus 4, 5, 6 and 7 exclusively concern the installation technician and Robur’s autho-
rized Technical Assistance Centre.
Menu 8 may currently be selected, but not used.
Display and knob
The controller’s display can be viewed through the glass of the viewing aperture on
the front panel of the appliance.
Upon activation, all display’s LED’s light up, and then the name of the controller di-
splays. Subsequently (if the on/o command switch is set to ON), the appliance begins
to operate.
During correct operation the display shows, alternately, the following information:
outlet water temperature, inlet water temperature, and the dierence between the
two water temperatures (see Table 3.2 Operating information →20).
Table 3.2 – Operating information
OPERATING MODE: HEATING
PARAMETER THE DISPLAY SHOWS
Hot outlet water temperature 50.0
Hot inlet water temperature 40.0
Dierential temperature (outlet - inlet) 10.0
Example of data visualised on display: water temperature and dierential
If there are operating problems, the display shows, sequentially, the operating codes
corresponding to the problem detected. A list of these codes with their description
and the procedure to follow to bring the appliance back to correct operation is provi-
ded in Paragraph 8.1 MACHINE OPERATING CODES →77.
The knob is used to display or set parameters, or to execute actions/commands (e.g.: a
function or reset), when permitted.
HOW TO ACCESS THE MENUS
To use the knob with the special key supplied with the appliance:•
You will need: the appliance’s electrical power switches set to “ON”; the controller’s
display sequentially shows the operating data (temperature, delta T°) regarding the
current mode (e.g.: heating) and any active operating codes ("u/E...").
Remove the front panel by removing the xing screws.1. Remove the cover of the electrical panel to access the knob.2. Use the special key through the hole to operate the knob and access the con-3. troller’s menus and parameters.
To display the menus just press the knob once: the display shows the rst menu:4. "0." (= menu 0).
The display shows“0.”. To display the other menus, turn the knob clockwise; The5. display will read, in order: "1.", "2.", "3.", "4.", "5.", "6.", "7.", "8." and "E" (see 3.1 Menu
of electronic board →19).
To display the parameters in a given menu (for example, menu 0), turn the knob6. until it displays the menu in question (in the example: "0.") and press the knob: