Baxi LUNA HT 1.850 User manual

Wall-mounted condensing boilers
Installer’s and User’s instructions
EN
AUS
Hydroheat Supplies Pty Ltd
PO Box 1045, 6 Helen Kob Drive
Braeside VIC 3195
Ph 03 9588 1299 Fax [phone]

2910.024.1 - EN (AUS)
INSTRUCTIONS PERTAINING TO THE USER
Dear Customer,
We are sure your new boiler will comply with all your requirements.
Purchasing one of the BAXI products satises your ex pec ta tions: good functioning, simpli-
city and ease of use.
Do not dispose of this booklet without reading it: you can nd here some very useful infor-
mation, which will help you to run your boiler correctly and efciently .
1. Instructions prior to installation 3
2. Instructions prior to commissioning 3
3. Commissioning of the boiler 4
4. Filling the boiler 10
5. Turning off the boiler 10
6. Prolonged standstill of the system. Frost protection 10
7. Servicing instructions 10
CONTENTS
INSTRUCTIONS PERTAINING TO THE USER
INSTRUCTIONS PERTAINING TO THE INSTALLER
BAXI S.p.A., a leading European manufacturer of hi-tech boilers and heating systems, has developed CSQ-certied
quality management (ISO 9001), environmental (ISO 14001) and health and safety (OHSAS 18001) systems. This means
that BAXI S.p.A. includes among its objectives the safeguard of the environment, the reliability and quality of its products,
and the health and safety of its employees.
Through its organisation, the company is constantly committed to implementing and improving these aspects in favour
of customer satisfaction.
Do not leave any packaging (plastic bags, polystyrene, etc.) within the reach of children as
they are a potential source of danger.
BAXI S.p.A. declares that these models of boiler bear the CE mark in compliance with
the basic requirements of the following Directives:
- Gas Directive 2009/142/EC
- Efciency Directive 92/42/EEC
- Electromagnetic Compatibility Directive 2004/108/EC
- Low Voltage Directive 2006/95/EC
8. General information 11
9. Instructions prior to installation 11
10. Boiler installation 12
11. Boiler size 13
12. Installation of ue and air ducts 14
13. Connecting the mains supply 20
14. Gas valve adjustment 28
15. Setting the boiler parameters 30
16. Control and operation devices 31
17. Positioning of the ignition and ame sensing electrode 32
18. Check of combustion parameters 32
19. Activating the chimney-sweeper function 33
20. Annual maintenance 33
21. Boiler schematic 34
22. Illustrated wiring diagram 35
23. Technical data 36

3910.024.1 - EN (AUS)
INSTRUCTIONS PERTAINING TO THE USER
This appliance shall be installed in accordance with the manufacturer’s installation instructions, local gas tting, electrical
and water authority regulations, municipal building codes, AS5601 - Gas Installations and any other relevant statutory
regulations. This boiler is designed to heat water at a lower than boiling temperature at atmospheric pressure. The boiler
must be connected to a central heating system and to a domestic hot water supply system in compliance with its perfor-
mances and output power.
Have the boiler installed by a Qualied Service Engineer and ensure the following operations are accomplished:
a) careful checking that the boiler is t for operation with the type of gas available. For more details see the notice on the
packaging and the label on the appliance itself.
b) careful checking that the ue terminal draft is appropriate; that the terminal is not obstructed and that no other appliance
exhaust gases are expelled through the same ue duct, unless the ue is especially designed to collect the exhaust gas
coming from more than one appliance, in conformity with the laws and regulations in force.
c) careful checking that, in case the ue has been connected to pre-existing ue ducts, thorough cleaning has been carried
out in that residual combustion products may come off during operation of the boiler and obstruct the ue duct.
d) to ensure correct operation of the appliance and avoid invalidating the guarantee, observe the following precautions:
1. Heating circuit
1.1. new system
Before proceeding with installation of the boiler, the system must be cleaned and ushed out thoroughly to eliminate
residual thread-cutting swarf, solder and solvents if any, using suitable proprietary products.
To avoid damaging metal, plastic and rubber parts, use only neutral cleaners, i.e. non-acid and non alkaline. The
recommended products for cleaning are:
SENTINEL X300 or X400 and FERNOX heating circuit restore. To use this product proceeding strictly in accordance
with the maker’s directions.
1.2. existing system
Before proceeding with installation of the boiler, the system must be cleaned and ushed out to remove sludge
and contaminants, using suitable proprietary products as described in section 1.1.
To avoid damaging metal, plastic and rubber parts, use only neutral cleaners, i.e. non-acid and non-alkaline such
as SENTINEL X100 and FERNOX heating circuit protective. To use this product proceeding strictly in accordance
with the maker’s directions.
Remember that the presence of foreign matter in the heating system can adversely affect the operation of the
boiler (e.g. overheating and noisy operation of the heat exchanger).
Failure to observe the above will render the guarantee null and void.
WARNING - This appliance is not suitable as a pool heater.
1. INSTRUCTIONS PRIOR TO INSTALLATION
Initial lighting of the boiler must be carried out by a licensed technician. Ensure the following operations are carried out:
a) compliance of boiler parameters with (electricity, water, gas) supply systems settings.
b) compliance of installation with the laws and regulations in force.
c) appropriate connection to the power supply and grounding of the appliance.
The names of authorized Service Centres are listed on the accompanying sheet.
Failure to observe the above will render the guarantee null and void.
Prior to commissioning remove the protective plastic coating from the unit. Do not use any tools or abrasive detergents
as you may spoil the painted surfaces.
The instructions shall state the substance of the following:
This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental
capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concer-
ning use of the appliance by a person responsible for their safety.
Children should be supervised to ensure that they do not play with the appliance.
2. INSTRUCTIONS PRIOR TO COMMISSIONING

4910.024.1 - EN (AUS)
INSTRUCTIONS PERTAINING TO THE USER
020503_1100
Figure 1
IMPORTANT: The instructions contained in this manual relating to the operation of the hot water
circuit are relevant only if the appliance is actually connected to a domestic hot water system.
To correctly light the burner proceed as follows:
1) provide power supply to the boiler;
2) open the gas cock;
3) follow the directions given below regarding the adjustments to be made at the boiler control panel.
3. COMMISSIONING OF THE BOILER
KEYS DISPLAY SYMBOLS
Central heating mode setting key
Data display reset key
Parameter setting key (increase value)
Parameter setting key (decrease value)
Program access and scroll keys
Program access and scroll keys
Reset key
Domestic hot water temperature setting key
Central heating water temperature setting key
Domestic hot water on/off key
SECONDARY display
Flame present (on)
Outdoor temperature
Standby (off)
Operation in manual mode at minimum tem-
perature
Operation in manual mode at the maximum
temperature set
Operation in automatic mode
Operation in central heating mode
Operation in domestic hot water mode
Resettable alarm warning
MAIN display

5910.024.1 - EN (AUS)
INSTRUCTIONS PERTAINING TO THE USER
a) Automatic operation. Operation of the boiler is controlled by the timed program as described in point
3-5.1 “Daily timed program for operation of the central heating system”;
b) Manual operation at the maximum temperature set. The boiler comes into operation regardless of
the timed program set. The operating temperature is that set using the key (point 3-3: “Setting the
maximum central heating temperature”);
c) Manual operation at minimum temperature. The operating temperature is that set in point 3-6: “setting
the minimum central heating temperature”.
The manual transition from positions a) and b) to position c) involves shut-down of the burner and
disconnection of the pump after the post-circulation delay interval (the factory setting for this parameter
is 10 minutes).
d) standby. The boiler does not work in central heating mode, although the antifreeze function is still
enabled.
(1) Domestic hot water on/off key: Press this key to activate or inhibit this function, which is identied by the
appearance on the display of two black dashes under the symbol.
(4) Reset key. In case of a fault, referred to in point 3-7 “Faults and resetting the boiler”, the boiler can be restarted
by pressing this key for at least two seconds.
If this key is pressed with no fault present, the display will show the message “E153”, and the same key has to
be pressed again (for at least two seconds) to restart the boiler.
(9) Data key. This key can be pressed repeatedly to display the following information:
- Temperature (°C) of the domestic hot water ( );
- outdoor temperature (°C) ( ); only provided with the outdoor temperature sensor probe connected.
Press either of the keys to return to the main menu.
020503_0800
Figure 2
Dash
“Automatic mode”
active
(2) This key can be pressed to set the central heating water output temperature as described in point 3-3.
(3) This key can be pressed to set the domestic hot water temperature as described in point 3-4.
(10) Central heating mode operating key
The key can be pressed to activate four boiler central heating operating modes; these modes are identied
by a black cursor line underneath the relative symbol on the display, and are as follows:
3.1 DESCRIPTION OF KEYS

6910.024.1 - EN (AUS)
INSTRUCTIONS PERTAINING TO THE USER
a) Press either of the keys to access the programming function;
the display will show the letter P followed by a number (program line);
b) press the keys until the display shows P1, referring to the time to be set;
c) press the keys to set the time; on the display, the letter P will start to ash;
d) press the key to save and exit the programming function
020503_0700
Figure 3
3.2 SETTING THE TIME
- Press the key (2-gure 1) to set the central heating water temperature;
- Press the keys to set the temperature required;
- press either of the keys (1 or 10 - gure 1) to save and return to the main menu.
NOTE – With the outdoor sensor probe connected, the key (2 - gure 1) can be used to shift the central heating
curve. Press the keys to decrease or increase the room temperature in the premises to be heated.
3.3 SETTING THE MAXIMUM CENTRAL HEATING TEMPERATURE
- Press the key (3-gure 1) to set the maximum domestic hot water temperature;
- Press the keys to set the temperature required;
- press either of the keys (1 or 10 - gure 1) to save and return to the main menu.
3.4 SETTING THE MAXIMUM DOMESTIC HOT WATER TEMPERATURE

7910.024.1 - EN (AUS)
INSTRUCTIONS PERTAINING TO THE USER
- Press either of the keys to access the programming function;
a) press these keys until the display shows P11, referring to the program start time;
b) press the keys to set the time;
- press the key; the display will show P12, referring to the program end time;
- repeat the operations described in points a and b until the third and last cycle is reached (program line P16);
- press the key to save and exit from the programming function.
3.5 SETTING THE DAILY PROGRAM FOR OPERATION IN CENTRAL HEATING AND DOMESTIC HOT WATER MODES
3.5.1 Setting the daily times for central heating mode operation
3.5.2 Setting the daily times for domestic hot water mode operation
- As supplied by the factory the appliance is set up with the domestic hot water function always enabled and the domestic
hot water programming function disabled.
The instructions for enabling this program are given in chapter 15, which is addressed specically to installers (parameter
H91).
If the program is enabled program lines from 31 to 36 must be set up as described in heading 3-5.1.
3.6 SETTING THE MINIMUM CENTRAL HEATING TEMPERATURE
- press either of the keys to access the programming function;
- press these keys until the display shows P5, referring to the temperature to be set;
- press the keys to set the temperature required.
This operating mode is enabled when minimum temperature central heating mode “ ” is activated or when the daily
central heating program does not require heat.
NOTE – With the outdoor sensor probe connected, parameter P5 can be used to set the minimum room tempe-
rature in the premises to be heated.

8910.024.1 - EN (AUS)
INSTRUCTIONS PERTAINING TO THE USER
3.7 TABLE OF USER-SETTABLE PARAMETERS
If a fault occurs, a ashing warning code appe-
ars on the display.
The fault warnings appear on the main display
(gure 1 a) together with the symbol (Figure
4).
To reset, press the reset button for at least
two seconds.
020503_0500
Figure 4
020503_0600
Figure 4.1
Fault warnings appear on the secondary display
(gure 1 b) alternating with the time, both of
them ashing (gure 4.1). It is not possible to
reset malfunction warnings which appear on
the secondary display as the cause of the alarm
has rst to be removed.
3.8 FAULT WARNINGS AND RESETTING THE BOILER
Parameter
N. Parameter description Factory setting Range
P1 Time of day setting ———- 0…23:59
P5 Minimum central heating temperature setting (°C) 25 25..80
P11 Start of rst daily period of automatic central heating 6:00 00:00…24:00
P12 End of rst daily period of automatic central heating 22:00 00:00…24:00
P13 Start of second daily period of automatic central heating 0:00 00:00…24:00
P14 End of second daily period of automatic central heating 0:00 00:00…24:00
P15 Start of third daily period of automatic heating 0:00 00:00…24:00
P16 End of third daily period of automatic central heating 0:00 00:00…24:00
P31 Start of rst daily period of domestic hot water production (*) 0:00 00:00…24:00
P32 End of rst daily period of domestic hot water production (*) 24:00 00:00…24:00
P33 Start of second daily period of domestic hot water production (*) 0:00 00:00…24:00
P34 End of second daily period of domestic hot water production (*) 0:00 00:00…24:00
P35 Start of third daily period of domestic hot water production (*) 0:00 00:00…24:00
P36 Fine End of third daily period of domestic hot water production (*) 0:00 00:00…24:00
P45
Reset of daily central heating and domestic hot water production programs (factory
settings). Press the - + keys together for about 3 seconds; the number 1 appears on the
display. Conrm by pressing either of the keys
0 0...1
NOTE: Parameters from P31 to P36 can be displayed only if the domestic hot water program has been enabled as
described in chapter 15 for the attention of the installer (parameter H91).

9910.024.1 - EN (AUS)
INSTRUCTIONS PERTAINING TO THE USER
All the faults are displayed in order of importance; if several faults occur simultaneously, the rst to be displayed is the one
with highest priority. After the cause of the rst fault has been removed, the second one will be displayed, and so on.
If any given fault occurs frequently, contact the authorised Service Centre.
In case of electrical power supply faults when the boiler is in operation, no gas leakage will occurr, as the gas valve will turn off
leaving the gas duct closed. The boiler will not signal any failure (lockout error will not appear), and, in case the heating request
is still pending after the electrical power supply resumes, it restart to light on the burner starting a new heating cycle.
WARNING: POWER SUPPLY FAULTS
3.9 FAULT WARNINGS TABLE
Fault code Fault description action required
E10 outdoor temperature probe sensor failure call the authorised service centre.
E20 NTC output sensor failure call the authorised service centre
E40 NTC return heating probe faulty call the authorised service centre
E50 domestic hot water ntc sensor failure call the authorised service centre
E110
Safety or fumes thermostat or heating return
temperature probe tripped
press the reset key (for about 2 seconds: if this device is triggered
repeatedly, call the authorised service centre)
E111 Delivery temperature higher than 95°C If this fault persists, call the authorised service centre
E128 Loss of ame during operation (the ionization current
has fallen below the limit) Call an authorised service centre.
E129 Minimum fan speed limit is hurt Call an authorised service centre.
E132 oor thermostat tripped call the authorised service centre
E133 no gas press the reset key (for about 2 seconds); if the fault persists,
call the authorised service centre)
E151 boiler circuit board error
Press the reset button if the display presents the ( ) symbol,
otherwise switch off the boiler at the mains and switch it on again
after 10 seconds. If the fault persists, call an authorised service
centre. Check the position of the ignition electrodes (chapter 17).
E153 the reset key has been pressed inappropriately press the key again (about 2 seconds)
E154 No circulation or reverse flow call the authorised service centre
E160 fan speed threshold not reached call the authorised service centre.
E164 no hydraulic pressure switch enabling signal
check that the system is at the rated pressure. (refer to the
section on lling the system). if the fault persists, call the
authorised service centre.

10 910.024.1 - EN (AUS)
INSTRUCTIONS PERTAINING TO THE USER
To shut down the boiler switch off the electrical supply to the appliance.
IMPORTANT: Regularly check that the pressure displayed by the pressure gauge is 1 to 1.5 bar, with boiler not operating.
In case the pressure is lower open the boiler lling tap.
We recommend you open the tap very slowly in order to let off the air.
In case pressure drops occur frequently have the boiler checked by a Qualied Service Engineer.
N.B.: Take special care when lling the heating system. In particular, open any thermostat valves in the system, ensure the
water enters slowly in order to prevent the formation of air inside the primary circuit until operating pressure is reached.
Lastly, vent any radiators in the system. BAXI declines all liability for damage deriving from the presence of air bubbles in
the primary exchanger due to the incorrect or imprecise observance of the above.
We recommend you avoid draining the whole system as water replacements engender purposeless and harmful limestone
deposits inside the boiler and on the heating elements.
In case the boiler is not operated during wintertime and is therefore exposed to danger of frost we suggest you add some
specic-purpose anti-freeze to the water contained in the system (e.g.: propylene glycole coupled with corrosion and
scaling inhibitors).
The electronic management of boilers includes a ‘frost protection’ function which operates the burner to reach a heating
ow temperature of 30° C when the system heating ow temperature drops below 5°C.
The frost protection function is enabled if:
* electrical supply to the boiler is on;
* the gas service cock is open;
* the system pressure is as required;
* the boiler is not blocked.
To maintain efcient and safe operation of your boiler have it checked by a Qualied Service Engineer at the end of every
operating period. Careful servicing will ensure economical operation of the system.
Do not clean the outer casing of the appliance with abrasive, aggressive and/or easily ammable cleaners (i.e.: gasoline,
alcohol, and so on). Always isolate the electrical supply to the appliance before cleaning it (see section 5 Turning off the
boiler).
These boilers produced for natural gas can be converted to work with LPG.
Any gas change should be performed by an authorised person.
Servicing shall be carried out only by authorised personnel.
For service and spare parts contact Hydroheat Supplies on [phone].
4. FILLING THE BOILER
5. TURNING OFF THE BOILER
6. PROLONGED STANDSTILL OF THE SYSTEM. FROST PROTECTION
7. SERVICING INSTRUCTIONS AND GAS CHANGE

11 910.024.1 - EN (AUS)
INSTRUCTIONS PERTAINING TO THE INSTALLER
This boiler is designed to heat water at a lower than boiling temperature at atmospheric pressure. The boiler must be
connected to a central heating system and, on models withis option, to a domestic hot water supply system in compliance
with its performances and output power.
IMPORTANT! The gas boiler is supplied without the following components witch must be performed exclusively by
qualied personnel:
• Expansion vessel;
• Pressure relief valve;
• Circulating pump;
• Boiler filling tap;
• Low loss header.
Before connecting the boiler have the following operations effected:
a) careful checking that the boiler is t for operation with the type of gas available. For more details see the notice on the
packaging and the label on the appliance itself.
b) careful checking that the ue terminal draft is appropriate; that the terminal is not obstructed and that no other appliance
exhaust gases are expelled through the same ue duct, unless the ue is especially designed to collect the exhaust gas
coming from more than one appliance, in conformity with the laws and regulations in force.
c) careful checking that, in case the ue has been connected to pre-existing ue ducts, thorough cleaning has been carried
out in that residual combustion products may come off during operation of the boiler and obstruct the ue duct.
To ensure correct operation of the appliance and avoid invalidating the guarantee, observe the following precautions:
The following remarks and instructions are addressed to Service Engineers to help them carry out a faultless installation. In-
structions regarding lighting and operation of the boiler are contained in the ‘Instructions pertaining to the user’ section.
Note that installation, maintenance and operation of the domestic gas appliances must be performed exclusively by qua-
lied personnel in compliance with current standards.
Please note the following:
* This boiler can be connected to any type of convector plates, radiators, thermoconvectors. Design the system sections
as usual though taking into account the available output / pump head performances.
* Do not leave any packaging components (plastic bags, polystyrene, etc.) within children’s reach as they are a potential
source of danger.
* Initial lighting of the boiler must be effected by a Qualied Service Engineer.
Failure to observe the above will render the guarantee null and void.
This appliance shall be installed in accordance with the manufacturer’s installation instructions, local gas tting, electrical
and water authority regulations, municipal building codes, AS5601 - Gas Installations and any other relevant statutory
regulations.
WARNING - Before Leaving
Test the operation of the appliance after installation is complete. Check all connections for gas leaks with soap and water.
DO NOT use a naked ame for detecting leaks. When satised with the boiler, please instruct the user on the correct
method of operation. In case the appliance fails to operate correctly after all checks have been carried out, refer to the
authorised service provider in your area”.
8. GENERAL INFORMATION
9. INSTRUCTIONS PRIOR TO INSTALLATION

12 910.024.1 - EN (AUS)
INSTRUCTIONS PERTAINING TO THE INSTALLER
1. Heating circuit
1.1. new system
Before proceeding with installation of the boiler, the system must be cleaned and ushed out thoroughly to eliminate
residual thread-cutting swarf, solder and solvents if any, using suitable proprietary products.
To avoid damaging metal, plastic and rubber parts, use only neutral cleaners, i.e. non-acid and non alkaline. The
recommended products for cleaning are:
SENTINEL X300 or X400 and FERNOX heating circuit restore. To use this product proceeding strictly in accordance
with the maker’s directions.
1.2. existing system
Before proceeding with installation of the boiler, the system must be cleaned and ushed out to remove sludge and
contaminants, using suitable proprietary products as described in section 1.1.
To avoid damaging metal, plastic and rubber parts, use only neutral cleaners, i.e. non-acid and non-alkaline such us
SENTINEL X100 and FERNOX heating circuit protective. To use this product proceeding strictly in accordance with the
maker’s directions.
Remember that the presence of foreign matter in the heating system can adversely affect the operation of the boiler (e.g.
overheating and noisy operation of the heat exchanger).
Failure to observe the above will render the guarantee null and void.
Decide upon the boiler location, then tape the template on the wall.
Connect the pipework to the gas and water inlets prearranged on the template lower bar.
If you are either installing the boiler on a pre-existent system or substituting it, we suggest you also t settling tanks on
the system return pipework and under the boiler to collect the deposits and scaling which may remain and be circulated
in the system after the purge.
When the boiler is xed on the template connect the ue and air ducts (ttings supplied by the manufacturer) according
to the instructions given in the following sections.
Connect the condensate outlet to the siphon supplied with the boiler. Connect the siphon to a drain, making sure there is
a continuous slope. Horizontal sections must be avoided.
The boiler unit is tted for connection to an external boiler. For this purpose, unscrew the two plugs on the heating system
delivery/return ttings if a hydraulic separator is not used (see g. 12).
- The boiler MUST be installed within the building.
- The boiler must be installed on a at vertical wall which is capable of supporting the weight of the boiler.
- There must be a minimum distance of 20mm between the boilers when they are installed side by side.
- There must be a minimum clearance of 450mm between the top edge of the boiler and any horizontal surface above
the boiler. There must be a minimum distance of 45mm between the side of the boiler and any combustible material. A
clear space of at least 600mm must be provided in front of the boiler, to allow access for service purposes.
- Refer to AS5601 for gas pipe size details.
N.B.: Take special care when lling the heating system. In particular, open any thermostat valves in the system,
ensure the water enters slowly in order to prevent the formation of air inside the primary circuit until operating
pressure is reached. Lastly, vent any radiators in the system. BAXI declines all liability for damage deriving from
the presence of air bubbles in the primary exchanger due to the incorrect or imprecise observance of the above.
10. BOILER INSTALLATION

13 910.024.1 - EN (AUS)
INSTRUCTIONS PERTAINING TO THE INSTALLER
Figure 6
0602_1002 / CG_1786
11. BOILER SIZE
Figure 5
MR: G 1-1/2” heating flow
RR: G 1-1/2” heating return
GAS: G 1” gas inlet to the boiler
SC: condensation drain
0608_0521 / CR_0036 GB

14 910.024.1 - EN (AUS)
INSTRUCTIONS PERTAINING TO THE INSTALLER
12. INSTALLATION OF FLUE AND AIR DUCTS
We guarantee ease and exibility of instal lation for a gas-red forced draft boiler thanks to the ttings and xtures supplied
(described below).
The boiler is especially designed for connection to an exhaust ue / air ducting, with either coaxial, vertical or horizontal
terminal. By means of a splitting kit a two-pipe system may also be installed.
In case exhaust and intake flues not supplied by BAXI S.p.A. have been installed, these must be certified for the
type of use and must have a maximum pressure drop in according to the values reported in the table (par 12.1).
Warnings for the following types of installation:
C13, C33 The terminals for the split ue must be provided
for within a square with 50 cm sides. Detailed
instructions are given together with each
accessory.
C53 The terminals for combustion air intake and for
the expulsion of combustion products must not
be provided for on opposite walls of the building.
C63 The maximum pressure drop of the ducts must
not exceed the values reported in the table. The
ducts must be certied for the specic use and
for a temperature of over 100°C. The chimney ue
must be certied in accordance with the prEN
1856-1 Regulation.
C43, C83 The chimney or ue used must be suitable for the
use.
WARNING : To guarantee more operating insurance it
is necessary to assure the flue pipes to the wall using
the apposite clamps.
Figure 7
0310_0104
… coaxial flue - air duct (concentric)
990519_0400
Concentric outlet
Figure 8
This type of duct allows to disengage exhaust gases and to draw com-
bustion air both outside the building and in case a LAS ue is tted.
The 90° coaxial bend allows to connect the boiler to a ue-air duct in
any direction as it can rotate by 360°. It can moreover be used as a
supplementary bend and be coupled with a coaxial duct or a 45° bend.
If the ue outlet is placed outside, the ue-air ducting must protrude
at least 18mm out of the wall to allow alluminium weathering tile to be
tted and sealed to avoid water leakages.
Make sure there is a minimum downward slope of 1 cm per metre of
duct towards the boiler.
• A 90° bend reduces the total duct length by 1 metre.
• A 45° bend reduces the total duct length by 0.5 metre.
Flue duct terminal Max. length
of flue duct
Each 90° bend
reduces the duct
max. length by
Each 45° bend
reduces the duct
max. length by
Flue
terminal
diameter
Outer
terminal
diameter
Coaxial Ø 110/160 mm 10 m 1 m 0,5 m 163 mm 160 mm
Vertical two-pipe 27 m 0,5 m 0,25 m 163 mm 110 mm
Horizontal two-pipe 27 m 0,5 m 0,25 m - 110 mm

15 910.024.1 - EN (AUS)
INSTRUCTIONS PERTAINING TO THE INSTALLER
Horizontal flue terminal Ø 110/160 mm installation options
LAS flue duct Ø 110/160 mm installation options
0310_0105
L max = 10 m
0310_0106
Vertical flue terminal Ø 110/160 mm installation options
This type of installation can be carried out both on a at or pitched roof by tting a terminal, an appropriate weathering
tile and sleeve, (supplementary ttings supplied on demand).
L max = 10 m L max = 10 m L max = 9 mL max = 8 m
0310_0107

16 910.024.1 - EN (AUS)
INSTRUCTIONS PERTAINING TO THE INSTALLER
• A 90° bend reduces the total duct length by 0.5 metre.
• A 45° bend reduces the total duct length by 0.25 metre.
… separated flue-air ducting
This type of ducting allows to disengage exhaust ue gases both outside the building and into single ue ducts.
Comburant air may be drawn in at a different site from where the ue terminal is located.
The splitting kit consists of an air cap (160/110) and of an air duct adaptor.
For the air duct adaptor t the screws and seals previously removed from the cap .
The 90° bend allows to connect the boiler to ue-air ducting regardless of direction as it can be rotated by 360°. It can
moreover be used as a supplementary bend to be coupled with the duct or with a 45° bend.
0609_2702 / CR_0062
intake air cap
intake air duct adapter
0702_0801

17 910.024.1 - EN (AUS)
INSTRUCTIONS PERTAINING TO THE INSTALLER
IMPORTANT: if tting a single exhaust ue duct, ensure it is adequately insulated (e.g.: with glass wool) wherever
the duct passes through building walls.
For detailed instructions concerning the installation of ttings refer to the technical data accompanying the ttings.
Separated horizontal flue terminals installation options
IMPORTANT - Make sure there is a minimum downward slope of 1 cm per metre of duct towards the boiler. Make
sure the ue and air ducts are rmly xed to the wall with suitable brackets.
To ensure the correct rated heat input to the maximum and minimum heat input, it is necessary to update the speed
(rpm) of the fan, it depends on the lenght of the pipes (par. 12), in accordance with the installation of ue and air pipes as
indicated in the tables below. The factory-set value is referred to the minimum length of ue pipe (0÷2 m for concentric,
0÷6 m for twin). To carry such updating, changing the speed of the fan (rpm) at the maximum and minimum heat input,
refer to par. 15.
12.1 FAN RPM UPDATING DEPEND OF PIPES LENGHT (E.G. FIGURE 7)
The maximum length of the
suction duct must be 7 metres.
(L1 + L2) max = 27 m
0804_1201

18 910.024.1 - EN (AUS)
INSTRUCTIONS PERTAINING TO THE INSTALLER
LUNA HT 1.850
CONCENTRIC PIPE Ø 110/160
(C13 – C33 – C43)
TWIN PIPE Ø 110
(C13 – C33 – C43 – C53 – C83)
TABLE FUMES PRESSURE AVAILABLE
GAS
PIPES
LENGTH
L
(m)
PARAMETERS
ΔP
MAX HEAT OUTPUT MIN HEAT OUTPUT IGNITION LOAD
H536-H613
(rpm)
H541-H610
(pwm%)
H612
(rpm)
H609
(pwm%)
H611
(rpm)
H608
(pwm%) (Pa)
G20
0 m ÷ 2 m 5500 100 1750 14 2400 20 140
2 m ÷ 6 m 5850 100 1850 14,5 3450 30 300
6 m ÷ 10 m 6200 100 2000 15 4300 45 400
G31
0 m ÷ 2 m 5200 100 1650 13 3700 35 140
2 m ÷ 6 m 5450 100 1750 13,5 3700 35 300
6 m ÷ 10 m 5750 100 1850 14 4050 40 400
GAS
PIPES
LENGTH
L1 + L2
(m)
PARAMETERS
ΔP
MAX HEAT OUTPUT MIN HEAT OUTPUT IGNITION LOAD
H536-H613
(rpm)
H541-H610
(pwm%)
H612
(rpm)
H609
(pwm%)
H611
(rpm)
H608
(pwm%) (Pa)
G20
0 m ÷ 15 m 5500 100 1750 14 2400 20 140
15 m ÷ 27 m 5650 100 1800 14 4000 40 190
G31
0 m ÷ 15 m 5200 100 1650 13 3700 35 140
15 m ÷ 27 m 5350 100 1700 13,5 4200 45 190
GAS
PARAMETERS ΔP
MAX HEAT OUTPUT MIN HEAT OUTPUT IGNITION LOAD
H536-H613
(rpm)
H541-H610
(pwm%)
H612
(rpm)
H609
(pwm%)
H611
(rpm)
H608
(pwm%) (Pa)
G20 5850 100 2000 15 3000 25 230
G31 5450 100 1850 14 3700 35 230

19 910.024.1 - EN (AUS)
INSTRUCTIONS PERTAINING TO THE INSTALLER
LUNA HT 1.1000
CONCENTRIC PIPE Ø 110/160
(C13 – C33 – C43)
TWIN PIPE Ø 110
(C13 – C33 – C43 – C53 – C83)
GAS
PARAMETERS ΔP
MAX HEAT OUTPUT MIN HEAT OUTPUT IGNITION LOAD
H536-H613
(rpm)
H541-H610
(pwm%)
H612
(rpm)
H609
(pwm%)
H611
(rpm)
H608
(pwm%) (Pa)
G20 6650 100 2050 12 3900 25 180
G31 6200 80 1950 11,5 3900 35 180
TABLE FUMES PRESSURE AVAILABLE
GAS
PIPES
LENGTH
L
(m)
PARAMETERS
ΔP
MAX HEAT OUTPUT MIN HEAT OUTPUT IGNITION LOAD
H536-H613
(rpm)
H541-H610
(pwm%)
H612
(rpm)
H609
(pwm%)
H611
(rpm)
H608
(pwm%) (Pa)
G20
0 m ÷ 2 m 6400 100 1850 11 3100 20 140
2 m ÷ 6 m 6650 100 1950 11,5 3900 25 300
6 m ÷ 10 m 6900 100 2050 12 4300 30 400
G31
0 m ÷ 2 m 6000 80 1700 10,5 3100 20 140
2 m ÷ 6 m 6200 80 1850 11 3900 25 300
6 m ÷ 10 m 6400 80 1950 11,5 4300 30 400
GAS
PIPES
LENGTH
L1 + L2
(m)
PARAMETERS
ΔP
MAX HEAT OUTPUT MIN HEAT OUTPUT IGNITION LOAD
H536-H613
(rpm)
H541-H610
(pwm%)
H612
(rpm)
H609
(pwm%)
H611
(rpm)
H608
(pwm%) (Pa)
G20
0 m ÷ 15 m 6400 100 1850 11 3100 20 140
15 m ÷ 27 m 6500 100 1950 11,5 4300 30 190
G31
0 m ÷ 15 m 6000 80 1700 10,5 3100 20 140
15 m ÷ 27 m 6100 80 1800 11 4300 30 190

20 910.024.1 - EN (AUS)
INSTRUCTIONS PERTAINING TO THE INSTALLER
13. CONNECTING THE MAINS SUPPLY
Electrical safety of the appliance is only guaranteed by correct grounding, in compliance with the applicable laws and
regulations.
Connect the boiler to a 230V monophase + ground power supply by means of the three-pin cable supplied with it and
make sure you connect polarities correctly.
Use a double-pole switch with a contact separation of at least 3mm in both poles.
In case you replace the power supply cable t a HAR H05 VV-F’ 3x0.75mm2 cable with an 8mm diameter max.
The fuse, a fast-acting type rated 2A, is incorporated into the power supply terminals (remove the black fuse holder to
enable inspection and/or replacement).
IMPORTANT: Check that the overall current drawn by accessories connected to the appliance is less than 2 A. If the
value is greater, a relay must be wired between the boiler control circuit board and the accessories drawing the higher
current.
Turn the control box downwards and access the terminal blocks M1 and M3 by taking off the main protective cover.
The pumps of the heating system (P1 and P2) have to be connected to boiler terminal block following the wiring of gure
10, a relay must be wired between the boiler control circuit board and the pumps.
If the boiler unit’s electronic card is wired up to a single pump with these characteristics
230 V AC; 50 Hz; 1 A max; cos f > 0.8.
then it is not necessary to add a relay.
Check the correct size and rating of the pump by referring to graph n° 1, which shows the boiler pressure losses.
13.1 CONNECTING THE PUMP - HEATING SYSTEM
Figura 9
0902_1201 / CT_0674
Terminal board
Terminal board
Cover
Terminal board
Cover