Baxi Luna 3 Comfort User guide

BAXI S.p.A. , l’une des entreprises leader en Europe dans la production d’appareils de chauffage et sanitaires à usage domestique,
(chaudières murales à gaz, chaudières au sol, chauffe-eau électriques, plaques de chauffe en acier), a obtenu la certication CSQ de
conformité aux normes UNI EN ISO 9001. Ce certicat assure que le Système de Qualité en usage aux usines BAXI S.p.A. de Bassano
del Grappa, où l’on a produit cette chaudière, satisfait la plus sévère des normes - c’est-à-dire la UNI EN ISO 9001 - qui concerne tous
les stades d’organisation et le personnel intéressé du procès de production et distribution.
BAXI S.p.A., one of the leading European enterprises to produce central heating and hot water devices for domestic use (wall-moun-
ted gaz-operated boilers, oor-standing boilers, electrical water-heaters and steel heating plates) has obtained the QSC certicate of
conformity to the UNI EN ISO 9001 norms. This certicate guarantees that the Quality System applied at the BAXI S.p.A. factory in
Bassano del Grappa, where your boiler was produced, meets the standards of the UNI EN ISO 9001 norm, which is the strictest and
concerns all organization stages and operating personnel involved in the production and distribution processes.
UNI EN ISO 9001
CERTIFICAZIONE DEI SISTEMI
QUALITA' DELLE AZIENDE
High efficiency gas fired wall mounted combination boiler
Chaudière murale à gaz à rendement élevé
Installation and servicing instructions
Notice d’installation et d’entretien
WARNING: If the information in these instructions
is not followed exactly, a re or explosion may result
causing property damage, personal injury or death.
— Do not store or use gasoline or other ammable
vapors and liquids in the vicinity of this or any
other appliance.
— WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use
any phone in your building.
• Immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s
instructions.
• If you cannot reach your gas supplier, call the
re department.
— Installation and service must be performed by a
qualied installer, service agency or the gas sup-
plier.
AVERTISSEMENT: Assurez-vous de bien suivre les instruc-
tions dennées dans cette notice pour réduire au minimum le
risque d’incendie ou d’explosion ou pour éviter tout dom-
mage matériel, toute blessure ou la mort.
— Ne pas entreposer ni utiliser d’essence ou ni d’autres
vapeurs ou liquides inammables à proximité de cet
appareil ou de tout autre appareil.
— QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE GAZ
• Ne pas tenter d’allumer d’appareil.
• Ne touchez à aucun interrupteur; ne pas vous
servir des téléfhones se trouvant dans le bâtiment.
• Appelez immédiatement votre fournisseur de gaz
depuis un voisin.
Suivez les instructions du fournisseur.
• Si vous ne pouvez rejoindre le fournisseur, appelez
le service des incendies.
— L’installation et l’entretien doivent être assurés par un
installateur ou un service d’entretien qualié ou par le
forunisseur de gaz.

2925.188.3 - GB
INSTRUCTIONS PERTAINING TO THE INSTALLER
1. Introduction 3
2. Technical data 4
3. General boiler information 10
4. Installation 19
5. Commissioning 21
6. Boiler operation 25
7. Remote control installation 26
8. Connection of the external sensor probe 27
9. Connecting an external hot water tank 28
10. Electrical connections to a multi-zone system 29
11. Solar function 30
12. Pre-heat function 30
13. Routine servicing 30
14. Component replacement or periodic cleaning 31
15. How to purge the DHW system from limestone deposits 34
16. How to dusassemble the DHW heat exchanger 34
17. Cleaning the cold water lter 34
18. Parameters display 35
19. Parameters setting 37
20. Illustrated wiring diagram 38
21. Service history 40
CONTENTS
“Should overheating occur or the gas supply fail to shut off, do not turn
off or disconnect the electrical supply to the pump. Instead, shut off the
gas supply at a location external to the appliance”
Do not use this boiler if any part has been under water. Immediately call a
qualied service technician to inspect the boiler and to replace any part of
the control system and any gas control which has been under water.
WARNING: If the information in this manual is not followed exactly, a re or explosion may result causing pro-
perty damage, personal injury or loss of life.
— Do not store or use gasoline or other ammable vapors and liquids in the vicinity of this or any other
appliance.
— WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any phone in your building.
• Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the re department.
— Installation and service must be performed by a qualied installer, service agency or the gas supplier.

3925.188.3 - GB
INSTRUCTIONS PERTAINING TO THE INSTALLER
The Luna 3 310 Fi - 1.310 Fi boilers are wall hung, fan assisted room-sealed boilers. Heat output is controlled by a modu-
lating gas valve.
The boilers, providing both central heating and domestic hot water at mains pressure, is designed for use with a fully
pumped, sealed and pressurised heating system.
The boilers are supplied with a pump, diverter valve, pressure relief valve, expansion vessel and pressure gauge fully
assembled and tested.
As supplied, the boilers will automatically modulate to provide central heating outputs between 10.4 and 31.0 kW (35 486
and 105 776 Btu/h).
The maximum output available for domestic hot water is 31.0 kW (105 776 Btu/h), capable of providing 2.8 gal/min. - 12.7
litres/min with a temperature rise of 63°F/35 °C.
IMPORTANT
It is the law that all gas appliances are installed by a competent person.
It is in your own interest and that of safety to ensure that the law is complied with.
• The installation must conform to the requirements of the authority having jurisdiction or, in the absence of such requi-
rements, to the National Fuel Gas Code, ANSI Z223.1/NFPA 54
Where required by the authority having jurisdiction, the installation must conform to the Standard for Controls and
Safety Devices for Automatically Fired Boilers, ANSI/ASME CSD-1.*
Safe lighting and other performance criteria were met with the gas manifold and control assembly provided on boiler
when boiler underwent tests specied in ANSI Z21.13-latest edition.
• The installation should conform with CGA B149.1 INSTALLATION CODE and/or local installation Code, plumbing or
waste water codes and other codes as applicable.
• Clearances from and protection of combustible material.
• Manufacturer’s instructions must NOT be taken in anyway as over-riding statutory obligations.
1. INTRODUCTION

4925.188.3 - GB
INSTRUCTIONS PERTAINING TO THE INSTALLER
2. TECHNICAL DATA
2.1 PERFORMANCE
Central Heating MAX MIN
0÷2000 Ft 2000÷4500 Ft
0÷610 m 610÷1370 m
Heat Input Btu/h 126 249 120 107 45 040
(Gross) kW 37 35.2 13.2
Heat Output (modulating) Btu/h 105 776 100 658 35 486
kW 31 29.5 10.4
Burner Pressure Setting p.s.i. 0.203 0.186 0.0261
natural gas (A) mbar 14.0 12.8 1.8
Gas Rate ft3/h 124.2 118.2 44.5
natural gas (A) m3/h 3.52 3.35 1.26
Burner Pressure Setting p.s.i. 0.3541 0.3338 0.0479
LP gas (E) mbar 24.4 23.0 3.3
Gas Rate ft3/h 49.0 46.6 17.29
LP gas (E) m3/h 1.39 1.32 0.49
CH Water Temp. °F 185
(Approx.) °C 85
Domestic Hot Water MAX MIN
0÷2000 Ft 2000÷4500 Ft
0÷610 m 610÷1370 m
Heat Input Btu/h 126 249 120 107 45 040
(Gross) kW 37 35.2 13.2
Heat Output (modulating) Btu/h 105 776 100 658 35 486
kW 31 29.5 10.4
Burner Pressure Setting p.s.i. 0.203 0.186 0.0261
natural gas (A) mbar 14.0 12.8 1.8
Gas Rate ft3/h 124.2 118.2 44.5
natural gas (A) m3/h 3.52 3.35 1.26
Burner Pressure Setting p.s.i. 0.3541 0.3338 0.0479
LP gas (E) mbar 24.4 23.0 3.3
Gas Rate ft3/h 49.0 46.6 17.29
LP gas (E) m3/h 1.39 1.32 0.49
Flow Rate (Can) G.P.M. 2.4
at 72°F/40°C Rise (USA) G.P.M. 2.9
l/m 11.1
Outlet Water Temp. °F 149
(Approx.) °C 65

5925.188.3 - GB
INSTRUCTIONS PERTAINING TO THE INSTALLER
2.2 SYSTEM
Central Heating (Sealed System)
Max System Pressure 30 p.s.i. / 2.11 bar
Min System Pressure 7.25 p.s.i. / 0.5 bar
Max System temperature 185°F / 85°C
Pressure Relief Valve Setting 30 p.s.i. / 2.11 bar
Expansion Vessel Size 2.2 Gal / 10 l
(pre-charge press.) at 11.6 p.s.i. / 0.8 bar
Flow Connection 3/4” / 22.2 mm
Return Connection 3/4” / 22.2 mm
Relief Valve Connection 3/4” / 22.2 mm
Recommended System Pressure (cold) 21.7 p.s.i. / 1.5 bar
Domestic Hot Water
Max Mains Inlet Pressure 116 p.s.i. / 8 bar
Min Mains Water Pressure 2.9 p.s.i. / 0.2 bar
Min DHW Flow Rate (Can) 0.55 GPM / 2.5 l/min
(USA) 0.66 GPM / 2.5 l/min
Mains Inlet Connection 1/2” / 15.9 mm
DHW Outlet Connection 1/2” / 15.9 mm
Max DHW Temperature 149°F / 65°C
DHW Water Content (Can) 0.05 Gal / 0.23 l
(USA) 0.06 Gal / 0.23 l
2.3 COMPONENTS
Burner (15 blade) Stainless Steel
Main Heat exchanger Copper
DHW Heat exchanger Stainless Steel
Injectors natural gas (A) 1.28 mm
Injectors LPG gas (E) 0.90 mm
Pump Grundfos UPS 15-62/BX AO
Flue - Outer Duct Epoxy coated
Flue - Inner Duct Aluminium
Fan MVL RLG 97/3400 - 3030LH
Gas Valve SIT 845 SIGMA
Air Pressure Switch HUBA
Diverter Valve Baxi

6925.188.3 - GB
INSTRUCTIONS PERTAINING TO THE INSTALLER
2.4 INSTALLATION
Minimum Clearances for Servicing
Top 8.66 in / 220 mm
Bottom 9.84 in / 250 mm
Sides 1.77 in / 45 mm
Front 17.71 in / 450 mm
Flue Terminal Size Concentric System 3.93 in / 100 mm
Flue Terminal Size 2-Pipe Flue System 3.14 in / 80 mm
Flue Terminal Protruding 4.52 in / 115 mm
Lift Weight 88 lb / 40 kg
Dimensions Height 30.04 in / 763 mm
Width 17.71 in / 450 mm
Depth 13.78 in / 350 mm
Gas Connection 3/4”
Primary Water Content (Can) 0.33 Gal / 1.5 l
(USA) 0.40 Gal / 1.5 l
Air Duct Diameter 3.93 in / 100 mm
Flue Duct Diameter 2.36 in / 60 mm
Supply 120 V 60 Hz
Power Consumption 563 Btu /h - 165 W
Internal Fuse 3.15 A
Electrode Spark Gap 2.5 to 3.5 mm
2.5 GENERAL
2.6 ELECTRICAL
2.7 AVAILABLE PUMP HEAD FOR CENTRAL HEATING
This is a high static head pump t for installation on any type of single or double-pipe heating systems. The air vent valve
incorporated in the pump allows quick venting of the heating system.
Graph 1
WATER FLOW RATE (l/h)
PUMP HEAD (mH2O)
0711_2301
WATER FLOW RATE (gal/h)
PUMP HEAD (ft w.c.)

7925.188.3 - GB
INSTRUCTIONS PERTAINING TO THE INSTALLER
2.8 SYSTEM VOLUME
Based on 30 p.s.i. / 2.11 bar safety valve setting
Vessel charge and initial system pressure bar 0.5 1.0 1.5
psi 7.25 14.5 21.7
Total water content of system using 2.2 gal / 10 l Litres 120 91 64
capacity expansion vessel (Can) gal 26.4 20 14
supplied with appliance (USA) gal 31.7 24 16.9
For systems having a larger capacity MULTIPLY the TOTAL system capacity in litres (gallons) by 0.0833 0.109 0.156
the factor to obtain the TOTAL MINIMUM expansion vessel capacity required in litres (gallons)
Note: When the boiler is operating at maximum operating temperature, providing heating with all radiators operating, the
pressure gauge should not indicate more than 25.5 p.s.i. / 1.8 bar. If the reading exceeds this gure an additional expan-
sion vessel is required.
2.9 BOILER SCHEMATIC
Central Heating Mode (Fig. 1)
1. With a demand for heating, the pump circulates water through the primary circuit. At a pre-determined ow rate the
central heating ow switch operates, initiating the ignition sequence.
2. The main burner ignites at low rate, then the gas valve controls the gas rate to maintain the heating temperature mea-
sured by the temperature sensor.
3. When the ow temperature exceeds the setting temperature, a 3 minute delay occurs before the burner relights auto-
matically (anti-cycling). The pump continues to run during this period.
4. When the demand is satised the burner is extinguished and the pump continues to run for a period of 3 minutes (Pump
Overrun).
Central Heating Circuit
Key
1 Primary Heat Exchanger
2 Burner
3 Ignition Electrode
4 Flame Sensing Electrode
5 Gas Valve
6 Pump
7 Automatic Air Vent
8 Expansion Vessel
9 Plate Heat Exchanger
10 Flow Sensor with Filter
11 Boiler Drain Point
12 Pressure Relief Valve
13 Heating Return
14 Cold Water Inlet On/Off Valve and Filter
15 Gas Inlet
16 Domestic Hot Water Outlet
17 Heating Flow
18 Automatic By-Pass
19 Water Pressure Switch
20 Manometer
21 Domestic Hot Water Temperature Sensor
22 Three Way Valve
23 Three Way Valve Motor
24 Safety Thermostat
25 Central Heating Temperature Sensor
Fig. 1
0610_1201 / CG_1857

8925.188.3 - GB
INSTRUCTIONS PERTAINING TO THE INSTALLER
2.9.1 BOILER SCHEMATIC FOR 1.310 Fi MODEL
Operating Mode (Fig. 1.1)
1. With a demand for heating, the pump circulates water through the primary circuit. At a pre-determined ow rate the
central heating ow switch operates, initiating the ignition sequence.
2. The main burner ignites at low rate, then the gas valve controls the gas rate to maintain the heating temperature mea-
sured by the temperature sensor.
3. When the ow temperature exceeds the setting temperature, a 3 minute delay occurs before the burner relights auto-
matically (anti-cycling). The pump continues to run during this period.
4. When the demand is satised the burner is extinguished and the pump continues to run for a period of 3 minutes (Pump
Overrun).
Boiler Primary Circuit
Fig. 1.1
0610_1702 / CG_1859
Key
1 Primary Heat Exchanger
2 Burner
3 Ignition Electrode
4 Flame Sensing Electrode
5 Gas Valve
6 Pump
7 Automatic Air Vent
8 Expansion Vessel
9 Boiler Drain Point
10 Pressure Relief Valve
11 Boiler Return
12 Gas Inlet
14 Automatic By-Pass
15 Three Way Valve
16 Manometer
17 Boiler Flow
18 Three Way Valve
19 Three Way Valve Motor
20 Safety Thermostat
21 Temperature Sensor

9925.188.3 - GB
INSTRUCTIONS PERTAINING TO THE INSTALLER
Domestic Hot Water Mode (Fig. 2)
1. Priority is given to the domestic hot water supply. A demand at a tap or shower will override any central heating requi-
rement.
2. The ow of water will operate the DHW ow switch which requests the 3 way valve to change position. This will allow
the pump to circulate the primary water through the DHW plate heat exchanger.
3. The burner will light automatically and the temperature of the domestic hot water is controlled by the temperature
sensor.
4. When the domestic hot water demand ceases the burner will extinguish and the diverter valve will remain in the dome-
stic hot water mode, unless there is a demand for central heating.
Domestic Hot Water Circuit
Fig. 2
0610_1203 / CG_1858
Key
1 Primary Heat Exchanger
2 Burner
3 Ignition Electrode
4 Flame Sensing Electrode
5 Gas Valve
6 Pump
7 Automatic Air Vent
8 Expansion Vessel
9 Plate Heat Exchanger
10 Flow Sensor with Filter
11 Boiler Drain Point
12 Pressure Relief Valve
13 Heating Return
14 Cold Water Inlet On/Off Valve and Filter
15 Gas Inlet
16 Domestic Hot Water Outlet
17 Heating Flow
18 Automatic By-Pass
19 Water Pressure Switch
20 Manometer
21 Domestic Hot Water Temperature Sensor
22 Three Way Valve
23 Three Way Valve Motor
24 Safety Thermostat
25 Central Heating Temperature Sensor
Frost Protection Mode
1. Boilers electronic management includes a “frost protection” function in the central heating system which operates the
burner to reach a heating ow temperature of 30°C when the system heating ow temperature drops below 5 °C. This
function is enabled when the boiler is connected to electrical supply, the gas supply is on and the system pressure is as
required.
Pump Protection
1. In the event that no heat is required, the pump will automatically start up and operate for one minute during the fol-
lowing 24 hours. This function is operative when the boiler is powered.

10 925.188.3 - GB
INSTRUCTIONS PERTAINING TO THE INSTALLER
3. GENERAL BOILER INFORMATION
The boiler requires a gas rate of 128.1 ft3/h - 3.63m3/h.
The meter and supply pipes must be capable of delivering this quantity of gas in addition to the demand from any other
appliances in the house. The boiler requires at least a 3/4” gas supply pipe. The complete installation, including the meter,
must be tested for gas leak and purged.
3.1 GAS SUPPLY
WARNING :
If the heating is directly connected to a oor heating system, a safety overheating thermostat should be provided by the
installer.
3.4.1 CONCENTRIC SYSTEM
The ue assembly supplied for the boiler is 2.64 ft / 0.75 m in length + terminal.
For horizontal ues a minor deviation from the horizontal is allowable, provided it results in a downward slope towards
the terminal.
Additional ue components are available as follows:
3.28 ft / 1 m ue
90° bend
45° bend
Vertical ue terminal assembly. Refer to the separate installation instructions supplied with the assembly.
Notes: If an extra 90° bend is used, this reduces the maximum ue length by 3.28 ft / 1 m. Each 45° bend used reduces
the maximum ue length by 1.64 ft / 0.5 m.
Under no circumstances must the ue length (including allowances for extra bends) exceed 4 m / 13.12 ft.
The boiler requires a 120V 60Hz power supply. Ensure the electrical supply is polarised.
The boiler must be grounded.
There must only be one common isolator, providing complete electrical isolation, for the boiler and any external con-
trols.
Using PVC insulated cable 18 AWG x3C 105 °C.
All wiring must be installed in accordance with requirements of National Electrical Code and any additional national, state,
or local code requirements having jurisdiction. All wiring must be N.E.C. Class 1. Boiler must be electrically grounded in
accordance with the National Electrical Code, ANSI/NFPA No. 70-latest edition.
In Canada, installation must conform to CSA C22.1 Canadian Electrical Code Part 1 and any local codes.
3.2.1 Install Room Thermostat
Install room thermostat on an inside wall. Never install where it will be inuenced by drafts, hot or cold water pipes, lighting
xtures, television, sun rays or near a replace.
3.2 ELECTRICAL SUPPLY
The boiler does not require any air vents in the room in which it is installed, or when installed in a cupboard or compart-
ment.
3.3 AIR SUPPLY
3.4 FLUE SYSTEM