Baxi LUNA HT 280 Installers And Users Instructions
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Baxi LUNA HT 280 Installers And Users Instructions

Baxi LUNA HT 280 Installers And Users Instructions

Wall-mounted condensing boilers
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Wall-mounted condensing boilers
HT
Installer's and User's Instructions
0085
BAXI
, one of the leading European enterprises to produce central heating and hot water devices for domestic use (wall-mounted gas-operated
S.p.A.
boilers, floor-standing boilers and electrical water-heaters) has obtained the CSQ certificate of conformity to the UNI EN ISO 9001 norms. This
certificate guarantees that the Quality System applied at the BAXI
factory in Bassano del Grappa, where your boiler was produced, meets
S.p.A.
CERTIFICAZIONE DEI SISTEMI
the standards of the UNI EN ISO 9001 norm, which is the strictest and concerns all organization stages and operating personnel involved in the
QUALITA' DELLE AZIENDE
production and distribution processes.
UNI EN ISO 9001

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  • Page 1 floor-standing boilers and electrical water-heaters) has obtained the CSQ certificate of conformity to the UNI EN ISO 9001 norms. This certificate guarantees that the Quality System applied at the BAXI factory in Bassano del Grappa, where your boiler was produced, meets S.p.A.
  • Page 2 Do not leave any parts of the packaging (plastic bags, polystyrene, etc.) within childrenʼs reach as they are a potential source of danger. BAXI boilers bear the CE mark in compliance with the basic requirements as laid down in the following Directives:...

  • Page 3: Table Of Contents

    Contents Instructions pertaining 1. Instructions prior to installation to the user 2. Instructions prior to commissioning 3. Commissioning of the boiler 4. Filling the boiler 5. Turning off the boiler 6. Prolonged standstill of the system. Frost protection 7. Gas change 8.

  • Page 4: Instructions Prior To Installation

    Instructions pertaining to the user 1. Instructions prior to This boiler is designed to heat water at a lower than boiling temperature at atmospheric pressure. installation The boiler must be connected to a central heating system and to a domestic hot water supply system in compliance with its performances and output power.

  • Page 5: Commissioning Of The Boiler

    3. Commissioning of the To correctly light the burner proceed as follows: boiler 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. Figure 1 KEYS DISPLAY SYMBOLS...
  • Page 6 Dash “Automatic mode” active Figure 2 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”; Manual operation at the maximum temperature set. The boiler comes into operation regardless of the timed program set.
  • Page 7 3-3. Setting the maximum central heating temperature Press the key (2-figure 1) to set the central heating water temperature; Press the keys to set the temperature required; press either of the keys (1 or 10 - figure 1) to save and return to the main menu. N.b –...
  • Page 8 3-7. Table of user-settable parameters Parameter Factory Parameter description Range setting ———- Time of day setting 0…23:59 Minimum central heating temperature setting (°C) 25..80 Start of first daily period of automatic central heating 6:00 00:00…24:00 22:00 End of first daily period of automatic central heating 00:00…24:00 Start of second daily period of automatic central heating 0:00...
  • Page 9 Fault warnings appear on the secondary display (figure 1 b) alternating with the time, both of them flashing (figure 4.1). It is not possible to reset malfunction warnings which appear on the secondary display as the cause of the alarm has first to be removed. Figure 4.1 3-9.

  • Page 10: Filling The Boiler

    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 Qualified Service Engineer. LUNA HT 280 - HT 330 Boiler drain valve Boiler filling tap Figure 5a LUNA HT 1.120 - HT 1.240 - HT 1.280...

  • Page 11: Gas Change

    6. Prolonged standstill We recommend you avoid draining the whole system as water replacements engender purposeless of the system. and harmful limestone deposits inside the boiler and on the heating elements. Frost protection In case the boiler is not operated during wintertime and is therefore exposed to danger of frost we suggest you add some specific-purpose anti-freeze to the water contained in the system (e.g.: propy- lene glycole coupled with corrosion and scaling inhibitors).

  • Page 12: General Information

    Instructions pertaining to the installer 9. General information The following remarks and instructions are addressed to Service Engineers to help them carry out a faultless installation. Instructions regarding lighting and operation of the boiler are contained in the ʻInstructions pertaining to the userʼ section. Note that installation, maintenance and operation of the domestic gas appliances must be performed exclusively by qualified personnel in compliance with current standards.

  • Page 13: Boiler Installation

    to remove sludge and contaminants, using suitable proprietary products as described in section 2.1. 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 makerʼs directions.

  • Page 14: Fittings Present In The Packaging

    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 of 100 Pa.
  • Page 15 Flue duct terminal Max. length Each 90° bend Each 45° bend Flue Outer of flue duct reduces the duct reduces the duct terminal terminal max. length by max. length by diameter diameter Coaxial Ø 60/100 mm 10 m 0,5 m 100 mm 100 mm Vertical two-pipe...
  • Page 16 Vertical flue terminal Ø 60/100 mm installation options This type of installation can be carried out both on a flat or pitched roof by fitting a terminal, an appropriate weathering tile and sleeve, (supplementary fittings supplied on demand). L max = 10 m L max = 10 m L max = 8 m L max = 9 m...
  • Page 17 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 horizontal flue terminals installation options IMPORTANT: Ensure a minimum downward slope of 1 cm toward the outside per each metre of duct length Make sure that the exhaust and intake ducts are securely fixed to the walls.

  • Page 18: Connecting The Mains Supply

    Separated vertical flue terminals installation options L max = 14 m L max = 15 m Important: if fitting a single exhaust flue 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 fittings refer to the technical data accompanying the fittings.
  • Page 19 15-1. Description of the electrical connections to the boiler Turn the control box downward to access terminal boards M1 and M2 used for the electrical connec- tions by removing the two protective covers (see figure 11). Terminals 1-2: connection of SIEMENS model QAA73 temperature regulator supplied as accessory. Connection polarity is irrelevant.
  • Page 20 Parameter Range Default value Line no. HC1 gradient 2.5…40 Selection of central heating circuit temperature curve “kt” HC1 max. output 25…85 Central heating system maximum output temperature Type of building Light, Heavy Light Room compensation on HC1 Activation/deactivation of the influence of the room temperature. on HC2 On HC1 If it is deactivated, the outdoor temperature sensor must be...

  • Page 21: Setting The Boiler Parameters

    15-3. Connecting the outdoor temperature sensor probe The SIEMENS model QAC34 outdoor temperature sensor probe (optional accessory) must be con- nected to terminals 7-8 of terminal board M2 in figure 11. The procedures for setting the gradient of the temperature curve “kt” vary depending on the acces- sories connected to the boiler.
  • Page 22 c) with AGU2.500 for control of a low temperature system: Refer to the instructions provided with the AGU2.500 accessories for connection and control of a low temperature zone. 15-4. Connecting a zoned system The electrical connection and settings needed to control a system divided into zones vary depending on the accessories connected to the boiler.
  • Page 23 15-5. Connecting a remote water heater (for LUNA HT 1.120 - 1.240 - 1.280 models) LUNA HT 1.120 - 1.240 - 1.280 models are designed for connection of a remote water heater since they are fitted in the factory with a motor-operated three-way valve. Make the water connections to the water heater as shown in figure 13.
  • Page 24 16. Gas change The gas change modalities is different depending on the kind of gas valve installed: modalities gas valve SIEMENS model VDU 11 (figure 14); gas valve SIGMA model 848 (figure 14a). Carry out the following operations in the given sequence: 1) calibration of the maximum heat output.
  • Page 25 9,8% Gas nozzle 12,0 mm 12,0 mm Table 1a LUNA HT 1.240 G20 - 2H - 20 mbar G31 - 3P - 37 mbar LUNA HT 280 max. heat output 8,7% min. heat output 8,4% 9,5% Gas nozzle 7,5 mm...
  • Page 26 LUNA HT 280 Gas consumption at 15 °C G20 - 2H - 20 mbar G31 - 3P - 37 mbar 1013 mbar 34.02 MJ/m 46.3 MJ/kg Consumption at max. heat output 3.06 m 2.25 kg/h Consumption at min. heat output 0,95 m 0.70 kg/h...
  • Page 27 17. Setting the boiler The boiler parameters may only be modified by professionally qualified staff proceeding as follows: parameters a) press the , keys on the boilerʼs front panel together for about 3 s until the parameter H90 appears on the display; b) press the keys to select the parameter for modification;...

  • Page 28: Control And Operation Devices

    Parameter N LUNA HT 280 LUNA HT 330 LUNA HT 1.120 LUNA HT 1.240 LUNA HT 1.280 H536 4900 4550 5850 5900 4550 H552 Table 4 If the electronic circuit board is replaced, make sure that the parameters set are those specific to the boiler model, as indicated in the documentation available from the authorised Service Centre.

  • Page 29: Positioning Of The Ignition And Flame Sensing Electrode

    19. Positioning of the ignition and flame sensing electrode Figure 16 20. Check of combustion To measure combustion performance and hygiene levels of combustion products, the forced draught parameters boiler models are equipped with two test points on the tapered coupling specifically designed for this purpose.

  • Page 30: Output / Pump Head Performances

    The stainless steel plate-type DHW heat exchanger is easily disassembled with a screwdriver by DHW heat exchanger operating as described below: (LUNA HT 280 - HT 330) • drain, if possible, only the boiler system, through the drain tap; • drain the DHW system from water;...

  • Page 31: Cleaning The Cold Water Filter

    The boiler is equipped with a cold water filter placed on the hydraulic assembly. To clean it do the water filter following: (LUNA HT 280 - HT 330) • drain the DHW system from water. • unscrew the nut on the flow sensing assembly (Figure 19).

  • Page 32: Boiler Schematic

    26.1 Boiler schematic LUNA HT 280 - HT 330 heating domestic water domestic water heating inlet outlet inlet return Figure 20 Legende: 19 flame detector electrode heating delivery cock 20 main burner gas service cock 21 ignition electrode boiler filling tap 22 air/gas mixture header cold water inlet on/off valve and filter...
  • Page 33 26.2 Boiler schematic LUNA HT 1.120 - HT 1.240 HT 1.280 heating storage domestic water heating inlet tank feed inlet return Figure 21 Legende: 22 air/gas mixture header heating delivery cock 23 mixer with venturi gas service cock 24 gas diaphragm boiler filling tap 25 fan heating return cock...

  • Page 34: Illustrated Wiring Diagram

    27.1 Illustrated wiring diagram LUNA HT 280 - HT 330...
  • Page 35 27.2 Illustrated wiring diagramLUNA HT 1.120 - HT 1.240 - HT 1.280...

  • Page 36: Technical Data

    IPX5D (*) according to EN 625 (**) according to EN 60529 BAXI , in its commitment to constantly improve its products, reserves the right to alter the specifications contained herein at any time and without previous warning. S.p.A. These Instructions are only meant to provide consumers with use information and under no circumstance should they be construed as a contract with a third party.

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