Alde Comfort 2923-2928 Service Manual
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Alde Comfort 2923-2928 Service Manual

Lpg boiler
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Summary of Contents for Alde Comfort 2923-2928

  • Page 1 Servicemanual Comfort 2923-2928...

  • Page 2: Table Of Contents

    This service manual is intended to assist with servicing and fault-finding in caravans, motor caravans and sheds equip- ped with Alde’s LPG boilers, types 2923 and 2928. The handbook may also be of assistance in ordering spare parts, in understanding how the boilers operate, and how they are installed. It also includes general information on how our heating systems are designed, and some information on LPG and LPG installations.

  • Page 3: 1:0 About The Alde Heating System

    To make refilling simpler, use Alde’s filling pump (fig 3) which both fills and bleeds the system automatically. Convectors...

  • Page 4: 2:0 About Lpg

    LPG burners normally work at a lower pressure than that in the cylinder. Alde’s LPG boilers work at a pressure of 28/37 mbar. This reduction in pressure is achieved by passing the LPG through a reduction valve, which is screwed on top of the LPG cylinder, or on to an automatic LPG connector.

  • Page 5: 3:1 Technical Data

    ABout CoMFoRt LPG BoILeRs 2923 & 2928 Boiler layout (fig 9): Fig 7. Fig 9 (Comfort 2923). At the bottom of the LPG burner 2923 there is an inlet pipe Exhaust which feeds in air from outside to the combustion chamber gases (fig 7). On the LPG boiler 2928, the air is led from the top of the flue via a hose down to the combustion chamber Flue (fig 8).

  • Page 6: 4:0 Flow Chart

    :0 FlOW ChARt LPG Boiler Circulation pump output electrical cartridge 12 V 12 V 12 V Fuse Fuse Fuse ON/OFF ON/OFF Micro- Room Room switch thermostat thermostat Ignition Switch Switch transformer Switch Switch Spark plug 12 / 230 V 1 kW / 2 kW Relay on 12 V Circuit el. cartridge Circula- board on for 230 V tion pump el.

  • Page 7: 5:0 Fault-Finding

    :0 FAult-FInDIng - If the ignition transformer produces a spark (click), but there is no spark at the spark plug, first check the ignition :1 gEnERAl FAult-FInDIng cable by removing it from the spark plug and making This guide to general fault-finding should be useful in a connection approx.

  • Page 8: 5:5 Pilot Burner Does Not Light

    : PIlOt BuRnER DOES nOt lIght - Check the operation of the overheating protection by measuring voltage between points 1 and 3 (there is a Cause: voltage drop of approx. 5 mV compared with points 1 and - No ignition spark at the pilot burner. 2). If a measuring instrument is not available, short circuit - Gas supply absent or too little.

  • Page 9: 5:9 The Boiler Overheats The Water

    Cause: ter hole diameter on the burner screen (can be ordered - The main burner does not ignite/burns with insufficient after discussion with Alde service). output. - Adjust the modulating screws on the automatic unit by - Main burner goes out (breaks) too early.

  • Page 10: 10 5:15 Noise Or Vibration In Circulation Pump

    :1 CIRCulAtIOn PumP DOES nOt StARt 5:15 NoIse oR vIBRAtIoN IN CIRCuLAtIoN PumP Cause: Cause: - No voltage to boiler. - Switch on room thermostat off. - Wear in motor/bearing - bearing dry. - Temperatures setting too low (room thermostat has trip- - Rubber coupling between motor and pump shaft faulty. ped). - Pump shaft bent.

  • Page 11: 11 6:1 Replacing The Complete Burner Unit

    Attach the hose, open the gas pipe NOTE! Work on the automatic gas unit may only be and test-run the boiler. Check that sparks cease when carried out by Alde’s service department or authorised the boiler lights! personnel. :1 REPlACIng thE COmPlEtE BuRnER unIt 1.

  • Page 12: 12 6:2 Adjusting The Boiler Temperature

    : ADjuStIng thE BOIlER tEmPERAtuRE RePLACING tHe oveRHeAtING PROtECtIOn 1. Remove the hatch on the control panel by opening it straight out and carefully bending it in the middle so that 1. Remove the lower front plate (see fig 12). the pegs are released (se Chapter 6:12). .

  • Page 13: 13 6:4 Replacing The Thermo-Element

    : REPlACIng thE thERmO-ElEmEnt . Insert the burner unit into the boiler and install it in accordance with Chapter 7:1. Check that the capillary 1. Remove the burner unit in accordance with Chap. 6:1. tube to the boiler thermostat, the temperature limiter . Slacken the nut (fig 21 A) a few turns and pull the and ignition cable are aligned correctly, to the right of thermo-element (fig 21 B) down out of the holder.

  • Page 14: 14 6:7 Replacing The Main Burner

    :7 REPlACIng thE mAIn BuRnER RePLACING tHe IGNItIoN tRANsFoRMeR 1. Remove the burner unit in accordance with Chap. 6:1. Ignition transformer 2923 119 replaces with 2923 125. . Remove the pilot burner in accordance with Chap. 6:6. 1. Switch off the main power switch or remove the fuse . Slacken the nut on the gas pipe below the main burner on the panel.

  • Page 15: 15 6:11 Replacing The Hatch

    :10 REPlACIng/ADjuStIng thE mICRO- FIg 8 swItCH (Not 2923 980 oCH 2928 980) 1. Remove the hatch in accordance with Chapter 6:11. . Remove the lower front plate (see fig 12). Position of micro- . Switch off the main power switch or remove the fuse on switch at start position the control panel. Set the thermostat knob in the ignition position.

  • Page 16: 16 6:12 Replacing The Panel

    :1 REPlACIng thE PAnEl :1 REPlACIng thE COntROl BOx 1. Remove the hatch in accordance with Chapter 6:11. 1. First remove the panel in accordance with . Switch off the main power switch. Chap. 6:12. (1-5). . Remove the lower front plate (see fig 12). . Set the thermostat knob in the ignition position. Remove .

  • Page 17: 17 6:14 Replacing A Complete Control Box With

    :1 REPlACIng A COmPlEtE COntROl 6:15 RePLACING tHe 12v CIRCuLAtIoN BOx WIth PAnEl PumP 1. Remove the hatch (6:11) and front plates (see fig 12). 1. Remove the upper front plate (see fig 12). . Switch off the main power switch and set the thermostat . Disconnect the connection cables (fig 36 A) on the top knob in the ignition position.

  • Page 18: 18 6:17 Replacing The Expansion Chamber

    :17 REPlACIng thE ExPAnSIOn :18 CAlIBRAtIng thE ROOm thERmOStAt vesseL 1. Check the temperature in the caravan with an accurate 1. Drain the heating system of approx. 2 litres of liquid. thermometer. . Remove the upper front plate (see fig 12). . Remove the cover by pressing in the clip on the left side .
  • Page 19 CIRCuIt dIAGRAM 2923 & 2928...

  • Page 20: 20 8:0 Exploded View 2923

    exPLoded vIew 2923...

  • Page 21: 21 9:0 Exploded View 2928

    exPLoded vIew 2928 0 39...

  • Page 22: 10:0 Exploded View 2923 / 2928 980

    10:0 exPLoded vIew 2923 / 2928 980...

  • Page 23: 11:1 Article Numbers To Exploded View

    11:1 ARtICLe NuMBeRs to exPLoded vIew 2923 page 20 2928 page 21 no Part.no Designation no Part.no Designation 1. 2923 154 Front plate upper complete 1. 2923 154 Front plate upper complete . 2923 111 Hatch . 2923 111 Hatch . 2923 153 Front plate lower complete . 2923 153 Front plate lower complete . 2930 423 Plastic nut . 2930 423 Plastic nut . 2920 410 Circulation pump complete (Dunker) . 2928 405 Circulation pump complete (Airpax) . 2930 410 Expansion vessel complete...

  • Page 24: 11:2 Article Numbers To Exploded View

    11:2 ARtICLe NuMBeRs to exPLoded vIew 2923 / 2928 980 page 22 no Part.no Designation 1. 2920 131 Front plate upper complete . 2920 181 Front plate lower complete . 2930 423 Plastic nut . 2928 410 Circulation pump complete . 2930 413 Expansion vessel complete . 2921 125 Wiring with connector 7. 2923 410 Panel complete (4 switches) 8. 2921 215 ON-OFF 2921 219 ON-OFF-ON 9. 2920 215 Control box 10. 2920 270 Gas valve compl.
  • Page 25 1:0 SPARE PARtS 2923 500 Burner unit 2923 and 2928 2923 400 Burner unit 2923 980 and 2928 980 1. 2921 216 Ignition transformer compl.2923 980 1. 2920 230 Overheating protection. and 2928 980 2. 2923 207 Spark plug. 2. 2923 225 Ignition transformer compl. 2923 and 2928 3. 2923 201 Pilot burner. 3.
  • Page 26 1:0 SPARE PARtS 1. 2923 210 Panel compl. 1. 2923 112 Control box. 2. 2923 200 Control box compl. 2. 2923 111 Hatch 3. 2921 217 Fuse 1 A. 4. 2923 115 Ignition lamp 1. 2921 215 Switch ON-OFF. 2. 2921 219 Switch ON-OFF-ON.
  • Page 28 Alde International Systems AB Wrangels allé 90 • Box 11066 • S-291 11 Färlöv • Sweden Tel +46 (0)44 712 70 • Fax +46 (0)44 718 48 • www.alde.se • info@alde.se...

This manual is also suitable for:

Comfort 2923Comfort 2928

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