Buderus Logalux SM300/1 Installation And Maintenance Manual
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Buderus Logalux SM300/1 Installation And Maintenance Manual

Solar and high capacity - domestic hot water
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Installation and
Maintenance Manual
Logalux SM300/1
Logalux SM400/1
Solar and High Capacity -
Domestic Hot Water
Documentation for the con-
tractor
Please read carefully prior
to installation and mainte-
nance
When the anode rod is not profes-
sionally and annually maintained, the
tank will lose its warranty. Annual
service records must be maintained
and shown in case of a warranty
claim along with an original proof of
purchase. Refer to page 23 to 27 for
annual maintenance instructions to
maintain tank warranty.

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Do you have a question about the Logalux SM300/1 and is the answer not in the manual?

Questions and answers

Paulos
May 13, 2025

I had a pipe leaking issue and a plumber changed a damaged valve controler and a pipe. And just before we turned on the boiller the boiler tunk looks like has no water.

0
1 comments:
Mr. Anderson
May 21, 2025

If the Buderus SM300/1 boiler tank appears to have no water after a valve controller and pipe replacement, the following steps should be taken:

1. Check the cold water feed valve to ensure it is open and supplying water to the tank.
2. Verify that the P & T valve discharge piping is free of obstructions.
3. Inspect the system for any closed shut-off valves that may be preventing water flow.
4. Open a high faucet or vacuum breaker to vent air and allow water to fill the tank.
5. Ensure the tank is not drained and check for leaks or improper reconnections during replacement.

If problems continue, contact a heating or service contractor.

This answer is automatically generated

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Summary of Contents for Buderus Logalux SM300/1

  • Page 1 Installation and Solar and High Capacity - Domestic Hot Water Maintenance Manual Logalux SM300/1 Documentation for the con- tractor Logalux SM400/1 Please read carefully prior to installation and mainte- nance When the anode rod is not profes- sionally and annually maintained, the tank will lose its warranty.

  • Page 2: Table Of Contents

    5.1.2 System start-up Decommissioning of the system 5.2.1 Shutdown of solar hot water tank 5.2.2 Shutdown of heating system in cold weather conditions 5.2.3 Environmental protection Logalux SM300/1 - SM400/1 - Technical specifications are subject to change without prior notice.
  • Page 3 V Use only original replacement parts. for the installation and maintenance of the equipment and various applications of the equipment involved. Logalux SM300/1 - SM400/1 - Technical specifications are subject to change without prior notice.

  • Page 4: Product Description

    V Dispose of packaging of the solar tank in an environ- mental friendly fashion. V A solar hot water heater that is being replaced must be disposed of in a suitable fashion. Logalux SM300/1 - SM400/1 - Technical specifications are subject to change without prior notice.
  • Page 5 Magnesium anode rod Smooth coil heat exchangers Dry well sensing port for heating system control Dry well sensing port for solar DHW Recirculation connection Tank feet Logalux SM300/1 - SM400/1 - Technical specifications are subject to change without prior notice.
  • Page 6 Tee piece with P & T relief valve Bracket for mounting of aquastat Spacer set for securing DHW tank sensor Cover cap for DHW recirc connection (EZ) Tee piece with tank drain valve Logalux SM300/1 - SM400/1 - Technical specifications are subject to change without prior notice.

  • Page 7: Product Description 4

    M1 Temperature measuring point for DHW temperature sensor (FB) or aquastat M2 Temperature measuring point for solar DHW sensor (FSS) Cold water feed Tank drain DHW recirc tapping Logalux SM300/1 - SM400/1 - Technical specifications are subject to change without prior notice.
  • Page 8 M2 Alternative location for DHW temperature sensor (FB) or shut-off sensor for loading by solid fuel boiler (FPU) M4 Temperature measuring point #2 for solar DHW sensor (FSS) Cold water feed Tank drain DHW recirc tapping Logalux SM300/1 - SM400/1 - Technical specifications are subject to change without prior notice.

  • Page 9: Technical Specifications

    3) Without water, includes packaging. 4) Every installation requires the use of a thermal expansion tank and pressure/temperature relief valve in the heating system and solar system. Logalux SM300/1 - SM400/1 - Technical specifications are subject to change without prior notice.

  • Page 10: Transportation

    V Strap the tank to the hand dolly. V Move the tank to its final location. V Remove only the tank packaging at the final installation site. Logalux SM300/1 - SM400/1 - Technical specifications are subject to change without prior notice.

  • Page 11: Transportation With Overhead Crane

    Recommended minimum clearances V Place tank on a level and sufficiently strong floor. (in inch/mm) V Remove plastic and packaging materials. Solar hot water heater Boiler Logalux SM300/1 - SM400/1 - Technical specifications are subject to change without prior notice.

  • Page 12: Tank Assembly

    V To measure and secure the DHW water temperature an installed temperature sensor or aquastat on the DHW tank is reqiured. Logalux SM300/1 - SM400/1 - Technical specifications are subject to change without prior notice.
  • Page 13 V Guide sensor wire to suitable control panel and use strain relief. The wiring cannot be in contact with hot boiler parts. Fig. 10 Installation of locking tab. Locking tab Dry well Logalux SM300/1 - SM400/1 - Technical specifications are subject to change without prior notice.
  • Page 14 V Secure aquastat [2] with 2 screws [1] to the mounting bracket. V Install aquastat cover in its place. Fig. 12 Installation of aquastat Sheet metal screws Aquastat Dry well Capillary Tension spring Logalux SM300/1 - SM400/1 - Technical specifications are subject to change without prior notice.

  • Page 15: Sm400/1 Placement And Installation

    M3 Solid fuel boiler on temperature M4 Temperature measuring point #2 for solar DHW sensor (FSS) M5 Temperature sensor location, to switch operation between a solid fuel boiler and gas/oil boiler Logalux SM300/1 - SM400/1 - Technical specifications are subject to change without prior notice.

  • Page 16: Installation Of Tank Insulation For Sm400/1 Tank

    Fig. 14 Insulation installation for SM400/1 tank Tank top cover Top insulation piece Cover of top of locking piece Front locking piece Short locking piece Insulation Bottom insulation disc Logalux SM300/1 - SM400/1 - Technical specifications are subject to change without prior notice.

  • Page 17: Water Side Piping Connections For Both Tank Models

    V Install piping connections without undue stress. V Install furnished tank fittings to their proper connec- tions. V Check all connections for leaks. Logalux SM300/1 - SM400/1 - Technical specifications are subject to change without prior notice.
  • Page 18 Tee piece with drain valve Water volume Max. coil input Minimum pipe size liter BTU/hr ¾" 200-400 53-103 198,000 Tab. 2 Sizing of the P & T valve discharge line Logalux SM300/1 - SM400/1 - Technical specifications are subject to change without prior notice.

  • Page 19: Connections For Solar Station Ks

    V Route the piping with a steady slope down from the air vent. Install an air vent where necessary at every air high point in the piping system. (Temperature range up to 302 °F/ 150 °C). Logalux SM300/1 - SM400/1 - Technical specifications are subject to change without prior notice.

  • Page 20: Connections For High Output Indirect Fired Tank Piping

    2 separate wiring terminals available. Please note that the maximum combined amp draw can NOT exceed 5 Amp. When using pumps with high amp draws, use isolation relays. Logalux SM300/1 - SM400/1 - Technical specifications are subject to change without prior notice.

  • Page 21: Start-Up And Shut-Down Of Tank

    V Inform the end user regarding annual maintenance pro- cedures to ensure a lifetime of trouble free operation. V Hand all installation documentation to the end user. Logalux SM300/1 - SM400/1 - Technical specifications are subject to change without prior notice.

  • Page 22: System Start-Up

    The components are easily separated and are clearly marked. In this manner the individual components are easily sorted and added into the recycling and dis- posal stream. Logalux SM300/1 - SM400/1 - Technical specifications are subject to change without prior notice.

  • Page 23: Maintenance

    V Remove the front cover and insulation disc of the inspection opening of the solar water heater. V Remove bolts of the clean-out cover. V Remove hand-hole cover, magnesium anode rod and hand hole gasket. Logalux SM300/1 - SM400/1 - Technical specifications are subject to change without prior notice.

  • Page 24: Cleaning Of Solar Hot Water Tank

    We recom- mend to have a professional perform the chemical clean- ing. Fig. 20 Spraying for cleaning of the solar hot water tank Logalux SM300/1 - SM400/1 - Technical specifications are subject to change without prior notice.

  • Page 25: Checking Of Magnesium Anode Rod

    V Check anode rod for surface irregularities and diame- ter. V When the diameter is reduced to ½" (15 mm), replace the anode rod. V Install the new anode rod back into the tank. Logalux SM300/1 - SM400/1 - Technical specifications are subject to change without prior notice.
  • Page 26 Fig. 22 Replacement magnesium anode rod. Magnesium anode Gasket Clean out cover Insulating sleeve Flat washer Lock washer Hex head nut M8 Ground wire eyelet Lock washer M8 nut Logalux SM300/1 - SM400/1 - Technical specifications are subject to change without prior notice.

  • Page 27: Placing Solar Tank Back In Operation After Cleaning

    (Æ Fig. 1, page 5). Fig. 23 Installation of inspection cover. Inspection opening Clean-out cover gasket Magnesium anode rod Clean-out cover Hex head bolts Insulation piece Clean-out cover and screws Logalux SM300/1 - SM400/1 - Technical specifications are subject to change without prior notice.

  • Page 28: Replacement Parts

    Scored insulation Magnesium anode rode Mounting bracket for aquastat 5592176 Front magnesium anode rod Tab. 3 Available spare parts for solar hot water heater SM300/1 - SM300/1W Logalux SM300/1 - SM400/1 - Technical specifications are subject to change without prior notice.
  • Page 29 Replacement Parts 7747102527.aa.RS-Solarspeicher SS300/SM300 USA Fig. 24 Solar Hot Water Heater SM300/1 - SM300/1 W Logalux SM300/1 - SM400/1 - Technical specifications are subject to change without prior notice.

  • Page 30: Access Cover And Anode Rod Assembly For Sm300/1 - 300/1W

    Insulation sleeve for anode Flat washer Lock washer Hex head nut Tab. 4 Available spare parts for tank access cover and anode for SM300/1 - SM300/1W tanks Logalux SM300/1 - SM400/1 - Technical specifications are subject to change without prior notice.

  • Page 31: Replacement Parts For Sm400/1

    Access cover mounting bolts M10 x 30 8.8 63004276 1-½" Tank drain plug with gasket 5592176 Magnesium anode rode 33x400 Tab. 5 Available spare parts for solar hot water heater SM400/1 Logalux SM300/1 - SM400/1 - Technical specifications are subject to change without prior notice.
  • Page 32 Replacement Parts 7747102531.aa.RS-Speicher-WE SM400 USA Fig. 25 SM400/1 Solar Hot Water Heater Logalux SM300/1 - SM400/1 - Technical specifications are subject to change without prior notice.

  • Page 33: Tank Access Cover And Anode Rod Assembly For Sm400/1

    Flat washer 7079410 Grounding strap of anode rod Washer 63014368 Tank access cover Tab. 6 Available spare parts for access cover and anode rod for SM400/1 tank Logalux SM300/1 - SM400/1 - Technical specifications are subject to change without prior notice.
  • Page 34 Replacement Parts 7747102529.aa.RS-Handlochdeckel und Anode SS300/SM300 USA Fig. 26 Tank access cover and anode rod assembly for SM400/1 tank Logalux SM300/1 - SM400/1 - Technical specifications are subject to change without prior notice.

  • Page 35: Tank Jacket System For Sm400/1 Tank

    Additional small insulation pieces Consisting of: 4 soft foam pieces D50 x 80 1 Soft foam piece 75x75x75 Tab. 7 Available spare parts for solar hot water heater SM400/1 Logalux SM300/1 - SM400/1 - Technical specifications are subject to change without prior notice.
  • Page 36 Replacement Parts 7747102530.aa.RS-Verkleidung SM400 USA Fig. 27 Complete tank jacket panel and insulation set for SM400/1 Logalux SM300/1 - SM400/1 - Technical specifications are subject to change without prior notice.
  • Page 37 Notes Logalux SM300/1 - SM400/1 - Technical specifications are subject to change without prior notice.
  • Page 38 Notes Logalux SM300/1 - SM400/1 - Technical specifications are subject to change without prior notice.
  • Page 39 Notes Logalux SM300/1 - SM400/1 - Technical specifications are subject to change without prior notice.
  • Page 40 Bosch Thermotechnology Corp. 50 Wentworth Avenue Londonderry, NH 03053 Tel. 603-552-1100 Fax 603-584-1681 www.buderus.net Products manufactured by Bosch Thermotechnik GmbH D-35573 Wetzlar www.buderus.de Bosch Thermotechnology Corp. reserves the right to make changes without notice due to continuing engineering and technological advances.

This manual is also suitable for:

Logalux sm400/1

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