6302 4827 – 05/2003 US For Installers Installation and Maintenance Manual Indirect-fired Water Heaters Logalux LT135/2 – 300/2 Read these Instructions Carefully for Assembly and Maintenance
Foreword To these instructions This Installation and Maintenance manual contains important information regarding proper installation, operation and maintenance of the indirect fired domestic hot water tank series LT135/2 - 300/2 (DHW storage tank). The installation and maintenance instructions are directed at a licensed installing contractor with knowledge of accepted industry practices for the installation and maintenance of the equipment and various applications of the equipment involved.
Table of Contents 1 General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 1.1 Standards and Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 1.2 Tools, Materials and Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 2 Safety Considerations . 2.1 2.2 2.3 2.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 Application Purpose . . . . . . .
1 General Information 1 General Information 1.1 Standards and Guidelines Caution! Please observe the local and state requirements regarding equipment installation! NOTICE When installing the tank in the state of Massachusetts the installation must by done by a Massachusetts licensed plumber or contractor. 1.2 Tools, Materials and Test Equipment Standard tools and equipment from the HVAC industry are required for the installation.
Safety Considerations 2 Safety Considerations 2.1 Application Purpose 2 2.3 Observe the following Notices The LT135/2 - 300/2 are designed to be used for heating of domestic hot water. The tanks can only be heated using heating water and can only be used in closed systems. HEALTH DANGER Due to improper cleaning the domestic hot water can be contaminated. WARNING! TANK DAMAGE 2.
3 3 Product Description Product Description The LT135/2 - 300/2 indirect fired domestic hot water tanks are factory assembled with exception of screw-on feet (packaged with the boiler) and piping accessories (packaged in envelope with tank) to be installed in the field. 1 2 3 The major components of the tank are: – Tank vessel with corrosion protection Corrosion protection is provided by hygienic Buderus Thermoglaze "DUOCLEAN" as well as additional cathodic protection using a magnesium anode rod (Fig.
Technical Information 4 4 Technical Information 4.1 Dimensions and Connections 25¾ in. 25 ¾ in. 0.6 – 1 in. M Fig. 2 Dimensions and Connections M: Strap-on location for Logamatic/SP30D sensor AW: DHW Outlet EZ: DHW recirc connection/well for Honeywell aquastat VS: Boiler Water Supply EK: DHW Inlet RS: Boiler Water Return EL: Tank Drain EK/EL EZ Tank content Type Gal. LT135/2 36 LT160/2 42 LT200/2 53 LT300/2 79 VS/RS/AW NPT 1 NPT 1¼ Length L Weight1 In. Lbs.
5 5 Transportation and Placement Transportation and Placement NOTICE 5.1 The storage tank can be moved in its original packaging. This will protect the tank against possible damage. Moving the Tank on the Pallet Use suitable cart/dolly to move the tank. Secure the tank from tipping over. 2 NOTICE The tank can also be moved using a overhead crane. Cut out a portion from the top insulation and put hook through the lifting eye at the tank top.
Transportation and Placement 5.2 5 Moving the Tank Unpackaged You can easily move the tank when you attach three carrying pipe stubs (not supplied) to the tank. Remove the 4 front panel screws (Fig. 5). Remove front panel. Pull the front and bottom of the panel back. Remove insulating ring. Fig. 5 Remove front cover One carrying pipe stub (¾ NPT) for the front of the tank NPT¾ Screw a ¾“ coupling on a pipe end (Fig. 6, Item. 1). Tread coupling on front clean-out cover. 1 Fig.
6 Tank Installation 6 Tank Installation 6.1 Placement of the Tank min. 26 in. The tank is designed for horizontal installation and can serve as base for a Buderus boiler. For placement of the tank, observe the recommended clearance dimensions for proper access and service. (Fig. 8). Buderus requires maintaining a minimum clearance of 2" between hot water piping and combustible surfaces. Make sure that the floor is level and sufficiently strong.
Tank Installation 6.2 6 Installation of Water Piping Please observe the following warnings before piping the indirect tank. Follow these warnings carefully to ensure trouble free operation. The installation of the indirectfired hot water tank and all associated piping must be in accordance with all applicable codes and regulations. All work must be done by a licensed contractor. TANK DAMAGE In the domestic water connections AW, EZ and EK you will find protective inserts.
6 Tank Installation Install all domestic water piping according to local code and regulations. Do not install elbows in the tank drain piping to ensure easy flushing of the tank. 6.3 Installation of Temperature Sensor/Aquastat 6.3.1 Logamatic or Goldline SP30D control 1 When using a Buderus Logamatic control or Goldline SP30D control, the temperature sensor must be strapped to the front of the tank. Remove the front cover from the tank. (see Chapter 5.2, page 9).
Putting the Tank in/out of Operation 7 7 Putting the Tank in/out of Operation 7.1 Putting the Tank in Operation Prior to putting the tank in operation, check for leaks and correct immediately. 1 NOTICE Check for leaks on the tank using strictly domestic water. Maximum DHW test pressure can not exceed the pressure relief valve rating. Open the highest tap location, to vent the domestic water system. Open the cold feed to the tank (Fig. 13, Item. 1) to fill the tank.
7 7.2 Putting the Tank in/out of Operation Operating Notice CAUTION! 7.3 Taking out of Operation TANK DAMAGE TANK DAMAGE When the pressure/temperature relief valve is blocked or damaged, potential damage may occur to the tank and a very dangerous situation can develop. When the tank is kept empty for several days, localized corrosion can take place due to residual moisture. Make sure that the P and T relief piping Fig. 13, page 13) is NEVER blocked.
Maintenance 8 8 Maintenance It is recommended that a licensed contractor or service company checks and cleans the tank at least once every two years. For unfavorable water conditions, (hard or very hard), extreme high usage and/or high temperature, more frequent inspections and cleanings are recommended. TANK DAMAGE CAUTION! Due to improper maintenance and cleaning. 8.1 Perform the inspection and cleaning at least every two years. Correct any problems immediately.
8 8.2 Maintenance Cleaning the Tank Check the tank interior for lime deposits. SYSTEM DAMAGE Due to damaged tank surface scratching. CAUTION! Do NOT use sharp objects to clean the tank interior. 1 Follow the procedure below to properly clean the tank interior: Spray the interior surfaces with a high pressure cold water stream (ca. 58 – 72 psi) (Fig. 16). You can increase the effectiveness by circulating heated boiler water through the coil.
Maintenance 8 8.3.1 Visual Inspection of Anode Rod Check magnesium anode (Fig. 18, Item. 1) for decay. Replace anode rod, if the diameter is reduced to ½" to ¾". NOTICE Do not contaminate the surface of the rod with oil or grease. Keep the rod clean. 8.3.2 Check the Magnesium anode with multimeter Follow the outlined procedure: Remove one side of the grounding lead (Fig. 17, Item. 3) on the tank. Set multi-meter (MM) to DcmA (milli amps) 3 5 6 2 Connect black wire (Fig.
8 8.4 Maintenance Changing out the Anode 10 9 Remove the M8 nut (Fig. 18, Item. 10) to remove the ground cable (Fig. 18, Item. 8). 8 Remove M8 nut (Fig. 18, Item. 7). 7 Separate clean-out cover (Fig. 18, Item. 3) from the Magnesium anode rod (Fig. 18, Item. 1). 6 5 Replace Magnesium anode rod. 4 Install new rod including the small parts, as shown in Fig. 18. 3 2 1 Fig. 18 Changing out of the Magnesium anode rod Item. 1: Magnesium anode Item. 2: Gasket Item. 3: Clean-out cover Item.
Maintenance 8.5 8 Placing the Tank Back in Operation after Cleaning Install the clean-out cover together with magnesium anode (Fig. 19, Item. 1) back in the tank. Observe the orientation of the tank gasket. The word "Deckelseite" must be facing the clean-out cover. SYSTEM DAMAGE Due to defective gasket. CAUTION! We recommend using a new gasket (Fig. 19, Item. 2) when changing out the Magnesium anode to avoid a leakage at the tank. 5 Tighten hex head bolts (Fig. 19, Item. 4) by hand.
Heating Contractor: PRODUCTS MANUFACTURED BY BBT Thermotechnik GmbH 35573 Wetzlar www.buderus.de BBT North America Corporation 50 Wentworth Avenue Londonderry, NH 03053 Tel: 603-552-1100 ● Fax: 603-584-1681 www.buderus.net BBT North America Corporation reserves the right to make changes without notice due to continuing engineering and technological advances.
