Buderus 21 Design Manual
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Buderus 21 Design Manual

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Panel Radiators
Design Manual
For Buderus Panel Radiator models:
- Model 21
- Model 22
- Towel Warmers

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Summary of Contents for Buderus 21

  • Page 1 Panel Radiators Design Manual For Buderus Panel Radiator models: - Model 21 - Model 22 - Towel Warmers...
  • Page 2 Panel Radiator Design Manual Panel Radiator Design Manual | 12.2009 Technical specifications are subject to change without prior notice...

  • Page 3: Table Of Contents

    General Info Safety 3 Product Description 4 Mounting Guidelines 5 Radiator Output Ratings 6 Radiator Selection Procedure 7 Piping Arrangements 8 Buderus NB Style Towel Racks Panel Radiator Design Manual | 12.2009 Technical specifications are subject to change without prior notice...
  • Page 4 Panel Radiator Design Manual Panel Radiator Design Manual | 12.2009 Technical specifications are subject to change without prior notice...

  • Page 5: General Information

    This manual describes the basic operation of the Buderus panel radiators and towel racks, thermostatic controls and piping accessories. It also provides rough in dimensions and installation procedures.

  • Page 6: Safety

    2.2. Please follow these instructions Only use original Buderus spare parts. Damage caused by the use of parts not supplied by Buderus is excluded from the Buderus warranty. 2.3. Tools, materials and accessories For the installation of panel radiators and towel racks, you will need standard tools used for central heating, boiler and DHW water systems.

  • Page 7: Product Description

    These layers are combined and arranged into two basic models: Radiant Heat vs. Convection Heat: model # 21 (width 2.5"), model # 22 (width 4.0"). Forced hot air or baseboard systems with fin tubes Standard equipment with each radiator include wall...
  • Page 8 Design Manual Buderus Towel Warmers Nothing is more comforting than a warm towel after a Model 22 Table 2 bath or shower. European towel warmers from Buderus Dimensions Dry weight Water volume are the perfect combination of contemporary styling and economical luxury.

  • Page 9: Mounting Guidelines

    Design Manual Radiator Accessories Piping Connections Buderus offers a variety of accessories for installation Each stocking radiator has 20 mm (approx. 3/4) metric and control of the radiators for different piping male tappings on the bottom on one side. The radiator arrangements.
  • Page 10 Panel Radiator Design Manual Part no. 013G81013 Part no. 1016311 Single Valve, angled Straight Diverter Valve with adjustment w/ isolation valves for facing down for towel panel radiators racks; Head can be replaced with thermostatic head #013G8250 or Part no. 1016362 Straight Crossover Part no.
  • Page 11 Single Valve, angled with adjustment at the front for towel isolation valves for racks; Head can be replaced with thermostatic head panel radiators #013G8250 or #82721124 Part no. 82721124 Part no. 82721180 Buderus Thermostatic Buderus Thermostatic Head for panel Head w/ remote radiators and towel sensor for panel racks radiators and towel racks - capillary 79"...
  • Page 12 Floor Brackets for panel radiators Table 4 Floor Brackets Part Number Model numbers: 22 817-BUD Model numbers: 21 817-BUD-1 Optional covers for brackets 81606400 Flow Setter Valve: Each radiator is equipped with a flow setter valve mounted on the same side as the water connections of the panel radiator.
  • Page 13 TO RADIATOR FROM RADIATOR Straight (part number 1016311) and angled (part number 1016312) diverter valves are available from Buderus for use in a one-pipe system (fig. 4). Shut offs are located on ISOLATION the supply and return branches to the radiator, allowing to...
  • Page 14 Panel Radiator Design Manual Thermostatic Sensor head: Adding a Buderus Thermostatic Head enables room-by- room zone control for optimum comfort and efficiency. It is easily installed on the flow setter valve. A thermostatic head with remote sensor is available for...

  • Page 15: Mounting Guidelines

    Mounting Guidelines Panel Radiator Installation Model 21 and 22: Wall Mounting Both model 21 and 22 radiators can be wall or floor Each bracket is supplied with a slotted plastic locating mounted. All wall brackets must be secured to studs or clip.
  • Page 16 Return Supply tapings Panel Radiator 2½" 2" 1³/ " TOP VIEW Fig. 8 Model 21 Panel Radiator Rough in Dimensions in inches for wall mounting Stud Finished wall 1⁹/₁₆" 3⅜" from Minimum of Minimum Bracket Bracket finished 4"...

  • Page 17: Radiator Output Ratings

    If none of them applies, use Figure 10 and Table 9 to determine output based on individual requirements. Tables 7 and 8 show the outputs of Model 21 and 22 in-stock radiators at four different water temperatures. Use the high temperature column if restricted in wall space.
  • Page 18 Panel Radiator Design Manual Model 22: 4" (100mm) deep Table 8 Output BTU/hr Supply 194°F (90°C) 176°F (80°C) 158°F (70°C) 140°F (60°C) Part Number Delta T 36°F (20°C) 36°F (20°C) 18°F (10°C) 18°F (10°C) 1600 1300 1100 3-21216 12"x16"x4" 2400 1900 1700 1200...
  • Page 19 Applications manual Panel Radiator Design Manual If tables 7 and 8 do not match a system‘s requirements, the following guidelines provide means to calculate the effects of ambient room temperature, supply water temperature and temperature drop through the radiator on the radiator output. Ambient room temperature effect: The (adjusted) output of a radiator at any room temperature (∆T room) can be computed from the output listed at a room...
  • Page 20 Panel Radiator Design Manual Example: Compute the output of a Model 21 20” x 59” radiator with an average water temperature of 140°F (60°C) in the radiator and a room temperature of 70°F (21°C). Solution: Listed output = 7,000 Btu/hr (See Table 9) ∆T = 140 - 70 = 70°F: Conversion Factor = 0.569 (See...

  • Page 21: Radiator Selection Procedure

    | 21 Panel Radiator Design Manual | 12.2009 Technical specifications are subject to change without prior notice...

  • Page 22: Piping Arrangements

    Panel Radiator Design Manual Piping Arrangements One-Pipe System Options Figure 11 presents three different one-pipe The design of a panel radiator based heating system arrangements. In any one-pipe system, a single pipe involves selection of a piping system, pipe sizes, overall connects all radiators together.
  • Page 23 Applications manual Panel Radiator Design Manual Option 3: Multiple one-pipe systems. Options 2 and 3 above can be installed in a multiple loop following the guidelines in Table 10. Refer to the Pressure fashion where several one-pipe systems are connected Drop Curves (Fig.
  • Page 24 Panel Radiator Design Manual Table 11 Design procedure for One-Pipe System with Select Room 1 Room 2 Room 3 Room 4 monoflow tees or diverter valves room sequence 1. Select radiator hook-up sequence. Heat load 2. Determine individual heat loads. per room 3.
  • Page 25 Applications manual Panel Radiator Design Manual Example: One-Pipe System Layout Results: Output/ft Radiator Models Design a one-pipe system for a second floor with individual room temperature control: Bedroom Supply Temp = 180°F (82°C) 1500 Btu/ft #22 20” M. Bedroom Supply Temp = 176°F (80°C) 1125 Btu/ft Table 12 #22 x 12 Description...
  • Page 26 Panel Radiator Design Manual Two-Pipe System Options Figure 12 illustrates two common two-pipe configurations. Option 4: Two-Pipe Direct Return System Option 5: Two-Pipe Reverse Return System Pressure Bypass Valve Drawing not to scale Fig. 12 Two-pipe System Options Benefits of Two-Pipe Systems: Requirements for Two-Pipe System: 1.
  • Page 27 Applications manual Panel Radiator Design Manual Design Procedure for Two-Pipe System Table 14 1. Determine individual heat loads. Select Room 1 Room 2 Room 3 Room 4 room 2. Select desired overall temperature drop of systems sequence (∆T); i.e. 20°F (11°C), 30°F (17°C) or 40°F (22°C). Heat load 3.
  • Page 28 Panel Radiator Design Manual Example 2: Two-pipe System Lay-out Table 16: Radiator Option Determination Chart: Two-Pipe Design and select a two pipe panel radiator system with System the following requirements: Table 16 Table 15 Descrip- Heat BTU/ Selected No. and Flow- tion Load...
  • Page 29 Applications manual Panel Radiator Design Manual Balancing the system Piping Lay-out Suggestions: Initial settings of flow setter valves will help to 1. For small systems, use one-pipe system with ensure proper flow through all radiators. monoflow tees or diverter valves. Keep in mind that this is only a starting point and that the system may require further Btu’s per loop:...
  • Page 30 Panel Radiator Design Manual Pressure drop curves: Settings on flowsetter 0.05 0.08 0.1 0.3 0.4 0.5 0.6 0.7 0.9 1 BTU/Hr T = 20°F (10°C) 1,000 2,000 5,000 10,000 BTU/Hr T = 30°F (15°C) 1,500 3,000 7,500 15,000 BTU/Hr T = 40°F (20°C) 1,000 2,000 4,000...
  • Page 31 Applications manual Panel Radiator Design Manual % Radiator Flow 0.50 0.75 Circuit Flow - GPM Fig. 14 | 31 Panel Radiator Design Manual | 12.2009 Technical specifications are subject to change without prior notice...

  • Page 32: Buderus Nb Style Towel Racks

    * Item can be shipped via UPS hardware and a manual air vent is supplied with each towel rack. For piping accessories available through Buderus for a clean, finish installation see Figures 1 and 2. 3 2 | Panel Radiator Design Manual | 12.2009...

  • Page 33: Floor Clearance

    ½" ½" Taping Taping Recommended minimum floor clearance 6" Fig. 15 Buderus NB Style Towel Warmers - Supply and Return tapings are interchangeable. | 33 Panel Radiator Design Manual | 12.2009 Technical specifications are subject to change without prior notice...
  • Page 34 Panel Radiator Design Manual 3 4 | Panel Radiator Design Manual | 12.2009 Technical specifications are subject to change without prior notice...
  • Page 35 Applications manual Panel Radiator Design Manual | 35 Panel Radiator Design Manual | 12.2009 Technical specifications are subject to change without prior notice...
  • Page 36 Bosch Thermotechnology Corporation 50 Wentworth Avenue Londonderry, NH 03053 Tel.: 603-552-1100 Fax: 603-584-1681 www.buderus.net Products manufactured by: Bosch Thermotechnik GmbH Sophienstrasse 30-32 D-35576 Wetzlar www.buderus.de Bosch Thermotechnology Corporation reserves the right to make changes without notice due to continuing engineering...

This manual is also suitable for:

22Towel warmers

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