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Buderus 21 User Manual

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

Other manuals for Buderus 21

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Buderus 21 Specifications

General IconGeneral
BrandBuderus
Model21
CategoryHeater
LanguageEnglish

Summary

1. General Information

1.1. This Manual

Describes the basic operation of Buderus panel radiators, controls, and piping accessories. Includes dimensions and installation procedures.

1.2. Standards, Regulations and Directives

Installer's responsibility to ensure system compliance with current regulations and rules for safe operation.

2. Safety

2.1. Layout of the Instructions

Explains danger levels (Fatal Injury, Injury/System Damage) and additional symbols for user instructions.

2.2. Please Follow These Instructions

Emphasizes using only original Buderus spare parts to maintain warranty and avoid damage.

2.3. Tools, Materials and Accessories

Lists standard tools required for installing panel radiators and towel racks for central heating systems.

2.4. Disposal

Guidelines for environmentally responsible disposal of packaging and defunct components.

3. Product Description

Radiant Heat vs. Convection Heat

Compares radiant heat (objects) with convection heat (air), highlighting panel radiators' efficiency and comfort.

Buderus Panel Radiators

Details Buderus 'solidoflux N' panel radiators, construction, models (#21, #22), and standard equipment.

Available Models

Presents a table of Model 21 radiators with dimensions, dry weight, and water volume.

Model 22

Buderus Towel Warmers

Describes Buderus NB style towel warmers, their design, application in bathrooms, and performance.

Radiator Accessories

Mounting Brackets

Details that wall mounting brackets are included, and floor mounting brackets are available as accessories.

Piping Connections

Explains radiator tapings and Buderus compression fittings for most applications, with a table of part numbers.

Floor Brackets for Panel Radiators

Floor Brackets

Lists part numbers for floor brackets for Model 22 and Model 21 radiators.

Flow Setter Valve

Describes the flow setter valve, its components for temperature control and flow balancing.

Flow Balancing

Explains how to adjust the flow setter valve ring (1-7, N) to balance water flow and achieve desired settings.

Air Vent and Drain Plug

Details the manual air vent and removable drain plug on each radiator for draining and venting.

Diverter Valves

Installation Considerations

Details mounting the valve to the radiator and required floor clearance for straight and angled diverter valves.

Thermostatic Sensor Head

Temperature Control

Explains how the thermostatic head controls flow rate via the flow setter valve for individual room temperature control.

4. Mounting Guidelines

Panel Radiator Installation

Covers wall or floor mounting for Model 21 & 22 radiators, bracket requirements, and stud mounting.

Radiator Clearance Requirements

Provides a table of minimum clearance dimensions required around radiators for different valve types and access.

Model 21 and 22: Wall Mounting

Details bracket positioning, radiator wall clearance, piping connections, and wall offset dimensions.

Model 21 and 22: Floor Mounting

Explains floor bracket use for alternative mounting, including components and height adjustability.

5. Radiator Output Ratings

Radiator Outputs in BTU/Hr

Presents BTU/hr output for Model 21 radiators based on size, supply temperature, and temperature drop.

Model 22: 4" (100mm) Deep

Output BTU/hr

Provides BTU/hr output for Model 22 radiators based on size, supply temperature, and temperature drop.

Performance Curves Model 22 Radiators

Ambient Room Temperature Effect

Explains how to compute adjusted radiator output based on ambient room temperature and a correction factor.

Supply Water Temperature Effect

Describes using conversion factors (Table 9) or curves (Fig. 10) to adjust output based on supply water temperature.

6. Radiator Selection Procedure

1. The Panel Radiator(s) Must Have at Least the Required Capacity

States that radiators must match heat loss; oversizing is acceptable with thermostatic controls.

2. Radiators Are Frequently Selected Based on the Intended Location

Discusses selecting radiators based on location, window size, and room size, advising on multiple radiators for larger rooms.

3. The Selected Piping Arrangement Affects the Radiator Sizing

Explains how piping arrangement (one-pipe systems) impacts radiator sizing due to decreasing supply temperature.

4. For Rooms That Are Used Occasionally Where a Rapid Heat-Up Is Required

Recommends extra radiation for rooms needing rapid heat-up, especially with outdoor reset control systems.

5. Radiators Equipped with Thermostatic Sensor Heads

Compares thermostatic heads on radiators to central thermostats for room temperature uniformity and responsiveness.

7. Piping Arrangements

One-Pipe System Options

Introduces three one-pipe system arrangements and general sizing guidelines for radiators and piping.

Series Loop System

Describes series loop systems where water flows through all radiators, requiring careful sizing.

Option 1: One-Pipe System with Monoflow Tees

Details monoflow tee systems, thermostat requirements, sizing, and operation for individual temperature control.

Option 2: One-Pipe System with Diverter Valves

Explains one-pipe systems using diverter valves, flow throttling, and individual temperature control methods.

Option 3: Multiple One-Pipe Systems

Design Procedure for One-Pipe System with Monoflow Tees or Diverter Valves

Example: One-Pipe System Layout

Results: Output/ft Radiator Models

Summarizes radiator models and their output per foot for different supply temperatures in a one-pipe system.

Solution: Step 1. Complete the Radiator Sizing Sheet

Guides through completing sizing, selecting controls, piping, pump, and determining radiator models based on calculations.

Two-Pipe System Options

Benefits of Two-Pipe Systems

Highlights advantages of two-pipe systems: uniform supply temperature, no limit on radiators, and individual control.

Requirements for Two-Pipe System

Outlines two main pipes, pressure actuated bypass valve necessity for constant circulation with thermostatic heads.

Design Procedure for Two-Pipe System

Example 2: Two-Pipe System Lay-out

Solution: Two-Pipe System Lay-out

Guides selecting radiators based on heat output/space, temperature drop, flow rate, and combining info in tables.

Balancing the System

Procedure for Setting the Flow-Setter Valves

Step-by-step guide to setting flow-setter valves by identifying largest radiator, using pressure drop charts, and adjusting settings.

Piping Lay-out Suggestions

Offers suggestions for piping layouts (one-pipe, two-pipe) and pump selection based on system size and loop count.

Radiator Selection & System Start-up Suggestions

Provides tips on radiator sizing, using thermostatic heads for comfort, system balancing, and retightening fittings.

Pressure Drop Curves

8. Buderus NB Style Towel Racks

NB Style Towel Rack Stock Sizes

Lists available Buderus NB Style towel rack models with dimensions, BTU output, weight, and part numbers.

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