background image

9

Eclipse RatioAir v1 Design Guide No. 115, 11/12/2008

Step 1 describes how to select burner options to suit an 

application. Use the RatioAir Price List 115 and Datasheets, 

Series 115 when following this selection process.

Caution:

Consult EFE-825 Eclipse Engineering Guide, or contact 

Eclipse if you have special conditions or questions.

Burner Model / Size Selection

Consider the following when selecting the burner size:

Heat Input: 

• 

Calculate the required heat input to achieve 

the required heat balance.

Power Supply Frequency: 

• 

Burner capacity will vary with 

power supply frequency (60Hz power).

Combustion Chamber Pressure: 

• 

Consider the effects 

that large or varying chamber pressures have on burner 

performance.

Altitude:

• 

 The maximum burner capacity is reduced by 

approximately 3% each 1000 feet (300 meters) above sea 

level.

Combustion Air Supply:

• 

 Combustion air should be fresh 

(20.9% O

2

) and clean (without corrosives).

Combustion Air Temperature: 

• 

Changes in air supply 

temperature can affect the burner capacity. The 

combustion air supply temperature should not exceed 

250°F.

Fuel Type: 

• 

Variation in calorific value and density will 

affect burner performance.

Fuel Type

Fuel

Symbol

Gross Heating Value

Specific Gravity

Natural Gas CH

4

90%+ 1000 BTU/ft

3

 (40 MJ/m

3

)

0.60

Propane

C

3

H

8

2570 BTU/ft

3

 (103 MJ/m

3

)

1.52

Butane

C

4

H

10

3250 BTU/ft

3

 (130 MJ/m

3

)

1.95

BTU/ft

@ standard conditions (MJ/m

3

 @ normal conditions)

If using and alternative fuel supply, contact Eclipse with an accurate 

breakdown of the fuel components.

Air Supply

When a standard RatioAir Version 1.0 burner is ordered, a 

combustion air blower is supplied and mounted directly to the burner 

body.

Combustor Type

Select a combustor type based on the application. Low temperature 

applications use an alloy combustion tube. High temperature 

applications use a silicon carbide (SiC) tube or a refractory block & 

holder. For vertical down-firing applications with block and holder, 

consult factory.

Step 1:

 

Burner Option 

Selection

Summary of Contents for RA Series

Page 1: ...Eclipse RatioAir Burners RA Series Version 1 Design Guide 115 11 12 2008...

Page 2: ...sed or implied We have made every effort to make this manual as accurate and complete as possible Should you find errors or omissions please bring them to our attention so that we may correct them In...

Page 3: ...ign Guide No 115 This document Datasheet Series 115 Available for individual RA models Required to complete design and selection Installation Guide No 115 Used with Datasheet to complete installation...

Page 4: ...Act with great care and follow the instructions Warning Indicates hazards or unsafe practices which could result in severe personal injury or damage Act with great care and follow the instructions Ca...

Page 5: ...lities 7 Operator Training 7 Replacement Parts 7 System Design 8 Design 8 Step 1 Burner Option Selection 9 Step 2 Blower Option Selection 11 Step 3 Control Methodology 11 Step 4 Ignition System 12 Ste...

Page 6: ...ower and an air gas ratio regulator to fire over a wide gas turndown range with controlled ratio Available with three different outlet tube velocity characteristics standard medium and high velocity R...

Page 7: ...sign purpose Do not deviate from any instructions or application limits described herein without written advice from Eclipse Read the entire manual before attempting to start this system If you do not...

Page 8: ...on Gas Pipe Connection Flame Supervision Air Flow Switch Blower Option Selection Including 2 Power Supply Frequency Pressure and Flow Blower Motor Type Blower Inlet Motor Orientation Control Methodolo...

Page 9: ...and clean without corrosives Combustion Air Temperature Changes in air supply temperature can affect the burner capacity The combustion air supply temperature should not exceed 250 F Fuel Type Variati...

Page 10: ...lator are threaded using the customer selected pipe thread option The high turndown option includes a ratio regulator with an adjustment for lower inputs Flame Supervision Determine if a flame rod or...

Page 11: ...e limitations cleanliness requirements of the process Motor Orientation All RatioAirs are assembled with a right hand blower motor orientation All standard RatioAirs are designed for air gas ratio con...

Page 12: ...under certain circumstances RatioAirs are capable of direct spark ignition at higher gas inputs Most local safety codes and insurance requirements limit the maximum trial for ignition time the time i...

Page 13: ...itoring Control Flame Sensor Two types can be used on a RatioAir Burner Flame Rod UV scanner Flame rods are available on model RA0025 RA0040 RA0075 and RA0100 burners with alloy or SiC tubes A flame r...

Page 14: ...cted during trial for ignition Component Selection Eclipse can help in the design of a main gas shut off valve train that satisfies the customer and complies with all local safety standards and codes...

Page 15: ...ter mm inch in 3 94 x 10 2 MJ m normal BTU ft standard 2 491 x 10 2 Metric to English From To Multiply By kiloPascals kPa millibar mbar 10 meter m millimeter mm 1000 millibar mbar kiloPascals kPa 0 1...

Page 16: ...y burners 760 Fuel Orifice Meter Fuel orifice meters are used to measure gas flow 910 Adjustable Limiting Orifice Adjustable limiting orifices are used for fine adjustment of gas flow Pressure Regulat...

Page 17: ...Offered By Burnerparts com 2011 Williamsburg Road Richmond Virginia 23231 Phone 804 236 3881 Fax 804 236 3882 www burnerparts com...

Reviews: