Eclipse RA Series Guía

Eclipse RatioAir

Burners

RA Series

Version 1

Design Guide 115

11/12/2008

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

This publication is protected by federal regulation and shall not

be copied, distributed, transmitted, transcribed or translated

into any human or computer language, in any form or by any

means, to any third parties, without the express written consent

of Eclipse, Inc.

In accordance with the manufacture’s policy of continual product

improvement, the product presented in this brochure is subject

to change without notice or obligation.

The material in this manual is believed adequate for the

intended use of the product. If the product is used for purposes

other than those specied herein, conrmation of validity and

suitability must be obtained. Eclipse warrants that the product

itself does not infringe upon any United States patents. No

further warranty is expressed or implied.

We have made every effort to make this manual as accurate

and complete as possible. Should you nd errors or omissions,

please bring them to our attention so that we may correct them.

In this way we hope to improve our product documentation for

the benet of our customers. Please send your corrections and

comments to our Marketing Communications Manager.

It must be understood that Eclipse’s liability for its product,

whether due to breach of warranty, negligence, strict liability, or

otherwise is limited to the furnishing of replacement parts and

Eclipse will not be liable for any other injury, loss, damage or

expenses, whether direct or consequential, including but not

limited to loss of use, income, or damage to material arising in

connection with the sale, installation, use of, inability to use, or

the repair or replacement of Eclipse’s products.

Any operation expressly prohibited in this Guide, any

adjustment, or assembly procedures not recommended or

authorized in these instructions shall void the warranty.

Co p y r i g h t

Di s C l a i m e r No t i C e

li a b i l i t y a N D

Wa r r a N t y

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

This manual has been written for people who are already familiar

with all aspects of a nozzle-mix burner and its add-on

components, also referred to as “the burner system”.

These aspects are:

Design / Selection•

Use•

Maintenance•

The audience is expected to have previous experience with this

type of equipment.

Design 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•

Price List No. 115

Used to order burners•

Related Documents

EFE 825 (Combustion Engineering Guide)•

Eclipse Bulletins and Info Guides: 710, 732, 742, 760, 818,•

832, 852, 854, 856, 610, 820, 930

Purpose

The purpose of this manual is to ensure that the design of a safe,

effective, and trouble-free combustion system is carried out.

ra t i o ai r Do C u m e N t s

au D i e N C e

About This Manual

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

There are several special symbols in this document. You must

know their meaning and importance.

The explanation of these symbols follows below. Please read it

thoroughly.

Danger:

Indicates hazards or unsafe practices which WILL

result in severe personal injury or even death.

Only qualied and well trained personnel are allowed

to carry out these instructions or procedures.

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.

Caution:

Indicates hazards or unsafe practices which could result

in damage to the machine or minor personal injury, act

carefully.

Note:

Indicates an important part of the text. Read thoroughly.

If you need help, contact your local Eclipse representative.

You can also contact Eclipse at:

1665 Elmwood Rd.

Rockford, Illinois 61103 U.S.A.

Phone: 815-877-3031

Fax: 815-877-3336

http://www.eclipsenet.com

Do C u m e N t

Co N v e N t i o N s

ho W toge t he l p

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

Table of Contents

Introduction.................................................................... 6

Product Description ......................................................... 6

Safety.............................................................................. 7

Introduction...................................................................... 7

Safety .............................................................................. 7

Capabilities...................................................................... 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

Step 5: Flame Monitoring Control System....................... 13

Step 6: Main Gas Shut-Off Valve Train............................ 14

Appendix ........................................................................ 15

Conversion Factors ......................................................... 15

Key to System Schematics.............................................. 16

6Eclipse RatioAir v1 Design Guide No. 115, 11/12/2008

Introduction

pr o D u C t De s C r i p t i o N The RatioAir is a nozzle-mix type burner designed for direct and

indirect air heating of a wide range of applications including:

Industrial Ovens and Furnaces•

Glass Lehrs•

Indirect Fired Air Heaters•

RTO Incinerators•

After Burners•

Galvanizing Kettles•

Waterbath Vaporizers•

The burner package includes a combustion air blower and an air/

gas ratio regulator to re over a wide gas turndown range with

controlled ratio. Available with three different outlet tube

velocity characteristics (standard, medium and high velocity),

RatioAir Burners are capable of outlet speeds of 250 ft/s with the

medium velocity and 500 ft/s with the high velocity.

The burner is designed for:

Efcient Ratio Controlled Combustion•

Reliable Burner Operation•

Simple Burner Adjustment•

Direct Spark Ignition•

Multiple Fuel Capability•

A wide variety of options and congurations are available due to

the modular design of the burner.

The RatioAir Burner

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

Safety

This section is provided as a guide for the safe operation of Ratio-

Air burner system. All involved personnel should read this section

carefully before operating this system.

Danger:

The RatioAir burners, described herein, are designed

to mix fuel with air and burn the resulting mixture. All

fuel burning devices are capable of producing res

and explosions if improperly applied, installed,

adjusted, controlled, or maintained. Do not bypass

any safety feature; re or explosion could result.

Never try to light a burner if it shows signs of damage

or malfunction.

Warning:

The burner might have HOT surfaces. Always wear

protective clothing when approaching the burner.

Note:

This manual provides information in the use of these

burners for their specic design 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 understand any part of the information

contained in this manual, contact Eclipse before

continuing.

Only qualied personnel, with good mechanical aptitude and

experience with combustion equipment, should adjust, maintain, or

troubleshoot any mechanical or electrical part of this system.

The best safety precaution is an alert and trained operator. Train

new operators thoroughly and have them demonstrate an

adequate understanding of the equipment and its operation. A

regular retraining schedule should be administered to ensure

operators maintain a high degree of prociency.

Order replacement parts from Eclipse only. All Eclipse approved,

customer supplied valves or switches should carry UL, FM, CSA,

CGA, and/or CE approval, where applicable.

iN t r o D u C t i o N

sa f e t y

Ca p a b i l i t i e s

op e r a t o r tr a i N i N g

re p l a C e m e N t pa r t s

8Eclipse RatioAir v1 Design Guide No. 115, 11/12/2008

System Design

Design Structure

The design process is divided into the following steps:

Burner Option Selection Including:1.

Burner Model / Size Selection•

Fuel Type•

Air Supply•

Combustor Type•

Combustor Length•

Control Motor•

Burner Conguration•

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 Methodology Including:3.

Burner Control•

Ignition System Including:4.

Ignition Transformer•

Trial for Ignition•

Ignition Gas Piping•

Flame Monitoring Control System Including:5.

Flame Sensor•

Flame Monitoring Control•

Main Gas Shut-Off Valve Train Including:6.

Component Selection•

Valve Train Size•

De s i g N

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% O2) 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 caloric value and density will

affect burner performance.

Fuel Type

Fuel Symbol Gross Heating Value Specic Gravity

Natural Gas CH490%+ 1000 BTU/ft3(40 MJ/m3) 0.60

Propane C3H82570 BTU/ft3(103 MJ/m3) 1.52

Butane C4H10 3250 BTU/ft3(130 MJ/m3) 1.95

BTU/ft3 @ standard conditions (MJ/m3@ 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-ring applications with block and holder,

consult factory.

Step 1: Burner Option

Selection

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

Control Motor

Select a control motor. Standard control motor options include

various models which Eclipse will mount to the burner. RatioAirs

can be ordered with control motor bracket and mounting hardware

only. Customer supplied control motors must conform to the these

specications:

rotation not to exceed 2 rpm•

minimum torque of 25 in-lb (2,8 Nm)•

90° stroke•

continuous modulating or high/low modulating control•

reversible direction of rotation•

certain applications may require control motors with a limit•

switch or switches if:

the burner capacity is to be limited to t an application

- the chamber is to be red with positive or negative

pressure

- the chamber pressure is outside the range -1" w.c.

to +1" w.c. (-2,5 to 2,5 mbar)

- there is a need to indicate a high and/or low re air

buttery valve (BV) position

Burner Conguration

Select conguration.

Gas Pipe Connection

Select the gas pipe connection including the pipe thread type and

the turndown required.

The piping, burner gas inlet, and ratio regulator 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 ame rod or an ultraviolet (UV) scanner will be

required. Flame rods are available on model RA0025, RA0040,

RA0075 and RA0100 burners with alloy or SiC tubes. A amerod

can also be used on RA0200 burners but with upright left hand

piping or inverted right hand piping congurations only. All other

options and models require UV scanners. If a UV scanner is

required, it must be ordered separately.

Warning:

A UV scanner could possibly detect another burner’s

ame if it is in the line of sight, and falsely indicate

ame presence.

Air Flow Switch

The air ow switch provides a signal to the monitoring system

when there is not enough air pressure from the blower. If a switch

is selected, it will be factory mounted.

Warning:

Eclipse supports the NFPA regulation requiring, as

a minimum standard for main gas shut-off systems,

the use of an air pressure switch in conjunction with

other system components.

Conguration Selections:

Step 1: Burner Option

Selection (Continued)

Upright Left Hand Piping

Upright Right Hand Piping

Inverted Left Hand Piping

Inverted Right Hand Piping

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