Eclipse TFB030 Manual

Also see for TFB030: Installation guide

Contents

Eclipse TFB030 Manual Manual pdf 12 page image

12 Eclipse TFB, V2, Design Guide 310, 11/14/2014It is recommended to check your local standards to verify.Flame SensorFlame sensing is by flame rod (TFB030 & TFB075) or UVscanner (all models).The UV scanner must be compatible to the flamemonitoring control that is used. Refer to the manual ofyour selected control for proper selection of the scanner.■ If combustion air is preheated, the UV scannermust be protected from high temperatures. Installthe UV scanner with a heat block seal and supplycooling air. See Bulletin 834.Flame Monitoring ControlThe flame monitoring control processes the signal fromthe flame sensor and controls the start-up and shut-downsequences.Eclipse recommends the following flame monitoringcontrols:• Trilogy series T600 (Instruction Manual 835)• Veri-Flame series 5600 (Instruction Manual 818)• Bi-Flame series 6500 (Instruction Manual 826)• Multi-Flame series 6000 (Instruction Manual 820)If other controls are considered, contact Eclipse todetermine how burner performance may be affected.Flame monitoring controls that have lower sensitivityflame detecting circuits may limit burner turndown andchange the requirements for ignition.Flame monitoring controls that stop the spark as soon asa signal is detected may prevent establishment of flame,particularly when using UV scanners. The flamemonitoring control must maintain the spark for a fixed timeinterval that is long enough for ignition.Step 5: Combustion Air System: Blower andAir Pressure SwitchThe effects of atmospheric conditionsBlower data is based on the International StandardAtmosphere (ISA) at Mean Sea Level (MSL), whichmeans that it is valid for:• sea level• 29.92" Hg• 70°F.If you are above sea level or in a hot area, the propertiesof the air are different. As the density of the air decreases,the outlet pressure and the flow of the blower decreases.An accurate description of these effects is in the EclipseCombustion Engineering Guide (EFE 825). The Guidecontains tables for the effect of pressure, altitude andtemperature on air.BlowerThe rating of the blower must match the systemrequirements.You can find all the blower data in:• Bulletin / Info Guide 610.Follow these steps:1. Calculate the outlet pressure:When you calculate the outlet pressure of the blower,you must calculate the total of these pressures:- the static air pressure required at the burner- the total pressure drops in the piping- the total of the pressure drops across the valves- the pressure in the radiant or immersion tube(suction or pressurized)- recommend safety margin of 10%2. Calculate the required flow:The blower output is the air flow delivered understandard atmospheric conditions. It must be enoughto feed all the burners in the system at high fire.Combustion air blowers are normally rated in terms ofstandard cubic feet per hour (scfh) of air.An example calculation follows the information tablesbelow:CAUTIONTable 3.4 Required Calculation InformationDescriptionUnit ofMeasureFormulaSymbolTotal system heat input BTU/hr QNumber of burners - -Type of fuel - -Gross heating value of fuel BTU/ft 3 qDesired excess air percentage(Typical excess air percentage @high fire is 15%)percent %Air/Gas ratio(Fuel specific, see table below) -Air flow scfh VairGas flow scfh Vgas