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Related Manuals for Bryan Boilers Forced Draft Steam Boilers
Summary of Contents for Bryan Boilers Forced Draft Steam Boilers
- Page 1 Installation Operation Service Manual Forced Draft Steam Boilers BRYAN BOILERS 783 N. CHILI AVENUE, PERU, INDIANA 46970 Telephone: 765-473-6651 / Fax: 765-473-3074 E-Mail: bryanboilers@iquest.net / Internet: www.bryanboilers.com...
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Page 2: Boiler Foundation
Remove the bolts attaching the boiler to the crate at the underside of the bottom crating. Lift or slide the boiler off of the bottom crating into position. Be careful not to tip the boiler up on one corner or side, which could cause damage to jacket. IMPORTANT... -
Page 3: Minimum Clearances
NOTE: These boilers are intended to be installed in a room which is large compared to the size of the boiler. They are not intended for alcove installation and are suitable for installation on non- combustible flooring only. D-SERIES DIMENSION... -
Page 4: Boiler Connections
1.4.3 FEEDWATER CONNECTION Install a check valve and a globe valve between the feed pump and the boiler. It is also recommended to install a globe valve between the feed pump and the receiver tank. -
Page 5: Gas Piping Leak Test
See Fig. 1.5A. The gas line must be connected to a supply main at least as large as the gas train connection at the boiler. This connection should be made with a union so that the boiler gas train components and burner may be easily removed, if necessary, for service. -
Page 6: Electrical Connection
Combustion air openings must never be blocked or obstructed in any manner. The boiler room must be at a positive or neutral pressure relative to the outdoors. A negative in the boiler room will result in downdraft problems and incomplete combustion due to lack of air. - Page 7 CAUTION Protection from combustion air contamination: Where corrosive or flammable process fumes are present in the vicinity of the boiler room or the air stream for the combustion air supply, it is essential that suitable means be provided for their safe 1.8 CHIMNEY, FLUE PIPE &...
- Page 8 FIG. 1.8.1: VENT DESIGN INSTRUCTION - TABLE 1.8.1A: ESTIMATING FLUE GAS VOLUMETRIC FLOW RATE Approximate Flue Gas VOLUMETRIC FLOW RATE (Multiply factor listed times boiler input in MBH) BOILER TYPE Water & 15# Steam Gas Fired Oil Fired 150# Steam...
- Page 9 TABLE 1.8.1C: ESTIMATING FLUE GAS EMISSIONS Estimated Emissions (Volumetric Flow Rate Per Million Btu/hr Input) (Multiply PPH listed times boiler input divided by 1,000,000) BOILER PARTICULATES TYPE PPH per MMBH Gas Fired Oil Fired 0.020 1.8.2 CLEARANCES The vent system and draft control devices must be installed so as to achieve the clearances to surfaces outlined in Table 1.2.1, Minimum...
- Page 10 PRESSURIZED VENT SYSTEMS Some Bryan Boilers (unless specifically fitted for the application) are not suitable for operation on a pressurized vent systems. Refer to Section 2 of this manual for the allowable range of vent pressure for each series.
- Page 11 LENGTH OF VENT CONNECTOR The vent connector must be as short as possible and the boiler as close as practical to the chimney or vent. The horizontal run of an uninsulated vent connector to a natural draft chimney or vent...
- Page 12 THE GAS VENT OR CHIMNEY MUST BE SUPPORTED BOILER TOP OR DRAFT DIVERTER. MINIMUM REQUIRED DISTANCE FROM COMBUSTIBLE MATERIAL Listed Vent Single Wall Metal Pipe not permitted...
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Page 13: Marking Of Gas Vents
1.8.7 MARKING OF GAS VENTS In those localities where solid and liquid fuels are used extensively, gas vents must be plainly and permanently identified by a label reading: "This gas vent is for appliances which burn gas only. Do not connect to incinerators or solid or liquid fuel burning appliances."... -
Page 14: Installation
PREVENT THE ENTRANCE OF RAIN OR OTHER PRECIPITATION INTO THE VENT. FAILURE TO PROVIDE SUCH A CAP MAY CAUSE SEVERE BOILER COMBUSTION PROBLEMS, OR BOTH. FIG. 1.8.12B: LOW RESISTANCE VENT CAP 1.8.10 AUTOMATIC VENT DAMPERS ONE APPLIANCE ONLY An automatic vent must be installed such that it serves only one appliance vent - that to which it is properly interlocked. - Page 15 The boilers will also be provided with a label indicating that they have been prepared for high altitude. If a boiler is to be installed at an altitude other than that for which it was factory built, orifices must be replaced to properly adjust FIG.
- Page 16 Determine the boiler (system) Draft Control Factor, F Determine the boiler (or total system) input in MBH. This is done by dividing the boiler (or total system) input in Btu/hr by 1000. Multiply the total input times factor F such...
- Page 17 Determine the NET STACK HEIGHT for the vent. (The net stack height is the vertical distance from the top of the atmospheric boiler draft control to the top of the stack. On forced draft boilers it is the distance from the boiler flue connection to the top of the stack.)
- Page 18 STEP 5: CORRECT EQUIVALENT INPUT FOR SYSTEM K-FACTOR The capacities listed in Table 1.8.15C are based on a system k-factor equal to 7.5. For any other k-factor, the vent capacity must be adjusted. This is accomplished by adjusting the equivalent input for the system using a k-factor correction factor, designated F Refer to Table 1.8.15E for the equivalent input...
- Page 19 NOTE: The above vent input capacities in MBH (thousands of Btu/hr) are sea level ratings for double wall or insulated vents allowing for a system K factor of 7.5. Apply the correction factors for altitude, other k-factors and boiler draft control correction factors.
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Page 20: Special Applications
2. The vent system materials must be considered, regarding resistance from corrosion, which might result from the lower flue gas temperature. 3. In general, it is recommended that the boiler manufacturer be consulted when a flue gas economizer is to be added. -
Page 21: Fuel Connections
National Fuel Gas Code (NFPA54). Oil supply connections must comply with NFPA31. Any additional local or state codes must also be adhered to. 1.10 PROCEDURES TO BE FOLLOWED BEFORE PLACING BOILER IN OPERATION 1.10.1 HYDROSTATIC TEST OF BOILERS AND SYSTEM... - Page 22 Turn OFF the main fuel shutoff valves, including the pilot gas cock if applicable. If the burner is a multiple fuel type, shut OFF all fuel supplies. Turn OFF all electrical disconnects to the burner, boiler and any other equipment or systems electrically interlocked with the burner or boiler.
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Page 23: Checking Burner Input
The maximum input must be properly set as outlined in Lighting Instructions. See the manufacturer's instructions on the VR850 or VR852 included in the Boiler Manual for further information. 2.2 FIRING RATE ADJUSTMENT - GAS METER READINGS 2.2.1 CHECKING BURNER INPUT The burner input rate can be checked by taking readings from the gas meter. - Page 24 This control must be operationally tested. Adjust the pressure setting on the control to a pressure less than the boiler pressure (as shown on the boiler pressure gauge). The control should turn the boiler off.
- Page 25 2.4.6 OTHER CONTROLS Additional controls as required for the particular installation may also be provided. Refer to the literature on these devices included in the Boiler Manual. All such devices must be operationally tested to assure reliable operation of the boiler and system.
- Page 26 +0.25 TO -0.06 NOTE: THE VALUES FOR CO FIRE OR MID RANGE WILL GENERALLY BE LOWER, PARTICULARLY FOR ATMOSPHERIC GAS- FIRED BOILERS. DRAFT SHOULD BE MEASURED APPROXIMATELY 24" FROM TOP OF BOILER, BEFORE ANY DRAFT CONTROL. 2.5.1 DRAFT ADJUSTMENT - ATMOSPHERIC GAS BOILERS Refer to Section 1.8.6 for the adjustment method...
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Page 27: Maintenance Schedule
Section 3 The operating instructions should be kept in the pocket in the boiler for F Series boilers, or adjacent to the boiler for all others. READ THE MANUAL BEFORE ATTEMPTING A START UP. -
Page 28: Required Precautions During Temporary Use
• The boiler area should be kept free of combustible materials, gasoline and other flammable liquids. • The boiler and venting system must be kept free of obstructions of the air louvers and draft hood relief openings. • The following procedures must be conducted as outlined to assure safe operation of the boiler. - Page 29 Continue to apply heat and overflow until the water emitted from the overflow pipe clears. Then shut off burner. 9. Let the boiler cool to 120 F or less. Then drain the boiler. Use caution that the water is discharged with safety.
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Page 30: System Clean Out
3.4 REPLACEMENT BOILER INSTALLATIONS: PROTECTION AGAINST CORROSION & SEDIMENT BOILER MUST CONTROL FEED WATER The water feed to the boiler must be controlled by the boiler-mounted water level control. It is unacceptable to use gravity return or to let the water feed be controlled by a condensate/ receiver/ condensate pump system. -
Page 31: Boiler Water Treatment
WATER SOFTENER It is highly recommended that a zeolite water softener be used for all make-up to the boiler. It is intended that this be used in addition to the chemical treatment of the boiler. Water softening removes calcium and magnesium, the primary causes of hard boiler scale. -
Page 32: Suggested Maintenance Schedule
4. The boiler should be checked at least yearly by the local gas utility company. Particular attention should be paid to the pilot burner safety devices. The pilot burner should be checked to ensure that prompt ignition of all burners occurs as the gas valve opens. -
Page 33: Maintenance
Use new gaskets when replacing glass. The gaskets used should be the same type as those originally supplied with the boiler. Make certain that the gauge glass valves are properly aligned. - Page 35 Dry Lay-up is recommended for longer periods of boiler shut-down or storage. But it is practical only if boiler can be drained hot (120 F to 170 F) or if external drying can be provided. WET LAY-UP OF STEAM BOILERS - SHORT...
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Page 36: Alternate Method
3.11A. Then lower the boiler water level to introduced it into the boiler. Then operate the boiler at low fire to circulate the water and mix the chemical. Then repeat Step. 2. Pay attention to the maintenance of the valves being used to isolate the boiler to prevent leakage and resultant dilution of the lay-up solution. - Page 37 2. If a boiler has been down for repairs and is to be laid up, it should be operated to pressurize with steam and then drained and pressurized with nitrogen as in step 1.
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