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Burnham 8HE Series Application Instructions

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Multiple Boiler Application Instructions for
Series 8HE
This manual must only be used by a qualified heating installer/service technician. BEFORE installing, read all
instructions in this manual and all other information shipped with the boiler. Post all instructions and manuals
near the boiler for reference by service personnel. Perform steps in the order given. Failure to comply could
result in severe personal injury, death or substantial property damage.
111924-01 - 2/23
8HE
!
WARNING
Multiple Boiler Application Instructions
Commercial Boilers
www.burnhamcommercial.com
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Summary of Contents for Burnham 8HE Series

  • Page 1 Multiple Boiler Application Instructions Multiple Boiler Application Instructions for Series 8HE WARNING This manual must only be used by a qualified heating installer/service technician. BEFORE installing, read all instructions in this manual and all other information shipped with the boiler. Post all instructions and manuals near the boiler for reference by service personnel.

  • Page 2: Hazard Definitions

    Multiple Boiler Application Instructions IMPORTANT INFORMATION - READ and save these instructions for reference. HAZARD DEFINITIONS The following defined terms are used throughout this manual to bring attention to the presence of hazards of various risk levels or to important information concerning the life of the product. DANGER CAUTION Indicates a hazardous situation that, if not...
  • Page 3 Multiple Boiler Application Instructions WARNING • Improper installation, adjustment, alteration, service or maintenance can cause property damage, personal injury or loss of life. Failure to follow all instructions in the proper order can cause personal injury or death. Read and understand all instructions, including all those contained in component manufacturers manuals which are provided with the appliance before installing, starting-up, operating, maintaining or servicing this appliance.
  • Page 4 It is common and acceptable practice to install these boilers in lower pressure systems, below the boiler MAWP. Therefore, in addition to Safety Relief Valves set for 50 psi, Burnham also offers Safety Relief Valves set for 30 psi (By Special Order Only).
  • Page 5 Multiple Boiler Application Instructions Important Product Safety Information: Refractory Ceramic Fiber Product WARNING Some boiler components use materials that contain refractory ceramic fibers (RCF). RCF has been classified as a possible human carcinogen. When exposed to elevated temperatures, RCF may change into crystalline silica, a known carcinogen. When disturbed as a result of servicing or repair, these substances become airborne and, if inhaled, may be hazardous to your health.

  • Page 6: Air For Ventilation And Combustion

    Multiple Boiler Application Instructions Air for Ventilation and Combustion If it is known or suspected that the air infiltration WARNING rate is less than 0.4 ACH (air changes per hour), Provide combustion and ventilation air in the minimum required room volume is calculated accordance with section "Air for Combustion using the formula: and Ventilation", of National Fuel Gas...
  • Page 7 Multiple Boiler Application Instructions Air for Ventilation and Combustion (continued) c. Outdoor opening(s) size. The outdoor Motorized louvers shall be interlocked with each opening(s) size shall be calculated in appliance so they are proven in the full open accordance with the following: position prior to main burner ignition and during main burner operation.
  • Page 8 Multiple Boiler Application Instructions Air for Ventilation and Combustion (continued) 1.10 Example: A 3 story apartment house needs a Room Volume = 20 ft x 10 ft x 12 ft = 1.4 ft /MBH total boiler capacity including domestic water MBH Input 1734 MBH heating, of 1,250,000 Btu/Hr net rating.
  • Page 9 Multiple Boiler Application Instructions Air for Ventilation and Combustion (continued) Figure 1-3: Ventilation Air Provided from Inside Building Figure 1-4: Ventilation Air Provided from Outdoors 111924-01 - 2/23...
  • Page 10 Multiple Boiler Application Instructions Venting 2.2 General WARNING Vent systems are generally less flexible in design Asphyxiation Hazard. location than are water pipes, gas pipes or electrical • Failure to vent this boiler in accordance with these lines. To avoid conflicts for a given location, design instructions could cause products of combustion and layout the vents in this section before proceeding and/or carbon monoxide to enter living space,...
  • Page 11 Multiple Boiler Application Instructions Venting (continued) 2.4 Determine the input required to the system. See If a masonry chimney is desired, the minimum Section 1.3 and Table 1-2. cross sectional area of the chimney is found in Table 2-11 as a function of the vent diameter. 2.5 Individual Vents Confirm adequate ceiling height.
  • Page 12 Multiple Boiler Application Instructions Venting (continued) 2.6.3 The above procedure is based on data found If a tapered or graduated manifold vent is desired, such as in Figure 2-4, the horizontal and in the ASHRAE Handbook, Equipment Volume, Chapter 35. The basic chimney equation is vertical portion of the vent serving all six boilers expressed as follows: is also complete with the above.
  • Page 13 Multiple Boiler Application Instructions Venting (continued) Figure 2-1: Boiler Dimensions Table 2-2: Minimum Installation Clearances Around Boilers Rear, Sides, Drafthood Top of Side-by- Back- Back-to- Front-to- Front & Vent Connector Jacket Side to-Side Back Front To Combustible 6 in. 36 in. 18 in.
  • Page 14 Multiple Boiler Application Instructions Venting (continued) 111924-01 - 2/23...
  • Page 15 Multiple Boiler Application Instructions Venting (continued) 111924-01 - 2/23...
  • Page 16 Multiple Boiler Application Instructions Venting (continued) Figure 2-5: Dual Constant Diameter Manifold Vent 111924-01 - 2/23...
  • Page 17 Multiple Boiler Application Instructions Venting (continued) Figure 2-6: Constant Diameter Manifold with Laterals in Vent Connectors 111924-01 - 2/23...
  • Page 18 Multiple Boiler Application Instructions Venting (continued) Figure 2-7: Graduated Manifold Figure 2-8: Constant Diameter Manifold 111924-01 - 2/23...
  • Page 19 Multiple Boiler Application Instructions Venting (continued) Table 2-9: Vent Diameter for Common Venting Diameter of Common Vent & Manifolds (CV), inches Boiler Qty H - Total Vent Height (ft.) Total Input 805HE 806HE 1016 1076 1136 1196 1255 1315 1375 1435 1495 1554...
  • Page 20 Multiple Boiler Application Instructions Venting (continued) Table 2-10: Vent Connector Diameters for Common Venting, inches Vent Connector Diameters for Common Venting, (CN), inches 805HE 806HE Total Vent Connector Rise Height (ft.) (ft.) Double Wall Single Wall Double Wall Single Wall Table Notes: •...
  • Page 21 Multiple Boiler Application Instructions Venting (continued) Table 2-11: Masonry Chimney Liner Dimensions with Circular Equivalents Inside Equivalent Equivalent Area Nominal Liner Inside Dimensions Diameter (in.) (in.) Size (in.) of Liner (in.) 28.3 38.3 42.7 8 x 8 6.75 x 6.75 50.3 63.6 8 x 12...

  • Page 22: Water Piping

    Multiple Boiler Application Instructions Water Piping WARNING • Pressure relief valve discharge piping must be piped such that the potential of severe burns is eliminated. DO NOT pipe in any area where freezing could occur. DO NOT install any shut off valves, plugs or caps. See boiler manual for further information.
  • Page 23 Multiple Boiler Application Instructions Water Piping (continued) 3.4 Water Quality Requirements: * Reverse-Return, as shown in Figure 3-3. Direct Return is inherently unbalanced and may pH: 6.0 – 9.5 prevent some boilers from delivering their rated Total hardness grains / gal: <7 capacities.
  • Page 24 Multiple Boiler Application Instructions Water Piping (continued) as shown in Figure 3-13. Pressure relief valve On the slanted lines read the corresponding discharge piping must be piped such that the pipe sizes (use the larger if between two pipe potential of severe burns is eliminated. DO NOT sizes) pipe in any area where freezing could occur.
  • Page 25 Multiple Boiler Application Instructions Water Piping (continued) 4. From the point in 2) above move down vertically Example: Find the water volume in 528 ft. of 1. in to the 2. pipe line and horizontally to the left copper dual tiered commercial finned tube. hand scale.
  • Page 26 Multiple Boiler Application Instructions Water Piping (continued) 3.18.8 If the optional flex couplings are to be used, 3.17.3 Diaphragm type expansion tanks – size per tank manufacturer’s instructions. they should be installed according to the instructions in section 3.19. 3.18 Water Manifolds 3.18.9 If groove style couplings are to be used, they 3.18.1 Optional fabricated manifolds are available should be installed according to the instructions...
  • Page 27 Multiple Boiler Application Instructions Water Piping (continued) 3.19.4 Special Notes a. Assembly of gaskets can be made easier by b. Install remaining retainer (4) and gasket (5) on dipping gaskets in water or wiping them with a other pipe end or manifold. small amount of liquid hand soap.
  • Page 28 Problems caused by oxygen multiplying factor from 3) by water heating load. contamination of boiler water are not covered by Burnham's standard warranty. 5. Total the space heating load and the “boiler added capacity”. There are many possible causes of oxygen contamination such as: 6.
  • Page 29 Multiple Boiler Application Instructions Water Piping (continued) Figure 3-1: Piping Diagram (2 Boilers), Primary/Secondary with Mixing Valves Figure 3-2: Piping Diagram (2 Boilers), Primary/Secondary with By-Pass 111924-01 - 2/23...
  • Page 30 Multiple Boiler Application Instructions Water Piping (continued) Figure 3-3: Piping Diagram (2 Boilers), Parallel Piping with Recirculation Loop 111924-01 - 2/23...
  • Page 31 Multiple Boiler Application Instructions Water Piping (continued) Figure 3-4: Expansion and Air Elimination Details 111924-01 - 2/23...
  • Page 32 Multiple Boiler Application Instructions Water Piping (continued) 111924-01 - 2/23...
  • Page 33 Multiple Boiler Application Instructions Water Piping (continued) Table 3-6: Boiler Water Data Temp. Rise Boiler Water Heating Flow Rate Min. Boiler Boiler Size thru Boiler Pressure Volume (Gal) Surface (Ft (GPM) Piping (NPT) (°F) Drop (ft.) 20°F 1-1/2 in. 3 ft. 805HE 11.9 34.4...
  • Page 34 Multiple Boiler Application Instructions Water Piping (continued) HEAT CONVEYED PER HOUR, MBH (20°F TEMPERATURE DROP) To use this Figure: 1. Enter horizontal scale at desired flow, 2. Move down vertically to upper limit of unshaded area, 3. Pick off minimum pipe size on diagonal lines sloping upward to the right. 4.
  • Page 35 Multiple Boiler Application Instructions Water Piping (continued) HEAT CONVEYED PER HOUR, MBH, (20°F TEMPERATURE DROP) To use this Figure: 1. Enter horizontal scale at desired flow, 2. Move down vertically to upper limit of unshaded area, 3. Pick off minimum pipe size on diagonal lines sloping upward to the right. 4.
  • Page 36 Multiple Boiler Application Instructions Water Piping (continued) Table 3-10: Volume of Water in Steel Pipe and Copper Tube - Gal/ft. Size Copper .012 .025 .043 .065 .092 .161 .250 .357 .625 1.00 1.40 2.43 3.78 5.40 Tube Steel Pipe .016 .028 .045 .078...
  • Page 37 Multiple Boiler Application Instructions Water Piping (continued) Table 3-12: Expansion Tank Correction Factor Initial Allowable System Pressure Increase* Pressure on Compression 6 psi 8 psi 10 psi 12 psi 14 psi 16 psi 20 psi 25 psi 30 psi 40 psi 50 psi 75 psi Tank 4 psi 8 psi...
  • Page 38 Multiple Boiler Application Instructions Water Piping (continued) Figure 3-13: Piping Diagram, Domestic Water Heating 111924-01 - 2/23...
  • Page 39 Multiple Boiler Application Instructions Water Piping (continued) Table 3-14: Service Hot Water Demand Apartment Hotels and Industrial Office Club Gymnasium Hospital School YMCA House Dormitories Plant Bldg. Basins, Private Lavatory Basins, Public Lavatory Bathtubs 1 1/2 1 1/2 1 1/2 1 1/2 Dishwashers 1 1/2...
  • Page 40 Multiple Boiler Application Instructions Water Piping (continued) CURVE A - RESTAURANTS CURVE B - HOSPITALS, NURSING HOMES, NURSES RESIDENCES, DORMITORIES, APT. HOUSES, HOTELS, AND MOTELS CURVE C - OFFICE BLDGS, ELEMENTARY AND HIGH SCHOOLS FIXTURE UNITS SERVICE HOT WATER FLOW RATE To use this Figure: 1.
  • Page 41 Multiple Boiler Application Instructions Water Piping (continued) FACTOR x WATER-HEATING LOAD = ADDITIONAL BOILER CAPACITY RATIO = HOT WATER HEATING LOAD (BTUH) / HEATING LOAD (BTUH) SIZING FACTORS FOR COMBINATION HEATING / SERVICE WATER BOILERS To use this Figure: 1. Calculate ratio of hot water heating load to heating load. 2.

  • Page 42: Gas Piping

    Multiple Boiler Application Instructions Gas Piping a. type of gas (natural or propane) b. specific gravity WARNING c. heating value • Failure to properly pipe gas supply to boiler may 4.3 Gas Pipe Sizing – Series Connections result in improper operation and damage to the 4.3.1 Table 4-3 may be used for sizing pipes and boiler or structure.
  • Page 43 Multiple Boiler Application Instructions Gas Piping (continued) from the gas meter to farthest boiler. Size the from the gas meter to farthest boiler. Size the 8. Since all boilers require the same input MBH, piping: piping: – 1 in. applies to the vertical drops to a.
  • Page 44 Multiple Boiler Application Instructions Gas Piping (continued) should be sealed with an approved compound DANGER to prevent leaks. Explosion Hazard. 4.5.3 Traps – Install a trap similar to that shown in Do not use matches, candles, open flames Figure 4-7 at the low end of the vertical run to or other ignition sources to check for leaks.
  • Page 45 Multiple Boiler Application Instructions Gas Piping (continued) 111924-01 - 2/23...
  • Page 46 Multiple Boiler Application Instructions Gas Piping (continued) 111924-01 - 2/23...
  • Page 47 Multiple Boiler Application Instructions Gas Piping (continued) NOTICE: Table 4-3: Use this table only if all of the following Total Input MBH of Pipe/Fitting Size (NPT) conditions are met: Boiler(s) Served by Natural Gas Pipe/Fitting 1. 50 ft. maximum plus 3 ells from Meter to furthest Boiler Gas Connection 264.
  • Page 48 Multiple Boiler Application Instructions Gas Piping (continued) Table 4-5: Maximum Capacity of Pipe (ft /HR) Nominal Length of Pipe, Feet Internal Iron Pipe Dia., In. Size, In. .364 .493 .622 .824 1.049 1-1/4 1.380 1,050 1-1/2 1.610 1,600 1,100 2.067 3,050 2,100 1,650...
  • Page 49 Multiple Boiler Application Instructions Gas Piping (continued) Table 4-6: Support of Piping Size of Pipe (Inches) Spacing of Supports (Feet) ½ ¾ or 1 1¼ or larger (horizontal) 1¼ or larger (vertical) Every floor level Figure 4-7: Moisture and Dirt Trap for Gas Supply to Each Boiler 111924-01 - 2/23...
  • Page 50 Multiple Boiler Application Instructions Controls WARNING Do not bypass any boiler safety or operating controls. See boiler IO&S Instructions for boiler controls and wiring information. 5.1.1 Install multi-stage boiler control(s). Follow If multi-stage control does not provide option all control manufacturers’ instructions. to fire minimum of 2 boilers simultaneously, Manufacturers of multi-stage boiler controls use relays to group boilers in pairs or groups...

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