Burnham MST288 manual Aquastat bulb must be fully inserted into the well, Oil Burner Installation

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7.Screw LWCO to External Wiring Enclosure wiring harness (end with fork and female disconnect terminals) connector into low water cut-off J-box top fitting, and attach wires to the terminals per

LWCO wiring detail shown in Figure 9 "Float-Type LWCO and Gauge Glass Installation".

8.Re-install #67 LWCO J-box cover.

9.Pick-up the LWCO harness Molex end and feed it into the enclosure, thru external electrical enclosure top flange front left 7/8” hole; then, snap-in harness

BX connector into the hole, and, plug-in Molex connector into dedicated LWCO receptacle inside the enclosure (middle left off transformer/relay). See

“ Control Plug-In Diagram” label attached to inside of the enclosure cover for details.

10.Pick-up the pressure limit harness Molex end and feed it into the enclosure, thru External

Electrical Enclosure top flange rear left 7/8” hole; then, snap-in harness BX connector into the hole, and, plug-in Molex connector into dedicated pressure limit receptacle inside the enclosure (upper left off transformer/relay). See “ Control Plug-In Diagram” label attached to inside of the enclosure cover for details.

P.Aquastat Controller Installation (Boilers with Tankless Heater only).

1. On boilers with tankless heater, install the L4006A aquastat controller well (found in Part Carton) into ½” NPT tapping in tankless heater plate.

2. Remove the L4006A aquastat controller with factory attached harness from Control Carton.

3. Slip the bulb of the aquastat controller into the well and secure the controller in place with the set screw.

WARNING

Aquastat bulb must be fully inserted into the well.

4.Feed the L4006A aquastat controller harness end thru external electrical enclosure top flange middle right bushed hole. See “ Control Plug-In Diagram” label attached to inside of the enclosure cover for details.

5.See Figures 18, 19 and 20 (whichever applicable) for tankless heater aquastat connection details.

6.Using needle nose pliers form hook on harness each stripped end and wrap hooks around screws under terminals "R" and "G" of the R8285C Transformer- Relay; then, tighten screws securely.

Q.Safety Valve and Drain Valve Installation.

1.Remove safety valve and related piping (3/4”

NPT x 3” lg. black nipple, 3/4” NPT x 8” lg. black

nipple, ¾” NPT 90° black elbow and ¾” NPT black coupling) from Part Carton.

2.Thread 3/4" NPT x 3” lg. black nipple into rear section safety valve tapping, install ¾” NPT 90° black elbow facing upward, then, thread 3/4" NPT x 8” lg. black nipple into the elbow, and, install ¾” NPT black coupling onto nipple end.

3.Thread safety valve into the ¾” NPT black coupling.

Pipe the safety valve discharge as shown in Figure 11 “ Recommended Boiler Piping For Gravity Return Steam Boiler” shown in Section III of this manual. Installation of the safety valve must be consistent with ANSI/ASME Boiler and Pressure Vessel Code, Section IV.

WARNING

Safety valve discharge piping must be piped near floor to eliminate potential of severe burns. Do not pipe in any area where freezing could occur. Do not install any shut-off valves, plugs or caps.

4.Remove 1-1/2" NPT x 5” lg. black nipple, 1-1/2” x 1-1/2” x ¾” NPT black tee and drain valve from

Part Carton.

NOTICE

Lower rear section Tapping "H" is used for standard condensate return on steam boilers.

5.Thread 1-1/2" NPT x 5” lg. black nipple into lower rear section tapping, then, install 1-1/2” x 1-1/2” x

¾” NPT black tee onto nipple end. Black tee side outlet may be oriented to either left, or, right side.

6.Install the drain valve into black tee ¾” NPT side outlet.

R. Oil Burner Installation.

1.Install oil burner, refer to Figure 10.

a.Open burner carton and remove contents.

b.Check oil nozzle in burner for size, angle and type, inspect electrode settings, check head setting, check air band and air shutter settings, refer to Table 8 at rear of this manual.

c.Place oil burner gasket on burner and align holes.

CAUTION

Do not install burner without gasket.

d.Remove three (3) 5/16-18 x 3/4 lg. cap screw from burner swing door used for mounting burner.

e.Thread (1) 5/16-18 x 3/4 lg. cap screw, approximately three (3) full turns, into tapping located at 12:00 o'clock on burner swing door.

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Contents MegaSteam 100618-01R4-5/08 Price $3.00Important Information Read Carefully Page Table of Contents Page =B=R NET Section I PRE-INSTALLATION Boiler is Suitable for InstallationPage Control Carton Insulation WrapperJacket Carton Instruction/Label BagProcedure To Open, Close and Secure Burner Swing Door Jacket Front Panel InstallationBoiler Removal from Skid Page Page Closing / Securing Burner Swing Door Flueway Baffle InstallationBaffle Usage Jacket Rear Panel Installation Flue Cleanout Covers and Smokebox Collar InstallationUNC Less HeaterSide and Top Jacket Panel Installation External Electrical Enclosure MountingTrim and Controls Installation. Pressure Limit Installation Pressure Gauge and Gauge Glass InstallationFloat-Type Lwco and Pressure Limit Installation Safety Valve and Drain Valve Installation Oil Burner InstallationDo not install burner without gasket Aquastat bulb must be fully inserted into the wellOil Burner Installation Section III Steam Boiler Piping & Trim Evaluate the existing steam systemRecommended Boiler Piping for Gravity Return Steam Boiler Section IV Tankless & Indirect Water Heater Piping Schematic Tankless Water Heater Piping Tankless Heater Data Alliance Water Heater Piping with MegaSteam Boiler Chimney Venting Chimney ConnectorSection V Venting & Air intake piping Recommended Vent Pipe Arrangement and Chimney Requirements Stack Temperature DraftMinimum Clearances Do not exceed maximum allowable air intake lengthSeal all external joints with weatherproof caulk Section VI Electrical GeneralWiring Diagram, Steam, Hydrolevel CG450 Probe Lwco Wiring Diagram, Steam, McDonnell & Miller PS-801 Probe Lwco Wiring Diagram, Steam, McDonnell & Miller #67 Float Lwco Boiler Sequence of Operation with Probe Lwco See Figure Boiler Sequence of Operation with Float Lwco See FigureSingle Pipe Oil Lines Single Pipe Oil LineSingle-Stage Units 3450 RPM Two Pipe Systems Two Pipe Oil LinesTwo-Stage Units 3450 RPM Two Pipe Systems Always Inspect Installation Before Starting Burner Section Viii System START-UPAdjusting Fuel Pump Pressure Adjust OIL Burner While OPERATING. flame presentPage R7184 Terminals, LED and Reset Button Cad Cell Resistance When Sensing FlameCad Cell Location Jumper must be removed after this checkAvoid Breathing Fiber Particulates and Dust Section Ix Maintenance and Service Instructions Steam BoilersPage Gallons / Month MST288 MST396 MST513 MST629 Clean the Combustion Chamber Section X Boiler CleaningClean the Flueways See Figure Page Section XI Trouble Shooting Section XII Repair Parts Bare Boiler Assembly Bare Boiler Assembly Bare Boiler Assembly 1FF Jacket Assembly Jacket Assembly MST288 Thru MST629 Steam Boilers Trim and Controls MST Trim and Controls Beckett AFG Burner Beckett OIL Burner Part NOS. for MegaSteam Series Boilers Beckett AFG Burner specifications OUTService Record Limited Warranty

MST513, MST396, MST629, MST288 specifications

The Burnham MST series, comprising models MST396, MST629, MST513, and MST288, is renowned for its robust design and exceptional performance in the boiler industry. Each model is engineered to provide optimal efficiency and reliability for residential and commercial heating applications.

The Burnham MST396 is distinguished by its high thermal efficiency and advanced combustion technology. This model features a cast iron heat exchanger which ensures superior heat retention and distribution. The MST396 is equipped with a powerful burner that allows for variable firing rates, maximizing efficiency and extending the lifespan of the unit. Additionally, it includes a built-in electronic ignition system that enhances reliability while reducing the need for frequent maintenance.

Moving to the MST629, this model is designed for larger applications needing higher output. It boasts a significant BTU input and utilizes a multi-stage burner system. This ensures optimal combustion and adapts to varying demand, providing consistent heat without wasting energy. The MST629 also incorporates enhanced insulation and an advanced flue gas venting system to improve safety and minimize energy loss.

The MST513 caters to mid-sized applications with its adaptable performance and user-friendly features. This model is notable for its compact design, making it suitable for installations with limited space. It uses a two-stage burner for efficient energy use and offers a smart control system that monitors performance in real-time. This allows users to make informed decisions about their energy consumption and maintenance needs, ultimately leading to cost savings.

Lastly, the MST288 is the smaller model in the series, ideal for homes and small businesses. Despite its size, it does not compromise on efficiency. The MST288 features a straightforward design, ensuring ease of installation and maintenance. It utilizes a single-stage burner that provides consistent heat output, making it a reliable choice for low-demand applications. The unit is also equipped with adjustable settings, allowing users to tailor their heating needs effectively.

In summary, the Burnham MST series demonstrates a remarkable blend of innovation and practicality across its models. With features like advanced burner technology, efficient heat exchangers, and smart controls, the MST396, MST629, MST513, and MST288 cater to a wide range of heating needs while prioritizing energy efficiency and user comfort. These models stand out in the market, continually setting a standard for performance and reliability in heating solutions.
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