Burnham MST629, MST288, MST396, MST513 Trim and Controls Installation. Pressure Limit Installation

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L.Trim and Controls Installation. Pressure Limit Installation.

1.Locate and remove L404F Pressure Limit with factory attached harness from Control Carton.

2.Locate and remove 1/4" NPT x 1-7/8" x 4 x 90° syphon enclosed in Part Carton.

3.Review and locate pressure limit tapping on front section. See Table 3 “ Purpose of Tappings &

Bosses” and Figure 7.

4.Thread 1-7/8" lg. syphon-threaded short end into the bottom of Pressure Limit with factory attached harness. Do not tighten the syphon by holding the limit case; apply a wrench to the brass hex below the case.

5.Thread ¼" NPT x 4" lg. syphon-threaded long end into pressure limit tapping on front section. See Figure 8 "Pressure Limit Installation.

6.L404F pressure limit does not require leveling. The pressure limit final orientation must be parallel to boiler front, having the harness on the right side.

7.Pick-up the pressure limit harness Molex end and feed it into the enclosure, thru top flange rear left

7/8” hole; then, snap-in harness BX connector into the hole, and, plug 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.

Figure 8: Pressure Limit Installation

M.Probe LWCO (Hydrolevel CG450, or, McDonnell-Miller PS801-120) Installation.

1.Remove either Hydrolevel CG450 LWCO with factory attached harness and Hydrolevel probe

#EL1214, or, McDonnell-Miller PS801-120 with factory attached harness and #153875 probe from

Control Carton.

2.Install the probe into the appropriate front section tapping. See Figure 7 “Purpose of Tappings &

Bosses”.

3.Slip LWCO with factory attached harness over the probe and clamp in place. Note that CG450 LWCO will be positioned right side up, with diagnostic LED(s) on the top flange, while PS801 LWCO will be positioned upside down, with diagnostic LED(s) on the bottom flange. Connect the wire(s) between the probe and control per manufacturer’s instructions.

4.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.

N.Pressure Gauge and Gauge Glass Installation.

1.Remove the 6” water gauge glass set from Part Carton.

2.Install the gauge glass using the two ½” NPT tappings to the right of the probe LWCO. See Figure 7 “Purpose of Tappings & Bosses”.

3.Thread the pressure gauge into 1/4” NPT tapping of the front section. See Figure 7 “Purpose of Tappings

& Bosses”. Tighten with wrench applied to the square shank of the gauge.

CAUTION

Do not apply pressure to gauge case, as this may result in inaccurate readings.

O.Float LWCO (McDonnell-Miller #67), AND Gauge Glass Installation.

1.Pre-assemble float-type LWCO per Figure 9 "Float-

Type LWCO and Gauge Glass Installation".

2.Install two ½” NPT x 2½" long Sch 40 brass nipples, supplied loose inside Control Carton (disregard two

½" NPT x 1½" long brass nipples provided with #67 LWCO package) and ½" NPT brass unions into upper and lower front section tappings. See Table 3 "Purpose of Tappings & Bosses" and Figure 7.

3.Install water gauge glass on low water cut-off assembly tee fittings.

4.Do not remove ¼” NPT plug factory installed on top of #67 LWCO.

5.Insure that 3/8" NPT plug (provided within #67

LWCO package) is installed at bottom of #67

LWCO.

6.Remove #67 LWCO J-box cover.

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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 Jacket Carton Control CartonInsulation Wrapper Instruction/Label BagProcedure To Open, Close and Secure Burner Swing Door Jacket Front Panel InstallationBoiler Removal from Skid Page Page Flueway Baffle Installation Baffle UsageClosing / Securing Burner Swing Door 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 Do not install burner without gasket Safety Valve and Drain Valve InstallationOil Burner Installation 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 Connector Section V Venting & Air intake pipingChimney Venting 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 LineTwo Pipe Oil Lines Two-Stage Units 3450 RPM Two Pipe SystemsSingle-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 Section X Boiler Cleaning Clean the Flueways See FigureClean the Combustion Chamber 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.