Burnham MST396, MST288, MST629, MST513 manual J. Side and Top Jacket Panel Installation

6.Repeat above steps with right Cleanout Cover.

7.Apply the adhesive sealant to the underside of the collar, all around, at the inside corner of the collar outer ring. Insure adhesive bead is complete all around and without gaps.

8.Place the collar over smokebox tongue and align collar integral mounting ear slots with smokebox bosses.

9.Thread-in both 5/16”-18 – 7/8” hex head cap screws hand tight, then, alternately tighten them with open end or socket wrench.

I.Insulation Wrapper and Burner Power Outlet Receptacle with Harness Installation.

1.Insulation Wrapper is vacuum packed/sealed in plastic bag at the factory.

2.Carefully cut the plastic bag and remove Insulation

Wrapper. The wrapper will expand upon removal.

3.Unfold Insulation Wrapper, position it over section assembly centered left to right and align two wrapper upper holes with 2" NPT pipe tappings in front and rear section top.

4.Insure wrapper fits snugly around rear section tankless heater collar/ mounting flange (if boiler is equipped with tankless heater) and trim the insulation at tankless heater cutout. Do not trim off insulation on boilers having non-heater rear section.

5.Tack Insulation Wrapper bottom ends under section assembly, between front and rear section legs.

6.Locate and remove Burner Power Outlet Receptacle with factory attached Burner Harness from Control Carton.

7.Feed Molex end of Burner Harness thru front jacket panel right side outlet receptacle cutout. Insure that the receptacle middle prong opening is facing down. Snap the receptacle into front jacket panel. Temporarily, stuff Molex end of Burner Harness between front panel insulation and insulation wrapper near boiler top.

J.Side and Top Jacket Panel Installation.

1.Pick up Left Side Jacket Panel from Jacket Carton.

See also “Repair Parts” Section, “Jacket Assembly” illustration for part identification.

2.Place Left Side Jacket Panel over four #8 x ½” shoulder sheet metal screws, earlier installed at

Front and Rear Jacket Panel side flanges, so teardrop cutouts in the side panel inside flanges engage all four screws simultaneously.

3.Slide the panel downwards to lock all screws securely.

4.Pick up Right Side Jacket Panel from Jacket Carton.

See also “Repair Parts” Section, “Jacket Assembly” illustration for part identification.

5.Pick up Molex end of Burner Harness stuffed between front panel insulation and insulation wrapper and feed it thru Right Side Jacket Panel front cutout, letting the harness connector to hang over the cutout edge temporarily.

6.Place Right Side Jacket Panel, clearing rear section tankless heater collar/ mounting flange, over four

#8 x ½” shoulder sheet metal screws, previously installed at Front and Rear Jacket Panel side flanges, so teardrop cutouts in the side panel inside flanges engage all four screws simultaneously.

7.Slide the panel downwards to lock all screws securely.

8.Pick up Top Jacket Panel from Jacket Carton.

9.Place the panel between side panels upper inside flanges and slide it forward, until top panel front flange U-bend locks over front panel top flange, and, top panel rear flange is positioned over rear jacket panel.

10.Locate/remove two #8 x ½” sheet metal screws from Hardware Bag.

11.Install both screws into top panel rear flange to secure the top panel to rear jacket panel.

K.External Electrical Enclosure Mounting.

1.Remove two #8 x ½” shoulder sheet metal screws and one #8 x ½” sheet metal screw from Hardware Bag.

2.Install both #8 x ½” shoulder sheet metal screws into Right Side Jacket Panel, at two upper corners of the panel front cutout.

3.Locate and remove External Electrical Enclosure assembly from Control Carton.

4.Remove the enclosure cover and set aside.

5.Pick Molex connector end of Burner Harness and feed it inside the enclosure, thru bushed hole at enclosure lower left corner, next to transformer/ relay.

6.Place the enclosure over installed shoulder sheet metal screws, so teardrop cutouts in the enclosure base engage both screws simultaneously, then, slide the enclosure downwards to lock it in place.

7.Install #8 x ½” sheet metal screw thru enclosure base lower hole, located to the right of transformer/ relay, into right side panel to secure the enclosure.

8.Plug-in burner harness Molex connector into dedicated burner harness receptacle inside the enclosure (lower left off transformer/relay). See “

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

9.Do not install the enclosure cover yet; proceed to control installation.

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