Smith Cast Iron Boilers 19A SERIES Combustion and Ventilation AIR, Assembly of Sections

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19A SERIES BOILER

INSTALLATION INSTRUCTIONS

5.COMBUSTION AND VENTILATION AIR

An adequate supply of air for the boiler room must be provided to allow complete combustion of fuel and ventilation of the room to avoid excessively high ambient temperature. Air inlet by natural ventilation directly from the outside shall have total free area of not less than one sq. in. per 14,000 BTU per hour of input of all fuel burning appliances in the boiler room.

Where combustion air must be obtained through ducts, see ANSI/NFPA 31 or ANSI Z223.1 for requirements.

If mechanical combustion air supply is required, the system must be approved by the local authorities, and should provide at least 30 CFM per gallon of oil and 0.25 CFM per MBH of gas input to the boilers.

Ventilation air, if required, must be in addition to the combustion air quantities called for above.

6.ASSEMBLY OF SECTIONS

When boilers are delivered to the job site, each item should be inspected closely for possible shipping damage. Scars or nicks in the port sealing surfaces may allow leakage. Do not attempt to use any section that has been damaged in the port seal area.

When ready to commence assembly, recommended on a level pad, place the angle rails in position parallel with each other with the 2" legs on the floor and measuring 25-21/32 inches outside dimension. Be sure to align the center of the boiler with the center line of the pad. If no pad is provided, shim and grout under the angles to make them level and provide support along the full length. See FIGURE 1. Clean hydronic gasket recesses and rope groove with a wire brush, taking care not to damage machine surface.

CAUTION

Due to the fact that the sections are top heavy, it is absolutely necessary that the back section be supported in such a manner as to prevent its falling and causing potential serious bodily injury while preparing to add the next section. One such way would be to insert a piece of 3" x 36" piping in the lower port.

NOTE

Some sections may need shims under support feet to align with other sections.

Stand the back section in place with the feet on and in the angle iron rails. Support the section as required to prevent it from falling forward or rearward. Clean hydronic gasket recesses and rope groove with a stiff wire brush. Apply spray-on adhesive (supplied with the boiler) to rope groove to hold wicking in place during assembly.

CAUTION

Do not spray adhesive into the hydronic seal ports.

Apply a length of wicking avoiding bends and twists. Be sure ends extend past the cleanout cover opening. (See FIGURE

2)Place the upper and lower hydronic seals in the recessed section taking care not to dislodge the rope or the hydronic seals. Inspect the alignment of the sections through the open ports and, if properly aligned, install the draw rods with nuts drawn hand-tight. (See FIGURE 3.) Plumb the sections before applying torque to the upper right and lower left draw rods. Maintain finger-tight torque on upper left and lower right draw rods.

See TABLE 2 for proper location of sections.

TABLE 2

3 SECT	F	H	B
4 SECT	F	P	H	B
5 SECT	F	H	P	H	B
6 SECT	F	P	H	P	H	B
7 SECT	F	H	P	H	P	H B

CLEANOUT COVER

LOWER PORT

HEATING SURFACE

UPPER PORT

CERAMIC ROPE JOINT SEAL

FLOOR

8 SECT

F

P

H

P

H

P

H

B

9 SECT

F

P

H

P

H

P

H

P

B

10 SECT

F

P

P

H

P

H

P

H

P

B

11 SECT

F

P

P

P

H

P

H

P

H

P

B

12 SECT

F

P

P

P

P

H

P

H

P

H

P

B

F = Front Section

P = Plain intermediate section

H = Heater intermediate section-Optional, must be ordered. B = Back Section

SECTIONAL VIEW

FIGURE 2

IMPORTANT

The upper and lower ports should be drawn up metal to metal around the outside of the hydronic seal. Metal to metal conditions will not occur at any other location. Avoid excessive torque on upper left and lower right draw rods, which may warp the section. See FIGURE 3 for correct alignment of the seal.

Assemble additional sections as described above.

After draw rods are hand tight, torque as shown in TABLE 3.