Burnham BOILERS Instruction Manual download pdf (Page 16)

Nipples must be driven in evenly and to the

proper depth to assure tight joints. Most

nipple leaks are caused by tilted or cocked

nipples.

DO NOT use steel/iron head hammer to drive

nipples without using a wood block. Nipple

damage may result.

g. A special nipple setting gauge is provided for the

nipples. Gauge nipple at 90° angles to insure

that it is driven to the proper depth into the

nipple opening (nipple port). Cut-out in gauge

must rest on nipple, with legs of gauge touching

nished face of section, when nipple is properly

driven. See Figure 6.

Figure 6: Setting of Nipples

The sections must be assembled according to the

arrangement shown to ensure proper operation,

proper assembly of canopy, jacket and alignment

of piping and tankless heaters with jacket

knockouts. Start with the back section and work

towards the front.

i. From the “Section Arrangement” chart, select

the next section according to the “Identication

Code” at the top of the chart. See Figure 8. Use

a wire brush to clean the groove in the face

of the next section. Then, using a cartridge of

RTV 6500 or RTV 736 sealant in a caulking gun,

ll the groove in this section with silastic sealant.

Touch-up any missed spots before draw-up.

Touch-up after draw-up has no value.

Sections must be drawn-up tight immediately

after properly applying sealant for best results.

Although sections may be joined within two

(2) hours of applying sealant, humidity and

temperature affect cure time. If a “thick skin”

has been formed on the sealant bead, remove

and re-apply sealant.

Sealant must be properly applied to ALL boiler

joints. Failure to properly seal the boiler joints

will result in combustion gas leaks through the

joint. DO NOT operate boiler with combustion

gas leaks.

Figure 7: Afxing the Fiberglass Rope

h. Remove a 96” length of berglass rope from

the assembly carton. Starting with the area

around the upper 7” nipple port, rmly press

the rope into the groove, so that the adhesive

holds it in place. (If more than 25 minutes have

passed since the adhesive was applied, it may

be necessary to reapply.) Continue to afx the

rope to the groove in this fashion around the

perimeter of the section. Make sure that the rope

does not droop or hang outside of the groove.

When the end of the groove is reached, cut off

the excess rope. Push the length of excess rope

into the groove at the top corner of the section

face (opposite of the 7” nipple port.) Cut off and

discard any remaining rope after groove is lled.

See Figure 7.

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Burnham BOILERS Instruction Manual Page 16

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