Burnham V9A - Manual (Page 15)

15
WARNING
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
finished face of section, when nipple is properly
driven. See Figure 6.
Figure 6: Setting of Nipples
NOTICE
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 “Identification
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,
fill the groove in this section with silastic sealant.
Touch-up any missed spots before draw-up.
Touch-up after draw-up has no value.
WARNING
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: Affixing the Fiberglass Rope
h. Remove a 96” length of fiberglass rope from
the assembly carton. Starting with the area
around the upper 7” nipple port, firmly 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 affix 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 filled.
See Figure 7.