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De Dietrich GT 530A Series Manual

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GT 530ADDR_G30A/AE _IO_V4.0 09/2013
Application Note: it is mandatory that a vent safety device be employed, either equipped on burner or venting (gas,
combustion head or vent pressure switch)
APPLICATION NOTE: (Other than Sidewall or Direct Vent, sealed combustion air applications)
All venting systems must be sized by experienced venting specialists using available codes or by acceptable
engineering methods,
a nal sizing sheet of the venting and calculation must show how the venting was sized and designed. A nal
approval by local
authorities is advised. The calculation sheet shall be secured and a copy provided on site.
WARNING-CAUTION: (General Venting)
• For low temperature operating applications, it is recommended to use vent types ‘BH’ (AL29-4C®) or SS316L,
provided the venting is listed to ULCS636-1995 or UL 1738 or as stipulated in CSA B149.1-05 or ANSI Z223.1/
NFPA 54 Type ‘BH’ Class I/II-245C maximum. Consult a qualied venting supplier/specialist for assistance in
sizing and selections of suitable venting.
• Do not puncture or drill holes in the chimney or venting unless as described by the venting manufacturer printed
instructions.
• The chimney must be nished with a rain cap or nishing cone and must provide suitable protection against
rain, downdrafts, birds and rodents.
• Pipe the condensate drain separately to a oor drain or condensate pump/sump.
• Use only materials that are designed and acceptable for use with condensate for the condensate piping.
• Each condensate drain must contain an (P-Trap) anti-siphon/pigtail to prevent the ue gas ow through the
condensate piping.
• Consult local authorities and national codes regarding the disposal of ue gas condensate into public waste
water system.
• Flue gas condensate is very aggressive and corrosive, which could lead to failure of the venting system or
drains.
• Do not install any ttings in the condensation lines.
• The ue gas condensation may require a neutralization system before entering the drain. Consult a chemical
treatment company for neutralizer system.
• If a ue gas condensation neutralization system has been installed, a posted routine inspection schedule shall
be posted for periodic monitoring and cleaning of the condensate collection and disposal system. Routine
inspections shall determine that there is no blockage in the condensate ttings or lines and that the condensate
ows freely on a daily basis. Condensation neutralization materials requires replenishing, the PH level shall be
maintained around 7 (neutral). Consult a water chemical specialist for application and maintenance assistance.
• Any horizontal portions of the breeching or main chimney must be sloped upwards ¼” per linear foot [21mm/m]
from the boiler to the vent terminal.
• The boiler requires a vent system that will produce sufcient draft at all times to ensure safe and correct
operation of the boiler. The vent system must exhaust all ue gases to the outside in a safe and effective
manner.
• An improperly sealed venting system could result in carbon monoxide (CO) poisoning. Ensure adequate support
and fastening of the vent system, according to the vent manufacturers recommended or supplied instructions
for proper support, fastening and sealing requirements.
• Co-venting with other appliance shall conform to NFPA 54/ANSI Z223 or CSA B149.1-05 gas installation code
and sized in accordance to the appropriate table in Annex C. as applicable. Any unused opening must be sealed.
• Any improper operation of the venting system shall be corrected.
• Operating the De Dietrich GT Series boiler at low return/supply temperatures will cause a reduction of
the ue gas temperature, creating excessive wet-vent periods or ue gas temperatures nearing the dew
point temperature. In these applications the venting material must be able to resist corrosion of ue gas
condensation.
… 71 …


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