Contents - DeDietrich GT 530A Series Assembly, Installation And Service Manual

Boiler breeching and main chimney
De Dietrich GT Series boilers are a high performance
boiler. The flue gas temperature can be less than 320°F
[160°C]. Special attention is required for the venting
of the boiler according to the specific site operating
conditions.
WARNING
The De Dietrich boiler can be operated at low flue
gas temperatures. As a result flue gas condensation
may occur and could accumulate in the breeching
and main chimney. Suitable provision for flue gas
condensation draining is required. A condensate TEE
fitting shall be provided on the main chimney as close
as possible to the boiler breeching collar (See fig
8553N143). Any horizontal portion of the breeching
shall be kept to minimum.
A vent category chart has been provided to further
assist the heating specialist to determine and evaluate
whether the correct venting is applied for each gas vent
category.
678
500
456
412
368
324
280
236
192
148
104
60
DDR_G30A/AE _IO_V4.0 09/2013
Venting
Gas-Fired Appliance Vent Categorization
[According to ANSI Z21.13/CSA 4.9 Gas Boiler Standard]
Carbon Dioxide [CO
91 01 11
Category I Appliance
(Negativev ent pressure)
A, B,L [C b reeching o nly]
Category I I Appliance
(Negativev ent pressure)
AL29-4C®o r 316SS
Chimney-Vent P ressure
Negative
] Content %
2
21 11 0 987
Category III Appliance
(Positivev ent pressure)
AL29-4C®o r 316SS
Category I V Appliance
(Positivev ent pressure)
AL29-4C®o r 316SS
Positive
GT 530A
6
260
236
211
187
162
138
113
89
64
40
15
69