Operation Manual

70
GT 530A DDR_G30A/AE _IO_V4.0 09/2013
Gas Vent Category I - High Temperature Operation Applications:
Consult a chimney-venting specialist or professional engineer for the sizing of the breeching and main chimney in
accordance to local and national gas codes CSA B149.1-05 & ANSI Z223.1 (NFPA 54) and sized accordingly to the
appropriate tables or methods of chimney vent sizing as local jurisdiction will accept.
1. An approved type “B or L” vent may be used under these operating conditions.
a. Category I - Negative breeching pressure range from 0 to -0.09 inches water column [0 to 0.22 mbar]
b. Return water temperature is greater than 140°F [60°C]
c. The flue gas temperature is greater than 252°F [122°C] to a maximum of 473°F [245°C]
d. Double acting draft control device may be employed, but is not necessary for correct operation of the boiler.
Consult a chimney-vent specialist for the correct usage and application.
Application Note: If a barometric draft control is not used it is mandatory that a vent safety device, either equipped
on burner or venting (gas, combustion head or vent pressure switch, WMO-1 vent safety switch or FTS-6 spill
switch).
Gas Vent Category III - High Temperature Operation Applications:
The vent shall be sized by a chimney venting specialist or professional engineer using methods or vent calculations
that are acceptable to National and local codes having jurisdiction.
2. Listed Industrial Type Factory Built Chimney system. Listed Type BH Class I/II 245C maximum, or special vent
system fabricated from AL29-4C® or SS316L.
a. Category III – Positive breeching pressure range from 0 to +0.20 inches water column [0 to 0.50mbar]
b. The vent shall be sized by a chimney venting specialist or professional engineer using methods or vent
calculations that are acceptable to National and local codes having jurisdiction. A maximum 16 ft. [5m]
horizontal breeching length to the main chimney TEE fitting. The vent shall then extend vertically 5 ft.
[1.5m] minimum to a 246 ft. [75m] maximum, through the ceiling roof.
c. Return water temperature is greater than 140°F [60°C]
d. The flue gas temperature is greater than 252°F [122°C] to a maximum of 473°F [245°C]
e. Do not use any barometric draft control on positive vent pressure systems as flue gas spillage will
contaminate inside air quality.
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)
Oil or Dual Fuel Applications:
a. Listed Industrial Type Factory Built Chimneys system or special vent system fabricated from AL29-4C® or
SS316L sized in accordance to the appropriate table in the CSA B139-00 or NFPA 31.
b. Negative breeching pressure range from 0 to -0.09 inches water column [0 to 0.22 mbar]
c. A single acting draft control device may be employed as required, but is not necessary for correct operation
of the boiler. Consult a chimney-vent specialist for the correct usage and application.
Application Note: If a barometric draft control is not used it is mandatory that a vent safety device, either equipped
on burner or venting (gas, combustion head or vent pressure switch, WMO-1 vent safety switch or FTS-6 spill
switch).
Gas Vent Category II, III & IV - Low Temperature Operation Applications:
These vent systems shall be sized by a chimney venting specialist or professional engineer using methods or vent
calculations that
are acceptable to National and local codes having jurisdiction Listed Industrial Type Factory Built Chimney system.
1. Listed Type BH Class I/II 245C maximum, or special vent system fabricated from AL29-4C® or SS316L.
2. The vent shall then extend vertically 5 ft. [1.5m] minimum to a 246 ft. [75m] maximum, through the ceiling
roof.
3. Condensate drain TEE tting shall be provided on the boiler breeching as close a practical to avoid any
accumulation of ue gas condensation
4. Follow the vent manufacturers recommended and supplied instructions regarding, vent connection cleaning,
sealing, supporting.
5. Category II - Negative breeching pressure range from 0 to -0.09 inches water column [0 to 0.22mbar]
6. Category III & IV – Positive breeching pressure range from 0 to +0.20 inches water column [0 to 0.50mbar]
7. Do-not use a barometric draft control on positive vent pressure systems as ue gas spillage will contaminate the
inside air quality.