Finned copper tube gas boilers & water heaters – Boiler Manual
4
Combustion air contaminated with fluorocarbons or
other halogenated compounds such as cleaning
solvents and refrigerants will result in the formation
of acids in the combustion chamber. These acids will
cause premature failure of the boiler/water heater
voiding the warranty!
If the boiler/water heater is operated while the building
is under construction it MUST be protected from
wood, concrete, sheet rock and other types of dust.
Failure to properly protect the unit from construction
dust will damage the unit voiding the warranty!
Buildings will require the installation of a fresh air duct or other
means of providing make-up air if the intake air option isn’t used.
Any building utilizing other gas burning appliances, a fireplace, wood
stove or any type of exhaust fan must be checked for adequate
combustion air when all of these devices are in operation at one
time. Sizing of an outside air duct must be done to meet the
requirements of all such devices.
Never operate the LCD in an environment subjected to
a negative pressure unless the air intake is connected to
the outdoors. Failure to comply with this warning can
result in excessive levels of carbon monoxide causing
severe personal injury or death!
All Air From Inside The Building
If the LCD is to be located in a confined space the minimum clearances
listed in Table 1 must be maintained between it and any combustible
construction. When installed in a confined space
without the
intake air option
, Figures 1, 2 & 3, two permanent openings
communicating with an additional room(s) are required. The
combined volume of these spaces must have sufficient volume to
meet the combustion air requirements of all gas utilization equipment.
Fireplaces, wood stoves or any type of exhaust fan must be considered
when making this determination. Each opening must have a minimum
free area of
1 in
2
/1000
Btu/hr
,
2200 mm
2
kW
based on the total
input rating of ALL gas utilization equipment in the confined area.
Each opening must be no less than
100
in
2
,
64,516 mm
2
in size. The
upper opening must be within
12 in
,
305 mm
of, but not less than
3 in
,
76 mm
from, the top of the enclosure. The bottom opening
must be within
12 in
,
305 mm
of, but not less than
3 in
,
76 mm
from, the bottom of the enclosure.
Figure 1
Vertical venting with a metal chimney system
and inside air
10 FT
