AERCO AM Series Boiler User Manual - Manual (Page 63)

AM Series Boilers and Water Heaters
CHAPTER 3 – INSTALLATION
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3.16.3 Min/Max Allowable Combustion Air and Vent Piping Lengths
The maximum length of the two pipes vent system is 120 equivalent feet (air intake plus flue
exhaust). However, each single pipe can’t be longer than 60 feet.
Each 45° elbow inserted in the venting system has a loss of pressure equivalent to 3 feet of
linear pipe
Each 90° elbow inserted in the venting system has a loss of pressure equivalent to 6 feet of
linear pipe.
The minimum length of the venting system is 1 foot (357 mm).
3.16.4 General Venting and Combustion Air Piping Installation
The unit must be vented and supplied with combustion and ventilation air as described in this
section. Ensure the vent and air piping and the combustion air supply comply with these
instructions regarding vent system, air system, and combustion air quality. Inspect finished vent
and air piping thoroughly to ensure all are airtight and comply with the instructions provided and
with all requirements of all applicable codes. Failure to provide a properly installed vent and air
system will cause severe personal injury or death.
Using vent materials other than those listed in Table 3-3 and Table 3-4, failure to properly seal
all seams and joints, mixing of venting materials or failure to follow vent pipe and fittings
manufacturer’s instructions can result in injury, death or property damage.
Table 3-3: Approved Venting Materials
3.16.5 Specific Vent and Combustion Air Installations
The air inlet pipe(s) must be sealed. Improper sealed can result in excessive levels of carbon
monoxide.
Choose acceptable combustion air inlet pipe materials from the following list:
• PVC, CPVC or ABS
• AL29-4C, stainless steel material to be sealed to specification of its manufacturer.
• Polypropylene material to be sealed to specification of its manufacturer.
Using air intake materials other than those specified, mixing the specified materials, failure to
properly seal all seams and joints or failure to follow the manufacturer’s instructions can result in
flue gas recirculation, spillage of flue products and carbon monoxide emissions.