Vent System; Installing Exhaust Vent And Intake Air Vent - Baxi LUNA DUO-TEC 1.70 User Manual

4.

VENT SYSTEM

GENERAL
• Install the boiler / venting system in accordance with these instructions and with the National Fuel Gas Code, ANSIZ223.1/
NFPA 54, CAN/CSA B149.1, and/or applicable provisions of local building codes.
• This boiler is a direct vent appliance and category IV according to ANSI Z21.13/CSA4.9 standard.
EXHAUST VENT AND INTAKE AIR VENT
The intake and exhaust venting methods are detailed in this manual. Do not attempt to install the Boiler using any other means.
Be sure to locate the boiler such that the air intake and exhaust vent piping can be routed through the building and properly
terminated.
DANGER
Ensure the exhaust and intake vent piping comply with these instructions regarding the vent system. Inspect finished
combustion air intake and exhaust piping thoroughly to ensure all joints are well secured, airtight and comply with all
applicable code requirements, as well as with the instructions provided in this manual. Failure to provide a properly
installed vent system will cause severe personal injury or death.
WARNING
This vent system will operate with a positive pressure in the pipe. Do not connect vent connectors serving appliances
vented by natural draft into any portion of mechanical draft systems operating under positive pressure. Follow the
venting instructions below carefully. Failure to do so may result in severe personal injury, death, or substantial property
damage.
Do not use Foam Core Pipe or Cellular Foam Core Pipe in any portion of the venting from this boiler. Use of Foam Core
Pipe or Cellular Foam Core Pipe may result in severe personal injury, death, or substantial property damage.
• Determine exhaust vent location:
a) Refer to the illustration within this section 4.1.4: Flue Termination Location to determine clearances for the flue termination.
b) Provide a minimum of 1 ft / 0.30 m in the United States and 3.00 ft / 0.92 m in Canada from any door, operable window.
c) Provide a minimum of 1.00 ft / 0.30 m clearance from the bottom of the exhaust above the grade (snow removal may be
necessary to maintain clearance).
d) Provide a horizontal clearance of 3.00 ft / 0.92 m clearance from electrical meters, gas meter regulators and relief equipment.
In no case shall the exit terminal be above or below the aforementioned equipment unless the 3.00 ft / 0.92 m horizontal distance
is maintained unless the exit terminal is a minimum of 15 ft/4.6 m above the aformentioned equipment.
e) Do not locate the exhaust over public walkways where condensate could drip and/or freeze and create a nuisance or hazard.
f) When adjacent to a public walkway, locate exit terminal at least 7 ft / 2.13 m above grade.
g) Do not locate the exhaust directly under roof overhangs to prevent icicles from forming.
h) Provide a 6" / 152 mm clearance from the inside corner of vertical walls, chimneys, etc., as well as horizontal corners created
by roof overhangs.
• Determine air intake vent location.
a) Provide 1 ft / 0.30 m clearance from the bottom of the intake air vent to the grade.
b) Do not locate the intake air vent in a parking area where machinery may damage the pipe.
c) When venting with a two-pipe system, the minimum distance between exhaust vent and intake air vent on a single boiler is 4
3/4" / 120.00 mm center-to-center.

INSTALLING EXHAUST VENT AND INTAKE AIR VENT

DANGER
Ensure that the flow of combustion and ventilation air are not obstructed.
BAXI urges users to install CO detectors in buildings where the boiler is located, even though such detectors may not
be required by local code. CO detectors should be calibrated regularly as specified by the manufacturer.
Note:
Venting should be supported approximately every 39 3/8" / 1 m. Supports should be fixed along the connection point of each pipe.
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