Lennox GCWB95W-150 Installation Instructions

16
240012994 Rev. B [08/31/2020]
1-3/4" (45mm)
3/4" (19mm)
5 - COMBUSTION AIR AND VENT PIPING
5.6 Coaxial Venting Instructions
Maximum equivalent ue lengths for Coaxial venting are:
Coaxial Elbows - Equivalent length
4"/2" [100 mm/60 mm]
45° 1.64 ft. [0.5 m]
90° 3.28 ft. [1.0 m]
5” / 3” [128 mm/80 mm]
45°
1.64 ft. [0.5 m]
90° 3.28 ft. [1.0 m]
Coaxial Termination - Equivalent length 3 ft (0.9m)
NOTE: Coaxial venting can run horizontal or vertical.
The following instructions are for Natalini pipe, if using another
approved manufacturer follow their venting instructions.
• Connect ue elbow to top of boiler and adjust direction of
elbow to desired orientation (rear, right or left).
• Measure distance from outside wall face to elbow, this
dimension will be known as 'X", add distance "Y" + 2" (60
mm) to "X" this is the total dimension of the vents. See
Figure 5-3.
• Mark dimension from above on outer aluminum intake
vent. Measure length of waste material, and transfer
dimension to inner grey ue pipe.
• Remove waste from both vents (ue and air). Verify cut
ends are square and free from burrs. Insert ue back into
intake air vent and pass them through hole in wall.
• Check all measurements before cutting. Clearance to
combustible materials is zero when using coaxial vent
system.
• After installing venting use calibrated analyzer to verify
there is no recirculation of combustion.
• Ensure termination is positioned with slots at the bottom.
Figure 5-2 - Coaxial Screw Placement
5.4 Coaxial Vent Screw Placement - See Figure 5-2
Two (2) screws shall be fastened through the outer intake pipe
behind the gaskets at equal distances, approximately 180°
apart. Note the screws used must be no larger than No. 8-3/4
sheet metal screws and must be zinc coated.
WARNING
Asphyxiation hazard. Before securing the screws
ensure the pipe has been pushed in a minimum of
1-3/4" (45 mm) into the gasketed end of the other
pipe. Failure to follow these instructions could result in
death or serious injury.
!
FIGURE 5-3 - Coaxial Venting Horizontal or Vertical
CAN BE USED ON ALL SIZES
Coaxial Pipe Vent Lengths
(Includes First Elbow And Termination)
Boiler Size 150 205 ALL
Vent Size
4"/2"
[100mm/60mm]
5"/3"
[128mm/80mm]
ALL
Maximum
Minimum
Natalini 32.8 ft [10m]
32.8 ft [10m]
6 ft.
[1.8m]
DuraVent 27.88 ft [8.5m]
Centrotherm 24.60 ft [7.5m]
WT = Wall Thickness
Note: 2" is insertion depth of straight pipe to elbow.
2"
2"

Lennox GCWB95W-150 Specifications

General

Brand	Lennox
Model	GCWB95W-150
Category	Boiler
Language	English