34
VENTING INSTRUCTIONS
The Vent Termination Must Be Located:
1.
With a 2" (5.1 cm) clearance to combustible materials.
A.
4 feet minimum above the ridge (see
B.
fig. 17
).
Vent air intake must be 2' (61 cm) below vent outlet and facing away from the exhaust outlet (see
C.
fig. 17,18
).
Use vent pipe manufacturer's vent cap fire stop, support collar, roof flushing, and storm collar.
D.
Install a vertical vent drain tee (see
E.
fig. 15
). Also see the section explaining condensate drain installation.
Fill the 3/8 flexible tubing with water before firing the boiler.
F.
Configuration of vent air intake (see
2.
figure. 16
).
Vent Pipe Lengths
Vent Pipe Diameter: 3" (7.6 cm)
t
Max Vent Length: 30 ft (914 cm) with (1) vertical drain tee, (1) 90° Elbow and (1) Termination Cap. 5 Ft (152 cm) Max
t
Horizontal.
Minimum Vent Length: 2 ft (61 cm)
t
Inlet Pipe: 30 ft (914 cm) Max, 2 ft (61 cm) Min, (4) 90 ° Elbows (including intake 90° Elbow on Roof.)
t
INSTALLATION PROCEDURE FOR VERTICAL VENTING
!
WARNING
do not insulate or other wise wrap vent pipe or fit-
tings. Follow the vent pipe manufacturers installation
instructions for vertical venting.
NOTICE
Boiler installation must use 90° elbow off boiler for
horizontal run to the vertical drain tee.
Figure 15 - Vertical Drain Tee
Figure 16 - Vent Air Intake
National Excelsior Company
www.excelsiorhvac.com
Subject to change without notice.
