Venting - Burnham 8HE Series Installation, Operating And Service Instructions

5

Venting

A. Install vent system in accordance with local
building codes; or local authority having
jurisdiction; or National Fuel Gas Code, ANSI
Z223.1/NFPA 54. Install any of the following for
this Category I, draft hood equipped appliance:
1. Type B or Type L gas vent. Install in
accordance with listing and manufacturer's
instructions.
2. Masonry or metal chimney. Build and install in
accordance with local building codes; or local
authority having jurisdiction; or Standard for
Chimneys, Fireplaces, Vents, and Solid Fuel
Burning Appliances, ANSI/NFPA 211.
Masonry chimney must be lined with approved
clay flue lining or listed chimney lining system.
3. Single wall metal vent. Allowed by ANSI
Z223.1/NFPA 54 under very restrictive
conditions.
B. Avoiding Flue Gas Condensation
!
WARNING
• Vent systems must not experience signs of
continuous wetness.
• Masonry chimneys, and in particular external
masonry chimneys, are more susceptible to the
formulation of condensate. If a masonry chimney
experiences signs of continuous wetness, a
listed metal liner must be installed or an alternate
vent system must be used.
• All masonry chimneys must use either a clay tile
liner or listed metal liner.
• Recommend use of listed metal chimney liner
with external masonry chimneys.
• For external masonry chimneys that do not
include a listed metal chimney liner, recommend
double wall vent connectors. Use only double
wall material on long runs.
• See also Section 3, Water Trim and Piping, for
methods to avoid flue gas condensation from low
return water temperatures.
C. Inspect chimney and remove any obstructions
or restrictions. Clean chimney if previously used
for solid or liquid fuel-burning appliances or
fireplaces.
!
DANGER
Inspect existing chimney before installing boiler.
Failure to clean or replace perforated pipe or tile
lining will cause severe injury or death.
24
8HE Installation, Operating & Service Instructions
D. Install Draft Hood on canopy outlet. Maintain
height from Jacket Top Panel to Draft Hood skirt
as shown in Figure 1-1. DO NOT ALTER, CUT, OR
MODIFY DRAFT HOOD.
!
WARNING
Do not alter boiler draft hood or place any
obstruction or non-approved damper in the
breeching or vent system. Flue gas spillage can
occur. Unsafe boiler operation will occur.
E. Install Blocked Vent Switch. The Blocked Vent
Switch Assembly consists of a strain relief
bushing, power cord, and switch attached to
mounting bracket. On Packaged boilers, the
assembly is shipped attached to top of boiler. On
Knocked Down boilers, the assembly is located in
Combination Boiler Parts and Control Carton.
1. Uncoil power cord.
2. Position mounting bracket onto lower edge of
Draft Hood skirt. Locate center tooth (with #10
sheet metal screw) on outside and other two
teeth inside Draft Hood skirt. See Figure 5-1.
3. Slide mounting bracket tight against lower
edge of Draft Hood skirt. Position #10 sheet
metal screw above skirt's stiffening rib.
Figure 5-1: Blocked Vent Switch Installation
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