Whirlpool Gold WGFD295 Installation Instructions Manual page 10

WARNING
Possiblility of property damage, personal injury or death.
Damaging condensation can occur inside masonry
Goodman 69
chimneys when a single fan-assisted Category I appliance
(80% AFUE furnace) is vented without adequate dilution
air. Do not connect an 80% furnace to a masonry chimney
unless the furnace is common vented with a draft hood
equipped appliance or the chimney is lined with a metal
liner or Type B metal vent. All installations using masonry
chimneys must be sized in accordance with the
appropriate venting tables. If an 80% furnace is common
vented with a draft hood equipped appliance, the potential
for condensation damage may still exist with extremely
cold conditons, long vent connectors, exterior chimneys
or any combination of these conditions. The risk of
condensation damage is best avoided by using the
masonry chimney as a pathway for properly-sized metal
liner or Type B metal vent.
Typical Multiple Flue Clay Tile Chimney
A
R
Mult Flue Clay Chimney
G 2009
Q
P
O
N
M
A. Crown G. Second floor
B. Wash H. First floor
C. Roof line I. Water heater vent
connector
D. Clay tile size: 8" x 8" x
12" (24.3 cm x 24.3 cm J. Natural draft water
x 30.5 cm) (each x 24" heater
[61 cm] length)
K. Basement floor
E. Attic floor
L. Fan-assisted
F. ¹⁄₂ " to 1 " (1.3 cm to
forced air furnace
2.5 cm) air space
10
B
C
D
E
F
G
H
I
J
K
L
M. Forced air furnace
vent connector
N. Clean out
O. Breech
P. Damper
Q. Throat
R. Clay tile size:
generally 12" x 12"
(30.5 cm x 30.5 cm)
(24" [61 cm] length)
Checklist Summary
This checklist serves as a summary of the items to be checked
before venting an 80+ furnace into a masonry chimney. In
addition, we recommend that a qualified serviceman use this
checklist to perform a yearly inspection of the furnace venting
system.
This checklist is only a summary. For detailed information on
each of the procedures mentioned, see the paragraph referenced
with each item.
This inspection is based upon a draft topical report, "Masonry
Chimney Inspection and Relining," issued by the Gas Research
Institute. While not yet finalized, we believe this report represents
the best information on this subject which is currently available.
Proper chimney
termination?
(Check 1)
Yes
Chimney channel
free of solid and
liquid fuel
appliances?
(Check 2)
Yes
Crown in good
condition?
(Check 3)
Flowchart
G
Yes
2009
Cleanout free of
debris?
(Check 4)
Yes
Liner in good
condition?
(Check 5)
Yes
Dilution air
available?
(Check 6)
Yes
Complete the
installation.
(Check 7)
Check 1—Proper Chimney Termination
A masonry chimney used as a vent for gas-fired equipment must
extend at least 3 ft (91.4 cm) above the highest point where it
passes through the roof. It must extend at least 2 ft (61 cm)
higher than any portion of a building within a horizontal distance
of 10 ft (3 m). In addition, the chimney must terminate at least 3 ft
(91.4 cm) above any forced air inlet located within 10 ft (3 m). The
chimney must extend at least 5 ft (1.5 m) above the highest
connected equipment draft hood outlet or flue collar.
Line, terminate with
No listed vent cap
(Fix 1)
Change venting
No arrangements
(Fix 2)
Rebuild crown
(Fix 3)
No
and/or reline
(Fix 4)
Reline
No
(Fix 4)
Reline
No
(Fix 4)
Reline
No
(Fix 4)