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8. Install the chimney top with the four screws retained
from step 6 onto the new chimney transition bottom from
the transition bottom kit.
9. Install chimney assembly with the three screws retained
from step 5 onto the induced draft blower.
10. Reinstall the induced draft blower rotating it 90 degrees
clockwise from the original upflow configuration using
the four screws retained in step 3. Ensure the gasket
located between the induced draft blower and the collector
box is rotated accordingly.
11. Reconnect the induced draft blower power leads. NOTE:
If the wires are not long enough, pull extra wire from the
wire bundle in the blower compartment.
12. Reconnect the flue pipe, and the pressure switch tubing.
Ensure that all wires and the pressure switch tubing is
at least one inch from the flue pipe, or any other hot
surface.
13. Restore power to furnace.
Counterflow units are shipped with the induced draft blower
discharging from the top of the furnace. ("Top" as viewed for a
counterflow installation.)
Vent the furnace in accordance with the National Fuel Gas
Code NFPA54/ANSI Z223.1-latest edition. In Canada, vent the
furnace in accordance with the national standard of Canada,
CAN/CSA B149.1 and CAN/CSA B149.2- latest editions and
amendments.
N
EVER
ALLOW
THE
PRODUCTS
,
MONOXIDE
TO
ENTER
THE
RETURN
.
SUPPLY
E
M
XTERIOR
ASONRY
(C
I F
ATEGORY
URNACES
An exterior masonry chimney is defined as a "Masonry" chim-
ney exposed to the outdoors on one or more sides below the
roof line." The ability to use a clay lined masonry chimney
depends on a parameter not associated with interior chimneys.
This variable is the geographic location of the installation. Re-
searchers have discovered that the winter design temperatures
have a direct impact on the suitability of this type of venting. In
most situations, the existing masonry chimneys will require a
properly sized metallic liner.
WARNING
,
OF
COMBUSTION
INCLUDING
CARBON
DUCTWORK
OR
CIRCULATION
C
HIMNEYS
O
)
NLY
P
OSSIBILITY
OF
PROPERTY
DAMAGING
CONDENSATION
WHEN
A
SINGLE
)
FURNACE
IS
VENTED
80%
CONNECT
AN
FURNACE
IS
COMMON
APPLIANCE
OR
THE
. A
METAL
VENT
LL
SIZED
IN
ACCORDANCE
80%
FURNACE
IS
,
APPLIANCE
THE
EXIST
WITH
EXTREMELY
EXTERIOR
CHIMNEYS
T
HE
RISK
OF
CONDENSATION
MASONRY
CHIMNEY
T
B
OR
YPE
METAL
AIR
Clean Out
Typical Multiple Flue Clay Tile Chimney
C
S
HECKLIST
UMMARY
This checklist serves as a summary of the items to be checked
before venting an 80+ furnace into a masonry chimney. In addi-
tion, we recommend that a qualified serviceman use this check-
list to perform a yearly inspection of the furnace venting sys-
tem.
This checklist is only a summary. For detailed information on
each of the procedures mentioned, see the paragraph refer-
enced 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 repre-
sents the best information on this subject which is currently
available.
11
WARNING
,
DAMAGE
PERSONAL
CAN
OCCUR
INSIDE
‐
C
I
FAN
ASSISTED
ATEGORY
APPLIANCE
WITHOUT
ADEQUATE
DILUTION
FURNACE
TO
A
MASONRY
CHIMNEY
VENTED
WITH
A
DRAFT
HOOD
CHIMNEY
IS
LINED
WITH
A
METAL
INSTALLATIONS
USING
MASONRY
WITH
THE
APPROPRIATE
COMMON
VENTED
WITH
A
DRAFT
POTENTIAL
FOR
CONDENSATION
,
COLD
CONDITIONS
LONG
,
OR
ANY
COMBINATION
OF
DAMAGE
IS
BEST
AVOIDED
AS
A
PATHWAY
FOR
PROPERLY
.
VENT
Wash
Clay Tile Size: 8" x 8" x12"
(Each x 24" Length)
Attic Floor
1/2" to 1" Air Space
Second Floor
Throat
Damper
First Floor
Breech
F.A.F. Vent
Connector
Fan Assisted
Forced Air
Furnace
INJURY
OR
DEATH
MASONRY
CHIMNEYS
(80% AFUE
. D
AIR
O
NOT
UNLESS
THE
EQUIPPED
T
B
LINER
OR
YPE
CHIMNEYS
MUST
BE
. I
VENTING
TABLES
F
AN
HOOD
EQUIPPED
DAMAGE
MAY
STILL
,
VENT
CONNECTORS
.
THESE
CONDITIONS
BY
USING
SIZED
METAL
LINER
Roof Line
Water Heater
Vent Connector
Natural Draft
Water Heater
Basement Floor
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