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Goodman Mfg VC8 Manual De Usuario

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11
E
XTERIOR
 
MASONRY
 C
HIMNEYS
 - C
ATEGORY
 I F
URNACES
 O
NLY
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
 
OF
 
COMBUSTION
, 
INCLUDING
 
CARBON
 
MONOXIDE
, 
TO
 
ENTER
 
THE
 
RETURN
 
DUCTWORK
 
OR
 
CIRCULATION
 
AIR
 
SUPPLY
.
WARNING
E
XTERIOR
 M
ASONRY
 C
HIMNEYS
  (C
ATEGORY
 I F
URNACES
 O
NLY
)
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.
P
OSSIBILITY
 
OF
 
PROPERTY
 
DAMAGE
, 
PERSONAL
 
INJURY
 
OR
 
DEATH
 
DAMAGING
 
CONDENSATION
 
CAN
 
OCCUR
 
INSIDE
 
MASONRY
 
CHIMNEYS
 
WHEN
 
A
 
SINGLE
 
FAN
‐
ASSISTED
 C
ATEGORY
 I 
APPLIANCE
 (80% AFUE 
FURNACE
) 
IS
 
VENTED
 
WITHOUT
 
ADEQUATE
 
DILUTION
 
AIR
. D
O
 
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
 T
YPE
 B 
METAL
 
VENT
. A
LL
 
INSTALLATIONS
 
USING
 
MASONRY
 
CHIMNEYS
 
MUST
 
BE
 
SIZED
 
IN
 
ACCORDANCE
 
WITH
 
THE
 
APPROPRIATE
 
VENTING
 
TABLES
. I
F
 
AN
 
80% 
FURNACE
 
IS
 
COMMON
 
VENTED
 
WITH
 
A
 
DRAFT
 
HOOD
 
EQUIPPED
 
APPLIANCE
, 
THE
 
POTENTIAL
 
FOR
 
CONDENSATION
 
DAMAGE
 
MAY
 
STILL
 
EXIST
 
WITH
 
EXTREMELY
 
COLD
 
CONDITIONS
, 
LONG
 
VENT
 
CONNECTORS
, 
EXTERIOR
 
CHIMNEYS
, 
OR
 
ANY
 
COMBINATION
 
OF
 
THESE
 
CONDITIONS
. 
T
HE
 
RISK
 
OF
 
CONDENSATION
 
DAMAGE
 
IS
 
BEST
 
AVOIDED
 
BY
 
USING
 
MASONRY
 
CHIMNEY
 
AS
 
A
 
PATHWAY
 
FOR
 
PROPERLY
 
SIZED
 
METAL
 
LINER
 
OR
 T
YPE
 B 
METAL
 
VENT
.
WARNING
Wash
Clay Tile Size: 8" x 8" x12"
(Each x 24" Length)
1/2" to 1" Air Space
Second Floor
First Floor
Attic Floor
Roof Line
Throat
Damper
Breech
Clean Out
Fan Assisted
Forced Air
Furnace
Natural Draft
Water Heater
Water Heater
Vent Connector
Basement Floor
F.A.F. Vent
Connector
Typical Multiple Flue Clay Tile Chimney
C
HECKLIST
 S
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.