GMVC9 GCVC9 Installation Instructions
15
3. Cut 2 1/2" from the flange .
4. Remove plastic plug in line with the inducer outlet
5. Install cut end of the flanged section and connect to
inducer with rubber coupling supplied with furnace.
6. Install screws removed in step 1 securing flange to
cabinet.
B
E
SURE
NOT
TO
DAMAGE
INTERNAL
WIRING
OR
OTHER
COMPONENTS
WHEN
REINSTALLING
COUPLING
AND
SCREWS
.
CAUTION
ALTERNATE COMBUSTION AIR PROVISION
(Upflow / Horizontal models only)
When using the alternate venting location, either in a hori-
zontal left side down installation or a vertical installation
using down – venting, an alternate combustion air opening
can be used. A locating dimple is located on the right side of
the furnace cabinet. The locating dimple is 1 7/8" measured
from the front edge of the cabinet in line with the knock out.
To use the alternate combustion air location:
1. Remove screws and combustion air flange from cabinet.
2. Insert cabinet plug in unused combustion air hole.
3. Drill a pilot hole at the cabinet dimple (size dictated by
knockout tool used).
4. Use a knockout tool to create a 3" diameter hole
5. Install combustion air flange and secure with screws
removed in step one.
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2 120 115 110 105 100 95 90 85
3 134 127 120 113 106 99 92 85
2 100 95 90 85 80 75 70 65
3 151 144 137 130 123 116 109 102
2 4540353025201510
3 113 106 99 92 85 78 71 64
2 706560555045N/AN/A
3 8982756861544740
2 N/A N/A N/A N/A N/A N/A N/A N/A
3 120 113 106 99 92 85 78 71
2 N/A N/A N/A N/A N/A N/A N/A N/A
3 151 144 137 130 123 116 109 102
2 120 115 110 105 100 95 N/A N/A
3 185 178 171 164 157 150 143 136
2 8580757065605550
3 168 161 154 147 140 133 126 119
2 40353025201510 5
3 120 113 106 99 92 85 78 71
2 N/A N/A N/A N/A N/A N/A N/A N/A
3 113 106 99 92 85 78 71 64
2 N/A N/A N/A N/A N/A N/A N/A N/A
3 151 144 137 130 123 116 109 102
*MVC96/*CVC96 Direct Vent (2 - Pipe) and Non-Direct Vent (1- Pipe)
(6)
Maximum Allowable Length of Vent/Flue Pipe
& Combustion Air Pipe (ft)
(1) (2)
Number of Elbows
(3) (5)
Pipe Size
(4)
(in.)
MODEL
*MVC960403BN
*CVC960603BN
*CVC960804CN
*CVC961005CN
*CVC961205DN
*MVC960603BN
*MVC960803BN
*MVC960804CN
*MVC961005CN
*MVC961205DN
*CVC960403BN
NON-DIRECT VENT (SINGLE PIPE) PIPING
Non-direct vent installations require only a vent/flue pipe. The
vent pipe can be run horizontally with an exit through the side of
the building or run vertically with an exit through the roof of the
building. The vent can also be run through an existing unused
chimney; however, it must extend a minimum of 12 inches above
the top of the chimney. The space between the vent pipe and the
chimney must be closed with a weather-tight, corrosion-resis-
tant flashing.
Although non-direct vent installations do not require a combus-
tion air intake pipe, a minimum of one 90° elbow should be
attached to the furnace’s combustion air intake if: an upright
installation uses the standard intake location, or a horizontal
installation uses the alternate air intake location. This elbow will
guard against inadvertent blockage of the air intake.
VENT/FLUE PIPE LENGTHS AND DIAMETERS
NOTE: For installations at or above 7,000 feet altitude, use
3” venting. If either a 90 degree or 45 degree elbow is used
for termination, it must be pointed downward.
Refer to the following table for applicable length, elbows, and
pipe diameter for construction of the vent/flue pipe system of a
non-direct vent installation. In addition to the vent/flue pipe, a
single 90° elbow should be secured to the combustion air intake
to prevent inadvertent blockage. The tee used in the vent/flue
termination must be included when determining the number of
elbows in the piping system.
1) Maximum allowable limits listed on individual lengths for
inlet and flue and NOT a combination.
2) Minimum requirement for each vent pipe is five (5) feet
in length and one elbow/tee.
3) Tee used in the vent/flue termination must be included
when determining the number of elbows in the piping sys-
tem
4) 2 1/2” or 3” diameter pipe can be used in place of 2”
diameter pipe.
5) Increased Clearance Configurations using (2) 45 deg. Long
Sweep elbows should be considered equivalent to one 90 deg.
elbow.
6) One 90° elbow should be secured to the combustion air
intake connection.
NOTE: For installations at or above 7,000 feet altitude, use
3” venting.