Installation Instructions Comfort Bridge Models

7
POSITION* SIDES REAR FRONT BOTTOM FLUE TOP
Upflow 0" 0" 3" C 0" 1"
Horizontal 6" 0" 3" C 0" 6"
C = If placed on combustible floor, floor MUST be wood only.
*M VC96 MINIM UM CLEARANCES TO COM BUSTIBLE MATERIALS
(INCHES)
POSITION* SIDES REAR FRONT BOTTOM FLUE TOP
Counterflow 0" 0" 3" NC 0" 1"
Horizontal 6" 0" 3" C 0" 6"
C = If placed on combustible floor, floor MUST be wood only.
NC = For installation on non-combustible floors only. A combustible subbase
must be used for installations on combustible flooring.
*CVC96 MINIM UM CLEARANCES TO COM BUSTIBLE MATERIALS
(INCHES)
TOP
BOTTOM
TOP
BOTTOM
Counterflow
fIgure 1
clearances anD accessIBIlItY
note: for serVIcIng or cleanIng, a 24” front
clearance Is requIreD. unIt connectIons
(electrIcal, flue anD DraIn) MaY necessItate
greater clearances tHan tHe MInIMuM clearances
lIsteD aBoVe.
note: In all cases, accessIBIlItY clearance Must
take PreceDence oVer clearances froM tHe
enclosure wHere accessIBIlItY clearances are
greater.
note: InstallatIons Must aDHere to tHe clearances
to coMBustIBle MaterIals to wHIcH tHIs furnace
Has Been DesIgn certIfIeD. tHe MInIMuM clearance
InforMatIon for tHIs furnace Is ProVIDeD on tHe
unIt’s clearance laBel. tHese clearances Must Be
PerManentlY MaIntaIneD. clearances Must also
accoMMoDate an InstallatIon’s gas, electrIcal,
anD DraIn traP anD DraIn lIne connectIons. If
tHe alternate coMBustIon aIr Intake or Vent/flue
connectIons are useD aDDItIonal clearance Must
Be ProVIDeD to accoMMoDate tHese connectIons.
refer to Vent/flue PIPe and combustIon aIr PIPe for
DetaIls.
• Isolate a non-direct vent furnace if it is installed near
an area frequently contaminated by any of the above
substances. This protects the non-direct vent furnace
from airborne contaminants. To ensure that the
enclosed non-direct vent furnace has an adequate
supply of combustion air, vent from a nearby
uncontaminated room or from outdoors. Refer to
the Combustion and Ventilation Air Requirements for
details.
• If the furnace is used in connection with a cooling coil
unit, install the furnace upstream or in parallel with the
cooling coil unit. Premature heat exchanger failure
will result if the cooling unit is placed ahead of the
furnace.
• For vertical (upow or downow) applications, the
minimum cooling coil width shall not be less than
furnace width minus 1”. Additionally, a coil installed
above an upow furnace or under a counterow
furnace may be the same width as the furnace or may
be one size larger than the furnace.
Example: a “C” width coil may be installed with
a “B” width furnace.
For upow applications, the front of the coil and furnace
must face the same direction.
• If the furnace is installed in a residential garage,
position the furnace so that the burners and ignition
source are located not less than 18 inches (457 mm)
above the oor. Protect the furnace from physical
damage by vehicles.
• If the furnace is installed horizontally, ensure the
access doors are not on the “up/top” or “down/bottom”
side of the furnace.
• Do not connect this furnace to a chimney ue that
serves a separate appliance designed to burn solid
fuel.
• On Counterow Installations, the air conditioning coil
must be downstream on the supply (positive) side of
the furnace heat exchanger.
• Counterow Installation over a noncombustible oor.
Before setting the furnace over the plenum opening,
ensure the surface around the opening is smooth
and level. A tight seal should be made between the
furnace base and oor by using a silicone rubber
caulking compound or cement grout.
• Counterow Installation over a combustible oor.
If installation over a combustible oor becomes
necessary, use an accessory subbase (see
Specication Sheet applicable for your model for
details.) A special accessory subbase must be
used for upright counterow unit installations over
any combustible material including wood. Refer to
subbase instructions for installation details. Follow the
instructions with the subbase for proper installation.
Do not install the furnace directly on carpeting, tile, or
other combustible material other than wood ooring.
note: a suBBase wIll not Be requIreD If an aIr
conDItIonIng coIl Is InstalleD Between tHe suPPlY
aIr oPenIng on tHe furnace anD tHe floor.)