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[]NIT
DAMAGE
HAZARD
This
gas
furnace
may
be
used
for
construction
heat
provided
that:
-The
furnace
is permanently
installed
with
all electrical
wiring,
piping,
air filters,
venting
and
ducting
installed
according
to these installation
instructions.
A return air duct
is provided,
sealed
to the furnace
casing,
and ternfinated
outside
the space
containing
the furnace.
This
prevents
a
negative
pressure
condition
as created
by the circulating
air
blower,
causing
a flame rollout
and/or drawing
combustion
products
into the structure.
-The
furnace
is controlled
by a thermostat.
It may not be
"hot wired"
to provide
heat continuously
to the structure
without
thermostatic
control.
-Clean
outside
air is provided
for combustion.
This
is to
nfininfize
the
corrosive
effects
of adhesives,
sealers
and
other
construction
materials.
It
also
prevents
the
entrainment
of drywall
dust into combustion
air, which can
cause fouling
and plugging
of furnace
components.
-The
temperature
of the
return
air
to
the
furnace
is
maintained
between
55°F
(13°C)
and 80°F
(27°C),
with
no evening
setback
or shutdown.
The use of the furnace
while
the structure
is under
construction
is deemed
to be
internfittent
operation
per our installation
instructions.
-The
air temperature
rise is within
the rated rise range on
the furnace
rating plate,
and the firing rate has been
set to
the nameplate
value.
-The
filters
used
to clean
the
circulating
air during
the
construction
process
nmst be either changed
or thoroughly
cleaned
prior to occupancy.
-The furnace,
ductwork
and filters are cleaned
as necessary
to remove
drywall
dust
and construction
debris
from
all
HVAC system
components
after construction
is completed.
-After
construction
is complete,
verify
furnace
operating
conditions
including
ignition,
input
rate, temperature
rise
and venting,
according
to the manufacturer's
instructions.
FIRE
OR DEATH
HAZARD
Failure
to
follow
this
warning
could
result
in property
damage,
personal
injury,
or death.
Do
not
install
furnace
on its back.
(See
Fig.
16.) Safety
control
operation
will be adversely
affected.
Never
connect
return-air
ducts to back of furnace.
The furnace
and its return
air system
shall
be designed
and
installed
so that negative
pressure
created
by the air circulating
fan cannot
affect another
appliance's
combustion
air supply or act
to nfix products
of combustion
with circulating
air, and that the
air circulating
fan of the furnace,
if installed
in an enclosure
communicating
with
another
fuel-burning
appliance
not of the
direct-vent
type, shall be operable
only when
any door or panel
covering
an opening
in the furnace
fan compartment
or in a return
air plenum
on ducts is in the closed position.
UNIT
DAMAGE
HAZARD
Failure to follow this caution may result in nfinor property
or unit damage.
If these furnaces are installed in an unconditioned
space
where ambient temperatures may be 32°F (0°C) or lower,
freeze protection measures must be taken. See Condensate
Drain Protection section and Fig. 17.
_3/ff/ 2MFfONCg4NFIMgM ZI#STALLED
_
PROTECTION REQUIRED
Fig. 17 - Freeze
Protection
/
A07911
Furnace Location Relative to Cooling Equipment
The cooling coil must be installed parallel with or on downstream
side of furnace to avoid condensation in heat exchanger. When
installed parallel with a furnace, dampers or other means used to
control flow of air shall be adequate to prevent chilled air from
entering furnace. If dampers are manually operated, they nmst be
equipped with a means to prevent operation of either unit unless
damper is in full-heat or full-cool position.
Hazardous
Locations
FIRE,
EXPLOSION,
INJURY
OR DEATH
HAZARD
Improper
location
or inadequate
protection
could
result
in
fire or explosion,
When furnace
is installed
in a residential
garage,
it nmst be
installed
so that burners
and ignition
sources
are located
a
nfininmm
of 18 in. (457 ram) above floor. The furnace nmst
be
located
or protected
to
avoid
physical
damage
by
vehicles.
When
furnace
is installed
in
a public
garage,
airplane
hangar,
or other
building
having
a hazardous
atmosphere,
unit
must
be
installed
in
accordance
with
requirements
of National
Fire Protection
Association,
Inc.
(See Fig. 5.)
g
17
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