3
SAFETY CONSIDERATIONS
FURNACE RELIABILITY HAZARD
Improper installation or misapplication of furnace may
require excessive se rvicing or cause premature component
failure.
Application of this furnace should be indoo rs with special
attention given to vent sizing and material combustion air
requirements, gas input rate, air temperature rise, unit
leveling, and unit sizing.
CAUTION
!
FIRE, EXPLOSION, ELECTRICAL SHOCK AND
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal
injury, death, or property damage.
Improper installation, adjustment, alteration, service,
maintenance, or use can cause carbon monoxide poisoning,
explosion, fire, electrical shock, or other conditions which
may cause personal injury or prop erty d amage. Con sult a
qualified installer, service agency, local gas supplier, or your
distributor or branch for information or assistance. The
qualified installer or agency must use only
factory--authorized and listed kits or accessories when
modifying this product.
!
WARNING
Installing and servicing heating equipment can be hazardous due
to gas and electrica l components. Only trained and qualified
personnel should install, repair, or service heating equipment.
Untrained personnel can perform b asic maintenance fun ctions
such as cleaning and replacing air filters. All other operations
must be performed by trained service personnel. When working
on heating equipment, observe precautions in literature, on tags,
and on labels attached to or shipped with unit and other safety
precautions that may apply.
These instructions cover the minimum requirements and conform
to existing national standards and safety codes. In some instances,
these instructions exceed certain local codes and ordinances,
especially those that may not have kept up with changing
residential construction practices. We require these instructions as
aminimumforasafeinstallation.
Wear safety glasses and work gloves. Have a fire extinguisher
available during start--up and adjustment procedures and service
calls.
Recognize safety information. This is the safety --alert symbol
.Whenyouseethissymbolonthefurnaceandin
instructions or manuals, be alert to the potential for personal
injury.
Understand the signal words DANGER, WARNING, and
CAUTION. These wo rds are used with the safety--alert symbol.
DANGER identifies the most serious hazards which will result in
severe personal injury or death. WARNING signifies a hazard
which could result in personal injury or death. CAUTION is used
to identify unsafe practices which may result in minor personal
injury or product and property damage. NOTE is used to
highlight suggestions which will result in enhanced installation,
reliability, or operation.
CUT HAZARD
Failure to follow this caution may result in personal injury.
Sheet metal parts may have sharp edges or burrs. Use care
and wear appropriate protective clothing and gloves when
handling parts.
CAUTION
!
The 355CAV Condensing Gas-- Fired Furnaces are CSA
(formerly AGA and CGA) design--certified for natural and
propane gases (see furnace rating plate) and for installation in
alcoves, attics, basements, closets, utility rooms, crawlspaces, and
garages. The furnace is factory --shipped for use with natural gas.
ACSAlistedgasconversionkitisrequiredtoconvertfurnacefor
use with propane gas.
See Fig. 3 for required clearances to combustibles.
Maintain a 1--in. (25.4 mm) clearance from comb ustible materials
to supply air ductwork for a distance of 36 inches horizontally
from the furnace. See NFPA 90B or local code for further
requirements.
These furnaces SHALL NOT be installed directly on carpeting,
tile, or any other combustible material other than wood flooring.
These furnaces are suitable for installation in a structure built o n
site or a manufactured building completed at final site. The
design of this furnace line is NOT CSA design--certified for
installation in recreation vehicles, manufactured (mobile) homes
or outdoors.
This furnace is designed for continuous return-- air minimum
temperature of 60_Fdborintermittentoperationdownto55_F
db such as when used with a night setback thermostat. Return--air
temperature must not exceed 80_Fdb.Failuretofollowthese
return air limits may affect reliability of heat exchangers, motors
and controls. (See Fig. 4.)
These furnaces are shipped with the drain and pressure tubes
connected for UPFLOW applications. Minor modifications are
required when used in DOWNFLOW, HORIZONTAL RIGHT,
or HORIZONTAL LEFT (supply--air discharge direction)
applications as shown in Fig. 1. See details in Applications
section.
Install this furnace only in a location and position as specified in
LOCATION and INSTALLATION sections of these instructions.
Combustion products must be discharged outdoors. Connect this
furnace to an approved vent system only, as specified in the
Combustion Air and Vent piping sections of these instructions.
Never test for gas leaks with an open flame. Use a commercially
available soap solution made specifically for detection of leaks to
check all connections as specified in the GAS PIPING section of
these instructions.
Always install the furnace to operate within the furnace’s
intended rise range with a duct system which has an external
static pressure within the allowable range as specified in the SET
TEMPERATURE RISE section of these instructions.
When a furnace is installed so that supply ducts carry air
circulated by the furnace to areas outside the space containing the
furnace, the return air shall also be handled by ducts sealed to the
furnace casing and terminating outside the space containing the
furnace.
355CAV
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