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820SB/821SB: Installation, Start–Up, Operating and Service and Maintenance Instructions
SAFETY CONSIDERATIONS
WARNING
!
FIRE, INJURY, OR DEATH HAZARD
Failure to follow this warning could result in property damage, personal
injury, or death.
This furnace was manufactured to operate with natural gas. When fuel
supply is Liquid Propane (LP), this furnace must be converted with a
factory approved LP conversion kit. See furnace rating plate for
approved conversion kit.
WARNING
!
FIRE, EXPLOSION, ELECTRICAL SHOCK, AND
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in dangerous operation,
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 property
damage. Consult a qualified service agency, local gas supplier, or your
distributor or branch for information or assistance. The qualified
service agency must use only factory-authorized accessories and
replacement parts when installing and servicing this product.
CAUTION
!
FURNACE RELIABILITY HAZARD
Failure to follow this caution may result in unit component damage.
Application of this furnace should be indoors with special attention
given to vent sizing and material, gas input rate, air temperature rise,
unit leveling, and unit sizing.
WARNING
!
FIRE, EXPLOSION, ELECTRICAL SHOCK, AND
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in dangerous operation,
personal injury, death, or property damage.
Furnaces shall NOT be twinned (i.e. tandem or staged operation) unless
approved in factory technical specifications literature for the furnace. A
factory authorized, field-supplied Twinning Kit MUST be used.
Consult furnace pre-sale literature for specific models approved for
twinning and the correct twinning kit. Twinned furnaces must be
installed on both a common supply AND a common return duct system
as shown in the Twinning Kit Installation Instructions. Only two
furnaces can be twinned on a common supply and return duct system
using a factory authorized twinning kit.
Installing and servicing heating equipment can be hazardous due to gas
and electrical components. Only trained and qualified personnel should
install, repair, or service heating equipment. Untrained personnel can
perform basic maintenance functions 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 furnace and
other safety precautions that may apply.
These instructions cover minimum requirements and conform to existing
national standards and safety codes. In some instances, these instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
exceed certain local codes and ordinances, especially those that may not
have kept up with changing residential construction practices. We
require these instructions as a minimum for a safe installation.
!
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, safety glasses and gloves when
handling parts, and servicing furnaces.
!
FIRE, INJURY, OR DEATH HAZARD
Failure to follow this warning could result in property damage, personal
injury, or death.
Do not bypass any of the safety controls in the furnace, including but
not limited to the main limit switch, rollout or burner thermal switch,
and pressure switch/pressure transducer.
!
PERSONAL INJURY AND PROPERTY DAMAGE
HAZARD
Failure to follow this warning could result in property damage, personal
injury, or death.
For continued performance, reliability, and safety, the only approved
accessories and replacement parts are those specified by the equipment
manufacturer. The use of non-manufacturer approved parts and
accessories could invalidate the equipment limited warranty and result
in fire risk, equipment malfunction, and failure. Please review
manufacturer's instructions and replacement part catalogs available
from your equipment supplier
Wear safety glasses, protective clothing and work gloves. Have fire
extinguisher available during start-up and adjustment procedures and
service calls.
This is the safety-alert symbol
furnace and in instructions or manuals, be alert to the potential for
personal injury.
Understand the signal words DANGER, WARNING, and CAUTION.
These words 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 hazards 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.
The following additional safety considerations should be followed for
gas furnaces:
1. Use only with type of gas approved for this furnace. Refer to the
furnace rating plate.
2. Install this furnace only in a location and position as specified in the
"Location" section of these instructions.
3. Provide adequate combustion and ventilation air to the furnace
space as specified in "Air for Combustion and Ventilation" section.
4. Combustion products must be discharged outdoors. Connect this
furnace to an approved vent system only, as specified in the
"Venting" section of these instructions.
3
CAUTION
WARNING
WARNING
. When you see this symbol on the
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