Bryant 349HAZ Service And Maintenance Procedures Manual
Bryant 349HAZ Service And Maintenance Procedures Manual

Bryant 349HAZ Service And Maintenance Procedures Manual

Gas-fired, induced-combustion horizontal furnaces
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NOTE: Read the entire instruction manual before starting the instal-
lation.
SAFETY CONSIDERATIONS
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 the literature, tags, and labels
attached to or shipped with the unit and other safety precautions that
may apply.
Follow all safety codes, including NFPA 54/ANSI Z223.1-1988,
National Fuel Gas Code. Wear safety glasses and work gloves. Have
fire extinguisher available during start-up and adjustment procedures
and service call.
Recognize safety information. This is the safety-alert symbol
When you see this symbol on the unit and in instructions or manuals,
be alert to the potential for personal injury.
Understand the signal word—DANGER, WARNING, or 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 hazards that could result in
personal injury or death. CAUTION is used to identify unsafe
practices, which would result in minor personal injury or product and
property damage.
service and
maintenance procedures
GAS-FIRED, INDUCED-COMBUSTION
HORIZONTAL FURNACES
Fig. 1—Model 349HAZ Horizontal Furnace
—1—
Cancels: SP04-10
WARNING: Never store anything on, near, or in contact
with, the furnace, such as:
1. Spray or aerosol cans, rags, brooms, dust mops, vacuum
cleaners, or other cleaning tools.
2. Soap powders, bleaches, waxes or other cleaning
compounds, plastic or plastic containers, gasoline, kero-
sene, cigarette lighter fluid, dry cleaning fluids, or other
volatile fluids.
3. Paint thinners and other painting compounds, paper bags
or other paper products.
Failure to follow this warning can cause corrosion of the heat
exchanger, fire, personal injury, or death.
WARNING: The ability to properly perform maintenance
on this equipment requires certain expertise, mechanical
skills, tools, and equipment. If you do not possess these, do
not attempt to perform any maintenance on this equipment
other than those procedures recommended in the User's
.
Manual. FAILURE TO FOLLOW THIS WARNING
COULD RESULT IN POSSIBLE DAMAGE TO THIS
EQUIPMENT, SERIOUS PERSONAL INJURY, OR
DEATH.
CARE AND MAINTENANCE
For continuing high performance and to minimize possible equipment
failure, it is essential that maintenance be performed annually on this
equipment. Consult your local dealer for maintenance and the
availability of a maintenance contract.
349HAZ
Series B
SP04-15
8-15-92
A91314

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Summary of Contents for Bryant 349HAZ

  • Page 1 Consult your local dealer for maintenance and the availability of a maintenance contract. A91314 Fig. 1—Model 349HAZ Horizontal Furnace —1—...
  • Page 2: Air Filter Cleaning And Replacement

    2. Remove blower access door located at inlet (return air) end of WARNING: Turn OFF the gas and electrical supplies to the furnace; 4 screws must be removed. unit before performing any maintenance or service. Follow 3. Bend wire filter retainer until it clears furnace flange and swing the operating instructions on the label attached to the it toward the blower.
  • Page 3: Cleaning Heat Exchangers And Burners

    d. After oiling motor, wipe excess oil from motor housing. e. Replace dust caps or plugs on oil ports. 9. Remove blower wheel from housing. a. Mark blower wheel orientation and cutoff plate location to insure proper reassembly. b. Remove screws securing cutoff plate and remove cutoff plate from housing.
  • Page 4 Refer to Fig. 6 for field application wiring and Fig. 7 for unit wiring. With power disconnected to the unit, check all electrical connections for tightness. Tighten all screws on electrical connections. If any smokey or burned connections are found, disassemble the connection, clean all parts, strip wire, and reassemble properly and securely.
  • Page 5 —5—...
  • Page 6: Trouble Analysis Chart

    TROUBLE ANALYSIS CHART SYMPTOM PROBABLE CAUSE REMEDY Check 115-v electrical supply to furnace. Check spark gap. Check draft inducer motor, repair as necessary. Check pressure switch; contacts must be closed (vent piping must be free from obstructions). Also, check for kinks or obstructions in pressure tubing. Check for accumulation of moisture or dirt on electrode ceramic;...

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