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172988-YUM-A-0106
2 Unitary Products Group
7. NEVER . . .Store flammable materials of any kind near your fur-
nace. Gasoline, solvents, and other volatile liquids should be
stored only in approved containers outside your home. These
materials vaporize easily and are extremely dangerous.
8. NEVER . . .Store cleaning materials near your furnace. Materials
such as bleaches, detergents, powdered cleansers, etc., can
cause corrosion of the heat exchangers.
9. NEVER . . . Use the area around your furnace as a storage area
for items which could block the normal flow of air. This flow of air is
required for ventilation of the various furnace components.
INSTRUCTIONS FOR EXAMINING THE FURNACE
INSTALLATION
It is the owner’s responsibility to ensure that an annual inspection of the
entire heating portion of the unit is made by a qualified service agency.
1. Examine the heat exchanger, through a field installed access
panel located on the supply air plenum. Visually examine the exte-
rior sections of the vent/combustion air piping and the vent con-
nectors to be sure that they are physically sound without holes or
excessive corrosion.
2. Examine the vent pipe making sure it is firmly in place, that it
slopes slightly upward and is physically sound without holes and
all of the connections are secure.
3. Examine the return-air duct connections to make sure they are
physically sound, sealed to the furnace casing, and the ducts ter-
minate outside the space containing the furnace.
4. Examine the furnace casing making sure the physical support is
sound without sagging, cracks or gaps. Examine the furnace base
making sure it is physically sound without cracks, gaps or sagging
and has a good seal.
5. Examine the furnace casing for obvious signs of deterioration.
6. Examine the burner flames to make sure they are in good adjust-
ment. Refer to the pictorial sketch shown in Figure 2 as a compari-
son to the actual flame.
7. Examine the furnace as outlined above in steps 1 - 6 before each
heating season. Use Figure 3 for visual reference.
FIGURE 1: Component Locations
FIRE OR EXPLOSION HAZARD
This furnace is designed and approved for use with Nat-
ural Gas and (LP) Propane Gas ONLY. DO NOT BURN
ANY LIQUID FUEL OR SOLID FUEL IN THIS FURNACE.
Burning any unapproved fuel will result in damage to the
furnace heat exchanger, which could result in Fire, Per-
sonal Injury, and/or Property Damage.
CONTROL
BOARD
BLOWER
ACCESS
PANEL
GAS
VALVE
LIMIT
SWITCH
BURNER BOX
VENT PIPE
CONDENSATE
HOSE
RAIN
GUTTER
INDUCER
HOUSING
CONDENSATE
DRAIN HOSE
CONDENSATE
TRAP
GAS
REFERENCE
HOSE
PRESSURE
SWITCHES
INDUCER
MOTOR
PRESSURE
SWITCH
TUBING
TRANSFORMER
FIGURE 2: Burner Flame Drawing
MANIFOLD
MAIN BURNER
BURNER
FLAME
INNER
FLAME
CONES
COMBUSTION
AIR
TRANSITION
(not shown)
FIGURE 3: Furnace Examination Checkpoints
BURNER DOOR
BLOWER DOOR
3
EXAMINE RETURNAIR
DUCT CONNECTION
4
EXAMINE
FURNACE
CASING
2
REMOVE
THIS PANEL
TO EXAMINE
VENT PIPE
REMOVE THIS
PANELTO
EXAMINE THE
BURNER FLAMES
6
1
PLACEA FIELD
INSTALLEDACCESS
PANELLOCATED IN
THE DOWNFLOW
PLENUM TO EXAMINE
THE HEAT EXCHANGER
4
EXAMINE
FURNACE
CASING
5
EXAMINE CASING
FOR DETERIORATION
5
EXAMINE
CASING FOR
DETERIORATION