035-19600-001 Rev. B (0204)
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
without excessive corrosion.
2.
Examine the vent pipe making sure it is in firmly 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.
BURNER BOX
GAS VALVE
VENT PIPE
INDUCER
ASSEMBLY
CONTROL
BOARD
PRESSURE
SWITCH
BLOWER
INDUCER MOTOR
TRANSFORMER
DOOR SAFETY
SWITCH
HOT SURFACE
IGNITER
BURNER BOX
COMBUSTION
AIR INLET
FLAME
LIMIT SWITCH
SENSOR
FIGURE 2:
Burner Flame Drawing
COMBUSTION AIR INTAKE
BURNER FLAME
GAS MANIFOLD
INNER FLAME
CONES
MAIN GAS BURNER
COMBUSTION
AIR DIFFUSER
FIGURE 3:
Furnace Examination Checkpoints
REMOVE THIS
EXAMINE
FURNACE
CASING
EXAMINE THE INTERNAL AND
EXAMINE RETURN AIR
3
2
6
4
DUCT CONNECTION
1
EXTERNAL VENT PIPES
2
PANEL TO
EXAMINE THE
BURNER FLAMES
EXAMINE
FURNACE
CASING
4
REMOVE THIS
PANEL TO
EXAMINE VENT
PIPE
PLACE A FIELD
INSTALLED ACCESS
PANEL
LOCATED IN THE
DOWNFLOW PLENUM
TO EXAMINE THE
HEAT EXCHANGER
