Grand Aire WFHR Owner's Manual
Owner’s Manual
NOTE TO INSTALLER:
THIS MANUAL MUST BE LEFT WITH THE
EQUIPMENT USER.
USER: PLEASE READ ALL INSTRUCTIONS
IN THE MANUAL AND RETAIN ALL
MANUALS FOR FUTURE REFERENCE.
!
WARNING
FIRE OR EXPLOSION HAZARD
Failure to follow warnings could result in injury, death,
or property damage.
Do not store or use gasoline or other flammable vapors
and liquids in the vicinity of this or any other appliance.
WHAT TO DO IF YOU SMELL GAS
−Do not try to light any appliance.
−Do not touch any electrical switch; do not use any
phone in your building.
−Leave the building immediately.
−Immediately call your gas supplier from a neighbor’s
phone. Follow the gas supplier’s instructions.
−If you cannot reach your gas supplier, call the fire
department.
Installation and service must be performed by a
qualified installer, service agency or the gas supplier.
CONDENSING GAS FURNACE
WFHR
CERTIFIED
!
WARNING
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal
injury and/or death.
Carbon Monoxide is invisible, odorless, and toxic!
Payne Heating and Cooling Systems recommends a
carbon monoxide alarm in your home, even if you do
not own a gas appliance. Locate the carbon monoxide
alarm in the living area of your home and away from
gas appliances and doorways to attached garages.
Follow the alarm manufacturer’s instruction included
with the alarm.
Specifications subject to change without notice.
A08174
!
WARNING
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal injury,
death, or property damage.
Do not use this furnace if any part has been under water. A
flood−damaged furnace is extremely dangerous. Attempts to
use the furnace can result in fire or explosion. A qualified
service agency should be contacted to inspect the furnace and
to replace all gas controls, control system parts, electrical parts
that have been wet or the furnace if deemed necessary.
440 02 7000 02 Sept. 2009
TABLE OF CONTENTS
WELCOME TO A NEW GENERATION OF COMFORT 2. . . .
FURNACE COMPONENTS 2. . . . . . . . . . . . . . . . . . . . . . . . . . .
GENERAL FURNACE SAFETY 2. . . . . . . . . . . . . . . . . . . . . . .
IMPORTANT FACTS 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SAFETY CONSIDERATIONS 3. . . . . . . . . . . . . . . . . . . . . . . . .
BEFORE STARTING YOUR FURNACE 4. . . . . . . . . . . . . . . . .
STARTING YOUR FURNACE 5. . . . . . . . . . . . . . . . . . . . . . . . .
Steps for Starting Your Furnace 5. . . . . . . . . . . . . . . . . . . . . . . .
SHUTTING DOWN YOUR FURNACE 6. . . . . . . . . . . . . . . . . .
PERFORMING ROUTINE MAINTENANCE 7. . . . . . . . . . . . .
Filtering Out Trouble 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COMBUSTION AREA AND VENT SYSTEM 9. . . . . . . . . . . .
INSTALLATION DATA 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BEFORE YOU REQUEST A SERVICE CALL 11. . . . . . . . . . .
REGULAR DEALER MAINTENANCE 11. . . . . . . . . . . . . . . .
WELCOME TO TODAY’S GENERATION
OF COMFORT
Congratulations! In light of rising energy costs, the WFHR
Multipoise, Fixed−Capacity, Direct/Non−Direct Vent, Condensing
Gas Furnaces are among the soundest investments today’s
homeowner can make.
Your new furnace is truly a triumph of technology in home
heating. A revolutionary design employs two (2) heat exchangers
to “squeeze” out the maximum amount of heat from the fuel
consumed. In fact, your new furnace is so efficient, over 90%* of
the heat generated during combustion is captured and delivered
inside your home. That is more than a 30%* increase in heating
efficiency over conventional furnaces.
This furnace is among the most energy−efficient furnaces you can
buy today. The WFHR is also among the safest and most
dependable. We are proud of the technological advances
incorporated into the design of this furnace. With only minimal
care, your new furnace will deliver many years of money−saving
home comfort and enjoyment. Spend just a few minutes with this
manual to learn the operation of your new furnace and the small
amount of maintenance it takes to help keep it operating at peak
efficiency year after year.
* The output capacity and any representations of efficiency for this furnace are based on standard U.S.
Department of Energy test procedures.
GENERAL FURNACE SAFETY
1. Combustible Materials, Gasoline Warning. . . . . . . . . . . . . 1
2. Furnace Must be Kept Free and Clear of Insulating Material
Warning. . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3. Furnace Needs Air for Combustion and Ventilation
Warning . . . . . . . . . . . . . . . . . . . . . .. .. . . . . . . . . . . . . . . . 4
4. Starting (Lighting) and Shutting Down the
Furnace Warning .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5, 6
5. Proper Furnace Shutdown Procedures . . . . . . . . . . . . . . . . 6
6. Flood Damage Warning . . . . . . . . . . . . . . . . . . . . . . . . . . 1
7. Fire or Explosion Hazard Warning. . . . . . . . . . . . . . . . . . . 1
8. Carbon Monoxide Warning . . . . . . . . . . . . . . . . . . . . . . . . 1
9. Service and Maintenance Electrical Hazard Warning . . . . . 7
10. Sharp Edges Caution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
11. No Filter Caution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
12. Dirt, Rust, or Accumulation Caution . . . . . . . . . . . . . . . . . 9
FURNACE COMPONENTS
(Furnace shown in upflow position; may be used in downflow or
horizontal orientation or applications.)
Figure 1 Furnace shown in upflow position
Air filter and retainer. (Location in furnace may vary.)
Rollout switch (manual reset) to prevent
over temperature.
1 Burner sight glass for viewing burner flame.
2 Burner assembly (inside), operates with en-
ergy−saving, inshot burners and hot surface igniter for safe, dependable heating.
3 Combustion−air intake connection (right or left
side).
4 Redundant gas valve. Safe and efficient. Features
1 gas control with 2 internal shutoff valves.
5 Junction box for 115−v electrical power supply.
6 Vent outlet, uses PVC pipe to carry flue gas from
the furnace’s combustion system (right or left
side).
7 Secondary condensing heat exchanger (inside).
Wrings out more heat through condensation. Con-
structed with polypropylene−laminated steel to
ensure durability.
8 Pressure switch ensures adequate flow of flue gas
through furnace and out vent system.
9 Inducer motor. Pulls hot flue gases through the
heat exchangers, maintaining negative pressure for
added safety.
10 Condensate drain connection, collects moisture
condensed from burned gases for disposal into
home drain system. (location in furnace varies)
11 Heavy−duty blower, circulates air across the heat
exchangers to transfer heat into the home.
440 02 7000 02
Specifications subject to change without notice.
2
12 Air filter and retainer. (Location in furnace may
vary.)
13 Rollout switch (manual reset ) to prevent overtem-
perature.
14 Primary serpentine heat exchanger (inside),
stretches fuel dollars with the S−shaped heat−flow
design. Solid construction of corrosion−resistant
aluminized steel means reliability.
15 3−amp fuse provides electrical and com-
ponent protection.
16 Status code light emitting diode (LED) on furnace
control board. Status code light is for diagnosing
furnace operation and service requirements.
17 Furnace control board.
18 Blower access panel safety interlock switch.
19 Transformer (24v) behind furnace control board
provides low−voltage power to furnace control
board and thermostat.
IMPORTANT FACTS (DO’S AND DON’TS)
S DO: READ AND UNDERSTAND THIS MANUAL.
S DO: Have your furnace and vent system inspected annually by a
qualified service technician.
S DO: Inspect your filter monthly and clean or replace when
needed.
S DO: Provide adequate airflow to the furnace for efficient
combustion and safe ventilation.
S DO: Keep your furnace free and clear of insulating material.
Some materials may be combustible. Examine the furnace area
when the furnace is installed or when insulation is added.
S DO NOT: Enclose your furnace in an airtight room or seal it
behind solid doors.
S DO NOT: Keep combustible materials, gasoline, and other
flammable liquids or vapors around your furnace.
S DO NOT: Cover your furnace in any manner.
S DO NOT: Store anything (including trash or debris) near your
furnace.
S DO NOT: In any way block or restrict airflow around your
furnace.
S DO NOT: In any way block or restrict airflow to your supply air
and return air grills.
S DO NOT: Use your furnace room as a broom closet or a place to
store any kind of chemical or cleaner.
S DO NOT: Contaminate the air used for combustion of your
furnace with any kind of chemical or fumes. This could also
cause heat exchangers, metal vent systems or components to
deteriorate.
NOTE: These chemicals or fumes are present in many products
around the home, such as: water softener salts, any type of
household cleaning product, any type of laundry product,
adhesives, paints, varnishes, paint strippers, waxes and plastics, etc.
During remodeling be sure the combustion air is fresh and
uncontaminated. If these compounds are burned in your furnace,
the heat exchangers and metal vent system may deteriorate.
NOTE: The qualified installer or agency must use only
factory−authorized replacement parts, kits, and accessories when
modifying this product.
This furnace contains safety devices which must be manually reset.
If the furnace is left unattended for an extended period of time,
have it checked periodically for proper operation. This precaution
3
Specifications subject to change without notice.
will prevent problems associated with no heat, such as frozen water
pipes, etc. See “Before You Request a Service Call” section in this
manual.
!
WARNING
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in injury, death, or
property damage.
Do not keep combustible materials, gasoline, and other
flammable liquids or vapors around your furnace.
!
WARNING
FIRE OR EXPLOSION HAZARD
Failure to follow warnings could result in personal injury,
death, or property damage.
Keep insulation clear of furnace and maintain clearances
shown on unit clearance label.
SAFETY CONSIDERATIONS
Installing and servicing of 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 per-
formed by trained service personnel. Observe safety precautions in
this manual, on tags, and on labels attached to the furnace and other
safety precautions that may apply.
Recognize safety information. This is the safety−alert symbol .
When you see this symbol on the furnace and in instructions or
manuals, be alert to the potential for personal injury.
Understand the signal words DANGER, WARNING, CAUTION,
and NOTE. DANGER, WARNING, and CAUTION 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 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.
To minimize the possibility of serious personal injury, fire, damage to
your furnace, or improper operation, carefully follow these safety
rules which apply to both direct−vent and non−direct vent applica-
tions:
Your new gas furnace may have been installed in 1 of 2 ways, as a direct−vent (2−pipe−Figure 2) application or as a non−direct vent
(1−pipe−Figure 3) application.
In a direct−vent (2−pipe) application, your furnace uses air from outside the home for combustion and vents flue gas to the outdoors. This
type of application will have 2 pipes running from the furnace to the
outdoors. (See Fig. 2.) In this application, the vent and air−intake
pipes must terminate outside the structure and must not be obstructed
in any way. Do not block or obstruct air openings on furnace or spaces
around furnace.
In a non−direct vent (1−pipe) application, your furnace uses air from
adjacent to the furnace for combustion and vents flue gas to the out-
440 02 7000 02
doors. This type of application will have only 1 pipe running from the
furnace to the outdoors. (See Fig. 3.) The other pipe will terminate in
the same space as the furnace and is the source of combustion air for
your furnace. Therefore, the furnace must not be enclosed in an airtight room or be sealed behind solid doors. It must have adequate airflow for efficient combustion and safe ventilation. Do not obstruct the
combustion−air pipe in any way. The vent pipe must terminate outside the structure and must not be obstructed in any way. Do not block
or obstruct air openings or space around furnace.
Figure 2 Exterior Vent Pipes
Figure 3 Interior Combustion−air pipe
Keep the area around your furnace clear and free of com-
bustible materials, gasoline, and other flammable liquids and va-
pors (Figure 4).
Figure 4 NO combustible materials near furnace
S Do not cover the furnace, store trash or debris near it, or in any
way block the flow of fresh air to the unit.
In addition to the safety rules above, make sure that the following
combustion−air requirements are met for non−direct vent applications:
S Combustion air must be clean and uncontaminated with chlorine
or fluorine. These compounds are present in many products
around the home, such as: water softener salts, laundry bleaches,
detergents, adhesives, paints, varnishes, paint strippers, waxes,
and plastics.
S Make sure the combustion air for your furnace does not contain
any of these compounds. During remodeling be sure the
combustion air is fresh and uncontaminated. If these compounds
are burned in your furnace, the heat exchangers may deteriorate.
S A furnace installed in an attic or other insulated space must be
kept free and clear of insulating material. Examine the furnace
area when the furnace is installed or when insulation is added.
Some insulation materials may be combustible.
S Should the gas supply fail to shut off or if overheating occurs,
shut off the gas valve to the furnace before shutting off electrical
supply.
This furnace contains SAFETY DEVICES which must be
MANUALLY RESET. If the furnace is left unattended for an extended period of time, have it checked periodically for proper operation.
This precaution will prevent problems associated with no heat, such
as frozen water pipes, etc. See “Before You Request a Service Call”
section in this manual.
BEFORE STARTING YOUR FURNACE
Examine the furnace installation to determine that:
1. All flue gas carrying areas external to the furnace (i.e.
chimney, vent connector) are clear and free of obstructions.
2. The vent connector is in place, slopes upward and is
physically sound without holes or excessive corrosion.
3. The return−air duct connection(s) is physically sound, is
sealed to the furnace casing, and terminates outside the
space containing the furnace.
4. The physical support of the furnace is sound without
sagging cracks, gaps, etc. around the base.
5. There are no obvious signs of deterioration of the furnace.
440 02 7000 02
Specifications subject to change without notice.
4
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