Nordyne Furnace Residential Gas Furnaces User Manual

User's Information Manual  
Residential Gas Furnaces  
FOR YOUR SAFETY  
!
WARNING:  
FIRE OR EXPLOSION HAZARD  
Failure to follow safety precautions exactly could  
result in serious 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.  
• 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.  
• Extinguish any open flame.  
— Installation and service must be  
performed by a qualified installer,  
service agency, or the gas supplier.  
!
AVERTISSEMENT:  
RISQUE D’INCENDIE OU  
D’EXPLOSION  
Le non-respect des consignes de sécurité pourrait  
entraîner des blessures graves, la mort ou des  
dommages matériels.  
IMPORTANT  
— Ne pas entreposer ni utiliser de  
l’essence ni d’autres vapeurs ou  
liquidesinflammablesdanslevoisinage  
decetappareil,nidetoutautreappareil.  
Read this owner information thoroughly  
before attempting to operate or maintain this  
furnace to become familiar with the  
capabilities and use of your heating  
appliance. Keep this with literature on other  
appliances where you have easy access to it  
in the future. If a problem occurs, check the  
instructionsandfollowtherecommendations  
given. If the suggestions do not eliminate  
your problem, call your NORDYNE Servicing  
Contractor (Service PRO).  
— QUE FAIRE S’UL Y A UNE ODEUR DE  
GAZ  
• Ne pas tenter d’allumer aucun appareil.  
• Ne toucher à aucun interrupteur  
électrique;n’utiliseraucuntéléphone  
dans le bâtiment.  
• Appeler  
immédiatement  
le  
fournisseur de gaz en employant le  
téléphone d’un voisin. Respecter à  
la lettre les instructions du  
fournisseur de gaz.  
Any additions, changes, or conversions  
required in order for the appliance to  
satisfactorily meet the application needs  
mustbemadebyaqualifiedinstaller, service  
agency, or the gas supplier using factory  
specified and approved parts.  
• Si personne ne répond, appeler le  
service des incendies.  
— L’installationetl’entretiendoiventêtre  
effectués par un installateur qualifié,  
un organisme de service ou le  
fournisseur de gaz.  
 
80+ AFUE  
8
1 Ignitor  
2 Flame Sensor  
(Not Shown)  
3 Gas Valve  
4 Flame Roll-out  
Switch(s)  
5 Pressure Switch  
6 Control Board  
7 Blower Door  
Switch(s)  
8 Exhaust Adapter  
9 Low Voltage  
Transformer  
10 Burner Assembly  
11 Supply Air Limit  
Switch  
14  
13  
6
3
1
5
9
10  
11  
7
4
12 Blower Assembly  
13 Induced Draft  
Blower  
12  
14 Vent Transition  
Upflow/Horizontal Furnace  
80+ AFUE  
15  
13  
8
9
11  
1
4
9
2
7
12  
3
16  
5
10  
6
14  
6
14  
10  
7
5
2
12  
3
4
1
13  
11  
Upflow/Horizontal Furnace  
Downflow Furnace  
1 Ignitor  
8 Vent Assembly  
(Upflow Only)  
9 Vent Switch  
10 Low Voltage  
Transformer  
11 Burner Assembly  
12 Supply Air Limit  
Switch  
14 Induced Draft  
Blower  
15 Combustion Tube  
w/insulation  
(Downflow Only)  
16 Vent Transition  
Assembly  
2 Flame Sensor  
3 Gas Valve  
4 Flame Roll-out  
Switch(s)  
5 Pressure Switch  
6 Control Board  
7 Blower Door  
Switch  
(Downflow Only)  
13 Blower Assembly  
Figure 1. Furnace Parts Identified  
3
 
90+ AFUE  
19  
18  
10  
18  
4
12  
15  
17  
19  
16  
7
8
1
6
2
3
11  
15  
10  
5
5
7
13  
9
13  
9
17  
14  
11  
2
8
12  
3
1
14  
16  
4
Upflow/Horizontal Condensing Furnaces  
Downflow Condensing Furnace  
8 Blower Door Switch  
9 Vent Safety Switch  
10 Low Voltage  
Transformer  
1 Ignitor (Not Shown)  
2 Flame Sensor (Not  
Shown)  
14 Condensate Drain  
Tube  
15 In-Line Drain  
Assembly  
3 Gas Valve  
4 Flame Roll-out  
Switch(s)  
5 Pressure Switch  
6 Vent Pressure  
Switch (93+ Only)  
7 Control Board  
11 Supply AIr Limit  
Switch  
12 Circulating Air  
Blower Assembly  
13 Induced Draft  
Blower  
16 Burner View Port  
17 Front Header Box  
18 Combustion Air  
Intake  
19 Exhaust Vent  
Figure 2. Furnace Parts Identified  
4
 
90+ AFUE Two - Stage Models  
20  
19  
7
20  
11  
8
5
17  
12  
7
3
6
9
16  
6
4
16  
8
14  
10  
11  
18  
18  
14  
10  
9
4
12  
3
13  
5
15  
17  
15  
Upflow/Horizontal Furnace Models  
Downflow Furnace Models  
1 Ignitor (Not Shown)  
2 Flame Sensor (Not  
Shown)  
3 Primary Gas Valve  
4 Secondary Gas Valve  
5 Flame Roll-out Switch(s)  
6 Pressure Switch  
7 Vent Pressure Switch  
8 Control Board  
10 Vent Safety Switch  
11 Low Voltage  
16 In-Line Drain  
Assembly  
Transformer  
17 Burner View Port  
18 Front Header Box  
19 Combustion Air  
Intake (Not Shown  
on Upflow Model))  
20 Exhaust Vent  
(Not Shown on  
12 Supply Air Limit Switch  
13 Circulating Air Blower  
Assembly (Not Shown  
on Downflow Model)  
14 Induced Draft Blower  
15 Condensate Drain  
Tube  
9 Blower Door Switch  
Downflow Model)  
Figure 3. Furnace Parts Identified  
5
 
80+ AFUE Two - Stage Models  
10  
1
2
5
4
3
11  
8
6
9
13  
7
12  
Upflow/Horizontal Furnace  
1 Ignitor  
2 Flame Sensor  
3 Gas Valve  
4 Flame Roll-out  
Switch(s)  
7 Blower Door  
Switch  
8 Vent Assembly  
9 Low Voltage  
Transformer  
11 Supply Air Limit  
Switch  
12 Blower Assembly  
13 Induced Draft  
Blower  
5 Pressure Switch  
6 Control Board  
10 Burner Assembly  
Figure 4. Furnace Parts Identified  
6
 
under water. A flood-damaged furnace is  
extremelydangerous.Attempstousethefurnace  
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.  
GENERAL INFORMATION  
This furnace has been designed and built to  
provide many years of safe and dependable  
home comfort, providing it is properly installed  
and maintained. With regular maintenance, this  
furnacewilloperatesatisfactorilyyearafteryear.  
Abuse, improper use, and/or improper mainte-  
nance can shorten the life of the furnace and  
createhazardsforyou. Pleasereadthismanual  
carefully to familiarize yourself with operation,  
maintenance, and safety procedures for this  
furnace.  
Familiarize yourself with the controls that shut  
off the gas and electrical power to the furnace.  
If the furnace is to be shut down for an extended  
periodoftime, turnoffboththegasandelectrical  
power. For your safety always turn off both the  
gas and electrical power before performing  
service or maintenance on the furnace.  
A regular service and maintenance schedule  
should be established to insure efficient and  
safe operation of the furnace. See Section 5 for  
maintenance procedures and schedules.  
2. Combustion Air Supply  
A furnace needs an adequate supply of  
combustion and ventilation air for proper and  
safe operation. Follow the installation  
instructions included with the furnace to  
properly vent air to the combustion air inlet  
and exhaust the products of combustion to  
the outside from the exhaust vent.  
Devices attached to the flue or vent for the  
purpose of reducing heat loss up the chim-  
ney have not been tested and have not  
been included in the design certification  
of this furnace. We, the manufacturer, can  
not and will not be responsible for injury  
For 90+ and 93+ Models: If the furnace is  
operatedwitharestrictedcombustionairsupply,  
the pressure switch will open, turning off the gas  
supply to the burners. (See Figures 2 and 3).  
DO NOT install a jumper wire across this switch  
to defeat its function. If this switch must be  
replaced,useonlythereplacementpartspecified  
in the Replacement Parts List.  
1. Safety Information  
The furnace area and the vicinity of any other  
gas appliance must be kept clear and free of  
combustible materials, gasoline, and other  
flammable vapors and liquids. Do not store or  
use flammable items such as paint, varnish, or  
strippers in the vicinity of the furnace.  
For 80+ Models: If the furnace is operated with  
inadequate combustion air supply, the flame roll-  
out control switch located above the burners may  
open, turning off the gas supply to the burners.  
The flame roll-out control is a manually resettable  
device (See Figure 1 and 4). DO NOT install a  
jumperwireacrossthisswitchtodefeatitsfunction.  
DO NOT reset the control without identifying and  
correcting the fault condition which caused the  
control to trip. If this switch must be replaced, use  
only the replacement part specified in the  
Do not use the furnace closet or area next to the  
furnace as a storage area. This area must be  
kept clear, clean, and free of lint. The furnace  
must also be kept clear of loose or exposed  
insulation materials. Examine the furnace area  
when the furnace is installed or when insulation  
is added. Some insulation materials may be  
combustible.  
For proper and safe operation, the furnace  
needs air for combustion and ventilation. Do not  
block or obstruct air openings on the furnace, or  
any air openings where the furnace may be  
installed, including any surrounding spaces.  
Replacement Parts List.  
Air openings in warm air registers, and return air  
grilles must not be restricted.  
Should the gas supply fail to shut off or if  
overheating occurs, shut off gas valve to the  
furnacebeforeshuttingoffelectricalsupply.  
!
CAUTION:  
Combustion air must not be drawn  
from a corrosive atmosphere.  
Do not use this furnace if any part has been  
7
 
beconnectedtoanyotherheatproducingdevice  
airmustbefreeofchemicalswhichformcorrosive such as a fireplace insert, stove, etc. Doing so  
Tomaximizeheatexchangerlife,thecombustion  
may result in fire, explosion, personal injury,  
carbonmonoxidepoisoning,orpropertydamage.  
acidic compounds in the combustion gases.  
Someexamplesofthesechemicalsarechlorine,  
fluorine, and sulphur. Some common sources of  
these chemicals are detergents, bleaches,  
Use a type high velocity air filter in the return air  
aerosol sprays, cleaning solvents, and a wide duct to maintain a clean heat exchanger.  
variety of commercial and household products.  
3. Return Air Supply  
!
WARNING:  
In applications where the supply ducts carry  
heated air to areas outside the space in which  
the furnace is installed, the return air must be  
delivered to the furnace by duct(s) sealed to the  
furnace casing. These duct(s) must be full size  
and without interruption in the spaces outside of  
where the furnace is installed.  
Failure to prevent products of com-  
bustionfrombeingcirculatedintothe  
living space can create potentially  
hazardous conditions including car-  
bon monoxide poisoning that could  
result in personal injury or death.  
The return air duct connection(s) must be  
physically sound and sealed to the furnace  
casing to prevent products of combustion from  
entering the living space.  
4. Vent System  
The furnace must always be connected to an  
approved vent pipe to carry the furnace  
combustion products outdoors. At the beginning  
and end of each heating season, inspect the  
outdoor vent terminal closely with a flashlight to  
determine if any of the conditions listed under  
the following warning exist.  
The floor or platform on which the furnace is  
mounted must provide sound physical support  
of the furnace with no gaps, cracks, or sagging  
between the furnace and floor or platform. The  
return air and circulating air ductwork must not  
FREQUENCY OF MAINTENANCE  
BEGINNING OF END OF EACH  
MAINTENANCE ITEM  
EACH HEATING SEASON HEATING SEASON MONTHLY  
VERIFY FURNACE AREA IS FREE  
OF COMBUSTIBLE MATERIALS  
X
X
X
X
X
X
X
X
X
VERIFY COMBUSTION AND VENTILATION  
AIR IS NOT RESTRICTED  
VERIFY NO SIGNS OF PHYSICAL  
DETERIORATION OF THE FURNACE  
VERIFY NO OBSTRUCTIONS OR  
RESTRICTIONS IN VENT OR CHIMNEY  
X
X
X
X
X
X
VERIFY NO HOLES OR CRACKS IN VENT PIPE  
VERIFY NO CORROSION IN VENT PIPE  
VERIFY THAT HORIZONTAL VENT PIPES  
SLOPE UPWARDS AWAY FROM FURNACE  
X
X
X
VERIFY BURNER FLAME  
X
X
CLEAN OR REPLACE FILTER(S)  
CLEAN BLOWER COMPARTMENT  
CLEAN BURNER ASSEMBLY  
X
Table 1. Maintenance Table  
8
 
air blower motors used in these furnaces are  
pre-lubricated and sealed at the factory. No  
further oiling of the bearings is required for the  
life of the motor.  
5. Maintenance  
Propermaintenanceismostimportanttoachieve  
the best performance from this furnace and  
should be performed by a qualified service  
technician. Follow the maintenance schedule  
(see Table 1) and the following instructions for  
years of safe, trouble free operation.  
Blower Compartment — The blower  
compartment should be cleaned monthly during  
the heating and cooling seasons to remove any  
dirt and lint that may have accumulated in the  
compartment or on the blower and motor. Build-  
up of dirt and lint on the blower and motor can  
create excessive loads on the motor resulting in  
higher than normal operating temperatures and  
possible shortened service life.  
Do not place combustible materials on  
or against the furnace cabinet.  
Do not store gasoline or any other  
flammable vapors and liquids in the  
vicinity of the furnace.  
Annuallyinspectthefurnace,ductwork,  
and vent system for signs of physical  
deterioration.  
Changeorreplacetheairfiltersmonthly  
during any period when the circulating  
blower is operating regularly.  
Alwaysreplacethedoorsonthefurnace  
afterservicingorcleaning/changingthe  
filters. Do not operate the furnace  
without all doors and covers in place,  
except to check burner operation.  
Avoid operating the furnace when  
windows and doors are open.  
Be sure that the thermostat is properly  
installed and is not being affected by  
drafts or heat from lamps or other  
appliances.  
Burner Maintenance — Check the burner  
flames at the start of every heating season. Set  
the thermostat to a temperature setting above  
the room temperature. Remove the top door  
from the furnace and visually inspect the burner  
through the view hole to make sure that the  
flame is drawn into the center of the heat  
exchanger tube (See Figure 5). In a properly  
adjusted burner assembly, the flame bends  
down and to the right at the end of the heat  
exchanger tube, and the end of the flame will be  
out of sight around the bend. The flame color  
shouldbeblue,howeversomelightyellowstreaks  
may occur on the outer portions of the flame.  
Air Filter(s) — Air filter(s) are not supplied with  
the furnace as shipped from the factory. The  
installer must provide a high velocity filter and  
rack in the return air duct adjacent to the furnace,  
or in a return air grille to the furnace. The filter(s)  
mustberemovedandcleanedmonthlyduringthe  
heating season to ensure proper furnace  
operation. New or newly renovated homes may  
require more frequent changing until the  
construction dust has been removed.  
!
CAUTION:  
Some components in the burner  
vestibule are at high temperatures  
whiletheburnersareoperating.Use  
caution to avoid personal injury.  
Flame  
Burner  
!
WARNING:  
Neveroperatethefurnacewithouta  
filter in place. Dust and lint in the  
returnaircanbuildupontheinternal  
components, resulting in a loss of  
efficiency, equipment damage, and  
possible fire.  
Always replace the door(s) on the furnace after  
servicing or cleaning/changing the filters. Do not  
operate the furnace without the door(s) in place.  
Manifold  
Figure 5. Burner Inspection  
Lubrication — The bearings in the circulating  
9
 
6. Operating Instructions  
!
READ THE SAFETY INFORMATION ON  
THE FOLLOWING PAGE BEFORE  
OPERATING.  
WARNING:  
Do not operate your furnace if you  
findanyofthefollowingconditions.  
Such conditions may allow toxic  
fumes to escape into your home:  
• Obstructions or restrictions in  
the vent pipe and/or chimney.  
• Holes or cracks in the vent pipe.  
• Visiblecorrosionintheventpipe.  
• Horizontal vent pipes that do not  
slope upward.  
!
WARNING:  
Shouldoverheatingoccur,orthegas  
supply fail to shut off, shut off the  
manual gas valve to the furnace  
before shutting off the electrical  
supply.  
Ifanyoftheaboveconditionsarefound  
in the vent pipe, call a qualified service  
technician to install new vent pipe.  
!
ADVERTISSEMENT:  
Encasdetempératureexcessive,ou  
s’il est impossible de couper  
l’alimentationengaz,fermerlerobinet  
manuel d’alimentation en gaz du  
générateur d’air chaud avant de  
couper l’alimentation électrique.  
For 80+ upflow and downflow models only:  
Burner Maintenance (NOx), If the second or  
eighth character of the model number is an “N”  
the furnace has factory installed NOx reduction  
inserts. The inserts reduce the NOx emissions  
of the furnace. The NOx reduction inserts are  
located in the first pass of the top portion of the  
heat exchanger. When the burners are  
operating, the flame should extend through the  
center of the NOx reduction inserts. The flame  
color should be blue, however some light yellow  
streaks may occur on the outer portions of the  
flame.  
These furnaces are equipped with roll-out limit  
switch(s), a vent safety switch, and a pressure  
switch(SeeFigures1, 2, 3and4). Thepressure  
switch verifies that the flame is receiving  
combustion air. If the flame is not drawn into the  
heat exchanger tube, the roll out limit switch or  
flame sensor, will shut the furnace down.  
The vent safety switch shuts the furnace down  
if the vent becomes blocked or restricted.  
Inspect the burners, mounting brackets, and all  
other parts in the vestibule for signs of  
deterioration. The burner vestibule should be  
vacuumed clean and inspected annually.  
Furnace Fails To Operate — If the furnace  
does not operate, check the following:  
1) Is the thermostat operating properly?  
2) Are the blower door(s) in place?  
3) Is the furnace disconnect closed?  
4) Has the circuit breaker tripped (or fuse  
blown)?  
!
CAUTION:  
Do not strike any of the internal  
electrical components while  
vacuuming.  
5) Is the gas turned on?  
6) Is the filter dirty or plugged?  
10  
 
If the combustion and circulating air blowers are  
operating, and items 1 through 6 have been  
checked without identifying the cause of the  
problem, press the red reset buttons on the vent  
safety and the roll out limit switches. (See  
Figures 1, 2, 3 and 4).  
IMPORTANT: If the furnace operates after  
depressing the reset button on the vent limit  
or roll out limit, it is an indication of a  
potentiallyseriousproblemintheinstallation.  
Contact a qualified serviceman to identify  
and repair the problem.  
MANUFACTURER WARRANTY, OWNER RESPONSIBILITIES  
It is the sole responsibility of the homeowner to make certain the gas furnace has been correctly  
set up and adjusted to operate properly.  
The Manufacturer warrants the furnace to be free from defects in material or workmanship for the  
warranty period. However, the Manufacturer will not be responsible for any costs found necessary  
to correct problems due to improper set-up, improper installation, furnace adjustments, improper  
operating procedure on the part of the user, etc.  
Some specific examples of service calls which cannot be included in warranty payments are:  
1. Repairing duct work in the home found to be faulty.  
2. Correcting wiring problems in the electrical circuit supplying the furnace.  
3. Re-setting circuit breakers or other switches.  
4. Correction of problems due to improper gas supply pressure to the furnace.  
5. Providing instructional training on how to light and operate the furnace.  
6. Furnace problems caused by installation of an air conditioner, heat pump, or other air comfort  
devices.  
7. Revising installation of the vent assembly.  
8. Adjusting or calibrating of the thermostat.  
Carefully review these responsibilities with your dealer, service company, or gas supplier so there  
will be no misunderstanding at a later time.  
Read Your Warranty  
Please read your limited warranty completely. It contains valuable information about your furnace.  
If you have any questions about the warranty information, contact your distributor.  
11  
 
7082220 (Replaces 7081670)  
¢708222y¤  
Specifications and illustrations subject to change  
without notice and without incurring obligations.  
Printed in U.S.A. (01/03)  
7082220  
 

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