Page 1
USER'S INFORMATION MANUAL
FOR TDH SERIES FURNACES
We're pleased you've chosen our gas furnace Co supply your heating needs. Please keep this manual in a
safe, yet readily available place. It contains important and useful information.
ATTENTION, INSTALLER: After installing furnace, give the user:
• User's Information Manual • Parts List
• Installation Instructions • Warranty Information
ATTENTION, USER! Your furnace installer should give you the above four important documents relating
to your furnace. Keep these as long as you do your furnace. Pass these documents on to later purchasers or
furnace users. If any of the four documents are missing or damaged, contact your installer or furnace
manufacturer for replacement. For efficient service, please give your furnace model and serial number,
from Section 1 or from your furnace rating plate.
Д
If the information in this manual is not followed exactly^ a fire or explosion may
result causing property damage, personal injury or loss of life
• 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.
• Installation and service must be performed by a qualified installer or the gas
supplier.
WARNING
A WARNING
Read and follow all safety information in this manual, operating instructions and
furnace safety labels. Failure to follow safety precautions could result in damage,
injury or death.
IMPORTANT SAFETY NOTE: You must know how to turn off gas and electricity to furnace. Your
qualified installer, service agency or gas supplier can teach you to use controls and switches.
A
Do not use this furnace If any part has been under water. Immediately call a qualified
service technician to inspect the furnace and to replace any part of the control system
and any gas control which has been underwater.
Thank you for reading these safety statements. Please read on so
you will know how to maintain your furnace for years of
dependable service.
WARNING
MANUAL: 2100-287
SUPERSEDES:
FILE: VOL, I, TAB 2
DATE: 07-18-97
Page 2
TABLE OF CONTENTS
SECTION 1 Rating Plate Information..................................................... 1
SECTION 2 Important Safety Precautions..............................................1
SECTION 3 Understanding How Your Furnace Works..........................3
SECTION 4 Turning Off Furnace in an Emergency
SECTION 5 Operating Your Furnace..................................................... 6
SECTION 6 Proper Maintenance of Your Furnace
...............................
.................................
4
7
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SECTION 1 • RATING PLATE INFORMATION
Record the manufacturer’s name, unit mode] number and serial number below. These are your furnace rating plate.
Record installation date which is important for warranty purposes.
YOUR FURNACE INFORMATION
Furnace Type
Manufacturer’s Name
Model Number
Serial Number
Date Installed
Installer/Servicer,
Address_________
City/State/Zip Code.
_______
_______
Telephone Number
SECTION 2 • IMPORTANT SAFETY PRECAUTIONS
2.A HAZARD ALERT SYMBOL
An exclamation point surrounded by a triangle.
2.B SIGNAL WORDS
Years of safe, dependable service are assured when
you understand and follow all safety precautions.
REMEMBER: Your furnace contains flames, gas,
electricity, rotating parts and metal edges.
Signal words "WARNING” and “CAUTION” alert
you to potential hazards.
"WARNING” indicates a potentially hazardous
situation which, if not avoided, could result in death or
serious injury.
"CAUTION” indicates a potentially hazardous
situation which, if not avoided, may result in minor or
moderate injury. It may also be used to alert against
unsafe practices. It can also be used to signal property
damage only potential.
2.B. SAFETY PRECAUTIONS
These are some of our most important safety
precautions; others are throughout this manual. Please
read and follow them.
A
2.1 GAS AND COMBUSTION PRODUCTS
A WARNING
Any condition that will allow gas of combustion
products to enter furnace area can cause
nausea, asphyxiation or fire resulting in
damage, injury or death.
Natural gas and propane (LP) gas have characteristic
odors. When your furnace is operating correctly, you
should not smell any unfamiliar odor. Normally,
burning gas with air produces combustion products
which contain carbon dioxide, oxygen and water vapor.
Under abnormal conditions, combustion products and
contain aldehydes and carbon monoxide.
* Aldehydes have a strong pungent, acrid smell that can
cause nausea.
• Carbon monoxide is tasteless, colorless and odorless.
It can cause headaches, flu-like symptoms or nausea.
We refer to all these symptoms as nausea in this
manual. It can also cause death by asphyxiation.
Manual 2100-287
Page 1
Page 4
A WARNING
A WARNING
Any unfamiliar smell can alert you to presence
of gas or aldehydes. If you detect any
unfamiliar odor follow instruction in Section
4.B.1. Otherwise, nausea, asphyxiation or fire
could occur resulting in damage, injury or
death.
A WARNING
Do not block or cover combustion openings in
the furnace door or closet door. Blocking or
covering these openings could cause nausea,
asphyxiation or fire resulting in damage, injury
or death.
A WARNING
Do not block or cover any openings from
outside the furnace area which supply
combustion and ventilation air to your furnace.
Keep insulation away form these openings.
Blocking or covering these openings could
cause nausea, asphyxiation or fire resulting in
damage, injury or death.
A WARNING
A loud noise may mean faulty burner ignition.
If your furnace makes a loud noise, turn it off.
Follow instructions in Section 4.B.2. If you don’t
turn off your furnace, it could cause fire or an
explosion resulting in damage, injury or death.
Do not operate furnace with blower door open
or removed. Do not alter furnace to allow
operation with blower door removed. Doing
either could allow combustion products to
circulate throughout the furnace area causing
nausea, asphyxiation or fire resulting in
damage, injury or death.
A WARNING
Front door must be in place during furnace
operation. Hot surfaces behind front door.
2.2 STORAGE AND USE OF FLAMMABLE,
CORROSIVE AND COMBUSTIBLE
PRODUCTS NEAR YOUR FURNACE
A WARNING
Never store or use flammable liquids or vapors
near or on your furnace. These include
gasoline, kerosene, cigarette lighter fluid,
cleaning fluids, solvents, paint thinners or
painting compounds. Flammable vapors can
travel great distances before igniting.
A WARNING
A WARNING
If your furnace is in an attic or other insulated
space, keep all insulating materials at least 12
inches away from its burner combustion air
openings. Block or covering these openings could
cause nausea, asphyxiation or fire resulting in
damage, injury or death. Examine furnace area
when the furnace is installed or when insulation is
added to that area. Insulation materials may be
combustible.
Manual 2100-287
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Never store or use anything near or on your
furnace that can produce vapors that are
corrosive to gas-fired furnaces. Vapors from
products containing chlorines, fluorines,
bromines and iodines can cause vent system or
heat exchanger failure. Examples of such
products are spray or aerosol containers,
detergents, bleaches, cat litter, waxes,
adhesives, solvents and other cleaning
compounds. Vent system or heat exchanger
failure could cause nausea, asphyxiation or fire
resulting in damage, injury or death.
Page 5
3.1 BASIC FURNACE - HEATING CYCLE
Never store anything combustible near or on
your furnace. These include brooms,
dustmops, vacuum cleaners, other cleaning
toots or items, plastic or plastic containers,
paper bags or other paper products. A fire
could occur resulting in damage, injury or
death.
B.3. ALTERATION OF FURNACE CONTROLS
A WARNING
Do not alter any gas or electrical controls (gas
control, pilot or safety controls) in any manner.
Altering them could cause furnace to operate
unsafely resulting in damage, injury or death.
SECTION 3 • UNDERSTANDING HOW
YOUR FURNACE WORKS
This furnace is operated by an Integrated Furnace
Control (IFC) which controls all functions of the
furnace.
On a call for heat from the thermostat, the IFC first turns on
the inducer motor. The pressure switch then closes
signaling the IFC to proceed with ignition function.
There is a 36 second ignitor heat-up period, then the gas
valve opens introducing main burner gas to be ignited by the
hot surface ignitor. The flame sensor proves ignition and
carryover across all burners.
There is a 30 second delay after main burner is on until the
comfort air blower starts on heating speed. After the
thermostat is satisfied, the burners will go off as gas
valve closes. The inducer will continue to nm for 30
seconds, and the comfort air blower will continue to nm
approximately two minutes.
3.2 ACCESSORIES (OPTIONAL, FIELD
INSTALLED)
The furnace and IFC are designed to accommodate both
electronic air cleaner and humidifier. The electronic air
cleaner circuit is powered anytime the comfort air
blower runs on either heating or cooling speed. The
humidifier circuit is powered anytime the inducer motor is
operating.
Your installer should have given you a detailed explanation
of how the furnace operates. Shown below are the basic
operation characteristics and sequence of operation. If you
have any questions consult your installer and/or service
agency.
* * IMPORTANT * *
There are many types of thermostats
compatible with this furnace. Make sure you
understand the specific type installed. Ask
installer for detailed explanation, and retain
thermostat instruction manual for reference.
This furnace is equipped with a vent shut-off system which
monitors the combustion air into the burners by means of a
pressure sensing device. When the vent or air intake pipes
become blocked, this device turns off the gas valve circuit to
prevent flue products from entering the structure. In the
event that this occurs, shut off furnace and contact a
qualified service agency.
3.3 COOLING CYCLE OPERATION
If optional add-on air conditioning system is installed, the
comfort air blower runs on cooling speed will run
continuously during the call for cool; and will stop 60
seconds after the thermostat is satisfied.
3.4 MANUAL FAN (CONTINUOUS AIRFLOW)
OPERATION
If wall thermostat is set to MANUAL (ON) position to
operate comfort air blower continuously to provide air
circulation throughout the building, the blower will
operate on the heating speed rather than the cooling as is
typical with most systems. This permits the air to
circulate as desired but helps keep the operating noise
level down as well as conserving energy.
During a call for cooling, the blower automatically shifts up
to cooling speed, and remains there until 60 seconds
after thermostat is satisfied then drops back to heating
speed.
Manual
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2100-287
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SECTION 4 • TURNING OFF FURNACE IN AN EMERGENCY
FIGURE 1 - TYPICAL GAS PIPING
A
Have a qualified installer, service agency or gas
supplier teach you location and operation of
gas and electrical shutoff devices. Ask them
any questions you have about this section. If
you don't turn off your furnace in an emergency
damage, injury or death could result.
In an emergency you MUST know how to turn off gas and
electricity. Find out how BEFORE THE EMERGENCY.
WARNING
A WARNING
Should overheating occur or the gas supply fail
to shut off, shut off the manual gas valve to the
furnace before shutting off the electrical supply.
Failure to do so can cause a fire or explosion
which could result in damage, Injury of death.
4.A GAS AND ELECTRICAL SHUTOFF DEVICES
1. GAS SHUTOFF DEVICES
In an emergency, you may not be able to reach all the
gas shutoff devices. You must know how to turn off
gas using any one of the three manual types:
a. Manual Shutoff Knob on Gas Control
Gas control location is behind door.
See Lighting and Shutdown Instructions in
Section 5 for more information.
To turn gas control furnace knob OFF, turn it
clockwise Use this same procedure when you
leave a vacation home vacant and do not want the
furnace to operate.
b. Manual In-Line Shutoff Valve in Gas Supply
Line
This valve is next to furnace. Figure 1 shows a
typical installation.
Normally, gas is ON when you turn the shutoff
valve handle parallel to gas pipe. Gas is OFF
when you turn handle 90" from gas pipe.
c. Manual Shutoff Valve at Natural Gas Meter
or Propane (LP) Gas Tank
Normally, natural gas is ON when you turn
shutoff parallel to gas pipe. Gas is OFF when
you turn shutoff 90“ from gas pipe. Some valves
require a wrench or other tools.
2. ELECTRICAL SHUTOFF DEVICES
In an emergency, you may not be able to reach both
of your electrical shutoff devices. Therefore, you
must know how to turn off electricity using either one
of them. Here are two types of electrical shutoff
devices:
a. There should be an electrical shutoff device
located on or immediately adjacent to the furnace.
b. There should be a separate circuit breaker or fuse
serving only the furnace located in the main
circuit breaker or fuse panel. Know its location
and make sure this device is clearly identified.
Manual 2100-287
Page 4
Page 7
4.B POSSIBLE EMERGENCIES AND
RECOMMENDED ACTIONS
A WARNING
c. Your furnace should now be off. If it is. call your
service technician or gas supplier,
d. If your furnace continuers to run, leave your
home or building immediately. Call your gas
supplier or fire department from a neighbor's
phone for help.
If gas or electricity is off due to an
emergency, only a qualified installer, service
agency or gas supplier should turn it back on.
Doing it yourself could result in damage, Injury
or death.
1. Possible Emergency: Smelling gas or other
unfamiliar smell; or not knowing what may be wrong
or that to do about it.
ACTION: For your safety -
a. Leave your house or building immediately.
b. Go to a neighbor’s or another building.
c. Use their telephone.
d. Call your gas supplier. Tell them you smell gas
and give them your name and address.
e. If you cannot reach gas supplier, call fire
department.
A WARNING
Three important things not to do -
1. Don’t try to light any gas appliances.
2. Don’t touch any electrical switches
3. Don’t use the telephone in your house or
building.
Any of the above may cause a spark which
could cause a fire or explosion resulting in
damage, personal injury or death.
2. Possible Emergency: Your therTnostat is set below
room temperature; yet even though the blower is on,
the air coming from your room registers continually
gets hotter.
ACTION:
a. Turn room thermostat to its lowest or OFF
setting,
b. If you can do so safely, turn gas off. Use manual
shutoff valve at gas meter or on propane (LP) gas
lank. You may need a wrench or tools. If you
can safely turn off electricity at the main circuit
circuit panel, do so. If you cannot do these things
safely, leave your home or building immediately.
Call your gas supplier or fire department from a
neighbor’s phone for help.
3. Possible Emergency : Your thermostat is set above
room temperature. The blower is on but the air
coming from your room registers is hot, then cold,
then hot, then cold in a continuing cycle. This
condition indicates lack of airflow through furnace.
ACTION:
a. Make sure air filter is clean and installed
correctly.
b. Check that registers and return air grilles are
open and unobstructed.
c. If condition continues, call your local qualified
service technician or gas supplier.
4. Possible Emergency: While furnace is operating,
you smell unfamiliar odors that go away when
furnace is off.
A WARNING
Unfamiliar odors may mean gas or aldehydes
are present which could result in damage, injury
or death.
ACTION:
a. Tlim thennostat to its lowest or OFF setting.
b. Move gas valve control level to OFF.
c. If blower is not operating, immediately turn of
electricity to furnace using shutoff device near
furnace or at main circuit panel.
d. If blower is operating, wait five minutes for
furnace to cool down and then turn off electricity
to furnace using shutoff device near furnace or at
main circuit panel.
e. Call your local qualified service technician or gas
supplier,
5. Possible Emergency: Main electrical circuit breaker
for furnace cannot be reset without tripping again or
new fuses continue to blow.
ACTION:
a. Move gas valve control level to OFF.
b. Call your local qualified service technician or gas
supplier.
Manual 2100-287
Page 5
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SECTION 5 • FURNACE
OPERATING YOUR
A
WARNING
After reading the Safety Information and Precautions follow
Operating Instructions on from door of furnace and
instructions repeated here.
A
WARNING
If you do not follow these instructions exactly
a fire or explosion could occur resulting in
damage, injury or death.
FIGURE 2
FOR YOUR SAFETY READ BEFORE OPERATING
WARNING: ff you do not fotow those instructions exactly, a fire or
explosion may nssuR causlno prapor^ damage, penontf kijufyoriossoriife.
A. This emiisnea dost not tum « pitot. It is oquipptd with
«n ignition dnrica which auwnsticiitv lidm ths burner.
Do NOT try to llÿit the bunwr by hend.
B.
WHAT TO DO IF YOU SMELL GAS
* Do rKR try to light any tpplienea.
*Oo not touch eny eleetrlc «wltdt; do not uw eny
* tmmedletelv cell your lupplier from e neighbor'i
BEFORE OPERATING «nell at) wound the eppllenee
em for gu. Be fure to vnell next to the floor beoauM
H b heevier then eir end will nttlc on the floor.
phone in your building.
phone. FqUow the gn lupplier'i Uittmctiom.
Never use tools to turn gas control knob. Only
use your hand. If gas control knob will not turn
by hand, do not force it or try to repair it. Call a
qualified installer, service agency or gas
supplier. Forcing knob can cause gas to leak
which could result in fire or explosion.
Properly operating your furnace requires certain abilities,
mechanical skills and tools. If you are uncertain about your
abilities or if you lack proper skills or tools, do not proceed.
Instead, contact a qualified installer, service agency or gas
supplier.
An automatic ignition device lights the burners. Do not try
to light manually. See Figure 2 for step by step instructions.
*lf you ewxtot reich your gat «ippliw; cell the fir«
depertmenL
Uh only your herxl to push in or move the gw control
lever. Newr me toolt. If the lever will not pueh in or
turn by heiKl. don't try to repair It, call a qualified lervice tachnician. Force or attempted repair may ratult
in a ftra or axplmion.
D.
Do not uw thh appllanee if any part hai been under weler.
Immedietely call e quellfled lervioe uchnlclen to inspect
the eppUanoi arxl to replace any part ol the control tyi-
tem aivl any gat control whidt hat been under water.
1. Sat the thermoetat to lovmt setting,
2. Turn off all Nactrle power to the
3. rtemove contro* Ml
Manual 2100-287
Page 6
OPERATING INSTRUCTIONS
STOP! Read the tafety Information above on thb label,
Sat the thennoctat to loweet lettlng.
Turn off all electric power to the ippllanoe.
Thñ ^iplience b equipped with an Ignition daviea which
eutomatieellv llghtt the burner. Do NOT try to light
the burner by harvl.
TO TURN OFF GAS TO APPUANCE
is to be performed.
5. Ramowe oordtol accasa panel.
B. Puah In gas control knob
7. Wall five ^ mlrijtas to ctear out any gas. Than smell
8. Turn gae control knob couniBrdockwlse|' \ to 'OTT.
B. Raplaca conbol aocats panel.
10. Turn on aO electrfc. power to the appflanee;.
11. Set Ihetinoatat to desired setting.
12. M the appllenoe wfH not operate, folow the Insbucliors
4. Pudi In
S. Aepleei control I
In gas
NOTE: Knob carvwt be tumad to *OFF unisas knob Is
pushed In sUghtly. Do not toroa.
for gaa, hnekiding near the floor. If you amoD gas, STOP!
Follow “B' In the safety Monnation above on Ms label.
H you doni smMI gas, go to the next stop.
'To Turn Off Qas To Appfianca" end call your aervio»
tect«ila№ or ges euppber.
Ootm
control
WP.
to
pe centi III lever sllpHly end move to "OFF".
slightly and turn
796(F509
Page 9
SECTION 6 • PROPER MAINTENANCE OF YOUR FURNACE
You need special abilities, mechanical skills and tools to
maintain your furnace properly. If you are uncertain about
your abilities or if you lack proper skills or tools, do not try
to maintain or repair you furnace yourself. Instead, contact a
qualified installer, service agency or gas supplier.
6.A IF YOU SMELL GAS OR ANY UNFAMILIAR
SMELL WHILE WORKING ON YOUR
FURNACE:
6.D KEEP AIR FILTER{S) CLEAN
As a user, your personal responsibility is to keep air
filter(s) clean.
A CAUTION
A dirty air filter{s) reduces system efficiency
and can cause erratic control performance.
These could result in damage to blower motor
or heat exchanger.
1. Do not try to light main burners.
2. Do not touch or turn on any electrical switch.
3. Do not use any phone in your building.
4. Immediately call your gas supplier from a
neighbor’s phone. Follow gas supplier’s
instructions.
5. If you cannot reach your gas supplier, call fire
department.
6.B LUBRICATION REQUIREMENTS
The main blower motor and the induced draft blower
motor are permanently lubricated, and no
maintenance is required.
6.C MAKE SURE AIR FILTER(S) IS IN PLACE
Ask your installer, local qualified service technician
or gas supplier to make sure your filter{s) is in place
properly. Become familiar with its location and
procedures for removing, cleaning and replacing it.
Recommended filter size for the TDH furnaces is
15 X 20 xl with a quantity of two (2) required.
1 During the first four weeks after your furnace is
installed, inspect your air filter(s) for dirt every
week. Then check the filters monthly and clean as
necessary.
2 If the filter(s) is of a washable type, clean filter(s)
according to the manufacturer’s specifications.
A WARNING
After cleaning or changing filter(s), filter access
cover(s) must be replaced. Failure to do so
could cause nausea, asphyxiation, or fire
resulting in damage, injury or death.
6.E DO NOT OBSTRUCT DUCT WORK
For proper operation, keep registers and return air
grilles open. Do not cover or block them with rugs,
carpets, drapes or furniture.
A WARNING
Operating furnace without clean airfilter(s) can
damage blower motor, heat exchanger or air
conditioning system components. This can
cause system failure which could result in
damage or injury.
6.F HAVE YOUR FURNACE CHECKED
ANNUALLY
The fitmace and the vent, and the combustion air
intake piping system (if provided) should be
inspected yearly by a qualified service agency,
generally prior to the heating season. Detailed
Manual 2100-287
Page 7
Page 10
procedures for this inspection are contained in the
instructions booklet and should be handled by the
qualified service agency only-
A general inspection of the furnace, the furnace area
and the vent piping system should be conducted on a
regular basis by the owner/occupant. This review
should include:
1. Make sure the furnace always has the minimum
clearance as detailed on the furnace rating
plate. Special attention must be given to these
items if any remodeling is done.
2. Make sure the vent piping system is in place and
is physically sound without holes, sags or dips.
3. Reviewing that 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 so as to provide a seal between the support
and the base.
5. Inspect for any obvious signs of deterioration of
the furnace,
6. Periodic examinations of the vent piping system
should also be conducted by the owner on a
regular basis, preferably every monthly but at
least every two months during the heating
season.
7. Check the entire vent system for any blockage.
If any debris is present remove it.
8. Make sure that vent connector from the furnace
slopes upward and is physically sound without
holes or excesssive corrosion.
6.G THE FOLLOWING PROCEDURE SHOULD
BE FOLLOWED FOR THE PERIODIC
INSPECTION AS CONDUCTED BY THE
OWNER/OCCUPANT.
1. Set the wall thermostat to the OFF position or
lower the set point lever to a temperature will
below the existing room temperature. Shut off
electric power to the ftimace. A switch should
be mounted either on the outside of the furnace
or adjacent to the furnace for this purpose.
2. Remove the outer panel that has ventilating slots
in it.
3. Use flashlight or trouble light to observe the
burner compartment and burners. There should
be very miiumal scaling or sooting in this area.
Some loose debris may have fallen down on to
the floor of the heat exchanger form the tube
passageways, and this may be vacuumed out.
Also observe the sides of the heat exchanger
tubes for “hot spots” due to improper burner
alignment or overfiring and give particular
attention to any area where it looks like there
may be any deterioration from corrosion or
rusting. Observe for any corrosion on the burners
themselves. Should anything appear
questionable, contact your service agency.
4. Inspect the vent pipe the full distance from the
furnace to the vent terminal; observing for any
possible leakage that might result in products
combustion entering the living area.
A WARNING
Leakage of products of combustion into the
living area may result in asphyxiation resulting in
injury or death
5. Restore the electrical power to the furnace by
turning the switch back on. Adjust the
thermostat to call for heating operation.
6. Observe the main burners in operation. The
flame should be mostly "blue” with possibly a
little "orange” at the tips of the flames. The
flames should be in the center of the heat
exchanger tubes and not impinging on the sides
of the tubes themselves. Refer to Figure 3.
7. Observe the fire until the blower starts (there is a
normal delay period until the heat exchanger
warms up). There should be no change in the size
or shape of the flame. If there is any wavering or
blowing of the flame on the blower start-up. it is
an indication of a possible leak in the heat
exchanger. Turn off the gas valve in the gas line
leading to the furnace, and then the main
electrical switch to the furnace and call your
service agency.
8. Replace the slotted outer furnace door.
FIGURE 3
of
Manual
Page
2100-287
8
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