Williams 4505621 User manual

owner's manual
MODEL NOS:
4505622; 6005622
FOR USE WITH
NATURAL GAS ONLY
MODEL NOS.
4505621 ; 6005621
FOR USE WITH
LIQUEFIED
PETROLEUM (L.P.)
GAS ONLY
INSTALLATION & OPERATING INSTRUCTION MANUAL
GRAVITY VENTED FLOOR FURNACE
60056 MODEL SERIES SHOWN
READ THIS OWNER'S
MANUAL CAREFULLY
BEFORE YOU INSTALL
YOUR NEW WILLIAMS
FLOOR FURNACE
WARNING: Improper installation, adjust-
ment, alteration, service or maintenance
can cause injury or property damage.
Refer to this manual. For assistance or
additional information consult a qualified
installer, service agency or the gas
supplier.
WARNING: Do not install any of these fur-
naces (Natural or L.P. Gas) in mobile
homes, traders, or recreational vehicles.
lWARNING: If the information in this
manual is not followed exactly, afire or ex-
plosion may result causing property
damage, personal injury or loss of life.
-- Do not store or use gasoline or other flam-
mable vapors and liquids in the vicinity
of this or any other appliance.
-- WHAT TO DO IF YOU SMELL GAS
•Open all windows.
•Do not try to light any appliance.
•Do not touch any electrical switch; do
not use any phone in your building.
• Extinguish any open flame.
•Immediately call your gas supplier from
a neighbor's phone. Follow the gas
supplier's instruction.
•if you cannot reach your gas supplier,
call the fire department.
-- Installation and service must be per-
formed by a qualified installer, service
agency or the gas supplier.
WILLIAMS Furnace Co., 225 Acacia St., Colton, CA 92324
PRINTED IN USA 4/99 P322436

Your Warranty
The Manufacturer, Williams Furnace Co.. warrants this wall furnace or heater to the original purchaser under the following conditions:
LIMITED ONE.YEAR WARRANTY
1. Any part thereof which proves to be defective in material or workmanship within one year from date of original purchase for use will be repaired or replaced at the
Manufacturer's option, FOB its tactory,
2, No liability is assumed by the Manufacturer for removal or installation labor costs, nor for freight or delivery charges,
LIMITED EXTENDED WARRANTY
1, In addition to the above limited one-year warranty on the complete unit, any heat exchanger which burns out or rusts under normal installation, use and service
conditions during a period of nine years following expiration of the one-year warranty period will be exchanged for a like of functionally similar part, FOB Manofac-
turer's factory,
2. No liability is assumed by the Manufacturer for removal or installation labor costs, nor for freight or deliveP/charges,
LIMITATIONS
1. THIS LIMITED WARRANTY IS THE ONLY WARRANTY MADE BY THE MANUFACTURER. _MPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR
ANY PARTICULAR PURPOSE ARE LIMITED TO THE SAME ONE YEAR TERM AS THIS EXPRESS WARRANTY. UNDER NO CIRCUMSTANCES SHALL THE
MANUFACTURER BE LIABLE FOR INCIDENTAL, CONSEQUENTIAL. SPECIAL OR CONTINGENT DAMAGES OR EXPENSES ARISING DIRECTLY OR INDIRECT-
LY FROM ANY DEFECT IN THE PRODUCT OR ANY COMPONENT OR FROM THE USE THEREOF. THE REMEDIES SET FORTH HEREIN ARE THE EXCLUSIVE
REMEDIES AVAILABLE TO THE USER AND ARE IN LIEU OF ALL OTHER REMEDIES,
Some states do not allow _imitations on how long an implied warranty lasts, and some states do not allow the exclusion or limitation of iocidental
or consequential damages, so the above limitations or exclusions may not apply to you,
2. This warranty does not include any charge for labor or installation.
3, This warranty does not extend to painted sudaces nor to damage or defects resulting from accident, alteration, misuse or abuse, or improper installation.
4. This warranty does not cover claims which do not involve defective workmanship or materials.
DUTIES OF THE CONSUMER
1, The heating equipment must be instafled by a qualified installer and operated in accordance with the installation and homeowner's instructions furnished with the
equipment.
2. Any travel, diagnostic costs, service labor, and labor to repair the defective unit will be the responsibility of the owner.
3, A bill of sale, cancelled check, payment record or permit should be kept to verify purchase date to establish the warranty period.
4. Have the installer enter the requested information in the space below,
GENERAL
1. The Manufacturer neither assumes nor authorizes any person to assume for it any other obligation or liability in connection with said equipment,
2. Service under this warranty should be obtained by contacting your dealer. Provide the dealer with the model number, serial number and purchase date verification.
3. If, within a reasonable time after contacting your dealer, satisfactory service has not been received, contact: Customer Service Dedartmenf, 225 Acacia St., Cohort,
CA 92324, for assistance.
4. THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS. AND YOU MAY ALSO HAVE OTHER RIGHTS WHICH VARY FROM STATE TO STATE.
INSTALLATION INFORMATION
Model No. Serial No
Orig. Purchaser_
Address
City and State
Dealer
Zip
Address
City and State_ Zip
Installation date Signed by. .(Dealer or
authorized representative who certifies that this appliance has been installed in accordance with Manufacturer's instructions and
local codes,)

BUILDING CODES AND SAFETY STANDARDS
THE DESIGN OF THIS FURNACE IS NOT CERTIFIED FOR USE IN MOBILE HOMES, TRAVEL
TRAILERS OR CAMPERS. THIS FURNACE MUST BE PROPERLY VENTED TO THE OUTSIDE
FOR SAFE OPERATION. DO NOT OPERATE THIS FURNACE WITHOUTAN ADEQUATE VENTING
SYSTEM.
THE DESIGN OF THIS APPLIANCE COMPLIES WITH ANSI Z21.48.
THE SECTIONS OF THIS MANUAL PERTAINING TO VENTING AND GAS PIPING PROVIDE ONLY
BASIC GUIDELINES. BE SURE THE INSTALLATION OF THE VENT AND GAS PIPING COMPLIES
WITH LOCAL CODES. IN THE ABSENCE OF LOCAL CODES, BE SURE TO COMPLY WITH THE
NATIONAL FUEL GAS CODE ANSI Z223.1.
IMPORTANT GENERAL INFORMATION
Read these instructions completely before beginning the installation and use these instructions as a guide during the installation.
Your furnace has been carefully designed and constructed. The design of this furnace has been tested according to the
standards set by the American National Standards Institute, and the design has been certified by the American Gas Association
as conforming to these standards. Care has been taken to assure that your furnace will operate safely, efficiently, and
reliably, but your furnace must be properly installed. Only a licensed or otherwise qualified gas equipment installer should
install this furnace, the vent serving this furnace, and the gas piping. Installation procedures should comply with these
instructions and the latest edition of the American National Standard National Fuel Gas Code Z223.1. You should also refer
to any local codes or ordinances which may apply. Improper installation of the furnace, vents or gas piping, can subject you
and your property to fire, explosion, or asphyxiation hazards and will void the warranty offered by Williams Furnace Co. Do
not be satisfied with an improper installation.
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 under water.

Safety Rules
WARNING 4. LOCATE the furnace out of traffic patterns as much as
READ THESE RULES AND THE INSTRUCTIONS
CAREFULLY. FAILURE TO FOLLOW THESE
RULES AND INSTRUCTIONS COULD CAUSE A
MALFUNCTION OF THE FURNACE. THIS COULD
RESULT IN DEATH, SERIOUS BODILY INJURY,
AND/OR PROPERTY DAMAGE.
possible with a minimum of 6" clearance from all
combustible walls and 15" on two adjoining sides of the
grille for passage.
5. BE SURE to provide for adequate combustion and
ventilation air. The flow of this air to the furnace must not
be blocked.
INSTALLATION MUST CONFORM TO LOCAL CODES. IN
THE ABSENCE OF LOCAL CODES, INSTALLATION MUST
CONFORM WITH THE NATIONAL FUEL GAS CODE, ANSI
Z223.1.
INSTALLATION AND REPAIR SHOULD BE DONE BY A
QUALIFIED SERVICE TECHNICIAN. THE CLEANED
FURNACE SHOULD BE INSPECTED BEFORE USE AND
AT LEAST ANNUALLY BY A PROFESSIONAL SERVICE
TECHNICIAN. MORE FREQUENT CLEANING MAY BE
REQUIRED DUE TO EXCESSIVE LINT FROM SOME
CARPETING, BEDDING MATERIAL, ETC. IT IS
IMPERATIVE THAT CONTROL COMPARTMENTS,
BURNERS AND CIRCULATING AIR PASSAGEWAYS OF
THE FURNACE BE KEPT CLEAN.
YOUNG CHILDREN SHOULD BE CAREFULLY
SUPERVISED WHEN THEY ARE IN THE SAME ROOM
WITH THE FURNACE.
6. USE joint compound (pipedope) on threaded joints of gas
piping that is resistant to the action of liquefied petroleum
gas.
7. USE only ground joint unions in gas piping.
8. INSTALL amanual shutoffvalve and union ahead of the
controls so that the controls and furnace may be removed
for servicing, if necessary.
9. INCLUDE a 1/8 NPT plugged tapping accessible for test
gauge connection immediately upstream of the gas
supply connection to the furnace.
10. NEVER test for gas leaks with an open flame. Use soap
suds to check all gas connections. This will avoid the
possibility of fire or explosion.
11. INSTALL the furnace to a proper venting system
ANY SAFETY SCREEN, GUARD OR PARTS REMOVED
FOR SERVICING AN APPLIANCE MUST BE REPLACED
PRIOR TO OPERATING THE APPLIANCE TO AVOID
PROPERTY DAMAGE, BODILY INJURY OR DEATH.
12. DO NOT place clothing or other flammable material on
or near furnace.
13. DO NOT modify or alter the furnace cabinet in any way.
CHILDREN AND ADULTS SHOULD BE ALERTED TO THE
HAZARD OF HIGH SURFACE TEMPERATURE AND
SHOULD BE KEPT AWAY TO AVOID BURNS OR
CLOTHING IGNITION.
14. BE SURE factory installed grille is in place during
operation.
15. DO NOT connect this furnace to a chimney serving a
solid-fuel burning appliance.
1. USE ONLY MANFACTURER'S REPLACEMENT
PARTS. USE OF ANY OTHER PARTS COULD CAUSE
INJURY OR DEATH.
16. CLEAN the furnace and periodically inspect the pilot and
burner flame as described in the maintenance section of
this manual.
2. BE SURE furnace is for type of gas to be used. Check
the rating plate beneath the grille. Do not change itto
useothergases. Unsafe operationcould resultandcould
cause bodily injuryand death.
3. BE SURE the furnace isinstalledso that the drafthood is
located in the same atmospheric pressure zone as the
combustion air inlet to the furnace.
17. DISCONNECT the furnace during supply line pressure
testing.
18. FOLLOWthe lighting and operating procedures given in
this manual.
19. WARNING: Any change to this furnace or its controls
could cause injury or death.
WARNING /
DO NOT USE THIS HEATER IF ANY PART HAS BEEN UNDER WATER. IMMEDIATELY CALL A QUALIFIED |
SERVICE TECHNICIAN TO INSPECT THE HEATER AND TO REPLACE ANY PART OF THE CONTROL SYSTEM J
AND ANY GAS CONTROL WHICH HAS BEEN UNDER WATER.
-4.

KEEP THESE INSTRUCTIONS
All furnaces require a supply of oxygen for combustion. To
assure thisfurnace receives the necessary oxygen, two free
air openings of at least one square inch for each 1,000 BTU
per hour input rating of the furnace must be provided in the
foundation ofthehouse (see figure 1). Besure theseopenings
are located where the air can flow to the furnace and is not
likelyto be blocked.
This furnace is equipped with atemperature limit control
that limitsthe register temperature under normal conditions
of operations. This control may be overidden under unusu-
al cimumstances, such as extremely cold weather, to allow
more heater output from this heater. Acomplete explana-
tion of the operation of this control is contained in the
"Operating The Furnace" section of these instructions.
An inspection of the furnace and attached systems should
be performed at least once each year by aqualified service
technician. More frequent inspections are advisable if the
furnace is installed or operated in a manner that might cause
the accumulation of dust or dirt in the furnace or the failure of
component parts more rapidly than would normally be
expected. Keep all combustible materials, gasoline and other
flammable liquids or vapors away from this furnace, and be
sure that combustion and ventilation air openings supplying
this furnace are kept clear at all times.
FOR FUTURE REFERENCE
Continued safe and satisfactory performance ofthis furnace
requires, but isnot limitedto, periodicexaminationofthe vent
system, pilot flame, combustion chamber, liners and gas
supply lines and periodic cleaning of the burner air intake,
pilot and control areas. The venting system, including the
factory provided drafthood and all other parts of the vent,
must be inspected periodicallyfor indicationsoffailure, such
as loose joints, rusting components or broken parts. Any
defective or damaged part, which does not provide a
continuous conduit to carry the combustion productsto the
outside, must be replaced before the furnace isoperated. A
completedescriptionof theventing requirementsiscontained
inthe "Venting And Chimney Requirements" sectionofthese
instructions.
This furnace is designed to burn only the type gas that is
indicated on the rating plate, visible on the bracket directly
beneath the floor grille. Do not attempt to use this furnace
with any other type gas. If you are not sure what type gas is
available in your locality, obtain this information from your
local gas supply company.
The pilotand control system of this furnace willautomatically
stop the gas flow to the pilot burner and main burner if the
pilot flame is extinguished. This system also generates the
electricity required to operate the thermostat system. Since
no electrical power is required from any other source, this
furnace will continue to operate during a power outage•
FIGURE 1
OPENING
VENTING MUST COMPLY WITH "VENTING AND CHIMNEY REQUIREMENTS"
SECTION OF THIS MANUAL.
HEADERS
(I/4" RISE PER FOOT)
FLOOR FURNACE
DEPTH OF T
FURNACE
IB" MINIMUM
WORK SPACE
FROM
FURNACE PIT 12" MINIMUM ON ALL SIDES EXC_T CONIROL END OF FURNACE
•18" MINIMUM ON
CONTROL END OF FURNACE
-5-

Locating Floor Furnace
Consider the following points before attempting to install the
furnace:
1. To achieve the best results from this furnace, it must be
located in an area that will provide good circulation of air
to adjacent areas that need to be heated.
2. Warm air will rise from the furnace and travel to other areas
only through open doorways, and that air must return to
the furnace to be reheated.
3. Insmall homes, one unit centrally located may be sufficient
to meet the heating requirements, but it is impractical to
attempt to use this furnace where heat must travel through
more than one doorway before reaching an area where
heat is desired. A typical installation of a single unit in a
small home is shown by Figure 2.
4. In larger homes, it may be necessary to use two or more
units to provide sufficient heat distribution. It is often better
to use two small furnaces rather than one large one.
5. If there isadifference in thefloor level between two rooms
to be heated, the furnace should be located in a room with
the lower floor.
FLOOR
FURNA(
LIVING ROOM
AIR - BEDROOM
DINING ROOM H KITCHEN
I i I H
6. The flow of heat to various areas within the home can be
effectively regulated by the opening and closing of doors.
CLEARANCES
1. Minimum clearance between the floor furnace and
adjacent walls - 6".
2. Minimum clearance between furnace and doors,
draperies or other combustible materials within the
home -12".
3. Minimum spacerequired along two sidesof the furnace
to allow persons to walk around the furnace -15".
The thermostat should be located on an interior wall far
enough away from the furnace to prevent itfrom being heated
directly by the furnace. Select a location in the area most
frequently used or best situated to control the temperature of
the entire house. Avoid locations where the thermostat might
be subjected to drafts from windows, doors, stairways, etc.,
or from other devices such as cooking ranges, fireplaces,
television, etc. Place the thermostat about five (5) feet above
the floor. Do not select a location that willrequire more than
25 feet of wire between the furnace and the thermostat. Do
not install the thermostat in an area which can be isolated
from the furnace by a door.
FIGURE 2
LOCATION NOTE
Replacement floor furnaces of the same or lesser
Btu/h input rating may be installed in the same location
as the replaced furnace when such replacement does
not create an unsafe condition.
After you have selected a location that will provide the
necessary clearances and air circulation, check beneath the
house to be sure the clearances between the furnace and
the ground, as specified by Figure 1, can be obtained. It is
permissable to dig a shallow pit, as shown in Figure1, but a
pipe or trench should be provided to drain away any water
that may seep intothe pit. Ifthe depth of the pitmustexceed
12", or ifwater seepage islikely,a watertight pit ofgalvanized
steel, copper, concrete or other suitable material shouldbe
constructed and anchored intoplaceto preventitfrom floating.
The sides of this pan should extend four inches above the
ground. The clearances between the upper rim of the pan
and the furnace should be no less than those specified in
Figure 1.
The width, length and depthof each furnace model is shown
in Figure 6.
-6-

Venting And Chimney Requirements
Proper venting of this furnace is required to prevent the
release of hazardous gases into the dwelling. The furnace
must always be vented into a vertical vent. This vent may be
a listed type "B" gas vent or masonry chimney. The following
statements are intended as a guide for venting the furnace.
If other venting requirements are required by local codes,
the local codes must be adhered to.
If the furnace is to be vented into a masonry chimney, be
sure the chimney is lined, clean and in good repair. Be sure
the vent system is installed by a qualified installer and -
1. Do not connect this furnace to a chimney flue sewing
a seperate solid fuel (coal or wood) buming appliance.
Soot and creosote deposits from the solid fuel heating
appliance can block the vent serving this furnace.
2. If this furnace is to be connected to a chimney that
has previously been used for a solid fuel appliance,
clean the chimney thoroughly of all deposits that
might drop down and block the furnace vent.
3. The total length of the horizontal run of vent connector
pipe must not exceed 75 percent of the height of the
gas vent or chimney above the point where the vent
connector is attached. All venting material must be
supported by hangers spaced a maximum of four
(4) feet apart and attached to the floor joist or by
other methods approved by local codes.
4. The horizontal vent connector must be not less than
4 inches in diameter and not more than 6 inches in
diameter.
5. The horizontal vent connector must slope upward
from the furnace to the chimney at least 1/4 inch per
foot of connector length.
6. Avoid using a vent or chimney for more than one
furnace if it is practical, but if it is necessary to use
one vent for two furnaces, be sure the vent or chimney
has an interior liner at least 6 inches in diameter.
7. If two furnaces are connected to a chimney or vent
with a common vent connector, join the unit connectors
as shown in Figure 3. Do not join the vent connectors
with a tee. Be sure to size the vent connectors as
shown in Figure 3.
8. Use a thimble when attaching the vent connector to
a masonry chimney, and place the thimble at least 6
inches above the bottom of the chimney. Seal the
vent connector and thimble joint to prevent gases
from escaping.
9. Keep the vent connector at least 6 inches from all
combustible material and if the vent connector must
pass through a partition constructed of combustible
materials, use athimble in the partition that has been
listed for this use by anationally recognized testing
agency. An improperly installed vent connector can
overheat adjacent materials and cause adangerous
fire.
10. Be sure that there are no unsealed openings in the
vent or chimney that will decrease the chimney draft
and the chimney is at least 2 feet higher than all parts
of the building within 10 feet. This is required to
reduce the possibility of wind interfering with the draft
(see Figure 4).
11. If the furnace is to be vented into a masonry chimney,
be sure the chimney is lined, clean and in good repair.
12. Never terminate a vent pipe inside an attic, under
the building, in a closet or with a horizontal run of
vent pipe. The vent pipe must extend above the roof
of the building as shown in Figure 4.
FIGURE 3
-- FLOORFURNACE
DRAFTHOOD
VENT PIPE2
[_ 45°ELL
VENT PIPEI
45" Y BRANCH. DO NOT CONNECT
VENT PIPE TOGETHER AT 90°
ANGLES
"'Y" CONNECTION NO MORE THAN
12"' FROM VERTICAL FLeE
DO NOT EXTEND VENT PIPE PAST
INSIDE OF FLUE LINER
Size Vent Pipe 1 Size Vent Pipe 2 Size Vent Pipe 3
4"" 4"' 6'
5- 5" 7""
6- 6"" 8'
VENT PIPE
FLUE
WRONG RIGHT
13. Do not use an uninsulated vent pipe. An uninsulated
vent pipe can cause a fire hazard by overheating
adjacent combustible matedals. An uninsulatedvent
pipe can also cause condensation ofthe vent gases
within the pipe and retard the draft.
-7-

Gas Supply And Piping Requirements
Gas pipe must be installed by a qualified installer. The pipe
system must comply with the latest edition of the American
National Fuel Gas Code Z223.1. Figure 5 depicts the required
pipe arrangement at the furnace. The drip leg is required to
prevent condensate and scale particles from entering the
furnace controls. The union is required to allow the control to
be removed for servicing. All unions in gas pipe systems
shall be of the ground joint type. Use a pipe joint compound
that is resistant to liquified petroleum gases (LPG). Do not
locate pipe joints in a concealed location where leak detection
and repairs are difficult or impossible.
The maximum inlet supply pressure for this furnace must
be 7 inches for natural gas and 13 inches for LP gas. The
minimum inlet supply pressure for the purpose of input
adjustment must be 5 inches for natural gas and 11 inches
for LP gas. The control on this furnace is equipped with a
regulator which reduces the manifold pressure to 4.0 inch-
es for natural gas and 10.5 inches for LP gas.
If the furnace is equipped for LP gas, the gas tank must be
provided with a regulator which will reduce the line pressure
to the furnace to between 11 and 13 inches water column.
Unregulated LP gas pressure will damage the control and
cause it to leak hazardously
CAUTION: The furnace and its individual shutoff valve must
be disconnected from the gas supply piping system during
pressure testing of that system at test pressures in excess of
1/2 psig The furnace must be isolated from the gas supply
piping system by closing its individual manual shutoff valve
during any pressure testing of the gas supply piping system
at test pressures equal to or less than 1/2 psig Pressures in
excess of 1/2 psig will cause damage to the control valve
and may cause damage to the shutoff valve.
FIRST FLOOR r.
mGRILLE
STUD FRAME
FLOOR FURNACE
ROOM
@
pLIMIT SW1TCH
LEC_-- I I_--UNtON k
DRIP
f"SHUT-OFF
CAP VALVE CONTROL VALVIZ
_ HERMOSTA"
LEAD V_RES
FIGURE 5
UNPACKING AND INSPECTION
Remove the furnace from the carton and inspect carefully besure all problemsare resolvedbefore installingthefurnace
for shipping and handling damage or missing parts Report DO NOT INSTALL A DAMAGED FURNACE. A furnace
any damage or missing parts to your Williams dealer and that is damaged or in poor repair can be hazardous
8-

Installation
1. Lay an outline of the furnace in the selected location,
and draw diagonally from each corner of the outline as
shown in Figure 6.
2. Drive a nailthrough the flooringat the intersection ofthe
diagonal lines.
3. Use the nail location as a reference, and examine the
area beneath the floorto assure there are noobstructions
that will prevent the installation of the furnace and that
adequate clearance between thefurnace and theground
can be obtained. Ifthe selected locationofthe furnace is
appropriate, proceed to step 4.
4. Bore two 1" diameter holes in opposite corners of the
furnace outline. Be sure the holes do not extend beyond
the furnace outline.
5. Inserta compass or sabre saw into one ofthe 1"diameter
holes and cut along the furnace outline. Cut as straight
and accurately as possible to avoid any possibilitythe
holewillnotfit the furnace or willextend beyond the outer
perimeter of the furnace grille after it is installed.
6. Ifitisnecessarytocutflcorjoists toinstallthefurnace, install
headers across the cutends ofthe floor joists,and double
the floorjoists along each side of the furnace cut-out as
shown in Figure 7. If you must cut a girder or beam,
constructan adequatefoundationand pillartosupporteach
end of the cut member.
7. If necessary, dig a pit and install a pan in the ground
beneath the furnace to provide the required clearances.
8. Remove the grille from the furnace.
9. Lower the furnace intothe floor opening untilthe flanges
on the furnace cabinet rest on the floor.
11. Fasten the furnace in place by driving nails through the
sides of the furnace cabinet and intothe floorjoists.
12. Refer to Figure 10 on page 11 for the installation of
drafthood collars and the drsfthood.
13. Install the (2) drafthood collars and gaskets by
positioning the collars intothe (2) retangular openings
on the furnace, making sure gaskets are facina toward
14. Slipthe (2) drafthoodcollars overthe combustion chamber
outlets and engage the collars intothe furnace untilthe
gaskets presstightagainstthe furnace. Secure thecollars
to the furnace with (12) screws previously removed.
15. Check to be sure the drafthood collarsfitsnugly over the
combustion chamber outlets.
16. Install the drafthood by positioning the drafthood with
open side down. Slip over the drafthood collars making
sure the drafthood collars engage into the drafthood.
Secure the drafthood to the furnace with (4) screws
previously removed.
17. Install the pipe necessary to connect the furnace to the
gas vent or chimney. Be sure to comply with all the
requirements for proper venting as stated inthe "Venting
and Chimney Requirements" section of this manual.
18. Connect the furnace to the gas supply line as specified
by the "Gas Supply and Piping Requirements" sectionof
this manual (see Figure 5).
19. Install the thermostat and connect the thermostat lead
wires tothe limitswitchand controlas shown in Figure8.
FIGURE 6
1" DIA. HOLE FOR STARTING
LOCATION. DRIVE NAIL
THROUGH FLOORTO
LOCATECENTER
UNDERNEATH,
MODEL NUMBER WIDTH LENGTH DEPTH
4505621; 4505622 = 24-1/4 32-3/8 28
6005621; 6005622 = 24-1/4 42-5/8 28
FIGURE 7
NOTE :
IF TWO JOISTS ARE /
CUT,
HEADIER.
T_S SPACE MUST BE
THE SAME SIZE AS
THE OPENING CUT
-9-

Installation (cont.)
20. Turn on the gas and check all gas fittingsfor leaks with a
soapy water solution or a liquid leak detection solution.
DO NOT USE A FLAME TO CHECK FOR LEAKS.
The use of a flame for leak detection can cause a
dangerous explosion
21. Refer to the "Lighting and Operation" sectionof this
manual. Carefully read the safety information, then light
the pilotand main burner according to the instructions.
Allow the main burner to burn for five minutes,
see Figure 11 for typical burner flame pattern.
FIGURE 8
DIAGRAM OF WIRING CONNECTIONS
FOR 450 &: 600 FLOOR FURNACE
UMIT
THERMOSTAT
VALVE
I GEN
O
ICa_E"ATO"I
L,oo.,.o,vALv_I_,F.".%"_T,T
AUX I
o'1
I L_M,TI .o_:
DO NOT CONNF.CT TO UNF" VOLTAGE.
-10-