owner's manual
MODEL NOS:
4505622; 6005622
FOR USE WITH
NATURAL GAS ONLY
MODEL NOS.
4505621 ; 6005621
INSTALLATION & OPERATING INSTRUCTION MANUAL
GRAVITY VENTED FLOOR FURNACE
FOR USE WITH
LIQUEFIED
PETROLEUM (L.P.)
GAS ONLY
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.
60056 MODEL SERIES SHOWN
manual is not followed exactly, a fire or ex-
plosion may result causing property
l WARNING: If the information in this
damage, personal injury or loss of life.
-- Do notstore 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.
Orig. Purchaser_
Address
City and State
Dealer
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,)
Serial No
Zip
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 aguide 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 aqualified 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.
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.
6. USE joint compound (pipe dope) 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 a manual 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
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.
1. USE ONLY MANFACTURER'S REPLACEMENT
PARTS. USE OF ANY OTHER PARTS COULD CAUSE
INJURY OR DEATH.
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 is installed so that the drafthood is
located inthe same atmospheric pressure zone as the
combustion air inlet to the furnace.
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
AND ANY GAS CONTROL WHICH HAS BEEN UNDER WATER.
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.
16. CLEAN the furnace and periodically inspect the pilot and
burner flame as described in the maintenance section of
this manual.
17. DISCONNECT the furnace during supply line pressure
testing.
18. FOLLOWthe lighting and operating proceduresgiven in
this manual.
19. WARNING: Any change to this furnace or its controls
could cause injury or death.
/
J
-4.
KEEP THESE INSTRUCTIONS
FOR FUTURE REFERENCE
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). Besuretheseopenings
are located where the air can flow to the furnace and is not
likelyto be blocked.
This furnace is equipped with a temperature limit control
that limits the 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. A complete 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 a qualified 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.
Continued safe and satisfactory performance ofthis furnace
requires, but is not limitedto,periodicexaminationof the 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 indicationsof failure, 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. Ifyou 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 will automatically
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•
OPENING
FIGURE 1
VENTING MUST COMPLY WITH "VENTING AND CHIMNEY REQUIREMENTS"
SECTION OF THIS MANUAL.
HEADERS
FLOOR FURNACE
(I/4" RISE PER FOOT)
FROM
FURNACE PIT
12" MINIMUM ON ALL SIDES
EXC_T CONIROL END OF FURNACE
DEPTH OF T
FURNACE
IB" MINIMUM
WORK SPACE
•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.
LIVING ROOM
BEDROOM
AIR -
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 is a difference in the floor level between two rooms
to be heated, the furnace should be located in a room with
the lower floor.
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 space required 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 will require 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.
FLOOR
FURNA(
KITCHEN
DINING ROOM H
I i I
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 shallowpit, 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 pitmust exceed
12", or ifwater seepage is likely,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.
H
-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 orchimney
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 a thimble in the partition that has been
listed for this use by a nationally recognized testing
agency. An improperly installed vent connector can
overheat adjacent materials and cause a dangerous
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
DRAFTHOOD
-- FLOORFURNACE
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'
WRONG RIGHT
VENT PIPE
FLUE
13. Do not use an uninsulated vent pipe. An uninsulated
vent pipe can cause a fire hazard by overheating
adjacent combustiblematedals. 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.
ROOM
GRILLE
FIRST FLOOR r.
m
p LIMIT SW1TCH
LEC_-- I I _--UNtON k
DRIP
f " SHUT-OFF
CAP VALVE CONTROL VALVIZ
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
STUD FRAME
FLOOR FURNACE
@
LEAD V_RES
_ HERMOSTA"
FIGURE 5
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 of the
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 the furnace and the ground
can be obtained. If the 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 of the 1"diameter
holes and cut along the furnace outline. Cut as straight
and accurately as possible to avoid any possibility the
holewill notfit the furnace or willextend beyond the outer
perimeter of the furnace grille after it is installed.
6. If itisnecessarytocutflcorjoists toinstallthefurnace, install
headers acrossthe 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 adequatefoundationandpillartosupporteach
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 into the 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 into the (2) retangular openings
on the furnace, making sure gaskets are facina toward
14. Slipthe (2) drafthoodcollars overthe combustion chamber
outlets and engage the collars into the furnace untilthe
gaskets presstightagainstthe furnace. Secure thecollars
to the furnace with (12) screws previously removed.
15. Check to be surethe drafthood collarsfitsnugly overthe
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 control as 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
DIAGRAM OF WIRING CONNECTIONS
FOR 450 &: 600 FLOOR FURNACE
UMIT
21. Refer to the "Lighting and Operation" sectionof this
manual. Carefully read the safety information, then light
the pilot and 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
THERMOSTAT
I Ca_E"ATO"I
L ,
VALVE
oo.,.o,vALv_I _,F.".%"_T,T
AUX I
I GEN
O
o'1
I L_M,TI .o_:
DO NOT CONNF.CT TO UNF" VOLTAGE.
-10-
Installation (cont.)
22. Check the vent or chimney performance by holding a
match near the edge of the drafthood as shown in Figure
12. If the flame is not pulled into the drafthood, the
chimney is not providing sufficient draft. This can allow
hazardous gases to escape the vent system. Find and
correct the causes of this malfunction.
23. Replace the grille on top of the furnace. The small clip
attached to the chain at the limit switch box should be
hung over a section of the grille so it can be used to
override the limit switch as described in the "Operating
the Furnace" section of this manual. Explain the
operation of the furnace to the homeowner and give
these instructions to the homeowner.
FIGURE 9
-- _N_ATOR
1 1/8" TO 1 I/4"
FIGURE 11 /_ [
FIGURE 12
PROPER FLAME
ADJUSTMENT
FIGURE 10
DRAFTHOOD_. /- DRAFTHOOD
COLLAR \ /COLLAR GASKET
PILOT
1/4"m _/8"
___
..... /
(OPEN SIDE ""'_I , - --_:'_-- " I
CHAMBER \
ASSEMBLY _
FLUE OUTLET
FLUE ---- I
OUTLET
o. .........
-UFURNACE
TER CASING
\
/
J
i
I I I
%
/
\
DRAFTHOODJ _- DRAFTHOOD
COLLAR
ASSEMBLY COLLAR GASKET
PLAN VIEW
-11-
_- COMBUSTION
CHAMBER
ASSEMBLY
FOR YOUR SAFETY READ BEFORE LIGHTING
I WARNING: If you do not follow these instructions exactly, a fire or explosion I
may result causing property damage, personal injury or loss of life.
I
A. This appliance has apilot which must be lighted • If you cannot reach your gas supplier, call the fire
by hand. When lighting the pilot, follow these
instructions exactly.
B. BEFORE LIGHTING smell all around the appliance
area for gas. Be sure to smell next to the floor
because some gasis heavier than air and will
settle on the floor.
WHAT TO go IF YOU SMELL GAS
• Do not try to light any appliance or strike a match.
• Do not touch any electric switch; do not use any phone
in your building.
• Immediately call your gas supplier from a neighbor's
phone. Follow the gas zupplier's instructions.
department.
C, Use only your hand to push in or turn the gas
control rod. Never use tools. If the knob will
not push in or turn by hand, don't try to repair
it, call a qualified service technician. Force or
attempted repair may result in a fire or explosion.
O. Do not use this appliance if any part has been
under water. Immediately call a qualified service
technician to inspect the appliance and to replace
any part of the control system and any gas
control which has been under water.
OPERATING INSTRUCTIONS
1. STOP! Read the safety information above on
this label.
2. Set the thermostat to lowest setting.
3. With the key, depress the control rod slightly
and turn pointer clockwise _> to"OFF".
PILOT CONTROL BUTTON
_ POINTER _'_
z
O
ROD
IGNITOR
4. Wait five (5) minutes to clear out any gas.
Then smell for gas, including near the floor.
If you smell gas, STOP! Follow "B" in the
safety information above on this label.
If you don't smell gas, go to the next step.
5. Find the pilot.
PILOT -_ HoLEOBSERVATION
6. Turn the control rod counterclockwise <_
to "PILOT',
7. Position yourself so the pilot can be seen
through the observation hole. Push the control
rod down fully and hold it down. Immediately
push the ignitor button.
Push the ignitor button again at five (5) second
intervals until the pilot is lit. After the pilot is lit,
continue to hold the control rod down for
about one (1) minute. Release the control rod
and it will pop back up. The pilot should remain
lit. If it goes out, repeat steps 2 through 7.
Alternate liQhtinq with a match: Fol[ow steps
2 through 6. Remove cover from observation
hole. Place a match in lighter rod, ignite and
lower to pilot burner (through observation hole).
Depress the control rod down fully and hold it
down for about one (1) minute after the pilot
lights. Release the control rod and it will pop
back up. The pilot should remain lit. If it goes
out, repeat steps 2through 7. Replace cover on
observation hole, making sure gasket is in place.
• If the pilot will not stay lit after several tries,
depress the gas control rod slightly and turn
to "OFF", and call your service technician or
gas supplier.
• If control rod does not pop up when released,
stop and immediately call your service technician.
8. Turn the control rod counterclockwise<_ to
-ON +"
9. Set thermostat to desired setting.
TO TURN OFF GAS TO APPLIANCE!
1. Set the thermostat to lowest setting, and turn clockwise _> to "OFF'.
2. With the key, depress the control rod slightly
-12-
Operating The Furnace
Always follow the instructions located beneath the furnace
grillewhen lightingthe pilot. To set the thermostat, turnthe
temperature selector to the highest setting until the heated
area reachesthe desired temperature, then movethe selector
slowly toward a lower setting until the furnace control cycles
off the burner. At this setting, the furnace should cycle on
and off as required to maintain the desired temperature.
WARNING
THE SURFACE OF THE FURNACE IS HOT DURING
OPERATION. KEEP CHILDREN, CLOTHING,
FURNITURE AND FLAMMABLE MATERIAL AWAY
FROM THE FURNACE.
This furnace is equipped with a control that limitsthe tem-
perature of the furnace grille by cycling the main burner.
This control may be overridden to allow more heat output
from the furnace during extreme weather when the furnace
will not provide sufficient heat otherwise. The overide
mechanism is located beneath the grilleonthe control end.
To override the temperature limit control, pull up on the
chain attached to the grille until the flap bearing the
"Register Hot--" warning is in the horizontal position. Insert
chain through slot to the side of the flap to hold flap in the
horizontal position (see Figure 13). To reactivate the tam-
perature limit control, remove chain from slot and the flap
will hang down. Do not override the temperature limit con-
trol if the furnace is in an area occupied by children or
elderly persons who could fall on the furnace and be
burned.
How To Care For Your Furnace
Service, repair or maintenance of the furnace, vent or gas
system should only be attempted by a qualified service
technician.
The burner and controlof the furnace should be cleaned and
checked at least once each year by a qualified service
technician. If there is any indication that the furnace is
operating improperly, turn it off and have it checked
immediately.
Lint and dust may be vacuumed from the interior of the
furnace, when it is cool, by removing the floor grille. The
control and main burner can be blown free of dust and lint
with a vacuum cleaner.
WARNING
FLAMMABLE LIQUIDS OR VAPORS NEAR THE
I DO NOT STORE OR USE GASOLINE OR OTHER
FURNACE.
If the combustion chamber must be removed for servicing -
1. Turn the gas off at the main gas line shut-off valve.
2. Remove the floor grille and lift out the inner casing.
3. Lift the control end of the combustion chamber slightly,
slide the chamber toward the end ofthe cabinet about
one inch and then lift it out of the cabinet.
WARNING
DANGER OF BODILY INJURY OR DEATH
DO NOT OPERATE THE FURNACE WITH A
BROKEN OR MISSING PILOT OBSERVATION
DOOR.
FIGURE 13
If the control and main burner assembly must be removed
for servicing -
1. Turn the gas off at the main shut-off valve.
2. Disconnect the union in the gas supply line_
3. Remove the thermostat control wires from the gas control.
4. Remove the nuts that attach the gas control to the furnace
outer casing.
5. Remove the control assembly.
6. Remove the screw that attache s the control end of the
burner to the outer casing.
7. Slide the bumer forward until the control end of the bumer
can be dror)peddow n and pul! the burne[ OUtof the outer
casing.
This should be done by a qualified service technician.
If the furnace will oot be used for a long period of time, turn
the control knob to the "OFF" positionand turn off the shut-
off valve in the gas line serving the furnace.
-13-
Troubleshooting Floor Furnace
SYMPTOM
1. Flame too large.
2. Noisy flame.
3. Yellow tip flame.
4, Floating flame.
5. Delayed ignition.
POSSIBLE CAUSE
A. Pressure regulator set too high.
B. Defective regulator.
C. Burner orifice too large.
A. Too much primary air.
B. Noisy pilot.
C. Burr inorifice.
A. Too little primary air.
B. Clogged burner ports.
C. Misaligned orifices.
D. Clogged drafthood.
A. Blocked venting.
B. Insufficient primary air.
A. Improper pilot location.
CORRECTIVE ACTION
Reset, using manometer.
Replace.
Replace with correct size.
See Item 1.
Reduce pilotgas.
Remove burr or replace.
Look forobstructions in air path.
Clean ports.
Realign or replace burner.
Clean.
Clean.
Look for obstructions inair path.
Reposition pilot.
6. Failure to ignite.
7. Burner won't turn off.
8. Rapid burner cycling.
9. Burner won't turn on.
B. Pilot flame too small.
C. Burner ports clogged.
D. Low pressure.
A. Main gas off.
B. Defect in gas valve.
C. Defective thermostat.
A. Poor thermostat location.
B. Defective thermostat or wiring.
C. Defective control valve.
A. Poor thermostat location.
B. Defective thermostat.
A. Defective control valve.
B. Defective thermocouple.
C. Defective thermostat.
Check orifice, increase gas.
Clean ports.
Adjust pressure regulator.
Open manual valve.
Replace.
Replace.
Relocate thermostat.
Replace or repair.
Clean or replace.
Relocate.
Replace.
Replace.
Replace.
Repair or replace.
D. Defective limit switch.
-14-
Replace.
(continued next page)
Troubleshooting Floor Furnace cont.
SYMPTOM
10. Not enough heat.
11. Too much heat.
POSSIBLE CAUSE
A. Thermostat set too low.
B. Appliance close to thermostat.
C. Thermostat in bad location.
JD. Thermostat out of calibration.
A. Thermostat set too high.
B. Thermostat out of calibration.
C. Valve sticks open.
D. Thermostat in draft.
CORRECTIVE ACTION
Raise setting.
Move heat source away.
Relocate thermostat.
Recalibrate or replace.
Lower setting,
Recalibrate or replace.
Replace valve.
Relocate thermostat.
-15-
REPLACEMENT PARTS FOR MODELS
4505621 4505622 6005621 6005622
KEY DESCRIPTION 4505621 4505622 6005621 6005622
NO.
1 P322426 P322429
GRILLE, FLOOR
2 480041 480042
INNER LINER ASSY
3 480056-1 4B0057-1
L.H. SECONDARY CHAMBER
4 480046 4B0047
COMBUS_ON CHAMBER
5 480056-2 480057-2
R.H. SECONDARY CHAMBER
6 480036 4B0069
OUTER SHIELD ASSY
PEEP HOLE COVER ASSY
7 12840 12840
8 P285500 P285500
IGNITOR
9 P322430 P322430
S_TCH, LIMIT
10 P322445 P322445
KEY, CONTROL
11 4A0037 4A0037
ROD, CONTROL
12 P322431 P322431
ROD, LIGHTER
13 P017000 P017000
_RE, THERMOSTAT
14 P322016 P322016
THERMOSTAT
CONTROL VALVE NAT.
15
CONTROL VALVE LP.G.
16 480019 4B0019 480019 4B0019
BRACKET, VALVE
MANIFOLD ASSY
17 4A0012 4A0012 4A0012 4A0012
PILOT NAT.
18
PILOT L.P.G.
SHIELD, BURNER
19 4B0014 4B0014 480010 4B0010
BURNER
20 P322417 P322417 P322418 P322418
21 P322439 P322439 P322439 P322439
GASKET, FLUE OUll..ET
DRAFI!-IOOD COLLAR ASSY
22 4B0072 480072 4B0072 4B0072
DRAF1]-IOOD ASSY
23 4B0026 480026 4B0026 480026
ENVELOPE ASSEMBLY
24 4B0024 4B0024 4B0024 4B0024
P322426 P322426
P322275 P322275
P322428
480041
4B0056-1
4B0046
480056-2
4B0036
12B40
P285500
P322430
P322445
4A0037
P322431
P017000
P322016
P322425
P322274 P322274
P322429
4B0042
4B0067-1
4B0047
4B0057-2
480069
12B40
P285500
P322430
P322445
4A0037
P322431
P017000
P322016
P322425
FOR PARTS ILLUSTRAllON, SEE PAGE 17
USE ONLY MANUFACTURES AUTHORIZED PARTS
NOTE: Screws, bolts and washers ore standard hardware items and may be purchased locally
-16-
WILLIAMS GAS FIRED FLOOR FURNACE
REPLACEMENT PARTS FOR
450 & 600 MODEL SERIES
(FLOOR FURNACE) FOR PARTS LISTING
USE ONLY MANUFACTURERS
AUTHORIZED PARTS
SEE PAGE 16
-17-
60056 MODEL SERIES SHOWN
NOTE: ITEMS 10, 13, 14 &: INSTALLATION
INSTRUCTIONS (NOT SHOWN) ARE
CONTAINED IN ITEM 24.
Notes
Notes
Service Hints
If your furnace fails to work right, you may avoid inconvenience and the cost c
a service call by checking the following points before you call for service.
FOR YOUR SAFETY FOR YOUR SAFETY
owners
manual
MODEL NOS.
FOR NAT. GAS ONLY
4505622; 6005622
MODEL NOS.
FOR L.R GAS ONLY
4505621;6005621
Do not store or use gasoline 1. Open windows.
or other flammable vapors and 2. Don't touch electrical.
liquids in the vicinity of this or any 3. Extinguish any open flame.
other appliance. 4. Immediately call your gas
POSSIBLE CAUSE WHAT TO DO
If your heater is not heating or not giving enough heat --
Thermostat is not set correctly.
Pilot is out.
Pilot is on but burner won't
come on.
Burner is not operating
properly.
Pilot goes out time after time --
Heater flue blocked.
If burner is noisy --
Gas input amount is incorrect,
Too much primary air.
If you smell gas:
supplier.
Reset thermostat to desired setting.
Check pilot. Relight if necessary
following instructions for "Operating
Your Heater."
If gas valve is set at other than "On"
heater will not operate. Shut heater
down and follow instructions for
relighting in "Operating Your Heater"
section.
Check flame. If it is yellow the burner
is not getting enough air. Or if flame
is blue and noisy and seems to lift off
the burner, the burner is getting too
much air.
Locate vent outlet blockage and
clean.
Contact Williams Service Department.
Contact Williams Service Department.
See troubleshooting section for more detailed information.
How to Order Repair Parts
When ordering repair parts, always give the following
information:
1. MODEL NUMBER
2. MFG. DATECODE
3, PART NUMBER
4. PART DESCRIPTION
WILLIAMS FURNACE COMPANY
All parts listed herein may be ordered from yourequipment
supplier.
The Model Number of your Williams floor furnace will be
found on the rating plate, visible on the bracket directly
beneath the floor grille.
MANUFACTURED
225 Acacia Street
Colton, CA 92324 USA
IN THE U,S.A.
Established 1916
(9o9)82s-0_3 FAX: (909) 824-8009
©1999 The Williams Fumace Company Printed in U.S.A. Rev. 4/99 P322436
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