MODEL:
Natural Gas
1773512
MODEL:
Propane Gas
1773511
Installation Instructions and Owner’s Manual
Direct-Vent Wall Furnace
WARNING: Improper installation, adjustment,
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: 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
• 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.
WARNING: Installation and repair must be
done by a qualified service person. The
furnace should be inspected before use and at
least annually by a professional service
person.
• Immediately call your gas supplier
from a neighbor’s phone. Follow
the gas supplier’s instructions.
• If you cannot reach your gas supplier,
call the fire department.
- Installation and service must be
performed by a qualified installer,
service agency or the gas supplier.
WARNING: If not installed, operated and
maintained in accordance with the
manufacturer’s instructions, this
product could expose you to substances in
fuel or from fuel combustion which can cause
death or serious illness and which are known
to cause cancer, birth defects or other
reproductive harm.
Williams Furnace Co., 250 West Laurel Street, Colton, CA 92324 U.S.A.
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Safety Rules and General Warnings
DO NOT OPERATE THIS FURNACE WITHOUT FRONT PANEL INSTALLED
•
•
Due to high temperatures, the furnace should be
•
More frequent cleaning may be required due to excessive
located out of traffic and away from any
combustible materials such as furniture and
draperies.
lint from carpeting, bedding materials, etc. It is imperative
that control compartments, burners and circulating air
passageways of the furnace be kept clean.
Children and adults should be alerted to the
hazards of high surface temperatures and should
stay away to avoid burns or clothing ignition.
•
•
DO NOT put anything around the furnace that will obstruct
the flow of combustion and ventilation air.
DO keep the furnace area clear and free from combustible
materials, gasoline and other flammable vapors and
liquids.
•
•
•
Young children should be carefully supervised
when they are in the same room as the furnace.
Clothing or other flammable material should not be
placed on or near the furnace.
•
•
•
DO examine venting system periodically and replace
damaged parts.
Any safety screen or guard removed for servicing a
furnace must be replaced prior to operating the
furnace.
DO examine burner periodically. Clean and replace
damaged parts.
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.
•
•
Keep burner and control compartment clean.
The outside vent cap is hot while furnace is in
operation.
•
Installation and repair should be done by a
QUALIFIED SERVICE TECHNICIAN. The furnace
should be inspected before use and at least
annually by a qualified service technician.
Safety Information for Users of LP Gas
Propane (LP Gas) is a flammable gas which can cause fires and explosions. In its natural state, propane is odorless and
colorless. You may not know all the following safety precautions which can protect both you and your family from an accident.
Read them carefully now, then review them point by point with the members of your household. Someday, when there may not
be a minute to lose, everyone’s safety will depend on knowing exactly what to do. If, after reading the following information, you
feel you still need more information, please contact your gas supplier.
LP Gas Warning Odor
If a gas leak happens, you should be able to smell the gas because of the odorant put in the LP Gas.
That’s your signal to go into immediate action!
•
•
•
•
Do not operate electric switches, light matches or use your phone. Do not do anything that could ignite the gas.
IMMEDIATELY get everyone out of the building, vehicle, trailer or area.
Close all gas tank or cylinder supply valves.
LP Gas is heavier than air and may settle in low areas such as basements. When you have reason to suspect a gas
leak, keep out of basements and other low areas. Stay out until firefighters declare them to be safe.
Use your neighbor’s phone and call a trained LP Gas service technician and the fire department. Even though you may
not continue to smell gas, do not turn on the gas again. Do not reenter the building, vehicle, trailer or area.
Have the service technician or fire department air out the area before you return. A properly trained LP Gas service
technician must repair the leak, check and relight the gas furnace for you.
•
•
2
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Some Points to Remember
•
•
•
•
Learn to recognize the odor of LP Gas. Your local LP Gas dealer can give you a ”Scratch and Sniff” pamphlet. Use
it to find out what the propane odor smells like. If you suspect that your LP Gas has a weak or abnormal odor, call
your LP Gas dealer.
If you are not qualified, do not light pilot lights, perform service, or make adjustments to appliances on the LP Gas
system. If you are qualified, consciously think about the odor of LP Gas prior to and while lighting pilot lights or
performing service or making adjustments.
Sometimes a basement or a closed–up house has a musty smell that can cover up the LP Gas odor. Do not try to
light pilot lights, perform service or make adjustments in an area where the conditions are such that you may not detect
the odor if there has been a leak of LP Gas.
Odor fade, due to oxidation by rust or absorption on walls of new cylinders and tanks, is possible. Therefore, people
should be particularly alert and careful when new tanks or cylinders are placed in service. Odor fade can occur in
new tanks or reinstalled old tanks if they are filled and allowed to set too long before refilling. Cylinders and tanks
which have been out of service for a time may develop internal rust which will cause odor fade. If such conditions
are suspected to exist, a periodic sniff test of the gas is advisable. If you have any question about the gas odor,
call your LP Gas dealer. A periodic sniff test of the LP Gas is a good safety measure under any condition.
If, at any time, you do not smell the LP Gas odorant, and you should, assume you have a leak. Then take
the same immediate action recommended when you do smell the odorized LP Gas.
If you experience a complete ”gas out” (the container is under no vapor pressure), turn the tank valve off immediately.
If the container valve is left on, the container may draw in some air through openings such as pilot light orifices.
If this occurs, some new internal rusting could occur. If the valve is left open, then treat the container as a new tank.
Always be sure your container is under vapor pressure by turning it off at the container before it goes completely
empty or having it refilled before it is completely empty.
•
•
Technical Data
mbar
in W.C.
mbar
in W.C.
mbar
in W.C.
mbar
in W.C.
m3/h
ft3/h
m3/h
ft3/h
m3/h
ft3/h
kW
4.25
14,514
5.19
7.7
3.1
NATURAL
GAS
OUTPUT HEATING CAPACITY
INPUT RATING
kBTU/hr
kW
MAX
MIN
26.4
10.6
4.6
LP
kBTU/hr
kW
17,700
3.84
MINIMUM INPUT RATING
(LO Input)
NATURAL
GAS
kBTU/hr
%
13,100
82.00
553
1.8
THERMAL EFFICENCY
LENGTH
16.3
6.6
LP
mm
in
21-3/4
715
0.5
NATURAL
GAS
mm
in
17.8
0.2
HEIGHT
DEPTH
MAX
28-1/8
208
LP
mm
in
6.9
8-1/4
26
0.4
NATURAL
GAS
kg
13.3
0.1
WEIGHT
m3/h
MIN
lbs.
57
LP
3/8
FEMALE
GAS CONNECTION
WALL HOLE DIAMETER
NPT
ft3/h
5.3
mm
in
50
2
mbar
in W.C.
mbar
in W.C.
m3/h
cfm
17.4
7.0
NATURAL
GAS
MINIMUM INLET
PRESSURE
mm
in
49
27.4
11.0
220
129
160
94
AIR INLET DIAMETER
EXHAUST PIPE DIAMETER
MIN WALL THICKNESS
MAX WALL THICKNESS
LP
1-7/8
35
mm
in
AIR FLOW
1-3/8
150
5-7/8
500
19-5/8
mm
in
m3/h
MINIMUM AIR FLOW
cfm
mm
in
TOTAL ELECTRICAL LOAD
W
86
3
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Installation
Installation should be done by a QUALIFIED SERVICE TECHNICIAN.
The furnace must be located on an outside wall.
Wall Installation
Minimum clearances from combustible materials:
WARNING: For the installation of this furnace, the
following items must be used in the vent air intake
system:
•
•
•
•
•
Unit to the top surface of carpeting, tile:
2-inches (50 mm)
Unit to back wall (0” to spacers):
0-inch (0 mm).
Vent to wall enclosure:
0-inch (0 mm)
Unit to sidewalls:
External Vent Cap
(Part Number: WFR–TRM000)
Flanged Air Inlet Tube
(Part Number: WFR–TBO002)
Flue Outlet Tube
3.15-inches (80 mm)
Unit to ceiling:
(Part Number: WFR–795)
O-Ring
10-inches (254 mm)
(Part Number: WFN–RNG003)
See Figure 1 showing clearance for installation of vent cap.
(All the above items are supplied with the furnace)
Leave at least three-feet in front of the wall furnace for
servicing and proper operation. The wall furnace must be
installed in such a way that the external casing can be completely removed for servicing.
If there is a shelf above the furnace, it must be non-combustible. A minimum clearance of 12-inches (300 mm) is recommended
between the furnace and the non-combustible shelf above it.
Gas equipment installed in residential garages must be installed so that all burners and burner ignition devices are located not
less than 18-inches (460 mm) above the floor. Such equipment must be located, or protected, so it is not subject to physical
damage by a moving vehicle.
The vent terminal of this direct-vent furnace must be located at least 9-inches (230 mm) from any opening through which flue
gases could enter a building. The bottom of the vent terminal and the air intake must be located at least 12-inches (300mm)
above grade.
DO NOT cover the furnace.
Make sure that the correct gas supply is available.
The furnace requires a 120 V 60 Hz electrical supply.
The appliance, when installed, must be electrically grounded in accordance with local codes, or in the absence of local codes
with the National Electrical Code ANSI/NFPA 70 (latest edition) or in Canada with CAN/CSA-C22.2 No. 3.
WARNING: The nearest point of the vent cap should be a minimum horizontal distance of six (6)
feet (1,830 mm) from any pressure regulator. In case of regulator malfunction, the six (6) feet
(1,830 mm) distance will reduce the chance of gas entering the vent cap.
4
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Figure 1
1 = Fixed/Closed
2 = Openable
V = Vent Terminal
A = Air Supply
A. Clearance above grade, veranda, porch, deck or
balcony 12-inches (30 cm) minimum. (3)
K. Clearance to a mechanical air supply inlet 6-feet (1.8 m)
minimum. (3)
B. Clearance to window or door that may be opened 12-
inches (30 cm) minimum. (3)
L. Clearance (1) above paved sidewalk or a paved driveway
located on public property 7-feet (2.1 m) minimum. (3)
C. Clearance to permanently closed window minimum 12- M. Clearance under veranda, porch, deck or balcony 12-
inches (30 cm) recommended to prevent condensation
on window.
inches (30 cm) minimum. (2), (3)
D. Vertical clearance to ventilated soffit located above the
terminal within a horizontal distance of 2-feet (60 cm)
from the centerline of the terminal 18-inches (46 cm)
minimum.
Notes:
(1)
(2)
(3)
A vent shall not terminate directly above a sidewalk
or paved driveway which is located between two
single family dwellings and serves both dwellings.
E. Clearance to unventilated soffit 12-inches (30 cm)
minimum clearance to vinyl soffit 36-inches (90 cm)
minimum.
Only permitted if veranda, porch, deck or balcony is
fully open on a minimum of two sides beneath the
floor.
F. Clearance to outside corner 12-inches (30 cm)
minimum.
As specified in CGA B149 installation codes (1991).
Note: Local codes or regulations may require different
clearances.
G. Clearance to inside corner 18-inches (46 cm) minimum.
H. Not to be installed above a meter/regulator assembly
within 3-feet (90 cm) horizontally from the centerline of
the regulator. (3)
I. Clearance to service regulator vent outlet 6-feet (1.8 m)
minimum. (3)
J. Clearance to nonmechanical air supply inlet to building
or the combustion air inlet to any other furnace 12-
inches (30 cm) minimum. (3)
Outside Location for Vent Terminal
Upon delivery, check to make sure the packaging has not been damaged.
1. Remove the furnace from box/packaging taking care not to damage the paper template to be used to mark the holes for
mounting the furnace.
2. After marking where the appropriate holes will be, using the above mentioned template, make a 2-inch (50.8 mm) diameter
hole.
3. Cut the combustion exhaust and fresh air inlet tubes according to the wall thickness (Figure 2):
Air inlet tube length = wall thickness + 3/32-inches (2.4 mm)
F
Flue outlet tube length = wall thickness + 1-5/16-inches (7.9 mm)
4. Drill the mounting holes “A” (5 holes) in the wall. If possible use self-tapping screws, drill 1/8-inch diameter holes. If self-
tapping screws cannot be used, drill 1/4-inch diameter holes and use the plastic anchors provided.
5
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5. Install the supporting bracket to the wall; insert the air pipe in the wall through the hole provided in the support bracket.
Place the round adhesive gasket around the hole so that the air pipe remains in position. (Figure 3)
6. Attach the supporting bracket with the screws. If possible use self-tapping screws. If self-tapping screws cannot be used,
use the plastic anchors provided.
7. Loosen the screws, remove the casing and disconnect the case grounding wire. (Figure 4)
Figure 2
A + 33.3 mm
A + 2.3
Figure 3
H
Figure 4
8. Place the adhesive spongy lining behind the unit. (Figure 4)
9. Attach the flue exhaust pipe end (diameter 1-3/8”) on the furnace male pipe connection (Figure 5). BE SURE THAT THE
RUBBER SILCONE O-RING GASKET IS IN POSITION.
10. Install the unit to the wall leaning the bottom edge of panel “C” (where the fan is located) on the supporting frame. (Figure
6) Attach the furnace to the support bracket with the two screws.
11. When inside installation is complete, proceed to the location of the vent cap on the external wall. The vent cap should
perfectly match the pipe end. Mark the location of the three holes for the screw anchors. (Figure 7) The flue grid must be
vertical.
6
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12. Remove the vent cap and drill all the necessary holes (diameter ¼ inch for the screw fittings provided with the furnace).
13. Relocate the vent cap and attach it with the screws. (Figure 7)
14. Attach the female end of the three-prong cord to the receptacle located near the bottom of the furnace.
15. Connect the gas supply line. A gas shutoff valve before the furnace must be installed.
16. Reconnect the grounding wire to the casing, attach the casing and tighten the screws.
17. Turn on gas supply and check for gas leaks with soapy water or other suitable means on all gas connections. Correct any
gas leaks before operating the furnace.
Figure 5
Figure 6
Figure 7
7
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Gas Conversions
Converting to another gas type must be performed by a qualified service technician. If the type of the gas supplied to the
dwelling is not the same type as your furnace (natural or LPG gas), it must be converted.
It will be necessary to do the following:
1. Change nozzle.
a. Remove the screw indicated
to the right.
2. Without removing anything else, remove the nozzle from the burner inserting the screwdriver as indicated by the arrow.
Nozzle
3. Change the nozzle, attach the screw indicated at point 1 and set the burner pressure as indicated in the table below:
Gas Type
Natural Gas
LP Gas
Nozzle Part Number
JGLL065
Nozzle Diameter
0.09 in.
JGLL067
0.05 in.
Minimum Inlet Line Gas
Pressure
Maximum
Manifold Gas Pressure
Minimum
Manifold Gas Pressure
Gas Type
Natural Gas
LP Gas
7.0-inches w.c.
11.0-inches w.c.
3.2-inches w.c.
10.6-inches w.c.
1.8-inches w.c.
6.5-inches w.c.
4. Check the gas pressure and settings.
Minimum Burner Pressure Setting:
1. Set LOW burner capacity by pressing button Z2
2. Connect a micro manometer to the test gauge B (Figure 8)
3. Rotate the internal screw “D” (Figure 8) and set the pressure at the correct value
Maximum Burner Pressure Setting:
1. Set HI burner capacity by pressing button Z2
2. Connect a micro manometer to the test gauge B (Figure 8)
3. Rotate the external screw “C” (Figure 8) and set the pressure at the correct value
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Gas Supply
Check all local codes for requirements, especially for the size and type of gas supply line required. On natural gas lines less than
15” (380 mm) long, use 1/2” tube; on longer runs, use 3/4” iron tube or equal. On LP Gas lines please consult LP Gas supplier.
Installing a New Main Gas Shutoff Valve
Each furnace should have its own manual gas shutoff valve. A manual main gas shutoff valve should be located in the vicinity of
the furnace. Where none exists, or where its size or location is not adequate, contact your local authorized installer for
installation or relocation.
Compounds used on threaded joints of gas piping must be resistant to the action of LP Gas. The gas lines must be checked for
leaks by the installer. This should be done with a soap solution watching for bubbles on all exposed connections, and if
unexposed, a pressure test should be made. Correct all gas leaks before operating the furnace.
Never use an exposed flame to check for leaks. The furnace must be disconnected from piping at inlet of control valve
and pipe capped or plugged for a pressure test. Never pressure test with furnace connected; the control valve will
sustain damage!
A gas shutoff valve and ground joint union should be installed in the gas line upstream of the gas control valve to aid in
servicing. It is required by the National Fuel Gas Code that a drip line be installed near the gas inlet. This should consist of a
vertical length of pipe tee connected into the gas line that is capped on the bottom in which condensation and foreign particles
may collect.
Use of the following gas connectors is recommended:
– ANSI Z21.24 Appliance Connectors of Corrugated Metal Tubing and Fittings., CGA 6.10.
– ANSI Z21.45 Assembled Flexible Appliance Connectors of Other Than All–Metal Construction.
The above connectors may be used if accepted by the authorities having jurisdiction.
Pressure Testing of the Gas Supply System
1. To check the inlet pressure to the gas valve, a plugged tapping, accessible for a test gauge connection, is provided on the
gas valve. (Figure 8 - A).
2. The furnace and its individual shutoff valve must be disconnected from the gas supply piping system during any pressure
testing of that system at test pressures in excess of 1/2 psig (3.5 kPa).
3. 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 (3.5 kPa).
Attention: If one of the above procedures results in pressures in excess of 1/2 psig (14” w.c.; 3.5 kPa) on the furnace gas valve,
it will result in a hazardous condition.
High Altitudes (US Only)
For altitudes/elevations above 2,000 feet (610 m), ratings should be reduced at the rate of 4-percent for each 1,000 feet (305 m)
above sea level by reducing the manifold pressure at 8% rate on the gas supply. Maximum altitude allowed for installation is
5,500 feet (1680 m).
High Altitudes (Canada Only)
The furnace is tested according to CGA 2.17 M91 for installation between 0 and 4,500 ft (0 and 1370 m) altitude. For
altitudes/elevations above 2,000 feet (610 m), ratings should be reduced at the rate of 4-percent for each 1,000 feet (305 m)
above sea level by reducing the manifold pressure at 8% rate on the gas supply. Maximum altitude allowed for installation is
5,500 feet (1680 m).
High Altitude Adjustment
Based on the altitude of the installation site, reduce the manifold pressure specified in the “Technical Data” chart and as shown
in the table below:
Manifold Pressure
Altitude
Reduction Rate
0-2,000 ft
0%
8%
16%
24%
32%
2,000-3,000 ft
3,000-4,000 ft
4,000-5,000 ft
5,000-5500 ft
9
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First Firing the Furnace
Start the furnace following the instructions given in the “Operating Instructions”. The first lighting may be difficult because of the
air trapped in the gas lines. During initial firing of the furnace, residual manufacturing grease will bake out and smoke will occur
which is not a health danger. To prevent nuisance and operation of fire alarms, ventilate the room for the first two hours of
operation.
Checking the Gas Inlet Pressure
The gas inlet pressure can be measured by connecting a test gauge to the connection provided on the gas valve. (Figure 8 - A)
Once installation is complete, the gas inlet pressure must be checked. The minimum gas inlet pressure must be as shown in
“Technical Data”. After checking the gas inlet pressure, disconnect the test gauge and firmly tighten the screw of the gauge
connection, then check for gas leaks. Correct any gas leaks before operating the furnace.
Checking the Gas Manifold Pressure
The gas manifold pressure can be measured by connecting a test gauge to the connection provided on the gas valve. (Figure 8 -
B). The furnace comes set from the factory at the correct manifold gas pressure. After the installation is completed, the gas
manifold pressure must be checked both in Hi and Lo input. Turn the control knob to switch the unit from Hi to Lo input. The
position of the knob in which this occurs depends on the actual room temperature. The gas manifold pressure must be as
shown in “Technical Data”. Differences of plus or minus 0.1 in. w.c. are acceptable. If the Hi or Lo gas manifold pressures are
different from the values given in the “Technical Data” or are more than 0.1 in. w.c., shut off the furnace and contact a qualified
service technician for correction.
For instructions about adjustment of the manifold Hi and Lo pressures, see the "Servicing” section. After checking the gas
manifold pressure, disconnect the test gauge and firmly tighten the screw of the gauge connection, then check for gas leaks
from it. Correct any gas leaks before operating the furnace.
Figure 8
B
A
C
A. Test gauge connection for gas inlet
pressure
B. Test gauge connection for gas manifold
pressure
C. Nut for Hi pressure adjustment (pressure
regulator)
D. Screw for Lo pressure adjustment (Hi-Lo
operator)
E. Electric clamp connection
F. Gas supply inlet
D
E
F
10
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Electrical Wiring Diagram
Key:
EV, EV1
EV2
M
Gas Valve 1 (Safety Shutter)
Vanne Gas 1 (Securite’)
Hi-Lo Flame Operator
Operateur Haute-Basse Flamme
Moteur du Ventilateur
Fan Motor
M1
M2
M9
RP8
RP7
S
Overheat Thermostat
Thermostat de Surchauffe
Fan Thermostat
Thermostat de Ventilation
Mains Fuse – 5x20 size – 4A
Flame Sensor
Pressostat de Circuit De Combustion
Electrode de Detection de Flamme
Electrode D’Allumage
Spark Igniter (n. 2 pcs)
Combustion Blower Motor
Flame View Lamp (green lamp)
Lock-Out Lamp (red lamp)
Current Transformer 120-24 V
Reset and Summer – Winter Switch
Hi-Lo Flame and Fan Speed Switch
Manual – Program Mode Switch
Programmable Timer
Moteur du Ventilateur de Combustion
Lampe de Presence de Flamme (Verte)
Lampe de Verrouillage (Rouge)
Transformateur 120-24 V
SF
SB
TR
Z1
Rearmement et Bouton Ete’ - Hiver
Bouton Haute-Basse Flamme – Vitesse Ventil.
Bouton Manuel – Programme’
Interrupteur Horaire
Z2
Z3
Z8
Z9
Room Thermostat
Thermostat D’Ambiance
L1
Supply Line – Live Wire
Supply Line – Neutral Wire
Supply Line – Ground Wire
Allimentation - Phase
L2
Alimentation - Neutre
GND
Alimentation - Masse
Figure 9
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Operating Instructions
Before operating the furnace, read carefully all warnings and safety information in this manual.
FOR YOUR SAFETY READ BEFORE OPERATING
WARNING: If you do not follow these instructions exactly, a fire or explosion
may result causing property damage, personal injury or loss of life.
A. This appliance does not have a pilot which must
be lighted by means of the piezo igniter installed
on the furnace. Do not try to light the pilot by
hand.
Follow the gas supplier's instructions.
- If you cannot reach your gas supplier, call the fire
department.
C. Use only your hand to push in or turn the gas control
knob. Never use tools. If the knob will not push in or
turn by hand, do not try to repair it, call a qualified
service technician. Force or attempted repair may result
in a fire or explosion.
B. BEFORE LIGHTING, smell all around the
appliance area for gas. Be sure to smell next
to the floor because some gas is heavier than
air and will settle on the floor.
WHAT TO DO IF YOU SMELL GAS:
- Do not try to light any appliance
- Do not touch any electric switch
- Do not use any phone in your building
- Immediately call your gas supplier from a
neighbor's phone.
D. 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 the lowest setting by turning it counterclockwise
completely. Do not force.
TIMER
3. Turn off all electric power to appliance.
4. This appliance is equipped with an ignition device that automatically lights the
burner. Do not try to light the burner by hand.
5. Turn off gas supply to the unit by turning off the gas shutoff valve.
6. Wait five minutes to clear out any gas. If you then smell gas, STOP! Follow
the safety information in section "B" above. If you do not smell gas, go to the
next step.
THERMOSTAT
RESET
GREEN
LAMP
7. Turn on the gas supply to the unit.
8. Turn on electric power to the appliance.
SUMMER/WINTER
9. Push the MIN/MAX button to MIN position (button down).
10. Switch the SUMMER/WINTER button to WINTER position (button up).
11. Set thermostat to desired setting.
RED
LAMP
MIN/MAX
12. The red lamp will be lit for 40 seconds, then the flame ignite. The red lamp
will then shut off and the green lamp will be lit.
13. If the appliance will not operate, follow the instructions below "To Turn Off Gas Of Appliance" and call your
service technician or gas supplier.
14. If you choose the high heat output setting, push the MIN/MAX button to MAX position (button up). If you
prefer soft heating and silent operation, keep it on MIN position (button down).
15. This appliance has an automatic flame control system. When the flame is lit, the green lamp is lit also.
In case of flame fault, the red lamp will light and the green lamp will turn off. If this occurs, set the
SUMMER/WINTER button to the SUMMER position (button down) and wait ten (10) seconds; then turn
the switch back to the WINTER position (button up). The appliance will attempt to relight after
approximately 40 seconds. During these 40 seconds the red lamp will be lit. If the second attempt is
unsuccessful, turn off the electric power to the appliance and call your Service Agency.
TO TURN OFF GAS TO APPLIANCE
1. Set the thermostat to the lowest setting by turning it counterclockwise
2. Turn off all electric power to the appliance if service is to be performed.
3. Turn the gas tap installed on the gas supply to the CLOSED position.
completely. Do not force.
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WHAT TO DO IF THE RED LAMP IS LIT
This appliance has an electronic flame supervision device. If the flame disappears the gas flow will be automatically
shut off and the red lamp will light instead of the green one. The appliance will attempt to relight if you do ONE of
the following:
A. Turn off the electric supply to the appliance for approximately 40 seconds and turn it on again; OR
B. Turn the thermostat knob to the zero setting, then turn it back to a comfortable setting after approximately 40
seconds; OR
C. Press the SUMMER/WINTER button to the SUMMER position (button down) for approximately 40 seconds and
set it back (button up) to the WINTER position.
HOW TO SHUT OFF THE APPLIANCE
1. Turn the thermostat knob to the ZERO position.
2. Turn the I-O switch on the programmable clock to the ZERO position.
3. Turn off all electric supply to the appliance.
4. Turn the gas shutoff valve installed on the gas supply line upstream to the unit to the CLOSED position.
USING THE FEATURES OF YOUR FURNACE
GREEN LAMP: It is lit when the flame is ON.
RED LAMP: In case the flame disappears, the gas flow will be shut off and the red
lamp will be lit. The furnace is locked-out. To reset the furnace, follow the instructions
above, "WHAT TO DO IF THE RED LAMP IS LIT."
MANUAL/PROGRAM BUTTON: When the button is down, the furnace keeps the
temperature set by the thermostat according to the clock's program. When the
button is up, the furnace thermostat maintains the temperature.
THERMOSTAT: Turn clockwise to increase the temperature, turn counterclockwise
to decrease it.
SUMMER/WINTER: When the button is up, the furnace will operate in heating mode
according to the thermostat and/or clock's program. When the button is down, the
appliance will provide ventilation.
MIN/MAX BUTTON: For faster heating, keep this button up. For soft heating and
silent operation, keep this button down.
HUMIDIFIER:
water filling hole
HUMIDIFIER: For better comfort this furnace is equipped with a humidifier. It is very
easy to use. Using a funnel, periodically add water to the small tank located on the
top left side of the furnace. Normally, the tank needs to be refilled after 4 - 5 days.
NOTE: The use of water low in limestone or distilled is advisable in order to prevent
any possible calcareous sedimentation that may be difficult to remove.
Anticalcareous tablets for humidifiers are commercially available. The humidifier
capacity is 11.8 fluid ounces (0.35 liters).
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Servicing
All servicing activities must be performed by a qualified service technician or a service agency. The home owner may not
service the furnace. The home owner must read this section to be informed of the periodic maintenance and checks that are
required. All servicing (except on vent system) must be performed with the external casing removed. After any servicing, the
external casing must be reinstalled properly.
Checking and Adjusting the Gas Manifold Pressure
The furnace comes set from the factory at the correct HI and LO gas manifold pressures as shown in “Technical Data”. It is
recommended to check the pressures periodically (minimum once a year). If adjustment is required, this can be done by
adjusting screws “C” and “D”. (Figure 8) A test gauge must be connected as explained in “Checking the Gas Manifold
Pressure”.
Proceed as follows:
1. Place the unit in the HI mode.
2. Adjust the HI pressure by turning screw “C” (pressure regulator) to the value given in “Technical Data”. Turn clockwise to
increase the pressure, turn counterclockwise to decrease it.
3. Turn the control knob clockwise until the gas control switches to LO mode. The position in which this occurs depends on
the actual room temperature.
4. Loosen screw “D” until the correct value for the LO pressure is achieved. Turn clockwise to decrease the pressure, turn
counterclockwise to increase it.
5. Switch the unit from LO to HI mode to check that both the HI and LO pressures are correct. A tolerance of plus or minus
0.1-inches w.c. on the pressure value is acceptable. Readjust if needed.
6. Disconnect the test gauge and firmly tighten the screw of the gauge connection, then check for gas leaks from it.
The HI and LO pressures must be adjusted as instructed above. Never adjust them independently of each other.
Checking, Removing and Reassembling of the Vent Air Intake System
It is essential that the vent air intake system is examined periodically (minimum once a year) to verify it is clean from dust and
deposits of solid materials such as leaves or nests. The vent air intake system is checked from outside. Proceed as follows:
1. Remove the vent cap by removing the three outer screws. (Figure 7)
2. Remove the inner flue pipe. Do not use tools; the pipe can be extracted by hand.
3. Remove dust and deposits from the vent cap and flue pipes. Deposits in the air pipe must be taken outside. Do not push
them inside the furnace. The outer air pipe may not be removed from outside.
4. Reinstall the flue pipe from outside. Do not use glue or sealants.
5. Reinstall the vent cap on the flue pipe. Do not use glue or sealants. Tighten the three outer screws.
Lubrication of Moving Parts
This furnace does not require lubrication. Do not try to lubricate any part of the furnace such as motors bearings, keys, knobs,
screws, etc.
Flame Visual Check
Correct and proper operation may be checked by examining the burner flame. The flame may be examined through the front
flame viewer. The flame must be stable and have blue color. Some small yellow tips are acceptable with propane gas. If the
flame is yellow or has excessive turbulence, check the gas manifold pressure and the vent air intake system. If these are not
acceptable, call a qualified service technician for a complete check of the furnace. Call also your gas supplier to check the
composition of the gas in use.
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Annual Maintenance Requirements
1. Clean fan blades.
2. Clean air blower.
3. Check and clean silicone red pipes.
4. Check air flow switch.
5. Clean and check exhaust flue pipe and air intake pipe.
Check red O-Ring Gasket
(NRNG003). If it is
damaged, replace it.
6. Check for gas leaks on all connections.
7. Check and adjust gas pressure.
Gas inlet pressure
(pipeline)
Gas manifold
pressure (burner)
Gas burner pressure
adjustment
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Programmable Timer
The programmable timer allows precise operating and timing control and is standard on this furnace. (Figure 10)
Overview
The programmable timer has the following features:
•
•
•
•
•
•
•
Long life lithium battery
Daily and weekly programs
One minute minimum switching time
Quick progression
Sixteen programs (8 on and 8 off)
Days of the week and hours of the day selection
Programmable day blocks:
1-2-3-4-5
1-2-3-4-5-6
(Monday – Friday)
(Monday – Saturday)
1-2-3-4-5-6-7 (Monday – Sunday)
6-7
(Saturday – Sunday)
Figure 10
KEY
A
On/Off Switch
Pos. I
The appliance is controlled by the room thermostat
Pos. AUTO The appliance is controlled by both the timer and the room thermostat
Pos. O
The appliance is turned off
B
Setting / Regulator Switch
Pos.
Time setting
Pos. RUN
Normal operating mode (the display shows the current time)
Pos. Ê
Setting of programming
C
D
E
F
Program Selection
Day Selection
Hours Setting
Minutes Setting
SKIP Button
G
R
Reset Button
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Setting and Adjustment
1 2 3 4 5 6 7
ꢀ
0:00
Initial Conditions
A.
Set the Setting/Regulator switch (Figure 10-B) in RUN position (center). Press the
Reset button R. The display will flash.
1 2 3 4 5 6 7
ꢀ
B.
With the Setting/Regulator switch selector in position (right), press the Reset button,
R, the display error EEE will appear. Move the Setting/Regulator switch, (Figure 10-B)
to the RUN (center) position. The display will disappear.
E EE
1 2 3 4 5 6 7
ꢀ
C.
D.
E.
If the Setting/Regulator switch, (Figure 10-B) is moved to position the display is
frozen.
0:00
1 2 3 4 5 6 7
If the Setting/Regulator switch, (Figure 10-B) is moved to RUN position the display is
frozen with the colon flashing.
ꢀ
0:00
If the Setting/Regulator switch, (Figure 10-B) is moved to position (right), the
1 2 3 4 5 6 7
display is flashing:
,1,1.
☼
ꢀ
☼
1
0:00
Manual Operation
Move the On/Off switch, (Figure 10-A) to the I position (left).
•
The symbol of a light ( ) will appear on the display. In this condition the heater is controlled by the furnace thermostat
☼
and is independent of the timer program.
Move the On/Off switch, (Figure 10-A) to the O position (right).
The symbol of the light (☼) on the display will disappear. In this condition the furnace is turned off.
•
Move the On/Off switch, (Figure 10-A) to the AUTO position (center).
•
The program function is activated. The furnace will operate according to the programs. The furnace is controlled both
by the timer and by the furnace thermostat.
1 2 3 4 5 6 7
ꢀ
Day and Time Setting
0:00
A. The Setting/Regulator switch, (Figure 10-B) is placed in the position (left).
B. To set the day of the week, press the Day Selector button, (1….7, Figure 10-D), a triangular
shaped indicator proceeds one day at a time. Number 1 stands for Monday, number 2
stands for Tuesday, etc.
1 2 3 4 5 6 7
ꢀ
15:16
C. To set the time press the Hour Selector button (h, Figure 10-E) to set the hour and the
Minutes Selector button (m, Figure 10-F) to set the minutes. The hours are set using military
time.
Example: Set
Wednesday, 15:16
hours (military time).
D. After setting the day and the time move the Setting/Regulator switch, B to the RUN position
(center). The display is frozen and the colon is flashing.
1 2 3 4 5 6 7
☼
1
Programming the Timer
0:00
Sixteen settings may be programmed on the timer. Eight odd numbers (1-3-5-7-9-11-13-15) for the
ON position and eight even numbers (2-4-6-8-10-12-14-16) for the OFF position. Program numbers
1 2 3 4 5 6 7
ꢀ
are to the left of the symbol on the display.
☼
☼
1
0:00
A. Move the Setting/Regulator switch, (Figure 10-B) to the position (right). On the right side
of the display the number 1, 1, will appear. The ON time may now be set.
☼
1 2 3 4 5 6 7
ꢀ
☼
1
B. Press the Day selection, (1…...7, Figure 10-D) button to the day or the block of days you
want the furnace to turn ON. Number 1 stands for Monday, etc. To set the desired time,
press the Hours Selection (h, Figure 10-E) button to set the hour and the Minute Selection
(m, Figure 10-F) button to set the minutes (for example 09:03). The time is set using military
time.
9:03
1 2 3 4 5 6 7
ꢀ
1
0:00
C. Press the Program Selection ( , Figure 10-C). The right side of the display will show a
number 2 without the light symbol. The OFF time may now be set.
1 2 3 4 5 6 7
ꢀ
1
17
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D. Press the Day Setting, (1……7, Figure 11-D) button to program another day or block of days.
E. To set further programs repeat steps item B through D above.
NOTE: When the same ON and OFF times are desired for different days of the week, the setting procedure may be simplified.
•
•
•
•
1-2-3-4-5
1-2-3-4-5-6
(from Monday through Friday)
(from Monday through Saturday)
1-2-3-4-5-6-7 (from Monday through Sunday)
6-7 (Saturday and Sunday)
F. To avoid undesired operation verify that the programs do not overlap one another. You can check the settings by
pressing the Program Selection button. ( , Figure 10-C)
G. Move the Setting/Regulator switch to the RUN position (center). The display will show the current day and time.
IMPORTANT: All the programs set will be activated ONLY the day after the setting has been carried out.
During operation, the ON status of the timer is shown on the display with the symbol on the right end. When the symbol
☼
☼
does not appear, the timer is OFF.
Cancelling a Single Program
To cancel a single program:
A. Move the Setting/Regulator switch (Figure 10-B) to the ( , Figure 10-C) position (right).
Press the Program Selector ( , Figure 10-C) button and select the program to be
cancelled.
1 2 3 4 5 6 7
1
0:00
B. Simultaneously press the Program Selector ( , Figure 10-C) and SKIP button (
Figure 10-G) for at least 2 seconds. The selected program will be cancelled.
C. Verification that program has been cancelled is the continual blinking of 0:00.
Cancelling of all Preset Programs
To cancel all the preset programs, press the Reset button, R, for at least 2 seconds. All the preset programs will be cancelled.
Using the Skip Function
To skip a program:
1 2 3 4 5 6 7
ꢀ
A. Move the Setting/Regulator switch in the RUN position (center).
☼
1
B. Press the SKIP button (
Figure 10-G). The next program will be activated as
15:16
X
programmed. The SKIP symbol (
Figure 10-G) is shown on display.
C. The SKIP command may be stopped, by pressing the SKIP button. (
Figure 10-G)
1 2 3 4 5 6 7
ꢀ
The preset program will restart and SKIP symbol (
the display.
Figure 10-G) will disappear from
15:16
Skip Function Procedure During Operation
A. The SKIP function can be activated only in RUN mode.
B. The SKIP function starts immediately after the pressing the SKIP button, and disappears when next program starts.
C. The SKIP function can be stopped manually by pressing the SKIP button and the preset program will be activated.
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Troubleshooting
Starting Sequence (Electrical)
Step 1
1. Check L1 – L2 (Supply 120 V, 60 Hz)
2. Check M9 (Main fuse)
Troubleshooting Step 1
Point 1 (L1-L2)
No voltage (120 V).
Check the electrical supply line, wiring and
connections.
Point 2 (M9)
Fuse damaged.
Check the electrical supply line and replace the
fuse.
Summer Mode
Step 2
3. Check Z1 (Reset summer/winter switch). Button
down – summer mode.
4. Check Z2 (Hi-Lo flame and fan speed switch)
Button down - Minimum velocity
Button up – Maximum velocity
Troubleshooting Step 2
Point 3 (Z1)
Z1 is down (closed) but there is no voltage on the fan
motor M.
Check wiring and connections. If everything is okay,
replace the switch.
Point 4 (Z2)
Z2 is down but the fan motor runs at the maximum
velocity (120 V)
Z2 is up but the fan motor runs at the minimum
velocity (lower than 120 V)
Check wiring and connections. If they are okay,
replace the switch.
Winter Mode
Step 3
5. Check Z1 (Reset summer/winter
switch).
Button up – winter mode.
6. Check Z3 (Manual-program mode
switch).
Button up – manual mode.
Button down – automatic mode.
7. Check M2 (Fan thermostat).
The thermostat is closed only when its
temperature is higher than 104 °F.
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Troubleshooting Step 3
Point 5 (Z1)
Z1 is open and no ignition.
Check wiring and connections. If everything
is okay, replace the switch.
Point 7 (M2)
M2 is closed and fan thermostat
temperature is lower than 104 °F.
Check wiring and connections. If they are
okay, replace the thermostat.
Step 4
8. Check Z9 (Room thermostat). Close the
thermostat with a clockwise rotation.
9. Check M1 (Overheat thermostat, automatic
reset). The thermostat is closed at a
temperature lower than 140 °F.
10. Check S (Combustion blower motor).
Troubleshooting Step 4
Point 8 (Z9)
After a clockwise rotation, the contact is still
open. Check wiring and connections. If they are
okay, and the room temperature is cold, replace
the switch.
Point 9 (M1)
M1 is open and fan thermostat temperature is
lower than 140 °F. Check wiring, connections,
gas pressure and fan motor. Clean fan blades
and air grids. If everything is okay, replace the
thermostat.
Point 10 (S)
S motor does not run. Check voltage, wiring and
connections.
If everything is OK, replace the motor.
Step 5
11. Check NP (Pressure switch).
12. Check electrical supply to flame control box
(120 V).
13. Check TR (electrical transformer).
(120V/24V)
14. Check EV1 (Min gas valve, 24V).
15. Check RP7 (ignitions electrode)
16. Check RP8 (flame sensor)
17. Check EV2 (Max gas valve, 24 V).
24 V
120 V
Troubleshooting Step 5
Point 11 (NP)
NP contact is open and air blower ON.
Check wiring and connections. Check and clean
blower pipes.
Check and clean burner and flue gas pipe.
Clean blower.
If everything is okay, replace the switch.
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Point 13 (TR)
No inlet voltage (120 V).
Check 5 pole connector and control box.
If everything is okay, first replace the connector
and then the control box if problem remains.
No outlet voltage (24 V) during ignition.
Check wiring and connections.
If everything is okay, replace the transformer.
Point 14 (EV1)
Valve closed during ignition.
Check wiring, connections and voltage.
If everything is okay, replace the gas valve.
Point 15 (RP7)
No spark during ignition.
Check electrode, wiring and connections.
If everything is okay, replace the flame control box.
Point 16 (RP8)
No flame sensing.
Check flame sensor, wiring and connections.
…Check gas pressure and exhaust flue pipe.
If everything is okay, replace the flame control box.
Point 17 (EV2)
No voltage on EV2 with switch Z2 up.
Check wiring and connections.
If everything is okay, replace the switch.
Valve closed with voltage with Z2 up.
Check wiring, connections and voltage.
If everything is okay, replace the gas valve.
Starting Sequence (Gas)
1.
2.
3.
4.
5.
6.
7.
8.
Check and clean exhaust flue pipes;
Check and clean air blower and fan motor;
Check and clean burner and combustion chamber;
Check and clean gas nozzle;
Check gas type;
Check supply gas line pressure (see the manual);
Check gas losses;
Set burner gas pressure (see the manual).
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Replacement Parts
TR – 120/24V Transformer
Part Number: JTRS017
Part Number: JCNT019
Ignition Control Box
NP – Pressure Switch
Z9 – Room Thermostat
Part Number: JPRS010
Part Number: JTLT005
Z1 – Reset and Summer/Winter
Switch
Part Number: NTST000
Part Number: N19800202
Z8-Z3 – Timer and Manual-
Program Mode Switch
Z2- Hi-Lo Flame and Fan Speed
Switch
Part Number: N19800201
Electric Box
Part Number:
ELMP006 – ELMP007
SF/SB – Green and Red Lamps
Part Number:
E-PRG005
Z8 - Timer
Gas Assembly
Gas Burner and Gas Nozzle
Part Number: JPRT010
Natural Gas Nozzle
LP Gas Nozzle
Part Number: JGLL065
Part Number: JGLL067
EV1/2 – Min/Max Gas Valve
Part Number: GVLV022
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RP8 : Flame
Sensor
Part Number:JLTT015
RP7: Spark Igniter
(2 pieces)
Part Number: JLTT023
S – Combustion Blower Motor
Part Number: JMTR017
M1 – Overheat Thermostat
M2 - Fan Thermostat
Part Number: JTLT006
Part Number:J12301018
Fan Blades
(4 pieces)
Part Number:
VVNT003-VVNT002
M - Fan Motor
(2 Pieces)
Part Number:
JMTR018
Williams Furnace Co., 250 West Laurel Street, Colton, CA 92324 U.S.A.
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