WILLIAMS 1773512 High Efficiency Direct Vent Wall Furnace Owner’s Manual

: September 11, 2024
: williams

WILLIAMS 1773512 High Efficiency Direct Vent Wall Furnace

Product Information

Specifications

Model Number (Natural Gas): 1773512
Model Number (Propane Gas): 1773511
BTU/hr: 17,700

Product Usage Instructions

Installation

Carefully read the owner’s manual before installing the Williams Wall Furnace.
Ensure that the installation is done by a qualified installer or service agency.
Record the model number, serial number, installation date, and other required information in the provided installation record.
Seal any unused openings in the venting system to prevent carbon monoxide poisoning.

Safety Warnings

Do not store flammable vapors near the appliance.
Follow all instructions in the manual to prevent fire or explosion.
For any assistance or additional information, consult a qualified installer or service agency.

Operation

Inspect the venting system for proper size and pitch before operating the appliance.
Ensure there are no blockages, leakages, or deficiencies in the venting system that could lead to unsafe conditions.
Close doors and windows in the area where the appliance is located during operation.
Follow the lighting instructions provided in the manual to start the appliance.
Adjust the thermostat to set the desired operating temperature.

FAQ

Q: Can this furnace be installed in trailers or recreational vehicles?
A: No, this furnace is not suitable for installation in trailers or recreational vehicles.
Q: What should I do if I detect spillage from draft hood equipped appliances?
A: If you detect spillage, immediately turn off the appliance and contact a qualified installer or service agency for inspection and necessary repairs.

OWNER’S MANUAL
INSTALLATION INSTRUCTIONS

VISITE NUESTRA https://www.williamscomfort.com/products/furnaces/

HIGH EFFICIENCY DIRECT VENT WALL FURNACE

MODEL NUMBER (natural gas)
1773512
MODEL NUMBER (propane gas)
1773511
SAVE THIS MANUAL FOR FUTURE REFERENCE.
READ THIS OWNER’S MANUAL CAREFULLY BEFORE YOU INSTALL YOUR NEW WILLIAMS WALL FURNACE.

WARNING : This Direct Vent Wall Furnace is approved for aftermarket manufactured home installations (once the manufactured home is sold, installed and stationary) unless prohibited by local codes. Not for manufactured home manufacturer (factory) installation. Do not install this furnaces (natural or propane gas) in trailers or recreational vehicles.

WARNING: This product can expose you to chemicals including epichlorohydrin which is known to the State of California to cause cancer and birth defects and/or other reproductive harm. For information go to www.p65warnings.ca.gov

WARNING : Improper installation, adjustment, alteration, service or maintenance can cause injury or property damage. Refer to this manual. For assistance or for additional information consult a qualiﬁed installer or, service agency.

WARNING: If the information in these instructions 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 or cell phone in your building.
Extinguish any open ﬂame.
Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.
If you cannot reach the gas supplier, call the ﬁre department.
Installation and service must be performed by a qualiﬁed installer, service agency or the gas supplier.

250 West Laurel Street, Colton CA 92324

INSTALLATION RECORD

Model No. Serial No.
Original Purchaser
Address
City and State Zip
Dealer
Address
City and State Zip
Insallation Date Name Signature

(Dealer or authorized representative who certifies that this appliance is installed in accordance with Manufacturer’s instructions and local codes.)

ANY WARRANTY CONSIDERATIONS ARE CONTINGENT ON INSTALLATION BY A QUALIFIED INSTALLER (CONTRACTOR). SELF-INSTALLATION IS PROHIBITED AND WILL INVALIDATE YOUR WARRANTY.

WARNING: CARBON MONOXIDE POISONING HAZARD

Failure to follow the steps outlined below for each appliance connected to the venting system being placed into operation could result in carbon monoxide poisoning or death.

The following steps shall be followed for each appliance connected to the venting system being placed into operation, while all other appliances connected to the venting system are not in operation:

Seal any unused openings in the venting system.
Inspect the venting system for proper size and horizontal pitch, as required in the National Fuel Gas Code, ANSI Z223.1/NFPA 54 or the Natural Gas and Propane Installation Code, CSA B149.1 and these instructions. Determine that there is no blockage or restriction, leakage, corrosion and other deﬁciencies which could cause an unsafe condition.
As far as practical, close all building doors and windows and all doors between the space in which the appliance(s) connected to the venting system are located and other spaces of the building.
Close ﬁreplace dampers.
Turn on clothes dryers and any appliance not connected to the venting system. Turn on
any exhaust fans, such as range hoods and bathroom exhausts, so they are operating at maximum speed. Do not operate a summer exhaust fan.
Follow the lighting instructions. Place the appliance being inspected into operation. Adjust the thermostat so appliance is operating continuously.
Test for spillage from draft hood equipped appliances at the draft hood relief opening after 5 minutes
of main burner operation. Use the ﬂame of a match or candle.
If improper venting is observed during any of the above tests, the venting system must be corrected in accordance with the National Fuel Gas Code, ANSI Z223.1/NFPA 54 and/or Natural Gas and Propane Installation Code, CSA B149.1.
After it has been determined that each appliance connected to the venting system properly vents when tested as outlined above, return doors, windows, exhaust fans, ﬁreplace dampers and any other
gas-ﬁred burning appliance to their previous conditions of use.

Quick reference, here’s how to:

INSTALLING YOUR
FURNACE Furnace locations

OPERATING INSTRUCTIONS
Igniting your furnace for the ﬁrst time.

SERVICING YOUR HEATER
Learn how to keep your new Williams Furnace operating.

INSTALLATIONS IN THE STATE OF MASSACHUSETTS

All installations in the State of Massachusetts must use the following requirements when installing, maintaining or operating direct-vent propane or natural gas-ﬁred space heaters.
For direct-vent appliances, mechanical-vent heating appliances or domestic hot water equipment, where the bottom of the vent terminal and the air intake is installed below four feet above grade the following requirements must be satisﬁed:

If there is not one already present, on each ﬂoor level where there are bedroom(s), a carbon monoxide detector and alarm shall be placed in the living area outside the bedroom(s). The carbon monoxide detector shall comply with NFPA 720 (2005 Edition).
A carbon monoxide detector shall be located in the room that houses the appliance or equipment
and shall:
- Be powered by the same electrical circuit as the appliance or equipment such that only one service switch services both the appliance and the carbon monoxide detector.
- Have battery back-up power;
- Meet ANSI/UL 2034 Standards and comply with NFPA 720 (2005 Edition); and
- Have been approved and listed by a Nationally Recognized Testing Laboratory as recognized under 527 CMR.
  A CARBON MONOXIDE DETECTOR SHALL:
- Be located in the room that houses the appliance or equipment;
- Be either hard-wired or battery powered or both; and
- Shall comply with NFPA 720 (2005 Edition).
A product-approved vent terminal must be used, and if applicable, a product-approved air intake must be used. Installation shall be in strict compliance with the manufacturer’s instructions. A copy of the installation instructions shall remain with the appliance or equipment at the completion of the installation.
A metal or plastic identiﬁcation plate shall be mounted at the exterior of the building, four feet directly above the location of vent terminal. The plate shall be of sufﬁcient size to be easily read from a distance of eight feet away, and read “Gas Vent Directly Below”.

GENERAL INFORMATION AND TECHNICAL DATA

This furnace is design certiﬁed to ANSI Z21.86-2004 / CSA 2.32-2004 Gas–Fired Gravity and Fan-Type, Direct-Vent Wall Furnaces as a Fan-Type Direct-Vent Wall Furnace
to be installed on an outside wall according to these instructions.
Any alteration of the original design, installed other than as shown in these instructions or used with a type of gas not shown on the rating plate is not permitted.

Instructions to Installer
Installation and repair should be done by a QUALIFIED SERVICE TECHNICIAN.
The installation must conform to local codes or in the absence of local codes; the installation must conform to the National Fuel Gas Code ANSI Z223.1/NFPA 54, natural gas and propane gas Installation Code CSA B149.1.
Mobile (Manufactured) home installations must conform with the “Manufactured Home Construction and Safety Standard Title 24 CFR, Part 3280” or, when such a standard is not applicable, the Standard for Manufactured Home Installations, ANSI A 225.1 NFPA/501A, Mobile Home Standard, CAN/CSA Z240 MH Series, in Canada. Installer must leave instruction manual with home owner after installation. Installer must show home owner how to start and operate furnace and thermostat. Installer must provide a 1/8-inch NPT plugged tapping for test gauge connection immediately upstream of the gas supply connection of the furnace.

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.\

WARNING: Any change to this furnace or its controls can be dangerous. This is a heating appliance and any panel, door or guard removed for servicing this furnace must be replaced prior to operating the furnace.

Safety Rules and General Warnings

DO NOT OPERATE THIS FURNACE WITHOUT FRONT PANEL INSTALLED

Due to high temperatures, the furnace should be located out of trafﬁc and away from furniture and draperies.
Children and adults should be alerted to the hazards of high surface temperatures and should stay away to avoid burns or clothing ignition.
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.
Any safety screen or guard removed for servicing a furnace must be replaced prior to operating the furnace.
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.
More frequent cleaning may be required due to excessive lint from carpeting, bedding materials, etc. It is imperative that control compartments, burners and circulating air passageways of the furnace be kept clean.
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.
DO examine venting system periodically and replace damaged parts.
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.

Safety Information for Users of Propane Gas

Propane gas is a ﬂammable gas which can cause ﬁres and explosions. In its natural state, propane is odorless and colourless. 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.

Propane Gas Warning Odor
If a gas leak happens, you should be able to smell the gas because of the odorant put in the propane 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.
propane 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 neighbour’s phone and call a trained propane 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 re-enter the building, vehicle, trailer or area.
Have the service technician or ﬁre department air out the area before you return. Properly trained LP Gas service technician must repair the leak, check and relight the gas furnace for you.

Some Points to Remember

Learn to recognize the odor of propane gas. Your local propane 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 propane gas has a weak or abnormal odor, call your propane gas Dealer.
If you are not qualiﬁed, do not light pilot lights, perform service, or make adjustments to furnaces on the propane gas system. If you are qualiﬁed, consciously think about the odor of propane 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 propane 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 propane 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 propane gas dealer. A periodic sniff test of the propane gas is a good safety measure under any condition.
If, at any time, you do not smell the propane gas odorant, and you should, assume you have a leak. Then take the same immediate action recommended above for the occasion when you do smell the odorized propane gas.
If you experience a complete ”gas out” (the container is under no vapour 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 vapour pressure by turning it off at the container before it goes completely empty or having it reﬁlled before it is completely empty.

TECHNICAL DATA

OUTPUT HEATING CAPACITY

| kW| 3.96
BTU/hr.| 13,500

INPUT RATING

| kW| 5.19
BTU/hr.| 17,700

MINIMUM INPUT RATING

| kW| 3.84
BTU/hr.| 13,100
THERMAL EFFICENCY| %| 76.27

LENGTH

| mm| 553
in| 21-3/4

HEIGHT

| mm| 715
in| 28-1/8

DEPTH

| mm| 208
in| 8-1/4

WEIGHT (OPERATING / SHIPPED)

| kg| 26
lbs.| 57
GAS CONNECTION| NPT| 3/8

FEMALE

WALL HOLE DIAMETER

| mm| 50
in| 2

AIR INLET DIAMETER

| mm| 49
in| 1-7/8

EXHAUST PIPE DIAMETER

| mm| 35
in| 1-3/8

MAX WALL THICKNESS

| mm| 150
in| 5-7/8

MIN WALL THICKNESS

| mm| 500
in| 19-5/8

INSTALLING YOUR FURNACE

TECHNICAL DATA (CONTINUTED)

MANIFOLD PRESSURE

|

MAX

|

NATURAL GAS

| mbar| 7.7
in W.C.| 3.1

PROPANE GAS

| mbar| 26.4
in W.C.| 10.6

MIN

|

NATURAL GAS

| mbar| 4.6
in W.C.| 1.8

PROPANE GAS

| mbar| 16.3
in W.C.| 6.6

GAS RATE

|

MAX

|

NATURAL GAS

| m3/h| 0.5
ft3/h| 17.8

PROPANE GAS

| m3/h| 0.2
ft3/h| 6.9

MIN

|

NATURAL GAS

| m3/h| 0.4
ft3/h| 13.3

PROPANE GAS

| m3/h| 0.1
ft3/h| 5.3

MINIMUM INLET PRESSURE

|

NATURAL GAS

| mbar| 17.4
in W.C.| 7.0

PROPANE GAS

| mbar| 27.4
in W.C.| 11.0

AIR FLOW

| m3/h| 220
cfm| 129

MINIMUM AIR FLOW

| m3/h| 160
cfm| 94
TOTAL ELECTRICAL LOAD| W| 86

Wall Installation

Installation should be done by a QUALIFIED SERVICE TECHNICIAN.
The furnace must be located on an outside wall.
Minimum clearances from combustible materrials:

Unit to the top surface of carpeting, tile: 2-inches (50 mm)
Unit to back wall (0″ to spacers): 1/4-inch (6.3 mm).
Vent to wall enclosure: 1-inch (25.4 mm)
Unit to sidewalls: 2-inches (50 mm)
Unit to ceiling: 10-inches (254 mm)

See Figure 1 showing clearance for installation of vent cap. 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 4-inches
(100 mm) is recommended between the furnace and the non-combustible shelf above it. Gas equipment 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 shall 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.

WARNING: The nearest point of the vent cap should be a minimum horizontal distant 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.

DO NOT COVER THE FURNACE.
Make sure that the correct gas supply is available. Conversion to another gas type must be performed by a qualiﬁed service technician. If the type of gas does not correspond to the type to be used (natural or propane gas), it must be converted to the correct type of gas. It is necessary to do the following two operations:

Remove and change the pilot oriﬁce with the correct gas type as shown below.
Remove and change the burner oriﬁce with the correct gas type as shown below.
Remove and change the gas valve with the correct gas type as shown below.

WARNING: For the installation of this furnace, the following items must be used as a vent air intake system:

External Plate Part Number:WFL–STF088
External Vent Cap Part Number: WFR–12426530
Flanged Air Inlet Tube Part Number: WFR–12476500
Air Tube Gasket Part Number: WFC–12900128
Flue Outlet Tube Part Number: WFR–12476510

(All the above items are supplied with the furnace) The diameter of the hole in the wall must exceed at least 2-inches (50 mm) the diameter of the air inlet tube.

GAS TYPE

|

ORIFICE PART NUMBERS

|

GAS VALVE

---|---|---

NATURAL

| BURNER ORIFICE: JGLL051 PILOT ORFICE: JGLL064|

JVL V023

PROPANE

| BURNER ORIFICE: JGLL070 PILOT ORFICE: J12160880|

JVL V024

A. Clearance above grade, veranda, porch, deck or balcony 12-inches (30 cm) minimum. (3) see notes below
B. Clearance to window or door that may be opened 12-inches (30 cm) minimum. (3) see notes below
C. Clearance to permanently closed window (minimum 12-inches (30 cm) recommended to prevent condensation on window.
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.
E. Clearance to unventilated soffit 12-inches (30 cm) minimum clearance to vinyl soffit 36-inches (90 cm) minimum.
F. Clearance to outside corner 12-inches (30 cm) minimum.
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 centreline of the regulator. (3) see notes below
I. Clearance to service regulator vent outlet 6 feet (1.8 m) minimum. (3) see notes below
J. Clearance to nonmechanical air supply inlet to building or the combustion air inlet to any other furnace 12-inches (30 cm) minimum. (3) see notes below
K. Clearance to a mechanical air supply inlet 6 feet (1.8 m) minimum. (3) see notes below
L. Clearance (1) above paved sidewalk or a paved driveway located on public property 7 feet (2.1 m) minimum. (3)
M. Clearance under veranda, porch, deck or balcony 12-inches (30 cm) minimum. (2), (3) see notes below

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.
Only permitted if veranda, porch, deck or balcony is fully open on a minimum of two sides beneath the ﬂoor.
As speciﬁed in CGA B149 installation codes (1991).
NOTE: Local codes or regulations may require different clearances.

Outside Location for Vent Terminal
Upon delivery, check to make sure the packaging has not been damaged.

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.
After marking where the appropriate holes will be, using the above mentioned template, make a 2-inch (50.8 mm) diameter hole.
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) Flue outlet tube length = wall thickness + 1-5/16-inches (7.9 mm)
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.
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
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.
Loosen the screws, remove the casing and disconnect the case grounding wire. Figure 4
Place the adhesive spongy lining behind the unit. Figure 4
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.
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.
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.
Remove the vent cap and drill all the necessary holes (diameter ¼ inch for the screw fittings provided with the furnace).
Relocate the vent cap and attach it with the screws. Figure 7
Attach the female end of the three-prong cord to the receptacle located near the bottom of the furnace.
Connect the gas supply line. A gas shutoff valve before the furnace must be installed.
Reconnect the grounding wire to the casing, attach the casing and tighten the screws.
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.

INSTALLING YOUR FURNACE

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 propane gas), it must be converted.
It will be necessary to do the following:

Change nozzle.
- Remove the screw indicated to the right.
Remove the nozzle assembly from the burner inserting the screwdriver as indicated by the arrow.
Remove the nozzle from the support and replace it with the correct one. Reassemble the nozzle assembly and the screw indicated at point 1. Set the burner pressure as indicated in the table below:

GAS TYPE

| MIN. INLET LINE GAS PRESSURE| MAX. MANIFOLD GAS PRESSURE| MIN. MANIFOLD GAS PRESSURE
---|---|---|---

NATURAL

|

7.0 inches w.c.

|

3.2 inches w.c.

|

1.8 inches w.c.

PROPANE

|

11.0 inches w.c.

|

10.6 inches w.c.

|

6.5 inches w.c.

GAS TYPE

|

NOZZLE PART NUMBERS

|

NOZZLE DIAMETER

---|---|---

NATURAL

|

P332551

|

0.09 in.

PROPANE

|

P332552

|

0.05 in.

Check the gas pressure and settings.
MINIMUM BURNER PRESSURE SETTING
- a. Set LOW burner capacity by pressing button Z2
- b. Connect a micro manometer to the test gauge B Figure 8
- c. Rotate the internal screw “D” Figure 8 and set the pressure at the correct value

MAXIMUM BURNER PRESSURE SETTING:

a. Set HI burner capacity by pressing button Z2
b. Connect a micro manometer to the test gauge B Figure 8
c. Rotate the external screw “C” Figure 8 and set the pressure at the correct value

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 propane gas lines please consult propane 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 propane 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

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
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).
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:

ALTITUDE

| MANIFOLD PRESSURE REDUCTION RATE
---|---

0-2,000 FT.

|

0%

2,000 – 3,000 FT.

|

8%

3,000 – 4,000 FT.

|

16%

4,000 – 5,000 FT.

|

24%

5,000 -5,500 FT.

|

32%

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

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

ELECTRICAL WIRING DIAGRAM

Ventil.

OPERATING INSTRUCTIONS

Before operating the furnace, read carefully all warnings and safety information in this manual. Make sure the attached lighting instructions tag hangs outside the unit after lighting the pilot.

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.

This appliance does not have a pilot which must be lighted by means of the piezo igniter installed on the furnace.
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.

Follow the gas supplier’s instructions.

If you cannot reach your gas supplier, call the fire department.
C. 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.
Make sure the attached Lighting Instruction Tag hangs outside the heating unit after pilot has been lit.

OPERATING INSTRUCTIONS

STOP! Read the safety information above on this label.
Set the thermostat to the lowest setting by turning it counterclockwise completely. Do not force.
Turn off all electric power to appliance.
This appliance is equipped with an ignition device that automatically lights the burner. Do not try to light the burner by hand.
Turn off gas supply to the unit by turning off the gas shutoff valve.
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.
Turn on the gas supply to the unit.
Turn on electric power to the appliance.
Push the MIN/MAX button to MIN position (button down).
Switch the SUMMER/WINTER button to WINTER position (button up).
Set thermostat to desired setting.
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.
If the appliance will not operate, follow the instructions below “To Turn Off Gas Of Appliance” and call your service technician or gas supplier.
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).
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

Set the thermostat to the lowest setting by turning it counterclockwise
Turn off all electric power to the appliance if service is to be performed.
Turn the gas tap installed on the gas supply to the CLOSED position.

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:

Tumoff the electric supply to the appliance for approximately 40 seconds and turn it on again; OR
Tum the thermostat knob to the zero setting, then turn it back to a comfortable setting after approximately 40 seconds; OR
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

Turn the thermostat knob to the ZERO position.
Turn the I-O switch on the programmable clock to the ZERO position.
Turn off all electric supply to the appliance.
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 UT.”

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: Tum 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.
THERMOSTAT: Tum 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.

SERVICING YOUR HEATER

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

Place the unit in the HI mode.
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.
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.
Loosen screw “D” until the correct value for the LO pressure is achieved. Turn clockwise to decrease the pressure, turn counterclockwise to increase it.
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 a cceptable. Readjust if needed.
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:

Remove the vent cap by removing the three outer screws. Figure 7
Remove the inner ﬂue pipe. Do not use tools; the pipe can be extracted by hand.
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.
Reinstall the ﬂue pipe from outside. Do not use glue or sealants.
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 colour. 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.

ANNUAL MAINTENANCE REQUIREMENTS

Clean fan blades.
Clean air blower.
Check and clean silicone red pipes.
Check air ﬂow switch.
Clean and check exhaust ﬂue pipe and air intake pipe. Check red O-Ring Gasket (P332612). If it is damaged, replace it
Check for gas leaks on all connections.
Check and adjust gas pressure.

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	Monday – Friday
1-2-3-4-5-6	Monday – Saturday
1-2-3-4-5-6-7	Monday – Sunday
6-7	Saturday – Sunday

PROGRAMMABLE TIMER 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

PROGRAMMABLE TIMER

Setting and Adjustment

INITIAL CONDITIONS

A. Set the Setting/Regulator switch Figure 10-B in RUN position (centre). Press the Reset button R. The display will flash.
B. With the Setting/Regulator switch selector in P position (right), press the Reset button, R, the display error EEE will appear. Move the Setting/Regulator switc Fh, igure 10-B to the RUN (centre) position. The display will disappear.
C. If the Setting/Regulator switch, Figure 10-B is moved t o position the display is frozen.
D. If the Setting/Regulator switch, Figure 10-B is moved to RUN position the display is frozen with the colon flashing.
E. If the Setting/Regulator switch, Figure 10-B is moved to P position (right), the display is ﬂashing:

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 (centre).

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

DAY AND TIME SETTING

The Setting/Regulator switch, Figure 10-B is placed in th e position (left).
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.
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.
After setting the day and the time move the Setting/Regulator switch, B to the RUN position (centre). The display is frozen and the colon is flashing.

PROGRAMMING THE TIMER
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 are to the left of the ☼ symbol on the display.

Move the Setting/Regulator switch, Figure 10-B to the P position (right). On the right side of the display the number 1, 1, ☼will appear. The ON time may now be set.
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.
Press the Program Selection P 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.
Press the Day Setting, 1……7, Figure 11-D button to program another day or block of days.
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 (from Monday through Friday)
1-2-3-4-5-6 (from Monday through Saturday)
1-2-3-4-5-6-7 (from Monday through Sunday)
6-7 (Saturday and Sunday)
1-2-3-4-5 (from Monday through Friday)
1-2-3-4-5-6 (from Monday through Saturday)
1-2-3-4-5-6-7 (from Monday through Sunday)
6-7 (Saturday and Sunday)
To avoid undesired operation verify that the programs do not overlap one another. You can check the settings by pressing the Program Selection button. P Figure 10-C
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:

Move the Setting/Regulator switch Figure 10-B to the P Figure 10-C position (right). Press the Program Selector P Figure 10-C button and select the program to be cancelled.
Simultaneously press the Program Selector P Figure 10-C and SKIP button X Figure 10-G for at least 2 seconds. The selected program will be cancelled.
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:

Move the Setting/Regulator switch in the RUN position (center).
Press the SKIP button X Figure 10-G. The next program will be activated as programmed. The SKIP symbol X Figure 10-G is shown on display.
The SKIP command may be stopped, by pressing the SKIP button. X Figure 10-G The preset program will restart and SKIP symbol X Figure 10-G will disappear from the display.

SKIP FUNCTION PROCEDURE DURING OPERATION

The SKIP function can be activated only in RUN mode.
The SKIP function starts immediately after the pressing the SKIP button, and disappears when next program starts.
The SKIP function can be stopped manually by pressing the SKIP button and the preset program will be activated

TROUBLESHOOTING

STARTING SEQUENCE °ELECTRICAL˛ STEP 1

Check L1 – L2 (Supply 120 V, 60 Hz)
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
Check Z1 (Reset summer/winter switch). Button down – summer mode.
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
Check Z1 (Reset summer/winter switch).
Button up – winter mode.
Check Z3 (Manual-program mode switch).
Button up – manual mode.
Button down – automatic mode.
Check M2 (Fan thermostat).
The thermostat is closed only when its temperature is higher than 104 °F.
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
Check Z9 (Room thermostat). Close the thermostat with a clockwise rotation.
Check M1 (Overheat thermostat, automatic reset). The thermostat is closed at a temperature lower than 140 °F.
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
Check NP (Pressure switch).
Check electrical supply to flame control box (120 V).
Check TR (electrical transformer). (120V/24V)
Check EV1 (Min gas valve, 24V).
Check RP7 (ignitions electrode)
Check RP8 (flame sensor)
Check EV2 (Max gas valve, 24 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.

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˛

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).

FURNACE ACCESSORY REPLACEMENT PARTS FOR 177 MODELS

MODEL NUMBERS

1773512| 1773511

REF. NO.

|

REPLACEMENT PART DESCRIPTION

|

PART NUMBER

---|---|---
1| TR 120/24 Transformer| P332523
2| Ignition Control Box| P332503
3| NP Pressure Switch| P332516
4| Z9 Room Thermostat| P332564
5| Z1 Reset and summer/Winter Switch| P332571
6| Z8 – Z3 Timer and Manual Program Mode Switch| P332570
7| Z2 Hi-Lo Flame and Fan Speed Switch| P332569
8| SF/SB Green and Red Lamps| P332633
9| Z8 Timer| P332539
10| Gas Burner and Gas Nozzle| P332561
11| Natural Gas Nozzle| P332551
12| Propane Gas Nozzle| P332552
13| EV 1/2 Min/Max Gas Valve| P332541
14| RP8 Flame Sensor| P332511
15| RP7 Spark Igniter (1 piece) (requires 2)| P332512
16| S – Combustion Blower Motor| P332514
17| M1 – Overheat Thermostat| P332522
18| M2 – Fan Thermostat| P332496
19| Fan Blades| P332572
20| M – Fan Motor| P332513