INSTALLATION INSTRUCTIONS FORHORIZONTAL GAS FURNACE

WARNING:Improper installation, adjustment,alteration, service or maintenancecan cause injury or property damage.Refer to this manual. For assistanceor additional information consult aqualified installer, service agency orthe gas supplier.

FOR YOUR SAFETY

Do not store or use gasoline orother flammable vapors and liquidsin the vicinity of this or any otherappliance.

FOR YOUR SAFETYWHAT TO DO IF YOU SMELL GAS*Do not try to light any appliance.*Do not touch any electrical switch;do not use any phone in yourbuilding.

.Immediately call your gas supplierfrom a neighbor’s phone. Followthe gas supplier’s instructions.

@If you cannot reach your gas sup-plier, call the fire department.

92-21288-06-04

DRAFTHOOD ASSEMBLY1.

2.3.

4.5.

Assemble drafthood sides over the drafthood wrap andattach with screws provided. See Figure 4.Attach baffle assembly to drafthood wrap.Place rear flange of drafthood behind support clip onfurnace and slide drafthood down until the flange seats.See Detail “A”. Attaching holes in drafthood sides mustalign with holes in furnace.Attach drafthood to furnace with screws provided.Mount vent safety switch on end of drafthood nearestcontrols.

DETAIL “A”

d%~~~~OOD

FIGURE 4 ‘IDE

DUCT WORKAttach the supply and return duct work to the flangedopenings provided on either end of the furnace. Non-combustible flexible duct connectors are recommended toconnect both the supply and return ducts to the furnace.CAUTION: Air openings in the casing front, return airgrilles and warm air registers must not be obstructed.

When the furnace is installed so that the supply ductscarry air circulated by the furnace to areas outside thespace containing the furnace, the return air shall behandled by a duct or ducts sealed to the furnace casingand terminated outside the space containing the furnace.

WARNING: IF THERE IS NO COMPLETE RETURN AIRDUCT SYSTEM, THE RETURN AIR CONNECTION MUSTBE SEALED TO THE FURNACE CASING AND RUN FULLSIZE TO A LOCATION OUTSIDE THE UTILITY ROOM ORSPACE HOUSING THE FURNACE TO PREVENT ANEGATIVE PRESSURE ON THE VENTING SYSTEMS.

CONSULT LOCAL CODES FOR SPECIAL REQUIREMENT.Blower speed should be adjusted to maintain the air riserange shown on the rating plate.

CIRCULATING AIR SUPPLYWARNING: NEVER ALLOW THE PRODUCTS OF COMBUS-TION OR THE FLUE PRODUCTS TO ENTER THE RETURNAIR DUCTWORK, OR THE CIRCULATING AIR SUPPLY.ALL RETURN DUCTWORK MUST BE ADEQUATELYSEALED AND SECURED TO THE FURNACE WITH SHEETMETAL SCREWS, AND JOINTS TAPED. ALL OTHER DUCTJOINTS MUST BE SECURED WITH APPROVED CONNEC-TIONS AND SEALED AIRTIGHT.

FAILURE TO PREVENT PRODUCTS OF COMBUSTIONFROM BEING CIRCULATED INTO THE LIVING SPACECAN CREATE POTENTIALLY HAZARDOUS CONDITIONS,INCLUDING CARBON MONOXIDE POISONING THATCOULD RESULT IN PERSONAL INJURY OR DEATH.

DO NOT, UNDER ANY CIRCUMSTANCES, CONNECTRETURN OR SUPPLY DUCTWORK TO OR FROM ANYOTHER HEAT PRODUCING DEVICE SUCH AS AFIREPLACE INSERT, STOVE, ETC. DOING SO MAYRESULT IN FIRE, CARBON MONOXIDE POISONING, EX-PLOSION, PERSONAL INJURY OR PROPERTY DAMAGE.

The circulating air supply may be taken either (1) from out-side the building, (2) from return air ducts from severalrooms (100% return air) or (3) any combination of the two.When outside air is utilized, the system should bedesignedand adjusted such that the temperature of the supply air tothe furnace will not be below 50°F during the heatingseason. When using a combination of outside air andreturn air, be sure the ducts are so designed and a divertingdamper so installed that the volume of circulating airentering the furnace cannot be reduced or restricted belowthat which would normally enter through the circulating airintake of the furnace. Furnaces when used in connectionwith cooling units must be installed on the upstream sideof cooling units to avoid condensation in the heating ele-ment or installed in parallel if required. If installed inparallel with a cooling unit, the damper or other meansused to control the flow of air shall be adequate to preventchilled air from entering the furnace, and if manuallyoperated must be equipped with means to prevent opera-tion of either unit unless the damper is in the full heat orcool position.

CHIMNEYDevices attached to the flue or vent for the purpose ofreducing heat loss up the chimney have not been testedand have not been included in the design certification ofthis furnace. We, the manufacturer, cannot and will not beresponsible for injury or damage caused by the use of suchuntested and/or uncertified devices, accessories orcomponents.

Unit must be vented through a good chimney or an approvedvent in accordance with Part 7, Venting of Equipment, of theNational Fuel Gas Code, ANSI 2223.1-1984 and addendumZ223.1a-1987, or applicable provisions of the load buildingcodes. Check chimney for soot, leaks, obstruction and pro-per height to prevent down draft. If it is necessary to con-struct a new chimney, local conditions such as necessaryheight, draft, and number of appliances served should bechecked with gas company requirements and local buildingcodes.

WARNING: DO NOT CONNECT THIS FURNACE TO ACHIMNEY FLUE SERVING A SEPARATE APPLIANCEDESIGNED TO BURN SOLID FUEL (WOOD OR COAL).

The design of this unit is A.G.A. certified for use with “B-l”or single wall vent. Check clearance label on blower doorfor clearances for both types. Minimum clearances forvarious vent pipe materials must be as specified by Under-writers’ Laboratories. The vent pipe must be of the samesize as the flue outlet of the furnace. The vent pipe shouldrun to the outside as directly as possible, keeping turns toa minimum.

A single-wall metal vent pipe shall terminate at least 5 feetin vertical height above the highest connected equipmentdrafthood outlet or flue collar. The vent outlet must extendabove the roof surface and through its flashing ter-minating in an approved cap. The vent pipe shall extend atleast 3 feet above the highest point where it passesthrough a roof of a building and at least 2 feet higher thanany portion of a building within a distance of 10 feet. Anapproved cap which does not obstruct the pipe outlet shallbe attached to the end of single-wall metal pipe. (SeeFigure 5.)

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PILOT ADJUSTMENT

c- -t The pilot flame should be adjusted to provide a soft flamethat surrounds the tip of the thermocouple or flame sen-

,- . ./ ~sor, a pilot flame of approximately one inch in length is

1 /i usual ly adequate for igni t ion and maintain ing theoperating circuit.

A constant burning pilot will consume approximately onecubic foot of gas per hour. An electric ignition system willconsume not in excess of 7 watts per hour of operation.

GAS INPUT TO FURNACECheck of input is important to prevent over firing of the fur-nace beyond its design-rated input. NEVER SET INPUTABOVE THAT SHOWN ON THE RATING PLATE. Use thefollowing table or formula to determine input rate:

i\

Input BTU/HR. =eating Value of Gas (BTU/ Ft3) x 3600

Time in Seconds (for 1 cu. ft.) of Gas

Prior to checking furnace input, make certain that all othergas appliances are shut off, with the exception of pilotburners.

NOTE: Remove shipping block from direct drive blowerwheels, before operating blower.

Blower speed should be adjusted to maintain theair rise range shown on the rating plate.

FAN CONTROL (See Wiring Diagrams)The fan control starts the blower circulating warm airwhen the bonnet temperature reaches a predeterminedtemperature set t ing stopping i t when the bonnettemperature falls below the “Off” setting. Set fan-off andfan-on temperature points as follows:

Set fan-off at 100°F and fan-on at 130°F. These settingsare suggested for average installations and may be variedif necessary after heating system is in operation. (Max. fansetting permitted 130”.) If a Camstat control is used, thefan setting is fixed, not adjustable.

SAFETY CHECKS - CONTROL CIRCUIT(See Wiring Diagrams)The Safety features of the control system should be check-ed to assure proper operation of the furnace. After check-ing the firing rate of the furnace as previously outlined andfinding that the system appears to be properly operating,proceed with the safety check as follows:

1 . PILOT BURNER CHECK - The pilot burner safety con-trol does not permit gas to flow through the main gasburner unless there is a pilot flame present to ignitethe gas. To check this function on furnaces equippedwith combination gas manifold controls remove capfrom over pilot valve, adjusting screw located on top ofthe manifold gas control. With the main gas burneroperating, use a small screwdriver and turn the adjust-ment screw clockwise until the pilot gas is turned off.(Note the number of turns required to do this.) Within90 seconds of the extinguishing of the pilot flame, themain gas control should operate closing the main gasvalve. Return the pilot adjustment screw to its originalposition and replace cap. Follow the lighting instruc-tion in relighting the pilot.

2 . FAN - LIMIT CONTROL CHECK - High limit cut-offis set at factory and needs no further adjustment fornormal operation.

The limit control is calibrated to prevent the airtemperature leaving the furnace from exceeding themaximum outlet temperature rating. The actual set-ting on the limit control to accomplish this will vary onthe furnaces depending on the particular furnace andits blower and motor combination. The limit controltemperature setting is factory set and should not bechanged. The high limit control prevents excessiveoutlet air temperature by shutting off the automaticmain gas valve when the maximum out let airtemperature has been reached. To check the controloperation, block the air flow through the unit tem-porarily. The limit switch should function to turn offthe automatic gas valve within a few minutes. Theblower must continue to run. Remove blockage im-mediately after switch operates.

FIELD REVERSING CONTROLS ANDFLUE PIPE CONNECTIONSGas Valve and Pilot Burner May be Reversed as Follows:

1.

2.

3.

4.

5.

6.

Remove the burner covers from both sides of furnace.

Remove burner and manifold assembly from unit.

Remove pilot assembly bracket from burner and l/4”tubing and the thermocouple connections from gasvalve.

DO NOT REVERSE BURNER TRAY ASSEMBLY.

Remove 4 screws holding manifold to mountingbracket and reverse to other side. Gas valve will haveto be rotated l/2 turn.

Install pilot assembly bracket on opposite end ofburner. A new piece of l/4” aluminum tubing (26” long)with fittings will be required. The tubing can be routedfrom the pilot to the valve. The thermocouple with theunit is to be rerouted and connected to the valve.

Replace the burner cover supports and covers to bothsides of furnace.

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