Lennox International Inc SL280UH090V48B Through an unused masonry chimney flue is not considered

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SINGLE appliance venting of a fan-assisted furnace into a tile-lined masonry chimney (interior or outside wall) is PROHIBITED. The chimney must first be lined with either type B1 vent or an insulated single wall flexible vent lining system which has been sized ac- cording to the provided venting tables and the vent pipe manufacturer’s instructions.

Common Venting Using Tile−Lined Interior Masonry Chimney and Combined Vent Connector

MINIMUM LENGTH = AS SHORT AS PRACTICAL.

FOR MAXIMUM LENGTH SEE NOTE TO LEFT

NOTE− Refer to provided venting tables for installations.

VENT

CONNECTOR

OTHER

APPLIANCE

FURNACE

AIR FLOW

INTERIOR TILE−LINED

MASONRY CHIMNEY

NOTE − the chimney must be properly sized per provided venting tables or lined with listed metal lining system.

PERMANENTLY

SEALED FIREPLACE

OPENING

FIGURE 24

DO NOT insulate the space between the liner and the

Never connect a Category I appliance to a chimney that is

chimney wall with puffed mica or any other loose gran-

servicing a solid−fuel appliance. If a fireplace chimney flue

is used to vent this appliance, the fireplace opening must

ular insulating material

be permanently sealed.

 

 

IMPORTANT

A type B or listed chimney lining system that passes

through an unused masonry chimney flue is not considered

 

 

to be exposed to the outdoors.

A fan−assisted furnace may be commonly vented into an existing lined masonry chimney if the following conditions are met:

SThe chimney is currently serving at least one drafthood equipped appliance

SThe vent connectors and chimney are sized according to the provided venting tables.

If type B1 double-wall vent is used inside a chimney, no oth- er appliance can be vented into the chimney. The outer wall of type B1 vent pipe must not be exposed to flue products. A type B1 vent or masonry chimney liner shall terminate above the roof surface with a listed cap or a listed roof as- sembly according to the terms of their respective listings and the vent manufacturer’s instructions.

When inspection reveals that an existing chimney is not safe for the intended purpose, it shall be rebuilt to conform to nationally recognized standards, lined or relined with suitable materials, or replaced with a gas vent or chimney suitable for venting SL280UHV series units. The chimney passageway must be checked periodically to ensure that it is clear and free of obstructions.

Do not install a manual damper, barometric draft regulator, or flue restrictor between the furnace and the chimney.

General Venting Requirements

Vent all SL280UHV furnaces according to these instruc- tions:

1 − Vent diameter recommendations and maximum allow- able piping runs are found in the provided venting tables.

2 − In no case should the vent or vent connector diameter be less than the diameter specified in the provided venting tables.

3 − The minimum vent capacity determined by the sizing tables must be less than the low fire input rating and the maximum vent capacity must be greater than the high fire input rating.

4 − Single appliance vents − If the vertical vent or tile-lined chimney has a larger diameter or flow area than the vent connector, use the vertical vent diameter to de- termine the minimum vent capacity and the vent connector diameter to determine the maximum vent capacity. The flow area of the vertical vent, however, shall not exceed 7 times the flow area of the listed ap- pliance categorized vent area, drafthood outlet area or flue collar area unless designed according to approved engineering methods.

5 − Multiple appliance vents − The flow area of the largest section of vertical vent or chimney shall not exceed 7 times the smallest listed appliance categorized vent area, drafthood outlet area or flue collar area unless de- signed according to approved engineering methods.

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Contents Installation Instructions SL280UHV Table of ContentsUnit Dimensions − inches mm Return air from both sidesSide Return Air Opening Either SideParts Arrangement Access Panel Blower AssemblySight Glass SL280UHV Gas Furnace Safety InformationShipping and Packing List Use of Furnace as Construction Heater GeneralAir Handler Unit EvaporatorCombustion, Dilution & Ventilation Air Equipment in Confined Space ALL AIR from InsideEquipment in Confined Space Equipment in Confined Space ALL AIR from OutsideEquipment Confined Space ALL AIR from Outside Bottom Setting EquipmentBlower Motor Rigid LEG 20 X 25 X Furnace FrontIndoor AIR Return AIR BaseHorizontal Application Installation Clearances Top Left RightEnd Bottom Typical Horizontal ApplicationFilters Duct SystemVenting Upflow PositionTop Vent Discharge Left Side Vent DischargeHorizontal Right Position Horizontal Left PositionSide Vent Discharge Common Venting Using Metal−Lined Masonry Chimney Disconnected VentSticker Vent PipeVent Connector Through an unused masonry chimney flue is not considered102 127 −1/2 152 178 10−1/2 MIN MAX Feet FAN + FAN FAN + NAT 130 Carbon Monoxide Poisoning Hazard Ers or straps. Install a drip leg in vertical pipe runs to − In some localities, codes may require the installationGas Piping Every 8 to 10 feet 2.44 to 3.01 m with suitable hangLeft−Side Air Discharge Horizontal ApplicationRight−Side Air Discharge Interior MAKE−UP BOX Installation ElectricalElectrostatic Discharge ESD BOXNon−Communicating CommunicatingIcomfortt Integrated Control Outdoor Unit Icomfort Touch NON−COMMUNICATING System Wiring Communicating System Wiring120V Connections ApplicationsDIP Switch Settings and On−Board Links See figure OFF Single Stage Thermostat w Dual fuel capa Bilities SL280UHV Schematic Wiring Diagram Typical SL280UHV Field Wiring Diagram RS−BUS Link TB82, future use Integrated Control+ = Data High Connection − = Data LOW Connection −10% approx OFF On−Board Links 1045 985940 880SL280UH090V36B Blower Performance less filter 1280 12201155 10951295 12351170 11101360 12301165 11001290 12251160 1380+18% 1605 SL280UH110V60C Blower Performance less filter +18% 1785 SL280UH135V60D Blower Performance less filter Operating Sequence Compressor Thermostat energizes Y2For Your Safety Read Before Lighting Unit Start−UpWhite Rodgers GAS Valve Honeywell GAS ValveGas Pressure Adjustment GAS Meter Clocking ChartProper Combustion DialHigh Altitude Other Unit Adjustments Heating Sequence of OperationHeating Operation with Single Stage Thermostat Heating Operation with TWO−STAGE ThermostatSEC Service Electrical SHOCK, Fire Or Explosion HazardSL280UHV BURNER, Combustion AIR Inducer Assembly 13− To clean the combustion air inducer visually inspect11− Back wash using steam. Begin from the burner opening 17− Reinstall burner box, manifold assembly and burner boxSL280UHV NOX Inserts Planned Service Repair Parts ListIntegrated Control Diagnostic Modes Integrated Control Diagnostic CodesNormal operation 5 seconds after fault recovered Furnace / air handler. Clears after fault recoveredPower at the thermostat. Alert stops all services Equipment is unable to communicate. IndicatesReconfigure the system. Replace control if heating Missioning and Execute ’Set Factory Default mode’Control will still operate on default parameter set Ate feature will be set as ’installed’ and that couldLow pressure switch failed open Sumes normal operation after fault is clearedFault is cleared Tion after fault is clearedOpen or not within specifications −hour soft lock Out. Clears when flame has been proven stableSoft lockout or reset To flame failurePair/add duct. Cleared after the current service de Is not running. Check power to outdoor unit. ClearsError after current is sensed in both RUN Vice is removed, or after power resetSor run cycle, or after power reset Program Unit Capacity/Size Mode FinishedTroubleshooting Heating Sequence of Operation Call for FIRST−STAGE HeatCall for SECOND−STAGE Heat Call for Heat SatisfiedCall for Heat Satisfied FIRST−STAGE Heat SECOND−STAGE Heat 2ND Stage HeatTroubleshooting Cooling Sequence of Operation Call for CoolingTroubleshooting Continuous Fan Sequence of Operation Call for FAN
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