Lennox International Inc SL280UH090V48B, SL280UH070V36A Thermostat w Dual fuel capa Bilities

Page 32

TABLE 11

SL280 Field Wiring Applications With Conventional Thermostat (Continued)

DIP Switch Settings and On−Board Links (figure 34)

 

DIP Switch 1

 

 

 

 

Thermostat

Thermostat

On Board Links Must Be Cut To Select

 

Wiring Connections

 

Heating

System Options

 

 

 

 

Stages

 

 

 

 

Dual Fuel

 

 

L7724U

FURNACE

HEAT PUMP

 

 

TERM. STRIP

Single Stage

OFF

 

T’STAT

 

 

 

 

Heat Pump

 

 

 

 

 

 

 

CUT ON−BOARD LINK

H

 

 

 

 

 

 

 

ComfortSense

 

W951

 

67M41*

7000 L7724U

 

HEAT

 

 

 

 

PUMP

 

 

 

thermostat w/

 

 

 

 

 

 

 

 

 

dual fuel capa-

 

 

 

 

 

bilities

 

CUT ON−BOARD LINK

L

 

L

 

 

 

Capable of 2

 

W914

 

 

Y

 

DEHUM

 

 

 

 

 

 

 

stage gas heat

 

OR

Y2

 

 

control w/dehu-

 

HARMONY

 

 

 

 

 

 

 

 

midification

 

 

D

 

 

control

 

 

 

 

 

 

B

 

 

 

 

 

Y2

 

 

 

 

T

 

outdoor

 

 

 

 

 

 

 

 

T

 

sensor

 

 

 

 

 

Dual Fuel

 

 

L7724U

FURNACE

HEAT PUMP

 

CUT ON−BOARD LINK

TERM. STRIP

Two Stage

OFF

T’STAT

 

W915

 

 

Heat Pump

 

 

 

 

 

2 STAGE

 

 

 

 

 

COMPR

H

 

 

 

 

 

 

 

ComfortSense

 

CUT ON−BOARD LINK

 

67M41*

7000 L7724U

 

 

 

 

 

W951

 

 

 

thermostat w/

 

 

 

 

 

HEAT

 

 

 

dual fuel capa-

 

PUMP

 

 

 

 

 

 

 

 

bilities

 

CUT ON−BOARD LINK

L

 

L

Capable of 2

 

W914

 

 

 

 

DEHUM

 

 

 

stage gas heat

 

 

 

 

 

OR

Y2

 

Y2

control w/dehu-

 

HARMONY

 

 

 

 

 

 

 

 

midification

 

 

D

 

 

 

 

 

 

 

 

 

 

B

Y2

out blue

 

 

 

T

 

outdoor

 

 

 

 

 

 

 

 

T

 

sensor

 

 

 

 

 

* Connect W1 to W1 ONLY if using defrost tempering kit 67M41

NOTE − Do NOT make a wire connection between the room thermostat L terminal and the L terminal of the SL280 integrated control.

Page 32

Image 32
Contents Installation Instructions SL280UHV Table of ContentsUnit Dimensions − inches mm Return air from both sidesSide Return Air Opening Either SideSight Glass Access Panel Blower AssemblyParts Arrangement Shipping and Packing List Safety InformationSL280UHV Gas Furnace Use of Furnace as Construction Heater GeneralAir Handler Unit EvaporatorCombustion, Dilution & Ventilation Air Equipment in Confined Space ALL AIR from InsideEquipment Confined Space ALL AIR from Outside Equipment in Confined Space ALL AIR from OutsideEquipment in Confined Space Blower Motor Rigid LEG Setting EquipmentBottom 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 DischargeSide Vent Discharge Horizontal Left PositionHorizontal Right Position 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 hangRight−Side Air Discharge Horizontal ApplicationLeft−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 + = Data High Connection − = Data LOW Connection Integrated ControlRS−BUS Link TB82, future use −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 OperationSEC Heating Operation with TWO−STAGE ThermostatHeating Operation with Single Stage Thermostat 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