background image

506843-01

Page 24  of  39

Issue 1132

Thermostat

Install the room thermostat according to the instructions

provided with the thermostat.  See Figure 22 for thermostat

designations.  If the furnace is being matched with a heat

pump, refer to the FM21 installation instruction or appropriate

dual fuel thermostat instructions.

Indoor Blower Speeds

1. When the thermostat is set to “FAN ON,” the indoor

blower will run continuously on the fan speed when

there is no cooling or heating demand.

2. When the unit is running in the heating mode, the indoor

blower will run on the heating speed.

3. When there is a cooling demand, the indoor blower will

run on the cooling speed.

Condensing Unit Thermostat Designations

(Refer to Specific Thermostat and Outdoor Unit.)

* Note: 

 “R” Required on some outdoor units.

Figure 22

Summary of Contents for 80G1DFE

Page 1: ...ises Inc A Lennox International Inc Company 215 Metropolitan Drive West Columbia SC 29170 This manual must be left with the homeowner for future reference INSTALLATION INSTRUCTIONS A80DF1E 80G1DFE Warm Air Gas Furnace Downflow Air Discharge P 506843 01 P506843 01 UnitDimensions 2 A80DF1E 80G1DFEPartsArrangement 3 A80DF1E 80G1DFEGasFurnace 4 Shipping and Packing List 4 Safety Information 4 Use of F...

Page 2: ...1DFE Unit Dimensions inches mm FRONT VIEW SIDE VIEW Model A 368 14 1 2 A80DF1E 80G1DFE B C in mm in mm in mm 340 13 3 8 330 13 533 21 504 19 7 8 495 19 1 2 D in mm 203 8 121 4 3 4 090 16 110 20 070 12 045 12 446 17 1 2 416 16 3 8 406 16 159 6 1 4 ...

Page 3: ...3 01 Page 3 of 39 Issue 1132 Expanded View Figure 1 BLOWER ASSEMBLY CABINET CONTROL BOX INTERNAL FLUE PIPE ASSEMBLY FLUE CHASE HEAT EXCHANGER GAS VALVE ACCESS PANEL BURNER BOX ASSEMBLY COMBUSTION AIR INDUCER ...

Page 4: ... performed by a licensed professional installer or equivalent service agency or the gas supplier WARNING Certifications These units are CSAInternational certified to ANSI Z21 47 In the USA installation of gas furnaces must conform with local building codes In the absence of local codes units must be installed according to the current National Fuel Gas Code ANSI Z223 1 The National Fuel Gas Code is...

Page 5: ...om thermostat must control the furnace The use of fixed jumpers that will provide continuous heating is not allowed The return air duct must be provided and sealed to the furnace Return air temperature range between 60 F 16 C and 80 F 27 C must be maintained Air filters must be installed in the system and must be maintained during construction Air filters must be replaced upon construction complet...

Page 6: ...nt pipe or chimney As a result combustion gases enter the living space creating a potentially dangerous situation In the absence of local codes concerning air for combustion and ventilation use the guidelines and procedures in this section to install this furnaces to ensure efficient and safe operation You must consider combustion air needs and requirements for exhaust vents and gas piping A porti...

Page 7: ...aining the furnace the return air must be handled by ducts which are sealed to the furnace casing and which terminate outside the space containing the furnace This is especially important when the furnace is mounted on a platform in a confined space such as a closet or small equipment room Even a small leak around the base of the unit at the platform or at the return air duct connection can cause ...

Page 8: ...let and outlet air openings shall each have a free area of at least one square inch per 4 000 Btu 645 mm per 1 17 kW per hour of the total input rating of all equipment in the enclosure Figure 5 EQUIPMENT IN CONFINED SPACE ALL AIR FROM OUTSIDE NOTE Each air duct opening shall have a free area of at least one square inch per 2 000 Btu 645 mm per 59 kW per hour of the total input rating of all equip...

Page 9: ...wer housing Setting Equipment WARNING Do not install the furnace on its front or its back Do not connect the return air ducts to the back of the furnace Doing so will adversely affect the operation of the safety control devices which could result in personal injury or death Downflow Applications Allow for clearances to combustible materials as indicated on the unit nameplate Minimum clearances for...

Page 10: ...ace may be installed on a combustible wood floor if an optional additive base is installed between the furnace and the combustivle floor WARNING Improper installation of the furnace can result in personal injury or death Combustion and flue products must never be allowed to enter the return air system or air in the living space Use sheet metal screws and joint tape to seal return air system to fur...

Page 11: ...ns for correctly sized opening in floor and installation of cabinet 2 When cooling cabinet is in place set and secure the furnace according to the instructions that are provided with the cooling coil Secure the furnace to the cabinet 3 Seal the cabinet and check for air leaks Return Air Opening Downflow Units Return air may be brought in only through the top opening of a furnace installed in the d...

Page 12: ...ired for the unit to operate properly A filter must be in place any time the unit is operating Duct System Use industry approved standards such as those published by Air Conditioning Contractors of America or American Society of Heating Refrigerating and Air Conditioning Engineers to size and install the supply and return air duct system This will result in a quiet and low static system that has u...

Page 13: ... for common venting A chimney with one or more sides exposed to the outside of the structure is considered to be an exterior chimney An exterior masonry chimney that is not tile lined must be lined with B 1 vent or a listed insulated flexible metal vent An exterior tile lined chimney that is sealed and capped may be lined with a listed uninsulated flexible metal vent If the existing chimney will n...

Page 14: ...mney Never connect a Category I appliance to a chimney that is servicing a solid fuel appliance If a fireplace chimney flue is used to vent this appliance the fireplace opening must be permanently sealed Atype B or listed chimney lining system that passes through an unused masonry chimney flue is not considered to be exposed to the outdoors General Venting Requirements Vent all furnaces according ...

Page 15: ...ints between sections of single wall connector piping shall be fastened by screws or other approved means 13 When the vent connector used for Category I appliances must be located in or pass through a crawl space attic or other areas which may be cold that portion of the vent connector shall be constructed of listed doublewall type B1 vent material or material having equivalent insulation qualitie...

Page 16: ...configureations with zero lateral lengths are assumed to have no elbows in the vent system For all other vent configurations the vent system is assumed to have two 90 elbows For each additional 90 elbow or equivalent for example two 45 elbows equal one 90 elbow beyond two the maximum capacity listed in the venting table should be reduced by 10 percent 0 90 x maximum listed capacity ...

Page 17: ...configureations with zero lateral lengths are assumed to have no elbows in the vent system For all other vent configurations the vent system is assumed to have two 90 elbows For each additional 90 elbow or equivalent for example two 45 elbows equal one 90 elbow beyond two the maximum capacity listed in the venting table should be reduced by 10 percent 0 90 x maximum listed capacity ...

Page 18: ... Capacity Type B Double Wall Vents with Type B Double Wall Connectors Serving Two or More Category I Appliances Common Vent Capacity Type B Double Wall Vents with Type B Double Wall Connectors Serving Two or More Category I Appliances Table 5 Table 6 ...

Page 19: ... Two or more Category I Appliances Table 8 NOTE Single appliance venting configureations with zero lateral lengths are assumed to have no elbows in the vent system For all other vent configurations the vent system is assumed to have two 90 elbows For each additional 90 elbow or equivalent for example two 45 elbows equal one 90 elbow beyond two the maximum capacity listed in the venting table shoul...

Page 20: ...m are located and other spaces of the building Turn on clothes dryers and any appliances not connected to the common venting system Turn on any exhaust fans such as range hoods and bathroom exhausts so they will operate at maximum speed Do not operate a summer exhaust fan Close fireplace dampers 4 Follow the lighting instructions Turn on the appliance that is being inspected Adjust the thermostat ...

Page 21: ...e The piping must be supported at proper intervals every 8 to 10 feet 2 44 to 3 01 m with suitable hangers or straps Install a drip leg in vertical pipe runs to the unit 5 A 1 8 N P T plugged tap or pressure post is located on the gas valve to facilitate test gauge connection See Figure 26 6 In some localities codes may require the installation of a manual main shut off valve and union furnished b...

Page 22: ... gas lines gas valve must be disconnected and isolated See Figure 19 Gas valves can be damaged if subjected to pressures greater than 1 2 psig 3 48 kPa 14 inches w c IMPORTANT Electrostatic discharge can affect electronic components Take precautions during furnace installation and service to protect the furnace s electronic controls Precautions will help to avoid control exposure to electrostatic ...

Page 23: ...e 25 for integrated control configuration This terminal is energized when the indoor blower is operating Any accessory rated up to one amp can be connected to this terminal with the neutral leg of the circuit being connected to one of the provided neutral terminals If an accessory rated at greater than one amp is connected to this terminal it is necessary to use an external relay One line voltage ...

Page 24: ...thermostat instructions Indoor Blower Speeds 1 When the thermostat is set to FAN ON the indoor blower will run continuously on the fan speed when there is no cooling or heating demand 2 When the unit is running in the heating mode the indoor blower will run on the heating speed 3 When there is a cooling demand the indoor blower will run on the cooling speed Condensing Unit Thermostat Designations ...

Page 25: ...506843 01 Page 25 of 39 Issue 1132 Wiring Diagram Figure 23 ...

Page 26: ...506843 01 Page 26 of 39 Issue 1132 Typical Field Wiuring Diagram Figure 24 Figure 25 Integrated Control Automatic Hot Surface Ignition System ...

Page 27: ...ons exactly a fire or explosion may result causing property damage personal injury or death WARNING 6 Move switch on gas valve to OFF Do not force See Figure 26 7 Wait five minutes to clear out any gas If you then smell gas STOP Immediately call your gas supplier from a neighbor s phone Follow the gas supplier s instructions If you do not smell gas go to next step 8 Move switch on gas valve to ON ...

Page 28: ...ccurate reading shut off all other gas appliances connected to meter Supply Pressure Measurement A threaded plug on the inlet side of the gas valve provides access to the supply pressure tap Remove the threaded plug install a field provided barbed fitting and connect a manometer to measure supply pressure See Table 12 for proper line pressure Replace the threaded plug after measurements have been ...

Page 29: ...blower is deenergized Longer off delay settings provide lower return air temperatures shorter settings provide higher return air temperatures See Figure 28 Table 12 For Safety shut unit off and remove manometer as soon as an accurate reading has been obtained Take care to replace pressure tap plub IMPORTANT HEAT FAN OFF TIME IN SECONDS Figure 28 Manifold Pressure Settings and Pressure Switch NOTE ...

Page 30: ...urn off electrical power to furnace 2 Remove blower access panel 3 Disconnect existing speed tap at integrated control speed terminal NOTE Termination of any unused motor leads must be insulated 4 Place unused blower speed tap on integrated control PARK terminal or insulate 5 Refer to blower speed selection chart on unit wiring diagram for desired heating or cooling speed See Blower performance da...

Page 31: ...660 415 1425 300 240 1225 215 0 40 1615 430 1395 310 255 1185 0 50 1570 450 325 1210 265 1145 240 0 60 1545 465 340 1165 280 1085 315 0 70 N A 350 1120 295 1040 265 0 80 N A 365 1080 305 280 Low cfm Watts 1195 130 1145 140 1105 145 1040 160 1005 170 945 180 865 185 810 200 755 210 Medium 1000 185 210 255 275 230 External Static Pressure in w Air Volume Watts at Various Blower Speeds High Medium Hi...

Page 32: ...e connections 2 Check for the correct voltage at the furnace furnace operating Correct voltage is 120VAC 10 3 Check amp draw on the blower motor with inner blower panel in place Unit Nameplate___________Actual_______________ Service ELECTRICAL SHOCK FIRE OR EXPLOSION HAZARD Failure to follow safety warnings exactly could result in dangerous operation serious injury death or property damage Imprope...

Page 33: ...ove the combustion air inducer to avoid damaging blower gasket If gasket is damaged it must be replaced to prevent leakage 5 Remove the collector box located behind the combustion air inducer Be careful with the collector box gasket If the gasket is damaged it must be replaced to prevent leakage 6 Disconnect gas supply piping Remove the screw securing the burner box cover and remove cover Remove t...

Page 34: ...Ox inserts 16 Reinstall collector box and combustion air assembly Reinstall all screws to the collector box and combustion air inducer Failure to replace all screws may cause leaks Inspect gaskets for any damage and replace if necessary 17 Reinstall burner box manifold assembly and burner box cover NOx INSERTS Figure 30 18 Reconnect all wires 19 Reconnect top cap and vent pipe to combustion air in...

Page 35: ... seal between the return air and the room where the furnace is installed Return air duct Must be properly attached and provide an air seal to the unit Operating performance Unit must be observed during operation to monitor proper performance of the unit and the vent system Combustion gases Flue products must be analyzed and compared to the unit specifications Problems detected during the inspectio...

Page 36: ...pair parts are available through independent Allied Air dealers When ordering parts include the complete furnace model number listed on the CSA International nameplate Example A801DF045JP24A 01 All service must be performed by a licensed professional installer or equivalent service agency or gas supplier Heating Parts Flame sensor Heat exchanger assembly Gas manifold Combustion air inducer Gas val...

Page 37: ...506843 01 Page 37 of 39 Issue 1132 Start Up Performance Check List UNIT SET UP ...

Page 38: ...506843 01 Page 38 of 39 Issue 1132 UNIT OPERATION ...

Page 39: ...nimum height of eight 8 feet above grade directly in line with the exhaust vent terminal for the horizontally vented gas fueled heating appliance or equipment The sign shall read in print size no less than one half 1 2 inch in size GAS VENT DIRECTLY BELOW KEEP CLEAR OF ALL OBSTRUCTIONS 4 INSPECTION The state or local gas inspector of the side wall horizontally vented gas fueled equipment shall not...

Reviews: