background image

Summary of Contents for F8MXN

Page 1: ...ESTING 5 ELECTRICAL CONNECTIONS 5 VENTING 5 ELECTROSTATIC DISCHARGE ESD PRECAUTIONS PROCEDURE 5 LOCATION 6 AIR FOR COMBUSTION AND VENTILATION 8 INSTALLATION 10 UPFLOW INSTALLATION 10 DOWNFLOW INSTALLA...

Page 2: ...19 1 2 in 368 x 495 mm rectangle c For 1600 CFM 22 in 559 mm round or 14 1 2 x 22 1 16 in 368 x 560mm rectangle d For airflow requirements above 1800 CFM see Air Delivery table in Product Data litera...

Page 3: ...e care and wear appropriate protective clothing safety glasses and gloves when handling parts and servicin q furnaces 1 Use only with type of gas approved for this furnace Refer to the furnace rating...

Page 4: ...not bypass limit switches 2 If a limit opens call a quallified serviceman to correct the condition and reset limit switch MINIMUM INCHES CLEARANCE TOCOMBUSTIBLE CONSTRUCTION This forced air furnace is...

Page 5: ...onic control Precautions will prevent electrostatic discharges from personnel and hand tools which are held during the procedure These precautions will help to avoid exposing the control to electrosta...

Page 6: ...emical exposures Commercial buildings Buildings with indoor pools Laundry rooms Hobby or craft rooms and Chemical storage areas THE BLOWER IS LOCATED TO THE LEFT OF THE BURNER SECTION AND CONDiTiONED...

Page 7: ...t into combustion air which can cause fouling and plugging of furnace components The temperature of the return air to the furnace is maintained between 55 F 13 O and 80 F 27 0 with no evening setback...

Page 8: ...ng Hazard warning in venting section of these instructions to determine if an adequate amount of make up air is available The requirements for combustion and ventilation air depend upon whether or not...

Page 9: ...tion ventilation and dilution of flue gases The furnace combustion air supply must be provided in accordance with this instruction manual The Standard Method 1 The space has no less volume than 50 cub...

Page 10: ...ween wall ceiling joints between wall panels at penetrations for plumbing electrical and gas lines etc Combination of Indoor and Outdoor Air 1 Indoor openings shall comply with the Indoor Combus tion...

Page 11: ...ubbase is used install as shown in Figure 12 If coil model numbers END4X ENW4X or coil casing model number NAEA are used install as shown in Figure 13 NOTE It is recommended that the perforated supply...

Page 12: ...met See Figure 2 and Figure 17 For POISONING HAZARD furnaces with 1 in 25 mm clearance requirement on side Failure to follow this warning could result in personal injury death and or property damage...

Page 13: ...tioning is used a vapor barrier is recommended Maintain a 1 in 25 mm clearance from combustible materials to supply air ductwork for a distance of 36 in 914 mm horizontally from the furnace See NFPA 9...

Page 14: ...al Unit Suspension OUTER DOOR ASSEMBLY L 8 203mm MIN FOR DOOR REMOVAL _ 4 6mm THREADED ROD 4 REQ J r SECURE ANGLE IRON TO BOTTOM OF FURNACE WITH 3 8 xS 4 19ram SCREWS TYPICAL FOR 2 SUPPORTS 1 25mm SQU...

Page 15: ...I 25mm UNDER FURNACE EXTEND OUT 12 305mm FROM FACE OF DOOR EQUIPMENT MANUAL SHUT OFF GAS VALVE SEDIMENT TRAP UNION 30 IN 762mm MIN WORKAREA WHEN USED WFH SINGLE WALL VENT CONNECTIONS Return Air Connec...

Page 16: ...exible connectors are used the maximum length shall not exceed 36 inches 915 mm 3 When lever handle type manual equipment shutoff valves are used they shall be T handle valves 4 The use of copper tubi...

Page 17: ...erformance included 3 4 in 19 mm washable filter mediasuch as contained infactor authorized accesso_ filter rack To determineairflow performance without this filter assume an additional0 1 In W C avai...

Page 18: ...NNECTION 1 CONNECTION 2 CONNECTION 3 COMBINATIONS ONLY ONLY ONLY OF 1 2 AND 3 5 TONS AND YES NO NO NO GREATER ALL OTHER MODELS YES NO NO NO 2000 CFM AND GREATER AT 6 ESP HI COOLING SPEED Figure 22 Hor...

Page 19: ...disconnect switch and furnace Use only copper wire ELECTRICAL SHOCK AND FIRE HAZARD Failure to follow this warning could result in personal injury death or property damage The cabinet MUST have an uni...

Page 20: ...U S for wire bushings strain relief etc 13 Reinstall cover to J Box Do not pinch wires between cover and bracket Figure 23 Relocating J Box FACTORY INSTALLED LOCATION ALTERNATE FIELD LOCATION Figure...

Page 21: ...field supplied 115 v control relay connected to EAC terminals may be added if humidifier operation is desired during blower operation NOTE DO NOT connect furnace control HUM 24VAC terminal to H humid...

Page 22: ...0 OR 60 VOLT PHASE _o 1208 230 I _ b I tVOLT I_J L_ I SINGLE fl _ 1 JPHASE _ GND I CONDENSING UNIT NOTES 1 Connect Y Y2 terminal as shown for proper operation 2 Some thermostats require a C terminal c...

Page 23: ...STAT ECM SINGLE TWO STAGE STAGE FURNACE HEAT PUMP E2D E2_ E2D EZD E2_ EZD E2_ F_q F_q 42_ F_q NOTE 4 _r_ o _7 N HUM 24VAC OUTDOOR SENSOR I See notes 1 2 3 4 and 7 Figure 31 ECM Single Stage Furnace an...

Page 24: ...horizontal pitch as required in the National Fuel Gas Code ANSI Z223 1 NFPA 54 Determine that there is no blockage or restriction leakage corrosion and other deficiencies which could cause an unsafe c...

Page 25: ...ions cannot be met an alternative venting design shall be used such as the listed chimney adapter kit with these furnaces which are listed for use with the kit a listed chimney lining system or a Type...

Page 26: ...pply Furnace use during construction of the building could cause the furnace to be exposed to halogen compounds causing premature failure of the furnace or venting system due to corrosion Vent dampers...

Page 27: ...nt or tile Remove mortar fuel oil residue debris and tile debris ve metal vent 1 No or liner I Clay tile misalignment missing sections gaps Condensate at bottom No Chimney exposed to outdoors below ro...

Page 28: ...e listed mechanical venter to match the Btuh input of the furnace being vented Follow all manufacturer s installation requirements for venting and termination included with the listed mechanical vente...

Page 29: ...owing these figures A03210 Figure 38 Downflow Application Vent Elbow Up SEE NOTES 1 2 4 5 6 7 8 9 on the page following these figures A03207 Figure 40 Downflow Application Vent Elbow Up then Right SEE...

Page 30: ...A03219 Figure 46 Horizontal Left Application Vent Elbow Right 0 SEE NOTES 1 2 4 5 7 8 9 on the page following these figures A03216 Figure 47 Horizontal Right Application Vent Elbow Left SEE NOTES 1 2...

Page 31: ...K HAZARD Failure to follow this warning could result in personal injury or death Blower access door switch opens 115 v power to control No component operation can occur unless switch is closed Caution...

Page 32: ...0 11 13 and 14 Use only factory supplied orifices See EXAMPLE 1 ALTITUDE PERCENT DERATE FT M OF MULTIPLIER DERATE FACTOR 0 2000 0 610 0 1 00 2001_3000 610 914 8 12 0 90 3001 4000 914 1219 12 16 0 86 4...

Page 33: ...ge first 1 Gas input for heating operation 2 Derate for altitude if applicable 3 Return and supply ducts for excessive restric tions causing static pressures greater than 0 50 In W C c Adjust air temp...

Page 34: ...ng certain blocked vent condi tions a Verify vent pipe is cool to the touch b Disconnect power to furnace and remove vent con nector from furnace vent elbow c Restore power to furnace and set room the...

Page 35: ...273 24 750 68 53 106 265 25 720 70 51 103 257 26 692 72 50 100 250 27 667 74 48 97 243 28 643 76 47 95 237 29 621 78 46 92 231 30 600 80 45 90 225 31 581 82 44 88 220 32 563 84 43 86 214 33 545 86 42...

Page 36: ...43 3 1 1000 43 2 6 43 2 7 43 2 8 43 2 9 775 42 3 2 42 3 3 42 3 4 42 3 5 3001 800 43 3 6 43 3 8 42 3 2 42 3 3 915 825 43 3 4 43 3 5 43 3 7 43 3 8 850 43 3 2 43 3 3 43 3 4 43 3 6 to 875 43 3 0 43 3 1 4...

Page 37: ...2 5 43 2 6 43 2 7 43 2 8 to 750 43 2 4 43 2 4 43 2 5 43 2 6 8000 775 43 2 2 43 2 3 43 2 4 43 2 4 2438 800 43 2 1 43 2 1 43 2 2 43 2 3 825 48 3 7 43 2 0 43 2 1 43 2 2 625 43 2 9 43 3 0 43 3 1 43 3 2 8...

Page 38: ...2 8 1000 43 2 4 43 2 5 43 2 6 43 2 7 775 43 3 5 43 3 7 43 3 8 42 3 2 3001 800 43 3 3 43 3 4 43 3 5 43 3 7 915 825 43 3 1 43 3 2 43 3 3 43 3 4 850 43 2 9 43 3 0 43 3 1 43 3 2 to 875 43 2 8 43 2 9 43 3...

Page 39: ...stionair supply Disconnectedor obstructed pressuretubing Low inlet gas pressure if LGPSused Restrictedvent If it opensduring bloweron delay period blower will come onfor the selectedbloweroff delay 4...

Page 40: ...furnace wiring information NOTE If the polarity is not correct the STATUS LED on the control will flash a status code 10 and prevent the furnace from heating The control system also requires an earth...

Page 41: ...er access door switch opens 115 v power to control No component operation can occur unless switch is closed Caution must be taken when manually closing this switch for service purposes NOTE The blower...

Page 42: ...ise as shown in Adjustments Section Adjust temperature rise as shown in Adjustments Section If outdoor temperature is below 70 F 21 C turn off circuit breaker to outdoor unit before running furnace in...

Page 43: ...hydrocarbons or aromatic content which may prevent an inadequate seat from occuring and RTV sealant such as G E RTV 162 G E RTV 6702 or Dow Corning RTV 738 sealant are required DO NOT substitute any...

Page 44: ...lame is no longer proved Blower On Belay If the burner flame is proven the blower motor is energized on HEAT speed 25 seconds after the gas valve GV is energized Simultaneously the electronic air clea...

Page 45: ...uit is opened the blower motor BLWM will continue operating for an additional 5 seconds if no other function requires blower motor BLWM operation Wiring Diagrams Refer to Figure 25 Figure 55 for wirin...

Page 46: ...RAN S FORM E R 115VAC 24VAC JUNCTION O UNMARKED TERMINAL m PCB CONTROL TERMINAL i FACTORY WIRING 115VAC FACTORY WIRING 24VAC FIELD WIRING 115VAC FIELD WIRING 24VAC CONDUCTOR ON CONTROL PCB Q FIELD WIR...

Page 47: ...TWIN terminal to the C thermostat terminal with a jumper wire to begin status code recovery and component test If a previous status code is present the code will repeat 4 times then go on to componen...

Page 48: ...er and wait 5 minutes to retry Check for Stuck closed gas valve relay on control Miswire or short to gas valve wire 10 POLARITY Check for correct line voltage polarity If units are twinned check for p...

Page 49: ...24 241 2 08 800 CFM 12 1200 CFM 14 1400 CFM 16 1600 CFM 20 2000 CFM 22 2200 CFM 1 2 F 8 3 M EFFICIENCY POSITION 4 X TYPE 5 L FEATURE 6 7 8 9 10 045 14 HEAT INPUT CABINET WIDTH 11 12 12 13 A 14 1 COOL...

Reviews: