Payne PG9MTAV, Service Manual

Page 1: ...RAL 2 ELECTROSTATIC DISCHARGE ESD PRECAUTIONS 2 CARE AND MAINTENANCE 3 Cleaning and or Replacing Air Filter 3 Blower Motor and Wheel Maintenance 3 Cleaning Burners 4 Cleaning Heat Exchangers 15 Primary Heat Exchangers 15 Secondary Heat Exchangers 15 Flushing Collector Box and Drainage System 15 Servicing Hot Surface Igniter 16 Electrical Controls And Wiring 18 Checking Heat Tape Operation If Appli...

Page 2: ...ed in an upflow application An upflow furnace application is where the blower is located below the combustion and controls section of the furnace and conditioned air is discharged upward Since this furnace can be installed in any of the 4 positions shown in Fig 1 you may need to revise your orientation to component location accordingly ELECTROSTATIC DISCHARGE ESD PRECAUTIONS UNIT DAMAGE HAZARD Fai...

Page 3: ...hrough filter in opposite direction of airflow 5 Rinse filter and let dry Oiling or coating of filter is not recommended 6 Slide filter into furnace 7 Replace blower door 8 Turn on electrical supply to furnace Procedure 2 Blower Motor and Wheel Maintenance To ensure long life economy and high efficiency clean accumulated dirt and grease from blower wheel and motor annually The inducer and blower m...

Page 4: ...fer to furnace wiring diagram and connect thermostat leads if previously disconnected See Fig 18 UNIT DAMAGE HAZARD Failure to follow this caution may result in unit component damage Heating speed selection MUST be adjusted to provide proper temperature rise as specified on the rating plate CAUTION 14 Turn on electrical supply Manually close blower access door switch Use a piece of tape to hold sw...

Page 5: ...K HAZARD Failure to follow this warning could result in personal injury or death Igniter wires must be securely placed in slot in manifold grommet or else they could become pinched or severed and electrically shorted WARNING 12 Reconnect wires to gas valve and igniter Refer to furnace wiring diagram for proper wire location 13 Reinstall gas supply pipe to furnace gas control valve using backup wre...

Page 6: ...6 A07706 Fig 6 Upload Installations Top Vent PG9MTAV ...

Page 7: ...7 A07707 A07707 Fig 7 Upload Installations Vent Through Left Side PG9MTAV ...

Page 8: ...8 A07708 Fig 8 All Models Vent Through Right Side PG9MTAV ...

Page 9: ...9 A07829 Fig 9 Downflow Left Side Vent and Trap PG9MTAV ...

Page 10: ...10 A07830 Fig 10 Downflow Right Side Vent and Trap PG9MTAV ...

Page 11: ...11 A07709 Fig 11 Horizontal Left Through Top PG9MTAV ...

Page 12: ...12 A07710 Fig 12 Horizontal Left Side Vent PG9MTAV ...

Page 13: ...13 A07711 Fig 13 Horizontal Right Through Top PG9MTAV ...

Page 14: ...14 A07712 Fig 14 Horizontal Right Side Vent PG9MTAV ...

Page 15: ...ter cleaning inspect heat exchangers to ensure they are free of all foreign objects that may restrict flow of combustion products 7 Reverse items 4 and 5 for reassembly UNIT MAY NOT OPERATE Failure to follow this caution may result in improper unit operation The ground wire from the gas valve MUST be attached to the burner box attachment screw or furnace lockout may occur CAUTION 8 Refer to furnac...

Page 16: ... lb of torque NOTE If gasket between inducer housing and collector box is damaged in any way it must be replaced See Fig 16 11 Refer to furnace wiring diagram and connect wires to inducer motor and pressure switch or connectors 12 Reconnect pressure tubes to pressure switch See diagram on main furnace door for proper location of tubes Be sure tubes are not kinked See Fig 6 7 or 8 13 Turn on gas an...

Page 17: ...ading should be between 40 ohms and 70 ohms 5 Remove igniter BURN HAZARD Failure to follow this caution may result in personal injury Allow igniter to cool before removal Normal operating temperatures exceed 2000 F CAUTION a Using a 1 4 in driver remove the single screw securing the igniter bracket to the burner box and carefully withdraw the igniter through the bottom of the burner box without st...

Page 18: ...around the condensate drain trap and drain line There is no need to use heat tape within the furnace casing Most heat tapes are temperature activated and it is not practical to verify the actual heating of the tape Check the following 1 Check for signs of physical damage to heat tape such as nicks cuts abrasions gnawing by animals etc 2 Check for discolored heat tape insulation If any damage or di...

Page 19: ...N A93058 32_ F MINIMUM INSTALLED AMBIENT OR FREEZE PROTECTION REQUIRED Fig 19 Winterizing the Furnace To retrieve last code remove 1 of the red main limit wires for 1 to 4 sec until the LED light goes out then reconnect it Do not leave red wire disconnected for longer periods of time as the control will assume an overtemperature condition exists and will respond with blower operation This places t...

Page 20: ...20 A07822 Fig 20 Wiring Diagram PG9MTAV ...

Page 21: ...21 A07825 Fig 21 Service Label PG9MTAV ...

Page 22: ... W Morris St D Indianapolis IN 46231 Printed in U S A Edition Date 04 08 Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations Catalog No SG PG9MTA 02 Replaces SG PG9MTA 01 PG9MTAV ...