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Bryant 350MAV manual

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Table of contents for the manual

  • Page 1

    WARNING: ELECTRICAL SHOCK, FIRE, OR EXPLOSION HAZARD Failure to follow safety warnings exactly could result in dangerous operation, serious injury, death, or property damage. Improper servicing could result in dangerous operation, serious indury, death, or property damage. Before servicing, disconnect all electrical power to fur- nace. When servici[...]

  • Page 2

    CSA B149.1-00 (NSCNGPIC) in Canada; and the Installation Standards, Warm Air Heating and Air Conditioning Systems (NFPA 90B) ANSI/NFPA 90B. In Canada, refer to the CAN/CGA-B/49.1- and .2-M95 National Standard of Canada, Natural Gas and Propane Installation Codes (NSCNGPIC). Wear safety glasses and work gloves. Have a fire extinguisher available dur[...]

  • Page 3

    WARNING: Turn off the gas and electrical supplies to the unit before performing any maintenance or service. Follow the operating instructions on the label attached to the furnace. Failure to follow this warning could result in personal injury or death. The minimum maintenance that should be performed on this equipment is as follows: 1. Check and cl[...]

  • Page 4

    1. Turn off electrical supply to furnace. 2. Remove main furnace door and blower access panel. 3. Disconnect blower motor wires from furnace control. Field thermostat connections may need to be disconnected depending on their length and routing. 4. Remove control box mounting screws, and position control box, transformer, and door switch assembly t[...]

  • Page 5

    7. Remove screws that secure manifold to burner box. (See Fig. 5.) NOTE: Do not remove burner box from cell panel. 8. Remove manifold, orifices, and gas valve as 1 assembly. 9. Remove screws attaching burner assembly in burner box. 10. Remove burner assembly from burner box. NOTE: All burners are attached to burner bracket and can be removed as 1 a[...]

  • Page 6

    CAUTION: The ground wire from the gas valve MUST be attached to the burner box attachment screw. Failure to attach this ground wire to an adequate casing ground will cause the furnace control to lock out. NOTE: Be sure burner box gasket is installed between burner box and cell panel. If gasket is damaged, replace it. NOTE: Inspect combustion-air in[...]

  • Page 7

    14. Check furnace operation through 2 complete heat operating cycles. Check area below inducer housing, vent pipe, and condensate trap to ensure no condensate leaks occur. If leaks are found, correct the problem. WARNING: FIRE OR EXPLOSION HAZARD Failure to follow the safety warnings exactly could result in serious injury, death, or property damage[...]

  • Page 8

    box or inlet pipe, but can be removed without removing either. After removing screw, slide igniter and bracket toward outside of burner box and pull straight out. CAUTION: The igniter is fragile. DO NOT allow it to hit the side of the burner box opening while removing or replacing it. b. Inspect igniter for a white area indicating a crack may be pr[...]

  • Page 9

    1. Turn off electrical supply to furnace. 2. Remove main furnace door. 3. Disconnect cap from unused drain tap on inducer housing. (See Fig. 14.) 4. Connect field-supplied 1/2-in. I.D. tube to upper inducer housing drain connection. 5. Insert funnel in drain tube and pour up to 1 quart antifreeze, propylene glycol (RV, swimming pool antifreeze, or [...]

  • Page 10

    1. LED flashes a current status code, or code 11, 4 times. Record this status code for further troubleshooting. 2. The inducer will start and continue to run until test is over. 3. Hot surface igniter (HSI) is energized for 15 sec, then de-energized. 4. The blower motor operates on HEATING speed for 10 sec, then turns off. 5. The blower motor opera[...]

  • Page 11

    A99118 Fig. 14 — Inducer Housing Drain Tube A99119 Fig. 15 — Funnel in Drain and Antifreeze Running Through Trap — 11 —[...]

  • Page 12

    Fig. 16 — Wiring Diagram A02157 PCB TRAN FRS NOTE #11 LS PRS (WHE N USED) LGPS FUSED OR CIRCUIT BREAKER DI SCONNEC T SWI TCH ( WHEN REQ ’ D) NOTE #2 JB L1 L1 BLWR HI/LO TO 115V AC FI ELD DISCONNECT NOTE #2 EQUIP MENT GROUND SPARE- 1 HEAT FA N COOL HSIR EAC-1 START OL HI MED HI MED L O LO BLW M SCHEMATI C DI AGRAM (NA TURAL GAS & P RO P AN E[...]

  • Page 13

    Fig. 17 — Service Label A02154 SER VI CE To initiate th e component te st sequence, shut OFF the room thermost at or disconnect the "R" therm ostat lead. Briefl y short the TEST/TWIN ter m inal to the "Com 24V" ter- minal. St atus LED will fl ash code and then tur n ON the i nducer moto r . The inducer motor will run for the e[...]

  • Page 14

    A02204a Is LED status light on? Is LED status light blinking rapidly without a pause? Is LED status light blinking ON/OFF slowly with a combination of short and long flashes? Determine status code. The status code is a 2 digit number with the first digit determined by the number of short flashes and the second digit by the number of long flashes? G[...]

  • Page 15

    A02204b 11 NO PREVIOUS CODE – Stored codes are erased after 72 hours. On RED LED boards stored status codes can also be erased whene ver pow er (115V or 24V) is interrupted. Run system through a heating or cooling cycle to check system. 12 BLOWER ON AFTER POWER UP – (115V OR 24V) – Normal operation. Blower runs f or 90 seconds, if unit is pow[...]

  • Page 16

    © 2002 Bryant Heating & Cooling Systems 7310 W. Morris St. Indianapolis, IN 46231 — 16 — Printed in U.S.A. sp0558 Catalog No. 5335-207[...]