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Bryant 333BAV manual

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Table of contents for the manual

  • Page 1

    NOTE: Read the entire instruction manual before performing any service or maintenance. This symbol → indicates a change since the last issue. These procedures are for size 60,000 through 120,000 Btuh units. Index Page SAFETY CONSIDERATIONS .....................................................1 ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS PROCEDURE .[...]

  • Page 2

    ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS PROCEDURE CAUTION: Electrostatic discharge can affect electronic components. Take precautions during furnace installation and servicing to protect the furnace electronic control and motor. Precautions will prevent electrostatic discharges from personnel and hand tools which are held during the procedure. Th[...]

  • Page 3

    a. Turn off electrical supply before removing blower and control access doors. b. Release filter retainer from clip at front of furnace casing. (See Fig. 4.) For side return, clips may be used on either or both sides of the furnace. c. Slide filter out. d. Clean filters by spraying tap water through filter from opposite direction of airflow. e. Rin[...]

  • Page 4

    a. Draft safeguard switch. b. Inducer motor. c. Pressure switch(es). d. Limit overtemperature switch(es). e. Gas valve. f. Hot surface ignitor. g. Flame-sensing electrode. h. Wiring connectors leading to control. 4. Remove 2 screws that secure relief box. (See Fig. 4.) 5. Remove 8 screws that secure flue collector box to center panel. Be careful no[...]

  • Page 5

    g. Flame-sensing electrode. h. Wiring connectors leading to control. 12. Reconnect vent pipe to relief box. 13. Replace blower door only. 14. Turn power and gas to ON. 15. Set thermostat and check furnace for proper operation. 16. Verify blower airflow and that airflow rate changes between heating and cooling. 17. Check for gas leaks. 18. Replace c[...]

  • Page 6

    → Fig. 8—Heating and Cooling Application Wiring Diagram for 2-Stage Thermostats and/or 2-Speed Condensing Units A97589 115-V FIELD- SUPPLIED FUSED DISCONNECT JUNCTION BOX CONTROL BOX 24-V TERMINAL BLOCK FOUR-WIRE HEATING- ONLY SEVEN WIRE 2-STAGE THERMOSTAT TERMINALS FIELD-SUPPLIED FUSED DISCONNECT 2-SPE[...]

  • Page 7

    → Fig. 9—Unit Wiring Diagram A97587 RED LS FRS2 RED RED FRS1 (WHEN USED) ALS2 DSS ORN LGPS YEL NOTE 9 LPS NOTE 9 (WHEN USED) RED YEL ORN (WHEN USED) NOTE 7 ALS1 ORN SWITCH 12 HEAT SET-UP SWITCH NORM HI HT LO HT * ON OFF OFF ON BLOWER- OFF DELAY (SEC.) SWITCH 3 4 90 SEC 135 SEC * 180 SEC 225 SEC ON OFF OFF ON 2-STAGE FURNACE CONTROL FACTORY SETT[...]

  • Page 8

    Fig. 10—Service Label A94169 SERVICE EACH OF THE FOLLOWING STATUS CODES IS A TWO-DIGIT NUMBE R WITH THE FIRST DIGIT DETERMINE D BY THE NUMBER OF SHORT FLASHES AND THE SECOND DIGIT BY THE NUMBER OF LONG FLASHES. 11 NO PREVIOUS CODE - Stored status codes are erased when power (115 V or 24V) to control is interr upted or 48 hours after each fault is[...]

  • Page 9

    A96062  If inducer and burners continue to operate, check for 24v at the gas valve. If 24v are present, verify that the thermostat is open across R and W. If no voltage is present, turn the gas valve control knob to the OFF position. Replace gas valve. Is indoor blower on ? 24v should be present across C and W. If not, check for: 1. Open ther[...]

  • Page 10

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  • Page 11

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  • Page 12

    A94328 SERVICE TRAINING Packaged Service Training programs are an excellent way to increase your knowledge of the equipment discussed in this manual, including:  • Unit Familiarization • Maintenance  • Installation Overview • Operating Sequence A large selection of product, theory, and skills programs is availa[...]