Bryant 376CAV Service And Maintenance Procedures Manual
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Bryant 376CAV Service And Maintenance Procedures Manual

Bryant 376CAV Service And Maintenance Procedures Manual

Single-stage induced-combustion gas-fired furnace series h&j
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See also: Information Manual , User's Information Manual
NOTE: Read the entire instruction manual before starting the
installation.
SAFETY CONSIDERATIONS .....................................................1
INTRODUCTION ..........................................................................2
PROCEDURE ................................................................................2
CARE AND MAINTENANCE.....................................................2
Cleaning and/or Replacing Air Filter.......................................2
Blower Motor and Wheel.........................................................3
Cleaning Heat Exchanger .........................................................5
Electrical Controls and Wiring.................................................6
WIRING DIAGRAMS...................................................................9
Troubleshooting..............................................................................9
REGISTERED QUALITY SYSTEM
Fig. 1-Model 376CAV Horizontal
SAFETY CONSIDERATIONS
Installing and servicing heating equipment can be hazardous due to
gas and electrical components. Only trained and qualified person-
nel should install, repair, or service heating equipment.
Untrained personnel can perform basic maintenance functions
such as cleaning and replacing air filters. All other operations must
be performed by trained service personnel. When working on
heating equipment, observe precautions in the literature, tags, and
labels attached to or shipped with the unit and other safety
precautions that may apply.
service and
maintenance procedures
SINGLE-STAGE
INDUCED-COMBUSTION
GAS-FIRED FURNACE
EFFICIENCY
RATING
CERTIFIED
CERTIFIED
®
A94087
Cancels: SP04-60
Fig. 2-Model 376CAV Downflow
Fig. 3-Model 395CAV Uplfow
Follow all safety codes. In the United States, follow all safety
codes including the National Fuel Gas Code (NFGC) NFPA No.
54-1999/ANSI Z223.1-1999. In Canada, refer to the current
edition of the National Standard of Canada CAN/CGA-B149.1-
and .2-M95, Natural Gas and Propane Gas Installation Codes
(NSCHGPIC). Wear safety glasses and work gloves. Have fire
extinguisher available during start-up and adjustment procedures
and service calls.
-1-
376CAV
395CAV
Series H&J
SP04-63
10-00
A94086
A94085

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  • Page 1: Table Of Contents

    Blower Motor and Wheel............3 Cleaning Heat Exchanger ............5 Electrical Controls and Wiring..........6 WIRING DIAGRAMS..............9 Troubleshooting................9 EFFICIENCY RATING CERTIFIED A94086 Fig. 2—Model 376CAV Downflow CERTIFIED ® REGISTERED QUALITY SYSTEM A94087 Fig. 1—Model 376CAV Horizontal A94085 SAFETY CONSIDERATIONS Fig. 3—Model 395CAV Uplfow Installing and servicing heating equipment can be hazardous due to gas and electrical components.

  • Page 2: Introduction

    Recognize safety information. This is the safety-alert symbol a furnace, follow items 1. through 5. before bringing the When you see this symbol on the furnace and in instructions or control or yourself into contact with the furnace. Put all manuals, be alert to the potential for personal injury.

  • Page 3: Blower Motor And Wheel

    FLUE COLLAR BLOCKED MOUNTING VENT SCREWS SAFEGUARD PRESSURE RELIEF SWITCH FLUE COLLECTOR AIRFLOW VALVE CONTROL A94307 FILTER Fig. 4—Horizontal Filter Arrangement RETAINER WASHABLE AIRFLOW FILTER INSTALLATION POSITION A99284 OF FILTERS Fig. 6—Model 395CAV Upflow RETURN-AIR c. Slide filter out of cabinet. PLENUM d.
  • Page 4 VALVE SWITCHES NOTE: Refer to Table 1 for motor speed lead relocation if leads were not identified before disconnection A99285 TABLE 1—SPEED SELECTOR Fig. 7—Model 376CAV Downflow FACTORY- b. Remove internal vent pipe enclosure cover. COLOR SPEED ATTACHED c. Disconnect and remove short piece of vent pipe from within furnace.

  • Page 5: Cleaning Heat Exchanger

    13 32 11 32 " " WARNING: Blower access door switch opens 115-v BURNER power to control center. No component operation can occur. Caution must be taken when manually closing this switch for service purposes. Failure to follow this warn- ing could result in electrical shock, personal injury, or death.

  • Page 6: Electrical Controls And Wiring

    17. Replace blower access door only. 18. Turn electrical power and gas to ON. 19. Set thermostat and check furnace for proper operation. 20. Verify blower airflow and speed changes between heating and cooling. 21. Check for gas leaks. WARNING: Never use a match or other open flame to check for gas leaks.

  • Page 7: Heating/Cooling Application Wiring Diagram

    FIELD 24-V WIRING FIELD 115-, 208/230-, 460-V WIRING FACTORY 24-V WIRING FACTORY 115-V WIRING NOTE 2 THERMOSTAT FIVE WIRE FIELD-SUPPLIED TERMINALS DISCONNECT THREE-WIRE HEATING-ONLY 208/230- OR BLOWER DOOR SWITCH 460-V THREE PHASE 208/230-V SINGLE PHASE AUXILIARY 115-V FIELD- J-BOX SUPPLIED NOTE 1 DISCONNECT CONDENSING...
  • Page 8 SCHEMATIC DIAGRAM (WHEN USED) (WHEN USED) TO 115VAC FIELD DISCONNECT NOTE #14 NOTE #11 (WHEN USED) (NATURAL GAS & PROPANE) BLOWER BVSS LGPS NOTE #9 NOTE #4 EQUIPMENT GROUND DELAY (NOT ON ALL MODELS) BLOWER OFF DELAY SPARE-2 MED LO SELECTION CHART HEAT MED HI...

  • Page 9: Wiring Diagrams

    b. Look into blower access door sight glass for current b. Remove blower access door. LED status. c. Manually close blower access door switch. NOTE: Leave blower access panel installed to maintain power to WARNING: Blower access door switch opens 115-v control to view current LED status.

  • Page 10: Component Test

    SERVICE If status code recall is needed, do not remove power or blower door. Briefly remove and then reconnect one main limit wire to display stored status code. LED CODE STATUS CONTINUOUS OFF - Check for 115VAC at L1 and L2, and 24VAC at SEC-1 and SEC-2.
  • Page 11 Troubleshooting Guide START Is red LED status light on? Is there 115v at L1 and L2? Is door switch closed? Close door switch and go to start. Is there 24v at SEC-1 and SEC-2? Is there 115v going to switch? Is circuit breaker closed? Replace control center.
  • Page 12 © 2000 Bryant Heating & Cooling Systems 7310 W. Morris St. Indianapolis, IN 46231 —12— Printed in U.S.A. SP0463 Catalog No. 5337-606...

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395cav

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