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Bryant 355MAV Installation, Start-up, And Operating Instructions Manual

NOTE: Read the entire instruction manual before starting the
installation.
This symbol
indicates a change since the last issue.
Index
DIMENSIONAL DRAWING........................................................3
SAFETY CONSIDERATIONS..................................................2-5
Clearances to Combustibles......................................................4
INTRODUCTION ..........................................................................5
APPLICATIONS ......................................................................5-12
General ......................................................................................5
Upflow Applications..............................................................5-8
Downflow Applications.........................................................8-9
LOCATION ............................................................................13-14
General ....................................................................................13
Low-Heat Only Installation ....................................................13
Hazardous Locations...............................................................14
INSTALLATION....................................................................14-16
Leveling Legs (If Desired) .....................................................14
Installation In Horizontal Applications.............................14-16
AIR DUCTS............................................................................16-19
General Requirements .......................................................16-17
Ductwork Acoustical Treatment.............................................17
Supply Air Connections..........................................................17
Return Air Connections ..........................................................17
Filter Arrangement..................................................................17
Bottom Closure Panel........................................................17-18
Gas Piping..........................................................................18-19
ELECTRICAL CONNECTIONS...........................................19-21
115-v Wiring...........................................................................19
24-v Wiring.............................................................................20
Accessories ........................................................................20-21
DIRECT VENTING ...............................................................21-31
Removal of Existing Furnaces from
Common Vent Systems.....................................................21
Combustion-Air and Vent Piping .....................................21-29
Concentric Vent and Combustion-Air Termination
Kit Installation ...................................................................29
Multiventing and Vent Terminations................................29-31
CONDENSATE DRAIN..............................................................31
General ....................................................................................31
installation, start-up,
and operating instructions
DELUXE 4-WAY MULTIPOISE
VARIABLE-CAPACITY DIRECT-VENT
CONDENSING GAS FURNACE
A93040
Page
—1—
Cancels: II 355M-40-9
As an ENERGY STAR®
Partner, Bryant Heating &
Cooling Systems has de-
termined that this product
REGISTERED QUALITY SYSTEM
meets
the
ENERGY
STAR® guidelines for en-
ergy efficiency.
HORIZONTAL
LEFT
AIRFLOW
Fig. 1—Multipoise Orientations
Application ..............................................................................31
Condensate Drain Protection ..................................................31
SEQUENCE OF OPERATION..............................................31-36
Single-Stage Thermostat and Two-Stage Heating
(Adaptive Mode)................................................................33-34
Two-Stage Thermostat and Two-Stage Heating....................34
Cooling Mode ....................................................................34-35
Thermidistat Mode..................................................................35
Super-Dehumidify Mode...................................................35-36
Continuous Blower Mode.......................................................36
Heat Pump...............................................................................36
Component Test ......................................................................36
START-UP PROCEDURES ..................................................36-45
General ....................................................................................36
Select Setup Switch Positions...........................................36-39
Prime Condensate Trap With Water ......................................39
Purge Gas Lines......................................................................39
Adjustments .......................................................................39-45
Set Gas Input Rate ............................................................39-42
Set Temperature Rise..............................................................42
Set Thermostat Heat Anticipator ......................................42-45
CHECK SAFETY CONTROLS ............................................45-46
355MAV
Series H
II 355M-40-10
12-02
ama
CERTIFIED
AIRFLOW
HORIZONTAL
RIGHT
AIRFLOW
AIRFLOW
A93041

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   Summary of Contents for Bryant 355MAV

  • Page 1

    CERTIFIED A93040 NOTE: Read the entire instruction manual before starting the As an ENERGY STAR® installation. Partner, Bryant Heating & Cooling Systems has de- This symbol indicates a change since the last issue. termined that this product REGISTERED QUALITY SYSTEM...

  • Page 2

    Check Primary Limit Control..........45 closets, utility rooms, crawlspaces, and garages. The furnace is Check Pressure Switch ............45-46 factory-shipped for use with natural gas. A C.S.A. listed gas CHECKLIST ................46 conversion kit is required to convert furnace for use with propane gas.

  • Page 3

    —3—...

  • Page 4: Clearances To Combustibles, Upflow, Downflow

    INSTALLATION This forced air furnace is equipped for use with natural gas at altitudes 0 - 10,000 ft (0 - 3,050m), except 140 size furnaces are only approved for altitudes 0 - 7,000 ft. (0 - 2,135m). An accessory kit, supplied by the manufacturer, shall be used to convert to propane gas use or may be required for some natural gas applications. This furnace is for indoor installation in a building constructed on site.

  • Page 5: Electrostatic Discharge (esd) Precautions, Introduction, Applications, General, Upflow Applications, Upflow

    Combustion-air pipe perforated disk assembly 1. Disconnect all power to the furnace. Multiple disconnects Condensate trap hole filler plug may be required. DO NOT TOUCH THE CONTROL OR Vent and combustion-air intake hole filler plug ANY WIRE CONNECTED TO THE CONTROL PRIOR TO DISCHARGING YOUR BODY’S ELECTROSTATIC CHARGE TO GROUND.

  • Page 6

    FURNACE BLOWER SHELF CONDENSATE DOOR TRAP FURNACE CONDENSATE DOOR FURNACE TRAP (INSIDE) FURNACE SIDE SIDE FIELD FIELD DRAIN DRAIN CONN CONN ALTERNATE DRAIN TUBE LOCATION SIDE VIEW FRONT VIEW END VIEW FRONT VIEW CONDENSATE TRAP DRAIN TUBE LOCATION HORIZONTAL DOWNFLOW AND ALTERNATE UPFLOW APPLICATIONS APPLICATIONS EXTERNAL UPFLOW APPLICATIONS...

  • Page 7

    PLUG PLUG COLLECTOR BOX COLLECTOR BOX DRAIN TUBE (BLUE DRAIN TUBE (BLUE & WHITE STRIPED) & WHITE STRIPED) COLLECTOR BOX COLLECTOR BOX TUBE (PINK) TUBE (PINK) COLLECTOR BOX TUBE (GREEN) COLLECTOR BOX INDUCER HOUSING DRAIN TUBE (GREEN) (MOLDED) DRAIN TUBE (BEHIND COLLECTOR BOX DRAIN TUBE) CONDENSATE...

  • Page 8: Downflow Applications, Downflow

    COLLECTOR BOX DRAIN TUBE (BLUE) COLLECTOR BOX PLUG TUBE (GREEN) PLUG COLLECTOR BOX TUBE (GREEN) COLLECTOR BOX DRAIN TUBE (BLUE) COLLECTOR BOX COLLECTOR BOX TUBE (PINK) TUBE (PINK) COLLECTOR BOX DRAIN TUBE (BLUE COLLECTOR BOX & WHITE STRIPED) DRAIN TUBE (BLUE &...

  • Page 9: Horizontal Left (supply-air Discharge) Applications, Upflow, Downflow

    (2.) Condensate Trap Located on Right Side of Casing 2. Extend collector box pressure tube (green label) which was previously connected to condensate trap relief port connec- (a.) Install drain tube coupling (factory-supplied in tion by splicing to small diameter tube (factory-supplied in loose parts bag) into collector box drain tube loose parts bag).

  • Page 10

    a. Install drain tube coupling (factory-supplied in loose C. Condensate Trap Field Drain Attachment parts bag) into collector box drain tube (blue label) Refer to Condensate Drain section for recommendations and which was previously connected to condensate trap. procedures. b. Connect large diameter drain tube and clamp (factory- D.

  • Page 11: Horizontal Right (supply-air Discharge) Applications

    COMBUSTION – AIR INTAKE VENT A 12-IN. MIN HORIZONTAL PIPE SECTION IS RECOMMENDED WITH SHORT (5 TO 8 FT) VENT SYSTEMS TO REDUCE EXCESSIVE CONDENSATE DROPLETS FROM EXITING THE VENT PIPE. 30 MIN WORK AREA ⁄ MANUAL SHUTOFF ACCESS OPENING GAS VALVE FOR TRAP DRAIN...

  • Page 12: Applications, Upflow, Downflow

    COLLECTOR BOX DRAIN TUBE (BLUE) COLLECTOR BOX TUBE (GREEN) PLUG COLLECTOR BOX TUBE (PINK) AUXILIARY "J" BOX RELOCATED HERE CONDENSATE TRAP COLLECTOR BOX DRAIN TUBE (BLUE AND WHITE STRIPED) INDUCER HOUSING DRAIN TUBE (VIOLET) COLLECTOR BOX EXTENSION TUBE A02289 Fig. 13—Horizontal Right Tube Configuration d.

  • Page 13: Location, General, Low-heat Only Installation, Upflow, Downflow

    LOCATION WARNING: Do not install furnace on its back. Safety I. GENERAL control operation will be adversely affected. Never con- nect return-air ducts to back of furnace. Failure to follow This furnace must this warning could result in fire, personal injury, or death. •...

  • Page 14: Furnace Location Relative To Cooling Equipment, Location, Hazardous Locations, Installation, Leveling Legs (if Desired)

    4. Adjust outside nut to provide desired height, and tighten CAUTION: The furnace can operate in the high-heat inside nut to secure arrangement. mode when certain fault conditions occur. The following NOTE: Bottom closure must be used when leveling legs are used. precautions should be taken: See Bottom Closure Panel section.

  • Page 15

    PLENUM OPENING FLOOR OPENING A96283 Fig. 19—Floor and Plenum Opening Dimensions FURNACE FURNACE (OR COIL CASING CD5 OR CK5 WHEN USED) COIL ASSEMBLY OR KCAKC COIL BOX COMBUSTIBLE FLOORING COMBUSTIBLE FLOORING DOWNFLOW SHEET METAL SUBBASE PLENUM SHEET METAL PLENUM FLOOR OPENING FLOOR OPENING...

  • Page 16: Installation, Air Ducts

    CAUTION: The entire length of furnace MUST be PERFORATED supported when furnace is used in a horizontal position to DISCHARGE DUCT FLANGE ensure proper draining. When suspended, bottom brace supports sides and center blower shelf. When unit is supported from the ground, blocks or pad should support sides and center blower shelf area.

  • Page 17: Ductwork Acoustical Treatment, Supply Air Connections, Return Air Connections, Filter Arrangement, Bottom Closure Panel, Airflow

    Secure ductwork with proper fasteners for type of ductwork used. DOWNFLOW AND HORIZONTAL FURNACES Seal supply- and return-duct connections to furnace with code The return-air duct must be connected to return-air opening approved tape or duct sealer. provided. DO NOT cut into casing sides or back to attach any Flexible connections should be used between ductwork and portion of return-air duct.

  • Page 18: Bottom Closure Panel, Gas Piping

    To remove bottom closure panel, perform following: 4. Reinstall front filler panel and screws. 1. Tilt or raise furnace and remove 2 screws holding front G. Gas Piping filler panel. (See Fig. 26.) Gas piping must be installed in accordance with national and local 2.

  • Page 19: Gas Piping, Electrical Connections, V Wiring

    WARNING: Use proper length of pipe to avoid stress on WARNING: Blower access door switch opens 115-v gas control manifold. Failure to follow this warning could power to furnace control. No component operation can result in a gas leak resulting in fire, explosion, personal occur.

  • Page 20: V Wiring, Accessories

    TABLE 4—ELECTRICAL DATA OPERATING VOLTS— MAXIMUM MINIMUM UNIT MAXIMUM WIRE MAXIMUM FUSE OR VOLTAGE RANGE HERTZ— UNIT WIRE SIZE LENGTH (FT)‡ CKT BKR AMPS** PHASE AMPS SIZE Maximum* Minimum* 042040 115—60—1 042060 115—60—1 042080 115—60—1 060080 115—60—1 13.8 060100 115—60—1 13.8 060120 115—60—1...

  • Page 21: Direct Venting, Removal Of Existing Furnaces From Common Vent Systems, Combustion-air And Vent Piping

    2. Humidifier (HUM) WARNING: DO NOT connect furnace control HUM Connect an accessory 24 VAC, 0.5 amp maximum humidi- terminal to HUM (humidifier) terminal on Thermidis- fier (if used) to the 1/4-in. male quick-connect HUM tat™, Zone Controller or similar device. See Thermidis- terminal and C -24V screw terminal on the control board tat™, Zone Controller, thermostat, or controller manufac-...

  • Page 22

    REV. 327971-101 ACRDJ PRINTED CIRCIUT BOARD TRAN PL12 HSI VS EAC-1 EAC-2 1 2 3 SEC-1 SEC-2 3-AMP FUSE 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 ACRDJ 1 2 3 7 8 7 8 7 8 7 8 OFF OFF OFF OFF PRINTED CIRCIUT BOARD...

  • Page 23

    COMMUNICATION CONTINUOUS FAN FUTURE CONNECTOR (CF) AIRFLOW APPLICATIONS MODEL PLUG SETUP SWITCHES CONNECTOR SW1 SETUP SWITCHES AND BLOWER OFF- DELAY AIR CONDITIONING (A/C) AIRFLOW SETUP SWITCHES HUMIDIFIER TERMINAL (24-VAC 0.5 AMP MAX. ACRDJ – AIR CONDITIONING RELAY DISABLE JUMPER 24-V THERMOSTAT TERMINALS FLASH UPGRADE...

  • Page 24

    Furnace combustion-air and vent pipe connections must be at- WARNING: Solvent cements are combustible. Keep tached as shown in Fig. 34. Combustion-air intake plug fitting and away from heat, sparks, and open flame. Use only in well inducer housing alternate vent cap may need to be relocated in ventilated areas.

  • Page 25

    NOTE: The minimum combustion-air and vent pipe length (each) EXAMPLE: for these furnaces is 5 ft. Short pipe lengths (5-8 ft) may discharge An 042080 size furnace located in Indianapolis, elevation water droplets. These droplets may be undesirable, and a 12-in. 650 ft above sea level, could be installed in an application minimum offset pipe section is recommended, as shown in Fig.

  • Page 26

    TABLE 7—MAXIMUM ALLOWABLE PIPE LENGTH (FT) NUMBER OF 90° ELBOWS UNIT TERMINATION PIPE DIAMETER ALTITUDE SIZE TYPE (IN.)* 1-1/2 2 Pipe or 2-In. 042040 Concentric 1-1/2 2 Pipe or 2-In. 042060 Concentric 1-1/2 042080 2 Pipe or 2-In. 060080 Concentric 0 to 2000 2 Pipe or 2-In.

  • Page 27

    TABLE 7—MAXIMUM ALLOWABLE PIPE LENGTH (FT) Continued NUMBER OF 90° ELBOWS UNIT TERMINATION PIPE DIAMETER ALTITUDE SIZE TYPE (IN.)* 1-1/2 2 Pipe or 2-In. 042040 Concentric 1-1/2 2 Pipe or 2-In. 042060 Concentric 1-1/2 042080 2 Pipe or 2-In. 6001 to 7000‡ 060080 Concentric 2 Pipe or 2-In.

  • Page 28

    a. Determine location of combustion-air intake pipe con- c. Install pipe support (factory-supplied in loose parts bag) nection to combustion-air intake housing as shown in into selected furnace casing vent pipe hole. Pipe support Fig. 34 for application. should be positioned to bottom of casing hole. b.

  • Page 29: Combustion-air And Vent Piping, Concentric Vent And Combustion-air Termination Kit Installation, Multiventing And Vent Terminations

    12. Support combustion-air and vent piping a minimum of d. Termination kit should be positioned where it will not be every 5 ft (3 ft for SDR-21 or -26 PVC) using perforated damaged by or subjected to foreign objects, such as metal hanging strap.

  • Page 30

    ROOF 18 MAXIMUM BRACKET COUPLING COMBUSTION VERTICAL SEPARATION VENT BETWEEN COMBUSTION AIR AND VENT 8 3 / 4 FOR 3 KIT 6 3 / 4 FOR 2 KIT MAINTAIN 12 IN. MINIMUM CLEARANCE ABOVE HIGHEST ANTICIPATED SNOW LEVEL. MAXIMUM OF 24 IN. ABOVE ROOF. A87224 Fig.

  • Page 31: Condensate Drain, General, Condensate Drain Protection, Sequence Of Operation

    TABLE 8—MAXIMUM ALLOWABLE EXPOSED VENT PIPE LENGTH (FT) WITH INSULATION IN WINTER DESIGN TEMPERATURE AMBIENT* WINTER DESIGN MAXIMUM PIPE INSULATION THICKNESS (IN.)† UNIT TEMPERATURE DIAMETER SIZE (°F) (IN.) 042040 042060 042080 060080 2-1/2 060100 2-1/2 2-1/2 060120 * Pipe length (ft) specified for maximum pipe lengths located in unconditioned spaces. Pipes located in unconditioned space cannot exceed total allowable pipe length as specified in Table 7.

  • Page 32

    A96128 Fig. 42—Rooftop Termination (Dimension "A" is Touching or 2-In. Maximum Separation) 1 MAXIMUM VENT (TYP) VENT COMBUSTION AIR VENT COMBUSTION VENT A93057 A93056 Fig. 44—Concentric Vent and Combustion-Air Side Fig. 43—Concentric Vent and Combustion-Air Roof Termination (Dimension "A" is Touching or Termination (Dimension "A"...

  • Page 33

    thermostat is still calling for gas heating. The amber LED light will flash code 12 during the 90-second period, after which the LED CONDENSATE TRAP will be ON continuous, as long as no faults are detected. After the 90-second period, the furnace will respond to the thermostat normally.

  • Page 34: Cooling Mode

    low-heat pressure switch LPS closes. When the high-heat pressure 9. Blower-Off delay- When the thermostat is satisfied, the R switch closes, inducer motor RPM is noted by the furnace control to W circuit is opened, de-energizing the gas valve GV-M, CPU before the 25-sec prepurge period begins.

  • Page 35: Thermidistat Mode, Cooling Mode, Super-dehumidify Mode

    When the thermostat is satisfied, the R-to-G-and-Y circuits low-cooling speed, and the R to G-and-Y1 circuit starts the are opened. The outdoor unit will stop, and furnace blower furnace blower motor BLWM on low-cooling airflow motor BLWM will continue operating at cooling airflow for which is the true on-board CF selection as shown in Fig.

  • Page 36: Continuous Blower Mode, Heat Pump, Component Test, Start-up Procedures, General, Select Setup Switch Positions

    c. Cooling off-delay-When the call for cooling is satis- will remain on at low-heat airflow for the selected blower-OFF delay period. At the end of the blower-OFF delay, the blower fied and there is a demand for dehumidification, the motor BLWM will shut OFF unless G is still energized, in which cooling blower-off delay is decreased from 90 seconds to case the blower motor BLWM will operate at continuous blower 5 seconds.

  • Page 37

    A00277 A00275 Fig. 52—Two-Stage Furnace with Single-Speed Heat Fig. 50—Two-Stage Furnace with Single-Speed Pump (Dual Fuel) Air Conditioner A00276 A00278 Fig. 51—Two-Stage Furnace with Two-Speed Fig. 53—Two-Stage Furnace with Two-Speed Heat Pump Air Conditioner (Dual Fuel) —37—...

  • Page 38

    A00281 Fig. 56—Two-Stage Thermostat With Two-Stage A00279 Furnace and Two-Speed Air Conditioner Fig. 54—Dual Fuel Thermostat with Two-Stage Furnace and Single-Speed Heat Pump See note 2 A02348 Fig. 57—Single-Stage Thermostat With Two-Stage Furnace and Two-Speed Air Conditioner A00280 Fig. 55—Dual Fuel Thermostat With Two-Stage Furnace and Two-Speed Heat Pump To set the desired cooling airflow: B.

  • Page 39: Prime Condensate Trap With Water, Purge Gas Lines, Adjustments

    C. Setup Switches (SW1) IV. PURGE GAS LINES The furnace control has 8 setup switches that may be set to meet the application requirements. Position these setup switches for the If not previously done, purge the lines after all connections have appropriate requirement.

  • Page 40

    e. Find closest natural gas heat value and specific gravity in c. Turn setup switch SW1-2 on control center to ON Table 11. position. (See Fig. 32.) This keeps furnace locked in low-heat operation. f. Follow heat value and specific gravity lines to point of intersection to find orifice size and low- and high-heat d.

  • Page 41

    TABLE 9—FURNACE SETUP SWITCH DESCRIPTION SETUP SWITCH NORMAL DESCRIPTION SWITCH NO. NAME POSITION OF USE Turn ON to retrieve up to 7 stored status codes for troubleshooting SW1-1 Status Code Recovery assistance when R thermostat lead is disconnected. Allows 2-stage operation with a single stage thermostat. Turn ON when using 2 stage thermostat to allow Low Heat opera- SW1-2 Adaptive Heat Mode...

  • Page 42: Set Temperature Rise, Set Thermostat Heat Anticipator

    2. When thermometer readings stabilize, subtract return-air EXAMPLE: (High-heat operation at 0—2000 ft altitude) temperature from supply-air temperature to determine air Furnace input from rating plate is 100,000 Btuh temperature rise. Btu heating input = Btu/cu ft X cu ft/hr NOTE: Temperature rise can be determined for low-heat opera- Heating value of gas = 975 Btu/cu ft tion by placing setup switch SW1-2 on furnace control in ON...

  • Page 43

    TABLE 11 - ORIFICE SIZE* AND MANIFOLD PRESSURES FOR GAS INPUT RATE (TABULATED DATA BASED ON 20,000 BTUH HIGH-HEAT / 13,000 BTUH LOW-HEAT PER BURNER, DERATED 2%/1000 FT ABOVE SEA LEVEL) ALTITUDE AVG. GAS SPECIFIC GRAVITY OF NATURAL GAS RANGE HEAT VALUE 0.58 0.60...

  • Page 44

    TABLE 11 - ORIFICE SIZE* AND MANIFOLD PRESSURES FOR GAS INPUT RATE (TABULATED DATA BASED ON 20,000 BTUH HIGH-HEAT / 13,000 BTUH LOW-HEAT PER BURNER, DERATED 2%/1000 FT ABOVE SEA LEVEL) ALTITUDE AVG. GAS SPECIFIC GRAVITY OF NATURAL GAS RANGE HEAT VALUE 0.58 0.60...

  • Page 45: Start-up Procedures, Adjustments, Check Safety Controls

    Fig. 65 illustrates an easy method of obtaining thermostat amp CHECK SAFETY CONTROLS draw measurements. The amp reading should be taken after blower This section covers the safety controls that must be checked before motor has started and furnace is operating in low-heat. the installation is complete.

  • Page 46

    switch is closed. If either a status code 31 or 32 is flashed 6. Reconnect inducer motor wire harness. Reinstall furnace when inducer motor is disconnected, the furnace will shut access door. itself down immediately. Determine the reason pressure 7. Turn on 115-v power to furnace. switches did not function properly and correct the condi- 8.

  • Page 47

    CHECKLIST—INSTALLATION LOAD CALCULATION Condensate Drain ____________ Heating Load (Btuh) ________ Unit Level or Pitched Forward ____________ Cooling Load (Btuh) Internal Tubing Connections Free of Kinks ________ and Traps ____________ Furnace Model Selection External Drain Connection Leak Tight and COMBUSTION AND VENT PIPING ________ Sloped Termination Location...

  • Page 48

    © 2002 Bryant Heating & Cooling Systems 7310 W. Morris St. Indianapolis, IN 46231 —48— Printed in U.S.A. 355m4010 Catalog No. 5335-516...

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