Bryant 352MAV Installation, Start-Up, And Operating Instructions Manual
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Bryant 352MAV Installation, Start-Up, And Operating Instructions Manual

Bryant 352MAV Installation, Start-Up, And Operating Instructions Manual

Series b, 2-stage, direct vent condensing gas furnace
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See also: User's Information Manual , 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.

TABLE OF CONTENTS

Safety Considerations.....................................................................2
Introduction ....................................................................................2
Codes and Standards ......................................................................5
Safety.........................................................................................5
General Installation...................................................................5
Combustion and Ventilation Air ..............................................5
Duct Systems ............................................................................5
Acoustical Lining and Fibrous Glass Duct..............................5
Gas Piping and Gas Pipe Pressure Testing..............................5
Electrical Connections ..............................................................5
Applications....................................................................................5
General ......................................................................................5
Upflow Applications.................................................................6
Orientation) ..........................................................................6
Orientation) ..........................................................................6
Orientation) ..........................................................................7
Condensate Trap Field Drain Attachment ..........................7
Pressure Switch Tubing.......................................................7
Drain Connections ...............................................................8
Condensate Trap Freeze Protection ....................................8
Downflow Applications ............................................................8
Condensate Trap Location ..................................................8
Condensate Trap Tubing .....................................................8
Condensate Trap Field Drain Attachment ..........................9
Pressure Switch Tubing.......................................................9
Condensate Trap Freeze Protection ....................................9
Applications ..............................................................................9
installation, start-up,
and operating instructions
2-STAGE, DIRECT VENT
CONDENSING GAS FURNACE
A93040
-1-
Cancels: II 352M-60-1
Condensate Trap Location ..................................................9
Condensate Trap Tubing .....................................................9
Pressure Switch Tubing.....................................................10
Condensate Trap Freeze Protection ..................................10
Construct a Working Platform ..........................................10
Condensate Trap Location ................................................11
Condensate Trap Tubing ...................................................11
Condensate Trap Field Drain Attachment ........................12
Pressure Switch Tubing.....................................................12
Condensate Trap Freeze Protection ..................................12
Construct a Working Platform ..........................................12
Location ........................................................................................12
General ....................................................................................12
Equipment ...............................................................................13
Hazardous Locations...............................................................13
Installation ....................................................................................13
Leveling Legs (If Desired) .....................................................13
Applications ............................................................................14
Installation in Horizontal Applications ..................................14
Air Ducts.................................................................................16
General Requirements .......................................................16
Ductwork Acoustical Treatment .......................................16
Supply Air Connections ....................................................16
Return Air Connections.....................................................17
Filter Arrangement..................................................................17
Bottom Closure Panel.............................................................17
Gas Piping...............................................................................18
Electrical Connections ............................................................19
115-V Wiring.....................................................................19
24-V Wiring.......................................................................20
Accessories ........................................................................20
Direct Venting.........................................................................21
Systems ..............................................................................21
Combustion-Air and Vent Piping .....................................24
Kit Installation ...................................................................29
Multiventing and Vent Terminations................................32
Condensate Drain....................................................................32
General...............................................................................32
Application.........................................................................33
Condensation Drain Protection .........................................33
Start-Up Adjustment and Safety Check ......................................33
General ....................................................................................33
Sequence of Operation............................................................34
(Adaptive Mode)................................................................34
(Non-Adaptive Heating Mode) .........................................36
Cooling Mode ....................................................................37
Continuous Blower Mode .................................................39
Thermidistat Mode ............................................................00
352MAV
Series B
II 352M-60-2
6-02

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  • Page 1: Table Of Contents

    352MAV and operating instructions Series B 2-STAGE, DIRECT VENT CONDENSING GAS FURNACE Cancels: II 352M-60-1 II 352M-60-2 6-02 NOTE: Read the entire instruction manual before starting the Condensate Trap Location ..........9 installation. Condensate Trap Tubing .............9 This symbol → indicates a change since the last issue.

  • Page 2: Safety Considerations

    DOWNFLOW or operation AIRFLOW AIRFLOW INTRODUCTION The model 352MAV, 2-Stage, 4-way multipoise, Gas-Fired, Cat- egory IV, direct vent condensing furnace is available in model AIRFLOW sizes ranging in input capacities (high-stage) of 60,000 to 120,000 A93041 Btuh. This furnace is C.S.A. design-certified for natural and Fig.
  • Page 3 ⁄ " ⁄ " ⁄ ⁄ " " AIRFLOW ⁄ ⁄ " " ⁄ " ⁄ " ⁄ " ⁄ 19" " " " 2-IN. COMBUSTION- ⁄ " CONDENSATE DRAIN AIR CONN OUTLET OUTLET TRAP LOCATION (DOWNFLOW & CONDENSATE DRAIN 2-IN.
  • Page 4 A02148 → Fig. 3—Clearances to Combustibles is used. The design of the 352MAV furnace is not C.S.A. certified 6. The furnace is not to be used for temporary heating of for installation in mobile homes, recreational vehicles, or outdoors. buildings or structures under construction.

  • Page 5: Codes And Standards

    This furnace is shipped with the drain and pressure tubes con- • CANADA: Part 7 of the NSCNGPIC, Venting Systems and Air nected for UPFLOW applications. Minor modifications are re- Supply for Appliances quired when used in DOWNFLOW, HORIZONTAL RIGHT, IV.

  • Page 6: Upflow Applications

    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: Condensate Trap Location (Alternate Upflow Orientation)

    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 COLLECTOR BOX TUBE (GREEN) TUBE (GREEN) COLLECTOR BOX DRAIN TUBE (BLUE) INDUCER HOUSING (MOLDED) DRAIN TUBE (BEHIND COLLECTOR BOX...

  • Page 8: Upper Collector Box And Inducer Housing (Unused) Drain Connections

    G. Upper Collector Box and Inducer Housing (Unused) Drain Connections 1. Upper collector box drain connection Attached to the UPPER collector box drain connection is a factory-installed corrugated, plugged tube (blue and white PLUG striped label). This tube is plugged to prevent condensate leakage in this application.

  • Page 9: Condensate Trap Field Drain Attachment

    (c.) Route extended collector box drain tube di- 5. Route this extended tube (pink label) to condensate trap relief port connection. rectly from collector box drain to condensate trap as shown in Fig. 9. 6. Determine appropriate length, cut, and connect tube. (d.) Determine appropriate length and cut.

  • Page 10: Condensate Trap Field Drain Attachments

    PLUG COLLECTOR BOX AUXILIARY "J" BOX DRAIN TUBE (BLUE AND WHITE STRIPED) CONDENSATE COLLECTOR BOX TRAP TUBE (GREEN) INDUCER HOUSING COLLECTOR DRAIN TUBE (VIOLET) BOX EXTENSION COLLECTOR BOX DRAIN TUBE DRAIN TUBE (BLUE) COLLECTOR BOX EXTENSION TUBE DRAIN TUBE COUPLING COLLECTOR BOX TUBE (PINK) RELOCATE TUBE BETWEEN BLOWER SHELF AND INDUCER HOUSING FOR 040, 060, AND 080 HEATING INPUT FURNACES...

  • Page 11: Condensate Trap Location

    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. WORK AREA ″ ⁄ MANUAL SHUTOFF ACCESS OPENING GAS VALVE FOR TRAP DRAIN...

  • Page 12: Condensate Trap Field Drain Attachment

    COLLECTOR BOX DRAIN TUBE (BLUE) COLLECTOR BOX TUBE (GREEN) COLLECTOR BOX EXTENSION TUBE PLUG COLLECTOR BOX TUBE (PINK) AUXILARY “J” BOX RELOCATED HERE CONDENSATE TRAP COLLECTOR BOX DRAIN TUBE (BLUE AND WHITE STRIPED) INDUCER HOUSING DRAIN TUBE (VIOLET) COLLECTOR BOX EXTENSION TUBE A01028 Fig.

  • Page 13: Furnace Location Relative To Cooling Equipment

    WARNING: Do not install furnace on its back. (See Fig. 14.) Safety control operation will be adversely affected. Never connect return-air ducts to back of furnace. Failure to follow this warning could result in fire, personal injury, or death. LEVEL (0″) FRONT FRONT ⁄...

  • Page 14: Installation In Upflow And Downflow Applications

    ″ ⁄ ″ ⁄ ″ ⁄ PLENUM OPENING ″ ⁄ FLOOR OPENING ″ ⁄ ″ ⁄ ″ ⁄ ″ ⁄ A96283 A89014 Fig. 18—Floor and Plenum Opening Dimensions Fig. 17—Leveling Legs FURNACE (OR COIL CASING WHEN USED) NOTE: The maximum length of bolt should not exceed 1-1/2 in. 1.
  • Page 15 TABLE 1—OPENING DIMENSIONS (IN.) FURNACE PLENUM OPENING FLOOR OPENING CASING APPLICATION WIDTH Upflow Applications 24–1/8 16–5/8 24–3/4 Downflow Applications on Non-Combustible Flooring 15-7/8 16-1/2 19-5/8 Downflow Applications on Combustible Flooring Using KGASB Subbase 15-1/8 16-3/4 20-3/8 Furnace with or without CD5 or CK5 Coil Assembly or 17-1/2 KCAKC Coil Box Downflow Applications on Combustible Flooring NOT Using...

  • Page 16: Air Ducts

    ⁄ -IN. ROD ANGLE ″ ⁄ IRON OR EQUIVALENT ALTERNATE SUPPORT LOCATION 4-IN. MIN 8-IN. MAX DRAIN (A) ROD LOCATION USING DIMPLE LOCATORS -IN. MAX (SEE DIMENSIONAL -IN. HEX NUT ALTERNATE SUPPORT DWG FOR & WASHER (4) LOCATION FROM BACK REQD PER ROD LOCATIONS) NOTES:...

  • Page 17: Return Air Connections

    to furnace supply-/outlet-air duct flanges or air conditioning coil TABLE 2—FILTER INFORMATION casing (when used). DO NOT cut main furnace casing to attach AIR FILTER LOCATED IN BLOWER COMPARTMENT supply side air duct, humidifier, or other accessories. All accesso- FURNACE ries MUST be connected external to furnace main casing.

  • Page 18: Gas Piping

    ⁄ Gas supply line should be a separate line running directly from -IN. WIDE CASINGS ONLY: meter to furnace, if possible. Refer to Table 3 for recommended INSTALL FIELD-SUPPLIED gas pipe sizing. FILTER FILLER STRIP UNDER FILTER. TABLE 3—MAXIMUM CAPACITY OF PIPE* 3 ″...

  • Page 19: Electrical Connections

    WARNING: Blower access door switch opens 115-v power to furnace control. No component operation can SUPPLY occur. Do not bypass or close switch with panel removed. MANUAL Failure to follow this warning could result in personal SHUTOFF VALVE injury or death. (REQUIRED) SEDIMENT →...

  • Page 20: 24-V Wiring

    FIELD 24-V WIRING FIELD 115-, 208/230-, 460-V WIRING FACTORY 24-V WIRING FACTORY 115-V WIRING 1-STAGE THERMOSTAT TERMINALS FIVE FIELD-SUPPLIED WIRE FUSED DISCONNECT TWO-WIRE 208/230- OR HEATING- 460-V ONLY THREE PHASE 208/230-V W/W1 SINGLE PHASE Y/Y2 115-V FUSED JUNCTION DISCONNECT SWITCH CONTROL CONDENSING (WHEN REQUIRED)

  • Page 21: Direct Venting

    A93033 Fig. 29—Disconnect Switch and Furnace IX. DIRECT VENTING The 352MAV furnaces require a dedicated (one 352MAV furnace only) direct-vent system. In a direct-vent system, all air for combustion is taken directly from outside atmosphere, and all flue products are discharged to outside atmosphere.
  • Page 22 SCHEMATIC DIAGRAM TO 115VAC FIELD-DISCONNECT SWITCH CONNECTION DIAGRAM FUSE OR CIRCUIT NOTE #2 (NATURAL GAS & PROPANE) BREAKER & DISCONNECT CAP-2 SWITCH (WHEN REQ’D) EQUIPMENT GROUND NEUTRAL L1 NOTE #2 GRN/YEL IHI/LOR NOTE #3 NOTE #11 GRN/YEL (WHEN USED) LGPS HSIR 1 2 3 4 SELECT CHART...
  • Page 23 TABLE 5—APPROVED COMBUSTION-AIR AND VENT PIPE, FITTING AND CEMENT MATERIALS ASTM SPECIFICATION MATERIAL PIPE FITTINGS SOLVENT CEMENT AND PRIMERS DESCRIPTION (MARKED ON MATERIAL) D1527 Pipe — — Schedule-40 D1785 Pipe — — Schedule-40 Solvent D2235 For ABS — — For ABS Cement D2241 Pipe...

  • Page 24: Combustion-Air And Vent Piping

    NOT IN HORIZONTAL NOTES: SECTION 1. If installing 2 adjacent 352MAV Furnaces, refer to Multiventing and Vent Terminations section for proper vent configurations. 2. When locating combustion-air and vent terminations, consideration must be PIPE DIAMETER given to prevailing winds, location, and other conditions which may cause TRANSITION IN recirculation of the appliance’s own flue products or the flue products of...
  • Page 25 NOTE: Select 1 vent pipe connection and NOTE: Select 1 vent pipe connection and 1 combustion-air pipe connection. 1 combustion-air pipe connection. FLOW COMBUSTION- COMBUSTION- VENT VENT VENT VENT COMBUSTION- COMBUSTION- FLOW UPFLOW DOWNFLOW COMBUSTION- COMBUSTION- VENT VENT FLOW FLOW HORIZONTAL-LEFT DISCHARGE HORIZONTAL-RIGHT DISCHARGE A96187...
  • Page 26 12 ″ MIN 12 ″ MIN VENT PIPE VENT PIPE COMBUSTION-AIR PIPE COMBUSTION-AIR PIPE HORIZONTAL TO ROOF HORIZONTAL TO SIDEWALL COMBUSTION-AIR PIPE VENT PIPE COMBUSTION-AIR PIPE 12 ″ MIN 12 ″ MIN VENT PIPE VERTICAL TO ROOF VERTICAL TO SIDEWALL NOTE: A 12 In.
  • Page 27 TABLE 7—MAXIMUM ALLOWABLE PIPE LENGTH (FT) NUMBER OF 90° ELBOWS TERMINATION PIPE DIA ALTITUDE (FT) UNIT SIZE TYPE (IN.)* 1-1/2 2 Pipe or 2-in 036060 Concentric 1-1/2 036080 2 Pipe or 2-in 048080 Concentric 2-1/2 0 to 2000 048100 2 Pipe or 3-in 2-1/2 060100 Concentric...
  • Page 28 TABLE 7-MAXIMUM ALLOWABLE PIPE LENGTH (FT) (CONTINUED) NUMBER OF 90° ELBOWS TERMINATION PIPE DIA ALTITUDE (FT) UNIT SIZE TYPE (IN.)* 1-1/2 2 Pipe or 2-in 036060 Concentric 036080 2 Pipe or 2-in 048080 Concentric 2-1/2 4001 to 5000‡ 2-1/2 048100 2 Pipe or 3-in 060100 Concentric...

  • Page 29: Concentric Vent And Combustion-Air Termination Kit Installation

    TABLE 7—MAXIMUM ALLOWABLE PIPE LENGTH (FT) (CONTINUED) NUMBER OF 90° ELBOWS TERMINATION PIPE DIA ALTITUDE (FT) UNIT SIZE TYPE (IN.)* 1-1/2 2 Pipe or 2-in 036060 Concentric 036080 2 Pipe or 2-in 048080 Concentric 2-1/2 8001 to 9000‡ 2-1/2 048100 2 Pipe or 3-in 060100 Concentric...
  • Page 30 OVERHANG OR ROOF ROOF 18″ MAXIMUM BRACKET 12″ MINIMUM VENT COUPLING COMBUSTION VERTICAL SEPARATION VENT BETWEEN COMBUSTION AIR AND VENT 8 3 / 4 ″ FOR 3″ KIT 90° 6 3 / 4 ″ FOR 2″ KIT BRACKET MAINTAIN 12 IN. MINIMUM CLEARANCE ABOVE HIGHEST ANTICIPATED SNOW LEVEL.
  • Page 31 TABLE 8—MAXIMUM ALLOWABLE EXPOSED VENT PIPE LENGTH (FT) WITH AND WITHOUT INSULATIONIN WINTER DESIGN TEMPERATURE AMBIENT* WINTER DESIGN MAX PIPE UNIT WITHOUT WITH 3/8–IN. OR TEMPERATURE DIAMETER SIZE INSULATION THICKER INSULATION† (°F) (IN.) * 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: Multiventing And Vent Terminations

    6. Check required dimensions as shown in Fig. 38 or 39. D. Multiventing and Vent Terminations When 2 or more 352MAV furnaces are vented near each other, each furnace must be individually vented. NEVER common vent or breach vent 352MAV furnaces. When 2 or more 352MAV...

  • Page 33: Application

    B. Application C. Condensation Drain Protection The furnace, A/C, and humidifier drains may be combined and Freezing condensate left in condensate trap and drain line may drained together. The A/C drain must have an external, field- cause cracks, and possible water damage may occur. If freeze supplied trap prior to the furnace drain connection.

  • Page 34: Sequence Of Operation

    TABLE 9A—FURNACE SETUP SWITCH DESCRIPTION SETUP DESCRIPTION SWITCH NORMAL SWITCH NAME POSITION Allows 2-stage operation with a single-stage thermostat when connected between R to W2. Adaptive Turn on when using 2-stage SW-1 Heat thermostat to allow Low Heat Mode operation when R to W/W1 closes OPEN STAND and High Heat operation when PIPE FOR...
  • Page 35 A00277 A00275 → Fig. 50C—Two-Stage Furnace with Single-Speed Fig. 50A—Two-Stage Furnace with Single-Speed Air Heat Pump (Dual Fuel) Conditioner A00276 A00278 → → Fig. 50B—Two-Stage Furnace with Two-Speed Fig. 50D—Two-Stage Furnace with Two-Speed Air Conditioner Heat Pump (Dual Fuel) —35—...
  • Page 36 A00281 → Fig. 50G—Two-Stage Thermostat With Two-Stage Furnace A00279 and Two-Speed Air Conditioner Fig. 50E—Dual Fuel Thermostat with Two-Stage Furnace and Single-Speed Heat Pump A00282 Fig. 50H—Single-Stage Thermostat With Two-Stage Furnace and Two-Speed Air Conditioner A00280 Fig. 50F—Dual Fuel Thermostat With Two-Stage Furnace and Two-Speed Heat Pump furnace control CPU begins a 15-second prepurge period.

  • Page 37: Two-Stage Heating With Two-Stage Thermostat (Non-Adaptive Heating Mode)

    furnace control CPU begins the blower-ON delay period 8. Blower-Off delay- When the thermostat is satisfied, the R and continues to hold the gas valve GV-M open. If the to W circuit is opened, de-energizing the gas valve GV-M, burner flame is not proved within two seconds, the control stopping gas flow to the burners, and de-energizing the CPU will close the gas valve GV-M, and the control CPU humidifier terminal HUM.

  • Page 38: Cooling Mode

    2. Switching From High- To Low- Heat- If the thermostat R NOTE: When transitioning from low-cooling to high-cooling the to W2 circuit opens, and the R to W1 circuit remains closed, outdoor unit compressor will shut down for 1 minute while the the furnace control CPU will switch the inducer motor IDM BLWM continues to run at low-cool speed (same speed as speed from high to low.

  • Page 39: Continuous Blower Mode

    E. Continuous Blower Mode period. If the R to W/W1-and-Y/Y2 or R to W/W1-and-Y1-and- Y/Y2 signals disappear, leaving the G signal, the blower motor When the R to G circuit is closed by the thermostat, the blower BLWM will remain on for the selected blower-OFF delay period motor BLWM will operate on continuous-blower speed (can be set then switch to continuous-blower speed.

  • Page 40: Prime Condensate Trap With Water

    Obtain average yearly specific gravity from local gas supplier. c. Verify furnace model and size. Table 10 can only be used for model 352MAV furnaces with heating inputs of 20,000/13,000 (High/Low) Btuh per burner. d. Find installation altitude in Table 10.
  • Page 41 TABLE 10—MODEL 352MAV ORIFICE SIZE AND HIGH/LOW-HEAT MANIFOLD PRESSURE FOR CORRECT INPUT FOR USE WITH 060 THROUGH 120 SIZE FURNACES ONLY (TABULATED DATA BASED ON 20,000/13,000 BTUH PER BURNER, DERATED 2 PERCENT FOR EACH 1000 FT ABOVE SEA LEVEL)* SPECIFIC GRAVITY OF NATURAL GAS...
  • Page 42 TABLE 10—MODEL 352MAV ORIFICE SIZE AND HIGH/LOW-HEAT MANIFOLD PRESSURE FOR CORRECT INPUT (CONT.) FOR USE WITH 060 THROUGH 120 SIZE FURNACES ONLY (TABULATED DATA BASED ON 20,000/13,000 BTUH PER BURNER, DERATED 2 PERCENT FOR EACH 1000 FT ABOVE SEA LEVEL)*...
  • Page 43 TABLE 10—MODEL 352MAV ORIFICE SIZE AND HIGH/LOW-HEAT MANIFOLD PRESSURE FOR CORRECT INPUT (CONT.) FOR USE WITH 060 THROUGH 120 SIZE FURNACES ONLY (TABULATED DATA BASED ON 20,000/13,000 BTUH PER BURNER, DERATED 2 PERCENT FOR EACH 1000 FT ABOVE SEA LEVEL)*...
  • Page 44 LOW-FIRE ON/OFF EXAMPLE: ADJUSTMENT SWITCH ALLEN SCREW 100,000 Btuh input furnace installed at 4300 ft. (UNDER CAP) Derate Furnace Input Rate Furnace Input Rate Multiplier at Installation HIGH-FIRE ADJUSTMENT at Sea Level Factor Altitude ALLEN SCREW 100,000 0.91 91,000 INLET (UNDER CAP) PRESSURE TABLE 11—ALTITUDE DERATE MULTIPLIER FOR U.S.A.

  • Page 45: Set Temperature Rise

    CAUTION: To avoid operation outside the rated rise EXAMPLE: (0-2000 ft altitude) range: Furnace input from rating plate is 100,000 Btuh. 1. NEVER connect Low Speed (Red) wire to ″HI Btu heating input = Btu/cu ft X cu ft/hr -HEAT″. Heating value of gas = 975 Btu/cu ft 2.

  • Page 46: Adjust Blower Off Delay (Heat Mode)

    By using this 8. Leave literature packet near furnace. © 2002 Bryant Heating & Cooling Systems 7310 W. Morris St. Indianapolis, IN 46231 —46— Printed in U.S.A.
  • Page 47 CHECKLIST—INSTALLATION LOAD CALCULATION Condensate Drain _______ Heating Load (Btuh) _______ Unit Level or Pitched Forward Internal Tubing Connections Free _______ Cooling Load (Btuh) _______ of Kinks and Traps External Drain Connection Leak _______ Furnace Model Selection _______ Tight and Sloped Condensate Trap Primed before _______ COMBUSTION AND VENT PIPING...
  • Page 48 © 2002 Bryant Heating & Cooling Systems 7310 W. Morris St. Indianapolis, IN 46231 —48— Printed in U.S.A. 352m602 Catalog No. 5335–204...

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