Bryant 345MAV Installation, Start-Up, And Operating Instructions Manual
  1. Manuals
  2. Brands
  3. Bryant Manuals
  4. Furnace
  5. 345MAV
  6. Installation, start-up, and operating instructions manual
Bryant 345MAV Installation, Start-Up, And Operating Instructions Manual

Bryant 345MAV Installation, Start-Up, And Operating Instructions Manual

4-way multipoise fixed-capacity condensing gas furnace series b
Hide thumbs Also See for 345MAV:
Table of Contents

Advertisement

Quick Links

See also: User's Information Manual , Installation, Start-up, and Operating Instructions Manual
DIMENSIONAL DRAWING........................................................2
SAFETY CONSIDERATIONS .....................................................3
Clearances to Combustibles......................................................3
INTRODUCTION ..........................................................................4
APPLICATIONS ......................................................................4-11
General ......................................................................................4
Upflow Applications..............................................................4-7
Downflow Applications.........................................................7-8
LOCATION ............................................................................11-13
General...............................................................................11-12
Hazardous Locations...............................................................13
General ....................................................................................13
Unconfined Space ...................................................................13
Confined Space..................................................................13-14
INSTALLATION....................................................................14-19
Leveling Legs (If Desired)................................................14-15
Installation On a Concrete Slab .............................................15
Applications)......................................................................15
Installation In Horizontal Applications ..................................16
Air Ducts............................................................................16-17
Filter Arrangement..................................................................17
Bottom Closure Panel........................................................17-18
Gas Piping..........................................................................18-19
ELECTRICAL CONNECTIONS...........................................19-22
115-v Wiring......................................................................20-21
24-v Wiring.............................................................................22
Accessories..............................................................................22
VENTING ...............................................................................22-29
Common Vent Systems................................................22-23
Combustion-Air and Vent Piping...........................................29
Vent Termination ....................................................................29
Multiventing ............................................................................29
CONDENSATE DRAIN ........................................................29-31
General ....................................................................................29
installation, start-up,
and operating instructions
4-WAY MULTIPOISE
FIXED-CAPACITY
CONDENSING GAS FURNACE
A93040
Page
-1-
Cancels: II 345M-40-2
®
As an ENERGY STAR®
Partner, BRYANT Heat-
ing & Cooling Systems
Company has determined
REGISTERED QUALITY SYSTEM
that this product meets the
ENERGY STAR® guide-
lines for energy efficiency.
UPFLOW
HORIZONTAL
LEFT
DOWNFLOW
AIRFLOW
Fig. 1-Multipoise Orientations
Application ..............................................................................29
Condensate Drain Protection.............................................29-31
SEQUENCE OF OPERATION..............................................31-32
Heating Mode..........................................................................31
Cooling Mode .........................................................................31
Continuous Blower Mode.......................................................31
Heat Pump Mode ....................................................................31
Component Test ......................................................................32
START-UP PROCEDURES ..................................................32-38
General ....................................................................................32
Prime Condensate Trap With Water.................................32-33
Purge Gas Lines......................................................................33
Adjustments .......................................................................33-38
Set Gas Input Rate ............................................................33-38
Set Temperature Rise..............................................................38
Blower Off Delay (Heat Mode) .............................................38
Set Thermostat Heat Anticipator............................................38
CHECK SAFETY CONTROLS..................................................39
Check Primary Limit Control.................................................39
Check Pressure Switch ...........................................................39
CHECKLIST...........................................................................39-40
345MAV
Series B
II 345M-40-3
5-99
ama
A PP R O VED
R
AIRFLOW
HORIZONTAL
RIGHT
AIRFLOW
AIRFLOW
A93041

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the 345MAV and is the answer not in the manual?

Questions and answers

Related Manuals for Bryant 345MAV

Summary of Contents for Bryant 345MAV

  • Page 1: Table Of Contents

    5-99 ® A PP R O VED A93040 As an ENERGY STAR® NOTE: Read the entire instruction manual before starting the Partner, BRYANT Heat- ing & Cooling Systems installation. Company has determined REGISTERED QUALITY SYSTEM that this product meets the...

  • Page 2: Note: Read The Entire Instruction Manual Before Starting The Installation. Index Page Dimensional Drawing

    —2—...

  • Page 3: Safety Considerations

    SAFETY CONSIDERATIONS identify unsafe practices which would result in minor personal injury or product and property damage. NOTE is used to highlight Installing and servicing heating equipment can be hazardous due to suggestions which will result in enhanced installation, reliability, gas and electrical components.

  • Page 4: Introduction

    recharges your body with static electricity (for example; DO Before installing the furnace in Canada, refer to the NOT move or shuffle your feet, DO NOT touch un- NSCNGPIC. Contact Standard Sales, CSA International, 178 grounded objects, etc.). Rexdale Boulevard, Etobicoke, (Toronto) Ontario, Canada M9W 1R3.
  • Page 5 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 6 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 INDUCER HOUSING DRAIN TUBE (BLUE) (MOLDED) DRAIN TUBE (BEHIND COLLECTOR BOX...

  • Page 7: Downflow Applications

    NOTE: See Fig. 5 or 6 or tube routing label on main furnace door a. Remove factory-installed plug from LOWER collector to check for proper connections. box drain tube (blue and white striped label). b. Install removed clamp and plug into UPPER collector H.

  • Page 8: Horizontal Left (Supply-Air Discharge) Applications

    b. Remove and discard UPPER (molded) inducer housing CAUTION: Local codes may require a drain pan under drain tube which was previously connected to conden- entire furnace and condensate trap when a condensing sate trap. furnace is used in an attic application or over a finished c.

  • Page 9: Horizontal Right (Supply-Air Discharge) Applications

    C. Condensate Trap Field Drain Attachment CAUTION: The condensate trap MUST be installed Refer to Condensate Drain section for recommendations and below furnace. See Fig. 4 for dimensions. The drain procedures. connection to condensate trap must also be properly sloped to an open drain. D.
  • Page 10 A 3-IN. MINIMUM CLEARANCE VENT TO COMBUSTION-AIR INTAKE IS REQUIRED. COMBUSTION–AIR INTAKE 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-IN. MIN WORK AREA ⁄...

  • Page 11: Location

    COLLECTOR BOX DRAIN TUBE (BLUE) COLLECTOR BOX TUBE (GREEN) COLLECTOR BOX EXTENSION TUBE PLUG COLLECTOR BOX TUBE (PINK) CONDENSATE TRAP COLLECTOR BOX DRAIN TUBE (BLUE AND WHITE STRIPED) INDUCER HOUSING DRAIN TUBE (VIOLET) COLLECTOR BOX EXTENSION TUBE A93303 Fig. 11—Horizontal Right Tube Configuration 3.

  • Page 12: Furnace Location Relative To Cooling Equipment

    FRONT °F °F RETURN 32 F MINIMUM INSTALLED AMBIENT OR FREEZE PROTECTION REQUIRED MAX 85°F MIN 55°F A93042 NOTE: These furnaces are designed for a minimum continuous return-air temperature of 60°F or intermittent operation down to 55°F such as when used with a night setback thermostat. Return-air temperature must not exceed a maximum of 85°F.

  • Page 13: Hazardous Locations

    III. HAZARDOUS LOCATIONS For Example: MINIMUM FLOOR AREA FOR UNCONFINED SPACE 345MAV Furnace Minimum Sq Ft With Input Btuh 7-1/2 Ft Ceiling 40,000 60,000 80,000 100,000 120,000 If the unconfined space is of unusually tight construction, air for combustion and ventilation MUST come from either the outdoors or spaces freely communicating with the outdoors.

  • Page 14: Installation

    1 SQ IN. PER 4000 DUCTS BTUH * OUTDOORS SUPPLY VENT THROUGH ROOF OR SIDEWALL 12 MAX 1 SQ IN. VENT PER 2000 THROUGH SUPPLY BTUH * ROOF 12 MAX 1 SQ IN. SIDEWALL PER 4000 BTUH * 1 SQ IN. PER 1000 BTUH * IN DOOR OR WALL...

  • Page 15: Installation On A Concrete Slab

    ⁄ ⁄ ⁄ ⁄ HOLE IN FLOOR ⁄ ⁄ ⁄ ⁄ A73382 A89014 OPENING DIMENSIONS (IN.) Fig. 14—Leveling Legs FURNACE CASING WIDTH Heat Only Heat/Cool* 3. Install another nut on other side of furnace base. (Install flat washer if desired.) 17-1/2 16-7/16 19-5/8...

  • Page 16: Installation In Horizontal Applications

    V. AIR DUCTS PERFORATED A. General Requirements DISCHARGE DUCT FLANGE The duct system should be designed and sized according to accepted national standards such as those published by: Air Conditioning Contractors Association (ACCA), Sheet Metal and Air Conditioning Contractors National Association (SMACNA) or American Society of Heating, Refrigerating and Air Conditioning Engineers (ASHRAE).

  • Page 17: Air Ducts

    D. Return Air Connections TABLE 1—FILTER INFORMATION FURNACE 1. Upflow Furnaces FILTER SIZE (IN.)* FILTER TYPE CASING FRAMED The return-air duct must be connected to bottom, sides (left or Side Return Bottom Return WIDTH (IN.) right), or a combination of bottom and side(s) of main furnace 17-1/2 (1) 16 X 25 X 1†...

  • Page 18: Gas Piping

    WASHABLE FILTER FILTER RETAINER BOTTOM CLOSURE PANEL FRONT FILLER A93045 PANEL Fig. 20—Filter Installed for Side Inlet A93047 Fig. 22—Removing Bottom Closure Panel ⁄ -IN. WIDE ⁄ -IN. WIDE CASINGS ONLY: CASINGS ONLY: CUT AND FOLD INSTALL FIELD-SUPPLIED FACTORY-PROVIDED FILTER FILLER STRIP FILTERS AS SHOWN VIII.

  • Page 19: Installation

    TABLE 2—MAXIMUM CAPACITY OF PIPE CAUTION: If a flexible connector is required or al- (CU FT PER HR)* lowed by authority having jurisdiction, black iron pipe NOMINAL shall be installed at gas valve and extend a minimum of LENGTH OF PIPE (FT) IRON INTERNAL 2 in.

  • Page 20: 115-V Wiring

    TABLE 3—ELECTRICAL DATA OPERATING VOLTS— UNIT UNIT MAX WIRE MAX FUSE OR VOLTAGE RANGE HERTZ— UNIT WIRE SIZE AMPACITY† LENGTH (FT)‡ CKT BKR AMPS** PHASE AMPS SIZE Max* Min* 024040 115—60—1 036040 115—60—1 10.0 024060 115—60—1 036060 115—60—1 048060 115—60—1 12.8 036080 115—60—1...
  • Page 21 TRAN —21—...

  • Page 22: 24-V Wiring

    II. 24-V WIRING I. REMOVAL OF EXISTING FURNACES FROM COMMON VENT SYSTEMS Make field 24-v thermostat connections at 24-v terminal block on control center. For proper cooling operation, Y wire from thermo- If furnace being replaced was connected to a common vent system stat MUST be connected to Y terminal on control center, as shown with other appliances, the following steps shall be followed with in Fig.
  • Page 23 7. If improper venting is observed during any of above tests, b. Determine length of straight portion of combustion-air the venting system must be corrected. inlet pipe from table in Fig. 29. Vent system or vent connectors may need to be resized. For any c.
  • Page 24 FIELD-SUPPLIED 2-IN. DIAMETER FIELD-SUPPLIED PVC 90 ELBOW 2-IN. DIAMETER PVC PIPE FURNACE NOT IN HORIZONTAL SECTION PIPE DIAMETER TRANSITION IN VERTICAL SECTION COMBUSTION-AIR DISC A93034 (FACTORY-SUPPLIED IN LOOSE PARTS BAG) Fig. 31—Vent Pipe Diameter Transition Location and A96211 Elbow Configuration LENGTH OF STRAIGHT PIPE PORTION OF Determine vent pipe diameter and maximum pipe lengths using COMBUSTION-AIR INLET PIPE ASSEMBLY (IN.)
  • Page 25 TABLE 4—MAXIMUM ALLOWABLE VENT PIPE LENGTH (FT) NUMBER OF 90° ELBOWS VENT PIPE ALTITUDE (FT) UNIT SIZE DIAMETER (IN.) 024040 1-1/2 036040 024060 1-1/2 036060 048060 1-1/2 036080 0 to 2000 048080 060080 2-1/2 048100 2-1/2 060100 2-1/2 060120 NUMBER OF 90° ELBOWS VENT PIPE ALTITUDE (FT) UNIT SIZE...
  • Page 26 TABLE 4—MAXIMUM ALLOWABLE VENT PIPE LENGTH (FT) Continued NUMBER OF 90° ELBOWS VENT PIPE ALTITUDE (FT) UNIT SIZE DIAMETER (IN.) 1-1/2 024040 036040 024060 1-1/2 036060 048060 5001 to 6000† 036080 048080 2-1/2 060080 2-1/2 048100 060100 060120 NUMBER OF 90° ELBOWS VENT PIPE ALTITUDE (FT) UNIT SIZE...
  • Page 27 TABLE 4—MAXIMUM ALLOWABLE VENT PIPE LENGTH (FT) Continued NUMBER OF 90° ELBOWS VENT PIPE ALTITUDE (FT) UNIT SIZE DIAMETER (IN.) 1-1/2 024040 036040 024060 036060 048060 9001 to 10,000† 036080 048080 2-1/2 060080 2-1/2 048100 060100 060120 * Wide radius elbow. †...
  • Page 28 TABLE 5—MAXIMUM ALLOWABLE EXPOSED VENT PIPE LENGTH (FT) WITH INSULATION IN 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 4.

  • Page 29: Combustion-Air And Vent Piping

    15. Slope vent pipe toward furnace a minimum of 1/4 in. per TABLE 6—VENT PIPE linear ft with no sags between hangers. TERMINATION CLEARANCES CLEARANCE (FT) 16. Use appropriate methods to seal openings where vent pipe LOCATION passes through roof or sidewall. U.S.A.
  • Page 30 ROOF VENT MAINTAIN 12-IN. MINIMUM CLEARANCE ABOVE HIGHEST ANTICIPATED SNOW LEVEL. 32 F MINIMUM INSTALLED MAXIMUM OF 24 IN. ABOVE ROOF. AMBIENT OR FREEZE A96191 PROTECTION REQUIRED Fig. 33—Roof Termination (Preferred) OVERHANG OR ROOF 12 MINIMUM VENT A93058 CAUTION: Unit must not be installed, operated, and then turned off and left in an unoccupied structure during cold weather when temperature drops to 32°F and below unless drain trap and drain line have adequate freeze...

  • Page 31: Sequence Of Operation

    4. Wrap field drain pipe with remaining heat tape, approxi- 5. Blower on delay—Sixty sec after burner flame is proven, mately 1 wrap per ft. blower motor is energized on heating speed. Simulta- neously, electronic air cleaner terminal EAC-1 is energized. 5.

  • Page 32: Component Test

    V. COMPONENT TEST WARNING: Blower access panel door switch opens 115-v power to control center. No component operation A. Component Test Sequence can occur. Caution must be taken when manually closing NOTE: All components are functionally operated except the gas this switch for service purposes.

  • Page 33: Purge Gas Lines

    A99118 A99119 Fig. 38—Inducer Housing Drain Tube Fig. 39—Filling Condensate Trap 5. Remove funnel and tube from inducer housing and replace d. Find installation altitude in Table 7. drain connection cap and clamp. NOTE: For Canada altitudes of 2000 to 4500 ft, use U.S.A. III.
  • Page 34 TABLE 7—MODEL 345MAV ORIFICE SIZE AND MANIFOLD PRESSURE FOR CORRECT INPUT (TABULATED DATA BASED ON 20,000 BTUH PER BURNER, DERATED 2% FOR EACH 1000 FT ABOVE SEA LEVEL) * SPECIFIC GRAVITY OF NATURAL GAS AVG GAS ALTITUDE HEAT VALUE 0.58 0.60 0.62 0.64...
  • Page 35 TABLE 7—MODEL 345MAV ORIFICE SIZE AND MANIFOLD PRESSURE FOR CORRECT INPUT Continued (TABULATED DATA BASED ON 20,000 BTUH PER BURNER, DERATED 2% FOR EACH 1000 FT ABOVE SEA LEVEL) * SPECIFIC GRAVITY OF NATURAL GAS AVG GAS ALTITUDE HEAT VALUE 0.58 0.60 0.62...
  • Page 36 TABLE 7—MODEL 345MAV ORIFICE SIZE AND MANIFOLD PRESSURE FOR CORRECT INPUT Continued (TABULATED DATA BASED ON 20,000 BTUH PER BURNER, DERATED 2% FOR EACH 1000 FT ABOVE SEA LEVEL) * SPECIFIC GRAVITY OF NATURAL GAS AVG GAS ALTITUDE HEAT VALUE 0.58 0.60 0.62...
  • Page 37 ON AND OFF SWITCH PRESSURE REGULATOR ADJUSTMENT BURNER ENCLOSURE REFERENCE PRESSURE BURNER ORIFICE INLET PRESSURE TAP MANIFOLD PRESSURE TAP A93059 CAUTION: DO NOT redrill orifices. Improper drilling A95622 (burrs, out-of-round holes, etc.) can cause excessive Fig. 40—Redundant Automatic Gas Valve burner noise and misdirection of burner flames.

  • Page 38: Adjustments

    c. Measure time (in sec) for gas meter test dial to complete 2. When thermometer readings stabilize, subtract return-air temperature from supply-air temperature to determine air 1 revolution. temperature rise. d. Refer to Table 9 for cu ft of gas per hr. 3.

  • Page 39: Check Safety Controls

    CHECK SAFETY CONTROLS flashes a 31 fault. If hot surface ignitor glows when inducer motor is disconnected, shut furnace down immediately. I. CHECK PRIMARY LIMIT CONTROL Determine reason pressure switch did not function properly This control shuts off combustion control system and energizes and correct condition.
  • Page 40 Cycle Rate (3 Cycles per Hr) Se- ________ lected Safety Controls Check Operation ________ Primary Limit ________ Pressure Switch © 1999 Bryant Heating & Cooling Systems 7310 W. Morris St. Indianapolis, IN 46231 —40— Printed in U.S.A. 345m403 Catalog No. 5334-505...

Table of Contents

Save PDF