Bryant 340MAV manual

NOTE: Read the entire instruction manual before starting the installation. This symbol → indicates a change since the last issue. Index Page DIMENSIONAL DRAWING ........................................................3 SAFETY CONSIDERATIONS ..................................................1-2 Clearances to Combustibles...........................[...]

WARNING: Improper installation, adjustment, alter- ation, service, maintenance, or use can cause carbon monoxide poisoning, explosion, fire, electrical shock, or other conditions which may cause personal injury or property damage. Consult a qualified installer, service agency, local gas supplier, or your distributor or branch for information or ass[...]

Fig. 2—Dimensional Drawing DIMENSIONS (IN.) UNIT SIZE A D E 024040 17-1/2 15-7/8 16 036040 17-1/2 15-7/8 16 024060 17-1/2 15-7/8 16 036060 17-1/2 15-7/8 16 048060 17-1/2 15-7/8 16 036080 17-1/2 15-7/8 16 048080 17-1/2 15-7/8 16 060080 21 19-3/8 19-1/2 048100 21 19-3/8 19-1/2 060100 21 19-3/8 19-1/2 060120 24-1/2 22-7/8 23 060140 24-1/2 22-7/8 23 [...]

These furnaces are shipped with the following materials to assist in proper furnace installation. These materials are shipped in the main blower compartment. Installer Packet includes: Installation, Startup, and Operating Instructions Service and Maintenance Instructions User’s Information Manual Warranty Certificate Loose Parts Bag includes: Qua[...]

VII. ELECTRICAL CONNECTIONS • US: National Electrical Code (NEC) ANSI/NFPA 70-2002 • CANADA: Canadian Electrical Code CSA C22.1 ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS CAUTION: Electrostatic discharge can affect electronic components. Take precautions during furnace installation and servicing to protect the furnace electronic control. Precaut[...]

4. If you touch ungrounded objects (and recharge your body with static electricity), firmly touch a clean, unpainted metal surface of the furnace again before touching control or wires. 5. Use this procedure for installed and uninstalled (un- grounded) furnaces. 6. Before removing a new control from its container, dis- charge your body’s electros[...]

desired furnace side for field drain attachment. See Condensate Trap Tubing (Factory-Shipped Orientation) section for drain tube extension details. (See Fig. 5.) B. Condensate Trap Tubing (Factory-Shipped Orientation) NOTE: See Fig. 6 or tube routing label on main furnace door to confirm location of these tubes. 1. Collector Box Drain, Inducer Hous[...]

H. Condensate Trap Freeze Protection Refer to Condensate Drain Protection section for recommenda- tions and procedures. III. DOWNFLOW APPLICATIONS A downflow furnace application is where furnace blower is located above combustion and controls section of furnace, and conditioned air is discharged downwards. A. Condensate Trap Location The condensate[...]

a. Remove factory-installed cap and clamp from LOWER inducer housing drain connection. b. Remove and discard UPPER (molded) inducer housing drain tube which was previously connected to conden- sate trap. c. Install cap and clamp on UPPER inducer housing drain connection where molded drain tube was removed. d. Use inducer housing drain tube (violet [...]

IV. HORIZONTAL LEFT (SUPPLY-AIR DISCHARGE) APPLICATIONS A horizontal left furnace application is where furnace blower is located to the right of combustion and controls section of furnace, and conditioned air is discharged to the left. NOTE: The auxiliary junction box (J-Box) MUST be relocated to opposite side of furnace casing. (See Fig. 10.) See [...]

Fig. 11—Attic Location and Working Platform A93031 COMBUSTION – AIR INTAKE VENT MANUAL SHUTOFF GAS VALVE SEDIMENT TRAP CONDENSATE TRAP DRAIN ACCESS OPENING FOR TRAP 30 ″ MIN WORK AREA 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. 5 3 [...]

A. Condensate Trap Location The condensate trap must be removed from the factory-installed blower shelf location and relocated in selected application location as shown in Fig. 2 or 12. To relocate condensate trap from the blower shelf to desired location, perform the following: 1. Remove 3 tubes connected to condensate trap. 2. Remove trap from bl[...]

NOTE: For upflow/downflow applications install furnace so that it is level or pitched forward within 1/2-in. for proper furnace operation. For horizontal applications pitch 1/4-in. minimum to 1/2-in. maximum forward to ensure proper condensate drainage from secondary heat exchangers. (See Fig. 13.) When a furnace is installed so that supply ducts c[...]

III. HAZARDOUS LOCATIONS INSTALLATION I. LEVELING LEGS (IF DESIRED) When furnace is used in upflow position with side inlet(s), leveling legs may be desired. (See Fig. 17.) Install field-supplied, corrosion-resistant 5/16-in. machine bolts and nuts. NOTE: The maximum length of bolt should not exceed 1-1/2 in. 1. Position furnace on its back. Locate[...]

TABLE 1—OPENING DIMENSIONS (IN.) FURNACE CASING WIDTH APPLICATION PLENUM OPENING FLOOR OPENING AB C D 17-1/2 Upflow Applications 16 24-1/8 16-5/8 24-3/4 Downflow Applications on Non-Combustible Flooring 15-7/8 19 16-1/2 19-5/8 Downflow Applications on Combustible Flooring Using KGASB Subbase Furnace with or without CD5 or CK5 Coil Assembly or KCA[...]

Air Conditioning Contractors National Association (SMACNA) or American Society of Heating, Refrigerating and Air Conditioning Engineers (ASHRAE) or consult The Air Systems Design Guide- lines reference tables available from your local distributor. The duct system should be sized to handle the required system design CFM at the design static pressure[...]

if constructed and installed in accordance with the latest edition of SMACNA construction standard on fibrous glass ducts. Both acoustical lining and fibrous ductwork shall comply with NFPA 90B as tested by UL Standard 181 for Class 1 Rigid air ducts. III. SUPPLY AIR CONNECTIONS A. Upflow Furnaces Connect supply-air duct to 3/4-in. flange on furnac[...]

VI. BOTTOM CLOSURE PANEL These furnaces are shipped with bottom enclosure panel installed in bottom return-air opening. This panel MUST be in place when side return air is used. To remove bottom closure panel, perform following: 1. Tilt or raise furnace and remove 2 screws holding front filler panel. (See Fig. 25.) 2. Rotate front filler panel down[...]

CAUTION: If a flexible connector is required or al- lowed by authority having jurisdiction, black iron pipe shall be installed at furnace gas valve and extend a minimum of 2 in. outside furnace casing. Failure to follow this caution will result in intermittent unit opera- tion or performance satisfaction. If local codes allow the use of a flexible [...]

Field-supplied wiring shall conform with the limitations of 63°F (35°C) rise. WARNING: Blower access panel door switch opens 115-v power to control center. No component operation can occur. Do not bypass or close switch with panel removed. Failure to follow this warning could result in personal injury or death. CAUTION: Furnace control must be gr[...]

Fig. 30—Wiring Diagram A02271 PCB TRAN FRS NOTE #11 LS PRS (WHE N USED) LGPS FUSED OR CIRCUIT BREAKER DI SCONNEC T SWI TCH ( WHEN REQ’D) NOTE #2 JB L1 L1 BLWR TO 115V AC FIELD DISCONNECT NOTE #2 EQUIP MENT GROUND SP ARE- 1 HEAT COOL HSIR EAC-1 START OL HI MED HI MED L O LO BLW M SCHEMATI C DI AGRAM (NA TUR AL G AS & PR OP ANE) 1 1 HSI 2 PL3[...]

NOTE: DO NOT connect furnace control HUM terminal to HUM (humidifier) terminal on Thermidistat™, Zone Controller or simi- lar device. See Thermidistat™, Zone Controller, thermostat, or controller manufacturer’s instructions for proper connection. 2. Humidifier (HUM) A quick-connect terminal (HUM) and screw terminal (C OM 24-v) are provided fo[...]

Fig. 31—Control Center A02100 BL W NUETRAL ST A TUS CODE LED SEC-2 SEC-1 EAC-2 L2 FUSE 3-AMP 0.5 AMP@24V AC HUM TEST/TWIN G Com W Y R 24V 120 180 90 150 BLOWER OFF-DELA Y PL T 1 COOL HEA T SP ARE-1 SP ARE-2 EAC-1 1-AMP@ 115V AC PR-1 L1 PL2 1 24-V THERMOST A T TERMINALS 3-AMP FUSE LED OPERA TION & DIA GNOSTIC LIGHT 115-V AC(L2)NEUTRAL CONNECTI[...]

and Canada. In Canada construct all combustion-air and vent pipes for this unit of CSA or ULC listed schedule-40 PVC, PVC-DWV or ABS-DWV pipe and pipe cement. SDR pipe is NOT approved in Canada. See Table 7 for maximum pipe lengths and Fig. 36, 37, 38, 39, and 40 for exterior piping arrangements. NOTE: Furnace combustion-air and vent pipe connectio[...]

NOTE: The minimum combustion-air and vent pipe length (each) for these furnaces is 5 ft. Short pipe lengths (5-8 ft) may discharge water droplets. These droplets may be undesirable, and a 12-in. minimum offset pipe section is recommended, as shown in Fig. 34, to reduce excessive droplets from exiting vent pipe outlet. B. Combustion-Air and Vent Pip[...]

d. Install pipe support (factory-supplied in loose parts bag) into selected furnace casing combustion-air pipe hole. Pipe support should be positioned at bottom of casing hole. e. Insert 2-in. diameter pipe into intake housing. NOTE: A 2-in. diameter pipe must be used within the furnace casing. Make all pipe diameter transitions outside furnace cas[...]

TABLE 7—MAXIMUM ALLOWABLE PIPE LENGTH (FT) ALTITUDE (FT) UNIT SIZE TERMINATION TYPE PIPE DIA (IN.)* NUMBER OF 90° ELBOWS 1 23456 0 to 2000 024040 036040 2 Pipe or 2-in Concentric 1 5 NA NA NA NA NA 1-1/2 70 70 65 60 60 55 2 7 0 7 07 07 07 07 0 024060 036060 048060 2 Pipe or 2-in Concentric 1-1/2 20 15 10 5 NA NA 2 7 0 7 07 07 07 07 0 036080 0480[...]

TABLE 7—MAXIMUM ALLOWABLE PIPE LENGTH (FT) (CONTINUED) ALTITUDE (FT) UNIT SIZE TERMINATION TYPE PIPE DIA (IN.)* NUMBER OF 90° ELBOWS 1 2 3456 4001 to 5000‡ 024040 036040 2 Pipe or 2-in Concentric 1-1/2 60 55 50 45 44 39 2 7 0 7 0 7 07 07 07 0 024060 036060 048060 2 Pipe or 2-in Concentric 1-1/2 15 10 5 NA NA NA 2 6 4 5 9 5 85 35 25 2 036080 04[...]

b. Reposition elastometric (rubber) inducer housing outlet cap and clamp to appropriate unused inducer housing connection. Tighten clamp. WARNING: Inducer housing outlet cap must be in- stalled and fully seated against inducer housing. Clamp must be tightened to prevent any condensate leakage. Failure to follow this warning could result in electric[...]

fully into inducer housing connection until it bottoms on the internal stop. Tighten both clamps to secure the pipe to inducer housing. Tighten the clamp screws to 15 in.-lb. of torque. e. Install casing hole filler cap (factory-supplied in loose parts bag) in unused vent pipe casing hole. VENT EXTENSION PIPE Some furnaces are supplied with a PVC v[...]

5. Check required dimensions as shown in Fig. 36, 39, or 40. C. Concentric Vent/Air Termination Kit 1. Determine location for termination. Consideration of the following should be made when determining an appropriate location for termination kit. a. Comply with all clearance requirements as stated in Table 5. b. Termination kit should be positioned[...]

Fig. 39—Sidewall Termination of 12 in. or More A87225 MAINTAIN 12 IN. CLEARANCE ABOVE HIGHEST ANTICIPATED SNOW LEVEL OR GRADE, WHICHEVER IS GREATER. 90 ° VENT 12 IN. SEPARATION BETWEEN BOTTOM OF COMBUSTION AIR AND BOTTOM OF VENT BRACKET COMBUSTION-AIR 12 ″ MINIMUM OVERHANG OR ROOF Fig. 37—Concentric Vent and Combustion-Air Roof Termination ([...]

Fig. 44—Sidewall Termination of 12 in. or Less (Dimension "A" is Touching or 2-In. Maximum Separation) A96129 A COMBUSTION AIR COMBUSTION AIR VENT Fig. 42—Concentric Vent and Combustion-Air Roof Termination (Dimension "A" is Touching or 2-In. Maximum Separation) A93056 COMBUSTION AIR VENT VENT A Fig. 41—Rooftop Termination[...]

It is important that vent terminations be made as shown to avoid recirculation of flue gases. Dimension "A" in Fig. 41, 42, 43, 44, and 45 represents distance between pipes or rain shields, as touching or 2-in. maximum separation. CONDENSATE DRAIN I. GENERAL Condensate trap is shipped installed in the blower shelf and factory connected fo[...]

SEQUENCE OF OPERATION CAUTION: Furnace control must be grounded for proper operation, or control will lock out. Control is grounded through green/yellow wire routed to gas valve and burner box screw. Failure to follow this caution will result in intermittent unit operation. Using schematic diagram, follow sequence of operation through different mod[...]

Control initiates a 90-sec blower only on period before starting another heat pump cycle if there is a power interruption. Anytime control senses false flame, control locks out of heating mode. This reaction occurs because control ignores W input due to false flame signal and, as a result, sees only Y input and goes into cooling mode blower off del[...]

1. Determine natural gas orifice size and manifold pressure for correct input. a. Obtain average gas heat value (at installed altitude) from local gas supplier. b. Obtain average gas specific gravity from local gas supplier. c. Verify furnace model and size. Table 9 can only be used for model 340MAV furnaces with heating sizes of 040 through 120. T[...]

TABLE 9—MODEL 340MAV ORIFICE SIZE AND MANIFOLD PRESSURE FOR CORRECT INPUT FOR USE WITH 040 THROUGH 120 SIZE FURNACES ONLY (TABULATED DATA BASED ON 20,000 BTUH PER BURNER, DERATED 2% FOR EACH 1000 FT ABOVE SEA LEVEL) ALTITUDE RANGE (FT) AVG GAS HEAT VALUE AT ALTITUDE (BTU/CU FT) SPECIFIC GRAVITY OF NATURAL GAS 0.58 0.60 0.62 0.64 0.66 Orifice No. [...]

TABLE 9—MODEL 340MAV ORIFICE SIZE AND MANIFOLD PRESSURE FOR CORRECT INPUT (Continued) FOR USE WITH 040 THROUGH 120 SIZE FURNACES ONLY (TABULATED DATA BASED ON 20,000 BTUH PER BURNER, DERATED 2% FOR EACH 1000 FT ABOVE SEA LEVEL) ALTITUDE RANGE (FT) AVG GAS HEAT VALUE AT ALTITUDE (BTU/CU FT) SPECIFIC GRAVITY OF NATURAL GAS 0.58 0.60 0.62 0.64 0.66 [...]

TABLE 9—MODEL 340MAV ORIFICE SIZE AND MANIFOLD PRESSURE FOR CORRECT INPUT (Continued) FOR USE WITH 040 THROUGH 120 SIZE FURNACES ONLY (TABULATED DATA BASED ON 20,000 BTUH PER BURNER, DERATED 2% FOR EACH 1000 FT ABOVE SEA LEVEL) ALTITUDE RANGE (FT) AVG GAS HEAT VALUE AT ALTITUDE (BTU/CU FT) SPECIFIC GRAVITY OF NATURAL GAS 0.58 0.60 0.62 0.64 0.66 [...]

TABLE 10—MODEL 340MAV ORIFICE SIZE AND MANIFOLD PRESSURE FOR CORRECT INPUT FOR USE WITH 140 SIZE FURNACES ONLY (TABULATED DATA BASED ON 23,000 BTUH PER BURNER, DERATED 2% FOR EACH 1000 FT ABOVE SEA LEVEL) ALTITUDE RANGE (FT) AVG GAS HEAT VALUE AT ALTITUDE (BTU/CU FT) SPECIFIC GRAVITY OF NATURAL GAS 0.58 0.60 0.62 0.64 0.66 Orifice No. Manifold Pr[...]

TABLE 10—MODEL 340MAV ORIFICE SIZE AND MANIFOLD PRESSURE FOR CORRECT INPUT (Continued) FOR USE WITH 140 SIZE FURNACES ONLY (TABULATED DATA BASED ON 23,000 BTUH PER BURNER, DERATED 2% FOR EACH 1000 FT ABOVE SEA LEVEL) ALTITUDE RANGE (FT) AVG GAS HEAT VALUE AT ALTITUDE (BTU/CU FT) SPECIFIC GRAVITY OF NATURAL GAS 0.58 0.60 0.62 0.64 0.66 Orifice No.[...]

EXAMPLE: (0—2000 ft altitude using Table 9) Heating value = 1050 Btu/cu ft Specific gravity = 0.62 Therefore: Orifice No. 45 Manifold pressure 3.6-in. wc * Furnace is shipped with No. 45 orifices. In this example all main burner orifices are the correct size and do not need to be changed to obtain the proper input rate. Check and verify burner or[...]

EXAMPLE: (0—2000 ft altitude) Furnace input from rating plate is 100,000 Btuh. Btu heating input = Btu/cu ft X cu ft/hr Heating value of gas = 975 Btu/cu ft Time for 1 revolution of 2-cu ft dial = 70 sec Gas rate = 103 cu ft/hr (from Table 12) Btu heating input = 103 X 975 = 100,425 Btuh In this example, the orifice size and manifold pressure adj[...]

I. CHECK PRIMARY LIMIT CONTROL This control shuts off gas control system and energizes air- circulating blower motor if furnace overheats. Recommended method of checking this limit control is to gradually block off return air after furnace has been operating for a period of at least 5 minutes. As soon as limit control has shut off burners, return-a[...]

CHECKLIST—INSTALLATION LOAD CALCULATION ____________ Heating Load (Btuh) ____________ Cooling Load (Btuh) ____________ Furnace Model Selection COMBUSTION AIR VENT PIPING Termination Location ________ Roof or Sidewall ________ Termination Kit-2 Pipe or Concentric ________ Combustion-Air Pipe Length ________ Combustion-Air Elbow Quantity ________ V[...]

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© 2003 Bryant Heating & Cooling Systems 7310 W. Morris St. Indianapolis, IN 46231 —48— Printed in U.S.A. 340m4011 Catalog No. 5334-016[...]