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

Series f deluxe 4-way multipoise variable-capacity direct-vent condensing gas furnace installation, start-up, and operating instructions

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Installation, start-up, and operating instructions manual (52 pages)

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Installation, Start-up, and Operating Instructions

Deluxe 4-Way Multipoise

Variable-Capacity Direct-Vent

Condensing Gas Furnace

CERTIFIED

REGISTERED QUALITY SYSTEM

NOTE: Read the entire instruction manual before starting the installation.

SAFETY CONSIDERATIONS.....................................................................................................................................................................................3

INTRODUCTION..........................................................................................................................................................................................................3

CODES AND STANDARDS .......................................................................................................................................................................................3

ELECTROSTATIC DISCHARGE (ESD) PRECAUTION PROCEDURE ................................................................................................................6

APPLICATIONS ...........................................................................................................................................................................................................6

General......................................................................................................................................................................................................................6

Upflow Applications ...........................................................................................................................................................................................7

Condensate Trap Location (Factory-Shipped Orientation) ..........................................................................................................................7

Condensate Trap Tubing (Factory-Shipped Orientation) .............................................................................................................................7

Condensate Trap Location (Alternate Upflow Orientation).........................................................................................................................7

Condensate Trap Tubing (Alternate Upflow Orientation) ...........................................................................................................................8

Condensate Trap Field Drain Attachment ....................................................................................................................................................9

Pressure Switch Tubing.................................................................................................................................................................................9

Upper Collector Box and Inducer Housing (Unused) Drain Connections ..................................................................................................9

Condensate Trap Freeze Protection ..............................................................................................................................................................9

Downflow Applications............................................................................................................................................................................9

Condensate Trap Location.............................................................................................................................................................................9

Condensate Trap Tubing .............................................................................................................................................................................10

Condensate Trap Field Drain Attachment ..................................................................................................................................................11

Pressure Switch Tubing...............................................................................................................................................................................11

Condensate Trap Freeze Protection ............................................................................................................................................................11

Horizontal Left (Supply-Air Discharge) Applications ..........................................................................................................................11

Condensate Trap Location...........................................................................................................................................................................11

Condensate Trap Tubing .............................................................................................................................................................................11

Condensate Trap Field Drain Attachments.................................................................................................................................................12

Pressure Switch Tubing...............................................................................................................................................................................12

Condensate Trap Freeze Protection ............................................................................................................................................................12

Construct a Working Platform ....................................................................................................................................................................12

Horizontal Right (Supply-Air Discharge) Applications........................................................................................................................13

Condensate Trap Location...........................................................................................................................................................................13

Condensate Trap Tubing .............................................................................................................................................................................13

Condensate Trap Field Drain Attachment ..................................................................................................................................................14

Pressure Switch Tubing...............................................................................................................................................................................14

Condensate Trap Freeze Protection ............................................................................................................................................................15

Construct a Working Platform ....................................................................................................................................................................15

Form: II 355M-40-11

ama

Cancels: New

As an ENERGY STAR

Partner, Bryant Heating

& Cooling Systems has

determined that this

p r o d u c t m e e t s t h e

ENERGY STAR

guidlines

for energy efficiency.

Printed in U.S.A.

03-02

355MAV

Series F

Catalog No. 5335-518

Table of Contents

Summary of Contents for Bryant 355MAV

Page 1: Table Of Contents
Series F Condensing Gas Furnace CERTIFIED ® As an ENERGY STAR ® Partner, Bryant Heating & Cooling Systems has determined that this p r o d u c t m e e t s t h e ENERGY STAR ®...
Page 2 LOCATION..........................................15 General ............................................15 Low-Fire Only Installation .....................................17 Furnace Location Relative to CoolingEquipment..............................17 Hazardous Locations.......................................18 INSTALLATION .........................................18 Leveling Legs (If Desired) .....................................18 Installation in Upflow and Downflow Applications..............................18 Installation in Horizontal Applications ..................................21 Air Ducts..........................................21 General Requirements .......................................21 Ductwork Acoustical Treatment ..................................21 Supply Air Connections ....................................21 Return Air Connections.....................................22 Filter Arrangement........................................22...
Page 3: Safety Considerations
AIRFLOW UPFLOW HORIZONTAL HORIZONTAL LEFT RIGHT DOWNFLOW AIRFLOW AIRFLOW AIRFLOW A93041 Fig. 1—Multipoise Orientations SAFETY CONSIDERATIONS Installing and servicing heating equipment can be hazardous due to gas and electrical components. Only trained and qualified personnel should install, repair, or service heating equipment. Untrained personnel can perform basic maintenance functions such as cleaning and replacing air filters.
Page 4 —4—...
Page 5 INSTALLATION This forced air furnace is equipped for use with natural gas at altitudes 0 - 10,000 ft (0 - 3,050m). 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.
Page 6: Electrostatic Discharge (Esd) Precaution Procedure
A93026 Fig. 4—Condensate Trap ELECTROSTATIC DISCHARGE (ESD) PRECAUTION PROCEDURE CAUTION: Electrostatic discharge can affect electronic components. Follow the Electronic Discharge Precautions Procedure listed below during furnace and servicing to protect the furnace electronic control. Precautions will prevent electrostatic discharges from personnel and hand tools which are held during the procedure. These precautions will help to avoid exposing the control to electrostatic discharge by putting the furnace, the control, and the person at the same electrostatic potential.
Page 7: Upflow Applications
PLUG COLLECTOR BOX DRAIN TUBE (BLUE & WHITE STRIPED) COLLECTOR BOX TUBE (PINK) INDUCER HOUSING (MOLDED) DRAIN TUBE (BEHIND COLLECTOR BOX DRAIN TUBE) COLLECTOR BOX DRAIN TUBE (BLUE) CONDENSATE TRAP COLLECTOR BOX TUBE (GREEN) FIELD-INSTALLED FACTORY-SUPPLIED DRAIN TUBE COUPLING (LEFT DRAIN OPTION) FIELD-INSTALLED FACTORY-SUPPLIED...
Page 8: Condensate Trap Location (Alternate Upflow Orientation)
PLUG COLLECTOR BOX DRAIN TUBE (BLUE & WHITE STRIPED) COLLECTOR BOX TUBE (PINK) COLLECTOR BOX TUBE (GREEN) COLLECTOR BOX DRAIN TUBE (GREEN) CONDENSATE TRAP INDUCER HOUSING DRAIN TUBE (VIOLET) A94214 Fig. 6—Alternate Upflow Configuration and Trap Location NOTE: Failure to use CPVC elbows may allow drain to kink and prevent draining. f.
Page 9: Condensate Trap Field Drain Attachment
a. Connect relief port tube (green label) to condensate trap. b. Extend this tube (if required) by splicing to small diameter tube (factory-supplied in loose parts bag). c. Determine appropriate length, cut, and connect tube. E. Condensate Trap Field Drain Attachment Refer to Condensate Drain section for recommendations and procedures.
Page 10: Condensate Trap Tubing
COLLECTOR BOX TUBE (GREEN) PLUG COLLECTOR BOX DRAIN TUBE (BLUE) COLLECTOR BOX TUBE (PINK) COLLECTOR BOX DRAIN TUBE (BLUE & WHITE STRIPED) COLLECTOR BOX EXTENSION TUBE INDUCER HOUSING DRAIN TUBE (VIOLET) CONDENSATE TRAP COLLECTOR BOX EXTENSION DRAIN TUBE DRAIN TUBE COUPLING A94216 Fig.
Page 11: Condensate Trap Field Drain Attachment
c. Install cap and clamp on UPPER inducer housing drain connection where molded drain tube was removed. d. Use inducer housing drain tube (violet label and factory-supplied in loose parts bag) to connect LOWER inducer housing drain connection to the condensate trap. e.
Page 12: 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 13: Horizontal Right (Supply-Air Discharge) Applications
COMBUSTION - AIR INTAKE VENT A 12-IN. (305 mm) MIN HORIZONTAL PIPE SECTION IS RECOMMENDED WITH SHORT (5 TO 8 FT / 1.5 TO 2.4 M) VENT SYSTEMS TO REDUCE EXCESSIVE CONDENSATE DROPLETS FROM EXITING THE VENT PIPE. ″ (762 mm)MIN WORK AREA ″...
Page 14: 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 A00214 Fig.
Page 15: Condensate Trap Freeze Protection
6. Determine appropriate length, cut, and connect tube. 7. Clamp tube to relief port connection. E. Condensate Trap Freeze Protection Refer to Condensate Drain Protection section for recommendations and procedures F. Construct a Working Platform Construct working platform where all required furnace clearances are met. (See Fig. 3 and 10.) CAUTION: The condensate trap MUST be installed below furnace.
Page 16: Low-Fire Only Installation
CAUTION: If these furnaces are used during construction when adhesives, sealers, and/or new carpets are being installed, make sure all combustion and circulating air requirements are followed. If operation of furnace is required during construction, use clean outside air for combustion and ventilation. Compounds of chlorine and fluorine, when burned with combustion air, form acids which will cause corrosion of heat exchangers.
Page 17: Furnace Location Relative To Coolingequipment
CAUTION: The furnace can operate in the high-fire mode when certain fault conditions occur. The following precautions should be taken: 1. Size gas piping based on the high-fire input. 2. Check the high-fire input and adjust it per the main literature instructions. NEVER assume the high-fire input rate is not important for low-fire-only installation.
Page 18 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 KCAKC 17-1/2 Coil Box Downflow Applications on Combustible Flooring NOT Using...
Page 19: Installation In Horizontal Applications
PLENUM OPENING FLOOR OPENING A96283 Fig. 18—Floor and Plenum Opening Dimensions FURNACE (OR COIL CASING WHEN USED) COMBUSTIBLE FLOORING DOWNFLOW SUBBASE SHEET METAL PLENUM FLOOR OPENING A96285 Fig. 19—Furnace, Plenum, and Subbase Installed on a Combustible Floor NOTE: Remove furnace perforated, supply-air duct flanges when they interfere with mating flanges on coil or downflow subbase. To remove perforated, supply-air duct flanges, use wide duct pliers, duct flange tool, or hand seamers to bend flange back and forth until it breaks off.
Page 20: Air Ducts
FURNACE CD5 OR CK5 COIL ASSEMBLY OR KCAKC COIL BOX COMBUSTIBLE FLOORING SHEET METAL PLENUM FLOOR OPENING A96284 Fig. 20—Furnace, Plenum, and Coil Assembly or Coil Box Installed on a Combustible Floor PERFORATED DISCHARGE DUCT FLANGE 210 DEG. A93029 Fig. 21—Duct Flanges CAUTION: The entire length of furnace MUST be supported when furnace is used in a horizontal position to ensure proper draining.
Page 21: Ductwork Acoustical Treatment
COMBUSTION-AIR INTAKE (NON-DIRECT VENT/1-PIPE COMBUSTION-AIR PIPE APPLICATION) (DIRECT VENT/2-PIPE APPLICATION,ALL SIZES) VENT 3-IN. MINIMUM CLEARANCE TO COMBUSTION-AIR INTAKE IS REQUIRED (NON-DIRECT VENT/1-PIPE 3/8 -IN. (10mm) ROD APPLICATION,) ANGLE /4″ (146mm) IRON OR EQUIVALENT ALTERNATE SUPPORT LOCATION 4-IN. (102mm) MIN 8-IN. (203mm) MAX DRAIN (A) ROD LOCATION USING DIMPLE...
Page 22: Filter Arrangement
PROCEDURE 5—FILTER ARRANGEMENT WARNING: Never operate unit without a filter or with filter access door removed. Failure to follow this warning can cause fire, personal injury, or death. The air filter arrangement will vary due to application, furnace orientation, and filter type. The filter may be installed in an external Filter/Media cabinet (if provided) or the furnace blower compartment.
Page 23: Bottom Closure Panel
21-IN. WIDE ⁄ -IN. WIDE CASINGS ONLY: CASINGS ONLY: SUPPORT RODS (3) INSTALL FIELD-SUPPLIED EXTEND 1/4" ON EACH FILTER FILLER STRIP SIDE OF FILTER AND UNDER FILTER. REST ON CASING FLANGE 3 ″ ″ 1 ″ WASHABLE FILTER FILTER FILTER RETAINER SUPPORT A00290...
Page 24: Gas Piping
Table 3—Maximum Capacity of Pipe* NOMINAL LENGTH OF PIPE (FT) IRON INTERNAL PIPE DIAMETER SIZE (IN.) (IN.) 0.622 0.824 1.049 1-1/4 1.380 1400 1-1/2 1.610 2100 1460 1180 * Cubic ft of gas per hr. for gas pressures of 0.5 psig (14–in. wc) or less and a pressure drop of 0.5–in wc (based on a 0.60 specific gravity gas). Ref: NFGC.
Page 25: Electrical Connections
NOTE: The gas valve inlet press tap connection is suitable to use as test gage connection providing test pressure DOES NOT exceed maximum 0.5 psig (14-in. wc) stated on gas valve. (See Fig. 56.) Piping should be pressure tested in accordance with NFGC local and national plumbing and gas codes before furnace is attached.
Page 26: 24-V Wiring
Table 4—Electrical Data OPERATING VOLTS— MAX WIRE MAX FUSE UNIT UNIT VOLTAGE RANGE HERTZ— UNIT WIRE LENGTH OR CKT BKR SIZE AMPACITY† PHASE AMPS SIZE (FT)‡ AMPS** Max* Min* 042040 115-60-1 12.0 042060 115-60-1 12.0 042080 115-60-1 12.0 060080 115-60-1 13.8 17.9 060100...
Page 27: Direct Venting
ALTERNATE FIELD FACTORY LOCATION INSTALLED LOCATION A00212 Fig. 29—Relocating J-Box NOTE: If desired, cut butt connectors off factory leads and strip insulation approximately 1/4 in and use field-supplied wire nuts to connect. b. An alternate method to attach EAC lead to control center is the following procedure: (1.) Remove 2 screws securing the control box to furnace blower shelf.
Page 28 SCHEMATIC DIAGRAM MODEL JUMPERS FUSED DISCONNECT SWITCH TO 115 VAC FIELD DISCONNECT SIZE 1-4 2-5 3-6 (WHEN REQ’D) NOTE #2 EQUIPMENT GROUND (NATURAL GAS & PROPANE) 042040 NOTE #2 042060 MTR1 042080 060100 060080 1 2 10 4 060120 MTR1 6 5 4 TRAN D.C.
Page 29: Combustion-Air And Vent Piping
HOT SURFACE EAC-ELECTRONIC AIR IGNITOR CONNECTOR CLEANER TERMINALS (115-VAC 1 AMP MAX) 115-V CONNECTORS PRESSURE SWITCH CONNECTOR HUM-HUMIDIFIER MAIN BLOWER TERMINAL CONTROL WIRE (24-VAC 0.5 AMP MAX) CONNECTOR 24-V THERMOSTAT TERMINALS DEHUMIDIFY ENABLE (DE) TRANSFORMER 24-V CONNECTORS DEHUMIDIFIER (DEHUM) CONNECTOR 3-AMP FUSE STATUS AND DIAGNOSTIC LED LIGHTS...
Page 30 DE CONNECTION DE CONNECTION LOCATION A99098 Fig. 33—355MAV Variable Speed Furnace Control VARIABLE-SPEED CONDENSING THERMIDISTAT FURNACE 24 VAC HOT DEHUMIDIFY DHUM DEHUM NOTE 1 24 VAC COMM NOTE 1 - Remove DE Connection To Enable DEHUM Input A98295 Fig. 34—Thermidistat Connection NOTE: Furnace combustion-air and vent pipe connections are sized for 2-in.
Page 31 FURNACE NOT IN HORIZONTAL SECTION PIPE DIAMETER TRANSITION IN VERTICAL SECTION A93034 Fig. 35—Combustion-Air and Vent Pipe Diameter Transition Location and Elbow Configuration Table 5—Combustion-Air and Vent Pipe Termination Clearances CLEARANCE (FT) LOCATION U.S.A. Canada Above grade level or aboveanticipated snow depth 1†...
Page 32 Table 6—Approved Combustion-Air and Vent Pipe, Fitting and Cement Materials 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 33 CAUTION: Combustion air must not be taken from inside structure because inside air is frequently contaminated by halogens, which include fluorides, chlorides, bromides, and iodides. These elements are found in aerosols, detergents, bleaches, cleaning solvents, salts, air fresheners, adhesives, paint, and other household products. Locate combustion-air inlet as far as possible from swimming pool and swimming pool pump house.
Page 34 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 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 35 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 042040 Concentric 1-1/2 2 Pipe or 2-in 042060 Concentric 1-1/2 042080 2 Pipe or 2-in 4001 to 5000‡...
Page 36 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 042040 Concentric 1-1/2 2 Pipe or 2-in 042060 Concentric 1-1/2 042080 2 Pipe or 2-in 8001 to 9000‡...
Page 37: Concentric Vent And Combustion-Air Termination Kit Installation
d. Be certain that mating surfaces of inducer housing connection, elastomeric coupling, and 2-in. diameter vent pipe are clean and dry. Assemble the elastomeric (rubber) vent coupling (with 2 loose clamps) onto inducer housing connection. Insert the 2-in. diameter vent pipe through the elastomeric (rubber) coupling and fully into inducer housing connection until it bottoms on the internal stop.
Page 38 VENT COMBUSTION MAINTAIN 12 IN. (305 mm). (18 IN. (457 mm) FOR CANADA) MINIMUM CLEARANCE ABOVE HIGHEST ANTICIPATED SNOW LEVEL. MAXIMUM OF 24 IN. (610 mm) ABOVE ROOF. A93054 Fig. 40—Concentric Vent and Combustion-Air RoofTermination (Preferred) OVERHANG OR ROOF 12″ (305 mm) MINIMUM 1″...
Page 39 OVERHANG OR ROOF 12″ MINIMUM VENT 90¡ BRACKET COUPLING 12 IN. SEPARATION BETWEEN BOTTOM OF COMBUSTION AIR AND BOTTOM OF VENT MAINTAIN 12 IN. CLEARANCE ABOVE HIGHEST ANTICIPATED SNOW COMBUSTION-AIR LEVEL OR GRADE, WHICHEVER IS (ELBOW PARALLEL GREATER. TO WALL) A87226 Fig.
Page 40: Multiventing And Vent Terminations
Table 8—Maximum Allowable Exposed Vent Pipe Length (ft) With and Without Insulationin Winter Design Temperature Ambient* INSTALLATION THICKNESS WINTER DESIGN MAXIMUM PIPE (IN.) UNIT TEMPERATURE DIAMETER SIZE 1/2 or THICKER (°F) (IN.) INSTALLATION† 042040 1-1/2 1-1/2 1-1/2 042060 1-1/2 1-1/2 1-1/2 042080 060080...
Page 41: Application
An external trap is not required when connecting the field drain to this condensate trap. The field drain connection (condensate trap or drain tube coupling) is sized for l/2-in. CPVC, 1/2-in. PVC, or 5/8-in. ID tube connection. Drain pipe and fittings must conform to ANSI standards and ASTM D1785, D2466 or D2846. CPVC or PVC cement must conform to ASTM D2564 or F493.
Page 42 1″ (25 mm) MAXIMUM (TYP) COMBUSTION AIR VENT VENT A93057 Fig. 46—Concentric Vent and Combustion-Air Side Termination (Dimension “A” is Touching or 2-in. Maximum Separation) VENT COMBUSTION AIR COMBUSTION AIR A96129 Fig. 47—Sidewall Termination of 12 in. or Less (Dimension “A” is Touching or 2-in. Maximum Separation) VENT COMBUSTION AIR COMBUSTION AIR...
Page 43: Sequence Of Operation
OPEN STAND PIPE FOR A/C OR HUMIDIFIER DRAIN TO OPEN DRAIN A94054 Fig. 49—Example of Field Drain Attachment 1. Fold heat tape in half and wrap on itself 3 times. 2. Locate heat tape between sides of condensate trap back. (See Fig. 50.) 3.
Page 44: Self-Test Mode
PROCEDURE 1—SELF-TEST MODE The control center goes through a brief self-test whenever 115-v or 24-v power is interrupted. The self-test takes approximately 2 sec to complete. After power is restored, red (microprocessor) LED briefly comes on. Then green LED comes on for 1 sec, followed by 1 sec where both yellow and green LEDs are on.
Page 45: Cooling Mode
2. Blower on—The blower motor is turned on IMMEDIATELY and slowly increases to maximum speed as soon as a call for heat is received. No blower calibration occurs. 3. Electronic Air Cleaner—The EAC-1 terminal does not operate in emergency heat mode. 4.
Page 46: Two-Speed Applications
VARIABLE-SPEED THERMIDISTAT™ CONDENSING 2-SPEED CONTROL FURNACE AIR CONDITIONER HEAT STAGE 2 O/W2 COOL STAGE 1 Y1/W2 W/W1 HEAT STAGE 1 W/W1 Y/Y2 Y/Y2 COOL STAGE 2 24 VAC HOT DEHUM DEHUMIDIFY DHUM 24 VAC COMM HUMIDIFIER HUMIDIFY SOLENOID VALVE (24 VAC) OUTDOOR SENSOR OUTDOOR...
Page 47: Bypass Humidifier Mode
VARIABLE-SPEED THERMIDISTAT™ CONDENSING 2-SPEED CONTROL FURNACE HEAT PUMP RVS COOLING O/W2 HEAT/COOL STAGE 1 Y1/W2 (COMPRESSOR LO) HEAT STAGE 3 W/W1 W/W1 (FURNACE) HEAT/COOL Y/Y2 Y/Y2 STAGE 2 (COMPRESSOR HI) 24 VAC HOT DEHUM DEHUMIDIFY DHUM 24 VAC COMM HUMIDIFIER HUMIDIFY SOLENOID VALVE (24 VAC)
Page 48: Zone Mode
Table 10—Blower Off Delay Setup Switch (SW) Position DESIRED HEATING SETUP SWITCH MODE BLOWER-OFF SW-3 SW-4 DELAY (SEC) The DEHUM output on the thermidistat control or the humidistat output, is connected directly to the DEHUM terminal on the furnace control. In addition, the DE jumper located next to the DEHUM terminal must be removed to enable the DEHUM input (See Fig.
Page 49: Setup Switches (Sw)
Table 9—Air Conditioning (A/C) Airflow Switch Position A/C SETUP ALLOWABLE FURNACE MODEL SETUP SWITCH POSITION CONDITIONER CFM AIRFLOW (TONS) A/C-1 A/C-2 A/C-3 042040 042060 042080 060080 060100 060120 1200 or 3 Tons 3 Tons 3 Tons 5 Tons 5 Tons 5 Tons Default 2000...
Page 50: Prime Condensate Trap With Water
2. Locate setup switches on control center. (See Fig. 31.) 3. See Table 11 for setup switch description. (See Fig. 30.) 4. Replace main furnace door and blower access panel. Table 11—Setup Switch Description SETUP NORMAL DESCRIPTION SWITCH NO. POSITION OF USE SW-1 Turn switch to ON for fault history display.
Page 51 A99119 Fig. 55—Filling Condensate Trap Furnace input rate must be within ±2 percent of input on furnace rating plate. 1. Determine natural gas orifice size and manifold pressure for correct input. a. Obtain yearly heat value average (at installed altitude) from local gas supplier. b.
Page 52 Table 13—Model 355MAV Orifice Size and Manifold Pressure for Correct Input (Tabulated Data Based on 20,000 Btuh High Heat/13,000 Btuh Low Heat per Burner, Derated 2 Percent for Each 1000 ft Above Sea Level) SPECIFIC GRAVITY OF NATURAL GAS ALTITUDE AVG GAS 0.58 0.60...
Page 53 Table 13—Model 355MAV Orifice Size and Manifold Pressure for Correct Input (Continued) (Tabulated Data Based on 20,000 Btuh High Heat/13,000 Btuh Low Heat per Burner, Derated 2 Percent for Each 1000 ft Above Sea Level) SPECIFIC GRAVITY OF NATURAL GAS ALTITUDE AVG GAS 0.58...
Page 54 Table 13—Model 355MAV Orifice Size and Manifold Pressure for Correct Input (Continued) (Tabulated Data Based on 20,000 Btuh High Heat/13,000 Btuh Low Heat per Burner, Derated 2 Percent for Each 1000 ft Above Sea Level) SPECIFIC GRAVITY OF NATURAL GAS ALTITUDE AVG GAS 0.58...
Page 55: Set Temperature Rise
LOW-FIRE ON/OFF ADJUSTMENT SWITCH ALLEN SCREW (UNDER CAP) HIGH-FIRE ADJUSTMENT ALLEN SCREW INLET (UNDER CAP) PRESSURE BURNER ENCLOSURE REFERENCE PRESSURE TAP MANIFOLD PRESSURE A97386 Fig. 56—Redundant Automatic Gas Valve BURNER ORIFICE A93059 Fig. 57—Burner Orifice m. Move setup switch SW-2 to OFF position and jumper R and W2 thermostat connections. (See Fig. 31.) This keeps furnace locked in high-heat operation.
Page 56: Set Thermostat Heat Anticipator
BURNER FLAME BURNER MANIFOLD A89020 Fig. 58—Burner Flame EXAMPLE: 100,000 Btuh input furnace installed at 4300 ft. Derate Furnace Input Rate Furnace Input Rate Multiplier at Installation at Sea Level Factor Altitude 100,000 0.91 91,000 Table 14—Altitude Derate Multiplier for U.S.A. ALTITUDE PERCENT DERATE MULTIPLIER...
Page 57: Check Safety Controls
Table 15—Gas Rate (Cu Ft/Hr) SIZE OF TEST DIAL SIZE OF TEST DIAL SECONDS SECONDS FOR 1 FOR 1 REVOLUTION REVOLUTION Cu Ft Cu Ft Cu Ft Cu Ft Cu Ft Cu Ft 1800 1636 1500 1385 1286 1200 1125 1059 1000 2.
Page 58 THERMOSTAT SUBBASE TERMINALS WITH THERMOSTAT REMOVED (ANITICIPATOR, CLOCK, ETC., MUST BE OUT OF CIRCUIT.) HOOK-AROUND AMMETER R Y W G 10 TURNS FROM UNIT 24-V CONTROL TERMINALS 0.5 AMPS FOR THERMOSTAT 5.0 AMPS ON AMMETER EXAMPLE: ANTICIPATOR SETTING 10 TURNS AROUND JAWS A96316 Fig.
Page 59: Checklist
CHECKLIST—INSTALLATION Load Calculation Condensate Drain _______ Unit Level or Pitched Forward _______ Heating Load (Btuh) _______ Internal Tubing Connections Freeof Kinks and Traps _______ Cooling Load (Btuh) _______ External Drain Connection Leak tight and Sloped _______ Furnace Model Selection _______ Condensate Trap Primed before Start-Up _______ Heat Tape Installed if Required...

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

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