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Bryant 355MAV - page 1
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 ..................................................2-5 Clearances to Combustibles........................... ...
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Bryant 355MAV - page 2
Check Primary Limit Control .................................................45 Check Pressure Switch ......................................................45-46 CHECKLIST ................................................................................46 SAFETY CONSIDERATIONS CAUTION: Application of this furnace should be in- doors with special att ...
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Bryant 355MAV - page 3
Fig. 2 — Dimensional Drawing DIMENSIONS (IN.) UNIT SIZE A D E 042040* 24-1/2* 22-7/8* 23* 042060 17-1/2 15-7/8 16 042080 21 19-3/8 19-1/2 060080 21 19-3/8 19-1/2 060100 21 19-3/8 19-1/2 060120 24-1/2 22-7/8 23 * These dimensions reflect the wider casing for the Trophy (96.6 percent AFUE) furnace. A99112 NO TES: 1. Minimum return-air openings at f ...
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Bryant 355MAV - page 4
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, Start-Up, and Operating Instructions Service and Maintenance Procedures User ’ s Information Manual Warranty Certificate Loose Parts Bag includes: Qu ...
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Bryant 355MAV - page 5
Combustion-air pipe perforated disk assembly 1 Condensate trap hole filler plug 3 Vent and combustion-air intake hole filler plug 2 CODES AND STANDARDS Follow all national and local codes and standards in addition to these instructions. The installation must comply with regulations of the serving gas supplier, local building, heating, plumbing, and ...
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Bryant 355MAV - page 6
1. Collector Box Drain, Inducer Housing Drain, Relief Port, and Pressure Switch Tubes These tubes should be factory attached to condensate trap and pressure switch ready for use in UPFLOW applications. These tubes can be identified by their connection location and also by a color label on each tube. These tubes are identified as follows: collector ...
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Bryant 355MAV - page 7
WARNING: Casing hole filler cap must be installed in blower shelf hole when condensate trap is relocated. Failure to follow this warning could result in electrical shock, fire, personal injury or death. 4. Install condensate trap into left-hand side casing hole by inserting tube connection stubs through casing hole and rotating until tabs snap into ...
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Bryant 355MAV - page 8
G. Upper Collector Box and Inducer Housing (Unused) Drain Connections UPPER COLLECTOR BOX DRAIN CONNECTION Attached to the UPPER collector box drain connection is a factory-installed corrugated, plugged tube (blue and white striped label). This tube is plugged to prevent condensate leakage in this application. Ensure this tube is plugged. NOTE: See ...
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Bryant 355MAV - page 9
(2.) Condensate Trap Located on Right Side of Casing (a.) Install drain tube coupling (factory-supplied in loose parts bag) into collector box drain tube (blue and white striped label) which was pre- viously plugged. (b.) Connect larger diameter drain tube (factory- supplied in loose parts bag) to drain tube coupling, extending collector box drain ...
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Bryant 355MAV - page 10
a. Install drain tube coupling (factory-supplied in loose parts bag) into collector box drain tube (blue label) which was previously connected to condensate trap. b. Connect large diameter drain tube and clamp (factory- supplied in loose parts bag) to drain tube coupling, extending collector box drain tube. c. Route extended tube (blue label) to co ...
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Bryant 355MAV - page 11
CAUTION: The condensate trap MUST be installed below furnace. See Fig. 6 for dimensions. The drain connection to condensate trap must also be properly sloped to an open drain. NOTE: Combustion-air and vent pipes are restricted to a mini- mum length of 5 ft. (See Table 7.) NOTE: A 12-in. minimum offset pipe section is recommended with short (5 to 8 ...
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Bryant 355MAV - page 12
d. Clamp tube to prevent any condensate leakage. 2. Inducer Housing Drain Tube 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 ...
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Bryant 355MAV - page 13
LOCATION I. GENERAL This furnace must • be installed so the electrical components are protected from water. • not be installed directly on any combustible material other than wood flooring (refer to SAFETY CONSIDERATIONS). • be located so combustion-air and vent pipe maximum lengths are not exceeded. Refer to Table 7. • be located where ava ...
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Bryant 355MAV - page 14
CAUTION: The furnace can operate in the high-heat mode when certain fault conditions occur. The following precautions should be taken: 1. Size gas piping based on the high-heat input. 2. Check the high-heat input and adjust it per the main literature instructions. NEVER assume the high-heat input rate is not important for low-heat-only installation ...
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Bryant 355MAV - page 15
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 K ...
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Bryant 355MAV - page 16
be suspended from each corner by hanger bolts and angle iron supports. (See Fig. 23.) Cut hanger bolts (4 each 3/8-in. all-thread rod) to desired length. Use 1 X 3/8-in. flat washers, 3/8-in. lockwashers, and 3/8-in. nuts on hanger rods as shown in Fig. 23. Dimples are provided for hole locations. (See Fig. 2.) CAUTION: The entire length of furnace ...
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Bryant 355MAV - page 17
Secure ductwork with proper fasteners for type of ductwork used. Seal supply- and return-duct connections to furnace with code approved tape or duct sealer. Flexible connections should be used between ductwork and furnace to prevent transmission of vibration. Ductwork passing through unconditioned space should be insulated to enhance system perform ...
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Bryant 355MAV - page 18
To remove bottom closure panel, perform following: 1. Tilt or raise furnace and remove 2 screws holding front filler panel. (See Fig. 26.) 2. Rotate front filler panel downward to release holding tabs. 3. Remove bottom closure panel. 4. Reinstall front filler panel and screws. G. Gas Piping Gas piping must be installed in accordance with national a ...
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Bryant 355MAV - page 19
WARNING: Use proper length of pipe to avoid stress on gas control manifold. Failure to follow this warning could result in a gas leak resulting in fire, explosion, personal injury, or death. Install a sediment trap in riser leading to furnace. Trap can be installed by connecting a tee to riser leading to furnace so straight-through section of tee i ...
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Bryant 355MAV - page 20
II. 24-V WIRING Make field 24-v thermostat connections at 24-v terminal block on furnace control. Y wire from thermostat MUST be connected to Y/Y2 terminal on furnace control, as shown in Fig. 28, for proper cooling operation. The 24-v terminal block is marked for easy connection of field wiring. (See Fig. 32.) The 24-v circuit contains a 3-amp, au ...
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Bryant 355MAV - page 21
2. Humidifier (HUM) Connect an accessory 24 VAC, 0.5 amp maximum humidi- fier (if used) to the 1/4-in. male quick-connect HUM terminal and C OM -24V screw terminal on the control board thermostat strip. The HUM terminal is energized when blower is energized in heating. (See Fig. 32.) WARNING: DO NOT connect furnace control HUM terminal to HUM (humi ...
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Bryant 355MAV - page 22
→ Fig. 31 — Unit Wiring Diagram A02291 L E G E N D JUNCTIO N TERMINAL CONTROL TERMINAL FACTORY POWER WIRING (1 15V AC) FACTORY CONTR O L WIRING (2 4V AC) FIELD CONTROL WIRING (2 4V AC) CONDUCTOR ON CONTROL FIELD WIRING SCREW TERMINAL EQUIPMENT GROUND PLUG RE CEPT ACLE NOTES: 327971-1 01 REV . A 1. If any of t h e ori gi nal equipmen t wi re i s ...
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Bryant 355MAV - page 23
→ Fig. 32 — Control Center A02278 FLASH UPGRADE CONNECTOR (FACTORY ONLY) ACRDJ – AIR CONDITIONING RELAY DISABLE JUMPER HUMIDIFIER TERMINAL (24-VAC 0.5 AMP MAX. CONTINUOUS FAN (CF) AIRFLOW SETUP SWITCHES COMMUNICATION CONNECTOR AIR CONDITIONING (A/C) AIRFLOW SETUP SWITCHES MODEL PLUG CONNECTOR SW1 SETUP SWITCHES AND BLOWER OFF- DELAY STATUS AN ...
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Bryant 355MAV - page 24
Furnace combustion-air and vent pipe connections must be at- tached as shown in Fig. 34. Combustion-air intake plug fitting and inducer housing alternate vent cap may need to be relocated in some applications. CAUTION: When combustion-air pipe is installed above a suspended ceiling, pipe must be insulated with 3/8-in. thick Armaflex-type insulation ...
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Bryant 355MAV - page 25
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. 35, to reduce excessive droplets from exiting vent pipe outlet. B. Combustion-Air and Vent Pip ...
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Bryant 355MAV - page 26
TABLE 7 — MAXIMUM ALLOWABLE PIPE LENGTH (FT) ALTITUDE UNIT SIZE TERMINATION TYPE PIPE DIAMETER (IN.)* NUMBER OF 90 ° ELBOWS 1 23456 0 to 2000 042040 2 Pipe or 2-In. Concentric 1-1/2 50 45 40 35 30 25 2 7 0 7 07 07 07 07 0 042060 2 Pipe or 2-In. Concentric 1-1/2 50 45 40 35 30 25 2 7 0 7 07 07 07 07 0 042080 060080 2 Pipe or 2-In. Concentric 1-1/ ...
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Bryant 355MAV - page 27
TABLE 7 — MAXIMUM ALLOWABLE PIPE LENGTH (FT) Continued ALTITUDE UNIT SIZE TERMINATION TYPE PIPE DIAMETER (IN.)* NUMBER OF 90 ° ELBOWS 1 2 3 456 6001 to 7000 ‡ 042040 2 Pipe or 2-In. Concentric 1-1/2 35 30 25 20 15 10 2 7 07 06 8 6 7 6 6 6 4 042060 2 Pipe or 2-In. Concentric 1-1/2 35 30 25 20 15 10 2 7 07 06 8 6 7 6 6 6 4 042080 060080 2 Pipe o ...
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Bryant 355MAV - page 28
a. Determine location of combustion-air intake pipe con- nection to combustion-air intake housing as shown in Fig. 34 for application. b. Reposition combustion-air intake housing plug fitting in appropriate unused intake housing connection. c. Insert perforated disk assembly (factory supplied) in intake housing where combustion-air intake pipe will ...
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Bryant 355MAV - page 29
12. Support combustion-air and vent piping a minimum of every 5 ft (3 ft for SDR-21 or -26 PVC) using perforated metal hanging strap. 13. Slope combustion-air and vent pipes downward toward furnace a minimum of 1/4 in. per linear ft with no sags between hangers. 14. Use appropriate methods to seal openings where vent and combustion-air pipes pass t ...
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Bryant 355MAV - page 30
Fig. 40 — 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. 38 — Concentric Vent and Combustion-Air Roof Terminati ...
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Bryant 355MAV - page 31
furnaces are vented near each other, 2 vent terminations may be installed as shown in Fig. 42, 43, 44, 45, or 46, but next vent termination must be at least 36 in. away from first 2 terminations. It is important that vent terminations be made as shown to avoid recirculation of flue gases. Dimension "A" in Fig. 42, 43, 44, 45, and 46 repre ...
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Bryant 355MAV - page 32
Fig. 45 — Sidewall Termination of 12 in. or Less (Dimension "A" is Touching or 2-In. Maximum Separation) A96129 A COMBUSTION AIR COMBUSTION AIR VENT Fig. 43 — Concentric Vent and Combustion-Air Roof Termination (Dimension "A" is Touching or 2-In. Maximum Separation) A93056 COMBUSTION AIR VENT VENT A Fig. 46 — Sidewall Term ...
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Bryant 355MAV - 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 will be ON continuous, as long as no faults are detected. After the 90-second period, the furnace will respond to the thermostat normally. The blower door must be installed for power to be conducted through the blower ...
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Bryant 355MAV - page 34
low-heat pressure switch LPS closes. When the high-heat pressure switch closes, inducer motor RPM is noted by the furnace control CPU before the 25-sec prepurge period begins. The RPM is used to evaluate vent system resistance. This evaluation is then used to determine the required RPM necessary to operate the inducer motor in high-heat mode. 2. Ig ...
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Bryant 355MAV - page 35
When the thermostat is satisfied, the R-to-G-and-Y circuits are opened. The outdoor unit will stop, and furnace blower motor BLWM will continue operating at cooling airflow for an additional 90 sec. Jumper Y/Y2 to DHUM to reduce the cooling off-delay to 5 seconds. (See Fig. 32.) 2. Single-Stage Thermostat and Two-Speed Cooling (Adaptive Mode) (See ...
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Bryant 355MAV - page 36
c. Cooling off-delay -When the ″ call for cooling ″ is satis- fied and there is a demand for dehumidification, the cooling blower-off delay is decreased from 90 seconds to 5 seconds. VI. CONTINUOUS BLOWER MODE When the R to G circuit is closed by the thermostat, the blower motor BLWM will operate at continuous-blower airflow. Continu- ous blowe ...
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Bryant 355MAV - page 37
A00275 → Fig. 50 — Two-Stage Furnace with Single-Speed Air Conditioner Fig. 51 — Two-Stage Furnace with Two-Speed Air Conditioner A00276 A00277 → Fig. 52 — Two-Stage Furnace with Single-Speed Heat Pump (Dual Fuel) A00278 → Fig. 53 — Two-Stage Furnace with Two-Speed Heat Pump (Dual Fuel) — 37 — → ...
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Bryant 355MAV - page 38
To set the desired cooling airflow: 1. Remove main furnace door and blower access door. 2. Locate A/C setup switches on frunace control. (See Fig. 32.) 3. Determine air conditioning tonnage used. 4. Use Fig. 58 or wiring schematic to determine proper setup position of A/C switches. (See Fig. 31 and 59.) NOTE: Excessive airflow caused by improper A/ ...
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Bryant 355MAV - page 39
C. Setup Switches (SW1) The furnace control has 8 setup switches that may be set to meet the application requirements. Position these setup switches for the appropriate requirement. 1. Remove main furnace door and blower access panel. 2. Locate setup switches on furnace control. (See Fig. 32.) 3. See Table 9 for setup switch description. (See Fig. ...
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Bryant 355MAV - page 40
e. Find closest natural gas heat value and specific gravity in Table 11. f. Follow heat value and specific gravity lines to point of intersection to find orifice size and low- and high-heat manifold pressure settings for proper operation. EXAMPLE: (0 — 2000 ft altitude) Heating value = 1050 Btu/cu ft Specific gravity = 0.62 Therefore: Orifice No. ...
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Bryant 355MAV - page 41
g. Jumper R and W/W1 and W2 thermostat connections on furnace control. (See Fig. 32.) This keeps furnace locked in high-heat operation. h. Turn high-heat adjusting screw (3/32 hex Allen wrench) counterclockwise (out) to decrease input rate or clock- wise (in) to increase rate. NOTE: DO NOT set high-heat manifold pressure less than 3.2-in. wc or mor ...
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Bryant 355MAV - page 42
EXAMPLE: (High-heat operation at 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 13) Btu heating input = 103 X 975 = 100,425 Btuh In this example, the orifice size a ...
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Bryant 355MAV - page 43
A V G. GAS SPECIFIC GRA VITY OF NA TURAL GAS HEA T V ALUE 0.58 0.60 0.62 0.64 A T AL TITUDE Or ifice Mnfld Press Or ifice Mnfld Press Or ifice Mnfld Press Or ifice Mnfld Press (Btu/cu ft) No. High/Low No . High/Low No. High/Low No . High/Low 900 43 3.5 / 1.5 43 3.6 / 1.5 43 3.8 / 1.6 42 3.2 / 1.3 925 44 3.8 / 1.6 43 3.5 / 1.5 43 3.6 / 1.5 43 3.7 / ...
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Bryant 355MAV - page 44
A V G. GAS SPECIFIC GRA VITY OF NA TURAL GAS HEA T V ALUE 0.58 0.60 0.62 0.64 A T AL TITUDE Orifice Mnfld Press Orifice Mnfld Press Orifice Mnfld Press Or ifice Mnfld Press (Btu/cu ft) No . High/Low No. High/Low No . High/Low No. High/Low T ABLE 11 - ORIFICE SIZE* AND MANIFOLD PRESSURES FOR GAS INPUT RA TE (T ABULA TED D A T A BASED ON 20,000 BTUH ...
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Bryant 355MAV - page 45
Fig. 65 illustrates an easy method of obtaining thermostat amp draw measurements. The amp reading should be taken after blower motor has started and furnace is operating in low-heat. 1. To operate furnace in low-heat, turn setup switch SW1-2 to ON position (See Fig. 32) and connect ammeter leads across thermostat subbase R-W. 2. See thermostat manu ...
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Bryant 355MAV - page 46
switch is closed. If either a status code 31 or 32 is flashed when inducer motor is disconnected, the furnace will shut itself down immediately. Determine the reason pressure switches did not function properly and correct the condi- tion. 5. Turn off 115-v power to furnace. 6. Reconnect inducer motor wire harness. Reinstall furnace access door. 7. ...
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Bryant 355MAV - page 47
CHECKLIST — INSTALLATION LOAD CALCULATION ____________ Heating Load (Btuh) ____________ Cooling Load (Btuh) ____________ Furnace Model Selection COMBUSTION AND VENT PIPING Termination Location ________ Roof or Sidewall ________ Termination Kit — 2 Pipe or Concentric ________ Combustion-Air Pipe Length ________ Combustion-Air Pipe Elbow Quantity ...
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Bryant 355MAV - 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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