Instruction/ maintenance manual of the product 355MAV Bryant
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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 ........
Check Primary Limit Control .................................................45 Check Pressure Switch ......................................................45-46 CHECKLIST ...............................................................................
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.
These furnaces are shipped with the following materials to assist in proper furnace installation. These materials are shipped in the main blower compartment.
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.
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.
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.
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.
(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.
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.
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.
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.
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.
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.
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 Fl.
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.
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.
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.
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.
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.
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.
→ 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 .
→ Fig. 32 — Control Center A02278 FLASH UPGRADE CONNECTOR (FACTORY ONLY) ACRDJ – AIR CONDITIONING RELAY DISABLE JUMPER HUMIDIFIER TERMINAL (24-VAC 0.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
A00275 → Fig. 50 — Two-Stage Furnace with Single-Speed Air Conditioner Fig. 51 — Two-Stage Furnace with Two-Speed Air Conditioner A00276 A00277 → Fig.
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.
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.
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.
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.
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 revolu.
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.
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 .
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.
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.
CHECKLIST — INSTALLATION LOAD CALCULATION ____________ Heating Load (Btuh) ____________ Cooling Load (Btuh) ____________ Furnace Model Selection COMBUSTION AND VENT PIPING Termination Location _____.
© 2002 Bryant Heating & Cooling Systems 7310 W. Morris St. Indianapolis, IN 46231 — 48 — Printed in U.S.A. 355m4010 Catalog No. 5335-516.
An important point after buying a device Bryant 355MAV (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Bryant 355MAV yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Bryant 355MAV - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Bryant 355MAV you will learn all the available features of the product, as well as information on its operation. The information that you get Bryant 355MAV will certainly help you make a decision on the purchase.
If you already are a holder of Bryant 355MAV, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Bryant 355MAV.
However, one of the most important roles played by the user manual is to help in solving problems with Bryant 355MAV. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Bryant 355MAV along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
