Instruction/ maintenance manual of the product GAMA 331JAV 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 SAFETY CONSIDERATIONS .....................................................1 ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS PROCEDURE .
2. Firmly touch a clean, unpainted, metal surface of the furnace chassis which is close to the control. Tools held in a person’s hand during grounding will be satisfactorily discharged.
CAUTION: Application of this furnace should be in- doors with special attention given to vent sizing and material, gas input rate, air temperature rise, and unit sizing. Improper installation or misapplication of the furnace can require excessive servicing or cause prema- ture component failure.
I. LOCATION A. General CAUTION: DO NOT install furnace in a corrosive or contaminated atmosphere. Make sure all combustion and circulating air requirements are followed. DO NOT use this furnace during construction when adhesives, sealers, and/or new carpets are being installed and curing.
c. If furnace is installed to obtain return air is taken directly from hallway or space adjacent to furnace, all air for combustion must come from outdoors. 2. Air from outside the structure requires 1 of the following methods: a. If combustion air is taken from outdoors through 2 vertical ducts, the openings and ducts MUST have at least 1 sq in.
IV. FILTER ARRANGEMENT WARNING: Never operate unit without a filter or with filter access door removed. A failure to follow this warning could result in fire, personal injury, or death. The 2 factory-supplied filters are shipped in the blower compart- ment.
WARNING: Use the proper length of pipes to avoid stress on gas control manifold. A failure to follow this warning could result in a gas leak causing fire, explosion, personal injury, or death. CAUTION: Use a backup wrench at furnace gas control when connecting gas pipe to furnace to avoid damaging gas controls or manifold.
Install accessible manual shutoff valve upstream of furnace gas controls and within 72 in. of furnace. A 1/8-in. NPT plugged tapping is provided on gas value for test gage connection.
A terminal block (EAC-1 [hot] and EAC-2 [neutral]) is provided for EAC connection. (See Fig. 10.) The terminals are energized with 115v, 1-amp maximum during blower motor operation. 2. Humidifier (HUM) Screw terminals (HUM-1 and C OM ) are provided for 24-v humidifier connection.
The gas service pressure must not exceed 0.5 psig (14-in. wc), and be no less than 0.16 psig (4.5-in. wc). Thermostat wire connections at R and W/W1 are the minimum required for gas heating operation. W2 must be connected for 2-stage heating thermostats.
→ Fig. 14—Unit Wiring Diagram A97508 LEGEND ALS1 AUXILIARY LI MIT SWITCH , OVERTEMP. MANUAL R ESET, SPST (N.C.) ALS2 AUXILIARY LI MIT SWITCH , OVERTEMP.
a. Inducer prepurge period—As inducer motor IDM comes up to low speed or high speed, the low-heat pressure switch contacts LPS (or LPS and HPS) close to begin a 15-sec prepurge period. b. Ignitor warm-up—At the end of prepurge period, hot surface ignitor HSI is energized for a 17-sec ignitor warm-up period.
(3.) When thermostat is satisfied, R to G-and-Y cir- cuits are opened. The outdoor unit stops, and furnace blower motor BLWM continues operating on high-cool speed for an additional 90 sec. b. Two-Speed Cooling Outdoor Unit (See Fig. 12 for thermostat connections.
b. When installed with a heat pump, furnace control CPU automatically holds blower off time to 22 sec during HSI ignitor on period. After 17 sec of HSI ignitor on period, a trial-for-ignition sequence occurs as described above for gas heating.
g. Turn high-heat adjusting screw (5/64 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 more than 3.8-in. wc for natural gas. If manifold pressure is outside this range, change main burner orifices.
TABLE 9—MODEL 331JAV ORIFICE SIZE AND MANIFOLD PRESSURE FOR CORRECT INPUT (TABULATED DATA BASED ON 21,000 BTUH HIGH HEAT/13,500 BTUH LOW HEAT PER BURNER, DERATED 4% 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.
TABLE 9—MODEL 331JAV ORIFICE SIZE AND MANIFOLD PRESSURE FOR CORRECT INPUT Continued (TABULATED DATA BASED ON 21,000 BTUH HIGH HEAT/13,500 BTUH LOW HEAT PER BURNER, DERATED 4% 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.
TABLE 9—MODEL 331JAV ORIFICE SIZE AND MANIFOLD PRESSURE FOR CORRECT INPUT Continued (TABULATED DATA BASED ON 21,000 BTUH HIGH HEAT/13,500 BTUH LOW HEAT PER BURNER, DERATED 4% 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.
a. Place duct thermometers in return and supply ducts as near furnace as possible. Be sure thermometers do not see heat exchangers so that radiant heat will not affect thermometer readings.
17. The thermostat anticipator should NOT be in this circuit while measuring current. If thermostat has no subbase, thermostat MUST be disconnected from R and W/W1 wires during current measurement. Return SW-2 to final desired location after completing reading.
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A94328 SER VICE TRAINING P ackaged Service T raining prog rams are an e xcellent wa y to increase your knowledge of the equipment discussed in this man ual, including: • Unit F amiliarization • Ma.
© 2008 Bryant Heating & Cooling Systems 7310 W. Morris St. Indianapolis, IN 46231 —24— Printed in U.S.A. 331j602 Catalog No. 5333-100.
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However, one of the most important roles played by the user manual is to help in solving problems with Bryant GAMA 331JAV. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Bryant GAMA 331JAV 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
