Instruction/ maintenance manual of the product GAS-FIRED INDUCED-COUSTION FURNACES 373LAV Bryant
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NOTE: Read the entire instruction manual before performing any service or maintenance. This symbol → indicates a change since the last issue. These procedures are for size 44,000 through 154,000 Btuh input units. Index Page SAFETY CONSIDERATIONS ...
WARNING: The ability to properly perform mainte- nance on this equipment requires certain expertise, me- chanical skills, tools, and equipment. If you do not possess these, do not attempt to perform any maintenance on this equipment other than those procedures recom- mended in the User’s Manual.
1. Downflow/Horizontal Each furnace requires 2 filters which are installed in the return-air duct. (See Fig. 4 and 5.) To remove filters for cleaning or replacement, proceed as follows: a. Disconnect electrical power before removing blower access door.
9. If a greasy residue is present on blower wheel, remove wheel from the blower housing and wash it with an appropriate degreaser. To remove wheel: a. Mark blower wheel location on shaft before disassembly to ensure proper reassembly. b. Loosen setscrew holding blower wheel on motor shaft.
WARNING: Blower access door switch opens 115-v power to furnace control. No component operation can occur. Caution must be taken when manually closing this switch for service purposes. Failure to follow this warn- ing could result in electrical shock, personal injury, or death.
(8.) Reinstall cell inlet plates and burner assembly. Care must be exercised to center burners in cell openings. 11. Clean flame sensor with fine steelwool. 12. Remove old sealant from center panel and collector box flange and apply new sealant to collector box flange and reinstall on center panel, making sure all 8 screws are secure.
c. Remove control access door. d. BRIEFLY remove either wire from the main limit switch until LED goes out, then reconnect it. NOTE: If wire to main limit is disconnected longer than 4 sec, main blower starts, and retrieval request is ignored. 2. When above items have been completed, the following will occur: a.
Fig. 11—Furnace Control A99255 HUMIDIFIER TERMINAL (24-V AC 0.5 AMP MAX) LED OPERA TION & DIAGNOSTIC LIGHT HARNESS CONNECT OR 24-V TRANSFORMER SEC-2 SP ARE-1 SP ARE-2 EAC-1 EAC-ELECTR ONIC AIR CLEANER TERMINALS (115-V AC 1.
→ Fig. 12—Furnace Wiring Diagram A00304 PCB BLOWER OFF DELAY SELECTION CHART 90 SEC 135 SEC 180 SEC 225 SEC GVR H I/L O RELA Y SEC-1 SEC-2 PL1 3 2 1 6 5 4 9 87 LED TEST/TWIN BLOWER OFF DELAY G R Y.
Fig. 13—Service Label A96263 SERVICE 11 NO PREVIOUS CODE - Stored sta tus codes are er ased when power (115 V or 24V) to control is interrupted or 48 hours after ea ch fault is cl eared. 12 BLOWER ON AFTER POWER UP ( 115V or 24V) - Blower ru ns for 90 seconds, if unit is power ed up duri ng a call for hea t (R-W closed).
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Is circuit breaker closed? Close door switch and go to start. Is red LED status light on? Is door switch closed? Is red LED status light blinking rapidly without a pause? Is there 1 15v going to switch? Replace door switch. Replace control center . Replace transformer .
11 NO PREVIOUS F AUL T - Faults are erased after 48 hrs or whenever power (1 15v or 24v) is interrupted. Run system through a heating or cooling cycle to check system. 12 BLO WER ON AFTER PO WER UP (115V OR 24V) - Normal operation. Blower will run for 90 sec when furnace power is interrupted during a call for heat, R-W closed.
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A94328 SERVICE TRAINING Packaged Service Training programs are an excellent way to increase your knowledge of the equipment discussed in this manual, including: • Unit Familiarization • Maintenanc.
An important point after buying a device Bryant GAS-FIRED INDUCED-COUSTION FURNACES 373LAV (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 GAS-FIRED INDUCED-COUSTION FURNACES 373LAV 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 GAS-FIRED INDUCED-COUSTION FURNACES 373LAV - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Bryant GAS-FIRED INDUCED-COUSTION FURNACES 373LAV you will learn all the available features of the product, as well as information on its operation. The information that you get Bryant GAS-FIRED INDUCED-COUSTION FURNACES 373LAV will certainly help you make a decision on the purchase.
If you already are a holder of Bryant GAS-FIRED INDUCED-COUSTION FURNACES 373LAV, 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 GAS-FIRED INDUCED-COUSTION FURNACES 373LAV.
However, one of the most important roles played by the user manual is to help in solving problems with Bryant GAS-FIRED INDUCED-COUSTION FURNACES 373LAV. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Bryant GAS-FIRED INDUCED-COUSTION FURNACES 373LAV 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
