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Check Safety Controls

The flame sensor, gas valve, and pressure switch were all checked

in the Start--up procedure section as part of normal operation.

1. Check Main Limit Switch

This control shuts off combustion system and energizes
air--circulating blower motor, if furnace overheats. By us-
ing this method to check limit control, it can be established

that limit is functioning properly and will operate if there
is a restricted return--air supply or motor failure. If limit

control does not function during this test, cause must be
determined and corrected.

a. Run furnace for at least 5 minutes.

b. Gradually block off return air with a piece of card-

board or sheet metal until the limit trips.

c. Unblock return air to permit normal circulation.

d. Burners will re--light when furnace cools down.

2. Check draft safeguard switch. The purpose of this control

is to cause the safe shutdown of the furnace during certain
blocked vent conditions.

a. Verify vent pipe is cool to the touch.

b. Disconnect power to furnace and remove vent con-

nector from furnace vent elbow.

c. Restore power to furnace and set room thermostat

above room temperature.

d. After normal start--up, allow furnace to operate for 2

minutes, then block vent elbow in furnace 80 percent

of vent area with a piece of flat sheet metal.

e. Furnace should cycle off within 2 minutes. If gas does

not shut off within 2 minutes, determine reason draft
safeguard switch did not function properly and correct
condition.

f. Remove blockage from furnace vent elbow.

g. Switch will auto--reset when it cools.
h. Re--install vent connector.

NOTE

: Should switch remain open longer than 3 minutes,

furnace control board will lockout the furnace for 3 hours. To
reset furnace control board, turn thermostat below room
temperature or from HEAT to OFF and turn 115--v power OFF,
then back ON.

3. Check Pressure Switch(es)

This control proves operation of the draft inducer blower.

a. Turn off 115--v power to furnace.

b. Disconnect inducer motor lead wires from wire har-

ness.

c. Turn on 115--v power to furnace.

d. Set thermostat to “call for heat” and wait 1 minute.

When pressure switch is functioning properly, hot sur-
face igniter should NOT glow and control diagnostic
light flashes a status code 32. If hot surface igniter

glows when inducer motor is disconnected, shut down
furnace immediately.

e. Determine reason pressure switch did not function

properly and correct condition.

f. Turn off 115--v power to furnace.

g. Reconnect inducer motor wires, replace outer door,

and turn on 115--v power.

h. Blower will run for 90 seconds before beginning the

call for heat again.

i. Furnace should ignite normally.

Checklist

1. Put away tools and instruments. Clean up debris.
2. Verify that switches SW1--1 and SW1--6 are OFF and oth-

er setup switches are set as desired. Verify that switches

SW1--7 and SW1--8 for the blower OFF DELAY are set as
desired per Table 10.

3. Verify that blower and burner access doors are properly in-

stalled.

4. Cycle test furnace with room thermostat.
5. Check operation of accessories per manufacturer’s instruc-

tions.

6. Review User’s Guide with owner.
7. Attach literature packet to furnace.

SERVICE AND MAINTENANCE

PROCEDURES

FIRE, INJURY OR DEATH HAZARD

Failure to follow this warning could result in personal

injury, death and/or property damage.
The ability to properly perform maintenance on this

equipment requires certain knowledge, mechanical skills,

tools, and equipment. If you do not possess these, do not

attempt to perform any maintenance on this equipment

other than those procedures recommended in the User’s

Manual.

WARNING

ENVIRONMENTAL HAZARD

Failure to follow this caution may result in environmental

pollution.
Remove and recycle all components or materials (i.e. oil,

refrigerant, control board, etc.) before unit final disposal.

CAUTION

ELECTRICAL SHOCK, FIRE OR EXPLOSION

HAZARD

Failure to follow this warning could result in personal

injury or death, or property damage.
Before installing, modifying, or servicing system, main

electrical disconnect switch must be in the OFF position and

install a lockout tag.

There may be more than one

disconnect switch. Lock out and tag switch with a suitable

warning label. Verify proper operation after servicing.

WARNING

ELECTRICAL OPERATION HAZARD

Failure to follow this caution may result in improper

furnace operation or failure of furnace.
Label all wires prior to disconnection when servicing

controls. Wiring errors can cause improper and dangerous

operation.

CAUTION

General

These instructions are written as if the furnace is installed in an

upflow application. An upflow furnace application is where the
blower is located below the combustion and controls section of

314AA

Содержание 314A

Страница 1: ...tment 13 Supply Air Connections 14 Upflow and Horizontal Furnaces 14 Downflow Furnaces 14 Return Air Connections 20 Downflow Furnaces 20 Upflow and Horizontal Furnaces 20 GAS PIPING 20 ELECTRICAL CONN...

Страница 2: ...jury or product and property damage NOTE is used to highlight suggestions which will result in enhanced installation reliability or operation 1 Use only with type of gas approved for this furnace Refe...

Страница 3: ...3 A10269 Fig 1 Clearances to Combustibles 314AAV...

Страница 4: ...on DC 20001 www AGA org Combustion and Ventilation Air Section 9 3 NFPA 54 ANSI Z223 1 2012 Air for Combustion and Ventilation Duct Systems Air Conditioning Contractors Association ACCA Manual D Sheet...

Страница 5: ...20 in 508 mm round or 14 1 2 x 19 1 2 in 368 x 495 mm rectangle c For 1600 CFM 22 in 559 mm round or 14 1 2 x 22 1 16 in 368 x 560mm rectangle d For airflow requirements above 1800 CFM see Air Deliver...

Страница 6: ...all combustion and circulating air requirements are met in addition to all local codes and ordinances WARNING The following types of furnace installations may require OUTDOOR AIR for combustion due t...

Страница 7: ...aining the furnace This prevents a negative pressure condition as created by the circulating air blower causing a flame rollout and or drawing combustion products into the structure The furnace is con...

Страница 8: ...2 200 62 2 3 300 93 4 4 400 124 5 5 500 155 7 6 600 186 8 7 700 218 0 0 20 3 150 89 1 4 200 118 9 5 250 148 6 3 300 93 4 4 950 140 1 6 600 186 8 8 250 233 6 9 900 280 3 11 550 327 0 0 10 6 300 178 3...

Страница 9: ...combined input of all gas appli ances in the space per Table 1 and b Not less than the sum of the areas of all vent connect ors in the space CIRCULATING AIR DUCTS 6 MIN FRONT CIRCULATING AIR DUCTS VEN...

Страница 10: ...nt ventilation and dilution of flue gases However in buildings with unusually tight construction additional air MUST be provided using the methods de scribed in the Outdoor Combustion Air Method secti...

Страница 11: ...d this panel when bottom return air is used To remove bottom closure panel perform the following 1 Tilt or raise furnace and remove 2 screws holding bottom filler panel See Fig 9 2 Rotate bottom fille...

Страница 12: ...and discard this panel when bottom return air is used To remove bottom closure panel perform the following 1 Tilt or raise furnace and remove two screws holding bot tom filler panel See Fig 9 2 Rotat...

Страница 13: ...Filter Arrangement CARBON MONOXIDE POISONING HAZARD Failure to follow this warning could result in personal injury or death Never operate a furnace without a filter or with filter access door removed...

Страница 14: ...All accessories MUST be connected to duct external to furnace main casing NOTE For horizontal applications the top most flange may be bent past 90_ to allow the evaporator coil to hang on the flange t...

Страница 15: ...ROD 8 203mm MIN FOR DOOR REMOVAL OUTER DOOR ASSEMBLY A10130 Fig 15 Horizontal Unit Suspension METHOD 2 USE 4 8 x 3 4 19 mm SHEET METAL SCREWS FOR EACH STRAP THE STRAPS SHOULD BE VERTICAL AGAINST THE...

Страница 16: ...IONS OF THE TOP AND TWO SIDES OF THE FURNACE JACKET AND BUILDING JOISTS STUDS OR FRAMING GAS ENTRY 17 3 4 451mm OVERALL 4 3 4 121mm UNDER DOOR 1 25mm UNDER FURNACE EXTEND OUT 12 305mm FROM FACE OF DOO...

Страница 17: ...17 A02163 Fig 19 Downflow Return Air Configurations and Restrictions A02162 Fig 20 Horizontal Return Air Configurations and Restrictions 314AAV...

Страница 18: ...25 1280 1210 OFF OFF ON 640 See note 4 OFF ON OFF 840 775 700 640 See note 4 OFF ON ON 1045 980 920 860 805 750 690 640 See note 4 ON OFF OFF 1220 1175 1120 1075 1025 970 925 875 820 775 ON OFF ON 139...

Страница 19: ...1180 1085 1015 935 880 805 ON OFF ON 1670 1605 1540 1480 1425 1350 1280 1220 1135 1070 ON ON OFF 2040 1985 1930 1880 1830 1775 1715 1660 1595 1510 ON ON ON 2520 2455 2405 2350 2290 2195 2090 1965 181...

Страница 20: ...ximum length shall not exceed 36 in 915 mm 3 When lever handle type manual equipment shutoff valves are used they shall be T handle valves 4 The use of copper tubing for gas piping is NOT approved by...

Страница 21: ...oor switch opens 115 v power to control No component operation can occur Do not bypass or close switch with panel removed WARNING See Fig 25 for field wiring diagram showing typical field 115 v wiring...

Страница 22: ...Do NOT remove green ground screw inside J Box See Fig 23 2 Cut wire tie on loop in furnace wires attached to J Box 3 Move J Box to desired location 4 Fasten J Box to casing with the two screws removed...

Страница 23: ...ation service or maintenance could cause this fuse to blow If fuse replacement is required use ONLY a 3 amp fuse of identical size ACCESSORIES 1 Electronic Air Cleaner EAC Connect an accessory Electro...

Страница 24: ...W2 Y Y2 G NOTES 1 2 3 A95236 Fig 25 Field Wiring Diagram 24 V THERMOSTAT TERMINALS PL2 HOT SURFACE IGNITER INDUCER MOTOR CONNECTOR 115 VAC L2 NEUTRAL CONNECTIONS 115 VAC L1 LINE VOLTAGE CONNECTIONS EA...

Страница 25: ...system or vent connectors may need to be resized Vent systems or vent connectors must be sized to approach minimum size as determined using appropriate table found in the current edition of NFGC Gene...

Страница 26: ...these figures A03180 Fig 29 Two Stage Furnace with Single Speed Heat Pump Dual Fuel See notes 1 2 3 4 6 8 9 10 12 13 and 15 on the page following these figures A03178 Fig 30 Two Stage Furnace with Tw...

Страница 27: ...urnace and Two Speed Heat Pump See notes 2 11 and 12 on the page following these figures A03183 Fig 33 Two Stage Thermostat with Two Stage Furnace and Two Speed Air Conditioner See notes 1 and 2 on th...

Страница 28: ...iguration Option No 10 Dual Fuel Selection must be turned ON in all dual fuel applications 10 NO connection should be made to the furnace HUM terminal when using a Thermidistat 11 Optional connection...

Страница 29: ...nt fuel oil residue Is liner and top seal in good condition Is chimney property lined with clay tile liner Crown condition Missing mortar or brick Rebuild crown Yes Yes No No No Reline Yes Repair Yes...

Страница 30: ...al information on condensate drains b Indicates the chimney exceeds the maximum permiss ible size in the tables the chimney should be rebuilt or relined to conform to the requirements of the equip men...

Страница 31: ...ces A field supplied 4 in 102 mm to 5 in 127 mm or 4 in 102 mm to 6 in 152 mm sheet metal increaser fitting is required when 5 in 127 mm or 6 in 152 mm vent connector is used See Fig 36 48 Venting Ori...

Страница 32: ...8 9 on the pages following these figures A03209 Fig 37 Upflow Application Vent Elbow Right SEE NOTES 1 2 3 4 5 7 8 9 on the page following these figures A03210 Fig 38 Downflow Application Vent Elbow U...

Страница 33: ...low Application Vent Elbow Up then Right SEE NOTES 1 2 4 7 8 9 on the page following these figures A03213 Fig 42 Horizontal Left Application Vent Elbow Left SEE NOTES 1 2 4 5 7 8 9 on the page followi...

Страница 34: ...actory approved Downflow Vent Guard Kit is used in the downflow position See Product Data Sheet for accessory listing 4 Type B vent where required refer to Note 1 above 5 A 4 in 102 mm single wall 26...

Страница 35: ...SAFETY CHECK General FIRE HAZARD Failure to follow this warning could result in personal injury death or property damage This furnace is equipped with manual reset limit switches in the gas control ar...

Страница 36: ...Test Remove Blower Access Door Disconnect the thermostat R lead from furnace control board Manually close blower door switch Turn Setup DIP switch SW1 6 ON See Fig 26 55 and Table 52 NOTE The furnace...

Страница 37: ...per ton Adjust OFF Allows additional CFM per ton selections when used with SW 1 5 325 CFM per ton nominal when SW 4 3 ON and SW 1 5 OFF 350 CFM per ton nominal when SW 4 3 OFF and SW 1 5 OFF 370 CFM p...

Страница 38: ...rrect input rate 2 Determine the correct orifice and manifold pressure adjust ment All models in all positions use Table 12 22 000 Btuh per burner See input listed on rating plate a Obtain average yea...

Страница 39: ...meter b Move setup switch SW1 2 to ON position This keeps furnace locked in low heat operation c Jumper R to W W1 d Run furnace for 3 minutes in low heat operation e Measure time in sec for gas meter...

Страница 40: ...W W1 circuit Accurate amp draw readings can be obtained at the wires normally connected to ther mostat subbase terminals R and W The thermostat anticipator should NOT be in the circuit while measur in...

Страница 41: ...41 A13214 Fig 55 Wiring Diagram 314AAV...

Страница 42: ...23 157 313 783 66 54 109 273 24 150 300 750 68 53 106 265 25 144 288 720 70 51 103 257 26 138 277 692 72 50 100 250 27 133 267 667 74 48 97 243 28 129 257 643 76 47 95 237 29 124 248 621 78 46 92 231...

Страница 43: ...4 43 3 4 1 5 43 3 5 1 5 43 3 6 1 6 925 44 3 5 1 5 43 3 2 1 4 43 3 3 1 4 43 3 4 1 5 950 44 3 4 1 5 44 3 5 1 5 44 3 6 1 6 43 3 2 1 4 975 44 3 2 1 4 44 3 3 1 4 44 3 4 1 5 44 3 5 1 5 1000 45 3 7 1 6 45 3...

Страница 44: ...0 47 3 5 1 5 47 3 6 1 6 47 3 8 1 6 46 3 4 1 5 ALTITUDE RANGE FT M AVG GAS HEAT VALUE AT ALTITUDE BTUH CU FT SPECIFIC GRAVITY OF NATURAL GAS 0 58 0 60 0 62 0 64 Orifice No Manifold Pressure High Low Or...

Страница 45: ...surface igniter glows when inducer motor is disconnected shut down furnace immediately e Determine reason pressure switch did not function properly and correct condition f Turn off 115 v power to furn...

Страница 46: ...urrence 1 To retrieve status codes proceed with the following NOTE NO thermostat signal may be present at control and all blower OFF delays must be completed a Leave 115 v power to furnace turned on b...

Страница 47: ...vice as neces sary 4 Inspect burner compartment before each heating season for rust corrosion soot or excessive dust If necessary have furnace and burner serviced by a qualified service agency 5 Inspe...

Страница 48: ...and set screw contacts the flat portion of the motor shaft Loosen set screw on blower wheel and reposition if neces sary 12 Spin the blower wheel by hand to verify that the wheel does not rub on the h...

Страница 49: ...nd of spring cable and crimp tight with crimping tool or crimp by striking with ball peen hammer TIGHTNESS IS VERY IMPORTANT NOTE The materials needed in item 9 can usually be purchased at local hardw...

Страница 50: ...s based upon the stored history of the length of previous gas heating periods of the single stage thermostat The furnace will start up in either low or high heat If the furnace starts up in low heat t...

Страница 51: ...furnace control CPU will switch the inducer motor IDM speed from low to high The high heat pressure switch relay HPSR is de energized to close the NC contact When sufficient pressure is available the...

Страница 52: ...ll drop the blower airflow to 90 percent of low cooling airflow which is the true on board CF continuous fan selection as shown in Fig 53 b High cooling When the R to G and Y Y2 circuit is closed and...

Страница 53: ...stem problem in the case of a component fail ure To initiate the component test procedure ensure that there are no thermostat inputs to the control and all time delays have expired Turn on setup switc...

Страница 54: ...ransformer phasing Was there a previous status code other than 11 Is door switch closed Is there 115V going to switch Replace door switch Replace transformer Does the control respond to W W1 W2 Y1 Y Y...

Страница 55: ...at the ignition sequence 3 more times before lockout 14 occurs If flame signal is lost during the blower on delay period blower will come on for the selected blower off delay Check the following items...

Страница 56: ...PL4 is missing and there is no valid model stored in permanent memory This will happen if you forget to install the model plug PL4 on a service replacement control Thermostat call with SW1 1 ON Therm...

Страница 57: ...ATION ON PARTS Consult your installing dealer or classified section of your local telephone directory under Heating Equipment or Air Conditioning Contractors and Systems headings for dealer listing by...

Страница 58: ...tinue or change at any time specifications or designs without notice and without incurring obligations EBryant Heating Cooling Systems 7310 W Morris St Indianapolis IN 46231 Edition Date 09 13 Replace...

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