Bryant 120 - Manuals

5 60 80 A04036 Fig. 3 -- Return Air Temperature 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 other codes. In absence of local c...

6 THE BLOWER IS LOCATED TO THE RIGHT OF THE BURNER SECTION, AND AIR CONDITIONED AIR IS DISCHARGED TO THE LEFT. THE BLOWER IS LOCATED BELOW THE BURNER SECTION, AND CONDITIONED AIR IS DISCHARGED UPWARD. THE BLOWER IS LOCATED ABOVE THE BURNER SECTION, AND CONDITIONED AIR IS DISCHARGED DOWNWARD THE BLOW...

7 FIRE, INJURY OR DEATH HAZARD Failure to follow this warning could result in personal injury, death, and/or property damage.When the furnace is installed in a residential garage, the burners and ignition sources must be located at least 18 inches above the floor. The furnace must be located or prot...

8 equipped with means to prevent operation of either unit unlessthe damper is in the full--heat or full--cool position. AIR FOR COMBUSTION AND VENTILATION Provisions for adequate combustion, ventilation, and dilution air must be provided in accordance with:U.S. installations: Section 8.3 of the NFGC...

10 Table 3 – Minimum Space Volumes for 100% Combustion, Ventilation, and Dilution from Indoors ACH OTHER THAN FAN --- ASSISTED TOTAL (1,000s BTUH GAS INPUT RATE) FAN --- ASSISTED TOTAL (1,000s BTUH GAS INPUT RATE) 30 40 50 44 66 88 110 132 154 Space Volume (ft 3) 0.60 1,050 1,400 1,750 1,100 1,650 2...

12 underneath furnace must be level and the furnace set on blocks orbricks. Roll--Out Protection Provide a minimum 17--3/4 in. X 22 in. piece of sheet metal for flame roll--out protection in front of burner area for furnacescloser than 12 inches above the combustible deck or suspended furnaces close...

15 30-IN. MIN WORK AREA 6 ″ MIN* TYPE-B VENT 17 3 / 4 ″ 22 ″ SHEET METAL SEDIMENT TRAP EQUIPMENT MANUAL SHUT-OFF GAS VALVE LINE CONTACT ONLY PERMISSIBLE BETWEEN LINES FORMED BY INTERSECTIONS OF THE TOP AND TWO SIDES OF THE FURNACE JACKET AND BUILDING JOISTS, STUDS, OR FRAMING. GAS ENTRY 17 3 / 4 ″ O...

20 Gas piping must be installed in accordance with national andlocal codes. Refer to current edition of NFGC in the U.S. and the CAN/CSA--B149.1--05 in Canada. Table 6 – Maximum Capacity of Pipe* NOMINAL IRON PIPE SIZE (IN.) INTERNAL DIAMETER (IN.) LENGTH OF PIPE (FT) 10 20 30 40 50 1/2 0.622 175 12...

21 115-VOLT FIELD- SUPPLIED FUSED DISCONNECT JUNCTION BOX CONTROL BOX 24-VOLT TERMINAL BLOCK THREE-WIRE HEATING- ONLY FIVE WIRE NOTE 2 NOTE 1 1-STAGE THERMOSTAT TERMINALS FIELD-SUPPLIED FUSED DISCONNECT CONDENSING UNIT FURNACE COM R W C Y R G GND GND FIELD 24-VOLT WIRING FIELD 115-, 208/230-, 460-VO...

22 Table 7 – Electrical Data VOLTS --- HERTZ --- PHASE OPERATING VOLTAGE RANGE MAX UNIT AMPS FURNACE SIZE UNIT AMPACITY# MAXIMUM WIRE LENGTH (ft)‡ MAXIMUM FUSE OR CKT BKR AMPS† MINIMUM WIRE GAUGE MAX* MIN.* 115 --- 60 --- 1 127 104 5.3 045 --- 08/024045 7.42 49 15 14 115 --- 60 --- 1 127 104 7.1 045...

23 6. Reinstall cover to J--Box. Do not pinch wires between cover and bracket. Electrical Box on Furnace Casing Side. See Fig. 26. FIRE OR ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury, death, or property damage.If field--supplied manual disconnect switch is ...

24 See notes 2, 5, 8, 10, 11 and 12 on the page following these figures A03179 Fig. 27 -- Two--Stage Furnace with Two--Speed Air Conditioner See notes 1, 2, 4, 6, 7, 9, 10, 11, and 15 on the page following these figures A03180 Fig. 28 -- Two--Stage Furnace with Single--Speed Heat Pump (Dual Fuel) Se...

26 ACCESSORIES 1. Electronic Air Cleaner (EAC) Connect an accessory Electronic Air Cleaner (if used) using 1/4--in female quick connect terminals to the twomale 1/4--in quick--connect terminals on the control board marked EAC--1 and EAC--2. The terminals are rated for115VAC, 1.0 amps maximum and are...

27 CARBON MONOXIDE POISONING HAZARD Failure to follow this warning could result in personal injury or death.Failure to follow the steps outlined below for each appliance connected to the venting system being placed into operation could result in carbon monoxide poisoning or death. The following step...

28 CHIMNEY INSPECTION CHART For additional requirements refer to the National Fuel Gas Code NFPA 54/ANSI Z223.1 and ANSI/NFPA 211 Chimneys, Fireplaces, Vents, and Solid Fuel Burning Appliances in the U.S.A. or to the Canadian installation Code CSA-B149.1 in Canada. Consult Part C of chimney adapter ...

29 The Chimney Adapter Kit is a listed alternative venting systemfor these furnaces. See the kit instructions for complete details. Canada (and U.S.A.) --This furnace is permitted to be vented into a clay tile--lined masonry chimney that is exposed to the outdoors below the roof line, provided: 1. V...

30 causing condensation and corrosion in the furnace and/orventing system. Derating is permitted only for altitudes above 2000 ft 3. Adjust the air temperature rise to the midpoint of the rise range or slightly above. Low air temperature rise can cause low vent gas temperature and potential for cond...

31 SEE NOTES: 1,2,4,5,7,8,9 on the page following these figures A03211 Fig. 39 -- Downflow Application--Vent Elbow Up SEE NOTES: 1,2,4,5,6,7,8,9,10 on the page following these figures A03207 Fig. 40 -- Downflow Application--Vent Elbow Left then Up SEE NOTES:1,2,3,4,5,7,8,9 on the page following thes...

33 Caution!! For the following applications, use the minimum vertical heights as specified below. For all other applications, follow exclusively the National Fuel Gas Code FURNACE ORIENTATION VENT ORIENTA- TION FURNACE IN- PUT(BTUH/HR) MINIMUM VENT DIAMETER (IN.)* MINIMUM VERTICAL VENT HEIGHT (FT)**...

34 A04128 Fig. 50 -- Rounded End of Knockout A04129 Fig. 51 -- Knockout Pulled Loose A04130 Fig. 52 -- Hammer and Screwdriver Used for Knockout A04131 Fig. 53 -- Remove Knockout with Hammer BURN HAZARD Failure to follow this caution may cause personal injury.Hot vent pipe is within reach of small ch...

35 In Canada: Per section 8.24.2 of the CAN/CSA--B149.1--05, any listed mechanical venter may be used, when approved by the authority having jurisdiction.Select the listed mechanical venter to match the Btuh input of the furnace being vented. Follow all manufacturer s installation requirements for v...

36 Table 10 – 2--Stage Furnace Setup Switch Description SETUP SWITCH NO. SWITCH NAME NORMAL POSITION DESCRIPTION OF USE SW --- 1 Adaptive Heat Mode OFF When OFF, allows 2 --- stage operation with a single stage thermostat. Turn ON when using 2 stage thermostat to allow Low Heat opera --- tion when R...

37 a. Turn gas valve ON/OFF switch to OFF. b. Remove manifold pressure tap plug from gas valve. c. Connect a water column manometer or similar device to manifold pressure tap. d. Turn gas valve ON/OFF switch to ON. e. Move setup switch LHT (SW--1) on furnace control to ON position to lock furnace in...

38 Table 12 – Gas Rate (cu ft/hr) SECONDS FOR 1 REVOLUTION SIZE OF TEST DIAL SECONDS FOR 1 REVOLUTION SIZE OF TEST DIAL 1 C U F T 2 C U F T 5 C U F T 1 C U F T 2 C U F T 5 C U F T 10 360 720 1800 50 72 144 360 11 327 655 1636 51 71 141 355 12 300 600 1500 52 69 138 346 13 277 555 1385 53 68 136 340 ...

39 If clocked rate does not match required input from Step 1,increase manifold pressure to increase input or decrease manifold pressure to decrease input. Repeat steps b through e until correcthigh heat input is achieved. Re--install high--heat regulator seal cap on gas valve. 8. Set high heat tempe...

40 Table 14 – 2--Stage Furnace Blower OFF delay Setup Switch DESIRED HEATING MODE BLOWER OFF DELAY (SEC.) SETUP SWITCH SW --- 2 SETUP SWITCH SW --- 3 90 OFF OFF 120 OFF ON 150 ON OFF 180 ON ON R Y W G 10 TURNS THERMOSTAT SUBBASE TERMINALS WITH THERMOSTAT REMOVED (ANITICIPATOR, CLOCK, ETC., MUST BE O...

41 Step 5 — Checklist 1. Put away tools and instruments. Clean up debris.2. Verify that switches for LHT and OFF--DELAY are blower OFF--DELAY are selected as desired. 3. Verify that blower and burner access doors are properly installed. 4. Cycle test furnace with room thermostat.5. Check operation o...

42 Table 15 – Orifice Size and Manifold Pressure for Gas Input Rate (Tabulated Data Based on 22,000 Btuh High--Heat/14,500 Btuh for Low--Heat per Burner, Derated 4% for Each 1000 Ft Above Sea Level) ALTITUDE RANGE (FT) AVG. GAS HEAT VALUE (BTUH/CU FT) SPECIFIC GRAVITY OF NATURAL GAS 0.58 0.60 0.62 0...

44 Table 16 – Orifice Size and Manifold Pressure for Gas Input Rate (Tabulated Data Based on 21,000 Btuh High--Heat/14,500 Btuh for Low--Heat Per Burner, Derated 4% for Each 1000 Ft Above Sea level) ALTITUDE RANGE (FT) AVG. GAS HEAT VALUE (BTUH/CU FT) SPECIFIC GRAVITY OF NATURAL GAS 0.58 0.60 0.62 0...

45 Table 16 -- Orifice Size and Manifold Pressure for Gas Input Rate (cont.) (Tabulated Data Based on 21,000 Btuh High--Heat/14,500 Btuh for Low--Heat Per Burner, Derated 4% for Each 1000 Ft Above Sea level) ALTITUDE RANGE (FT) AVG. GAS HEAT VALUE AT ALTITUDE (BTUH/CU FT) SPECIFIC GRAVITY OF NATURAL...

46 UNIT OPERATION HAZARD Failure to follow this caution may result in improper unit operation or failure of unit components.Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. CAUTION ! Step 1 — Introduction GENERAL These instruct...

47 CUT HAZARD Failure to follow this caution may result in personal injury.Sheet metal parts may have sharp edges or burrs. Use care and wear appropriate protective clothing, safety glasses and gloves when handling parts and servicing furnaces. CAUTION ! The minimum maintenance on this furnace is as...

50 16. Reinstall control box assembly in furnace. UNIT DAMAGE HAZARD Failure to follow this caution may result in shortened heat exchanger life.Heating fan speed(s) MUST be adjusted to provide proper air temperature rise as specified on the rating plate. Recommended operation is at the midpoint of t...

51 a. Remove metal screw fitting from wire brush to allow insertion into cable. b. Insert the twisted wire end of brush into end of spring cable, and crimp tight with crimping tool or crimp bystriking with ball--peen hammer. TIGHTNESS IS VERY IMPORTANT. NOTE : The materials needed in item 9 can usua...

52 control CPU, transformer TRAN, inducer motor IDM, blowermotor BLWM, hot--surface igniter HSI, and gas valve GV. 1. Two--Stage Heating (Adaptive mode) with Single--Stage Thermostat (See Fig. 24 or 33 for thermostat connections) NOTE : The low--heat only switch (LHT) selects either the low--heat on...

54 b. High cooling --When the R--to--G--and--Y/Y2 circuit is closed and there is a demand for dehumidification,the furnace blower motor BLWM will drop the blower speedfrom COOL to HI HEAT for a maximum of 10 minutesbefore reverting back to COOL speed. If there is still a demand for dehumidification ...

55 Is LED status light on? Is LED status light b linking r apidly without a pause? Is LED status light b linking ON/OFF slo wly with a combination of shor t and long flashes? Deter mine status code . The status code is a 2 digit n umber with the first digit deter mined by the n umber of shor t flash...