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Carrier 58TMA - page 1
58TMA Downflow/Horizontal 2-Speed, 2-Stage, Induced-Combustion Gas Furnace Installation, Start-Up, and Operating Instructions Sizes 065-125, Series 111 NOTE: Read the entire instruction manual before starting the installation. This symbol → indicates a change since the last issue. Index Page SAFETY CONSIDERATIONS ................................. ...
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Carrier 58TMA - page 2
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS PROCEDURE Electrostatic discharge can affect electronic components. Take precautions during furnace installation and servicing to protect the furnace electronic control. Precautions will pre- vent electrostatic discharges from personnel and hand tools which are held during the procedure. These precautions w ...
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Carrier 58TMA - page 3
in alcoves, attics, crawlspaces, basements, closets, or utility rooms. The design of this furnace line is not A.G.A./C.G.A. certified for installation in mobile homes, recreation vehicles, or outdoors. Before installing the furnace, refer to the current edition of the NFGC and the NFPA 90B. Canadian installations must be installed in accordance NSC ...
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Carrier 58TMA - page 4
Improper installation, adjustment, alteration, service, mainte- nance, or use can cause carbon monoxide poisoning, explo- sion, fire, electrical shock, or other conditions which may cause personal injury, loss of life, or property damage. Consult a qualified installer, service agency, local gas sup- plier, or your distributor or branch for informat ...
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Carrier 58TMA - page 5
installed in that space. A confined space MUST have provisions for supplying air for combustion, ventilation, and dilution of flue gases using 1 of the following methods. (See Fig. 3 and Table 2.) NOTE: In determining free area of an opening, the blocking effect of louvers, grilles, and screens must be considered. If free area of louver or grille d ...
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Carrier 58TMA - page 6
KGASB0201ALL is used. Manufacturer’s accessory floor base is not required when this furnace is installed on manufacturer’s Coil Assembly Part No. CD5 or CK5, or Coil Box Part No. KCAKC is used. 1. Determine application being installed from Table 3. 2. Construct hole in floor per dimensions specified in Table 3 and Fig. 5. 3. Construct plenum to ...
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Carrier 58TMA - page 7
2. When completed, downflow subbase, plenum, and furnace (or coil casing when used) should be installed as shown in Fig. 6. Step 4—Horizontal Attic Installation Do not install furnace on its back; safety control operation will be adversely affected. Never connect return-air ducts to the sides or back of the furnace. A failure to follow this warni ...
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Carrier 58TMA - page 8
→ Fig. 9—Horizontal Crawlspace Installation on Hanger Rods A96633 NOTES: ANGLE IRON OR EQUIVALENT ROD LOCATION USING DIMPLE LOCATORS (SEE DIMENSIONAL DWG FOR LOCATIONS) 3 ⁄ 8 -IN. ROD 1. A 1 In. clearance minimum between top of furnace and combustible material. 2. The entire length of furnace must be supported when ...
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Carrier 58TMA - page 9
If flexible connector is required or allowed by authority having jurisdiction, black iron pipe shall be installed at gas valve and extend a minimum of 2 in. outside furnace casing. 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 inj ...
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Carrier 58TMA - page 10
Step 8—Electrical Connections 115-V WIRING Refer to unit rating plate or Table 6 for equipment electrical requirements. The control system requires an earth ground for proper operation. Do not connect aluminum wire between disconnect switch and furnace. Use only copper wire. Make all electrical connections in accordance with the current edition o ...
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Carrier 58TMA - page 11
This furnace can be installed with either single-stage heating or 2-stage heating thermostat. For single-stage thermostats, connect thermostat W to W/W1 at furnace control terminal block. (See Fig. 15.) For single-stage thermostats the control determines, based on length of previous heating on and off cycles, when to operate in low- and high-gas he ...
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Carrier 58TMA - page 12
his furnace is equipped with 2 manual reset limit switches in gas control area. The switches will open and shut off power to gas valve if a flame rollout or an overheating condition occurs in gas control area. DO NOT bypass switches. Correct inadequate combustion air supply, component failure, re- stricted flue gas passageway before resetting switc ...
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Carrier 58TMA - page 13
→ Fig. 18—Unit Wiring Diagram A97508 LEGEND ALS1 AUXILIARY LI MIT SWITCH, OVERTEMP. MANUAL RES ET, SPST (N. C.) ALS2 AUXILIARY LI MIT SWITCH, OVERTEMP. AUTO RESET, SPST (N.C. ) BHI / LOR BL OWER MOTOR SPEED CHANG E RELAY, SPDT BHT / CLR BLOWER MOTOR SPEED CHANGE RELAY , SPDT BLWM BLOWER MOTOR, 4 or 5 -S PEED, PERMANEN T-SPLIT-CAPAC ITOR BLWR BL ...
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Carrier 58TMA - page 14
The furnace starts up in either low- or high-gas heat. If furnace starts up in low-gas heat, control CPU determines low-gas heat on time (from 0 to 16 minutes) which is permitted before switching to high-gas heat. If power is interrupted, stored history is erased, and control CPU selects low-gas heat for up to 16 minutes and then switches to high-g ...
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Carrier 58TMA - page 15
(1.) The thermostat closes R to G-and-Y circuits. The R-Y circuit starts outdoor unit, and R to G-and-Y circuits start furnace blower motor BLWM on high- cool speed. (2.) The EAC terminals EAC-1 and EAC-2 are energized with 115v when blower motor BLWM is operating. (3.) When thermostat is satisfied, R to G-and-Y circuits are opened. The outdoor uni ...
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Carrier 58TMA - page 16
BLWM operation at heat pump heating speed until end of prepurge period, then shuts off until end of HSI ignitor on period (22 sec). 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 describ ...
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Carrier 58TMA - page 17
e. Move setup switch SW-2 to OFF position after completing low-heat adjustment. f. Jumper R and W2 thermostat connections on control center. (See Fig. 14.) This keeps furnace locked in high-heat operation. g. Turn high-heat adjusting screw (5/64 hex Allen wrench) counterclockwise (out) to decrease input rate or clockwise (in) to increase rate. NOTE ...
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Carrier 58TMA - page 18
Table 10—Model 58TMA 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 0.58 0.60 0.62 0.64 0.66 Orifice No. Manifold Pressur ...
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Carrier 58TMA - page 19
Table 10—Model 58TMA 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 0.58 0.60 0.62 0.64 0.66 Orifice No. Mani ...
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Carrier 58TMA - page 20
Table 10—Model 58TMA 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 0.58 0.60 0.62 0.64 0.66 Orifice No. Mani ...
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Carrier 58TMA - page 21
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. This is particularly important with straight-run ducts. b. When thermometer readings stabilize, subtract return-air temperature from supply-air temperature to d ...
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Carrier 58TMA - page 22
components in R-W/W1 circuit. Accurate amp draw read- ings can be obtained at wires normally connected to thermostat subbase terminals R and W/W1. Fig. 21 illus- trates an easy method of obtaining actual amp draw. The amp reading should be taken after blower motor has started and furnace is operating in low heat. To operate furnace in low heat, fir ...
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Carrier 58TMA - page 23
CHECKLIST 1. Put away tools and instruments, and clean up debris. 2. Check SW-1 through SW-4 after completing installation to ensure desired settings for thermostat type (SW-1 and SW-2) and blower off delay (SW-3 and SW-4). Refer to Tables 6 and 7. 3. Verify manual reset switches have continuity. 4. Ensure blower and gas control access doors are pr ...
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Carrier 58TMA - page 24
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 • Maintenance • Installation Ov er vie w • Operating Sequence A large selection of product, theor y , and skills prog rams is av ailable , using popul ...
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