Carrier 58TMA operating instructions

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(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 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. 16 for thermostat connections.)

(1.) The thermostat closes R to G-and-Y1 circuits for low cooling or closes R to G-and-Y1-and-Y/Y2 circuits for high cooling. The R-Y1 circuits start outdoor unit on low-cooling speed, and R-G circuit starts furnace blower motor BLWM on low-cooling speed (same speed as for low-gas heat). The R to Y1-and-Y2 circuits start outdoor unit on high-cooling speed, and R to G-and-Y2 circuits start furnace blower motor BLWM on high-cooling speed.

NOTE: Y1 is not located on furnace control, but is found in outdoor unit. The furnace control CPU controls blower motor BLWM speed by sensing only G for low-cooling speed and Y/Y2 for high-cooling speed.

(2.) The EAC terminals EAC-1 and EAC-2 are energized with 115v when blower motor BLWM is operating on either cooling speed.

(3.) When thermostat is satisfied, R to G-and-Y1 or

Rto G-and-Y1-and-Y/Y2 circuits open. The outdoor unit stops, and furnace blower continues operating on cooling speed for an additional 90 sec.

4.Continuous Blower Mode

a.When R to G circuit is closed by thermostat, blower motor BLWM operates on low-gas-heat speed (identical to low- cool speed). Terminals EAC-1 and EAC-2 are energized with 115v as long as blower motor BLWM is energized.

b.During "call for heat," blower motor BLWM stops during ignitor warm-up (17 sec), ignition (7 sec), and blower on delay (45 sec), allowing furnace heat exchangers to heat up quickly.

(1.) The blower motor BLWM reverts to continuous blower speed after heating cycle is completed. In high-gas-heat, furnace control CPU holds blower mo- tor BLWM at high-gas-heat speed during selected blower off delay period before reverting to continuous blower speed.

(2.) When thermostat "calls for low cooling," blower motor BLWM continues to operate on low-cool speed. When thermostat is satisfied, blower motor BLWM continues on continuous blower speed.

(3.) When thermostat "calls for high cooling," blower motor BLWM operates on high-cool speed. When thermostat is satisfied, blower motor BLWM operates an additional 2 sec on high-cool speed before reverting back to continuous blower speed.

(4.) When R to G circuit is opened, blower motor BLWM continues operating for an additional 90 sec if no other function requires blower motor BLWM operation.

5.Heat Pump

NOTE: An accessory interface kit is required with single-speed heat pumps. See interface kit Installation Instructions for single- speed heat pump thermostat and interface connections. No inter- face kit is needed for 2-speed heat pumps. See 2-speed heat pump Installation Instructions for thermostat connections.

a.Single-Speed Heat Pump Cooling

(1.) The thermostat and interface kit close R to G-and- Y/Y2 circuit to start furnace blower motor BLWM on high-cooling speed. (Y/Y2 input to furnace control is necessary to provide adequate cooling airflow.)

(2.) The EAC terminals EAC-1 and EAC-2 are energized with 115v when blower motor BLWM is operating.

(3.) When thermostat is satisfied, furnace blower motor BLWM continues operating on high-cooling speed for an additional 90 sec.

b.Two-Speed Heat Pump Cooling

(1.) The thermostat R to G circuits start furnace blower motor BLWM on low-cooling speed. Thermostat R to G-and-Y/Y2 circuits start furnace blower motor BLWM on high-cool speed.

NOTE: The furnace control CPU controls blower motor BLWM speed by sensing only G (for low-cooling speed) and Y2 (for high-cooling speed).

(2.) The EAC terminals EAC-1 and EAC-2 are energized with 115v when blower motor BLWM is operating on either cooling speed.

(3.) When thermostat is satisfied, furnace blower motor BLWM continues operating on cooling speed for an additional 90 sec.

c.Single-Speed Heat Pump Heating

(1.) The thermostat and accessory interface kit R to G- and-Y/Y2 circuits start furnace blower motor BLWM on heat pump high-heat speed (identical to 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, furnace blower motor BLWM continues operating on heat pump high-heat speed for an additional 90 sec.

d.Two-Speed Heat Pump Heating

(1.) The thermostat closes R to G circuit for low heat and starts furnace blower motor BLWM on heat pump low-heat speed (identical to low-cooling speed). Clos- ing R-Y/Y2 circuit to furnace provides blower motor BLWM heat pump high-heat speed.

NOTE: The furnace control CPU controls blower motor BLWM speed by sensing only G (for heat pump low-heat speed) and Y2 (for heat pump high-heat speed).

(2.) The EAC terminals EAC-1 and EAC-2 are energized with 115v when blower motor BLWM is operating on either heating speed.

(3.) When thermostat is satisfied, R to G or R to G-and- Y2 circuits are opened. After opening R to G-and-Y2 circuit, the furnace blower motor BLWM continues operating on heating speed for an additional 90 sec.

(4.) Opening R-Y2 circuit reduces blower motor BLWM speed to heat pump low-heat speed.

6.Defrost

a.When furnace control R to W/W1-and-Y/Y2 circuits are closed, furnace control CPU continues blower motor

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Contents SUPPLY-AIR Plenum Installation Electrostatic Discharge ESD PrecautionsUnit Size Vent Conn SHIP. WT Dimensional Drawing DimensionsMinimum Inches Clearance to Combustible Construction Unconfined Space GeneralLocation Relative to Cooling Equipment Hazardous LocationsConfined Space Air for Combustion Ventilation from Outdoors → Downflow InstallationFurnace Plenum Opening Floor Opening Casing Installation on Combustible FloorFree Area Of Combustion Air Opening InputConstruct Working Platform Install Furnace→ -Horizontal Crawlspace Installation on Hanger Rods Typical Attic Installation→ -Horizontal Installation on Blocks Furnace Casing Width FiltersNominal Internal Length of Pipe FT Iron Pipe Diameter Size Accessories WiringSetup Switch Description Electrical DataAmps Gage FT‡ CKT BKR AMPS† Sequence of Operation → -Setup Switches on Control Center Factory SettingsDesired Heating Setup Switch Mode Blower OFF Delay SECConnection Diagram → -Unit Wiring DiagramPage Page Adjustments START-UP ProceduresCanada Altitude Derate Multiplier for U.S.AUnited States ExampleBTU/CU FT 725 1.6 625 1.4 → -Redundant Automatic Gas Control Valve Gas Rate Cu Ft/HrCheck Safety Controls Speed SelectionColor Speed AS Shipped Checklist Service Training

58TMA specifications

The Carrier 58TMA is a high-efficiency gas furnace designed to provide reliable heating solutions for residential spaces. As part of Carrier's extensive range of heating products, the 58TMA series exemplifies innovation in home comfort technology, offering advanced features that cater to both performance and energy savings.

One of the standout features of the Carrier 58TMA is its variable-speed blower motor. This technology allows for precise airflow control, ensuring consistent temperatures throughout the home while minimizing energy consumption. The variable-speed operation also contributes to quieter operation, enhancing indoor comfort without the disruptive noise commonly associated with traditional furnaces.

The furnace operates with a multi-stage gas valve, enhancing its efficiency. With the ability to modulate heating output based on demand, the 58TMA ensures that the home is heated only as needed. This not only improves energy efficiency but also maintains a more stable and comfortable indoor environment. The combination of the multi-stage gas valve and variable-speed blower results in significant energy cost savings for homeowners.

Another impressive aspect of the Carrier 58TMA is its high Annual Fuel Utilization Efficiency (AFUE) rating. With an AFUE of up to 96%, this gas furnace is engineered to convert a majority of the fuel it consumes into heat, reducing waste and lowering utility bills. Such efficiency ratings make the 58TMA an attractive option for eco-conscious consumers looking to minimize their carbon footprint.

In addition to efficiency and performance, the Carrier 58TMA is designed with durability in mind. The unit features a robust cabinet made from high-quality materials, along with an advanced heat exchanger that ensures long-lasting performance. Moreover, it comes equipped with an advanced electrical ignition system, providing reliable start-up under various conditions without the need for a pilot light.

For added convenience, the 58TMA can be integrated with Carrier's Smart Thermostat technology. This allows homeowners to monitor and adjust their heating settings remotely, facilitating an optimized comfort experience while further enhancing energy savings.

Overall, the Carrier 58TMA's combination of efficiency, advanced technology, and durability makes it a standout option in the market for homeowners seeking dependability and energy savings in their heating solutions. With its innovative features and user-friendly operation, the 58TMA represents a significant advancement in modern furnace design, providing peace of mind and comfort year after year.
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