Carrier 58TMA Speed Selection, Check Safety Controls, Color Speed AS Shipped

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Table 12—Speed Selection

COLOR

SPEED

AS SHIPPED

White

Common

COM

Black

High

Cool

Yellow

Med-High

SPARE

Orange†

Med

SPARE or Capped

Blue

Med-Low

High-Gas-Heat

Red

Low*

Low-Gas-Heat

* Continuous fan speed.

† Available on 5-speed blowers only.

Recheck temperature rise. It must be within limits specified on unit rating plate. Recommended operation is at midpoint of rise range or above.

THERMOSTAT SUBBASE TERMINALS WITH THERMOSTAT REMOVED (ANITICIPATOR, CLOCK, ETC.,

MUST BE OUT OF CIRCUIT.)

HOOK-AROUND AMMETER

R Y W G

10 TURNS

FROM UNIT 24-V

CONTROL TERMINALS

EXAMPLE:

5.0 AMPS ON AMMETER

=

0.5 AMPS FOR THERMOSTAT

10 TURNS AROUND JAWS

ANTICIPATOR SETTING

 

 

A96316

Fig. 21—Amp Draw Check With Ammeter

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, first move SW-2 to ON position, THEN connect ammeter wires as shown in Fig. 21. The thermostat anticipator should NOT be in this circuit while measuring current. If thermostat has no subbase, thermostat MUST be disconnected from R and W/W1 wires during current measurement. Return SW-2 to final desired location after completing reading. See thermostat manufacturer’s instruc- tions for adjusting heat anticipator and for varying heating cycle length.

b.When using an electronic thermostat, set cycle rate for 3 cycles per hr.

CHECK SAFETY CONTROLS

The flame sensor, gas valve, and pressure switches were all checked in the Start-Up section as part of normal operation.

1.Check primary limit control.

This control shuts off combustion control system and ener- gizes circulating-air blower motor if furnace overheats.

The preferred method of checking limit control is to gradually block off return air after furnace has been operating for a period of at least 5 minutes. As soon as limit has shut off burners, return-air opening should be unblocked. By using this method to check limit control, it can be established that the limit is functioning properly and will operate if there is a motor failure.

2.Check draft safeguard switch.

The purpose of this control is to permit safe shutdown of he furnace during certain blocked vent conditions.

a.Disconnect power to furnace and remove vent connector from furnace flue collar. Be sure to allow time for vent connector pipe to cool down before removing.

b.Restore power to furnace and set room thermostat above room temperature.

c.After normal start-up, allow furnace to operate for 2 minutes, then block flue outlet 100 percent. Furnace should cycle off within 2 minutes.

d.Remove blockage and reconnect vent connector to furnace flue collar.

e.Wait 5 minutes and then reset draft safeguard switch.

3.Check flow-sensing pressure switches.

This control proves operation of draft inducer blower.

a.Turn off 115-v power to furnace.

b.Remove gas control door and disconnect inducer motor lead wires from wire harness.

c.Turn on 115-v power to furnace

d.Close thermostat switch as if making normal furnace start. If hot surface ignitor does not glow within several minutes and control flashes code 32, pressure switches are func- tioning properly.

e.Turn off 115-v power to furnace.

f.Reconnect inducer motor wires, replace gas control door, and turn on 115-v power to furnace.

4.Check auxiliary limits.

a.Turn off 115-v power to furnace.

b.Remove blower access door.

c.Disconnect red motor lead at blower speed selector. Mark terminal for proper reconnection.

d.Replace blower access door.

e.Turn on 115-v power to furnace. Be sure room thermostat is calling for low heat.

f.Allow furnace to operate until auxiliary limit activates, but DO NOT operate furnace longer than 4 minutes.

g.If furnace operates for 4 minutes, check/replace limit switch(es).

h.Turn off 115-v power to furnace.

i.Remove blower access door.

j.Reconnect red motor lead, reset switch, and replace door.

k.Turn on 115-v power to furnace.

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Contents Electrostatic Discharge ESD Precautions SUPPLY-AIR Plenum InstallationDimensional Drawing Dimensions Unit Size Vent Conn SHIP. WTMinimum Inches Clearance to Combustible Construction Hazardous Locations GeneralLocation Relative to Cooling Equipment Unconfined Space→ Downflow Installation Confined Space Air for Combustion Ventilation from OutdoorsInput Installation on Combustible FloorFree Area Of Combustion Air Opening Furnace Plenum Opening Floor Opening CasingInstall Furnace Construct Working PlatformTypical Attic Installation → -Horizontal Crawlspace Installation on Hanger RodsFurnace Casing Width Filters → -Horizontal Installation on BlocksNominal Internal Length of Pipe FT Iron Pipe Diameter Size Wiring AccessoriesElectrical Data Setup Switch DescriptionAmps Gage FT‡ CKT BKR AMPS† Delay SEC → -Setup Switches on Control Center Factory SettingsDesired Heating Setup Switch Mode Blower OFF Sequence of Operation→ -Unit Wiring Diagram Connection DiagramPage Page START-UP Procedures AdjustmentsExample Altitude Derate Multiplier for U.S.AUnited States CanadaBTU/CU FT 725 1.6 625 1.4 Gas Rate Cu Ft/Hr → -Redundant Automatic Gas Control ValveSpeed Selection Check Safety ControlsColor 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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