Fan and Limit Control

Figure 18

CAUTION

This unit should not be used as a “con- struction heater” during the finishing phases of construction on a new struc- ture. This type of use may result in pre- mature failure of the unit due to extremely low return air temperatures and exposure to very dirty atmospheres.

WARNING

To avoid personal injury or death, always disconnect electrical power before in- specting or servicing the unit. All com- pressor protection devices reset auto- matically, energizing the contactor and outdoor fan.

Short Cycle Protector (Figure 19)

The short cycle protector is located in the blower com- partment. Each time the compressor shuts off for any reason, the short cycle protector will open. It will take about 3 to 4 minutes before the short cycle protector will reset and allow compressor startup to occur.

All wiring connected to the short cycle protector is 24V. If the compressor cycles on the short cycle protector without cycling on any of the other compressor protec- tion devices and before the call for cooling ends, com- mon causes include:

•Interruption of the line voltage power.

•Improper thermostat installation, defective thermo- stat wiring, or defective thermostat.

•Rapid adjustments of the room thermostat.

To Turn Off Unit

1.Set the thermostat to lowest setting.

2.Turn off the electrical power supply to the furnace.

3.Remove the right hand door on the front of the fur- nace by removing screws.

4.Turn the gas control valve knob to the OFF position. Do not force. See Figure 16.

5.Close manual gas shutoff valve external to the fur- nace.

6.Replace the door on the unit.

7.If cooling and/or air circulation will be desired, turn ON the electrical power.

Cooling Startup

Compressor Protection Devices

The PGC and PGB includes components which are de- signed to protect the compressor against abnormal op- erating conditions. These include the short cycle pro- tector, external compressor protector (PGC24-42, 60 and PGB58 only), and high pressure cutout.

These controls reset automatically. Excessive cycling of the controls should be investigated before continuing operation.

(NOTE: The operation of the indoor blower will not be affected by any of the above compressor protection de- vices.)

Short Cycle

Protector

Figure 19

Short Cycle Protector Location

High Pressure Cutout (Figure 20)

An automatic reset high pressure control is located in the compressor discharge line. (See Figure 20) This control protects the unit from excessively high refriger- ant pressure.

High pressures can result from:

•Inoperative outdoor fan motor.

•Outdoor coil restricted with debris.

•Recirculation of hot condenser air.

•Overcharge of refrigerant.

PGB58B, PGC(24-60)B specifications

Amana, a trusted name in heating and cooling, offers several high-efficiency gas furnace models, including the PGC(24-60)B and PGB58B. These furnaces combine innovation, reliability, and advanced technology to provide an optimal heating solution for any home.

One of the standout features of the Amana PGC(24-60)B is its modulating heating capability. This technology allows the furnace to operate at different heating levels based on the home’s demands. Instead of simply turning on and off, the PGC adjusts its output to maintain a consistent temperature, promoting energy efficiency and comfort. This not only reduces energy consumption but also minimizes temperature fluctuations, providing a more comfortable indoor environment.

The PGB58B model is designed with a focus on efficiency, boasting an Annual Fuel Utilization Efficiency (AFUE) rating of up to 96%. This means that a higher percentage of the fuel used is converted into heat, making it one of the most efficient choices available. The combination of high-efficiency design and advanced components makes the PGB58B an excellent option for homeowners looking to reduce their energy bills while enjoying reliable heating performance.

Both models come equipped with a durable casing, ensuring longevity and performance. The rust-resistant and heavy-gauge steel construction protects against harsh weather conditions, making them suitable for various climates. Additionally, they feature a multi-speed blower motor, which optimizes airflow and enhances comfort by evenly distributing warm air throughout the home.

Advanced diagnostics and self-monitoring capabilities are integral to these models. The built-in diagnostic system enables quick identification of performance issues, allowing for timely maintenance and reducing repair costs. Furthermore, these furnaces are designed to be compatible with smart home technology, allowing homeowners to control their heating systems remotely and maximize energy efficiency.

In summary, the Amana PGC(24-60)B and PGB58B gas furnaces stand out for their innovative features and commitment to energy efficiency. With modulating heating, high AFUE ratings, durable construction, and smart technology compatibility, they offer reliable heating solutions that ensure comfort while keeping energy costs low. Homeowners can feel confident in their investment, knowing they have chosen a furnace that prioritizes both performance and sustainability.

Amana PGC(24-60)B, PGB58B Fan and Limit Control, Short Cycle Protector Location

Models: PGB58B PGC(24-60)B