Amana PGC(24-60)B Heating Sequence of Operations PGB & PGC, XI. Cooling Sequence of Operations

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X. Heating Sequence of Operations PGB & PGC)

Normal Sequence of Operation - Heating

See Figure 12

1.Thermostat calls for heat. The combustion blower is immediately energized.

2.The pressure switch contacts transfer.

3.The ignitor is energized and allowed to preheat for 38 seconds.

4.The gas valve is energized delivering gas to the burners and starting combustion.

5.The control checks the signal from the flame sen- sor. Gas flow will continue only if a proper signal is present within seven seconds after the gas valve opens. As soon as flame is proven, the ignitor is de- energized.

6.The unit will continue to fire while the helical fan control heats up. The fan control will start the main circulating air blower approximately 75 seconds af- ter the gas valve opens (this time may vary depend- ing on the control setting).

7.The furnace will deliver heat to the conditioned space until the thermostat is satisfied.

8.The gas valve and combustion blower will be de- energized when the thermostat opens.

9.There is a 90 second delay (approximate) before the main air blower stops. This allows any additional heat in the heat exchanger to be transferred to the conditioned space.

XI. Cooling Sequence of Operations

PGB Normal Sequence of Operations - Cooling

See Figure 13A

1.Thermostat calls for cooling. The compressor and outdoor fan are energized.

2.Approximately 15 seconds later, the fan time delay relay closes. The indoor fan now begins operation.

3.The unit will deliver cooling to the conditioned space until the thermostat is satisfied.

4.The compressor and outdoor fan will be de-ener- gized when the thermostat opens. It is normal for the scroll compressor to produce a short burping sound at this time as its internal pressures are equal- ized.

5.Refrigerant will continue to flow through the capil- lary tube (sizes 24 to 42) until the high and low side pressures are approximately equal. Refrigerant will continue to flow through the thermal expansion valve until the high and low side pressures are approxi- mately 50 PSI apart.

6.The indoor fan continues to run for approximately 45 seconds after the thermostat is satisfied. This allows additional cooling from the indoor coil to be transferred to the conditioned space.

PGC Normal Sequence of Operations - Cooling

See Figure 13B

1.Thermostat calls for cooling. The compressor, in- door fan, and outdoor fan are energized.

2.Approximately 30 seconds later, the indoor fan ramps up to full speed.

3.The unit will deliver cooling to the conditioned space until the thermostat is satisfied.

4.The compressor and outdoor fan will be de-ener- gized when the thermostat opens. It is normal for the scroll compressor to produce a short burping sound at this time as its internal pressures are equal- ized. (The PGC48 has a piston compressor. All other PGC and PGB have scroll compressors.)

5.Refrigerant will continue to flow through the capil- lary tube (sizes 24 to 42) until the high and low side pressures are approximately equal. For the PGC48, 60 and PGB58 refrigerant will continue to flow through the thermal expansion valve until the high and low side pressures are approximately 50 PSI apart.

6.The indoor fan continues to run for approximately 30 seconds after the thermostat is satisfied. This allows additional cooling from the indoor coil to be transferred to the conditioned space. Then, the in- door fan ramps down in 30 seconds to the OFF con- dition.

XIl. Startup and Adjustment

Heating Startup

General Information

This furnace is equipped with an electronic ignition de- vice which lights the burners. It also has a power vent blower to exhaust combustion products.

On new installations, or if a major part such as the gas valve, pressure switch or fan/limit control has been re- placed, the operation of the furnace must be checked.

Check furnace operation as outlined in the following in- structions. If any sparking, odors, or unusual noises are encountered, shut off electrical power and recheck for wiring errors, or obstructions in or near the blower mo- tors. Various shipping materials must be removed be- fore the indoor and outdoor fans can be operated.

Heat Anticipator Setting

The heat anticipator in the room thermostat must be correctly adjusted to obtain the proper number of heat- ing cycles per hour and to prevent the room tempera- ture from over-shooting the room thermostat setting. Heat anticipator must be set at 0.8 amps.

Roll-out Protection Control

If the flames from the burners are not properly drawn into the heat exchanger, a protection device will open, causing the gas valve to close. The protection device is located on the manifold assembly (Figure 14).

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Contents Table of Contents PGB58BUnit Specifications Gas Pack SpecificationsHeating TEV PGC Temperature Rise Table PGB CFM& Temperature Rise vs. External Static Pressure TableTo The Owner II. Safety InformationTo The Installer If you smell gasRooftop Installations Only All InstallationsGround Level Installations Only III. General InformationRequired Clearances For All Installations IV. Rigging and Handling Transportation DamageLocating The Thermostat Connecting The Gas Piping Natural Gas Gas PipingGas Piping Proper Piping Practice Checking The Gas PipingTanks And Piping for Propane Gas Units Vl. Electrical Wiring Unit Voltage Heat Anticipator SettingVll. Circulating Air and Filters Airflow ConversionTypical Wiring Rooftop Typical Electrical WiringFilter Access Door Filter InstallationFilters Air Inlet Hood and Flue Hood VIII. Flue VentIX. Condensate Drain Typical Condensate DrainTiming Chart for Normal Robertshaw Operation PGB & PGC PGB Timing Chart for Normal Cooling OperationPGC Timing Chart for Normal Cooling Operation XIl. Startup and Adjustment Heating Sequence of Operations PGB & PGCXI. Cooling Sequence of Operations Position of Limit Control Gas Valve Reset After Lock-outRollout Protection Shown Without Heat Shield Operating Instructions HeatingMeasuring Inlet Gas Pressure Alternate Method Changing Blower Speeds PGB Units Checking External Static PressureChanging Blower Speeds PGC Units Check Limit And Fan ControlFan and Limit Control Short Cycle Protector LocationReciprocating Compressor High Pressure Protection DevicesScroll Compressors Operating Instructions coolingXIII. Maintenance Blower Motor and HousingInduced Draft Motor Removal of Fan MotorFunctional Parts List XIV. Accessories and Functional PartsAccessory List Transition Kit Pressure DropXV. Typical Cooling Performance Data PGCPsig XVI. Wiring Diagram PGC24PGC PGC Volt Installation PGB G R

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.
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