Allied Air Enterprises Complete Guide to A95UH Furnace Operation and Maintenance
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Priming Condensate Trap

The condensate trap should be primed with water prior to start-up to ensure proper condensate drainage. Either pour 10 fl. oz. (300 ml) of water into the trap, or follow these steps to prime the trap:

1.Follow the lighting instructions to place the unit into operation.

2.Set the thermostat to initiate a heating demand.

3.Allow the burners to fire for approximately 3 minutes.

4.Adjust the thermostat to deactivate the heating demand.

5.Wait for the combustion air inducer to stop. Set the thermostat to initiate a heating demand and again allow the burners to fire for approximately 3 minutes.

6.Adjust the thermostat to deactivate the heating demand and wait for the combustion air inducer to stop. At this point, the trap should be primed with sufficient water to ensure proper condensate drain operation.

WARNING

If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or death.

Gas Valve Operation (Figure 55)

1.STOP! Read the safety information at the beginning of this section.

2.Set the thermostat to the lowest setting.

3.Turn OFF all electrical power to the unit.

4.This furnace is equipped with an ignition device which automatically lights the burners. Do not try to light the burners by hand.

5.Remove the upper access panel.

6.Move gas valve switch to OFF. See Figure 55.

7.Wait five minutes to clear out any gas. If you then smell gas, STOP! Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions. If you do not smell gas go to next step.

8.Move gas valve switch to ON. See Figure 55.

GAS VALVE SHOWN IN ON POSITION

Figure 55

9.Replace the upper access panel.

10.Turn on all electrical power to the unit.

11.Set the thermostat to desired setting.

NOTE: When unit is initially started, steps 1 through 11 may need to be repeated to purge air from gas line.

12.If the appliance will not operate, follow the instructions “Turning Off Gas to Unit” and call your service technician or gas supplier.

Turning Off Gas to Unit

1.Set the thermostat to the lowest setting.

2.Turn off all electrical power to the unit if service is to be performed.

3.Remove the upper access panel.

4.Move gas valve switch to OFF.

5.Replace the upper access panel.

Failure To Operate

If the unit fails to operate, check the following:

1.Is the thermostat calling for heat?

2.Are access panels securely in place?

3.Is the main disconnect switch closed?

4.Is there a blown fuse or tripped breaker?

5.Is the filter dirty or plugged? Dirty or plugged filters will cause the limit control to shut the unit off.

6.Is gas turned on at the meter?

7.Is the manual main shut–off valve open?

8.Is the internal manual shut–off valve open?

9.Is the unit ignition system in lockout? If the unit locks out again, inspect the unit for blockages.

Heating Sequence Of Operation

1.When thermostat calls for heat, combustion air inducer starts.

2.Combustion air pressure switch proves blower operation. Switch is factory set and requires no adjustment.

3.After a 15 second prepurge, the hot surface ignitor energizes.

4.After a 20 second ignitor warm-up period, the gas valve solenoid opens.

5.Gas is ignited, flame sensor proves the flame, and the combustion process continues.

6.If flame is not detected after first ignition trial, the ignition control will repeat steps 3 and 4 four more times before locking out the gas valve. The ignition control will then automatically repeat steps 1 through 6 after 60 minutes. To interrupt the 60 minute period, move thermostat from “Heat” to “OFF” then back to “Heat”. Heating sequence then restarts at step 1.

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Contents Table of Contents A95UH, A93UH, 95G1UH & 92G1UHA95UH, A93UH, 95G1UH & 92G1UH Unit Dimensions inches mm Front View Side ViewExpanded View Shipping and Packing List Safety InformationA95UH, A93UH, 95G1UH &92G1UH Gas Furnace Building CodesUse of Furnace as a Construction Heater Installed LocationsInstalled in Combination with a Cooling Coil Product Contains Fiberglass Wool Combustion, Dilution & Ventilation AirAir from Inside Unconfined SpaceConfined Space Equipment in Confined Space All Air From InsideAir from Outside Shipping Bolt Removal InstallationSetting Equipment Upflow ApplicationsSide Return Air With transition and filter Installation ClearancesReturn Air Guidlines Horizontal Applications Optional Return Air Base Upflow Applications OnlyRemoving the Bottom Panel Horizontal Application Installation Clearances Suspended Installation of Horizontal UnitFilters Pipe & Fittings SpecificationsReturn Air -- Horizontal Applications Duct SystemPiping and Fittings Specifications Canadian Applications OnlyJoint Cementing Procedure Outdoor Termination Kits UsageExhaust Piping Figures 22 Minimum Vent Pipe Lengths Exhaust PipeHorizontal Application Maximum Allowable Vent Length Right Hand Discharge Shown Intake Piping Figures 24 through Typical AIR Intake Pipe Connections For Canadian Installations Only General Guidelines for Vent TerminationsFor NON-DIRECT Vent INSTALLATiONS in the USA and Canada Vent Termination ClearancesFor Direct Vent INSTALLATiONS in the USA and Canada 15F75 or 44J41 Field Supplied Wall TerminationDirect Vent Concentric Rooftop Termination Direct Vent Application Using Existing Chimney NON-DIRECT Vent Field Supplied Wall Termination NON-DIRECT Vent Application Using Existing ChimneyNON-DIRECT Vent Roof Termination KIT Condensate PipingCondensate Trap and Plug Locations Unit shown in upflow positionCondensate Trap Locations Unit shown in upflow position with remote trapFire or Explosion Hazard Gas PipingLeak Check Horizontal Applications Possible Gas Piping Configurations Carbon Monoxide Poisoning Hazard Accessory Terminals Precautions and ProceduresInterior MAKE-UP BOX Installation ElectricalIndoor Blower Speeds Typical Field Wiring DiagramFurnace & Condensing Unit Thermostat Designations Generator Use Voltage RequirementsTypical Wiring Diagram Placing the furnace into operation Integrated ControlAutomatic Hot Surface Ignition System Unit Start-Up GAS Valve Shown in on Position Manifold Pressure Measurement Gas Pressure AdjustmentSupply Pressure Measurement High Altitude InformationCarbon Monoxide Poisoning Hazard Heat FAN-OFF Time Seconds Electrical SHOCK, Fire Or Explosion Hazard Cleaning the Burner Assembly Planned Service Failure CodesControl Panel Parts Repair Parts ListCabinet Parts Heating Parts Blower PartsUnit SET UP Unit Operation BELOW. Keep Clear of ALL Obstructions Manufacturer Requirements

92G1UH, 95G1UH, A95UH, A93UH specifications

Allied Air Enterprises is renowned for producing high-quality HVAC systems, and its models A93UH, 92G1UH, A95UH, and 95G1UH are no exception. These units exemplify cutting-edge technology, efficiency, and reliability, making them popular choices for residential and commercial applications.

The A93UH model is a high-efficiency gas furnace designed with advanced features that maximize performance while maintaining low operating costs. It boasts a 93% Annual Fuel Utilization Efficiency (AFUE) rating, which ensures that a significant portion of the fuel consumed translates into heat. The A93UH incorporates variable-speed blower technology, allowing for precise airflow adjustments that enhance comfort and energy savings.

Similarly, the 92G1UH is built to provide exceptional heating capabilities. With a robust construction and innovative design, this model also achieves a 92% AFUE rating. It features a durable heat exchanger and a reliable ignition system that ensures consistent performance. The 92G1UH is engineered for quiet operation, minimizing noise levels and contributing to a more comfortable indoor environment.

Moving on to the A95UH, this unit represents the pinnacle of efficiency with its impressive 95% AFUE rating. This model not only emphasizes energy savings but also focuses on long-term durability. Equipped with a two-stage gas valve, the A95UH allows for flexible heating based on demand, which translates into enhanced comfort and efficiency. Additionally, the integrated SmartComfort technology provides homeowners with user-friendly control options.

The 95G1UH model shares many of the same advanced features as the A95UH but is tailored for different installation scenarios. With a comparable efficiency rating, the 95G1UH emphasizes ease of maintenance and installation. Its compact design and lightweight construction make it an ideal choice for various settings where space is limited.

All four models incorporate the latest in comfort control technology, allowing for seamless connectivity and programmability. Homeowners can utilize smart thermostats to optimize their heating schedules, further enhancing energy savings. The featured robust warranty and service support from Allied Air Enterprises provide peace of mind, ensuring that these units will deliver reliable performance for years to come.

Overall, the A93UH, 92G1UH, A95UH, and 95G1UH models stand out in the HVAC market due to their efficiency, innovative features, and durability. These units cater to a variety of heating needs while keeping operational costs low, making them wise investments for any property owner.
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