Allied Air Enterprises A95DF, 92G1DF, A93DF Gas Piping, Leak Check, Fire or Explosion Hazard

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Gas Piping

CAUTION

If a flexible gas connector is required or allowed by the authority that thas jurisdiction, black iron pipe shall be installed at the gas valve and extend outside the furnace cabinet. The flexible connector can then be added between the black iron pipe and the gas supply line.

WARNING

Do Not exceed 600 in. lbs. (50 ft. lbs.) torque when attaching the gas piping to the gas valve.

1.Gas piping may be routed into the unit through either the left or right hand side. Supply piping enters into the gas valve from the side of the valve as shown in Figure 43. Move bellows grommet to side of the cabinet which the gas line enters. Ensure opposite gas line entrance is plugged with supplied plug.

IMPORTANT

A low inlet pressure switch in LP/propane applications is recommended.

2.When connecting gas supply, factors such as length of run, number of fittings and furnace rating must be considered to avoid excessive pressure drop. Table 10 lists recommended pipe sizes for typical applications.

NOTE: Use two wrenches when connecting gas piping to avoid transferring torque to the manifold.

3.Gas piping must not run in or through air ducts, clothes chutes, chimneys or gas vents, dumb waiters or elevator shafts. Center gas line through piping hole. Gas line should not touch side of unit. See Figures 43.

4.Piping should be sloped 1/4 inch per 15 feet (6 mm per 5.6 m) upward toward the gas meter from the furnace. The piping must be supported at proper intervals, every 8 to 10 feet (2.44 to 3.05 m), using suitable hangers or straps. Install a drip leg in vertical pipe runs to serve as a trap for sediment or condensate.

5.A 1/8" N.P.T. plugged tap or pressure post is located on the gas valve to facilitate test gauge connection. See Figure 50.

6.In some localities, codes may require installation of a manual main shut off valve and union (furnished by installer) external to the unit. Union must be of the ground joint type.

IMPORTANT

Compounds used on threaded joints of gas piping must be resistant to the actions of liquified petroleum gases.

Leak Check

After gas piping is completed, carefully check all piping connections (factory and field installed) for gas leaks. Use a leak detecting solution or other preferred means.

The furnace must be isolated from the gas supply system by closing its individual manual shut off valve during any pressure testing of the gas supply system at pressures greater than or equal to 1/2 psig (3.48 kPa, 14 inches w.c.).

MANUAL MAIN SHUT−OFF

VALVE WILL NOT HOLDFURNACE

NORMAL TEST PRESSURE

1/8" N.P.T. PLUGGED TAP

ISOLATE

GAS VALVE

CAP

 

FIGURE 42

IMPORTANT

When testing pressure of gas lines, gas valve must be disconnected and isolated. (See Figure 42.) Gas Valves can be damaged if subjected to pressures greater than 1/2 psig (3.48 kPa).

WARNING

FIRE OR EXPLOSION HAZARD

Failure to follow the safety warnings exactly could result in serious injury, death, or property damage. Never use an open flame to test for gas leaks. Check all connections using a commercially available soap solution made specifically for leak detection. Some soaps used for leak detection are corrosive to certain metals. Carefully rinse piping thoroughly after leak test has been completed.

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Issue 1109

506725-01

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Contents Table of Contents A95DF, A93DF, 95G1DF & 92G1DFTOP View Front View Side ViewParts Arrangement Safety Information Gas FurnaceShipping and Packing List Package 1 of 1 contains Building CodesLocations and Clearances Installed in Combination with a Cooling CoilUse of Furnace as Construction Heater Product Contains Fiberglass Wool Combustion, Dilution & Ventilation AirUnconfined Space Confined SpaceAir from Inside Equipment in Confined Space − ALL AIR from InsideAir from Outside Equipment in Confined Space − ALL AIR from OutsideShipping Bolt Removal Installation Setting EquipmentUnits with 1/2 HP Blower Motor Installation on Combustible Flooring Figure Installation on Non-Combustible Flooring FigureNON−COMBUSTIBLE Floor Opening Size Combustible Flooring Base Opening Size Installation on Cooling Coil Cabinet FigureReturn Air Opening Downflow Units Piping and Fittings Specifications Outdoor Termination Kits Usage Canadian Applications OnlyStandard Concentric Venting Practices Piping Suspension Guidelines Joint Cementing ProcedureReplacing Furnace That WAS Part of a Common Vent System Exhaust Piping Figure Minimum Vent Pipe LengthsMIN. Vent Length ModelsA95DF / 95G1DF and A93DF / 92G1DF Typical Exhaust Pipe Connections Typical Intake Pipe Connections Direct Vent ApplicationsFor Canadian Installations Only Intake PipingTypical AIR Intake Pipe Connections General Guidelines for Vent TerminationsInside Corner Detail No minimum to outside corner Direct Vent Roof Termination KIT Exhaust Pipe Termination Size ReductionModel 51mm 76mm Direct Vent Concentric Rooftop Termination Direct Vent Application Using Existing ChimneyDirect Vent Concentric Wall Termination NON−DIRECT Vent Application Using Existing Chimney NON−DIRECT Vent Field Supplied Wall Termination ExtendedNON−DIRECT Vent Roof Termination KIT NON−DIRECT Vent Field Supplied Wall TerminationCondensate Piping Unit with Evaporator CoilTrap / Drain Assembly Using 1/2 PVC or 3/4 PVC Leak Check Gas PipingFire or Explosion Hazard GAS Pipe Capacity − FT 3 /HR kL/HR Removal of the Furnace from Common Vent Carbon Monoxide Poisoning HazardPrecautions and Procedures Accessory TerminalsElectrical Electrostatic Discharge ESDIndoor Blower Speeds Generator Use Voltage RequirementsTypical Wiring Diagram Integrated Control Automatic Hot Surface Ignition SystemUnit Start-Up Placing the furnace into operationPriming Condensate Trap Gas Valve Operation FigureTurning Off Gas to Unit Failure To OperateGAS Meter Clocking Chart Burner Orifice Conversion Kits at Varying Altitudes Carbon Monoxide Poisoning Hazard Flame Rollout Switches Two Pressure SwitchTemperature Rise Primary LimitBlower Data A93DF1D / 92G1DF Blower Data A95DF1D / 95G1DF Electrical SHOCK, Fire Or Explosion Hazard Cleaning the Burner Assembly Planned Service Diagnostic CodesRepair Parts List Cabinet Parts Heating PartsControl Panel Parts Blower PartsGAS Supply Intake / Exhaust PipeDuct System Supply AIR Duct Return DuctUnit Operation Clear of ALL Obstructions Manufacturer Requirements

A95DF, 95G1DF, A93DF, 92G1DF specifications

Allied Air Enterprises offers a range of high-efficiency commercial and residential heating and cooling systems, with models like the 92G1DF, A93DF, 95G1DF, and A95DF gaining popularity for their cutting-edge technology and advanced features. Each of these models stands out in performance, reliability, and energy efficiency, making them excellent choices for diverse applications.

The 92G1DF model features a multi-stage gas valve that enhances temperature regulation, allowing for more precise heating. With an impressive Annual Fuel Utilization Efficiency (AFUE) rating, this furnace efficiently utilizes fuel, resulting in lower energy costs and reduced emissions. Its compact design makes it suitable for installations in tight spaces, while the durable heat exchanger extends the unit’s lifespan.

In contrast, the A93DF is engineered for enhanced comfort and flexibility. This model incorporates a variable-speed blower motor, which adjusts air circulation according to the heating demands in the space. This feature not only maximizes comfort by providing consistent temperatures but also promotes energy savings by reducing unnecessary power consumption. Additionally, the A93DF includes advanced diagnostic capabilities that simplify troubleshooting and maintenance, making it a favorite among HVAC professionals.

The 95G1DF is another noteworthy model that combines versatile performance with exceptional efficiency. This furnace boasts an AFUE rating of up to 95%, making it one of the most efficient models in its class. Its innovative design includes a secondary heat exchanger that captures additional heat from exhaust gases, optimizing energy utilization. Furthermore, the 95G1DF is equipped with an advanced control system that allows homeowners to set specific comfort levels.

Lastly, the A95DF model takes efficiency to a new level. With features such as a modulating gas valve and a variable-speed blower, this unit seamlessly adapts to changing heating needs. The A95DF not only heats a space but also enhances air quality through advanced filtration options. Its whisper-quiet operation adds to user satisfaction, making it ideal for residential settings.

In summary, Allied Air Enterprises' models 92G1DF, A93DF, 95G1DF, and A95DF demonstrate a commitment to innovation and energy efficiency, with features designed to provide superior comfort and reliability. With their advanced technologies and high-performance characteristics, these models are positioned as top contenders in the heating and cooling marketplace, ensuring that customers can enjoy a comfortable environment year-round.
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