American Dryer Corp GWH 425 EF manual Combustion AIR Requirements, Clearances

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COMBUSTION AIR REQUIREMENTS

The 425 EF water heater holds cold water in its copper heat exchanger and brass water valve when not in use. Because of this, any cold air that comes in through the unit’s vent pipe is capable of freezing these components. This Installation Manual specifies the vent length requirements and the amount of combustion air required for this unit. When all requirements are followed, the unit will operate properly and safely. However, there may still be a risk of freezing due to negative draft if all the combustion appliances in the area are not being supplied with a sufficient amount of make-up air. A wood stove or furnace may pull combustible air through the 425 EF vent pipe, leaving the cold infiltrating air capable of freezing the cold water in the 425 EF heat exchanger. To prevent this the FXHOOD horizontal vent terminator, which is supplied separately with the water heater, needs to be installed on the end of the horizontal vent run (see page 9). The FXHOOD is a CSA approved vent terminator for the 425 EF and has a built in back draft flapper.

Observe the following instructions concerning combustion air.

Appliances located in unconfined spaces:

a)An unconfined space is one whose volume is greater than 50 cubic feet per 1000 Btu per hour of the combined rating of all appliances installed in the space. That would be 6500 cubic feet for the 425 EF alone.

b)In unconfined spaces in buildings of conventional frame, masonry, or metal construction, infiltration is normally adequate to provide air for combustion, ventilation, and dilution of flue gasses.

Appliances located in confined spaces: The confined space must be provided with two permanent openings, one commencing within 12 inches of the top and one commencing within 12 inches of the bottom of the enclosure. Each opening must have a minimum free area of one square inch per:

—1000 Btu/hr if all air is taken from inside the building.

—2000 Btu/hr if all air is taken from the outside by horizontal ducts.

—4000 Btu/hr if all air is taken from the outside by direct openings or vertical ducts.

Or the confined space must be provided with one permanent opening or duct that is within 12 inches of the ceiling of the enclosure. This opening must have a minimum free area of one square inch per:

—3000 Btu/hr if all air is taken from the outside by a direct opening or vertical duct.

Louvers, grills and screens have a blocking effect. If the effective free area is not known, assume it is 20 % to 25% of the total opening for wood louvers and 60 % to 75% for metal louvers. Refer to the National Fuel Gas Code for complete information. In buildings of tight construction all air should be taken from outside.

This product is not approved for manufactured homes (mobile home), recreational vehicles (RV) or boats. Reference ANSI Z21.10.3.

This product is neither designed or approved for outside installations.

CLEARANCES

The 425 EF is design certified for installation on a combustible wall and for installation in an alcove or closet with the minimum clearances to combustible and non - combustible construction listed below

A.Top 12 inches (305 mm)

B.Front 4 inches (102 mm)

C.Back 0 inches*

D.Sides 4 inch (102mm)

E.Bottom 12 inches (305 mm)

Air Vents

(10 ¾ X 10 ¾ in. each)

 

425 EF

 

*On a combustible wall surface the unit should be mounted away from the wall to provide adequate clearance of the vent pipe. Clearance from the vent pipe is dependent upon the clearance rating of the venting material used. See VENTING section.

425 EF Air Vents

(5 ½ X 5 ½ in. each)

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Contents GWH 425 EF For Your Safety Table of ContentsWhat to do if YOU Smell GAS Features Unpacking the 425 EF HeaterFront View Side View TOP a Front B Back Sides Floor C Vent DiameterProper Location for Installing Your Heater General Rules to Follow For Safe OperationCombustion AIR Requirements ClearancesMounting Installation Incandescent Particle Tray IllustrationVenting InchHorizontal Side Wall Soffit GAS Connections GAS Line SizingGAS PIPING, Connections GAS Line Sizing For Natural GASFor LP GAS Water valve and water connectors, top view Water ConnectionsFlue gas safety device Electrical ConnectionsFor Your Safety Read Before Operating Your HOT Water Heater Lighting and Operating InstructionsTemperature Adjustment Knob Microswitch adjustment No Spark AT the PilotPilot Sparks Continuously with no Water Running FAN Circulates When HOT Water is Shut OFF 720 607 Diagram of 425 EF Interior Components Diagram and Parts List Interior Components Diagram Parts List 425 EF Flow chart of 425 EF Fifteen Year Limited Warranty Maintenance Table see Controlled Energy Corp

GWH 425 EF specifications

American Dryer Corp GWH 425 EF is a highly efficient, energy-saving dryer designed specifically for commercial laundry applications. With its robust construction and innovative technologies, the GWH 425 EF delivers exceptional performance while maximizing operational efficiency.

One of the main features of the GWH 425 EF is its optimized drying capacity. With a 45-pound load capacity, this dryer efficiently processes large volumes of laundry, making it an ideal choice for laundromats, hotels, and other commercial establishments. The dryer is designed to handle varied fabric types, providing versatile solutions for all drying needs.

The GWH 425 EF incorporates advanced heating technologies that enhance drying speed and efficiency. Its energy-efficient gas heating system not only reduces operation costs but also minimizes environmental impact. The dryer offers a range of adjustable temperature settings, enabling operators to customize drying cycles for different fabric types and load sizes. This flexibility enhances fabric care and improves overall drying performance.

Another standout characteristic of the GWH 425 EF is its user-friendly control panel. Equipped with a digital display, the control panel allows for easy programming and monitoring of drying cycles. Operators can select from multiple drying options, and the machine's intuitive interface makes it simple to adjust settings quickly. This convenience translates to improved workflow and increased productivity in busy commercial environments.

Safety is a top priority for American Dryer Corp, and the GWH 425 EF is equipped with multiple safety features. These include a built-in lint screen that traps lint and debris, reducing the risk of fires. Additionally, the dryer is engineered with a robust structural design, ensuring durability and longevity even under constant use.

The GWH 425 EF is also designed with maintenance in mind. It features easy access to internal components for routine servicing, allowing operators to keep the dryer in peak operating condition with minimal effort. This eases maintenance burdens and prolongs the lifespan of the machine.

Finally, the GWH 425 EF is backed by American Dryer Corp's commitment to quality and customer satisfaction. With a reputation for producing reliable and efficient laundry equipment, American Dryer Corp ensures that the GWH 425 EF meets the demanding needs of commercial laundry services. Overall, the American Dryer Corp GWH 425 EF is an excellent investment for businesses looking to optimize their laundry operations while maintaining quality and efficiency.
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