American Dryer Corp GWH 425 EF manual No Spark AT the Pilot, Microswitch adjustment

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PILOT ORIFICE

Fig. 13 - Pilot burner with pilot orifice

Main Burner Flames: The main burner flames should be blue, with a more intense blue cone in the center core. Yellow flames could be a sign of wrong size gas orifices or dirty burners, or a blockage on the heat exchangers fins. If some burners have yellow flames while others have good flames, it is likely that dust, lint or spider webs have partially clogged the burner venturis. To clean the burners, contact a gas service person.

Mineral Scale Build-up: 425 EF, when operated at lower temperature settings, do not accumulate mineral buildup. If however, the heater is used at the higher temperature settings and the water has a high mineral content, periodic descaling may be necessary. The heating coils should be flushed with a descaling solution.

Consult your dealer or service person.

TROUBLE SHOOTING (see maintenance table)

Introduction

The 425 EF pilot and burners are ignited by a water flow valve. Numerous water related problems can cause this water valve to malfunction such as: Insufficient water flow volume to activate the burners at its minimum flow requirement; Dirt in the water flow valve causing it to malfunction; Sediment build-up in faucet aerators, or shower heads; Uneven pressures between cold and hot with single lever faucets; Plumbing cross overs. These water flow related problems can cause the heater to deliver less than its full output, or to fail to ignite or to shut down completely.

Problems are stated in upper case, bold face. Most common causes for the problems follow in order of likelihood. The suggested solutions require that the cover be taken off. To do this, pull off the temperature knob and unscrew and remove the temperature knob collar. Pull main cover out toward you and lift up and out.

NO SPARK AT THE PILOT

1. On/Off switch is not ”On” (Position “ ”).

The On/Off switch is located behind the flipdown cover plate on the front panel strip. See fig. 10.

2. Bad electrical connections.

Be certain that all electrical connections are clean, tight, and free of any moisture.

3. Water flow is not sufficient to activate heater.

Water flow rate at faucet is below minimum flow needed to activate heater. When temperature adjustment knob is turned all the way clockwise, the model 425 EF requires 1/2 gallon per minute flow to activate the heater. As a reference, this is a flow which would fill a quart jar in 30 seconds. If the temperature adjustment knob is turned fully counterclockwise, a flow rate of 1.1 gallons/minute is required to activate the heater.

4. Bad fuse

Check the viability of the fuse (see Fig 9 (#9) for location of fuse). Replace if necessary.

5. Water inlet filter is clogged

Water flow is restricted, preventing flow needed to activate heater. Clean water inlet filter screen.

6. Cross over in water lines

To confirm there is no cross-over in the plumbing, shut off the cold water supply to the 425 EF water heater and open a hot water faucet. There should not be any water flowing at that faucet. Water running is a sign of a plumbing cross- over. Consult your plumber.

7. Microswitch needs to be adjusted or replaced.

If you do not hear a click when a tap is opened, the microswitch needs to be adjusted. See Fig. 15 (#11) for location and see Fig. 14 for adjustment. The microswitch may need to be replaced.

 

 

 

Adjusting screw

 

G871 212

 

 

 

 

 

 

Fig. 14 - microswitch adjustment

 

 

 

 

 

 

 

 

Pilot does not spark with

 

Pilot

always

sparks

 

water flow

 

without water flow

1

Close water tap

1

Close water tap

 

2

Remove screw cap and

2

Screw

in

adjusting screw

 

unscrew till sparking starts

 

until it stops sparking

3

Screw in turning one and a

3

Continue

to

screw in

 

half turns

 

turning one and a half

 

 

 

turns more

 

8.Cold incoming water connection made to wrong side of heater

Make sure cold water inlet connection is on the right side when you are facing the 425 EF.

9.Water valve parts may be dirty or components damaged First check that venturi is free of dirt particles. Water valve

and component parts must be totally free of dirt.

6 720 607 017

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Contents GWH 425 EF What to do if YOU Smell GAS For Your SafetyTable of Contents Unpacking the 425 EF Heater FeaturesTOP a Front B Back Sides Floor C Vent Diameter Front View Side ViewGeneral Rules to Follow For Safe Operation Proper Location for Installing Your HeaterClearances Combustion AIR RequirementsIncandescent Particle Tray Illustration Mounting InstallationInch VentingHorizontal Side Wall Soffit GAS Line Sizing GAS ConnectionsFor LP GAS GAS PIPING, ConnectionsGAS Line Sizing For Natural GAS Water Connections Water valve and water connectors, top viewElectrical Connections Flue gas safety deviceLighting and Operating Instructions For Your Safety Read Before Operating Your HOT Water HeaterTemperature Adjustment Knob No Spark AT the Pilot Microswitch adjustmentPilot 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 Controlled Energy Corp Maintenance Table see

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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