Bosch Appliances WR430-3K manual Pilot Sparks Continuously with No Water Running, Water is TOO HOT

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PILOT SPARKS CONTINUOUSLY WITH

NO WATER RUNNING

1. Microswitch needs adjustment

If no water is running, but pilot electrode continuously sparks, the microswitch screw to the water valve needs adjustment. See Figure 16.

PILOT LIGHTS BUT BURNERS

WILL NOT COME ON

1.Confirm water valve assembly is working properly.

2.Confirm the flame sensor is in its proper position.

3.Confirm the burner electrovalve switch is functioning properly. Contact your service person or call:

Canada 1-800-663-8405, U.S.A. 1.800-824-7337.

4.The electrical Control Box (Fig. 16) may need to be replaced. Contact your service person or call:

Canada 1-800-663-8405, U.S.A. 1.800-824-7337.

E864_020

Fig. 16 - Electrical wiring diagram

MAIN BURNERS GO OUT DURING HOT

WATER USE

1.Flow rate diminished below activation rate: 0.5 USGM (2.5 l) in hot position, 1.0 USGM (5 l) in warm position

2.Unbalanced pressure in the water lines

The added restriction caused by the Bosch in the hot water system can result in uneven pressures between the cold and the hot. In such cases when mixing cold water at the tap, the lower hot water pressure may be overpowered by a much higher cold water pressure, which may cause the Bosch burners to shut down. Make sure faucet aerators and showerheads are free of minerals and dirt. Do not add any flow restrictor to the shower head.

3.Check gas supply

4.ECO (overheat sensor) tripped due to overheating

5.Minimum inlet pressure on well is inadequate

Check the inlet water pressure. On a private well, raise the minimum pressure setting to 40 psi for best performance. Confirm that the pressure tank is not water logged.

6.Check Blower Fan. Is it operating when burner comes on?

7.Check flapper in outside vent termination for free

movement.

WATER IS TOO HOT

1.Check for lime build-up. (See mineral scale p. 15)

2.Temperature Selection too high

Turn the temperature adjustment knob counter-clockwise (to the left) to lower the maximum water temperature. Note: This will increase the activation flow rate.

3.Inlet water temperature is too hot (as with preheated water.)

4.Insufficient water pressure

WATER IS NOT HOT ENOUGH

1. Temperature selection too low.

Change the setting. Turn the temperature adjustment knob clockwise (to the right).

Note: This will decrease the activation flow rate.

2.Water flow through the heater is higher than the capacity of the Bosch to heat it.

This can be due to too high water inlet pressure (60 psi max. for best results) or due to acid water erosion of venturi. Check venturi (Part #39, Fig. 19 page 20).

3.Btu input is too low due to insufficient gas pressure. It is extremely important for a tankless instantaneous water heater to have the right size gas line to obtain the correct gas pressure.

See specifications on page 14, table 1. Unlike storage tank water heaters, the burners of a tankless water heater must be very powerful to heat water instantaneously since they do this only at the time hot water is actually being used. It is therefore imperative that the gas pressure requirement be met exactly. Insufficient gas pressure will directly affect the water temperature at the time of usage. See page 14 for correct gas pressure settings and fig. 11 for locations where gas pressures are taken.

4.Btu input is too low due to insufficient gas supply. Make sure your main gas line is fully opened. If using LP gas, be sure that the size of the propane tank is adequate to supply the required gas pressure.

5.Cold water is mixing with the hot water between the Bosch and the outlet.

Compare water temperature at outlet of the Bosch (hold the Bosch’s outlet pipe with your hand) and at the tap. If these two are very different, check for mixing valve or plumbing crossover (see “NO SPARK AT THE PILOT” paragraph #4). Where automatic “anti-scald” valves are required by code, lower the temperature setting on the Bosch as much as possible and balance the pressure between cold and hot water after the Bosch.

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Contents Instantaneous gas water heater What to do if YOU Smell GASFeatures Unpacking the Bosch WR430-3K HeaterNAT. GAS Propane Dimensions Reduced 4% for each 1,000 feet above sea level. SeeLocation ElectricalAIR Requirements Clearance MountingGeneral Venting Information IntroductionGeneral Information Sizing & DistancesGeneral Code Requirements Approved Venting MaterialsVent Terminal Installation 90 el Ft straight Ft straight 4.6m 0.3mVent Installation Electrical WiringOperation and Checking the Draft Positive pressureMaintenance Drip Tray Water ConnectionsRelief Valve GAS ConnectionsLighting and Operating Instructions Service HintFilling To Turn OFF GAS to ApplianceTemperature Regulation High Temperature Limit SwitchPressure Regulation Trouble Shooting Maintenance and ServiceAdjusting Screw No Spark AT the PilotStops sparking Main Burners GO OUT During HOT Water USE Pilot Sparks Continuously with No Water RunningPilot Lights but Burners Will not Come on Water is TOO HOTHOT Water Temperature Fluctuates See onInterior Components Diagram Parts List WR430 Interior Components Diagram and Parts List Page Page Page Chauffe-eau instantané, à gaz Www astravan.comDéballage DU CHAUFFE-EAU Bosch WR430-3K Principe de fonctionnementMax Dimensions VoirLieu Dinstallation Alimentation ÉlectriqueDemande Dair Avertissement Dégagements DE SéparationMontage Introduction Information GénéraleLatmosphère Matériaux Approuvés Pour LE Circuit DE Décharge Prescriptions Générales DES CodesInstallation DE LA Bouche DE Décharge Installation DU Système DE Décharge Câblage ÉlectriqueUtilisation ET Contrôle DU Tirage Contrôle DU TirageEntretien Points dinspectionPlateau DE Récupération Raccordement AUX Canalisations DeauVanne manométrique et raccords S vue de dessus Soupape DE Surpression Raccordement À LA Canalisation DE GAZRemplissage Allumage ET UtilisationInterruption DE L’ALIMENTATION EN GAZ DU CHAUFFE-EAU Régulation DE LA Pression Thermostat DE Sécurité «HAUTE TEMPÉRATURE»Dépannage Ne pourra s’allumerPAS D’ÉTINCELLES Pour LA Flamme DE Veille Présence d’air dans la canalisation de gazEAU Trop Chaude Production Constante D’ÉTINCELLES, Sans Circulation D’EAUFlamme DE Veille ALLUMÉE, Mais LE Brûleur NE ’ALLUME PAS Température DE L’EAU InsuffisanteVoir a, Fluctuation DE LA Température DE L’EAUPression de gaz insuffisante Voir les spécifications à la Voir le tableau 1,Composants Internes DU CHAUFFE-EAU WR ET Liste DES Pièces 702 000703 406 Composants Internes ET Liste DES Pièces Page

WR430-3K specifications

The Bosch Appliances WR430-3K is a high-performance wall oven that exemplifies modern design and cutting-edge technology. Engineered with precision, this appliance is crafted to enhance your cooking experience while seamlessly blending into any kitchen aesthetic.

One of the most notable features of the WR430-3K is its advanced European design that creates a sleek and sophisticated look, making it an attractive addition to any home. The stainless-steel finish not only provides a professional appearance but is also resistant to fingerprints, ensuring that the oven maintains its pristine look over time.

Equipped with Bosch's innovative oven technology, the WR430-3K boasts a convection cooking system that circulates heat evenly throughout the oven cavity. This ensures that every dish cooks uniformly, eliminating hot spots and allowing for perfectly baked goods and evenly roasted meats. The appliance also includes multiple cooking modes such as Bake, Broil, and Roast, providing versatility for a wide range of culinary tasks.

In addition to its cooking prowess, the WR430-3K features Bosch's EcoClean technology which simplifies the cleaning process. The oven interior is coated with a special catalytic material that absorbs grease and reduces the need for harsh cleaning chemicals. This commitment to easy maintenance not only saves time but also contributes to a more environmentally friendly kitchen.

Safety is a priority, and the WR430-3K is equipped with an automatic shut-off feature that provides peace of mind, ensuring that the oven will turn off after a designated period of inactivity. Furthermore, the oven’s control panel is intuitively designed, allowing for effortless navigation through various settings, making it user-friendly for even the least experienced cooks.

The Bosch Appliances WR430-3K also comes with a spacious oven capacity, accommodating large meals and multiple dishes at once. The oven's adjustable racks and several shelf positions allow for flexible cooking arrangements to fit any recipe.

In summary, the Bosch Appliances WR430-3K wall oven combines elegance with functionality. Its impressive features, innovative technologies, and thoughtful design make it an essential appliance for aspiring chefs and home cooks alike, ensuring delicious outcomes for every meal. Whether you are baking, roasting, or broiling, this wall oven is sure to enhance your culinary creations while effortlessly complementing your kitchen decor.