Bosch Appliances 125B NGS, 125B LPS HOT Water Temperature Fluctuates / Unit Deactivated

Page 16

See specifications on page 2. 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 2 for correct gas pressure settings.

3.Thermostat calibration is incorrect or thermostat is defective.

Contact your service person or call CEC.

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 AquaStar and the outlet

Compare water temperature at outlet of the AquaStar (hold the AquaStar’s outlet pipe with your hand) and at the tap. If these two are very different, check for mixing valve or plumbing crossover (see “MAIN BURNERS WILL NOT IGNITE...” paragraph #6).

6. Parts in water valve are dirty or damaged, which will prevent the gas valve from being fully opened.

Water valve maintenance needs to be performed, see #7 under BURNERS DO NOT IGNITE WHEN HOT WATER IS TURNED ON.

HOT WATER TEMPERATURE FLUCTUATES / UNIT DEACTIVATED

1. Unbalanced pressure in waterlines

The added restriction caused by the Aquastar 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 Aquastar burners to shut down (deactivate). Make sure faucet aerators or shower heads are free of minerals.

Do not add any flow restrictor to the shower head. Typically this deactivation symptom is a result of the hot water being too hot to use comfortably. Warm inlet water generally causes this. Lowering the control knob setting and/or reducing the inlet gas supply to the heater should correct this deactivation symptom.

2.Inlet water pressure is erratic due to inadequate supply water pressure or saturated pressure tank on well system

For installation on a private well system with the use of a pressure tank, the lowest pressure range setting recommended is 30-50 psi (2.07-3.45 bar). Confirm that the pressure tank is not water logged.

3.Cold water is mixing with the hot water between the AquaStar and the outlet

See #6 under “MAIN BURNERS DO NOT IGNITE WHEN HOT WATER TURNED ON”.

4 . Insufficient gas pressure

Note required gas pressures (page 2) and consult gas service person.

16

6 720 606 518

Page 15 Page 17
Image 16
Page 15 Page 17
Contents For Your Safety Table of ContentsUnpacking the Aquastar Heater FeaturesRequired Natural Gas Pressure at inlet tap Model 125BS Front View Side ViewTOP a Front B Back Sides Floor C Vent Diameter Proper Location for Installing Your Heater General Rules to Follow For Safe OperationCombustion AIR Requirements ClearancesMounting Installation Aquastar 125 B S is design certified for mounting on a wallVenting Figure aMasonry Chimneys Figure C 720 606Vent Adaptor for High Altitude Installations 6 Adaptor Used on High AltitudeGAS Line Sizing For Natural GAS For LP GASMaximum Inlet GAS Flow Pressure Setting GAS Line SizingWater Connections Above 4.500 ft consult your local gas supplierFor Your Safety Read Before Lighting the Pilot Operating InstructionsWhat to do if YOU Smell GAS To Turn OFF GAS to ApplianceMaintenance and Service Pilot burner with air screen/ pilot orificePilot Lights but Flame Goes OUT When Button is Released Pilot Light will not LightBurners do not Ignite When HOT Water is Turned on Gas pressure too lowWater is TOO HOT Water is not HOT EnoughHOT Water Temperature Fluctuates / Unit Deactivated Unbalanced pressure in waterlinesDiagram of AquaStar 125 BS Interior Components Diagram and Parts List Interior Components Diagram Parts List 125BS Flow chart of Aquastar 125 BS Limited Warranty GeneralMaintenance Table see

125B NGS, 125B LPS specifications

Bosch Appliances has long been a revered name in the home appliance industry, recognized for its commitment to quality, innovation, and energy efficiency. Among its impressive lineup, the Bosch 125B NGS and the Bosch 125B LPS stand out for their advanced features and technologies that enhance the cooking experience in modern kitchens.

The Bosch 125B NGS is a gas cooktop designed for those who appreciate the precision of gas cooking. With its sleek stainless-steel design and intuitive controls, this appliance adds a touch of elegance to any kitchen. One of its main features is the rapid heating capability, thanks to the powerful burners that provide quick and even heat distribution. The cooktop includes multiple burner sizes, allowing users to choose the right heat level for various types of cooking, from simmering sauce to boiling pasta.

Additionally, the Bosch 125B NGS is equipped with an automatic re-ignition system, enhancing safety by ensuring that burners reignite if they go out. This feature is particularly beneficial in busy kitchen settings where distractions can occur. The continuous grate design allows for easy movement of pots and pans across the cooking surface, making multi-tasking a breeze.

On the other hand, the Bosch 125B LPS offers an electric alternative with a more modern flair. This built-in induction cooktop harnesses the power of induction technology, which uses magnetic fields to directly heat pots and pans. One of the key characteristics of this model is its exceptional energy efficiency, as it only heats the cookware, resulting in less wasted energy and cooler cooking surfaces. The Bosch 125B LPS features a touch control panel that allows for precise temperature adjustments at the touch of a finger.

Moreover, the model includes safety features such as a child lock and automatic shut-off, ensuring peace of mind for families. The sleek and minimalist design of the Bosch 125B LPS makes it a favorite among those who value aesthetics as much as functionality.

Both the Bosch 125B NGS and 125B LPS reflect the brand’s dedication to high-quality craftsmanship, innovative technology, and user-friendly operation, making them exemplary choices for anyone looking to elevate their culinary experience. Whether you prefer the hands-on approach of gas cooking or the quick precision of induction, Bosch offers reliable and versatile solutions to meet your kitchen needs.
Top Page Image Contents