This well engineered, gas water heater has been specially designed to operate with incoming pre-heated water: It operates on the principle of heating water instantaneously “on demand”. When a hot water faucet is opened, cold water flows through the coils of the heat exchanger in the Aquastar. This same flow opens the gas valve, and the burners are ignited by the pilot flame. The heat exchanger coils absorb the heat generated by the burners and transfer heat to the water. When the hot water faucet is shut off, the gas valve automatically closes and the burners turn off. Your hot water faucet is an ignition key to turn on the water heater, giving you control over your hot water energy use. Each time you turn off your hot water faucet, you also shut off the water heater. On the Aquastar “S” model, if the incoming water is colder than the thermostat setting of the heater, the burners will ignite to heat the water in order to boost it and maintain it at the temperature setting. If the incoming water has been pre-heated, (ie) solar, and this water temperature is warm then the the burners will modulate down accordingly, or shut down completely if the temperature is as hot or hotter than the heater thermostat setting. The Aquastar 125 BS is the perfect backup to a solar hot water system.

FEATURES

-High Quality Materials for Long Working Life.

-Copper heating coils for endless supply of hot water.

-Burner output proportional to hot water flow demand for maximum energy efficiency.

-Automatic Thermostatic Control for steady hot water temperature

-Input BTU’s modulate to zero to prevent overheating of water from pre-heat source

-Safety thermocouple at pilot burner.

-Automatic overheating protection shut-off sensor.

-Stainless steel burners with stabilized blue flame.

-Built-in corrosion resistant draft inducer.

-Compact space saver: mounts on a wall with two hooks.

-Easily removable one-piece cover.

-Easy one person installation.

-Adjustable water flow restrictor to ensure that water flow demand will not exceed the heating capacity of the heater.

-Easy pilot flame lighting with push button piezo ignition.

BOSCH is constantly improving our products, therefore specifications are subject to change without prior notice.

AquaStar 125B LPS and 125B NGS Specifications

Gas Input max.: 117,000 Btu/hr min.: 23,400 Btu/hr

Water Connection 1/2” Thread fitting NPT

H x W x D 29 3/4” x 18 1/4” x 8 3/4"

Vent 5”

Gas Connection 1/2” NPT thread

Min. Water Pressure 18 Psi at 4 GPM

Max. Water Pressure 150 Psi

Shipping Weight 44 LB

Net Weight 42 LB

1.8GPM at 90° rise

3.7GPM at 45° rise

Min. Water Flow 1/2 gal/min

LP GAS Supply Pressure

(before Aquastar regulator) min.: 11” W.C. max.: 14” W.C.*

Required LP GAS Pressure at inlet

tap while Aquastar is operating: 10.5” W.C.

LP GAS Burner Manifold pressure while Aquastar is operating at maximum input: 9.0” W.C.

Natural Gas Supply Pressure

 

(before Aquastar regulator)

min.: 7” W.C.

 

max.: 14” W.C.*

Required Natural Gas Pressure at inlet tap

while Aquastar is operating:

5.7” W.C.

Natural Gas Burner Manifold pressure while Aquastar is

operating at maximum input:

4.2” W.C.

*Inlet gas pressure before Aquastar regulator must not exceed this value. Pressure may need to be adjusted for high altitudes, see page 11.

UNPACKING THE AQUASTAR HEATER

This heater is packed securely. The box includes two water connection fittings, a gas pressure regulator, a pressure relief valve, an incandescent particle tray, two hooks for hanging the heater, this manual, a warranty statement and a warranty registration card. Do not lose this manual, as there is a charge for replacement. Please complete and return the enclosed warranty registration card.

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Bosch Appliances 125B NGS, 125B LPS Features, Unpacking the Aquastar Heater, Required Natural Gas Pressure at inlet tap

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.