Bosch Appliances 125B LP, 125B NG specifications Combustion AIR Requirements, Clearances

Page 5

Fig. 1 - Water heater drain plug

WARNING: Flammable materials, gasoline, pressurized containers, or any other items or articles that are potentially fire hazards must NOT be placed on or adjacent to the heater. The appliance area must be kept free of all combustible materials, gasoline and other flammable vapors and liquids.

COMBUSTION AIR REQUIREMENTS

The AquaStar 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 down through the unit’s vent pipe is capable of freezing these components. This Installation Manual specifies the minimum vertical vent pipe 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 can rob the make- up air in the AquaStar’s vent pipe, leaving the cold infiltrating air capable of freezing the cold water in the AquaStar heat exchanger. More make up air is the solution. Follow the instructions on venting and checking adequacy of make up air. A HVAC specialist should be used to design solutions for providing more make-up air if necessary.

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 5850 cubic feet for the AquaStar 125B 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.

Air Vents

(10 ¾ X 10 ¾ in. each)

 

125B

 

125B Air Vents

(5 ½ X 5 ½ in. each)

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, increase the sizes of your openings by 75% if your louvers are wood and by 30% if your louvers are metal. Refer to the National Fuel Gas Code for complete information. In buildings of tight construction all air should be taken from outside.

CLEARANCES

The Aquastar 125 B 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 (306 mm)

B.Front 4 inches (102 mm)

C.Back 0 inches

D.Sides 4 inches (102mm)

E.Bottom 12 inches (306 mm)

Clearance from vent is dependent upon the clearance rating of the venting material used. For example: type B-1 vent is approved for 1 inch clearance.

6 720 607 030

5

Page 4 Page 6
Image 5
Page 4 Page 6
Contents What to do if YOU Smell GAS For Your SafetyTable of Contents Unpacking the Aquastar Heater FeaturesFront View Side View Aquastar Model 125BGeneral Rules to Follow For Safe Operation Proper Location for Installing Your HeaterClearances Combustion AIR RequirementsMounting the Heater Mounting InstallationEstablish a ONE Foot Rise Before ANY Elbows VentingFigure C Masonry Chimneys6 Adaptor Used on High Altitude Vent Adaptor for High Altitude InstallationsGAS Line Sizing Maximum Inlet GAS Flow Pressure SettingGAS Connections For LP GAS GAS Line Sizing For Natural GASOperating Instructions For Your Safety Read Before Lighting the PilotWater Connections To Turn OFF GAS to Appliance Setting the Water TemperatureAIR Screen Pilot Orifice Pilot Light will not Light Pilot Lights but Flame Goes OUT When Button is ReleasedBurners do Notignite When HOT Water is Turned on Water is not HOT Enough Water is TOO HOTUnbalanced pressure in waterlines HOT Water Temperature Fluctuates / Unit Deactivated720 607 Diagram of AquaStar 125 B Interior Components Diagram and Parts List Interior Components Diagram Parts List 125B Limited Warranty Flow chart of Aquastar 125 B Maintenance Table see pages 13

125B NG, 125B LP specifications

Bosch Appliances has long been a trusted name in kitchen technology, and their 125B LP and 125B NG models are no exception. These gas appliances combine advanced features with top-notch engineering, ensuring excellent performance and reliability in the kitchen. Designed for both professionals and home cooks, the 125B series caters to diverse culinary needs.

One of the main features of the Bosch 125B model is its dual fuel capability. The LP (liquefied petroleum) and NG (natural gas) options make it flexible for various installations and preferences. This versatility ensures that users can easily find the right setup for their kitchens, whether they're using propane or natural gas.

The burners in the 125B series are designed with precision in mind. Each model features high-efficiency burners that deliver a maximum output of 15,000 BTUs. This level of power enables rapid heating for boiling, frying, or searing, while the low-simmer setting allows for gentle cooking tasks such as sauces and delicate soups. The continuous cast iron grates offer both durability and stability, allowing for easy movement of pots and pans across the cooking surface.

An additional technological highlight of the Bosch 125B series is the flame failure safety device. This essential safety feature automatically cuts off the gas supply if the flame goes out, providing peace of mind for users. The inclusion of electronic ignition also enhances convenience, making it easy to start the burners with just a turn of the knob.

The sleek design of the Bosch 125B appliances blends seamlessly into any kitchen decor. With a professional stainless steel finish, they add an element of sophistication while being easy to clean and maintain. The intuitive control knobs are ergonomically designed, ensuring smooth and precise adjustments to the flame.

In terms of installation, both the 125B LP and NG models are designed for straightforward setup, making them suitable for renovation projects or new builds. Bosch Appliances also offers a range of accessories to further enhance the functionality and aesthetic of the kitchen setup.

Overall, the Bosch 125B LP and 125B NG appliances represent a perfect combination of efficiency, safety, and style. With their robust features and advanced technology, they promise to elevate the cooking experience for anyone who values quality and performance in the kitchen. Whether you're a novice home cook or a seasoned chef, these models are sure to meet and exceed your culinary expectations.
Top Page Image Contents