Bosch Appliances 125FX NG Electrical Connections, Connecting the pressure relief valve PRV

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-Typical setups are shown below with the pressure relief valve attached. The pressure relief valve is supplied with the heater, and should only be fitted on the hot water outlet as shown. The cold water inlet setup will be identical to diagrams below but without the pressure relief valve.

-For ease of installation the piping setup should be prepared as one whole piece with either threaded or sweated connections. The entire assembly will then mount easily against a wall and to the back of the Aquastar.

THREADEDASSEMBLY SWEATEDASSEMBLY

1/2” FLEX

Connecting the pressure relief valve (PRV)

The listed pressure relief valve supplied with the heater must be installed at the time of installation. Should a discharge line be added to the PRV no valve is to be placed between the PRV and the heater. No reducing coupling or other restriction may be installed in the discharge line. The discharge line must be installed such that it allows complete drainage of both the PRV and the line. The location of the PRV must be readily accessible for servicing or replacement. and be mounted as close to the water heater as possible. To install the PRV, a suitable fitting connected to an extension on a “T” fitting can be sweated to the hot water line. See Fig 9.

1/2” FLEX

PIPE PRV TO APPROPRIATE DISCHARGE

PIPE PRV TO APPROPRIATE DISCHARGE

Pressure

Relief

Valve

Fig. 8 - Plumbing connections for the Aquastar 125FX

ELECTRICAL CONNECTIONS

Fig. 9 - Pressure Relief Valve

WARNING: This heater must be electrically grounded in accordance with the most recent edition of the National Electrical Code, NFPA 70. In Canada, all electrical wiring to the heater should be in accordance with local codes and the Canadian Electrical Code, CSA C22.1 Part 1. Do not rely on the gas or water piping to ground the metal parts of the heater.

CAUTION: Label all wires prior to disconnection when servicing controls. Wiring error can cause improper and dangerous operation. Verify proper operation after servicing.

The AquaStar 125FX requires an electrical power supply from 120VAC 60Hz circuit and must be properly grounded.

-A means for switching off the 120 VAC power supply must be provided.

-The heater is wired as shown in the wiring diagram. (Fig 10).

E864_020

Fig 10: Wiring Diagram for AQ 125FX

1

- microswitch

9

- ionization probe (flame

2

- electric control box

 

 

sensor)

3

- exhaust fan

10

-

pilot electrode

4

- fuse

11

-

pilot electrovalve

5

- circuit interrupter

12

-

Diaphragm switch

6

- electronic control box

13

-

burner electrovalve

7

- temperature limiter

14 - power cord

8

- sensors of exhaust gases

 

 

 

11

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Contents What to do if YOU Smell GAS For Your SafetyTable of Contents Principle of Operation FeaturesUnpacking the Aquastar Heater Aquastar Model 125FX General Rules to Follow For Safe Operation Proper Location for Installing Your HeaterCombustion AIR Requirements Clearances Mounting InstallationFreeze Warning Spill Switch SafetyVenting Some Venting Guide Suggestions Horizontal Side WallSide wall exit locations for mechanical draft vent terminals For LP GAS GAS Line Sizing For Natural GASAbove 4.500 ft consult your local gas provider Maximum Inlet Pressure SettingsWater Connections Altitude Natural Gas Liquid PropaneElectrical Connections Connecting the pressure relief valve PRVWiring Diagram for AQ 125FX Operating Instructions For Your Safety Read Before Operating Your HOT Water HeaterSetting the Water Temperature Lighting and Operating InstructionsTemperature Adjustment Knob No Spark AT the Pilot 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 HOT Diagram of AquaStar 125FX Interior Components Diagram Parts List 125FX Interior Components Diagram and Parts List Controlled Energy Corp Maintenance Table see pages 13

125FX NG, 125FX LP specifications

Bosch Appliances has been a leader in the home appliance industry for decades, known for their innovation, efficiency, and reliability. Among their notable offerings are the Bosch 125FX LP and 125FX NG, two versatile models designed for modern kitchens that cater to the needs of both home cooks and professional chefs.

One of the standout features of the Bosch 125FX models is their dual-fuel capability. With options for liquid propane (LP) and natural gas (NG), these appliances provide flexibility in fuel choice, maximizing efficiency and performance. Users can select the type of gas that best suits their culinary style and kitchen setup, ensuring optimal cooking results.

Both models boast a powerful burner system that includes multiple high-performance burners. Featuring a high-output burner designed for rapid heating, these appliances allow for quick boiling and searing, making them ideal for time-sensitive cooking. Additionally, a simmer burner is included which provides low heat for delicate sauces and simmering dishes, striking a balance between power and control.

The Bosch 125FX series incorporates advanced cooking technologies that elevate the user experience. One significant technology is the precise temperature control, which ensures that cooking temperatures remain consistent, reducing the risk of overcooking or burning meals. The built-in oven features a convection cooking option, allowing for even heat distribution, resulting in perfectly baked goods and roasted dishes.

Another notable characteristic of these appliances is their sleek and modern design. Bosch has a reputation for creating aesthetically pleasing products that fit seamlessly into contemporary kitchen environments. Premium materials, rounded edges, and clean lines give the 125FX models a sophisticated look that appeals to style-conscious consumers.

User-friendly features are also prominent in both the LP and NG models. Intuitive knobs and controls allow for easy adjustments, while the large oven capacity provides ample space for multiple dishes, perfect for families or entertaining guests. Additionally, Bosch's commitment to energy efficiency means these appliances not only save on energy bills but also decrease the environmental footprint of your home.

In summary, the Bosch 125FX LP and 125FX NG are premier appliance choices for anyone looking to enhance their kitchen. With powerful cooking capabilities, innovative technologies, and a stylish design, they encapsulate Bosch's commitment to quality and performance in home appliances.
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