Water is TOO HOT

system preventing the pressure drop in the Aquastar (i.e. cold water is entering the water heater from both sides and the burners will not come on).

To confirm there is no crossover in the plumbing, shut off the cold water supply to the AquaStar. Open your hot water taps.

There should not be any water flowing. If there is water flowing, there is a crossover in the plumbing. This is a plumbing problem, not anAquastar problem. Please contact your plumber.

7.Water valve parts may be dirty or components damaged.

First check that the venturi is free from dirt particles. Water valve and component parts must be totally free of dirt. In hard water areas, mineral deposits can eventually (3 to 5 years in hard water areas) corrode the water valve parts to a point where they will need replacing. Any sign of moisture or corrosion at the joint of the water valve and the gas valve is a sign that the water valve assembly components need to be replaced immediately.

Note: Water valve for model 125BL is part # 8707002478 for both LP and NG models. (Contact service person to clean water valve or replace if corrosion is present).

PILOT LIGHT GOES OUT DURING OR AFTER USE

1. Gas pressure too low

Very low gas pressure may be caused by low delivered gas pressure, a jammed gas regulator or undersized gas lines. If the gas lines are undersized, there may still be the specified static gas line pressure. However when the water valve opens,and gas enters the burners, the pressure could drop sharply, causing the pilot flame to go out. Have a gas technician confirm the gas pressure both static and at maximum Btu output. Specifications for your heater are on page 2.

2. Pilot may be dirty or weak

See Page 9 for instructions on pilot maintenance.

3.Burners are not shutting down immediately when hot water is turned off or when a circulator pump has stopped operating

Note: If burners don’t shut down immediately when the hot water is turned off, the heater will overheat and the ECO will shut-off the gas. Rebuild the water valve assembly using the repair kit from CEC (part#8 703 406 214).

4. Temperature controls are set too high

If unit is plumbed in a recirculating loop system insure that the aquastat or relay for the primary circulator pump is set for no hotter than 140°F. This is necessary to prevent pilot outage due to overheating. The temperature slide control on the 125BL may also need to be lowered to prevent overheating.

1. Gas flow is higher than necessary. Move gas control slide to the left.

2. Temperature (aquastat) control is set too high

If unit is plumbed in a recirculating loop system the aquastat

temperature relay for the primary circulator pump is possibly set too high.

WATER IS NOT HOT ENOUGH

1.Water flow rate is too high. Decrease the flow rate.

2.Gas flow is not optimal Move gas control slide to the right.

3.Temperature (aquastat) control is set too low

If unit is plumbed in a recirculating loop system the aquastat temperature relay for the primary circulator pump is possibly set too low.

4.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 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 pages 2 for correct gas pressure settings.

5.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.

6.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 #5).

7.Parts in water flow valve are corroded so that the gas passage is not fully opening

Contact your service person or Controlled Energy.

HOT WATER TEMPERATURE FLUCTUATES

1.Cold water is mixing with the hot water between the AquaStar and the outlet (if not being used with a circulator pump)

See #5 under “Burners do Not Ignite When Hot Water Turned On”.

2.Storage in tank (recirculating system) has not fully recovered

Storage capacity in tank is inadequate. Increasing tank size, setting slide control higher for a fast recovery or adding a second 125BL for even a faster recovery is suggested.

3. Insufficient gas pressure

Note required gas pressures (page 2) and consult gas ser- vice person.

125B NGL, 125B LPL specifications

Bosch Appliances has established itself as a leader in home innovation, offering cutting-edge products designed to enhance everyday living. Among their notable offerings are the Bosch 125B LPL and 125B NGL models, both engineered to meet the needs of modern households.

The Bosch 125B LPL features a sleek design, making it a stylish addition to any kitchen. It operates with a low noise level, allowing for an unobtrusive cooking experience. One of its standout features is the powerful performance it delivers, thanks to its innovative cooking technologies. The induction cooking system ensures rapid heating and precise temperature control, allowing users to cook their meals to perfection. The residual heat indicator is another excellent feature, ensuring safety by alerting users to hot surfaces.

On the other hand, the Bosch 125B NGL focuses on providing versatility and convenience in the kitchen. This model is equipped with advanced gas cooking technology that offers instant heat and adjustable flame control. This ensures that home chefs can simmer, sear, and sauté with precision. The integrated safety features, including a flame failure device, provide peace of mind while cooking.

Both models embody Bosch’s commitment to energy efficiency. They are designed to minimize energy consumption while maximizing performance, which is a significant advantage for environmentally conscious consumers. Additionally, the interface on both appliances is user-friendly, featuring intuitive controls that make it easy to navigate settings and cooking modes.

Bosch has also incorporated smart technology into these models, allowing users to connect their appliances with home networks for added convenience. This can include features such as remote monitoring and control, enabling homeowners to manage their cooking seamlessly.

In terms of durability, both the 125B LPL and the 125B NGL are built with high-quality materials that ensure longevity and reliability. Bosch’s reputation for fine craftsmanship is evident in every aspect, from their robust construction to the aesthetic details.

In conclusion, the Bosch Appliances 125B LPL and 125B NGL models represent the pinnacle of modern kitchen technology. With their powerful performance, energy efficiency, and user-centric features, they are perfect for those who appreciate gourmet cooking as well as everyday meal preparation. Bosch continues to redefine the culinary experience, making cooking not just a task, but an enjoyable journey.