Display Flashes “05” when button is pressed:

 

 

 

 

 

 

 

Possible Cause

Remedy

 

 

 

 

 

 

 

1.

Temperature Probe wiring

1. Repair Wiring

 

 

 

open

 

 

 

2.

Defective probe

2. Replace probe

 

 

 

 

 

 

 

 

 

 

 

Display Flashes “15” when button is pressed:

 

 

 

 

 

 

Possible Cause

Remedy

 

 

 

 

 

 

 

1.

No water in tank and tank

1. The symptom does not

 

 

 

in freezing conditions

reflect a control problem

 

 

2.

Water in tank above freezing

2. Temperature probe out of

 

 

 

 

tolerance, replace temp.

 

 

 

 

probe

 

 

 

 

 

 

 

 

 

 

 

Display Flashes “25” when button is pressed:

 

 

 

 

 

 

 

Possible Cause

Remedy

 

 

 

 

 

 

 

1.

Water in tank is low, probe

1. Fill tank

 

 

 

immersed in steam

 

 

 

2.

Probe wiring shorted

2. Repair wiring

 

 

3.

Defective probe

3. Replace probe

 

 

 

 

 

 

 

 

 

 

 

ECO SWITCH OPEN (Figure 22)

ECO LED Flashing:

ECO SWITCH OPEN, ECO LED Flashing

FIGURE 22

 

 

 

 

 

Possible Cause

Remedy

 

 

 

 

 

 

1. This indicates the control has

1. Press button on the

 

 

failed on of its internal

display board to reset

 

 

diagnostic self-tests.

control. If this error

 

 

 

occurs repeatedly,

 

 

 

replace control.

 

 

 

 

 

 

 

 

 

CONTROL BAD (Figure 23)

 

 

All LEDs Flashing:

 

 

CONTROL BAD, All LEDs Flashing

FIGURE 23

 

Possible Cause

Remedy

 

 

 

1.

Temp. Probe unplugged

1. Check connectors

2.

Temp. probe wiring damaged

2. Repair wiring

3.

Water in tank too hot

3. Normal condition when

water t e m p e r a t u r e exceeds safety limit. Allow water to cool or admit water into tank and manually reset the control. Determine cause for overtemp condition.

COMBUSTION AIR BLOCKAGE (Figure 24)

Pressure Switch LED Flashing:

COMBUSTION AIR BLOCKAGE, Pressure Switch LED Flashing

FIGURE 24

Possible Cause

 

Remedy

 

 

 

 

1.

Combustion air blocked

1.

Check exhaust piping and

 

 

 

flue for obstructions

2.

Blower not operating:

2.

a. Repair wiring

 

a. Check blower wiring

 

b. Replace blower motor

 

b. Check blower motor

 

 

3.

Defective air switch

3.

Replace air switch

4.

Pressure switch jumped out

4.

This controller must sense

 

 

 

an open contact on the

 

 

 

blower proving airflow

switch before the blower comes on. Check to see if blower proving airflow switch is still connected to the unit.

17

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Image 17
A.O. Smith BTH 120 - 250 warranty Display Flashes 05 when button is pressed
Page 16 Page 18

BTH 120 - 250 specifications

The A.O. Smith BTH 120 - 250 is a high-efficiency water heater designed for commercial and industrial applications, renowned for its advanced technology and durable construction. This model stands out for its ability to provide reliable hot water while minimizing energy consumption, making it an ideal choice for businesses looking to enhance operational efficiency.

One of the main features of the A.O. Smith BTH series is its innovative design that integrates cutting-edge condensing technology. This system maximizes energy use by capturing and reusing heat that would otherwise be lost in traditional water heating methods. As a result, the BTH 120 - 250 delivers exceptional thermal efficiency ratings, often exceeding 90%, thereby reducing overall operating costs.

The BTH series is available in various capacities, ranging from 120,000 to 250,000 BTU per hour, ensuring that it meets the diverse needs of different businesses. This flexibility allows for installation in a variety of settings, from small restaurants to large manufacturing facilities.

Another significant characteristic of the BTH 120 - 250 is its robust construction. Built with high-quality materials, this unit is designed to withstand the rigors of continuous use. Its stainless steel heat exchanger resists corrosion and scale build-up, providing longevity and reduced maintenance requirements.

Safety features are integrated into the BTH series as well. It includes an electronic ignition system that eliminates the need for a standing pilot light, enhancing operational safety and reducing energy waste. Additionally, the built-in diagnostic system allows for quick identification of issues, streamlining maintenance procedures.

The BTH series also emphasizes user-friendly operation. Equipped with advanced control options, operators can monitor and adjust performance settings effortlessly. The digital display provides real-time operational data, which can assist in optimizing performance and ensuring consistent hot water availability.

In summary, the A.O. Smith BTH 120 - 250 is an exceptional choice for commercial water heating, combining high efficiency, advanced technology, and robust durability. Its innovative design, safety features, and user-friendly controls position it as a trusted solution for businesses seeking reliable hot water systems. By investing in this model, operators can ensure optimal performance while enjoying significant energy savings over time.
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