Bradford-White Corp M-2-50T6DS Service Procedure RE-I, Line Voltage & High Limit ECO Testing

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SERVICE PROCEDURE RE-I

Line Voltage & High Limit (ECO)

Testing

Line Voltage Testing

1.Turn “OFF” power to water heater.

2.Remove access cover(s) from front of water heater. Remove insulation and plastic cover from thermostat.

WARNING

High voltage exposure. Use caution when

making voltage checks to avoid personal injury.

3. Set multi-meter to volts AC.

4.Turn power “ON” to water heater.

5.Check voltage across terminals L1 & L3 of upper thermostat (see illustration 2).

A)Rated voltage IS present, power to the water heater is okay.

B)Rated voltage NOT present, Check circuit breaker at service panel.

Illustration 2

ECO reset

button

Illustration 3

High Limit (ECO) Testing

1.Check voltage across terminals L1 & L4 upper thermostat (see illustration 3).

A)Rated Voltage IS present, ECO is okay.

B)Rated voltage NOT present, proceed to step 2.

2.Turn power “OFF” to water heater and firmly press ECO reset button on thermostat(s). Turn power “ON” and recheck voltage across terminals L1 & L4 of upper thermostat

(see illustration 3).

A)Rated voltage IS present, the ECO has opened indicating the water in the tank is or has over heater. Check the following:

1.Thermostat must be in full contact with tank.

2.Be sure heating element(s) is not shorted to ground (see page 15).

3.Proper thermostat operation (see procedures beginning on page 16).

B)Rated voltage NOT present, water in tank may be over heated.

1.If water is hot, turn “OFF” power to water heater and flow water through tank to cool below set point of upper thermostat. Recheck voltage per step 1.

2.If water is cool, Replace upper thermostat.

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Contents Troubleshooting Guide Instructions for Service Table of Contents General Information RED BlackWattage Limitations at Various Voltages Surface Mounted Thermostats Sequence of Operation Sequence of Operation- Single Element OperationNon-Simultaneous and Simultaneous Operation Circuit two Thermostat closed At terminal T4 At terminal T2 Thermostat open At terminal T2 From Off Peak Meter Troubleshooting Quick Step Plan to Hot Water Service Procedure RE-I Line Voltage & High Limit ECO TestingService Procedure RE-II Heating Element TestingService Procedure RE-III Water In Tank Is Cold With Power onDouble Element, Non-Simultaneous, Single Phase Operation Be sure thermo stats are reset to their original Service Procedure RE-III Service Procedure RE-III Double Element, Simultaneous, Three Phase Operation Service Procedure RE-III Turn power on to water heater Set multi-meter to Volts AC Be sure thermo stats are reset to their original Service Procedure RE-IV Be sure thermostats are reset to Double Element, Simultaneous, Single Phase Operation Service Procedure RE-IV Tank Does Not Deliver Enough Hot Water Service Procedure RE-IV Service Procedure RE-IV Service Procedure RE-IV Service Procedure RE-V Thermostat RemovalHeating Element Removal Service Procedure RE-VII Anode Inspection and ReplacementGeneric Parts List Page Page Page Parts@bradfordwhite.com Techserv@bradfordwhite.com

M-2-50T6DS specifications

Bradford-White Corp is renowned for its commitment to quality and innovation in water heating solutions, and the M-2-50T6DS model exemplifies this philosophy. Designed to meet the needs of both residential and light commercial applications, this 50-gallon gas water heater is engineered for efficiency, reliability, and ease of use.

One of the standout features of the M-2-50T6DS is its high recovery rate, which is achieved through a powerful atmospheric vent design that allows for quick heating of water. The heater’s 40,000 BTU per hour input ensures that there is always a sufficient supply of hot water available when needed. This makes the unit ideal for households with multiple bathrooms or for commercial settings where high hot water demand is common.

The Bradford-White M-2-50T6DS incorporates a state-of-the-art ignition system known as the Direct Spark Ignition (DSI). This technology provides a reliable start-up with minimal energy consumption, enhancing both safety and efficiency. The DSI system reduces the risk of pilot light outages and simplifies the ignition process, making it user-friendly.

In terms of construction, the M-2-50T6DS is built with a robust design featuring a glass-lined tank for superior corrosion resistance. This durable tank is insulated with CFC-free foam, ensuring optimal heat retention and minimizing energy loss. Coupled with the unit's Energy Factor rating, it reflects Bradford-White's dedication to energy efficiency, offering long-term savings on utility bills.

Another notable characteristic is the heater's integrated thermal expansion tank, which helps manage water pressure and reduces damage to your plumbing system, thereby enhancing the overall longevity of both the heater and your home’s plumbing infrastructure.

Safety is a priority with the M-2-50T6DS as well. The model is equipped with a dual-sensor thermostat that monitors the temperature and adjusts accordingly to prevent overheating. Additionally, it features a temperature and pressure relief valve for added safety, ensuring that the unit operates within safe parameters.

In summary, the Bradford-White M-2-50T6DS water heater epitomizes advanced engineering and high performance. With a focus on efficiency, reliability, and safety, this model is an excellent choice for anyone in need of a dependable source of hot water, demonstrating Bradford-White's unwavering commitment to quality in the water heating industry.
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