Bradford-White Corp M-2-50T6DS service manual Sequence of Operation

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SEQUENCE OF OPERATION

Residential and light duty commercial electric water heaters are designed to operate using several different operating modes. The common modes and sequence of operation are as follows:

1.Single Element Operation.

2.Double Element Non-Simultaneous Operation (single phase).

3.Double Element Non-Simultaneous Operation (3 phase).

4.Double Element Simultaneous Operation (single phase).

5.Double Element Simultaneous Operation (3 phase).

Sequence of Operation- Single Element Operation.

1Line voltage is applied across terminals L1 &L3 of the thermostat. ECO is closed, so there is voltage at terminal L4 and to one side of the element.

2Tank is cold therefore thermostat

is closed at terminal T2 (calling for heat). This completes the circuit and allows current to flow through the element.

1

ECO

Closed

2

Thermostat closed

at terminal T2

3When the thermostat is satisfied, it opens at terminal T2 interrupting current flow through the element. System is now in stand-by mode, waiting for the next call for heat.

3

Thermostat opens

at terminal T2

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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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