Exhaust Pressure Switch Testing and Replacement

For serial numbers prior to “CF”

Sequence of operation:

With the thermostat calling for heat, prior to energizing blower, the ignition module checks the exhaust pressure switch for normal switch position of normally open. If the exhaust pressure switch contacts are closed (not in normal position), the ignition module waits 45 seconds for the pressure switch contacts to open. If the pressure switch contacts do not open after 45 seconds, the ignition module locks out with the PURGE LED flashing indicating a pressure switch fault.

LED Status

Only power LED is on, or

Purge LED flashing.

Safety Circuit Trace

WARNING

120 volt potential exposure. Use caution

making voltage checks to avoid personal injury.

Does blower

N

energize?

 

Y

 

Call technical

support.

N

Does heater

function?

Is there continuity

Through GREY Y wire leads of heater side safety circuit harness?

(see photo below)

N

Depress reset button on vent

Y

safety switch. Is

there continuity

 

 

across high limit

Is there continuity

through RED

wire leads of heater side safety circuit harness?

(see photo below)

Y

Check PURGE LED status

on ignition module,

Flashing after 45 seconds?

NSafety Circuit OK,

(see “Blower Testing

& Replacement”)

Replace exhaust

Ypressure switch (see “Exhaust Pressure Switch Replacement

Procedure”)

Y

Verify proper

switch operation. (see “Vent Safety Switch Testing and Replacement”)

switch?

(see photo below)

N

Replace vent safety

switch.

(see “Vent Safety

Switch Replacement

Procedure”)

Control side

Heater side

harness

harness

Check PURGE LED status.

On within 5 minutes?

Y

 

 

Pressure switch is OK.

 

 

 

 

N

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Flashing after

N

 

 

Call for technical

5 minutes?

 

 

 

support.

 

Y

 

 

 

 

Check blower for proper

 

N

 

Correct blower problem

operation (see page 27)

 

 

(see “Blower Testing and

 

 

 

Is blower OK?

 

 

 

Replacement”)

Y

Reset button

Refer to

“Check Collector Pressure”

(see next page)

54

54

Page 54
Image 54
Bradford-White Corp EF100T199(E)*(N Only power LED is on, or Purge LED flashing, Is there continuity Through RED, Harness

EFR160T120*(EN, EF100T250(E)*(N, EF100T399(E)*(N, EF100T300(E)*(N, EF60T125(E)*(N specifications

Bradford-White Corporation is a leading manufacturer of water heating solutions, known for its high-quality and durable products. Among its extensive product lineup, the EF60T150(E)*(N), EF100T150(E)*(N), EF60T199(E)*(N,X)(A)(2), and EF100T199(E)*(N) models stand out for their impressive features and technologies that cater to both residential and commercial water heating needs.

The EF60T150(E)*(N) model is designed for medium to large households, providing a reliable hot water supply. It features a 60-gallon tank with a first-hour delivery rate that ensures ample hot water, making it ideal for simultaneous usage in multiple applications. This water heater operates on natural gas, boasting high energy efficiency ratings due to its advanced burner technology. The environmentally friendly design reduces greenhouse gas emissions while delivering consistent performance.

Similarly, the EF100T150(E)*(N) model provides an even larger capacity of 100 gallons, addressing the hot water demands of larger families or commercial establishments. It employs Bradford-White's Hydrojet Total Performance System, which minimizes sediment buildup and optimizes hot water output. This model also features a patented Vitraglas lining that protects the tank from corrosion, extending its lifespan and enhancing reliability.

On the other hand, the EF60T199(E)*(N,X)(A)(2) and EF100T199(E)*(N) models offer advanced technology with their unique "N" designation, indicating that they are equipped to handle more extensive heating requirements efficiently. The EF60T199 model, with its 60-gallon capacity, and the EF100T199, with 100 gallons, incorporate enhanced insulation to reduce heat loss and improve energy efficiency. Both models are designed for easy installation and maintenance, making them user-friendly for both homeowners and technicians.

Additionally, these water heaters feature advanced electronic ignition and controls that allow for precise temperature regulation and easy monitoring. The intuitive user interface simplifies operation, while built-in safety features ensure reliable and secure hot water delivery.

Overall, Bradford-White's EF series of water heaters, including the EF60T150(E)*(N), EF100T150(E)*(N), EF60T199(E)*(N,X)(A)(2), and EF100T199(E)*(N), exemplify the company's commitment to quality and innovation. With their robust performance, energy efficiency, and advanced technologies, these models offer dependable hot water solutions tailored to meet the diverse needs of today's consumers. Whether for residential or commercial use, Bradford-White continues to set the standard for excellence in water heating technology.