SECTION XI: DIAGNOSTIC AND TROUBLESHOOTING GUIDE

DIRECT SPARK HONEYWELL INTEGRATED CONTROL SYSTEM

SEQUENCE OF OPERATION

1.When the tank temperature drops below the temperature setpoint on the display, the control sends power to the combustion blower for a 30 second pre-purge period.

2.At the end of the pre-purge period, the control sends high voltage through the spark cable to the spark rod to spark to the burner. The gas valve also opens. If the burner lights, a microamp current is generated through the flame sense rod allowing the control to detect burner flame. The sparking then ceases and the flame is monitored by the flame sense circuit until the tank temperature reaches the thermostat setpoint and turns off the gas valve.

3.If the burner fails to light, the gas valve closes, sparking to the burner stops, and the combustion blower continues to operate for 60 seconds to purge the heat exchanger of unburned gas. The ignition trial is repeated. The control will make 3 attempts to ignite the burner. If the burner fails to light after the third attempt, the control enters “Soft Lockout”, which is an idle period for 60 minutes. There will be an error code 62 or 63 shown on the water heater display indicating that the control cycled through the maximum number of ignition retries for ignition. The control will make another 3 ignition attempts after the 1 hour waiting period.

4.If the exhaust vent terminal should become blocked or the condensate drain becomes plugged, the exhaust vent pressure switch will open and the gas valve closes. The combustion blower will continue to operate. An error code 29 is shown on the water heater display. Removing the blockage will resume normal operation.

5.The burner flame is monitored by the flame sense circuit and if the flame should extinguish, the gas valve closes and the combustion blower will operate to purge the heat exchanger before making an attempt to relight the burner. There may be 3 attempts to relight the burner before going into the Soft Lockout period explained previously.

6.The burner will continue to operate during the heating cycle until the tank temperature reaches the setpoint. The gas valve opens and the combustion blower continues to operate for 30 seconds to purge the heat exchanger of flue gases.

7.If for some reason, the tank temperature should exceed 200°F (93°C), then the control closes the gas valve and goes into a “Hard Lockout” state and will not operate until reset by a qualified service person. The display will read error code “65”, which indicates the tank high limit temperature has been exceeded. No attempt should be made to reset the control until a service person has corrected the cause of the high limit condition. Refer to the diagnostic service section at the end of this Installation and Operating Instruction Manual.

51

Page 50 Page 52
Page 51
Image 51
Bradford-White Corp EFR-1-60T1206EN, EFR160T120 warranty Section XI Diagnostic and Troubleshooting Guide
Page 50 Page 52

EFR-1-60T1206EN, EFR160T120 specifications

Bradford-White Corporation is a leading manufacturer of residential and commercial water heating solutions, and one of its standout products is the EFR160T120, also known as the EFR-1-60T1206EN. This innovative electric water heater is designed for those seeking reliable performance, energy efficiency, and long-lasting durability.

The EFR160T120 has an impressive capacity of 60 gallons, making it suitable for households with higher hot water demands. This model features a compact design, allowing it to fit into various installation spaces, such as utility rooms or small basements, without compromising on performance. Its vertical configuration and dimensions ensure that it occupies minimal floor space while delivering optimal hot water supply.

One of the most notable features of the EFR160T120 is its high-efficiency electric heating elements. This water heater is equipped with multiple heating elements that provide quick recovery rates, ensuring that hot water is readily available when it is needed most. The intelligent design employs a top-mounted thermostat that allows for accurate temperature control, promoting consistent hot water delivery for showers, baths, and household chores.

In terms of technology, the EFR160T120 incorporates advanced insulation technology that minimizes heat loss, enhancing energy efficiency. This feature not only contributes to reduced energy bills but also lowers carbon emissions, aligning with modern eco-conscious standards. The unit features an integrated temperature and pressure relief valve, which enhances safety by preventing excessive pressure build-up and protecting the tank from potential damage.

Durability is another strong suit of the EFR160T120, as it is constructed from high-quality materials. The tank is coated with a glass lining that protects against corrosion, extending the overall life of the unit. The heater is also backed by Bradford-White's reputation for quality craftsmanship, providing peace of mind for consumers.

Furthermore, the EFR160T120 is designed with user convenience in mind. Maintenance is straightforward, and replacement parts are readily available, which facilitates easy repairs and servicing. Overall, the Bradford-White EFR160T120 water heater stands out as a reliable and efficient choice for homes that require ample hot water supply without sacrificing space or energy efficiency.
Top Page Image Contents