Bradford White eF Series Service Manual

Does inlet gas pressure
drop more than 2" W.C.
during burner ignition?
Adjust gas
supply regulator
Inadequately
sized regulator.
Y
N
N
Y
N
Y
N
IGNITION MODULE
Verify Minimum Gas Supply Piping Requirements of:
Minimum ¾” NPT. (Schedule 40 black Iron Pipe
recommended).
Reconfigure gas
supply piping
Y
Observe burner operation through the sight glass located on the combustion insert mounting flange.
Normal burner operation should ignite smoothly, without evidence of coughing or huffing upon
ignition. The burner flame should be a blue flame near the burner surface in a uniform flame pattern.
Occasional yellow or white streaks are normal.
Inlet gas
pressure tap
Venturi
adjustment
14
Is igniter resistance
less than 150 Ohms
(cold)?
(see check igniter
illustration)
Refer to ignition module illustration below,
is there 120VAC across terminals
P6(1) and P6(2)?
(Note: Igniter LED must be lit during this check).
Y
N
Replace
hot surface igniter.
(see pg 31)
Replace ignition
module.
(see pg 34)
N
Y
Do you see the igniter
glowing through burner
site glass during the
warm up period?
Proceed to page 19
With manometer, check inlet
gas pressure. Is it stable
between 7" & 14" W.C. static?
(heater not running)
(see illustration 14)
Is gas supply pressure
regulator adjustable to
maintain proper and
stable setting?
Y
N
Page 18
Volt meter set to
OHM setting
Meter probe
Hot surface
igniter
CHECK IGNITER
RESISTANCE
SERVICE PROCEDURE EF-II
Combustion System Testing and Replacement
WARNING
120 volt potential
exposure. Use caution
making voltage checks to
avoid personal injury.
WARNING
Removing screw from
inlet gas pressure tap will
immediately allow gas to
flow from pressure tap.
Page 18

Bradford White eF Series Specifications

General

Type	Tank
Efficiency	High Efficiency
Vent Type	Power Vent
Fuel Type	Natural Gas or Propane
Recovery Rate	Varies by model
Capacity	40-100 gallons
Warranty	6 or 10 Year Limited Tank & Parts Warranty (varies by model)

Summary

Troubleshooting

System Observation

LED Status and Probable Cause

Guides troubleshooting by correlating ignition module LED status with potential causes of failure.

Thermostat Circuit Testing and Replacement

Thermostat Board Replacement Procedure

Thermostat Potentiometer Replacement Procedure

Thermostat Sensor Replacement Procedure

Combustion System Testing and Replacement

Combustion System Removal Procedure

Steps for safely removing the combustion assembly for inspection or replacement.

Combustion System Replacement Procedure

Instructions for installing a new or reconditioned combustion assembly.

Burner Tube Inspection and Replacement

Burner Tube Inspection

Visual inspection guide for the burner tube's ceramic fiber mesh and internal condition.

Burner Tube Replacement Procedure

Step-by-step instructions for replacing the burner tube and associated gaskets.

Gas Valve Replacement

Blower Testing and Replacement

Blower Replacement Procedure

Step-by-step instructions for removing and installing a new blower assembly.

Exhaust Pressure Switch Testing and Replacement

Check Collector Pressure

Diagnostic procedure to check pressure at the exhaust collector tap.

Exhaust Pressure Switch Replacement Procedure

Hot Surface Igniter Testing and Replacement

Hot Surface Igniter Replacement Procedure

Flame Sensor Testing and Replacement

Flame Sensor Replacement Procedure

Ignition Module Replacement

Transformer Replacement

Intake Pressure Switch Testing and Replacement

Intake Pressure Switch Replacement Procedure

Vent Safety Switch Testing and Replacement

Vent Safety Switch Replacement Procedure

Anode/Flue Baffle Inspection and Replacement