Manuale d’uso / di manutenzione del prodotto EF100T250(E)*(N del fabbricante Bradford-White Corp
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Save this manual for future reference Manual 238-45817-00F SERVICE MANUAL Troubleshooting Guide and Instructions for Service (To be performed ONLY by qua lified servi ce providers) Models Covered by T.
The Bradford White 2 Page eF Service Procedure Introduction 3 - - - How to use this manual 4 - - - Tool required for service 4 - - - Features 5 - - - Specifications 6 - - - Sequence of Operation 10 - .
The Bradford White eF Series ® Ultra High Efficiency Water Heater uses a low Nox premix power burner located at the top of the water heater to direct a turbulent flame down into a submerged combustion chamber. This turbulence causes a thorough mixing of gas and air for optimum combustion.
It is intended for this manual to be used by qualified service personal for the primary purpose of troubleshooting analysis and repair of the Bradford White eF Series ® Ul tra High Efficiency Water Heater. Understanding the sequence of operation section of this manual will contribute greatly to troubleshooting this product.
Attractive digital water heater display on control panel for setting and displaying the temperature setpoint. Pressing temperature UP and DOWN buttons changes the temperature setpoint. Same water heater display used on all models. Temperature format may be displayed in °F or °C.
EFR-1-60T-120 EF60T1 25 EF60T1 50 EF60T1 99 EF100T150 EF100T199 EF100T250 EF100T300 EF100T399 120,000 125,000 150,000 199,999 150,000 199,999 250,000 300,000 399,999 180 187 211 265 250 309 364 405 521 345 363.6 422.7 557.6 450.5 597 734.8 836.4 1,127 138 145.
7 Thermostat Sensor 11,900 Ohms @ 70°F, ECO opens @ 201°F Max., ECO close @ 100°F Min. Thermostat Board Max temp 180°F, Min temp 91°F, 24VAC, 60Hz max. Hot Surface Igniter 120VAC, 30-120 ohms @ room temperature. Flame Sensor Output Minimum 1 micro amp, Typical range 4 to 7 micro amps.
8 Power supply Dedicated 120 VAC, 60 Hz, 15 A Thermostat Sensor 11,900 Ohms @ 70°F, ECO opens @ 207°F Max., ECO close @ 120°F Min. Redundant sensor for ECO. Sensor inside well for easy replacement of sensor. Spark Rod Igniter 0.22" nominal gap to the burner surface.
Notes: 1) Multiply the total number of 90° elbows (intake and exhaust) by 5 feet. Do not include the termination fittings or 3" condensate elbow. 2) Multiply the total number of 45° elbows (intake and exhaust) by 2 ½ feet. 3) Add this to the total length of straight pipe - intake and exhaust.
1 Thermostat calls for heat. -Prior to energizing blower, ignition module checks safety circuits for normal switch positions: a) Vent temp switch normally c losed.
If normally closed pressure switch conta cts open during burner operation, gas valve clo ses, burner shuts off. Blower restarts after 30 seconds and runs 5 minutes to wait for pressure switch to close. If not, locks out. The system will go into lock out mode for the following reasons: - Pressure switches stuck open or closed.
1 Thermostat calls for heat. 2 Blower energizes, pressure switch contacts are normally closed. If the pressure switch co ntacts are open, blower operates for up to 5 minutes waiting for contacts to close, then blower stops and flashes red PURGE LED indicating lock- out condition.
Lockout conditions: The system will go into lock out mode for the following reasons: Blocked vent pressure switch contacts open: Check for obstruction in exha ust pipe and vent terminal. Check for blocked condensate trap or drain line. In cold climates, make sure drain is not frozen.
For models with Honeywell Integrated Control System w/ Direct Spark Ignition T hermostat calls for heat. Combustion blower starts. Blower pre-purge period of 30 seconds. Trial for Ignition. (5 seconds, 3 trials). Flame establishing period (3 seconds), gas valve opens, sparks from spark rod to burner surface to ignite the gas.
For models with Honeywell Integrated Control System w/ Direct Spark Ignition The system will go into lock out mode for the following reasons: 1. ERROR CODE 62 or 63 Control board will go into “Soft Lockout” if the main burner cannot be lit or fails to prove flame after 3 ignition trials.
Refer to ignition module illustration, is there 120VAC between P1(1) and P1(3) ? Is front panel power switch light on, indicating power? Y N Position front panel power switch to “ON” position. Is there 120VAC across switch? (see photo at right) Light burned out, replace switch.
Determine failure mode by observing flashing LED status on ignition module. LED status and probable cause shown below. * Denotes conditions that may require the water heater to be isolated from the vent system to determine root cause. LED status & probable cause For models with Hot Surface Ignition LED STATUS Power & flame light flashing.
System Observation For models with Direct Spark Ignition Water Heater Fault: Water heater does not operate Display Error Code: Water heate r display does not operate - blank display Check main power supply to water heater - fuse, circuit breaker, plug receptacle, line cord or wiring to water heater.
System Observation For models with Direct Spark Ignition Does combustion blower operate? Error code #29 on display. Refer to C ontrol Board illustration. Measure voltage between terminals P7(3) & P7(5) on the “inducer” output (make sure the control display shows “heating” in the status mode, if not increase the setpoint).
Accessing Service Mode on Control Display For models with Honeywell Integrated Control T he display has a “service mode” for changing the maximum setpoint and accessing info rmation in aiding servicing of the water heater. This procedure is for service and installation personnel only.
Accessing Service Mode on Control Display For models with Honeywell Integrated Control 1. Max Setpoint (Display/Change) 2. Tank Sensor Temperature Displayed Wa ter Temperature Average.
Accessing Service Mode on Control Display For models with Honeywell Integrated Control 4. Setpoint (Display/Change) S ELECT SET Status ° F i dle setpoi nt O perat ion al 5. °F/°C (Display/Change) S ELECT SET S tatu s °F/C° idle O peratio nal °F s etpoi nt 6.
Accessing Service Mode on Control Display For models with Honeywell Integrated Control 7. Software Version (Display only) 8. Error Code History (Displays if there are present error codes o r up to 10 previous error codes). Water Heater Display will show a “--“ if there are no error codes.
Accessing Service Mode on Control Display For models with Honeywell Integrated Control S tep 2: Press “Set” button to enter setting mode. “Max Setpoint” will flash to indicate setting mode. Step 3: Press the “UP” or “DOWN” buttons to change the maximum setp oint value.
Accessing Service Mode on Control Display For models with Honeywell Integrated Control Step 5: 30 Seconds after the last button press, the Water Heater Display will go back to “User Mode”. It will read “Max S etpoint” without showing a te mperature value if the temperature setpoint is at th e maximum setting.
Accessing Service Mode on Control Display For models with Honeywell Integrated Control To Display Flame Sense Current of the Pilot Flame Sensor: The pilot flame sense current is available only when the burn ers are in operation. Step 1: Make sure the status displays “Heating” or draw enough hot water to start the burners.
Accessing Service Mode on Control Display For models with Honeywell Integrated Control Step 2: Press the “Set” button to enter the setting mode. “Setpoint” will flash in the water heater display.
Accessing Service Mode on Control Display For models with Honeywell Integrated Control Step 5: When the desired setpoint is reached on the water heater display, press the “Set” button to confirm the new setpoint. “Setpoint” stops flashing in the water heater display.
Accessing Service Mode on Control Display For models with Honeywell Integrated Control Step 3a: Press “Temperature Up” bu tton to change temperature format to °C SELECT SET Status idle Operati on.
Accessing Service Mode on Control Display For models with Honeywell Integrated Control Step 5: Pressing “Select” button will return display to setpoint in format selected (°F or °C) immediately .
Accessing Service Mode on Control Display For models with Honeywell Integrated Control To view previo us error codes: Step 1: In “Service Mode press the “Select” button until the next display after the “Software Version”. If there are no current error codes, the display will show -- .
Accessing Service Mode on Control Display For models with Honeywell Integrated Control Step 4: Press the “Temperature Down” button to change to the previous code index, code #9. SELECT SET Status idle Operati onal % Step 5: Press the “Select” button for code ind ex #9 to view if there are any code numbers.
Error Code Definitions For models with Honeywell Integrated Control ERROR CODE DEFINITIONS I f the water heater has an operating problem, there will be a numbe r in the water heater display with “Service Needed” shown below the error code number. Note the error code an d the definition in the chart below.
Resetting Error Codes For models with Honeywell Integrated Control WARNING The following procedure is for service and installation personnel only. Resetting lockout conditions without correcting the malfunction can result in a hazardous condition.
IMPORTANT NOTE: This procedure assumes a cool tank WARNING 120 volt potential exposure. Use caution making voltage checks to avoid personal injury. CAUTION Use caution not to damage connectors when ma.
Condition: Water Heater Not Operating Display shows error code “65” High Water Temperature (over 200 °F) (Continued from previous page) Once cause of overheating con dition has been diagnosed and corrected, the control ma y be reset Reconnect and switch on power to the water heater.
Refer to ignition module i llustration, Is there 24VAC between P3(7) and P3(8) ? Y OK, thermostat is calling for heat. Turn off power to heater. Disconnect YELLOW and RED wires from the thermostat board at location N .O. and COM shown in photo at right.
° F 012345678 9 40 26109 25400 2471 2 24045 23399 22771 22163 21 573 21000 20445 50 19906 19383 1887 6 18383 17905 17440 16990 16 553 16128 15715 60 15314 14925 1454 8 14180 13823 13477 13140 12 812 .
Refer to ignition mo dule illustration, Is there 120VAC between P1(1) and P1(3) ? Refer to ignition mo dule illustration, Is there 22 - 27VAC between P2(1) and P2(2) ? Refer to ignition mo dule illustration, Is there 120VAC between P7(3) and P7(1) ? Replace transformer.
WIRING DIAGRAM For models prior to CF serial number Step 5. Carefully d isconnect all wires from the rmostat board. Note: it may be necessary to identify wires for proper re-connection. Step 6. Remove the two screws (Ph illips head screw driver) that secure thermostat board to control panel.
Thermostat Potentiometer Replacement Procedure Step 4. Loosen set scre w of adjusting knob (small blade screw driver) and remove adju sting knob from potentiometer. (see photos at right) Step 5. Remove retain ing nut (½" wrench) and washer from potentiometer.
Thermostat Sensor (Thermister) Replacement Procedure Step 5. Fold back insu lation just in front of burner to expose temperature se nsor (see photo below). Step 6. Disconne ct temperature sensor from harness (see photos at right). Step 7. Hot Surface Ig nition Models: Remove temperature sensor (1-1/16" hex, deep well socket) from heater.
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 1" NPT for EF100T399, all others use ¾" NPT.
Refer to ignition module illustration below, is there 24VAC between P3(2) and P3(5) (blue and brown wires) during the flame establishing period? (Note: Valve LED must be lit during this check) Y Replace ignition module. (see “Ignition Module Replacement Procedure”) N Replace Rectifier harness and /or gas valve.
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 Verify Minimum Gas Supply Piping Requirements of: Minimum ¾" NPT. (Schedule 40 black Iron Pipe recommended).
Refer to control board illustration, is there 24VAC between P5(5) and P5(8) (blue and brown wires) during the flame establishing period? (Note: Control Display m ust show “Heating” for operating status) Y Replace Control Board N Replace Rectifier harness and/or gas valve.
Step 1. Position main power switch to “OFF”. Step 2. Disconne ct (unplug) water heater from 120 volt power source. Step 3. Turn o ff gas supply to water heater. Step 4. Un-latch and remove surrou nd cover from top of heater. Step 5. F rom the gas valve, disconnect the gas connection, PVC venting, Silicone tubing and wire harness.
Combustion System Replacement Procedure Step 1. Fully inspe ct burner mounting insert gasket for the fo llowing: a ) Tears d) Dirt or debr is b) Missing material e) Other imperfections that would inhibit proper seal c ) Cracks If gasket is NOT affected by any of the above, gasket replacement is not required.
Step 1. Position main power switch to “OFF”. Step 2. Disconne ct (unplug) water heater from 120 volt power source. Step 3. Turn o ff gas supply to water heater. Step 4. Un-latch & remove surroun d cover from top of heater. Step 5. From the g as valve, disconnect the gas connection, PVC venting, wire harness and silicone tubing.
Burner Tube Inspection S tep 1. Inspect burne r tube as follows (BSI ceramic fiber mesh burner, water hea ters prior to serial number “CK”) : a) Visually inspect ceramic fiber mesh, mesh should be u niform in appearance without large gaps, tears or fraying.
Gas Valve Replacement Procedure Step 6. Remo ve the 2 gas valve mou nting screws (Torx bit) located at the 11:00 O-clock & 5:00 O-clock position on the venturi mounting flange and remove gas valve from wate r heater. Step 7. Remove any residual gasket ma terial from blower and venturi mounting flange.
Hot Surface Ignition Models: Are safety circuits in normal position? Direct Spark Ignition Models: Is collector high limit switch and pressure switch in normally closed position? D oes blower energize.
Blower Replacement Procedure Step 5. Disconnect wire harness from blower. Step 6. Disconne ct intake vent and gas supply from gas valve assembly. Step 7. Remo ve the 2 gas valve mou nting screws (Torx bit) located at the 11:00 O-clock & 5:00 O-clock position on the venturi mounting flange.
Does blower energize? N Y Sequence of operation: With the thermostat calling for heat, prior to energizing blower, the ignition module checks the exhaust pressure switch for norma l switch position of normally open.
Inspect the area housing the combustion system and control panel located at the top of the heater. Does the area show sign s of corrosion and/or exssesive heat? Y N Call for technical support Remove c.
Exhaust Pressure Switch Replacement Procedure Step 1. Position main power switch to “OFF” position. Step 2. Loosen a dhesive backed rubber escutcheon from service pane l access cover and slide escutcheon back along exhau st pipe to allow for removal of cover.
Reset button Does blower energize? N Sequence of operation: The blocked vent pressure switch monitors the pressure in the exhaust tube. The switch contacts are normally closed and will not open unless there is a blockage in the exhaust venting or terminal (snow, ice, debris).
Check Exhaust Tube Pressure Blocked Vent Pressure Switch Testing and Replacement for serial number “CF” and later Exhaust Tube pressure tap location Exhaust tube at bottom of heater N Replace blocked vent switch.
Exhaust Pressure Switch Replacement Procedure S tep 1. Position main power switch to “OFF” positio n. S tep 2. Loosen adhesive backed rubber escutcheon from service pan el access cover and slide escutcheon back along exha ust pipe to allow for remova l of cover.
Is igniter resistance less than 150 Ohms (cold)? (see “check igniter resistance” below) Refer to ignition module illustration below, is there 120VAC across terminals P6(1) and P6(2) ? (Check during igniter warm up period, indicated by the igniter LED glowing on the ignition module).
Hot surface Igniter Replacement Procedure Step 1. Position main power switch to “OFF” Step 2. Disconnect (unplug) water he ater from 120 volt power source. Step 3. Un-latch & remove surround cover from top of heater. Step 4. Fold back insulation in front of combustion assembly to expose hot surface ign iter.
With flame sensor Disconnected from ignition module, check continuity to ground. Is there continuity to ground? N Y Flame Sensor Testing Procedure Refer to illustration below, is there a minimum of 1 micro amp during 1.5 second flame proving perio d? Y N Is flame sensor free of oxidation? Clean or replace flame sensor.
Flame Sensor Replacement Procedure Step 4. Fold back insulation in front of combustion assembly to expose flame sensor. (see photo at right) Step 5. Disconnect wire lead from flame sensor. Step 6. Remove the 2 sensor mounting screws (magnetic tip, long reach Phillips screw driver) and remove flame sensor & gasket from transition base flange.
64 Spark Rod Gap Inspection and Adjustment Step 1. Remove combustion system as described in “ Combustion System Removal Procedure”. Step 2. Measure spark gap between the spark rod and burner tube. Accepta ble spark gap is between 3/16" - 1/4" (see photo below).
65 Spark Rod Replacement Procedure Step 4. Fold back insulation in front of combustion assembly to expose spark rod. (see photo at right) Step 5. Disconnect wire lead from spark rod. Step 6. Remove the 2 mounting screw s (magnetic tip, long reach Phillips screw driver) and remove spark rod & gasket from transition base flange.
Ignition Module Replacement Procedure Step 1. Position main power switch to “OFF”. Step 2. Disconnect (Unplug) water heater from 120 Volt power source. Step 3. Un-latch & remove surround cover from top of water heater. Step 4. Locate Ignition module on control panel inside surround area.
Control Board Replacement (Honeywell Integrated Control w/ Direct Spark Ignition) Step 1. Position main power switch to “OFF” Step 2. Disconnect (unplug) water heater from 120 volt power source. Step 3. Un-latch and remove top surround cover from top of water heater.
Transformer Replacement Procedure Step 4. For Hot Surface Ignition models , refer to ignition module illustration below, Disconnect wire harness P1 labeled “PRIMARY” and P2 labeled “SECONDARY” from ignition module. Step 5. For Hot Surface Ignition models , Disconnect secondary leads (blue & yellow wire) from thermostat board.
Is there continuity through the normally closed intake pressure switch? (see photo at right) Y Replace intake pressure switch. (see “Intake Pressure Switch Replacement Procedure”) Switch OK. Does Blower Energize? Does purge LED illuminate on the ignition module? Remove hose from intake pressure switch and Restart heater.
Intake Pressure Switch Replacement Procedure Step 1. Position main power switch to “OFF”. Step 2. Disconnect (Unplug) water heater from 120 Volt power source. Step 3. Un-latch & remove surround cover from top of water heater. Step 4. Locate intake pressure switch on control panel inside surround a rea (see photos below).
Reset heater, observe heating cycle. Does switch open? Y Does switch open prior to 350°F? DO NOT OPERATE HEATER System over heating, immediately contact technical support.
Vent Safety Switch Replacement Procedure Step 1. Position main power switch to “OFF”. Step 2. Loosen adhesive backed rubber escutcheon from service p anel access cover and slide escutcheon back along exhau st pipe to allow for removal of cover (see photos at right).
Disassembly Procedure for Access to Anodes & Flue Baffles Step 1. Position main power switch to “OFF”. Step 2. Disconnect (Unplug) water heater from 120 Volt power source. Step 3. Un-latch & remove surround cover from top of heater. Step 4.
Anode inspection and replacement Step 1. Turn off water supply and d rain water heater. Step 2. Disassemble water heater per “Disassembly Procedure for Access to Andoes & Flue Baffles”. Step 3. Locate and remove anode rods from heater (1-1/16 hex socket).
Flue baffle inspection and replacement Step 1. Disassemble heater per “Disassembly Procedure for Access to Anodes & Flue Baffles”. Step 2. Remove flue baffles from heater (pliers) (8 two inch baffles & 2 four inch baffles). Step 3. Visually inspect flue baffles.
Powered Anode Replacement EF100T399 models only Powered Anode Replacement for EF100T399 only The powered anode control module is loca ted on the right vertical side of the contro l panel inside the surround panel. The control has a LED indicator light to show the status of operation.
Collector Cover Installation Procedure Step 1. Remove old silicone from top surface of collecto r flange and collector cover. Step 2. Apply ¼" bead of Ultra Copper Silicone around entire collecto r flange surface. Allow caulk to “cure” for 10 minutes.
Product Handling - Carefully uncrate the heater. Move in place with a hand truck (Do not use the venting pipes for handles). Electrical Requirements - Make sure there is 120 volts line voltage. Line voltage must be properly polarized. Adequate ground supplied to the heater.
R 79 Date Model Number Serial Number Venting (PVC, CPVC): Intake 90's (qty) Vent size 3" or 4" Exhaust 90's (qty) Length of straight pipe (intak e) Intake 45's (qty) Exhaust 4.
Models prior to “CF” serial number 80 C Customer must specify complete model number and serial number when ordering service parts. 1 Combustion Surround Assy.
Customer must specify complete model number and serial number when ordering service parts. 81 Models prior to “CF” serial number AA Latch Assy BB Screw 8-32 x ½ RHCR CC Ignition Control Assy DD Jacket Head EE Main Power Switch FF Potentiometer GG Combustion Surround JJ Surround Base 1A Combustion Surround Assy.
Customer must specify complete model number and serial number when ordering service parts. 82 Models prior to “CF” serial number 1C Electronic Control Module 2C Screw 8-32 x 1/2 3C Intake Pressure.
For models with “CF” serial or later. Customer must specify complete model number and serial number when ordering service parts. 83 1 Combustion Surround Assy.
For models with “CF” serial or later. Customer must specify complete model number and serial number when ordering service parts. 84 AA Latch Assy BB Screw 8-32 x ½ RHCR CC Ignition Control Assy DD Jacket Head EE Main Power Switch FF Potentiometer GG Combustion Surround JJ Surround Base 1A Combustion Surround Assy.
For models with “CF” serial or later. Customer must specify complete model number and serial number when ordering service parts. 85 Electronic Control Module Screw 8-32 x 1/2 Control Mounti ng Pan.
For models with Direct Spark Ignition Customer must specify complete model number and serial number when ordering service parts. 1 Combustion Surround Assembly 2 Burner Assembly (specify model) 3 2 nd.
For models with Direct Spark Ignition Customer must specify complete model number and serial number when ordering service parts. 1A Combustion Surround Assembly (specify model) 2A Blower Gas Valve Assy.
For models with Direct Spark Ignition Customer must specify complete model number and serial number when ordering service parts. 88 1C Control Panel 2C Control Board 3C 4C Transformer 120VAC x 24VAC x.
NOTES AC Alternating Current BTU/H British Thermal Units CO Carbon Monoxide CO2 Carbon Dioxide DC Direct Current DSI Direct Spark Ignition ECO Energy Cut Off GFI Ground fault interrupt GPM Gallons per.
NOTES 90 90.
NOTES 91 91.
Email parts@bradfordwhite.com techserv@bradfordwhite.com www .bradfordwhite.com.
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Se non hai ancora comprato il Bradford-White Corp EF100T250(E)*(N è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del Bradford-White Corp EF100T250(E)*(N - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Bradford-White Corp EF100T250(E)*(N imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Bradford-White Corp EF100T250(E)*(N ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Bradford-White Corp EF100T250(E)*(N, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del Bradford-White Corp EF100T250(E)*(N.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Bradford-White Corp EF100T250(E)*(N. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Bradford-White Corp EF100T250(E)*(N insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
