Bradford White EF Series Installation & Operating Manual
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Bradford White EF Series Installation & Operating Manual

Ef series ultra high efficiency commercial gas water heater
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ULTRA HIGH EFFICIENCY COMMERCIAL GAS WATER
Ambler, PA 19002
Tech. Service (800) 334-3393
Service Parts (800) 538-2020
Warranty Service (800) 531-2111
INSTALLATION/OPERATING MANUAL
PLACE THESE INSTRUCTIONS ADJACENT TO WATER HEATER AND NOTIFY OWNER TO KEEP FOR FUTURE REFERENCE
HEATER
(EF™ Series Models)
WITH TROUBLESHOOTING GUIDE
WARNING: If the information in
these instructions is not followed
exactly, a fire or explosion may result
causing property damage, personal
injury or death.
-
Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.
- WHAT TO DO IF YOU SMELL GAS
Do not try to light any appliance.
Do not touch any electrical switch; do
not use any phone in your building.
Immediately call your gas supplier
from a neighbor's phone. Follow the
gas supplier's instructions.
If you cannot reach your gas
supplier, call the fire department.
-
For your family's comfort, safety and
convenience, it is recommended this
water heater be installed and serviced by
a plumbing professional.
238-48384-00F REV 7/12

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  • Page 1 ULTRA HIGH EFFICIENCY COMMERCIAL GAS WATER HEATER (EF™ Series Models) WARNING: If the information in these instructions is not followed exactly, a fire or explosion may result causing property damage, personal injury or death. Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.

  • Page 2: Table Of Contents

    SECTION I: IMPORTANT INFORMATION READ CAREFULLY This gas-fired water heater is design certified by CSA International under the American National Standard, Z21.10.3 (as indicated on the rating plate) and CAN/CGA 4.3-M (as indicated on the rating plate) available from CSA Standards Association, 5060 Spectrum Way, Mississauga, Ontario, CANADA L4W 5N6.
  • Page 3 DANGER DO NOT store or use gasoline or other flammable, combustible, or corrosive vapors and/or liquids in the vicinity of this or any other appliance. DO NOT install any damaged venting system components. If damage is evident then please contact the supplier where the water heater was purchased or the manufacturer listed on the rating plate for replacement parts.
  • Page 4 WARNING This water heater needs fresh air for safe operation and must be installed so there are provisions for adequate combustion and ventilation air. Insufficient air supply will cause a recirculation of combustion products resulting in contamination that may be hazardous to life. This will result in carboning or sooting of the combustion chamber, burners, and flue tubes and creates a risk of asphyxiation.
  • Page 5 SECTION II: SPECIFICATIONS Figure 1. Dimensional Layout Recovery GPH DIMENSIONS ( INCHES ) At Degree Rise Stg. Front Space Input Del. Therm. Flr to Flr to Fl. to Relief Shpg. Cap. Flr to Fl. to Wtr. Heating Model No. Rate Gal.
  • Page 6 SECTION III: GENERAL INFORMATION FEATURES This water heater contains the following features: MAIN POWER ON/OFF SWITCH – The front panel of this water heater has a lighted ON/OFF switch, which is illuminated when the main power is turned on to indicate power to the water heater. COMBUSTION SYSTEM –...
  • Page 7 TEMPERATURE AND PRESSURE RELIEF VALVE – WARNING Keep clear of the combination temperature and pressure relief valve discharge line outlet. The discharge may be hot enough to cause scald injury. The water is under pressure and may splash. For protection against excessive temperatures and pressure, install temperature and pressure protective equipment required by local codes, but not less than a combination temperature and pressure relief valve certified by a nationally recognized testing laboratory that maintains periodic inspection of production of listed equipment or materials as meeting the requirements of the Standard for Relief Valves and Automatic Gas Shutoff Devices for Hot Water Supply...

  • Page 8: Dishwashing Machine Requirements

    Figure 2. Condensate Elbow With Trap CLEANOUT – All models are equipped with a cleanout opening to aid in removal of hard water deposits from the tank bottom. If this water heater operates under hard water conditions, the following should be performed at least every 3 months: Turn off water supply and drain the water heater.
  • Page 9 SECTION IV: INSTALLATION INSTRUCTIONS WARNING INSTALLATION OF THIS WATER HEATER REQUIRES ABILITY EQUIVALENT TO THAT OF A LICENSED TRADESMAN IN THE FIELD INVOLVED. PLUMBING, AIR SUPPLY, VENTING, GAS SUPPLY AND ELECTRICAL WORK ARE REQUIRED DO NOT ATTEMPT TO LIGHT ANY GAS APPLIANCE IF YOU ARE NOT CERTAIN OF THE FOLLOWING: ...
  • Page 10 UNPACKING INSPECT SHIPMENT carefully for any signs of damage. All equipment is carefully manufactured, inspected and packed. Any claims for damage or shortage in shipment must be filed immediately with the shipper, and noted on the Bill of Lading. Remove all venting components from the combustion assembly compartment by removing the latches. NOTICE The vent terminals and the condensate elbow that is supplied with this water heater are stored at the top in the Combustion Assembly Compartment.
  • Page 11 Figure 3b. Recommended Minimum Clearances For Service Access REMOVE CRATE 1. Remove all banding and pry off crate sides carefully so as not to damage the water heater. 2. Carefully roll/lift the water heater from the crate base. CAUTION Do not drop water heater. Do not bump water heater jacket against floor. Do not bump exhaust vent pipe against crate or other objects.
  • Page 12 CAUTION If the building cold water supply has a back-flow preventer, check valve or water meter with check valve, provisions for thermal expansion of water in the hot water system must be provided. LOCATION KEEP APPLIANCE AREA CLEAR AND FREE OF COMBUSTIBLE MATERIALS, GASOLINE AND OTHER FLAMMABLE VAPORS AND LIQUIDS.
  • Page 13 CHEMICAL VAPOR CORROSION Corrosion of the flue ways and vent system will occur if air for combustion contains certain chemical vapors. Such corrosion may result in poor combustion and create a risk of asphyxiation, as well as reducing the life of the water heater. Spray can propellants, cleaning solvents, refrigerator and air conditioning refrigerants, swimming pool chemicals, calcium and sodium chloride, waxes and process chemicals are corrosive.
  • Page 14 Figure 7. Typical Three Water Heater Connection Figure 8. Typical Four Water Heater Connection...

  • Page 15: V Water Connections

    SECTION V: WATER CONNECTIONS WARNING Failure to install and maintain a new, listed temperature and pressure relief valve will release the manufacturer from any claim, which might result from excessive temperature and pressures. Hydrogen gas can be produced in an operating water heater that has not had water drawn from the tank for a long period of time (generally two weeks or more).
  • Page 16 Approximate Time/Temperature Scald Chart APPROXIMATE TIME/TEMPERATURE RELATIONSHIPS IN SCALDS 120°F (49°C) More than 5 minutes 125°F (52°C) 1½ to 2 minutes 130°F (54°C) About 30 seconds 135°F (57°C) About 10 seconds 140°F (60°C) Less than 5 seconds 145°F (63°C) Less than 3 seconds 150°F (66°C) About 1½...
  • Page 17 Figure 10. Typical Plumbing Schematic for Zoned Heating SECTION VI: VENTING WARNING The vent system must be properly installed. Failure to properly install the vent system could result in property damage, personal injury, or death. DO NOT install damaged venting system components. If damage is evident then please contact the supplier where the water heater was purchased or the manufacturer listed on the rating plate for replacement parts.
  • Page 18 NOTICE Single Wall Polypropylene venting systems that are listed on the Bradford White website are approved for use in the water heaters covered in this instruction manual. The venting system components are ULC S636 approved and listed by a recognized agency and may be installed in the U.S. and Canada. Complete instructions for the approved venting systems can be found on the Bradford White website, bradfordwhite.com or by calling the Technical Service Department at:800-334-3393.
  • Page 19 CAUTION Check to make sure flue gases do not recirculate into the air intake terminal when using direct venting. If the water heater is having service issues, flue recirculation may be a contributing factor. Even when the minimum vent terminal separation distances are followed, recirculation may still occur depending upon the location outside the building, the distance from other buildings, proximity to corners, weather conditions, wind patterns, and snow depth.
  • Page 20 NOTICE The air intake and exhaust terminals may be located on separate outside walls or one terminal may exit the roof while the other is through the wall. The total combined equivalent vent length must be within the limits specified in the venting tables and the intake length cannot exceed the exhaust by more than 30 feet.
  • Page 21 Figure 11a. Vent Terminal Clearances (Other than Direct Vent or “Power Vented” Installations) Canadian US Installations Canadian US Installations Installations Installations Clearance above 12 inches 12 inches Clearance to each side 3 feet (91 cm) within a grade, veranda, (30 cm) (30 cm) of center line extended height 15 feet (4.6 m)
  • Page 22 Figure 11b. Direct Vent Terminal Clearances Canadian Canadian US Installations Installations Installations Installations Clearance above grade, 12 inches 12 inches Clearance to each side 3 feet (91 cm) within a veranda, porch, deck or (30 cm) (30 cm) of center line extended height 15 feet (4.6 m) balcony above meter/regulator...
  • Page 23 The vent system must terminate so that proper clearances are maintained as cited in local codes or the latest edition of the National Fuel Gas Code, ANSI Z223.1.73.4e and 7.8a, b as follows: 1. Do not terminate near soffit vents or crawl space or other area where condensate or vapor could create a nuisance or hazard or cause property damage.
  • Page 24 WARNING! DO NOT USE 2” VENT WITH EF100T250/300 MODELS Figure 12. Typical Horizontal Direct Vent System Vertical Installation: Vertical venting system must be supported every 5 feet of vertical run and every 3 feet of horizontal run of vent pipe length.
  • Page 25 WARNING! DO NOT USE 2” VENT WITH EF100T250/300 MODELS Figure 13. Typical Vertical Direct Vent System Installation (Note: Intake and exhaust terminals may be on different outside walls.) Through The Wall Venting With Low Ground Clearance: When venting cannot exit through the wall at a height greater than or equal to 12” (30.5 cm) (and above expected snow level) from the ground, then the installation must be modified as shown below (see Figure 14).
  • Page 26 WARNING! DO NOT USE 2” VENT WITH EF100T250/300 MODELS Figure 14. Vent Terminal (Low Ground Clearance) Maximum Vent Length: Direct Vent Maximum Vent Length (Combined Maximum Length for Intake and Exhaust) Max Vent Max Vent Max Vent Model Number Length (feet) 2” Length (feet) 3"...
  • Page 27 POWER VENT INSTALLATION Power venting is where the indoor air is used and the exhaust is vented to the outside. Venting may be run horizontally through an outside wall or vertically through a roof through using either 2 inch (5.1 cm), 3 inch (7.6 cm) or 4 inch (10.2 cm) diameter pipe.
  • Page 28 Vertical Installation: Vertical venting must be supported every 5 feet of vertical run and every 3 feet of horizontal run of vent pipe length. Stress levels in the pipe and fittings can be significantly increased by improper installation. If rigid pipe clamps are used to hold the pipe in place, or if the pipe cannot move freely through a wall penetration, the pipe may be directly stressed, or high thermal stresses may be formed when the pipe heats up and expands.
  • Page 29 WARNING! DO NOT USE 2” VENT WITH EF100T250/300 MODELS Figure 17. Vent Terminal (Low Ground Clearance) Maximum Vent Length Determination Power Vent Maximum Vent Length Model Max Vent Max Vent Max Vent Length Number Length (feet) 2” Length (feet) 3" (feet) 4"...
  • Page 30 MULTIPLE INTAKE/EXHAUST TERMINAL SEPARATION DISTANCES Figure 18 Note: When installing multiple intake/exhaust terminals on the same wall of a building, the nearest intake terminal must be at least 5 feet from the nearest exhaust terminal.
  • Page 31 CONCENTRIC VENT TERMINAL INSTALLATION PROCEDURE WARNING Improper installation, adjustment, service, or maintenance can cause property damage, personal injury, or death. Consult a qualified installer, service agency, or the gas supplier for information or assistance. This kit must be used only for terminating this water heater. Do not use this termination kit for any other appliance. Using this kit on other appliances and/or water heaters can result in property damage, personal injury, or death.
  • Page 32 2. Determine the best location for the termination kit. 3. Cut the recommended 5” (12.7 cm) diameter hole (for 3” vent termination) or 4 inch (10.2 cm) for 2” vent termination kit. 4. Partially assemble vent kit by performing the following: a.
  • Page 33 Operate heater through one cycle to ensure combustion-air and vent pipes are properly connected and sealed to concentric vent termination connections. Horizontal Installation: Become familiar with coaxial vent kit part no. 239-44069-01, as shown in Figures 19 through 21. For venting 4 inch (10.2 cm) or 2 inch (5.1 cm) diameter pipe, use the appropriate bell reducer to reduce to the 3 inch (7.6 cm) diameter vent size to connect to the 3 inch (7.6 cm) vent terminal connections.
  • Page 34 It is acceptable to install a 90 degree elbow on IPEX concentric vent terminations use with this power direct vent water heater (see Figure 23b). A short length of appropriate diameter vent pipe should be used to transition from the vent terminal to the 90 degree elbow. Approved venting materials along with primers and cements are listed at the beginning of this venting section.
  • Page 35 INITIAL PREPARATION Make sure the solvent cement you are planning to use is designed for the specific application you are attempting. Know the physical and chemical characteristics and limitations of the PVC, PVC cellular core, ABS or CPVC piping materials that you are about to use. Know the reputation of your pipe and cement manufacturer and their products.

  • Page 36: Vii Gas Connections

    SECTION VII: GAS CONNECTIONS WARNING Connect this water heater only to the type of gas as shown on the rating plate. Use clean black iron pipe or equivalent material approved by local codes and ordinances. (Dirt and scale from the pipe can enter the gas valve and cause it to malfunction).
  • Page 37 GAS METER SIZE – NATURAL GASES ONLY Be sure that the gas meter has sufficient capacity to supply the full rated gas input of the water heater as well as the requirements of all other gas fired equipment supplied by the meter. If the gas meter is too small, ask the gas company to install a larger meter having adequate capacity.

  • Page 38: Electrical Connections

    SECTION VIII: ELECTRICAL CONNECTIONS WARNING Turn off or disconnect the electrical power supply to the water heater before servicing. Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing. All electrical wiring must be installed and grounded in accordance with local codes, or in the absence of local codes, the National Electrical Code, ANSI/NFPA 70 and/or CSA C22.2 Electrical Code.

  • Page 39: Operating Instructions

    SECTION IX: OPERATING INSTRUCTIONS WARNING Water heaters are heat-producing appliances. To avoid damage or injury there must be no materials stored against the water heater or direct vent system, and proper care must be taken to avoid unnecessary contact (especially by children) with the water heater and direct vent system.
  • Page 40 LIGHTING AND SHUT-DOWN INSTRUCTIONS FOR YOUR SAFETY READ BEFORE LIGHTING WARNING: If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life. A. This appliance does not have a pilot. Immediately call your gas supplier It is equipped with an ignition device from a neighbor's phone.
  • Page 41 TEMPERATURE ADJUSTMENT APPROXIMATE TIME/TEMPERATURE RELATIONSHIPS IN SCALDS 120°F (49°C) More than 5 minutes 125°F (52°C) 1½ to 2 minutes 130°F (54°C) About 30 seconds 135°F (57°C) About 10 seconds 140°F (60°C) Less than 5 seconds 145°F (63°C) Less than 3 seconds 150°F (66°C) About 1½...
  • Page 42 WARNING If the water heater display does not show “Operational” in the “Status” indicator, there may be an operating malfunction with the water heater. If this is the case, a numeric code will be displayed. Refer to the label next to the display for the definition of the error code and call your plumbing professional or service agent to service the water heater.
  • Page 43 To Increase Setpoint Temperature Step 1: Depress and hold “Temperature Up” button until desired setpoint temperature appears in the display.  °F idle Status Operational SELECT Step 1 Step 2: “Setpoint” indicator begins flashing in the display after pressing “Temperature Up” button. "Setpoint"...
  • Page 44 To Decrease Setpoint Temperature Step 1: Depress and hold “Temperature Down” button until desired setpoint temperature appears in the display. °F  idle Operational Status SELECT Step 1 Step 2: “Setpoint” indicator begins flashing in the display after pressing “Temperature Down” button. "Setpoint"...
  • Page 45 To Change Temperature Format in Display from F to C or ˚C to ˚F: Step 1: Press “SELECT” button until F/C is displayed. °F °F/°C idle Operational Status  SELECT Step 1 P ress select Step 2: Press “SET” button to change temperature format. Symbol F/C will flash. °F °F/°C idle...
  • Page 46 Step 3b: Press “Temperature Down” button to change temperature format to F. Changes to "°F" °F/°C Flashes °F °F/°C idle Operational Status SELECT Step 4: Press “SET” button to confirm ˚F or ˚C format. F/C will stop flashing. Setpoint display will appear in the format selected (˚F or ˚C) in 10 seconds.
  • Page 47 An automatic gas shut-off device (ECO) is incorporated in the sensor and control board which will shut off all gas supply to the burner if the water heater temperature exceeds 200°F (93°C). Should the ECO function (open), the water temperature should be reduced to approximately 120°F (49°C) and call a qualified service agent to place the water heater in operation.

  • Page 48: Maintenance

    SECTION X: MAINTENANCE DANGER DO NOT ATTEMPT TO REPAIR GAS VALVE. DO NOT ATTEMPT TO REPAIR IGNITION MODULE. DO NOT ATTEMPT TO REPAIR VENTURI. DO NOT ATTEMPT TO REPAIR THERMOSTAT BOARD. DO NOT ATTEMPT TO REPAIR TRANSFORMER. DO NOT ATTEMPT TO REPAIR PRESSURE SWITCH. GENERAL KEEP APPLIANCE AREA CLEAR AND FREE FROM COMBUSTIBLE MATERIALS, GASOLINE AND OTHER FLAMMABLE VAPORS AND LIQUIDS.
  • Page 49 MAINTENANCE SCHEDULE Following are the instructions for performing some of the recommended maintenance. Unit inspection and adjustment should be performed by a competent technician. Suggested Maintenance Schedule COMPONENT OPERATION INTERVAL REQUIRED Tank Sediment Removal Monthly Flushing Anode Rods Inspect Semi-Annually Replace as Required Relief Valve Check Operation...
  • Page 50 The usage of water softening equipment greatly reduces the hardness of the water. However, this equipment does not always remove all of the hardness (lime). For this reason it is recommended that a regular schedule of deliming be maintained. The depth of the buildup should be measured periodically. Water heaters will have about 3 inches of lime buildup when the level of lime has reached the bottom of the cleanout opening or about 1 inch of lime buildup if it has reached the drain valve opening.
  • Page 51 DRAIN VALVE AND TANK ACCESS PANEL The water heaters are equipped with a ¾ inch drain valve. An access panel covers the cleanout opening in the tank, which is sealed by a gasket and cover. RELIEF VALVE At least twice a year, the temperature and pressure relief valve should be checked to ensure that it is in operating condition.

  • Page 52: Guide

    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.
  • Page 53 Step 1: Press “Select” and “Temperature Up” buttons together and hold for 3 seconds until “Max Setpoint” is shown in the display. "Max Setpoint" next to Temperature Setpoint value.  °F Setpoint idle Operational Status SELECT NOTICE 12.5 minutes after the last button press, the display will automatically return to the “User Mode”. Simultaneously pressing the “Select”...
  • Page 54 1. Max Setpoint (Display/Change) Max Setpoint value in Water Heater Display °F Setpoint idle Operational Status SELECT 2. Water Temperature Sensor Reading. Water Temp °F idle Operational Status  SELECT 3. Flame Current of Pilot Flame Sensor (Displays only in the Heating Cycle) µA Heating Flame Current...
  • Page 55 Setpoint (Display/Change) setpoint °F idle Operational Status  SELECT 5. ˚F/˚C (Display/Change) °F °F/C° idle Operational Status  SELECT 6. Differential (Display only – shows the differential of the thermostat) Differential °F idle Operational Status  SELECT...
  • Page 56 7. Software Version (Display only) Soft idle Operational Status SELECT 8. Error Code History (Displays if there are present error codes or up to 10 previous error codes). Water Heater Display will show -- if there are no error codes. No current error codes idle Operational...
  • Page 57 To change the Maximum Setpoint Limit (Max Setpoint) for the temperature setpoint: WARNING Setting the water temperature to the maximum set point can result in scalding hot water delivered to the faucets. It is highly recommended that the maximum setpoint be adjusted to the lowest temperature possible for the needs of the installation.
  • Page 58 Step 3: Press the “UP” or “DOWN” buttons to change the maximum setpoint value. This will limit the maximum setpoint the user can select. Note: The maximum setpoint is approximately 180˚F (82˚C). flash "Max Setpoint" continues to while making adjustments °F Setpoint ...
  • Page 59 Display of Water Temperature: Step 1: In Service Mode, Press the “Select” button until “Water Temp” is displayed in the upper right section of the water heater display. This is the reading for the tank sensor. Water °F Temp idle Status Operational ...
  • Page 60 To Display and Change Temperature Setpoint: Step 1: In “Service Mode” press the “Select” button until “Setpoint” is shown in the water heater display. setpoint °F idle Operational Status  SELECT Step 2: Press the “Set” button to enter the setting mode. “Setpoint” will flash in the water heater display. "Setpoint"...
  • Page 61 Step 4: To lower the temperature setpoint, press the “Temperature Down” button until the desired temperature is shown on the water heater display. "Setpoint" Flashes setpoint °F  idle Operational Status SELECT Step 5: When the desired setpoint is reached on the water heater display, press the “Set” button to confirm the new setpoint.
  • Page 62 Step 2: Press “Set” button to change temperature format. “˚F/˚C” symbol will flash in the water heater display. "°F/°C" Flashes °F °F/C° idle Operational Status  SELECT Step 3a: Press “Temperature Up” button to change temperature format to ˚C. Changes to "°C" "°F/°C"...
  • Page 63 Step 4: Press “Set” button to confirm ˚F or ˚C format. ˚F/˚C will stop flashing. "°F/°C" Symbol Stops Flashing °F °F °F/C° idle Operational Status  SELECT Step 5: Pressing “Select” button will return display to setpoint in format selected (˚F or ˚C) immediately. Setpoint shown in °F °F idle...
  • Page 64 How to reset the control from Lockout Conditions: WARNING The following procedure is for service and installation personnel only. Resetting lockout conditions without correcting the malfunction can result in a hazardous condition. If an error code is displayed (except for #4, low flame sense current), the water heater will be in a “lockout condition” with the water heater display showing the error code number and “Service Needed”...
  • Page 65 Error Codes and Error History Display: If there is an operating problem with the water heater, an error code number will appear on the water heater display with “Service Needed” to the right of the “Status” indicator. The error code label is located below the water heater display and the following section in this Installation and Operating Instruction Manual explains the error codes with corrective actions to repair the water heater.
  • Page 66 Step 2: Press the “Temperature Down” button to select the error code index, starting with the most recent error code “10”. Error Code Index  idle Status Operational SELECT Step 3: Press the “Select” button to view the error code for “code 10”. If there is a number displayed, note what the number is.
  • Page 67 Step 5: Press the “Select” button for code index #9 to view if there are any code numbers. Stored Error Code For Code Index #9 idle Operational Status  SELECT Step 6: Continue pressing the “Temperature Down” button to change to the next error code index and press “Select”...
  • Page 68 DIAGNOSTIC ERROR CODES AND TROUBLESHOOTING PROCEDURES FOR EF MODELS WITH HONEYWELL INTEGRATED DIRECT SPARK IGNITON CONTROL SYSTEM Error Definition of Code Cause of Problem and Actions Taken to Correct Code Check power supply to the water heater. Make sure water heater is plugged in and the breaker is on.
  • Page 69 Error Definition of Code Cause of Problem and Actions Taken to Correct Code Burner is either not lighting or not staying lit during ignition cycle. Check inlet gas pressure for minimum pressure on rating label. Can you hear sparking to the burner? Check high voltage cable connections.
  • Page 70 Procedure for Checking Thermostat Sensors Set the thermostat above water temperature (See temperature adjustment section) and observe system through one (1) complete cycle. Make sure system operates as desired. To check the sensor assembly, compare the resistance of the sensor wires (either outside black to center wire with yellow marking) as measured by an ohmmeter to the water temperature as measured by an accurate thermometer.

  • Page 71: Parts List

    SECTION XII: PARTS LIST EF™ – Series Water Heater 1 Combustion Surround Assembly 2 Burner Assembly (Specify model) 3 2nd Pass Top Collector Cover 4 Screw 10-16 x 3/4" 5 Vent Termination Elbow 6 Thermostat Sensor Probe 7 Baffle 4” Flue (Specify Model) 8 Mag.
  • Page 72 Combustion Surround Assembly AA Keeper Latch & Catch BB Screw 8-32 x 1/2" RHCR CC Control Panel Assembly DD Jacket Head 28 1/4“ Grey EE Switch Main Power FF Control Display GG Combustion Surround JJ Surround Bas/Jacket Head KK Display Harness...
  • Page 73 2 Combustion Ass'y (pictured previous page) 1A Combustion Ass’y (Specify model) 14A Inlet Pipe Blower/Gas Valve Ass’y Gasket Blower Transition (Specify model) (Specify model) 3A Burner Ass’y (Specify model) 16A Screw 8 -32 x 1/4" RHCR 4A Blower – EBM (Specify model) 17A Gasket Flame Sensor 5A Silicone Hose 18A Flame Sensor...
  • Page 74 NOTES...
  • Page 75 NOTES...
  • Page 76 NOTES...

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