Bradford White UCG100H199 Installation & Operation Manual
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Bradford White UCG100H199 Installation & Operation Manual

Gas-fired commercial water heater
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GAS-FIRED COMMERCIAL WATER HEATER
INSTALLATION/OPERATION MANUAL
PLACE THESE INSTRUCTIONS ADJACENT TO WATER HEATER AND NOTIFY OWNER TO KEEP FOR FUTURE REFERENCE
(Ultra Low NOx)
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.
Ambler, PA 19002
Tech Service (800) 334-3393
Service Parts (800) 538-2020
Warranty Service (800) 531-2111
238-50463-00C REV 12/14

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  • Page 1 GAS-FIRED COMMERCIAL WATER HEATER (Ultra Low NOx) 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. This water heater is equipped with an adjustable thermostat to control water temperature. Hot water temperatures required for automatic dishwasher and laundry use can cause scald burns resulting in serious personal injury and/or death.
  • 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, burner, and flue tubes and creates a risk of asphyxiation.

  • Page 5: Section Ii: Specifications

    (in.) Water (in) Conn. Heater (in) (Gal.) (Gal.) Conn. (in) (in) NAT. & L.P. (in) UCG100H199 199,999 73 ¼ 52 ½ 55 ½ 69 ¾ 63 ¼ 1 ½ ¾ ¾ UCG100H270 270,000 73 ¼ 52 ½ 55 ½ 69 ¾...

  • Page 6: Section Iii: General Information

    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 an ON/OFF switch, which has markings when the main power is turned on to indicate power to the water heater. COMBUSTION SYSTEM This water heater is equipped with a self-compensating negative pressure pre-mix combustion system.
  • Page 7 WARNING Keep clear of 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...

  • Page 8: Section Iv: Installation Instructions

    SECTION IV: INSTALLATION INSTRUCTIONS WARNING INSTALLATION OF THIS WATER HEATER REQUIRES ABILITY EQUIVALENT TO THAT OF A LICENSED TRADESPERSON 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 9 This water heater MUST NOT be installed in any location where gasoline or flammable vapors are likely to be present, unless the installation is such to eliminate the probable ignition of gasoline or flammable vapors. CAUTION The National Fuel Gas Code (ANSI Z233.1- latest edition) or in Canada The Natural Gas Installation Code CAN/CGA (B149.1 - latest edition), expressly prohibits the following: a.
  • Page 10 Input Front, sides and Rear “A” Less than or equal to 270,000 BTUH 0 in. (0.0 CM) 399,999 BTUH 0 in. (0.0 CM) (2 in. Rear ONLY) Figure 2a. Minimum Clearance To Combustible Material. Figure 2b. Recommended Minimum Clearances For Service Access.
  • Page 11 REMOVE CRATE Remove all banding and pry off crate sides carefully so as not to damage the water heater. 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 The draft hood relief opening of the water heater and combustion air inlet must be in the same atmospheric pressure zone. Large exhaust fans in kitchens and other locations can lower the air pressure inside an enclosure and interfere with the proper operation and venting of the water heater.

  • Page 13: Section V: Venting

    SECTION V: VENTING WARNING The venting system must be installed properly following all local codes or in the absence of local codes, the latest edition of the National Fuel Gas Code (ANSI Z223.1- latest edition), or in Canada, The Natural Gas Installation Code (B149.1-00 latest edition) or CAN/CGA B149.2 Propane Installation Code (Latest Edition).
  • Page 14 NOTICE For installations in Canada, field supplied vent piping must comply with CAN/CGA B149.1 (latest edition) and be certified to the Standard For Type BH, Class II, 65°C, Gas Venting Systems, ULC S636. Components of this listed system shall not be interchanged with other vent systems or unlisted pipe/fittings. All components and specified primers and cements of the certified vent system must be from a single system manufacturer and not intermixed with other system manufacturer’s vent system parts.
  • Page 15 Figure 3. Intake Vent Terminal Clearances (Referencing Other Appliance Venting Locations). 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) porch, deck or...
  • Page 16 Vent pipes serving power vented appliances are classified by building codes as “vent connectors”. Required clearances from combustible materials must be provided in accordance with information in this manual under LOCATION OF WATER HEATER and CLEARANCES, and with National Fuel Gas Code and local codes. Horizontal Installation In a horizontal application, it is important that moisture is not to be allowed to buildup in the intake vent pipe.
  • Page 17 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. CAUTION Failure to properly support the vent piping with hangers and clamps may result in damage to the water heater or venting system.
  • Page 18 4. Total vent length cannot exceed “Max Vent Length” on the venting table shown above. Example of Total Vent Length for UCG100H199 installation: A 3” venting system has a total of three 90-degree elbows and a total straight pipe length of 30 feet.

  • Page 19: Section Vi: Water Connections

    SECTION VI: WATER CONNECTIONS NOTE: BEFORE PROCEEDING WITH THE INSTALLATION, CLOSE THE MAIN WATER SUPPLY VALVE. After shutting off the main water supply, open a faucet to relieve the water line pressure to prevent any water from leaking out of the pipes while making the water connections to the water heater. After the pressure has been relieved, close the faucet.
  • Page 20 WARNING Keep clear of 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 21 TO FILL THE WATER HEATER 1. Close the water heater drain valve by turning the knob clockwise. If alternative water connections are provided but not used, make certain they are plugged (i.e. rear connections). 2. Open the cold water supply shut-off valve. 3.
  • Page 22 Connect the system supply and return piping to the water heater. Refer to Figure 7 and Figure 8 for installation examples. Maintain a minimum 1/2” clearance from hot water piping to combustible materials. Figure 7. Alternate Space Heating Connections. Figure 8. Typical Plumbing Schematic for Zoned Heating.

  • Page 23: Section Vii: Gas Connections

    SECTION VII: GAS CONNECTIONS The gas supply lines must meet all requirements of the National Fuel Gas Code (ANSI Z223.1-Latest Edition), or in Canada CAN/CGA B149.1 Natural Gas Installation Code (Latest Edition) or CAN/CGA B 149.2 Propane Installation Code (Latest Edition). The maximum permissible gas supply pressure is fourteen (14.0) inches (3.5 kPa) water column for natural and propane gas.
  • Page 24 WARNING DO NOT USE MATCHES, CANDLES, FLAME OR OTHER SOURCES OF IGNITION FOR THIS PURPOSE. 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 25: Setion Viii: Electrical Connections

    SETION 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 26: Section Ix: Operating Instructions

    SECTION IX: OPERATING INSTRUCTIONS Lighting And Shutdown Instructions WARNING Water heaters are heat-producing appliances. To avoid damage or injury there must be no materials stored against the water heater or vent system, and proper care must be taken to avoid unnecessary contact (especially by children) with the water heater and vent system.
  • Page 27 LIGHTING AND SHUT-DOWN INSTRUCTIONS Figure 10. Lighting Instruction Label. Table 4. 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)
  • Page 28 DANGER Hotter water increases the risk of scald injury. Scalding may occur within five (5) seconds at a temperature setting  of 140F (60 C). To protect against hot water injury, install an ASSE approved mixing valve in the water system. This valve will reduce point of discharge temperature by mixing cold and hot water in branch water lines.
  • Page 29 TEMPERATURE ADJUSTMENT (24V CONTROL SYSTEM) The water heater temperature setting is adjusted by using the control display mounted to the front of the water heater. The water heater thermostat is set at the lowest setpoint of 70F when shipped from the factory. The control display shows the temperature setpoint in degrees Fahrenheit (F) or degrees Celsius (C), and the status of the water heater (“Idle”...
  • Page 30 Water Heater Display and Control Buttons Shown flashing in display only when Temperature temp is adjusted Up Button Sequence of Temperature Setpoint setpoint °F operation Indicator in Degrees F or Degrees C Reads "Idle” or “Heating" Range 70 - Max °F idle Operational Status...
  • Page 31 Step 3: Press “SET” button for new setting to take effect immediately. “Setpoint” will stop flashing. If the “SET” button is not pressed, the new temperature setting will take effect in approximately 10 seconds. "Setpoint" flashes for 10 seconds setpoint °F idle Operational...
  • Page 32 Step 3: Press “SET” button for new setting to take effect immediately. The setpoint will stop flashing. If the “SET” button is not pressed, the new temperature setting will take effect in approximately 10 seconds. "Setpoint" flashes for 10 seconds setpoint °F idle...
  • Page 33 Step 3a: Press “Temperature Up” button to change temperature format to C. Changes to "°C"  °C °F/°C idle Status Operational SELECT “°F/°C” Flashes Step 3a Step 3b: Press “Temperature Down” button to change temperature format to F. Changes to "°F" “°F/°C”...
  • Page 34 Step 5: Pressing “SELECT” button will return display to setpoint in format selected (˚F or ˚C) immediately. Setpoint shown in °F °F idle Operational Status  SELECT P ress select Step 5 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).

  • Page 35: Section X: 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 FLOW SWITCH. GENERAL KEEP APPLIANCE AREA CLEAR AND FREE FROM COMBUSTIBLE MATERIALS, GASOLINE AND OTHER FLAMMABLE VAPORS AND LIQUIDS.
  • Page 36 MAINTENANCE SCHEDULE Following are the instructions for performing some of the recommended maintenance. Unit inspection and adjustment should be performed by a competent technician. Table 5. Suggested Maintenance Schedule. COMPONENT OPERATION INTERVAL REQUIRED Tank Sediment Removal Monthly Flushing Anode Rods Inspect Semi-Annually Replace as Required...
  • Page 37 3. Remove cover and gasket from cleanout opening. 4. Remove lime, scale or sediment using care not to damage the glass-lining. 5. Inspect cleanout plate gasket: Replace gasket if necessary (Contact Bradford White Local Distributor for correct part number). 6. Install gasket and cleanout plate. Be sure to draw plate up tight by tightening screws securely.
  • Page 38 CAUTION Before manually operating the valve, make sure that a drain line has been attached to the valve to direct the discharge to an open drain. Failure to take this precaution could mean contact with extremely hot water passing out the valve during this checking operation.

  • Page 39: Section Xi: Diagnostic And Troubleshooting 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, circulator turns on and damper opens. 2.
  • Page 40 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 Approximately 12 minutes after the last button press, the display will automatically return to the “User Mode”. Simultaneously pressing the “Select”...
  • Page 41 1. Max Setpoint (Display/Change) “Max Setpoint” value in Water Heater °F Setpoint idle Status Operational SELECT 2. Water Temperature Sensor Reading. Water °F Temp idle Status Operational  SELECT 3. Flame Current of Pilot Flame Sensor (Displays only in the Heating Cycle) µA Flame Heating...
  • Page 42 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 43 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 Status...
  • Page 44 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 45 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). "Max Setpoint" continues to flash while making adjustments °F Setpoint ...
  • Page 46 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 Operational Status ...
  • Page 47 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 Status Operational  SELECT Step 2: Press the “Set” button to enter the setting mode. “Setpoint” will flash in the water heater display. "Setpoint"...
  • Page 48 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 49 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 Status Operational  SELECT Step 3a: Press “Temperature Up” button to change temperature format to ˚C. Changes to "°C" "°F/°C"...
  • Page 50 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 51 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 52 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 53 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 54 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 55 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 56 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? ...
  • Page 57 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 upper sensor assembly, compare the resistance of the sensor terminals (yellow and black lead for upper sensor) as measured by an ohmmeter to the water temperature as measured by an accurate thermometer.

  • Page 58: Section Xii: Parts List

    SECTION XII: PARTS LIST Water Heater Full Assembly (270,000 BTU/h and Below) 1 Surround Assembly Combustion Assembly (Specify model) 3 Ignition Control Assembly 4 Draft Hood (Specify model) 5 Swell Latch 6 Front Hot Water Outlet 7 Baffle 2” Flue (Specify Model) 8 Control Display 9 Front Cold Water Inlet 10 Plastic Hole Closure...
  • Page 59 2 Combustion Assembly 1 Combustion Assembly (Specify model) Sensor – Flame Sense 2 Blower/Gas Valve Assembly (Specify model) 14 Igniter – Direct Spark Ignition 3 Burner Assembly (Specify model) 15 Blower / Burner Mounting Plate 4 Blower – (Specify model) 16 Gasket Burner (Specify Model) 5 Gasket &...
  • Page 60 3 Ignition Control Assembly and Harnesses Control Panel Hex Nut Control Ignition Control Harness Transformer Power Cord Harness Display Panel T-Stat Sensor Harness Screw High Voltage Spark Cable Switch Main Power Blower/Circ/Damper Harness Control Display Ground Wire Weld Stud Flame Sense Harness Customer must specify complete model number and serial number when ordering service parts.

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Ucg100h270Ucg100h399

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