Conversion Kit Instructions For Models: CEHD50(A), CEHD80(A) & CEHD120(A) (To be performed ONLY by qualified service providers) 238-51019-00C 4/19
Instructions for Conversion of HD Commercial Electric Models NOTICE The conversion procedure outlined in this manual is to be executed ONLY by Qualified Service Personnel. Before attempting conversions, it is recommended that you read the detailed instructions described herein. The purpose of this instruction manual is to outline the procedure for changing the wattage, voltage, and electrical phase for the commercial electric water heaters manufactured by Bradford White Corporation.
Instructions for Conversion of HD Commercial Electric Models Safety Precautions NOTICE The conversion procedure outlined in this manual is to be executed ONLY by Qualified Service Personnel. Before attempting conversions, it is recommended that you read the detailed instructions described herein. WARNING Water heaters are heat producing appliances. To avoid damage or injury, do not store materials against the water heater or vent-air intake system.
Instructions for Conversion of HD Commercial Electric Models Introduction These conversion kits were created to provide greater flexibility to match the water heater to its needed application. Water heaters suitable for conversion have been wired at the factory to the maximum electrical duty for which they have been designed, to have the maximum current possible within the allowable conversion options.
Instructions for Conversion of HD Commercial Electric Models Water Heater Preparation For narrow control cabinet (12” x 45” rectangle) 1. Complete removal of the water heater from the shipping crating is not required for conversions. Locate the front of the water heater with the control cabinet through the plastic. Using a hammer and/or pry bar remove the wood slat in the middle of the front crating and set aside (see Figure 1). Push the plastic cover to the top of the water heater.
Instructions for Conversion of HD Commercial Electric Models 3. Remove and set aside the insulation pieces that are inside the lower portion of the control cabinet to gain access to the elements (see Figure 3). Insulation Pieces Figure 3.
Instructions for Conversion of HD Commercial Electric Models For wide control cabinet (19” x 19” upper section and 12” x 26” lower section (CEHD(50,80,120)(A)3(45,54)(L,C,H)CF) 1. Complete removal of the water heater from the shipping carton is not required for conversions. Locate the front of the water heater with the control cabinet through the plastic. Using a hammer and/or pry bar remove the wood slat in the middle of the front crating and set aside.
Instructions for Conversion of HD Commercial Electric Models 3. Remove and set aside the insulation pieces that are inside the lower portion of the control cabinet to gain access to the elements (see Figure 5). Insulation Pieces Figure 5.
Instructions for Conversion of HD Commercial Electric Models General Conversion Guidelines • No addition or subtraction of heating elements is allowed in the conversion process (e.g. a 3element water heater must remain a 3-element water heater). • Conversion of a water heater to 208V, 54kW single phase is not allowed as the maximum amperage of the terminal block would be exceeded. This model configuration is not available from the factory.
Instructions for Conversion of HD Commercial Electric Models Conversion Kits for Models CEHD50(A), CEHD80(A) and CEHD120(A) 1. Refer to Table 1 below, which contains water heater kW, element wattage, voltage, and kit part numbers. 2. Locate the kW of the required water heater. 3. Move across the table (to the right) until you reach the required voltage. 4. Select the required kit number. 5. Use that kit for this conversion. 6. Refer to the remaining pages for a detailed conversion procedure. Table 1.
Instructions for Conversion of HD Commercial Electric Models Wattage Conversion --- Element Changes 1. Disconnect the water heater from the electrical supply and completely drain the water heater tank. 2. Using a Phillips head screwdriver, disconnect the electrical wires from the element terminals (see Figure 6). Electrical Wires Element Terminals Figure 6. Electrical Wires and Element Terminals 3. Remove and replace one element at a time. 4.
Instructions for Conversion of HD Commercial Electric Models Figure 7. Element Gasket 7. Thread the replacement element into the element fitting until it is seated. Use caution not to crossthread the element while installing. Tighten ½ to ¾ turns with the element wrench. Do not over tighten or damage to the element gasket can occur. 8. Re-connect the wiring to the element terminals. The screws must be snuggly tightened but caution must be exercised not to over tighten.
Instructions for Conversion of HD Commercial Electric Models Voltage Conversion Immersion Thermostat Models --- (From 208, 240, 480V to 208, 240, 480V) (Same process for 277, 380, 415V to 277, 380, 415V) 1. Immersion thermostat models require installation of the appropriate elements and a change to the transformer connection. Immersion thermostats are equipped with transformers having 4 input connections; common (COM), 208V, 240V and 480V or common (COM), 277V, 380V, AND 415V (see Figure 8). Figure 8.
Instructions for Conversion of HD Commercial Electric Models 2. Using the masking tape, label the 4 wires connected to the transformer with the appropriate connection (see Figure 9 which is shown as a 240V connection (as an example). Keep in mind that the 240V wire may be connected to the 208V or 480V connection based on the initial configuration of the water heater). Figure 9. Labeled Transformer Connections 3. Remove the four wires from the transformer. 4.
Instructions for Conversion of HD Commercial Electric Models Electrical Phase Conversion Electrical phase conversion will require a change from single-phase to three-phase or from three-phase to single-phase. Each of these conversions will be explained separately. Instructions to convert FROM Three-Phase TO Single-Phase: 1. Figure 11 shows a three phase terminal block as originally manufactured. Disconnect blue wires and yellow wires from terminal L-3 of the terminal block.
Instructions for Conversion of HD Commercial Electric Models Instructions to convert FROM Single-Phase TO Three-Phase: 1. Figure 12 shows a single phase terminal block as originally manufactured. Disconnect yellow wires from terminal L-1 of the terminal block. Field Connections L1 – Red and Yellow Wires L2 – Black and Blue Wires L3 – No Wires Figure 12. Single Phase Terminal Block Connections 2. Disconnect blue wires from terminal L-2 of the terminal block. 3.
Instructions for Conversion of HD Commercial Electric Models Re-check and Inspection of Conversion WARNING Re-check and inspect to make certain all components involved in the conversion are correct and secure. 1. Re-check all of the electrical wiring changes made against the wiring diagram requirements for accuracy. 2. Check to insure all of the electrical connections are tightly secured and the electrical wire routings are orderly. 3. Special attention must be given to the electrical heating elements.
Instructions for Conversion of HD Commercial Electric Models 5. The element resistance should be within the range shown in Table 2: Table 2. Ohms of Electrical Resistance. Element Wattage 2000 3000 4000 4500 5000 6000 208 volts 20.3-22.9 13.5-15.3 10.2-11.4 9.0-10.2 8.2-9.2 6.7-7.6 240 volts 27.1-30.5 18.0-20.4 13.5-15.3 12.0-13.6 10.8-12.2 9.0-10.2 Electrical Resistance of the Element 277 volts 380 volts 415 volts 480 volts 36.1-40.7 67.9-76.5 80.9-91.3 114.3-122.1 24.1-27.1 45.2-51.0 54.0-60.8 72.
Instructions for Conversion of HD Commercial Electric Models Concluding Steps 1. Refer to Figure 13, which displays a typical commercial electric rating plate that must be altered. This rating plate is placed on every commercial electric water heater produced by Bradford White Corporation. Locate this rating plate on the water heater you have just converted.
Instructions for Conversion of HD Commercial Electric Models 3. Remove the adhesive peel strip and place this label onto the rating plate in such a manner that the new electrical data will appear in place of the data originally marked (see Figure 15). Figure 15. Rating Plate with Overlay 4. Replace the insulation pieces in the lower portion of the control box that were removed in Step 3 of the Water Heater Preparation instructions. Insulation Pieces Figure 16. Inside Control Box Figure 17.
Instructions for Conversion of HD Commercial Electric Models 5. Close the control cabinet door and secure with the screws removed in Step 2 of the Water Heater Preparation instructions. If the converted water heater had a wider control box, replace the element cover with the screws removed in Step 2 of the Water Heater Preparation instructions. 1 Phillips Head Screw 2 Phillips Head Screws 8 – ¼” Hex Drive Screws Figure 18. Control Cabinet Screws Figure 19. Control Cabinet Screws 6.
Instructions for Conversion of HD Commercial Electric Models NOTES 22
Instructions for Conversion of HD Commercial Electric Models NOTES 23
Ambler, PA For U.S. and Canada field service, Contact your professional installer or local Bradford White representative. Sales/800-523-2931 Fax/215-641-1670 Parts Fax/215-641-2180 Technical Support/800-334-3393 Fax/269-795-1089 Warranty/800-531-2111 Fax/269-795-1089 International: Telephone/215-641-9400 Telefax/215-641-9750 Halton Hills, ON Sales & Technical Support /866-690-0961 905-203-0600 Fax/905-636-0666 Email parts@bradfordwhite.com techserv@bradfordwhite.com www.bradfordwhite.
