EWHB Unit Heaters Washdown / Corrosion Resistant Industrial / Commercial Electric Unit Heater Owner’s Manual This manual covers installation, operation and maintenance. Read carefully before attempting to install, operate or service the EWHB Series Unit Heater. IMPORTANT INSTRUCTIONS SAVE THESE INSTRUCTIONS FOR FUTURE REFERENCE Reznor, LLC O’Fallon, MO 63368 • USA 800-695-1901 www.reznorhvac.
IMPORTANT INSTRUCTIONS Installation and maintenance personnel should familiarize themselves with this manual and all the IMPORTANT INSTRUCTIONS before installing or working on this heater to avoid potential unsafe conditions, severe property damage, personal injury or death. 1. Read all instructions before installing and operating this heater. 2. Verify that the supply voltage and phase to the heater matches the nameplate rating before energizing. 3. Potentially lethal voltages are present.
INSTALLATION INSTRUCTIONS RISK OF FIRE / EXPLOSION This heater should not be used in potentially explosive atmospheres. Do not use in areas where gasoline, paint or flammable liquids are used or stored. Keep electrical cords, drapery, furnishings, insulation and other combustibles at least 3 feet (0.9m) from the front of the heater and away from the sides, rear and top. Installation minimum clearances specified both on the heater nameplate and in the owner’s manual must be maintained.
INSTALLATION INSTRUCTIONS – Continued B. Mechanical Installation: These heaters are to be mounted for horizontal discharge only. Mounting is to be accomplished by using either (4) 3/8x16 threaded rods (supplied by others) or the stainless steel swivel mounting bracket factory supplied with the heater. Lock washers should be used on all mounting nuts and bolts to ensure they don’t vibrate or work loose due to fan vibration or other vibration transmitted to the heater.
INSTALLATION INSTRUCTIONS – Continued Ceiling or wall mount using swivel bracket (cont): Optional Ceiling Installation using 4 threaded rods: For ceiling installation using threaded rods, secure the four rods to the ceiling using locknuts. TABLE 4: KW BH BL 4.25” 19.50” (108mm) (495mm) 7.125” 22.25” 12.1 to 47 (181mm) (565mm) <= 12 M 8.50” (216mm) 3.
INSTALLATION INSTRUCTIONS - Continued ELECTRIC SHOCK HAZARD Electrical installation should be made by a qualified licensed electrician. Wiring procedures, connections and grounding shall be in accordance with the national and local codes having jurisdiction. C. Electrical Installation: Follow these instructions to complete the electrical installation: 1. External branch circuit protection is required. See nameplate ratings and follow Code recommendations. 2.
OPERATING INSTRUCTIONS RISK OF FIRE / EXPLOSION This heater should not be used in potentially explosive atmospheres. Do not use in areas where gasoline, paint or flammable liquids are used or stored. Keep electrical cords, drapery, furnishings, insulation and other combustibles at least 3 feet (0.9m) from the front of the heater and away from the sides, rear and top. To prevent a possible fire, do not block or allow foreign objects to enter air intakes or exhaust in any manner.
OPERATING INSTRUCTIONS - Continued RISK OF FIRE / EXPLOSION This heater should not be used in potentially explosive atmospheres. Do not use in areas where gasoline, paint or flammable liquids are used or stored. Keep electrical cords, drapery, furnishings, insulation and other combustibles at least 3 feet (0.9m) from the front of the heater and away from the sides, rear and top. To prevent a possible fire, do not block or allow foreign objects to enter air intakes or exhaust in any manner.
MAINTENANCE INSTRUCTIONS ELECTRIC SHOCK HAZARD Potentially lethal voltages are present. Be sure to lock the branch circuit disconnect switch in the OFF position and tag the circuit “Out for Maintenance” before working on this equipment. RISK OF INJURY / BURN Do not attempt to service or clean heater while unit is operating as there is a hazard from electric shock, injury from operating fan blade and burns from hot heating elements.
