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UW50 UTENSIL WASHER
MODEL
UW50 ML-27838
701 S. RIDGE AVENUE
TROY, OHIO 45374-0001
937 332-3000
FORM 18241 Rev. G (Aug. 2007)
www.hobartcorp.com
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TABLE OF CONTENTS GENERAL ..............................................................................................................................................................3 INSTALLATION ......................................................................................................................................................3 Unpacking ...........................................................................................................................................
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INSTALLATION, OPERATION AND CARE OF MODEL UW50 UTENSIL WASHER SAVE THESE INSTRUCTIONS GENERAL The UW50 Utensil Washer is the answer to volume utensil washing problems in your kitchen, bakery or supermarket operation. The UW50 occupies a minimum amount of fl oor space (under 48" x 43" with door open) and does not require separate dishtables. The upper portion of the door raises, while the lower portion swings out to provide a drain platform. The rack can then be pulled out for easy loading and
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– 4 – UW50 with 10KW Electric Tank Heat with or without 14KW Electric Booster – Installation Diagram: D-812969 sheet 1
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– 5 – UW50 with Steam Tank Heat (Injector or Coil) with or without 14KW Electric Booster – Installation Diagram: D-812969 sheet 2
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– 6 – UW50 with Gas Tank Heat with or without 14KW Electric Booster – Installation Diagram: D-812969 sheet 3
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PLUMBING CONNECTIONS Plumbing connections must comply with applicable sanitary, safety and plumbing codes. Water Supply Connection Water must be proper hardness. Recommended water hardness is 1 grain or less. Higher hardness may cause excessive formation of lime scale. Chlorides must not exceed 50 ppm. A water hammer arrestor (meeting ASSE-1010 Standard) should be provided (by others) in the water 3 supply line ahead of its connection to the line strainer. The water supply line should be a /
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VENTING REQUIRED WITH GAS HEAT (OPTIONAL WITH STEAM OR ELECTRIC HEAT) The Hobart UW50 Utensil Washer, equipped for gas tank heat, is not provided with a fl ue collar and is not intended to have the fl ue directly connected to a ventilation system. However, the products of combustion must be vented to the outside air. A vent hood over the entire utensil washer (Fig. 1) can be employed to vent both the moist air from the wash chamber and the fl ue gases from the gas tank heat. The volume of fl
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RATE OF EXHAUST FLOW CALCULATIONS (FIG. 2) Based on the International Mechanical Code (latest edition). LENGTH CLEARANCE HEIGHT Fig. 2 Canopy size and location The inside lower edge of canopy-type Type I and II commercial hoods shall overhang or extend a horizontal distance of not less than 6 inches (152 mm) beyond the edge of the top horizontal surface of the appliance on all open sides. The vertical distance between the front lower lip of the hood and such surface shall not exceed 4 feet (1
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DETERGENT FEEDER (OPTIONAL BY OTHERS) 7 If installing a detergent feeder (by others), remove cap to expose /8" diameter hole at rear of machine. RINSE AGENT FEEDER (OPTIONAL BY OTHERS) 1 If a rinse agent feeder (by others) is being installed, remove the /8" NPT pipe plug to access the tapped hole in the incoming water line below the vacuum breaker on top of the machine. VENT EXIT A vent exit (7" x 11" x 10") is provided in the top of the machine to allow for expansion of air. It should not be
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OPERATION CONTROLS (FIG. 3) SELECTOR SWITCH START 6 4 POWER 2 OFF CYCLE FILL PL-56351 Fig. 3 SELECTOR SWITCH OFF Electric power to machine is off. POWER and CYCLE lights are off. FILL Timed fi ll requires about 3 minutes. Be sure Drain Lever (Fig. 4) is closed. Press the START button to begin a timed fi ll. SELECT WASH CYCLE and press START. 2 A 2-minute wash cycle is followed by a 5-second pause and a 24-second rinse. 4 A 4-minute wash cycle is followed by a 5-second pause and a 24-second
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GENERAL OPERATING INSTRUCTIONS Keep the utensil washer clean to provide best results. Do not allow foreign objects to enter the unit, especially metallic contaminants. Do not wash aluminum utensils in the utensil washer. The caustic detergent and high water temperature will cause aluminum oxide formation (black). Copper utensils may require polishing to remove oxide formation after exposure to utensil washer cleaning for a period of time. Stainless steel utensils should clean quickly and eas
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The wash and rinse arms are easily removed for cleaning. To remove the upper wash and rinse arm (Fig. 6): • Unscrew the hand knob. • Remove the upper rinse and wash arms together. Be careful not to drop these arms. • Replace after removing any obstructions by reversing the removal procedure. To remove the lower wash and rinse arm (Fig. 7): • Lift off the rinse arm. • Unscrew the rinse arm bearing pin. Fig. 6 • Lift off the lower wash arm. (It is not necessary to remove the spacer located on t
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MAINTENANCE Disconnect electrical power supply and follow lockout / tagout procedures. MOTOR The motor has permanently sealed bearings and requires no lubrication. WASH AND RINSE ARMS All wash arms and rinse arms should turn freely and continue turning for a few seconds after being whirled by hand. To check, DISCONNECT ELECTRICAL POWER SUPPLY, rotate arms and remove any obstructions causing improper operation. Refer to CLEANING THE UTENSIL WASHER on pages 12 and 13. If the slanted strainer pa
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TROUBLESHOOTING SYMPTOM POSSIBLE CAUSE Utensils spotted or Overloaded rack. not clean Low water level. Water conditions: — Incorrect rinse water temperature. Refer to WATER SUPPLY CONNECTION, page 7. — Excessive water hardness may indicate that a water softener is needed. — Incorrect detergent type or concentration for water conditions. — Incorrect rinse additive for water conditions. Inadequate rinse. — Dirty line strainer causing reduced water fl ow. Turn off water supply. Remove strainer cap
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SYMPTOM POSSIBLE CAUSE Machine won't Fuse blown or circuit breaker tripped. operate. Selector Switch is turned OFF. Check water level in tank. — Drain overfl ow tube may not be seated. — Worn or torn O-Ring may cause overfl ow tube not to seat. Leaking valves. Solenoid valves. — Contact Service. Vacuum breaker. — Foreign material preventing proper valve operation. A critical period is soon after installation when pipe compound or metal shavings may lodge at the valve seat. DISCONNECT ELECTRICAL
