A Star Manufacturing Company 10 SUNNEN DRIVE, ST. LOUIS, MO/U.S.A. 63143 PHONE (314) 781-2777 FAX (314) 781-3636 HOLMAN CONVEYOR SANDWICH WARMER MANUAL MODEL QT14 FOR SERVICE INFORMATION U. S.
Common Questions, Myths, and Misconceptions of Holman Conveyor Ovens Misconception: Reality: High Voltage (208v typical) is always the same. An oven designed for 208v should operate from 208-215v. This range is typical of local power grids and daily fluctuations. Some municipalities operate at 220 and 240v which would require design variations. Improper voltage can result in reduced control, performance, and reliability. Voltage mismatches or daily fluctuations can be monitored for corrective action.
UNCRATING AND INSPECTION Unpack unit and components from container. Remove all visible packing material, inspect unit for damage. If damage is discovered, file a claim immediately with the carrier that handled the shipment. The following should be included in the container: • • 1ea. baking oven with heaters, and conveyor belt in place. (NOTE): Remove heating element-shipping supports. 1ea. stainless steel unload tray, 1ea. stainless “Bake Aid” bracket 1ea. “Bake Aid” magnet label, 2ea. crumb trays & 4ea.
5. Allow approximately 5 to 8 minutes for the twin-fan cooling system to come on. Check the air intake fan area as noted below and be sure that there is a sufficient flow of air into the control box. Air intake areas are located on each side of the control panel. 6. If all heaters and conveyor system are operating properly, turn the master On/Off switch to the OFF position and allow unit to cool.
OPERATION 1. Turn Master On/Off switch to the ON position and variable speed control to fastest time setting. Allow 1 hour for complete machine warm up. 2. Adjust speed control to desired speed. 3. Adjust speed as required during operation to achieve a good bake. 4. When done for the day, turn Master On/Off switch to the OFF position. The conveyor will stop and the elements will go off. The two fans should continue to run.
2. Remove the Crumb Trays from both sides of the oven (daily) as shown below (DO NOT CLEAN WITH CAUSTIC CLEANERS). 3. For lightly soiled conveyor surfaces a damp cloth or scotch pad can be used without removing the conveyor belt. (daily) For heavily soiled conveyor surfaces refer to the Preventative Maintenance section for more detailed instruction to remove the conveyor belt. The belt will need removed for more thorough cleaning. 4. Check air intake area for dust and grease.
TROUBLESHOOTING GUIDE # UNIT WILL NOT HEAT, CONVEYOR BELT WILL NOT TURN. o Be sure main circuit breaker is switched to the ON position. o Check that the unit is connected to power and Master On/Off switch is ON. o Be sure HEAT LIMIT SWITCH is pushed in (see below). Heat Limit Switch Crumb Tray Slots # UNIT WILL NOT HEAT, CONVEYOR TURNS. o Check to see if the Master On/Off Switch is in the ON position.
# CONVEYOR WILL NOT TURN, UNIT HEATS PROPERLY o DISCONNECT UNIT FROM POWER SOURCE o Check both fuses (replace if necessary) Twin Fuse Block o Check for obstructions that may have caused a conveyor jam. Utensils, foil or large pieces of food could stall the motor. If there are no visible obstructions, try turning the belt manually. If the belt turns, remove the power supply panel and check for loose sprockets or chain.
PREVENTIVE MAINTENANCE DAILY CLEANING PROCEDURES TO KEEP YOUR HOLMAN MODEL QT14 CONVEYOR SANDWICH WARMER AT PEAK OPERATING EFFICIENCY, THE FOLLOWING INSTRUCTIONS ARE RECOMMENDED: Turn power off and allow cooling fans to run until the control box is cooled off. The fans are controlled by a thermostat in the control box. DISCONNECT UNIT FROM POWER SUPPLY OR TURN POWER OFF AT WALL BREAKER. BE SURE THE SANDWICH WARMER IS COMPLETELY COOLED BEFORE PERFORMING ANY OF THE FOLLOWING PROCEDURES. 1.
4. Wipe exterior of unit with a damp cloth. 5. Wipe fan grills/air intakes (located on side of the unit) to remove any dust build up using a damp cloth. Reassemble unit making sure crumb trays are properly installed. The crumb tray should slide into the slot on each side of the area under the belt. 6. Clean the viewing window by removing the six thumbscrews on the rear of the sandwich warmer. Remove the window trim ring. Then remove the window spacer. Then carefully remove the Neo-Ceram glass. 7.
WEEKLY CONVEYOR BELT CLEANING PROCEDURES TO KEEP YOUR HOLMAN MODEL QT14 CONVEYOR SANDWICH WARMER AT PEAK OPERATING EFFICIENCY, THE FOLLOWING INSTRUCTIONS ARE RECOMMENDED: Turn power off and allow cooling fans to run until the control box is cooled off. The fans are controlled by a thermostat in the control box. DISCONNECT UNIT FROM POWER SUPPLY OR TURN POWER OFF AT WALL BREAKER. BE SURE THE SANDWICH WARMER IS COMPLETELY COOLED BEFORE PERFORMING ANY OF THE FOLLOWING PROCEDURES. 1.
MONTHLY CLEANING PROCEDURES Turn power off and allow cooling fans to run until the control box is cooled off. The fans are controlled by a thermostat in the control box. DISCONNECT UNIT FROM POWER SUPPLY OR TURN POWER OFF AT WALL BREAKER. BE SURE THE SANDWICH WARMER IS COMPLETELY COOLED BEFORE PERFORMING ANY OF THE FOLLOWING PROCEDURES. 1. Working from the power supply side of the oven, locate the electrical box side panel. Remove two screws holding panel in place and remove panel.
3. Clean air intake on the side of Sandwich Warmer by vacuuming any dust and debris built up on fan grill. 4. Return unit to counter and remove screw holding power supply side panel in place. Carefully lift panel up and out. Two ground straps hold panel to oven chassis. DO NOT REMOVE GROUND STRAPS OR DISCONNECT POWER SUPPLY CORD. Vacuum any dust and debris from inside of unit (repeat for opposite side). 5. Replace all panels when done. CHECK THAT ALL WIRES DO NOT GET PINCHED AS THE PANELS ARE REPLACED.
LONG TERM CLEANING PROCEDURES (every 6 months) Turn power off and allow cooling fans to run until the control box is cooled off. The fans are controlled by a thermostat in the control box. DISCONNECT UNIT FROM POWER SUPPLY OR TURN POWER OFF AT WALL BREAKER. BE SURE THE SANDWICH WARMER IS COMPLETELY COOLED BEFORE PERFORMING ANY OF THE FOLLOWING PROCEDURES. 1. With the power off, allow the unit to cool completely. Place Sandwich Warmer on non-extension end.
MAINTENANCE PROCEDURES REPLACING HEATER TUBES FOR BEST TOASTING PERFORMANCE, THIS PROCEDURE SHOULD BE DONE EVERY SIX MONTHS Turn power off and allow cooling fans to run until the control box is cooled off. The fans are controlled by a thermostat in the control box. DISCONNECT UNIT FROM POWER SUPPLY OR TURN POWER OFF AT WALL BREAKER. NOTE: PERFORM THIS MAINTENANCE ONLY WHEN THE CONVEYOR SANDWICH WARMER IS COMPLETELY COOL. 1. Position unit for access to front and rear panels.
8. Gently slide one heater tube out of hole in warmer wall. 9. Select new heater tube to be installed. To ease installation, a short piece of tubing such as an automotive brake line or sipping straws may be used. Insert heater tube wire into one end of tubing. Slide the tubing over the wire and use the tube to guide the wire and heater tube through the body of the machine. NOTE: Top and bottom tubes are of different wattage ratings.
REPLACING FAN MOTORS Turn power off and allow cooling fans to run until the control box is cooled off. DISCONNECT UNIT FROM POWER SUPPLY OR TURN POWER OFF AT WALL BREAKER. NOTE: PERFORM THIS MAINTENANCE ONLY WHEN THE CONVEYOR SANDWICH WARMER IS COMPLETELY COOL. 1. Remove the panel with the fan that needs replaced. 2. Unplug the power supply cord. Remove any wire ties holding the cord to the fan. Disconnect the ground wire if present. 3. Remove the four screws attaching the fan and grill to the panel. 4.
REPLACING BELT DRIVE MOTOR Turn power off and allow cooling fans to run until the control box is cooled off. DISCONNECT UNIT FROM POWER SUPPLY OR TURN POWER OFF AT WALL BREAKER. NOTE: PERFORM THIS MAINTENANCE ONLY WHEN THE CONVEYOR SANDWICH WARMER IS COMPLETELY COOL. 1. Remove the unload tray and crumb trays. 2. Lift the machine to stand on the unload end. The machine can then be rotated again to rest it on the top. This will give the most stable access to the bottom control box area.
Note: During factory assembly, a 1/8” side-to-side play is adjusted into the driveshaft to allow for chassis expansion. 1. Unit must be cool 2. Do not adjust the sprocket on the driveshaft. 3. Insert a 1/16” spacer (drill bit etc) between the driveshaft sprocket and the washer that is outside the bearing. 4. Measure the distance “A” while holding the sprocket against the spacer. 5. Adjust the sprocket on the drive motor so that 1 dimension “B” is equal to “A” +/- /16”.
Visit our Website at: www.star-mfg.com Email: service@star-mfg.com THOROUGHLY INSPECT YOUR UNIT ON ARRIVAL This unit has been tested for proper operation before leaving our plant to insure delivery of your unit in perfect condition. However, there are instances in which the unit may be damaged in transit. In the event you discover any type of damage to your product upon receipt, you must immediately contact the transportation company who delivered the item to you and initiate your claim with same.
8 24 6 3 33 10 11 34 22 23 20 2 16 12 38 53 9 44 18 5 13 14 45 43 47 1 7 15 52 19 37 48 EAT ING INGS SETT ONS PREH SETT ED N UCTI S S E BEGI DESIR COOL INSTR ING:TO TO REVIS DARD D ES, STAN S: UNIT ATING OPENON R SPEE TO HOURWICH NOS OPERR UNTIL POWE SAND QUIZ EYOR PRIO NESS ATES TO ON TURN CONVBUSI OPER BAKE SET NG BAKE A FAN DURIRVE EVE OBSEACHI E: OFF R TO CLOS Q Q Q AT POWE TURN Q 42 46 32 17 21 41 30 52 TYPICAL QT14 EXPLODED PARTS VIEW 31 51 40 53 36 4 50 39 35
PARTS LIST February 23, 2007, Rev D HOLMAN CONVEYOR SANDWICH WARMER MODEL QT14 - QT14R Key Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 31b 32 33a 33b Part Number Number Per Unit GE-100715 1 GE-100991 1 GE-101390 1 GE-402340 2 GE-402356 1 GE-402705 1 GE-402609 1 GE-402689 1 GE-101028 1 GE-402709 1 GE-402710 1 GE-402729 1 2M-200816 1 GE-402651 2 GE-402359 1 GE-402631 1 GE-402344 2 GE101029 2 GE-402654 1 GE-100944 1 GE-402610 1 2P-115362 1 2P-200650 1 2P-150
PARTS LIST February 23, 2007, Rev D HOLMAN CONVEYOR SANDWICH WARMER MODEL QT14 - QT14R Key Number Part Number Number Per Unit PS-Z10286 INCLUDES: 2U-Z9657 1 2P-200652 1 2P-200646 1 2C-Z10075 1 2A-Z10161 1 2M-Z10161 1 2R-200721 1 2R-200562 1 2R-200761 1 GE-118067 1 2Q-200588 1 2A-Z0314 4 GE-160031 1 2B-200620 3 2P-200785 2 2P-200766 2 GE-101254 1 GE-101255 1 2A-101257 1 GB-112262 4 2A-200672 3 2M-201822 1 2E-200387 2 2E-200554 6 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 ACCESSORIES 52 QTEX
WIRING DIAGRAM #020514A QT14 W/ POT SPEED CONTROL THREE PHASE DELTA SOURCE WHT BLK WHT WHT BLK RED RED RED WHT BLK YEL BLU BLK BLK YEL RED RED WHT BLK WHT BLK ORN WHT BLK BLK RED BLK DETAIL OF RESISTOR/DIODE TERMINAL BLOCK DIODE 250 OHM POT (PART OF GE-135702) WHT YEL 47 OHM BLK IF FURTHER ASSISTANCE IS REQUIRED: CONTACT STAR/HOLMAN FACTORY SERVICE TEAM AT 1-800-807-9054 20
WIRING DIAGRAM #020513A QT14 W/ POT SPEED CONTROL SINGLE PHASE - 208/220/240 ORN WHT DIODE 47 OHM DETAIL OF RESISTOR/DIODE TERMINAL BLOCK WHT MOLDED FAN CORDS WHT WHT YEL BLK BLK BLK BLK WHT BLU WHT YEL BLK PUR WHT ORN BLU ORN WHT BLU BLK BLK WHT WHT BLK PUR YEL 250 OHM POT (PART OF 135702) YEL BLK RED BLK IF FURTHER ASSISTANCE IS REQUIRED: CONTACT STAR/HOLMAN FACTORY SERVICE TEAM AT 1-800-807-9054 21
TOP HEATERS WINDOW SIDE RED BOTTOM HEATERS BLU BLU BLU CONTROL SIDE BLK YEL BLU BLU BLU BLK BLK BLK YEL FAN SWITCH N L1 L2 L3 Gnd WHT ORG RED WHT WHT WHT RED BLK FUSE BLK WHT FUSE ON/OFF WHT PILOT LIGHT BLU RED WHT WHT BLK BLK GRN BLK RESET SWITCH YEL 250 OHM POT (PART OF GE-135702) DRIVE MOTOR: USE BLK/WHT FOR 208V USE BLK/BLU FOR 240V BLK THIS DRAWING CONTAINS INFORMATION CONFIDENTIAL TO STAR MFG. INT'L. INC.
STAR MANUFACTURING 10 Sunnen Drive, St. Louis, MO 63143 U.S.A. (800) 807-9054 (314) 781-2777 Parts & Service (800) 807-9054 www.star-mfg.
