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SERVICE MANUAL
HEATED LANDING ZONE (HLZ 18 AND HLZ 22)
This equipment chapter is to be inserted in the Equipment Manual.
MANUFACTURED BY FRYMASTER, L.L.C.
P.O. BOX 51000
SHREVEPORT, LOUISIANA 71135-1000
PHONE 1(318)865-1711
1 (800) 24 FRYER
TABLE OF CONTENTS
1. WARRANTY STATEMENT............................................................................................................ 1
1.1 WARRANTY PROVISIONS - HEATED LANDING ZONE ..............................
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THIS SERVICE MANUAL SUPERCEDES ALL PREVIOUS EDITIONS OF THE HLZ SERVICE MANUAL. FOR YOUR SAFETY DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE VAPORS AND LIQUIDS IN THE VICINITY OF THIS OR ANY OTHER APPLIANCE. DO NOT OPERATE OR SERVICE THE HLZ SERIES WITHOUT FIRST READING THIS MANUAL. DO NOT OPERATE THE HLZ SERIES UNLESS IT HAS BEEN PROPERLY INSTALLED AND CHECKED. DO NOT OPERATE THE HLZ SERIES UNLESS ALL SERVICE AND ACCESS PANELS ARE IN PLACE AND P
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1. WARRANTY STATEMENT The Frymaster Corporation makes the following limited warranties to the original purchaser only for this equipment and replacement parts: WARRANTY PROVISIONS - HEATED LANDING ZONE A. The Frymaster Corporation warrants all components against defects in material and workmanship for a period of 1 year. B. All parts, with the exception of fuses, are warranted for 1 year after installation date of cabinet. C. If any parts, except fuses, become defective during the fir
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Quantity Needed ____________________ Service may be obtained by contacting your local Frymaster Authorized Service Center/Distributor. Service information may be obtained by calling the Frymaster Service Department. The following information will be needed in order to assist you quickly and efficiently: Model Number _________________________ Serial Number _________________________ Nature of the Problem ___________________ _____________________________________ _____________________
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3. HEATED LANDING ZONE The Heated Landing Zone or HLZ is designed to hold assembled sandwiches. By circulating heated air evenly across the open staging area, the Heated Landing Zone keeps sandwiches hot without drying or cooking. The Heated Landing Zone meets all McDonald’s standards for safety, efficiency, food safety, and cleanliness. 4. INSTALLATION/SETUP Optional Burger Bumper Installed (unit built before 10/98) Upon arrival, inspect the HLZ for concealed damage. Immediat
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6. HLZ MODEL/COMPONENT IDENTIFICATION Heated air flows Heater from the air Plate/Landing heater/blower Zone and heat rises from the heater plate. Heater Plate Calibration Socket Air Heater Calibration Socket HLZ Computer Power Cord A look at the flow of heated air around the HLZ Blower Assembly Heater plate Heater Plate Air Heater Frymaster L.L.C., 8700 Line Avenue 71106, P.O. Box 51000, Shreveport, Louisiana 71135-1000
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7. HLZ COMPUTER OPERATION AND PROGRAMMING Display Air Heater Heater Plate Temperature Temperature Switch (4) Switch (1) ON/OFF Switch Check or Program Switch Down Switch (2) Up Switch (3) 7. 1 Programming Temperature You are able to program the setpoint temperature of both the air heater and the heater plate via the computer interface. The heater plate factory default is set to the McDonald’s standard of 160 °F. The air heater factory de
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Display reads SET, and LED’s light. Press to program the heater plate or to program the air heater. Press the Up and Down Arrow Keys to achieve the desired set-point temperature, then press the Check Switch once. Both heater LEDs will again light. Press or to get desired setpoint, then press to lock the temperature in. If you are finished with programming both heaters, press the Check Switch again to store the programmed setpoints and exit the programming mode OR to
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Press to turn on the computer. The display will read — LO — until both heaters are within 15 °F of setpoint NOTE: A small LED will light in the display when either the heater plate or air heater is energized. Air Heater ¡ R E d y Heater Plate When the HLZ is ready for operation, the display reads REdY (ready). Place product in the HLZ in accordance with the restaurant’s established procedures. NOTE: To check the actual temperature of a heater, press the correspondi
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8. Operator Troubleshooting Guide Symptom Possible Cause No power Circuit breaker out No computer display; no flow from Low voltage air tower Bad fuse Bad transformer Hi-limit out Bad latching relay No flow from air tower RTD probe has failed. Isolate failed component by checking temperature of air and heater plate with the temperature display keys on the computer. The plate After 20 minutes of operation temperature should be within ± 15°F of computer display shows PROB
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9. SERVICE INFORMATION 9.1 PARTS LIST Relay, Latching 807-3021 Description Part Number Blower, 230V (CE) 807-3691 Transformer, 807-0979 Blower, 208V/240V 807-3637 208V/240V/12V Hi-Limit 807-3631 Transformer 230V (CE) 807-3185 Fuse Block 807-2820 Air Heater, 208V 807-2945 Fuse, 20A 807-2819 Air Heater 230V (CE) 807-3630 Cordset, Twist Lock, HLZ 807-3020 Air Heater, 240V 807-3011 Cordset, CE 807-1696 Shield, HLZ Heater 900-8486 Cordset, Japanese 807-3419 Air RTD Probe 8
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9.3 Repair Procedures 1. Accessing the interior of the HLZ (Set up for testing): a. Disconnect power cord from outlet. b. Turn unit on its side. Remove the five access screws located on the bottom of the unit. c. Then set the unit back down on its base. Place paper towels on the heater plate to protect it from The cowl assembly is held on by five scratching. Remove the cowl assembly and lay the screws, which are removed from the cowl on the heater plate while trou
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9.5 Opening the Air Delivery Tower: a. The air thermocouple and air RTD are located in the air delivery tower. To access them, the front air delivery assembly must be removed. b. Insert a 5/16” nut driver Components in the rear tower are accessed by loosening two nuts, one through the front air under each end of the overhang. delivery assembly access holes and turn the nuts counterclockwise to loosen. Do not remove the nuts. Grab the bottom flange of the front
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g. Go to step 9.3.2 and reassemble the air delivery tower. 9.7 Accessing the Plate and Air Heaters: a. Use the following method to remove the plate heater assembly or access the compartment underneath the plate heater. b. Remove the cowl assembly per steps After cutting the acrylic adhesive between the 9.3. heater plate and the HLZ chassis, use a screwdriver to gently lift the heater plate. c. Then remove the air delivery assembly following steps in 9.5. d. Ins
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9.8 Replacing Hi-limit a. Follow steps in Accessing plate and air heaters, 9.7. b. Remove the shield over the air heater c. Remove the brace on the left side of the base assembly, exposing the wire raceway. d. Remove the grommets the hi-limit wiring passes through. e. Remove the existing hi-limit and pull wiring through cabinet. The wires for the hi-limit are routed through the hole used by the RTD wiring. Slip the wires into slot f. Mount the hi-limit on the the sp
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9.9 Reinstalling the Cowl Assembly and Air Delivery Assembly/Gasket Installation a. Cowl Assembly: 1. Clean surface area thoroughly. 2. Remove any old adhesive. 3. Apply a new gasket to bottom edge of the cowl assembly. Apply gasket or sealant along this edge 4. Test fit the cowl assembly to see if a gap is visible once the cowl assembly is properly seated. If a gap remains, apply a second gasket to create a better seal. 5. Plug in the computer harness and
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10 Diagnostic Tests for HLZ 10.1 Relays 4 4 2 2 The following tests are conducted with power applied. 1 1 Symptom: Air heater or plate heater will not 3 3 heat. Symptom: Air heater or plate heater over heats. NOTE: Unit will display PROB if overheated. The probes are producing out of range resistance. Allow unit to cool before Viewed from the front of the HLZ, the air heater relay is checking probes. nearest the heater plate; the heater plate relay is nearest the
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Output power • With the computer plugged in and turned on, check for 14VDC from pin 5 on the computer terminal to ground. Resistance Chart 10.3 Transformer Centegrade Fahrenheit Ohms 21 70 1080 Symptom: Unit has no display 27 80 1101 32 90 1122 Test: 38 100 1143 43 110 1164 • Line voltage should be measured across the 49 120 1185 input side of the transformer; 12VAC should be 54 130 1206 60 140 1226 measured across the output side. 66 150 1247 71 160 1268 10.4 Plate H
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10.6 Plate Heater Symptom: No heat when voltage is applied. Symptom: Overheats Tests: • With power removed from the HLZ , measure resistance between terminal 4 (white wires) on the latching relay and terminal 4 on the plate heater relay. The reading should be 215 to 230 ohms on an HLZ 18; 150-180 ohms on an HLZ 22. Also, check for continuity to the chassis. Resistance seen there indicates a chaffed or shorted wire. 10.7 Air Heater Symptom: No heat when voltage is applied.
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• Remove power from unit. On 208V units, disconnect black and white wires connecting blower to heat and latching relays. The resistance between the wires should be between 55 and 65 ohms. • Remove power from unit. On 240V units, disconnect red and white wires connecting blower to heat and latching relays. The resistance between the wires should be between 62 and 72 ohms. 10.10 Hi-limit Symptom: No display on controller. Test: • The hi-limit is in the 12-volt output from th
