McDonald’s Heated Landing Zone The HLZ is designed to hold wrapped sandwiches while the meal order is completed

Five screws on the bottom of the unit secure the controller tower.

Nuts holding the air tower diffuser in place should be loosened, not removed when dismantling the unit.

The sealant on the seam of the heater plate must be cut prior to prying the plate off of its adhesive backing. Remove the plate when the unit is hot; the adhesive will be more pliable.

Air RTD Air Thermocouple Relays Fuses

Blower Assembly

Air Heater

Check temp. of heater plate / adjust setpoint Check temp. of air heater / adjust setpoint ON/OFF Programming switch Adjust setpoint

The setpoint for the plate and the air heater can be changed: With the unit off, press the Check button and then buttons marked 1,2,3,3 in that sequence.

SET will be displayed. Press 1 to adjust heater plate; press 4 to adjust air temp. Use UP (2) and DOWN (3) arrow keys to adjust setpoint.

Press Check to lock in changes.

The reliability of the HLZ’s temperature readouts can be checked The reliability of the HLZ’s temperature readouts can be checked. Test ports are positioned on the unit’s front panel, which allow independent measurement of the heater plate and air heater’s temperature. A variance of ± 50F between readout and meter is acceptable.

HLZ Wiring Diagram 12V LOAD COM 208/240V FUSE BLOCK POWER CORD WHT BLK GRN/Y 240V OPTION (CAP UNUSED WIRE W/MALE PUSH-ON) PLATE HEATER AIR HEATER GRN RED BLOWER TOP PLATE THERMOCOUPLE (TYPE K) BOTTOM AIR HEAT RELAY PLATE HYPOT TEST POINT + LATCH 1 8 6 4 2 AIR THERMOCOUPLE (TYPE K) COMPUTER TEST RED WIRE NEGATIVE PLUGS 7 9 12 3 5 14 11 13 15 10 BRN RTD AIR RTD 208V OPTION

The blower should be oiled twice annually in these ports.