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

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

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

4. 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.

5. Air RTD
Air Thermocouple
Relays
Fuses

6. Blower Assembly

7. Air Heater

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

9. 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.

10. 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.

11. Press Check to lock in changes.

12. 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.

13. 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

14. The blower should be oiled twice annually in these ports.