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Calibrate HLZ
Why
To ensure correct holding temperature and accuracy of computer controls
Time required
20 minutes to prepare
Time of day
During low-volume times
Hazard icons
Tools and supplies
Pyrometer with dual
male connectors
Procedure
1
Make sure HLZ is clean and at
proper operating temperature.
Make sure the HLZ is clean
and has been turned on for at
least 20 minutes. The display
should read "REdY".
2
Plug pyrometer connector into
"AIR" receptacle on HLZ.
The HLZ is hot.
3
Read and compare air
temperatures.
Wait 3 minutes for the py-
rometer readout to stabilize.
Press the heater temperature
switch once to display the
HLZ air temperature readout.
Compare the two temperature
readings. If the two tempera-
tures are more than 15°F
(9°C) apart, contact your
Factory-Authorized Service
Center.
Semi-annual
10 minutes to complete
For 24-hour restaurants: During low-volume times
4
Plug pyrometer connector into
"PLATE" receptacle on HLZ.
5
Read and compare plate
temperatures.
Wait 3 minutes for the py-
rometer readout to stabilize.
Press the heater temperature
switch once to display the
HLZ plate temperature read-
out.
Compare the two temperature
readings. If the two tempera-
tures are more than 10°F
(5°C) apart, contact your
Factory-Authorized Service
Center.
©McDonald's Corporation · Planned Maintenance Manual · Revised July 2007
PR 10 S1
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