2017_E_TYPE-HL.doc Page 37 of 55 24-Oct-2017
8. A slow cool down rate can be achieved by keeping doors shut. Keeping the doors
slightly open will accelerate cooling. The system switch should be left ON to monitor
temperature during cooling.
5.3 Parts
1. Aluminum parts should always be processed below 600
0
F. The recommended operating
temperature range is 500 - 525
0
F. For automotive heads made of aluminum, the
processing temperature should not exceed 600
0
F.
2. Parts coated with Epoxy paint should be processed with a reduced process burner setting
for slower heat up. In some cases, it may be necessary to use a ramp and soak profile.
3. Special parts such as water-jacketed stators or other components with internal enclosures
must be processed with care. All enclosures must be opened before processing in the
oven.
4. Electric motors with aluminum housings should not be stacked.
5.4 Emissions Control
Stack emissions should be checked regularly to ensure that the oven is operating
properly. A plume emission indicates that the oxidizer chamber air supply or oxidizer chamber
burner setting should be adjusted. A flame emission from the stack is abnormal and should be
corrected immediately by properly adjusting the oxidizer gas valve.
There should be no visible smoke. If stack emissions are dense and black due to
incomplete combustion, the oxidizer gas flow setting may be adjusted.
Oxidizer gas flow adjustments may be made while processing a load as follows:
1. Mark and maintain gas flow valve adjustments used on both burners.
2. The oxidizer airport should be locked in position for the full burning cycle.
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