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AEC/Appflcatlon Engineering
6-2
Periodic Checks
Daily
•
Check all connecting lines, hoses, and connectors for wear or damage.
Monthly
•
Check for leaks developing at the pump seal, gaskets, etc.
•
Check the pump drive V-belt for wear.
•
Check the reservoir
tank
vent for any obstructions.
Every Three Months
•
Check heat transfer fluid for deterioration. If fluid is noticeably darker in color, or viscosity
has increased from 20% to 25%, drain the system and replace the fluid. Severe damage may
occur from using degraded fluid. See Section 6-3 below for more information.
Note: Under normal conditions, heat transfer fluid should last 18 to 36 months.
Every Six Months
•
Inspect electrical connections for secure attachments and secure ground connections.
Inspect the power cable, especially at the entrance point to the electrical enclosure. A
qualified electrician should perform this inspection.
•
Check pump, motor, and heater flange bolts for proper tightness.
•
Remove the heat exchanger tube bundle and check for lime/mineral deposits. Clean if
required.
6-3
Draining
You should thoroughly flush and drain the TDH unit if you need to take it out of service for a
long time, or if you expect it to become exposed to freezing temperatures. AEC, Inc.
recommends TrueFlush™ flushing fluid or equivalent for flushing your TDH unit; follow unit
flushing instructions that comes with TrueFlush™ flushing fluid. Drain plugs are provided at the
base of the heater
tank,
reservoir tank, and on the pump. You should also remove, drain, and
reinstall the heat exchanger tube bundle before storage.
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TOH True Temp"' Serles Hot Oil Temperature Control Units
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