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Page 50 6017 Series Hot Oil Large Temperature Control Units
6-3 Draining the Unit for Storage
You should thoroughly flush and drain the 6017 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. Sterling, Inc. recommends
SterlFlush™ flushing fluid or equivalent for flushing your 6017
unit; follow unit flushing instructions that comes with SterlFlush™
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.
6-4 Corrective Maintenance
Pumps and Seals
Each 6017 unit is completely tested and calibrated before leaving
the factory. The unit is then cooled, drained, and packed for
shipment.
If the unit stands idle for a long time before being installed in your
factory, gaskets can dry out and possibly leak when you start the
unit. In most cases, these gaskets soon swell and form a tight seal.
If not, you may need to tighten the bolts to stop the leak.
Similarly, rough handling in shipping may sometimes cause minor
leaks upon startup; you may need to re-tighten bolts or fittings
to stop the leak.
You should expect to periodically adjust the packing or replace the
pump seal. If the pump is properly lubricated and used at moderate
temperatures, the seal should last several years. The following
section describes the proper procedures for replacing the seal
Periodic replacement of the pump drive V-belt is also to be
expected.
Note: If the pump motor wiring is disconnected for removal from
the unit, you must check the actual direction of rotation
when the motor is rewired to the unit.