!CAUTION
You must purge the system of air before the heating cycle.
Personal injury and system damage can occur from a pressurized system.
6.Air and Oil will be vented through the automatic
7.After the unit stops requiring more oil and has at least 5 psi of pressure, open the Return Valve half way. If the
8.Once the unit has stopped requiring more oil again and has at least 10 psi of pressure, select a set point of 100°F (38°C) and switch unit into the "Auto" mode. As the oil warms up, viscosity will decrease, and the pressure will fall.
9.In
10.If any water is present in the system, it must be boiled off before continuing operation. Select a setpoint of 215°F (102ºC) and observe the reservoir tank vent for any signs of escaping steam. Continue to run at 215ºF (102ºC) until no more steam appears and pressure has stabilized. Restart the Blow Off cycle as necessary if it times out.
11.When fluid level has stabilized and air and water are purged from the system, open the Return Valve all the way. And select a setpoint of 250°F (121°C). Restart the Blow Off cycle as necessary if it times out.
12.If the fluid level and pressure remain stable allow the
With the system properly purged, only 4 - 6" of fluid should be visible in the sight glass. This will allow for expansion of the fluid as it heats, as well as capacity for process fluid when the pump is reversed and fluid withdrawn from the mold.
The 6017 is now ready for use. All that is required is to select a process set point on the controller as described in the controller manual.
NOTE: If all traces of water are not removed from the system, severe cavitation may occur at elevated temperatures. Indications are a “gravely” sounding pump, fluctuating or dropping pressure, or rapidly rising fluid level in the expansion tank. Repeat Steps
6017 Series Hot Oil Large Temperature Control Units | Page 31 |