Sterlco Midsize - Manual (Page 23)

Portable Hot Oil Temperature Control Units Page 23
Chapter 4: Startup Preparations
4-1 Starting the Unit
Unit Start-up (With Autovent Solenoid)
The highly engineered controls and controller make this unit almost self operating. Before
you can begin heating, it will be necessary to perform the following start up procedures. This
will ensure that all air is vented from the system to prevent fluid degradation and damage to
the heater.
1. Add fluid to the reservoir tank until the level is near the top of the
sight glass.
2. Depress the "Pump Start" button to start the pump. Check motor
rotation by observing the pressure gauge. If the gauge indicates
positive pressure, rotation is correct. If not, disconnect power and
reverse the incoming power leads.
3. As fluid is drawn out of the reservoir tank to fill the process, the fluid
level will fall in the tank. Continue to add fluid to maintain the level
about 4 inches from the bottom of the sight glass.
4. Air and Oil will be vented through the Vent Solenoid and into the
reservoir tank.
!
CAUTION
You must purge the system of air before the heating cycle.
Personal injury and system damage can occur from a pressurized system.
5. 2 minutes after the unit has built at least 5psi of pressure, select a set
point of 100°F and switch unit into the "Auto" mode. As the oil
warms up, viscosity will decrease, and the pressure will fall.
6. With 2 minute intervals increase the setpoint to 150 and 200°F.
7. If any water is present in the system, it must be boiled off before
continuing operation. Select a setpoint of 215ºF (102ºC) and observe
the reservoir tank vent for any signs of escaping steam. Continue to
run at 215ºF until no more steam appears and pressure has stabilized.
8. When fluid level has stabilized and air and water is purged from the
system, allow the vent timer to run out.