Normally-closed solenoid, Asco

Part Number: 8210G95-120/60 (2 way, 3/4 NPT)

• Installation & maintenance instructions, Schematic (.pdf)
• Specifications (.pdf)

This solenoid was added in series with the thermostatic valve on the HPU because it was realized that there is no point in letting cooling water flow after the HPU is turned off. Only the return line is cooled. If the reservoir oil temperature is warm enough to open the thermostatic valve the resulting water flow would not provide cooling in the absence of oil flow (i.e., when the pump is off.) Hence, with a warm reservoir, and without the solenoid, the thermostatic valve would only waste water until ambient air cooled the reservoir oil to the point where the valve would shut off.

The solenoid has to be energized at the same time as the electric motor on the HPU so that the cooling system is operational when the pump is running. (To that end, the solenoid is wired in parallel with the dump valve.)

Supplier

Ascoelectric
Division of Emerson Electric Canada Limited
P.O. Box 160, Brantford, ONT.
N3T 5M8

Last modified: 2006-08-15 Ross Wagner