Hi all. Can anyone please clear this up for me regarding the plumbing of the Thermostasis unit P6-H-190 as it is driving me potty!
The instructions that come with the unit (see pic 1) have the oil routing from the sump/ tank connected to the lower port of the Thermostasis unit. The oil routing the pump is connected to the upper outlet port of the unit. Depending on whether the thermostat is open or closed the majority of oil flow will either flow via the bypass (bottom to top), or route via the cooler. I get this.
However another set of instructions for the same unit which also shows the internal components (see pic 2) shows the unit plumbed 'upside down' (Ie. Oil from tank routes to upper port and oil to pump routes from the lower port therefore bypass oil flows from top to bottom within the unit).
Looking at the unit itself and its internal construction (see pic 3) it seems to me that the second set of instructions should make more sense because if the oil is routed from the tank to the lower port there is no restriction to flow rate to reduce oil flow to the cooler and instead encourage oil to flow up and through the bypass valve. The lower bore is straight through with no obstruction.
If the oil tank is indeed connected to the lower port as per the instructions that come with the unit is the oil from the tank encouraged to flow upwards through the unit and the oil bypass to exit via the upper port to route to the pump merely due to the effects of lower pressure/ suction from the returning oil flow above?
I want to understand the reasons why there are two seemingly conflicting ways of plumbing this unit and what the effects are of each method with respect to operating temperatures.
I have seen many photos of different installations and they pretty much all have the oil tank routing to the lower port.
Can anyone help?
