Just purchased the unit. The question is where to place the probe as we use a heat pump heater – heat sensing issue? Would it be best to locate the sensor before the bypass valve? If this is an issue what solutions can be suggested? The overall flow is 55 GPM and a bypass valve directs 45 GPM to the heater via the bypass valve. Would we need to run the return from the heater to a location after the SWG? The only problem I see with that is there may not be enough GPMs going to the SWG. The bypass could be turned down to 35 GPM, thus giving 20 GPM to the SWG. Or does one place an inline heat probe and adjust the control unit for the variance?