Just hooked up dairy barn to wood stove, only getting 120 degrees

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We just hooked up ort barn to out wood stove, it only heats the water. We also installed a plate heater as well. But the temp is only getting up to 120 degrees with the stove water is set to 190. We was told that the plate heater we bought should do the job just fine. We also have the wood stove hooked up to the house which heats the water and the house as well.

Here is a pic of out setup. Maybe we have something hooked up wrong.


We ran about 80 feet of that insulated pipe to the barn. I will have to check on how much we have ran to the house. It will probably be a little less.