How can I set Heat exchanger fluil-to-fluid supply side outlet temperature?

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I using primary and secondary loops to provide cooling in my case. A heatexchanger:fluidtofluid is used to connect these two loops. The problem is that the primary loop, which contains water/glycol as the working fluid, cools the heat-exchanger with a supply temperature of -4. I don't want that heat-exchanger outlet on the supply side of heat-exchanger flow the negative temperature. Because the fluid in the secondary loop is pure water. I'm using an ideal heat exchanger.

The green temperatures are my desired temperatures and the red ones with plenty of error are ones that I get!