Connecting heat pumps to gas furnace. Fr

by John
(Amherst, ma. )

I have 5 Mitsubishi heat pumps msz-fh09na. How do l connect them to my gas furnace so that when the temperature drops to 40 degrees, the heat pumps go off and the furnace comes on; and then when the temperature rises to 41 degrees the furnace goes off and the heat pumps come on.