Can I set the controls to: HI 160 LO 140 Diff 10? I think I read oil burner furnaces don't like to get below 140 for some reason. I have a tankless water heater in my oil fired furnace. I would like to change my settings since I will only be using my boiler to heat DHW. I don't think I need to hold the boiler temp at 200 degrees because I will rarely use my baseboard heat because I have a wood stove that is the primary heat now. I think this will keep my DHW where I want it. If for some reason my thermostat kicks in during the winter, it will only pass 160 degree water through the pipes. I realize the baseboard heat will take forever at 160 degrees, but I really don't need it and it will rarely kick on. Thanks!