active sensor leads from ------------------------------------------------- T1F1 air 14 up near mvd plenum air adapter T2F2 air 14 up near mvd volume air adapter T3F3 air 14 just above plenum air return valve H1 air 3 in the air filter housing L1 water 3 in the heat exch. box T4 liquid 7 T5 liquid 7 F4 liquid 4 F5 liquid 4 T11 water 7 T12 water 7 T13 water 7 T14 water 7 T6F6 T7F7 T8F8 H2 L2 T9 T10 F9 F10 T15 T16 T17 t18