hi folks! someone wise pointed out that my early '80s heater has no fusible link in its millivolt circuit. OK, i thought, that's easy enough to add for extra peace of mind. i bought a "Jandy Laars Pool Heater Fusible Link Assembly R0012200". one thing it says on the side is "152C", so perhaps that is the fusing temperature. now: where to put it. i ask: in gas heaters that came with such fusible links, where are they mounted?