boiler fails , or any other leak ? Well at 10 gpm you can put a lot of water on the floor in no time at all . So , years ago I was taught this great trick and I ’ ve gone on to teach it to thousands .
The common way for
Figure 7 many is to power terminals 3 and 4 by placing an insulated # 14 wire to act as a jumper across the pass between terminals 2 and 3 , as shown in Figure 3 . The danger with doing this is if a pipe breaks it may flood the customer ’ s boiler area . A simple trick is to add a stripped # 18-gauge thermostat wire between these two terminals , Figure 6 . This bare wire can only carry between three to six amps . With both the burner and feeder running , your amperage draw is about two to six amps , so within a short time the amperage
Figure 8 draw will burn out the wire . In my neighborhood it ’ s what we call “ the Boston trick ”. Essentially , you have a thermal link or fuse ! That fuse will fail in about 30 to 40 seconds and instead of a flooded boiler or basement you only have
Figure 9
between five or six gallons to mop up . You should be able to use this trick with most of the electronic feeders , Figure 7 , now on the market , just check with the OEM to be sure . But , with the ability to tailor the feeders of today for the ‘ delay ’ and ‘ time ’ to fill I don ’ t really think you ’ ll need to do this .
Finally , for those of you still replacing Watts N89D low-water cutoff switches , Figure 8 , t h e trick can also be used as shown in Figure 9 . Thanks for reading this and see ya ! l FON
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