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Hatco booster heater typically has 2 sets of thermostats and elements located on each end of heater. Both sides might be controlled by same 60 amp breaker, or the heater might be controlled by two separate 30 amp breakers. Be sure you have correct wire and breaker.
After reading steps on link above, add comment and say if this is new installation, or older installation that suddenly started throwing breaker.
that is in the control cicut the contactor might be bad and taking out cntrl fuse.unhook contactor control voltage by unplugging from contactor tape off the two wires put new fuse in turn on power if fuse does not blow replace contactor.if it does blow you will have to isolate the next thing in the control circut maybe the light.you can buy resetable 1amp circut breakers at grainger for test purposes.sometimes on people I know I will wire in those breakers for them no more buying fuses.
Thanks for your reply. The order in which you connect the wires 1-2-3 does not matter, all three terminal block screws will accept any one of the hot wires from the breaker, one hot wire per each terminal screw.
I beleive that would be fine.the only reason phase would make a difference is if it had a motor in it.If you hook up a three phase mtr and it runs clockwise to make it run counterclockwise all you have to do is switch two of the three legs.If you hook it up 123 ,132,213 it will be fine. just make sure connections are tight and you have a ground.
it might be hard water in the heater. the hard water flakes and when your water heater turns on it creates some movement in those hard water flakes and makes a popping and hissing noise then when it comes to temperature it should stop. the temperature and pressure relief valve shouldn't make this noise. but if you stick your finger in the pipe and it is wet then you might have problems some where else. let me know if it is
Try Rick at Restaurant Parts and More in Ohio. Have model and serial number. He's pretty good at getting stuff like that and he reasonable on prices. I'm in Ga. and I have a 3 day turn around on anything I order from him. He's a straight shooter too. If he can't help you he'll try to find some one who can.
Under normal and regular operation Hatco recommends that the unit be turned on at all times. If the booster heater will not be used for an extended period of time or will be exposed to freezing conditions it should be drained to prevent damage to the unit.