I have a Titan N120 instant hot water heater that has been driving me nuts.
It continues to fry the SCR's and I believe that the controller board is at fault. This is a very small surface mount board and I'm definitely not digging into that. What I'd like to do is to find a schematic for a design where I can build it out of discreet electronic components. I'd like to stay with the original hardware design, but I don't quite understand the dual S6065J SCR's where one is wired hot lead to Anode and the other is hot lead to cathode. They are soldered in sets, so there must be a reason, possibly each works off a half wave?? The hardware is pretty basic except for the board.
The unit has a simple magnetic reed switch sensing the water flow and a thermal overheat breaker and a temperature probe. One side of the 240AC power goes thru the SCR's and into two 5500 watt coils and back thru the overheat breaker to the other leg. The gate signals come from the board. If anyone knows of a schematic that will make use of the present hardware, it would be sincerely appreciated. Titan is a terrible outfit to try to get any help from. They promise to ship and never do. After a month of cold water I'm going to build a controller board myself. I've got a ton of circuit parts in the shop and plenty of experience with AC, I just need a simple control circuit that can be hand built with TTL/CMOS or simpler components..
Right now I've got one side of the coils wired directly from the 60A knife switch panel and start the water running before I close it so we can take showers. It's a pain, but this time of year the water is cold, brrrrr!
Thanks, Dick
It continues to fry the SCR's and I believe that the controller board is at fault. This is a very small surface mount board and I'm definitely not digging into that. What I'd like to do is to find a schematic for a design where I can build it out of discreet electronic components. I'd like to stay with the original hardware design, but I don't quite understand the dual S6065J SCR's where one is wired hot lead to Anode and the other is hot lead to cathode. They are soldered in sets, so there must be a reason, possibly each works off a half wave?? The hardware is pretty basic except for the board.
The unit has a simple magnetic reed switch sensing the water flow and a thermal overheat breaker and a temperature probe. One side of the 240AC power goes thru the SCR's and into two 5500 watt coils and back thru the overheat breaker to the other leg. The gate signals come from the board. If anyone knows of a schematic that will make use of the present hardware, it would be sincerely appreciated. Titan is a terrible outfit to try to get any help from. They promise to ship and never do. After a month of cold water I'm going to build a controller board myself. I've got a ton of circuit parts in the shop and plenty of experience with AC, I just need a simple control circuit that can be hand built with TTL/CMOS or simpler components..
Right now I've got one side of the coils wired directly from the 60A knife switch panel and start the water running before I close it so we can take showers. It's a pain, but this time of year the water is cold, brrrrr!
Thanks, Dick