Dayton Heating & Cooling - Page 4 - Recent Questions, Troubleshooting & Support

http://www.fixya.com/support/p1356507-dayton_3e406_open_flame_gas_midsize_heat/usermanual-10B1FF8-PDF

A safety is holding out the main gas valve from opening when call for heat ,check all safety switches to make sure they are closed

The High temperature limit controls how much heat your furnace will deliver. The higher the temperature the hotter the air it delivers. At the same time, the higher the temperature, the hotter the exhaust that is wasted energy. The amount of heat you need relates to outside temperature. Some more sophisticated controls would adjust the high limit to change with outside temperature However, with a fixed limit, the lower the limit the more efficient your operation. If you are looking for maximum efficiency, then you should lower the limit to the point where the fan runs continuously on a cold day. If the fan shuts down, it means that you are making more heat in the furnace than you need. You might want to change the high limit to be higher in the colder part of the winter when you need maximum heat, and then lower it when the outside temperature worms up. If you are getting adequate heat at 150 Deg. you should not go higher, because the higher the limit, the lower the efficiency and the greater the stress on the furnace.

https://www.justanswer.com/uk-plumbing/4xp50-drayton-wireless-system-digistat-scr-alarm.html

No.

I am seeing that this tstat says it handles 24-277 volts but when specs are pulled this tstat is a high voltage tstat. Obviously it could be done but what you really need is a simple 24 volt tstat wired to r and w. You can also get a tstat that doesnt have batteries if you wired in the C terminal.

Doesn't matter, both work correctly. This is for looping the wires through, but both are connected internally.

Usually the nutural is in the power cord box beside the hot. The ground is also there but is a screw that you fatsen the ground to

if its a dual setup no if it was changed out before than yes need different valve unit

try dayton or online search using make and model

check motor /pump working or needs reset