Trouble shooting Cress kilns
Wondered if anyone has had trouble with cress kilns not powering the coils and what the most likely cause would be. I bought a Cress FTX 23 UP and I have trouble believing both relays are dead since I can't get any coils to heat up. (Can't even find the "UP" designation in the schematics they heve) How likely is it going to be the firemate A-D switch? Or is it possible the thumbwheel advancement which increases power has failed? have never found a schematic on either one of these to see how the
The "magic" lies in the infinite switch below the thumbwheel
from INSTRUCTIONS FOR CHANGING THUMBWHEEL SWITCH OR MOTOR https://tinyurl.com/yc2bxy22
The shaft on the switch is turned
- by the thumbwheel for manual control
- by the motor for automatic control
When the shaft is turned to full on the mains passes through the switch unimpeded ...
At lower settings the mains passes through in bursts ...
Effectively allowing a continuous range of duty-cycles (the fraction of time