I have a circuit that has two 10watt heaters and one 20watt heater all wired in parallel and hooked up to a dc power supply. the heaters are kapton flexible heaters made by Omega: KHLV-101/10-P KHLV-0504-10-P the manual for these can be found here: http://www.omega.com/manuals/manualpdf/M1249.pdf these heaters are adheared to solid copper and i would like to provide the correct voltage or current. The manual specifies the voltage to be 28 volts, but it does not say that this is the maximum voltage or operating voltage, or what. Does this mean that i should apply 28 volts to the power supply? What happens if I apply more or less? I don't want to damage these heaters. Any help would be great.