Recommendation for powder coating oven
A. PID controller.
1) SYL-2342 Most people use this controller. It can be used to drive either a contactor or a gas valve.
2) SYL-2362 This controller can also be used. It controls a SSR which will relay the power to the heater
3) SYL-24X1 This PID controller has built-in timer function w/ 8 different timer modes.
B. Temperature sensor.
TC-K3MM The base of the probe is made of a 0.55" (15 mm) long 5/16"-24 screw for easy mounting.
WRNK-171 This is the most commonly used sensor for this application.
TC-K6A2 Some people like to put sensor close to the parts. This sensor can be used.
C. Relay (contactor).
Most people use 240VAC line voltage. Here is the one to use. Each one can drive up to 8kw at 240V. The controller can drive more than 10 contactors in parallel.
Please note, external relay (or contactor) is not needed for gas heated oven. The controller internal relay can drive the gas valve directly.
Other options. These are the options which we only knew few customers did.
1) Use SSR instead of contactor. SSR will provide a more precision control. But it needs heat sink to remove the heat generated from the SSR. This is easy for oven that draws less than 20A of current. Because most power coating oven requires more than 60 Kws heater, it makes heat removal more difficult. A cooling fan might be needed to blow over the heat sink. When use SSR, you need a controller with SSR control output. Either our SYL-2352 or the SYL-2362 can be used.
2) Some people put a timer in the control loop. They use the alarm to activate the timer when temperature reaches the alarm setting. When timer reach finished, it will turn off the contactor to shut off the system.
D. Breaker Switch for main power
1) SWM-DR It can not only offer reliable high current handling but also protections on both circuit-overload and short circuit.
2) SWM-DR-C It can not only offer reliable high current handling but also protections on both circuit-overload and short circuit.
Please click here for information on how to select the correct circuit breakers and the difference between SWM-DR and SWM-DR-C.