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1. After the wax has been removed you may load the furnace SPRUE HOLE UP or use our WWT13 or WWT18 Grate & Tray and the sprue holes can remain down. REMOVE WAX TRAY AT END OF FIRST HOUR. To start this program, see instructions below. The program begins with a slowly rising temperature from ambient to 1350 ° °°°°F (730 ° °°°°C) which requires approximately 8. hours. The program then holds that temperature for 2 hours, and then reduces to a casting temperature of 900 ° °°°°F (480 ° °°°°C) and holds for 5 hours. Total time is 15 to 16 hours depending upon your load in the furnace. ENTER PROGRAM NO. 3 [ 12 Hr ] AS FOLLOWS: ACTION DISPLAY 1) Apply Power [ ldLE ] alternating with current furnace temperature 2) Press “1” [PROG] alternating with [EL} 3) Press “3” [12 HR] 4) Press “ENTER” [ ldLE ] alternating with current furnace temperature. Program saved. 5) Press “ENTER” [STRT] The furnace starts firing cycle. 13 We feel that our 12 hour program ( No. 3 ), which is permanently programmed into your controller, is the best and most useful program for the average casting operation. You can load your furnace at 3 - 4 or 5:00 P.M. in the evening and arrive at 7 -8 or 9:00 A.M. and cast. Many casters prefer to load and cast in a 8 hour workday. We also have a 5 hour program (No. 2) that has worked well for many years with flasks no larger than 4" to 5". Also, you have the option of creating your own custom programs into the programmer (up to 6 different programs). This is discussed on pages 11, 12 and 13. Again, during the first hour of all programs the operator should be in attendance to remove the melted wax from the wax tray which you should have on the floor of your furnace. This will do two things. First, it will eliminate the odors and fumes created from the wax elimination, and second, extend the life of the heating elements. The ventilation hole(s) at the top of the furnace must remain open during this hour. After emptying wax from tray, replace the flasks with the sprue hole up, or use our WWR13 or WWT18 Grate & Tray, then leave sprue hole down. After burnout is complete, casting can be done. Once casting is complete, turn off furnace by pressing STOP button. If you have not completed casting by the end of the final holding time, the programmer will turn off. PROGRAMMING A DELAY FIRING [ dELA ] Regardless of the program that you run (either built-in or custom), you can insert a delay period before the firing profile begins. This will allow you schedule the start of the program such that you can cast upon your arrival. The only requirement is to have eliminated the wax either by the furnace with PROGRAM NO. 1 or by Steam Wax Elimination. Upon entering the desired program you are going to run (either permanent or custom) and you reach the final step of displaying [ IdLE ], press DELAY START (3). The display will alternately show [ dELA ] and [ 00.00 ]. At this time you enter the amount of delay time you wish before the furnace begins the burnout cycle (EXAMPLE: You program at 4:00 P.M. and you want a 5 hour burnout (PROGRAM NO. 2) and you wish to cast at 8:00 A.M. - The delay entered is 11 hours [ 11.00 ] - This starts the furnace at 3:00 A.M. and you are ready to cast at 8:00 A.M.). You can enter a delay start time up to 99 hours. After entering your delay start time press ENTER twice. After doing so, you can see the timer in operation and counting down until the delay time entered has expired and the furnace begins the selected burnout program. 14 ENTERING A CUSTOM PROGRAM REMEMBER - ALL PROGRAMMING BEGINS WITH [ ldLE ] ON THE DISPLAY Putting a program into your controller is the easiest way to understand its function. Lets us begin with an 8 hour program. We use a slow steady rise in temperature to a maximum of 1350 ° °°°°F (730 ° °°°°C) in all programs (this is suggested by most investment manufacturers); then reduce the furnace temperature down to a casting temperature slowly. Since we only have 8 hours, we will use smaller diameter flasks. We will program in 3 segments. You can program up to 20 segments if necessary. SEGMENT 1 We will heat the furnace at a rate of 1250 ° °°°°F (680 ° °°°°C) per hour to a temperature of 300 ° °°°°F (150 ° °°°°C) and hold for 1 hour (this is our wax elimination cycle) -NOTE: OPERATOR ATTENDANCE IS REQUIRED. SEGMENT 2 We will then raise the furnace temperature to 1350 ° °°°°F (730 ° °°°°C) at a rate of 280 ° °°°°F (136 ° °°°°C) per hour (requires approximately 4 hours) and then hold at 1350 ° °°°°F for 2 hours. SEGMENT 3 We will then lower the furnace temperature to 900 ° °°°°F (480 ° °°°°C) for our casting temperature. We will program a 14 hour hold time for this temperature in case the operator is not ready to cast at the end of the 8 hour period. NOTE: YOU CAN PROGRAM ANY FLASK CASTING TEMPERATURE YOU WISH. WE FIND THAT 900 ° °°°°F IS A GOOD TEMPERATURE FOR CASTING 14K YELLOW GOLD IN MOST INSTANCES. DELAY START: You can also delay the start of the program if you wish (see ...

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