If the ohmmeter reads zero or open, the cell should be checked for dirt on the face or shorted leads. If the face of the photocell is dirty, clean with soft cloth and replace. Check for the resistance change in the photocell from no flame to flame. If the cell still reads zero or open check the wiring from one end to the other for opens and across the leads for shorts. If no problem is found replace the cell and check once again for the resistance change. 5. If the photocell and primary safety

CHICAGO 60648 FORM 5S2514 01582 T T 0484/109/1M READ ALL INSTRUCTIONS CAREFULLY BEFORE ATTEMPTING TO INSTALL, OPERATE OR SERVICE THE DAYTON HIGH PRESSURE HEATER! RETAIN INSTRUCTIONS FOR FUTURE REFERENCE. General Safety Information WARNING: • IMPORTANT: READ AND UNDERSTAND INSTRUCTION MANUAL BEFORE STARTING OR SERVICING! • IMPROPER USE OF THIS HEATER CAN RESULT IN SERIOUS BODILY INJURY DUE TO HAZARDS OF FIRE OR EXPLOSION, CARBON MONOXIDE POISONING, BURN, AND ELECTRICAL SHOCK. • USE ON

15. Insert screws through heater shell and into motor mount. Tighten screws firmly. 16. Turn heater on its side to access opening in bottom of base. Connect green wires from motor, transformer, and power cord to heater shell using ground nut (See Figure 5, page 10). 17. Attach black and white wires to terminal board (See Wiring Diagram, page 14, for correct locations). 18. Replace base tray. FAN 1. Remove motor, motor mount, and fan (See Motor, pages 7 and 8, steps 1 through 8) . 2. Clean fan us