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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 using soft cloth moistened with kerosene or solvent. 3. Dry fan thoroughly. 4. Replace fan on motor shaft. Make sure setscrew is touching back of flat surface on motor shaft (See Figure 9). Motor shaft Fan Setscrew Figure 9 - Fan, Motor Shaft, and Setscrew Location 8 Dayton Operating Instructions and Parts Manual Model 3VG80 Maintenance (Continued) 5. Place setscrew on flat of shaft. Tighten setscrew firmly (40-50 inch-pounds). 6. Place motor, motor mount, and fan guard into rear of heater shell (See Motor, page 8, steps 14 through 18). Hub Fan Motor Shaft Setscrew Figure 10 - Fan Cross Section SPARK TRANSFORMER 1. Remove base tray. 2. Locate and disconnect white, black, and orange wires from spark transformer. 3. Remove two screws holding spark transformer to base. Remove sheet metal nuts on transformer and install on new transformer. Discard spark transformer. 4. Install new spark transformer. Position new spark transformer in same manner as old transformer. 5. Connect white, black, and orange wires to new spark transformer. Connect wires to correct terminals as noted in step 2. 6. Replace base tray. Bushing Ignitor Wire Figure 11 - Removing Ignitor Wire from Spark Transformer IGNITOR 1. Remove motor, motor mount, and fan guard (See Motor, page 7, steps 1 through 6). 2. Remove orange ignitor wire from ignitor. 3. Remove ignitor mounting screw from rear head using nut-driver or standard screwdriver (See Figure 12). Figure 12 - Removing Ignitor Mounting Screw and Ignitor Rear Head Ignitor Ignitor Mounting Screw 4. Remove ignitor from rear head. 5. Install new ignitor. Attach ignitor to rear head with ignitor mounting screw. 6. Attach ignitor wire. 7. Check gap between ignitor electrode and target plate. Gap should be .13" to .15" (See Figure 13). Burner Nozzle Gap Area Ignitor Electrode Figure 13 - Clearance between Ignitor Electrode and Target Plate 8. Test for spark. Make sure heater is disconnected from propane supply. Heater could ignite causing severe burns. Plug into extension cord and watch for spark between ignitor electrode and target plate. 9. Place motor, motor mount, and fan guard into rear of heater shell (See Motor, page 8, steps 14 through 18). 9 Version B - For Reduction G016.J ® Dayton Operating Instructions and Parts Manual 3VG80 ® Dayton Propane Construction Heater Accessories Description Part No. Regulator Hose and Regulator Assembly 10' Hose Assembly Fuel Gas Connector LPA2150 LPA3100 LPA1000 LPA4020 Wiring Diagram 100,000 BUT/HR MODEL Power Cord Blue Thermocouple Black Green White Motor Ignitor Orange Blue 1 2 3 4 5 6 87 Thermal Switch Terminal Board Blue Black Ignition ControlWhite Relay Green Green Black Black Green White White Auto Control Valve Figure 14 - Electrical Connection Diagram 10 Dayton Operating Instructions and Parts Manual Model 3VG80 Troubleshooting Chart Never attempt to service heater while it is plugged in, connected to propane supply, operating, or hot. Severe burns and electrical shock can occur. Symptom Possible Cause(s) Corrective Action Fan does not turn when heater is plugged in Heater will not ignite 1. User did not follow installation or operation instructions properly 2. No spark at ignitor. To test for spark, follow step 8 under Ignitor, page 1. Repeat installation and operation instructions. See Installation, page 6 and Operation, page 6 13. If you see spark at ignitor, have heater serviced by qualified service person. If no spark seen: A) Loose or disconnected ignitor wire 2. A) Check ignitor wire. Tighten or reattach loose ignitor wire. See Figure 11, page 9 for ignitor wire location B) Wrong spark gap B) Set gap between ignitor electrode and target plate. Gap should be .13" to .15" C) Bad ignitor electrode D) Bad spark transformer C) Replace ignitor electrode. See Ignitor, page 9 D) Replace spark transformer. See Spark Transformer, page 9 Heater shuts down while running 1. Propane supply may be inadequate 1. A) Refill tank B) Provide additional and/or larger tanks. See Propane Supply, page 5 2. High surrounding air temperature causing thermal limit device to shut down heater 2. This can happen when running heater in temperatures above 85°F. Run heater in cooler temperatures 3. Restricted air flow 3. Check heater inlet and outlet. Remove any obstructions 4. Damaged fan 4. Replace fan. See Fan, page 8 Use only in areas free of high dust content. 5. Excessive dust or debris in surrounding area 5. Clean heater. See Maintenance, page 7 1. No electrical power to heater ...