Dayton Operating Instructions and Parts Manual
Model 4E769B
Maintenance (Continued)
3.Use pliers to remove the fan nut from front of motor shaft (See Figure 12).
Fan Nut
Figure 12 - Removing Fan Nut From Motor Shaft
4a. If replacing fan, remove old fan and discard. Go to step 7 below.
4b. If cleaning fan, remove fan. Be careful not to damage the fan blade pitch.
5.Clean fan using soft cloth moist- ened with kerosene or solvent.
6.Dry fan thoroughly.
7.Place fan onto motor shaft.
IMPORTANT: When placing fan onto motor shaft, make sure part number stamped on fan is facing motor.
8.Attach fan nut to end of motor shaft. Tighten fan nut firmly.
Figure 13 - Replacing Motor and Fan Guard into Heater
9.Place motor and fan guard into rear of heater shell. Make sure power cord is properly located (See Figure 13).
10.Insert three screws through heater shell and into fan guard. Tighten screws firmly.
IGNITOR
1.Remove motor and fan guard from heater (See Motor, page 8, steps 1 and 2).
2.Remove black ignitor wire from piezo ignitor. Access ignitor wire through underside of heater base (See Figure 14). Push wire up through bushing in heater shell.
Piezo
Ignitor
Ignitor Wire
Bushing
Underside of
Heater Base
Figure 14 - Removing Ignitor Wire from Piezo Ignitor
3.Remove ignitor mounting screw from rear head using
4.Remove ignitor from rear head.
5.Install new ignitor. Attach ignitor to rear head with ignitor mounting screw.
6.Run ignitor wire from new ignitor through bushing in heater shell. Attach ignitor wire to piezo ignitor.
Rear Head
Ignitor
Ignitor
Mounting
Screw
Figure 15 - Removing Ignitor Mounting Screw and Ignitor
7.Set gap between ignitor electrode and target plate to .17" (See Figure 16).
Target
Plate
Gap
Area
Ignitor
Electrode
Figure 16 - 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.
Push piezo ignitor button and watch for spark between ignitor electrode and target plate.
9.Place motor and fan guard into rear of heater shell (See Motor, page 8, steps 9 and 10).
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Version B - For Reduction | G016.J |
