29. Ignition | Ignitor - Refer to FIGURE 18 and locate the ignitor. Disconnect the wire; re- | ||
move the screw and the ignitor. Clean the ignitor assembly with an emery cloth. | |||
System | |||
Spark gap must be maintained to 1/8". See FIGURE 20. | |||
(cont’d) | FIGURE 20 - Ignitor |
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| showing required |
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Ignitor | Spark Gap | 1/8 inch | |
measurement | (3.2mm) | ||
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| IMPORTANT: When | ||
| to the ignitor. |
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| CAUTION: Due to high voltage on the spark wire and electrode, |
| do not touch when energized. See Hazard Levels, page 2. |
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Flame Sensor | Flame Sensor - Refer to FIGURE 18 and locate the flame sensor. Disconnect the |
| wire; remove the screw and the flame sensor. Clean with an emery cloth. |
30. Fan Motor, | Remove dirt and grease from the motor, the fan guard, and blades. Use care when | ||||||||||||
cleaning the fan blades to prevent causing misalignment or imbalance. Check that | |||||||||||||
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| Fan Blades, | |||||||||||
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| the hub of the fan blades is secure to the shaft. | |||||||||||
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| and Guard | Follow these instructions for replacement of the fan guard, fan motor and/or fan | ||||||||||
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| 1. If the heater is installed, turn off the gas and disconnect the electric power. | ||
| FIGURE 21 - Fan Blade | 2. Open the access door and disconnect the fan motor wires, capacitor wires at the | |||||||||||
| Position on the Shaft | capacitor, and ground screw. | |||||||||||
| 3. Remove the assembled parts (the fan guard, the motor and the fan blade). | ||||||||||||
| Dimension A |
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| 4. Disassemble and replace whatever parts are needed and reas- | |||
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| 30 | 1 | 25 |
| Fan |
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| 45 | 9/16 | 14 |
| Blade |
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| 60 | 38 |
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| Fan | Be sure the fan blade is in the proper position on the shaft; refer to | ||
| 75 | 54 |
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| Motor | the illustration and table in FIGURE 21. | ||
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| 100 | 60 |
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| Position the assembly on the heater. Attach the fan guard. | ||
| 125 | 59 |
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| Rotate the fan blade to check for adequate clearance. If adjustment | ||
| 150 | 60 |
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| 175 | 54 |
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| 200 | 67 |
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| 250, | 2 | 51 |
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| 300 |
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| 350 | 48 |
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| 6. Restore power to the heater and turn on the gas. Light, following the instructions | |||
| 400 | 35 |
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| on the lighting instruction plate. Check for proper operation. | |||
31. Venter Motor | Remove dirt and grease from the motor casing, the venter housing, and the venter | ||||||||||||
wheel. Venter motor bearings are permanently lubricated. Follow these instruc- | |||||||||||||
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| and Wheel | |||||||||||
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| tions for replacement of the venter motor and wheel assembly. Keep all hardware | |||||||||||
| Replacement Instructions | removed to be used in | |||||||||||
| 1. Turn off the gas and disconnect the electric power. |
2.Open the burner/control compartment access panel.
3.Disconnect the three venter motor wires at the DSI control, capacitor wires at the capacitor (if applicable), and ground screw (located on the control panel).
4.Sizes 30 and 45 - Disconnect the gas train and move it out of the way. Discon- nect the gas supply at the union outside of the cabinet. At the gas valve, mark and disconnect the wires. Carefully remove the burner orifice and orifice adapter locking nut. Slide the orifice adapter out through the bracket on the burner push- ing the gas train to the right. This will move the gas train out of the way.
Form