Wayne P250 series, Руководство пользователя

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SECTION V: SERVICE AND TROUBLESHOOTING
NORMAL OPERATION CHECK OF BURNER (DIRECT IGNITION)
1. APPLIANCE CALLS FOR HEAT BY RAISING THE THERMOSTAT TO THE DESIRED SETTING: Note the transformer is always
energized with 110 volts.
2. When the thermostat circuit is complete, this allows 24 volts to coil side of the fan relay which are the bottom terminals.
3. Now that 24 volts (yellow wires) are applied to the coil, this in turn allows the 115 volt contacts to close thus allowing 115 volts to
flow to the fan across terminals #2 and #4 which are in series with the fan motor.
4. The combustion fan motor should now be energized.
5. With the fan energized, there will be a 30 second pre-purge.
6. The fan motor will develop 3400 rpm quickly causing the centrifugal endswitch to close. The endswitch can be identified by the two
red wires coming from the end cap of the fan motor.
7. After the endswitch makes, this allows 24 volts to the direct ignition control.
8. Now the ignition process will follow.
9. The direct ignition control will generate a high frequency spark at the same time the gas valve opens. The S87K has a 4 second
trial for ignition period. If after four seconds the control does not sense a minimum flame signal of 0.8 microamps then the control
will go into lockout. To reset the control simply cycle the thermostat off and then set it to the desired room temperature.
10. After the burner is operational, the control shifts into a rectification mode constantly monitoring the flame signal.
11. The burner will now cycle off and on based on the thermostat setting.