put a stress on the motor bearings.

START UP PROCEDURE

General:

1. Make certain that correct voltage has been supplied to motor and control circuit.
2. Insure that outside air openings are provided in the boiler room for ventilation, and for admission of air for combustion. The free area of such openings should not be less than 7 square inch opening per 100,000 Btuh burner input, or more as required by local codes.
3. Check to see that flue, wiring and water level are in order.
4. Start burner fan motor to prime pump. If pump does not pick up oil within a few minutes, prime the pump with lubricating oil. Do not allow pump to run more than a few minutes without additional lubrication.
5. Check oil pressure and adjust if necessary. (See REGULATING OIL PRESSURE).
6. Set air shutters. (See ADJUSTING BURNER) Refer to Figure 1.
7. Generously lubricate the front motor bearing with SAE #20 oil.

ADJUSTING BURNER (See Figure 1)

Positioning of the nozzle in relation to the face of the cone and the electrodes in relation to the nozzle are very important, also the face of the cone in relation to the face of the choke ring must be set according to the chart for each rate.

If the air shutter openings are too large the oil may not ignite.

1. This setting will vary somewhat depending upon the grade of oil being used or if No. 1 is used instead of No. 2.
2. The approximate burner air setting may be determined by observing the fire through the observation port on the front of the boiler. If the flame is smoky, the air shutter should be opened until the fire burns clean, without any trace of smoke. The flame should be bright yellow in color with the tips of the flame turning orange. If the flame is too white, reduce the amount of air admitted; and, if too red or smoky increase the air.
3. Final adjustments should be made using a flue gas analyzer to measure the CO₂ content of the flue gas and a Bacharach model smoke meter or equivalent to determine the amount of smoke (not to exceed a "TRACE").
4. For checking efficiency only the stack temperature and CO₂ may be taken immediately after the fan and refer to the standard efficiency charts for the results. Readings of 5 to 8% taken after the fan correspond to 10 to 12% taken in the rear uptake of the boiler.
5. The reduction in CO₂ reading in the flue is caused by the air being drawn in around the motor shaft for cooling purposes. The motor cooling air is at ambient temperature and, therefore, does not add energy to or subtract energy from the flue gas analysis, it only adds volume to the flue gas. Therefore, applying this data to standard efficiency charts will give a true indication of flue gas loss.

NOTE

Final adjustment should be made after the burner has been firing continuously for at least 10 minutes, as the fan pulls less air when the flue gases are hot.

A. CHECK LIMIT CONTROL

• Run the burner long enough to bring the water temperature up to at least 190 degrees then turn the limit control setting until the burner stops.

NOTE

The Minimum limit setting for any hot water boiler should be 140 degrees F. in order to prevent corrosion of the flues on the fire side. The burner should be run with the primary control thermostat terminals jumpered and the burner controlled directly from an aquastat keeping the boiler hot all the time, thus eliminating the sweating of the flues on the fire side caused by starting from a cold start.

BELT ADJUSTMENT

The proper tension on the fuel unit belt drive is set at the factory. However, the belt should be checked periodically to see that the setting is