Bryant 362AAN → ÐBURNER, NOZZLE, and Pump Pressure Chart, VIII. Constant Blower Switch

→TABLE 4ÐBURNER, NOZZLE, AND PUMP PRESSURE CHART

UNIT	FIRING	PUMP	BECKETT OIL BURNER
	RATE	PRESSURE
SIZE			Model	Nozzle
	GAL/HR (US)	(PSIG)
036105	0.76	103	AFG	0.75 gph
				70° Hollow
048125	0.90	100	AFG	0.90 gph
				70° Hollow
060155	1.12	104	AFG	1.10 gph
				70° Hollow

c.Tighten purge fitting. Allow oil to run to nozzle and fire burner.

d.If purging takes longer than 30 sec and no flame has been established, burner stops. Push reset button on top of primary control to restart burner.

e.For detailed information on operation of primary control, refer to instructions included with furnace.

VIII. CONSTANT BLOWER SWITCH

This furnace is equipped with a constant low-speed blower option. Whenever room thermostat is not calling for heating or cooling, blower runs on low speed in order to provide air circulation. If constant blower option is not desired, the rocker switch on side of control box may be used to turn off constant speed.

MAINTENANCE

→WARNING: The ability to properly perform mainte- nance on this equipment requires certain expertise, me- chanical skills, tools, and equipment. If you do not

possess these, do not attempt to perform any maintenance on this equipment other than those procedures recom- mended in the User's Manual. FAILURE TO FOLLOW THIS WARNING COULD RESULT IN POSSIBLE DAMAGE TO THIS EQUIPMENT, SERIOUS PER- SONAL INJURY, OR DEATH.

III.FAN ADJUSTMENT CHECK

This furnace is equipped with a 3-speed direct-drive motor to deliver a temperature rise (between return and supply plenums) within range specified on rating plate at external duct static pressure noted on rating plate.

CAUTION: When operating furnace in heating mode, static pressure and temperature rise (supply-air tempera- ture minus return-air temperature) must be within those limits specified on rating label. Failure to follow this warning could lead to severe furnace damage.

Adjust fan speed so that temperature rise is within rise range specified on rating plate. Consult wiring diagram for speed changes on direct-drive motor.

To adjust fan off time, set DIP switches on control board to obtain desired timing. (See Fig. 1.)

1		2		1		2	1	2	1	2
	60 Sec				90 Sec		120 Sec		150 Sec
			DELAY OFF DIP SWITCH SETTINGS

A95115

Fig. 1ÐFan Off Time DIP Switch Settings (Black Box Represents Switch Position)

IV. LIMIT CONTROL CHECK

After furnace has been in operation for at least 15 minutes, restrict return-air supply by blocking filters or closing return registers and allow furnace to shut down on high limit. The burner should shut off, and main blower should continue to run.

Remove restriction, and burner should come back on in a few minutes.

V.FOR YEAR-ROUND AIR CONDITIONING

This furnace is designed for use in conjunction with cooling equipment to provide year-round air conditioning. The blower has been sized for both heating and cooling, however, fan motor speed may need to be changed to obtain necessary cooling airflow.

VI. HEATING

The blower speed is factory set to deliver required airflow at normal duct static pressure.

VII. COOLING

The blower speed may be field adjusted to deliver required airflow for cooling application. (See Table 5.)

WARNING: Before performing any service functions, unless operations specifically require power to be on, make sure all utilities are turned off upstream of appli- ance. Failure to comply with this warning will cause a fire hazard and/or bodily harm.

WARNING: To avoid personal injury, make sure elec- trical supply power is off before servicing.

→I. GENERAL

In order to keep this furnace in good operating condition and to maintain its warranty, the furnace MUST be serviced on an annual basis. This servicing includes a nozzle change, a burner inspection, a visual check of tube passages through flue outlet and cleanout ports, and a visual inspection of combustion chamber when burner is removed.

Depending on above inspection, service could also include a cleaning and vacuuming of heat exchanger tubes and possibly the heat exchanger drum section.

Removal of any heat exchanger components which are sealed by gaskets requires replacement of gasket.

WARNING: Failure to replace any heat exchanger gas- kets with new gaskets when any heat exchanger plates or covers are removed could lead to heat exchanger leakage, sooting, and/or a hazardous condition capable of causing bodily harm.

This furnace should never be operated without an air filter. Disposable filters should be replaced at least once a year. If equipped to provide cooling, filters should be replaced a minimum of twice a year. Permanent filters should be cleaned at least twice a year.

ALWAYS KEEP MAIN OIL VALVE TURNED OFF IF BURNER IS SHUT DOWN FOR AN EXTENDED PERIOD OF TIME.

II.OIL BURNER

Contact your service technician for service.

Lubricate burner motor with SAE 10 oil. Once each year, pour 2 teaspoons of oil slowly into each oil cup.

To maintain proper performance, oil burner nozzle must be replaced once a year.

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