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Burnham RSA manual Test Controls, Verify High Limit Operation

Models: RSA

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trapped in the nozzle line. It may take several firing cycles for that air to be fully vented through the nozzle. Water in the fuel or poor flame shape can also cause shut down noises.

P. TEST CONTROLS

WARNING

Before installation of the boiler is considered complete, the operation of all boiler controls must be checked, particularly the primary control and high limit control.

1.CHECK THERMOSTAT OPERATION. Raise and lower thermostat setting as required to start and stop burner.

2.VERIFY PRIMARY CONTROL SAFETY FEATURES using procedures outlined in Instructions furnished with control (See back of Control Cover) or Instructions as follows:

WARNING

Service of this boiler should be undertaken only by trained and skilled personnel from a qualified service agency.

a.Simulate flame failure:

•Follow the starting procedure to turn on the burner.

•Close the hand valve in the oil supply line.

•Control enters recycle mode and tries to restart burner after approximately 60 seconds.

•Safety switch should lock out in approximately 15 seconds. Ignition and motor should stop.

•Indicator light will flash ½ second on,

½second off.

•Push red reset button to reset safety switch.

b.Simulate ignition failure:

•Follow the starting procedure to turn on the burner, but do not open the oil supply hand valve.

•Safety switch should lock out in approximately 15 seconds. Ignition and motor should stop.

•Indicator light will flash ½ second on,

½second off.

•Push red reset button to reset safety switch.

c.Simulate power failure:

•Follow the starting procedure to turn on the burner.

•With the burner running, turn off the power to the system by tripping the circuit breaker or removing the fuse.

•Burner should stop.

•Restore power. Burner should start.

3.VERIFY HIGH LIMIT OPERATION.

a.Adjust thermostat to highest setting.

b.Observe temperature gauge. When temperature is indicated, adjust limit to setting below observed temperature. Burner should stop.

c.Adjust limit to setting above observed temperature. Burner should start.

d.Adjust thermostat to lowest setting. Adjust limit to desired setting.

4.CHECK LOW WATER CUTOFF (if so equipped).

a.Adjust thermostat to highest setting.

b.With boiler operating, open drain valve and slowly drain boiler.

c.Burner should stop when water level drops below low water cutoff probe. Verify limit, thermostat or other controls have not shut off boiler.

d.Adjust thermostat to lowest setting. Refill boiler.

Q.Boiler is now ready to be put into service.

IMPORTANT

IF, DURING NORMAL OPERATION, IT IS NECESSARY TO ADD WATER MORE FREQUENTLY THAN ONCE A MONTH, CONSULT A QUALIFIED SERVICE TECHNICIAN TO CHECK YOUR SYSTEM FOR LEAKS.

A leaky system will increase the volume of make-up water supplied to the boiler which can significantly shorten the life of the boiler. Entrained in make-up water are dissolved minerals and oxygen. When the fresh, cool make-up water is heated in the boiler the minerals fall out as sediment and the oxygen escapes as a gas. Both can result in reduced boiler life. The accumulation of sediment can eventually isolate the water from contacting the steel. When this happens the steel in that area gets extremely hot and eventually cracks. The presence of free oxygen in the boiler creates a corrosive atmosphere which, if the concentration becomes high enough, can corrode the steel through from the inside. Since neither of these failure types are the result of a manufacturing defect the warranty does not apply. Clearly it is in everyone’s best interest to prevent this type of failure. The maintenance of system integrity is the best method to achieve this.

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Burnham RSA manual Test Controls, Verify High Limit Operation
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RSA specifications

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