Burnham K50 manual Test Ignition System Safety SHUT-OFF Device AS Follows

Fig. 58a

LOW FIRE ADJUSTMENT - V4062 ACTUATOR

Fig. 58B

LOW FIRE ADJUSTMENT - V9055A ACTUATOR

(6)Shut down the burner, and then restart. Repeat several times to be sure the low fire setting is that desired and suitable for correct burner light off.

(7)Turn off power supply. Remove R-W jumper, and reconnect the lead to terminal R on the

V9055A.

(8)Replace the wiring compartment cover.

16.MAIN BURNER FLAMES should have a clearly defined inner cone, see Fig. 63 with no yellow tipping.

Orange-yellow streak caused by dust should not be confused with true yellow tipping.

17.CHECK PILOT FLAME. Flame should be a blue medium hard flame enveloping approximately 3/8” of the end of the thermocouple, flame sensor, or sensing probe, see Fig. 64 thru 67.

18.CHECK THERMOSTAT OPERATION. Raise and lower thermostat setting as required to start and stop burners.

19.CHECK HIGH LIMIT CONTROL. Jumper Thermostat terminals or thermostat Connections in Limit Control. Allow burners to operate until shutdown by limit. REMOVE JUMPER.

20.TEST IGNITION SYSTEM SAFETY SHUT-OFF

DEVICE AS FOLLOWS:

Place the boiler into operation by following the appropriate lighting instructions in this manual.

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