White Rodgers 668-430 User's Manual
Contents
1. s instructions f WARNING Be sure to remove wire jumper after finishing this flame detector check LEVER ON SAFETY SWITCH To insure shutdown of burner during servicing push in on Safety Reset Indicator Light to trip Safety Switch causing the Reset Button to pop out and Indicator Light to glow CAUTION ELECTRIC SHOCK IS STILL A POSSIBILITY Although lockout of safety switch will interrupt the entire line voltage circuit to burner terminal No 1 power supply will remain Hot When burner servicing is finished simply push in on Reset Button to reset the Safety Switch RESET BUTTON SAFETY RESET INDICATOR LIGHT AND MANUAL LOCKOUT BUTTON2. D FLAME DETECTOR CHECK This test is not required if the control performs as described in test A If the burner starts but the control locks out stopping the burner check the flame detector as follows 1 Open the line switch 2 Connect one end of a wire jumper to one of the F terminals 3 Start the burner by closing the line switch As soon as flame has been established connect other end of the wire jumper to the other F terminal WARNING The control provides no safety protection with this jumper installed Do NOT leave burner in this condition except for making this check lf the control still locks out with the jumper installed the control should be replaced If the control does not lock out however check the operation of the 956 flame detector as follows 4 If safety lockout problem is of an occasional nature the following additional check may be made to insure that flame detector location is not a marginal one a Disconnect flame detector leads from F terminals anaa OPERATION OF MANUAL LOCKOUT D FLAME DETECTOR CHECK Continued Possible Cause of Correction Trouble Open circuit in Replace Cell or Cell Assembly of Cell 956 Flame Detector Do not disturb position of bracket or socket assembly Flame detector im Locate flame detector according to properly positioned the burner manufacturer s speci fications TYPE 956 FLAME DETECTORS OLD STYLE NEW STY
3. LE CELL ASSEMBLY Rotate Cell Assembly counterclock wise to remove it To replace it insert end through notched opening in bracket and rotate clockwise NOTE If bracket is ever removed from burner Cell Assembly will eracker not fit if bracket is reinstalled backwards PART No OF REPLACEMENT PARTS 63 0485 Cell only Old Style 63 2006 Cell Assembly New Style b Attach a jumper wire to one F terminal Start burn er Then immediately connect jumper wire to the other F terminal Burner should continue to run SOCKET ASSEMBLY c With burner running attach flame detector leads to an accurate ohmmeter Reading of ohmmeter should be below 1000 ohms and preferably as low as 500 ohms NOTE If indicator of ohmmeter remains steady readings up to 2000 ohms should also be acceptable Generally though the lower the reading the better the application and less likely the chance of a varia tion in the burner flame causing a safety lock out d If resistance of flame detector is over 1000 ohms it may not be able to see the burner flame properly Check alignment of the flame detector through the hole in the static pressure disc Clean this hole if it is blocked by foreign matter Check for broken F wires e If flame detector alignment is good but resistance is still high readjustment of burner flame and or nozzle replacement may be necessary according to burner manufacturer
4. TYPE 668 430 Intermittent Ignition Non Recycling OIL BURNER CONTROL With Safety Reset Indicator Light For use with Type 956 Flame Detector on 2 wire or 3 wire Series 10 systems This type 668 Oil Burner Control provides safe operation cator Light which glows whenever the control locks out on of oil burners on heating plants where ignition during the safety to stop the burner The 668 is for use with the 956 entire burner cycle is desired It may be used with either Flame Detector a 2 wire or a 3 wire Series 10 thermostat This 668 control is equipped with a red Safety Reset Indi INSTALLATION _ _ _ _ omnes SPECIFICATIONS Room Thermostat Set dial of adjustable heater at 4A If Formerly called constant ignition The proper Location and Mounting of the primary oil burner Time Delay Fan Switch is used set dial at 5A for typical control panel on the burner and the flame detector with Fan Switch current of 15A respect to the oil flame shall be determined by the furnace Time Delay Fan Switch 15A Max at 25v If used connect boiler or burner manufacturer to F1 B terminals Safety Timing 45 seconds If this control supplied as part of a furnace boiler or burner For more complicated systems especially for hot water is wired to the equipment or if the manufacturer of such heating consult the manufacturer of the heating plant or equipment provides instructions for wiring this control the
5. ll for heat 4 Make certain that high limit control is set at the correct temperature TESTING CONTINUED ON NEXT PAGE BEE wuite Rovcers pivision pag EMERSON ELECTRIC CO Printed in U S A PART No 37 2649 A 9797 REAVIS ROAD Replaces 37 2649 ST LOUIS MISSOURI 63123 eplaces EMERSON B SAFETY TIMING 1 Let the burner run for about 5 minutes Then remove one of Flame Detector leads from the F terminals After a time period corresponding to the safety timing has elapsed the contro should lock out on safety stopping the burner and causing the red Safety Reset Indicator Light to glow 2 Open the line switch Replace Flame Detector lead removed in step 1 4 Wait about 3 minutes Then operate the manual reset button on top of control w C HIGH LIMIT AND THERMOSTAT CHECK 1 Close the line switch to start the burner 2 Lower the setting of the high limit control to its lowest setting This should stop the burner unless furnace or boiler temperature is below the minimum setting of the high limit 3 Return high limit control to its proper setting Burner should restart 4 With the burner running turn thermostat to its lowest setting This should stop the burner unless actual room temperature is below the lowest setting of the thermo stat Note On systems supplying domestic hot water burner will continue to run if low limit control is not satisfied 5 Return thermostat to its proper setting
6. n write to White Rodgers giving full details of the desired follow his recommendations If no special wiring instruc sequence of control operation tions are given then follow the electrical connections shown USING 668 430 TO REPLACE LOW VOLTAGE USING 668 430 TO REPLACE LINE VOLTAGE PRIMARY CONTROLS SUCH AS TYPES 668 1 TO 99 PRIMARY CONTROLS SUCH AS TYPES 6L68 1 TO 99 FOR 2 WIRE FOR 3 WIRE THERMOSTAT FERIEN FLAME FLAME THERMOSTAT FLAME DETECTOR a DETECTOR G A WW sh S S Low Voltage Wiring IELD INSTALLED IMPER Low Voltage Wiring o O PRIMARY cy zasd fr BLACK External ORANGE Line Voltage Wiring IGNITION i gt TRANS External Line Voltage Wiring ORANGE WIRE NUTS IGNITION t AN UNE VOLTAGE THERMOSTAT OA BURNER OPERATING CONTROL WOT GNO MOTOR HOT MOTOR LINE LINE TESTING The following control checks should be made after each 5 Open the hand valve in the oif line The system is now installation to insure that the controls are correctly wired ready for the following tests and functioning properly A NORM CNCLE Ciose the line switch The burner should start and con tinue to run normally If burner starts establishing 3 Operate the manual reset button on top of control flame but then locks out on safety make Flame Detec tor Check at this time 1 Open the main line switch 2 Adjust thermostat or operating control to ca
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