White Rodgers 1127 Setting the Control, Controls with Adjustable Differential

CONTROLS WITH ADJUSTABLE DIFFERENTIAL

The left-hand indicator points to the temperature at which the contacts open on high limit and low limit applications. On circulator applications, the left-hand indicator points to the temperature at which the circulator will start.

On combination low limit and circulator applications, the left-hand indicator points to the temperature at which the low limit stops the burner and permits the circulator to run.

1.Insert screwdriver in the centre slot and turn the dial until the right hand indicator (B) points to the lowest temperature of the cycle.

2.Turn the differential adjusting screw (C) until the left hand indicator (D) points to the highest temperature of the cycle.

SETTING THE CONTROL

CONTROLS WITH FIXED DIFFERENTIAL

The fixed indicator points to the temperature at which the contacts open on high limit and low limit applications. On circulator applications, the fixed indicator points to the tem- perature at which the circulator will start.

On combination low limit and circulator applications, the fixed indicator points to the temperature at which the low limit stops the burner and permits the circulator to run.

Insert screwdriver in center slot and turn the dial until the fixed indicator (B) points to the highest desired temperature of the cycle.

“B” FIXED INDICATOR	“B” FIXED
(CUT-IN POINT)
	INDICATOR
“C” DIFFERENTIAL
ADJUSTING SCREW
“D” MOVABLE INDICATOR	“A” ADJUSTING
(CUT-OUT POINT)	SLOT
“A” ADJUSTING
SLOT

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