White Rodgers 11B18 Water Heater User Manual


 
3
CONTROLS WITH ADJUSTABLE DIFFERENTIAL
The movable indicator points to the temperature at which
the contacts open. The fixed indicator points to the tem-
perature at which the contacts close. The difference
between these two indicators is the differential.
To set the control:
1. Use a screwdriver in the adjusting slot (A) on the front
of the control to turn the dial so that the fixed indicator
(B) points to the temperature at which the contacts will
close.
2. Turn the differential adjusting screw (C) until the
movable indicator (D) points to the temperature at
which the contacts will open.
CONTROLS WITH A FIXED DIFFERENTIAL
The indicator (B) points to the temperature at which the
contacts open.
To set the control:
Use a screwdriver in the adjusting slot (A) on the front
of the control to rotate dial until the desired tempera-
ture at which the contacts will open is positioned
directly under the indicator (B).
CONTROLS WITH ADJUSTABLE STOPS
Setting stop higher than control being replaced
could cause personal injury and/or property dam-
age.
1. Loosen stop screw (E) with enclosed wrench.
2. Set dial to original equipment manufacturer's specifi-
cation.
3. Without moving the dial, move stop tab (F) against
indicator.
4. Retighten stop screw (E).
SETTING THE CONTROL
“B” Fixed indicator
(cut-in point)
“C” Differential adjusting
screw
“D” Movable indicator
(cut-out point)
“A” Adjusting
slot
“E” Stop screw
“F” Stop tab
ADJUSTABLE DIFFERENTIAL
“B” Fixed
indicator
“A” Adjusting
slot
“E” Stop screw
“F” Stop tab
FIXED DIFFERENTIAL
CAUTION