Honeywell L91A Product Data page 10

L91A,B,D PROPORTIONING PRESSURETROL
MAIN DIFF.
16
7
F
14
6
E
12
5
10 D
4
8
C
3
6
B
2
4
A
1
2
MIN
0 0
kPa
OZS
DIFF. IS
2
IN
ADDITIVE
Fig. 8. Removing terminal block bracket.
ACTIVE WINDING
POTENTIOMETER
BRACKET
MAIN DIFF.
16
7
F
14
6
E
12
5
10 D
4
8
C
3
6
B
2
4
A
1
2
MIN
0 0
kPa
OZS
DIFF. IS
2
IN
ADDITIVE
POTENTIOMETER WIRES
THE POTENTIOMETER IN AN L91A IS MOUNTED AT A 45 DEGREE
1
ANGLE INSTEAD OF HORIZONTALLY. AN L91D HAS TWO
POTENTIOMETERS.
2
TERMINALS ARE LABELED.
Fig. 9. Replacing potentiometer in L91.
60-2152—08
®
CONTROLLERS
REMOVE BRACKET SCREW
FROM TOP OF CASE
TERMINAL
BLOCK
BRACKET
TERMINAL
BLOCK
M8521A
BARE WIRES
(ENAMEL REMOVED)
POTENTIOMETER
BOLT
WIPER ARM
TERMINAL
R
BLOCK
W
2
B
M8547A
MAIN
16
14
12
10
8
6
4
2
0
OZS
2
IN
Fig. 10. Replacing terminal block bracket.
1
10
DIFF.
7
F
6
E
5
D
4
C
3
B
2
A
1
MIN R
0
kPa
W
DIFF. IS
ADDITIVE
B
FIT HOLE IN BOTTOM
OF BRACKET OVER SCREW
PROTRUDING UPWARD
FROM BOTTOM OF CASE
TERMINAL
BLOCK
BRACKET
TERMINAL
BLOCK
M8548A