Settings And Adjustments - Honeywell C645A-E Product Data

C645A-E PRESSURE SWITCHES

SETTINGS AND ADJUSTMENTS

Pressure Setpoint Adjustment
Tables 2 through 4 give the pressure and switching for each
setpoint. To adjust the pressure setting, turn the setpoint
adjustment screw (Fig. 3 and 4) clockwise
the pressure setting and counterclockwise
the pressure setting.
Table 2. C645A,D,E control points.
Setpoint Switching
a
3 R-W makes
R-B makes
b
9 R-W makes
b
15 R-W makes
c
21 R-W makes
R-B makes
d
35 R-W makes
R-B makes
a
Nominal differential—1 in. of water (0.2 kPa).
b
Differential between 1 and 3 in. of water (0.2 and 0.7 kPa).
c
Maximum differential—3 in. of water (0.7 kPa).
d
Maximum differential—4 in. of water (1.0 kPa).
Table 3. C645B control points.
Setpoint Switching
a
3 R-W makes
R-B makes
b
9 R-W makes
b
15 R-W makes
c
21 R-W makes
R-B makes
d
35 R-W makes
R-B makes
e
45 R-W makes
R-B makes
a
Nominal differential—1 in. of water (0.2 kPa).
b
Differential between 1 and 3 in. of water (0.2 and 0.7 kPa).
c
Maximum differential—3 in. of water (0.7 kPa).
d
Maximum differential—4 in. of water (1.0 kPa).
e
Maximum differential—5.7 in of water (1.4 kPa).
60-2159—8
to increase
to decrease
Pressure Pressure
in. of Water kPa
3 0.8
2 0.5
9 2.2
15 3.7
21 5.2
18 4.5
35 8.7
31 7.7
Pressure Pressure
in. of Water kPa
3 0.8
2 0.5
9 2.2
15 3.7
21 5.2
18 4.5
35 8.7
31 7.7
45 11.2
39 9.8
Table 4. C645C Control Points.
Setpoint Switching
a
1 R-W makes
R-B makes
b
3 R-W makes
R-B makes
b
5 R-W makes
R-B makes
c
Top Scale R-W makes
R-B makes
a
Nominal differential—0.2 in. of water (0.05 kPa).
b
Differential between 0.2 and 0.8 in. of water (0.05 and
1.2 kPa).
c
Maximum differential—0.8 in. of water (0.2 kPa).
C645B1047 Scaleplate Stop Adjustment
The C645B1047 is the same as the C645B1013 except for a
scaleplate stop.
Specifications
Scaleplate Stop:
Limits maximum setting, factory-set at 5-1/4 in. of water
(1.31 kPa).
Scale Range:
3 to 21 in. of water (0.75 to 5.23 kPa).
Adjusting Wrench:
Part no. 23466 included with the C645B1047.
To Adjust Scaleplate Stop
Remove cover.
Loosen scaleplate stop locking screw about 1/2 turn
counterclockwise
Wrench.
Move scaleplate stop until
desired maximum setting.
Tighten scaleplate stop locking screw clockwise
Replace cover.
6
Pressure Pressure
in. of Water kPa
1 0.25
0.8 0.2
3 0.75
2.6 0.64
5 1.24
4.3 1.2
6 1.50
5.2 1.3
with the 23466 Adjusting
bottom
edge is aligned with
.