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