Operation - Honeywell MS 10 Series Manual

OPERATION

The actuator is designed to be used in ventilating and air
conditioning installations to operate valves, dampers,
ventilation flaps and louvers requiring torque up to the
rating. (For ratings, see the Specifications section.) If the
power fails, the actuator will spring return to the start
position.
The actuator is operated by a proportional controller. When
using a proportional controller, the actuator drives toward
its fully open position when the input signal increases; the
actuator drives toward the fully closed position when the
input signal decreases. The actuator stops when the input
signal reaches the desired proportional control point.
IMPORTANT
The actuator is designed to respond to DDC
Controller instantaneous contact closures. Take
care not to short cycle the actuator. Unstable
damper control can cause premature actuator fail-
ure.
Actuator Override
To override the control signal (for freeze protection or
similar applications):
1. Override to full open:
a. Disconnect the input signal (from terminal 3).
b. Apply 24 Vac to terminal 3.
c. See Fig. 32.
2. Override to full closed:
a. Disconnect the input signal (from terminal 3).
b. See Fig. 33.
1 24 VAC
2
0/2 TO 10 VDC
PROPORTIONING
CONTROLLER
–
+
FEEDBACK
1 LINE VOLTAGE POWER SUPPLY.
PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
2 24 VDC SUPPLY ACCEPTABLE.
3
SET SWITCH TO MODULATING.
Fig. 32. Override to full open.
ACTUATOR
1
V
2
3 OR +
OR N/A
4
FEEDBACK
5
2-10 VDC
10-2 VDC
SPDT
0-10 VDC
3
10-0 VDC
Fltg, fwd
Fltg, rev
M19576A
1
24 VAC
2
0/2 TO 10 VDC
PROPORTIONING
CONTROLLER
–
+
FEEDBACK
1 LINE VOLTAGE POWER SUPPLY.
PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
24 VDC SUPPLY ACCEPTABLE.
2
3
SET SWITCH TO MODULATING.
Fig. 33. Override to full close.
End Switches
Some models include end switches (see Table 2). For wiring
details, see Fig. 12.
SPDT Switches (Fig. 34)
For SPDT end switch wiring, see Fig. 12.
95
S3
S2
S1
SWITCH CONNECTIONS
Fig. 34. SPDT End Switch Operation.
15
MSXX10, MSXX20 SERIES
ACTUATOR
1
V
2
3 OR +
OR N/A
4
5 FEEDBACK
2-10 VDC
10-2 VDC
SPST
0-10 VDC
3
10-0 VDC
Fltg, fwd
Fltg, rev
M19577A
+
85 3
-
CONTACT OPEN
CONTACT MADE
S6
S5
+
7 3
-
0
S4
M19578
63-2607—26