Dodge Engineering & Controls, Inc.
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Installation
EN221 and EN310 Non-Spring Return Electronic Actuators
Modulating Control, 24 VAC
1. Check that the wires are connected correctly.
2. Check that the offset (start point) and span are set correctly, if used.
3. Check that the direction of rotation switch matches the rotation of the damper shaft.
4. Connect wires 1 (red) and 2 (black) to a Digital Multimeter (DMM) with the dial set at VAC to verify that the
operating voltage is within range.
5. Check operation:
a. Connect wires 1 (red) and 2 (black) to the actuator.
b. Set the DMM dial to VDC for the actuator input signal.
c. Connect wires 2 (black) and 8 (gray) to DMM.
d. Apply a full scale input signal (10 VDC) to wire 8 (gray).
e. Allow the actuator shaft coupling to rotate from 0 to 90°.
f. Disconnect wire 8 (gray) and the shaft coupling returns to the 0 position.
6. Check feedback:
a. Set the DMM dial to VDC.
b. Attach wires 2 (black) and 9 (pink) to the DMM.
c. Apply a full scale input signal to wire 8 (gray).
The reading at the DMM should increase.
d. Remove the signal from wire 8 (gray) and the reading at the DMM should decrease and the actuator shaft
coupling returns to the 0 position.
7. Check auxiliary switch A (-S option):
a. Set the DMM dial to OHMS (resistance) or continuity check.
b. Connect wires S1 and S3 to the DMM. The DMM should indicate an open circuit or no resistance.
c. Apply a full scale input signal to wire 8 (gray).
The DMM should indicate contact closure as the actuator shaft coupling reaches the setting of switch A.
d. Connect wires S1 and S2 to the DMM. The DMM should indicate an open circuit or no resistance.
e. Stop the signal to wire 8 (gray).
f. The DMM should indicate contact closure as the actuator shaft coupling reaches the setting of switch A.
8. Check auxiliary switch B (-S option):
a. Set the DMM dial to OHMS (resistance) or continuity check.
b. Connect wires S4 and S6 to the DMM. The DMM should indicate an open circuit or no resistance.
c. Apply a full scale input signal to wire 8 (gray).
The DMM should indicate contact closure as the actuator shaft coupling reaches the setting of switch B.
d. Connect wires S4 and S5 to the DMM. The DMM should indicate an open circuit or no resistance.
e. Stop the signal to wire 8 (gray).
The DMM should indicate contact closure as the actuator shaft coupling reaches the setting of switch B.
Service
WARNING:
Do not open the actuator. If the actuator is inoperative, replace the unit.
UL Doc. No. 129-272 EAI/EN-10 Dodge Engineering & Controls, Inc.
Rev. 5, Jan., 2005
