Belimo AF120 US Manuale - Pagina 11

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Startup and Checkout

Instructions For AF24-SR US and AF24-MFT US + P-100...

AF24-SR US and AF24-MFT US + P-100... Electrical Check-out Procedure

Step

Procedure

Control signal is applied to actuator.

Check power wiring. Correct any

problems. See Note 1.

Turn reversing switch to the correct

position. Make sure the switch is

turned all the way left or right.

Make sure the control signal positive

(+) is connected to Wire No 3 and

control signal negative (-) is connect-

ed to wire No. 1. Most control prob-

lems are caused by reversing these

two wires. Verify that the reversing

switch is all the way CCW or CW.

Check input signal with a digital volt

meter (DVM). Make sure the input

is within the range of the actuator.

For AF24-SR US this is 2 to 10 VDC

or 4 to 20 mA.

Note: The input signal must be

above the 2 VDC or 4 mA to have

the actuator move.

Check damper torque requirement.

Actuator works properly. Test

controller by following controller

manufacturer's instructions.

Note 1

Check that the transformer(s) are sized properly.

• If a common transformer is used, make sure that polarity is observed on the secondary. This means connect all No. 1

wires to one leg of the transformer and all No. 2 wires to the other leg of the transformer.

• If multiple transformers are used with one control signal, make sure all No. 1 wires are tied together and tied to control

signal negative (-).

• Controllers and actuators must have separate 24 VAC/VDC power sources.

Note 2

If failure occurs within 5 years from original installation date, notify Belimo and give details of the application.

Expected Response

Actuator will move to its "Control

Signal" position.

Power supply rating should be

the total power requirement of

the actuator(s). Minimum volt-

age of 19.2 VAC or 21.6 VDC.

Actuator will move to its "Control

Signal" position.

Drives to "Control Signal"

position.

Input voltage or current should

be ±1% of what controller's

adjustment or programming

indicate.

Torque requirement is ≤ actua-

tor's minimum torque.

Gives Expected

Response

Go To Step...

Actuator operates

properly

Step 7.

≥

Power wiring correct-

ed, actuator begins

to drive

Step 1.

Actuator operates

properly

Step 7.

Actuator operates

properly

Step 7.

Controller output

(actuator input) is

correct. Input

Polarity Correct

Step 6.

Defective Actuator.

Replace Actuator -

See Note 2.

Does Not Give

Expected Response

Go To Step...

No response at all

Step 2.

Operation is

reversed

Step 3.

Does not drive

toward "Control

Signal Position"

Step 4.

Power wiring

corrected, actuator

still does not drive

Step 4.

Does not drive

toward "Control

Signal Position"

Step 4.

Step 5.

Reprogram, adjust

repair or replace

controller as needed

Step 1.

Recalculate actuator

requirement and

correct installation.