Carrier CRECOMZR072A01, Installation Instructions Manual

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15
Table 6 — Start-Up Procedures
NOTE: 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 poser
sources.
STEP PROCEDURE EXPECTED RESPONSE
EconoMi$er2
RESPONDS CORRECTLY
EconoMi$er2
RESPONDS INCORRECTLY
1.
Remove power to reset actuator.
Re-apply power.
Apply control signal to actuator
Actuator will move to its
“Control Signal” position
Actuator operates properly
Step 8
No response at all
Step 2
Operation is reversed
Step 3
Does not drive toward “Control
Signal” Position Step 4
2.
Check power wiring. Correct any
problems. See Note.
Power supply rating should be
the total power requirement of
the actuator(s). Minimum voltage
of 19.2 vac or 21.6 vdc
Power wiring corrected, actuator
begins to drive Step 1
Power wiring corrected, actuator
still does not drive Step 4
3.
Turn reversing switch to the
correct position. Make sure the
switch is turned all the way left or
right.
Actuator will move to its
“Control Signal” position.
Actuator operates properly
Step 8
Does not drive toward “Control
Signal” Position Step 4
4.
Make sure the control signal
positive (+) is connected to Wire
No. 3 and control signal negative
(-) is connected to Wire No. 1.
Most control problems are
caused by reversing these two
wires. Verify that the reversing
switch is all the CCW or CW.
Drives to “Control Signal”
Position
Actuator operates properly
Step 8
Step 5
5.
Check input signal with a digital
volt meter (DVM). Make sure the
input is within the range of the
actuator (2 to 10 vdc or 4 to 20
mA).
NOTE: The input signal must be
above the 2vdc or 4 mA
to have the actuator move.
Input voltage or current should
be ± 1% of what controller’s
adjustment or programming
indicate.
Controller output (actuator input)
is correct Input Polarity Correct
Step 6
Reprogram, adjust, repair or
replace controller as needed.
Step 1
6.
Loosen the nuts on the V- bolt
and move the damper by hand
from fully closed to fully open.
Damper will go from fully closed
to fully open.
Damper moves properly.
Step 7
Find cause of damper jam and
repair. Move damper back to fully
closed position and tighten the
nuts
Step 1
7.
Check damper torque
requirement
Torque requirement is actuator’s
minimum torque.
Defective Actuator
Replace Actuator
Recalculate actuator requirement
and correct installation
8.
Actuator works properly. Test
controller by following controller
manufacturer’s instructions.
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