Sullair EES LS25S Series, Руководство оператора и список запасных частей

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Section 5
OPERATION
17
5.1 INLET DAMPER LINKAGE ADJUSTMENT
The inlet dampers (outside air inlet and bypass
dampers) are positioned by the motor actuator to
maintain a constant mixed air temperature. The
operation of these two dampers is opposed; i.e.
when one is open, the other is closed. The motor
actuator is a spring return type, and will return the
outside air inlet damper to a fully closed position
when the compressor is not running. To adjust the
inlet damper linkage, perform the following steps in
sequence:
Too many starts may result in motor damage. If
there are questions, contact the motor manufac-
turer.
1. When looking at the mixed air motor actuator
from the end which is driving the damper, the
crank arm should be in the 2:00 position.
The compressor should be OFF for this check.
2. With the compressor not running, adjust the
active length of the short link rod by loosening
the lock bolt of the swivel mounted on the crank
arm, until the outside air damper is closed. The
crank arm swivel should be attached to the
crank arm at the largest radius that the crank
arm adjusting slot will allow.
3. When looking at the motor actuator from the con-
trol side (bypass air damper) the crank should
be in the 2:00 position (See Figure
5-1 ).
The compressor should be OFF for this check.
The crank arm located on the bypass damper
should be in the 2:00 position with the bypass
damper fully opened.
4. Refer to Figure 5-2 . Place the outdoor air tem-
perature changeover control at its minimum
position. Set the room thermostat at its minimum
temperature setting and start compressor,
observing the movement of the outdoor air
damper and the bypass damper. Within 60 sec-
onds of start up, the outdoor air damper should
be opened fully and the bypass damper should
close fully. Rotation of either damper should not
exceed 90º, and the damper actuator motor
should not be stalled by the linkage. If the
bypass damper does not fully open, or the
damper actuator motor stalls, proceed to the
next step. Otherwise, the inlet damper linkage is
now correctly adjusted.
5. Refer to Figure 5-3 . With the compressor not run-
ning remove the motor actuator cover. This will
expose the travel adjustment screw on the
motor actuator.
Start the compressor, again observing the
movement of the outside air damper and bypass
damper. The travel adjustment screw on the
motor actuator should be adjusted so that the
outdoor air damper opens fully (horizontal),
counterclockwise to reduce travel, or clockwise
to increase travel, as required.
If the motor actuator becomes stalled before the
outdoor air damper fully opens as a result of the
bypass damper closing too soon, loosen the
stud locknuts at the cable ends. When the out-
door air damper is fully open, close the bypass
damper manually and retighten the locknuts.
Shut off the compressor. The spring return in the
motor actuator should pull the outdoor air
damper fully closed, and the bypass damper
fully open. At this point the inlet dampers should
be properly adjusted. Replace the temperature
controller cover and motor actuator cover.
5.2 DISCHARGE DAMPER LINKAGE ADJUSTMENT
The discharge dampers (rejected air damper and
recovered air damper) are factory adjusted and
should not require periodic re-adjustment. However,
if components are replaced or adjustment is other-
Figure 5-1 Typical Damper Actuator Motor