Actuator Reset - Airstream EXPERT PN110 User Manual

EXPERT PN110
Stage #x (min) — Assign an inlet opening
(in %) with the startup of each variable fan
stage.
Stage #x — Assign an inlet opening (in%)
with each on/off fan stage and with the end
of each variable fan stage.
Over-Opening — Assign an inlet position to
the over-opening stage. *This parameter is ac-
cessible if the over-opening function is enabled in
the Installation Setup (see section 4.5)
Over-Opening Bandwidth — Specify the num-
ber of degrees above the start temperature
of the last fan stage the inlet must reach its
over-opening position. *This parameter is acces-
sible if the over-opening function is enabled in the
Installation Setup (see section 4.5).
Total open — Enter the exact time that is
required to reach the actuator's maximum
limit switch. The controller will limit the open-
ing of the inlet according to this parameter
value. *This parameter is accessible if the air inlet
uses a timer.
Under Run Open Time (for timer-based inlets
only) — When a timer ends, it may take a
few seconds for the actuator to actually
stop moving. For this reason, the controller
can switch off the actuator's motor slightly
before its time for the actuator to reach its
exact moving time without exceeding it. This
parameter ranges from 0 to 3 seconds.*This
parameter is only shown if the inlet uses a timer and
it is only accessible with the factory password.

6.3.3. Actuator Reset

[For timer-based inlets only]
No reset can be made when the outside
temperature falls to a user-defi ned value.
This applies to automatic & manual
resets.
Resetting the actuator's position is used to
clear accumulated time offsets caused by
the frequent openings and closings of the
inlet. The controller resets the actuator's
position at regular intervals to make sure the
inlet position is always accurate. This reset
is performed automatically according to one
of these two methods:
1. Reset the minimum position only
(Close mode)
Each time a reset is performed, the inlet to-
tally closes. Once the actuator's position is
reset, the inlet returns to its previous position.
The "Close" pilot light of the inlet fl ashes while
the controller closes the inlet.
2. Reset toward the nearest position
(Open/Close mode)
If the current inlet position is higher than 50%
at the reset time, the controller fully opens
the inlet to reset the actuator's position; if
the current inlet position is lower than 50%,
the controller closes the inlet to perform the
reset. This way, the inlet never closes when
the room temperature already asks for a wide
opening. The "Open" or "Close" pilot light of
the inlet fl ashes while the controller moves
the inlet.
Make sure limit switches are located at
both ends of the actuators when using
this resetting method.
1. Select:
» INLET
4 Inlet Reset*
»
* This menu is accessible if a timer-based inlet is
enabled (section 4.5).
4. Inlet Reset
Inlet Auto Reset
Reset Mode Op/Cl
Reset Now? No
Day Time 06:00 am
Period 3
Delay 02:00
Disable If Out.T° Is
Below 10.0 °F
2. Set the following parameters:
Inlet reset mode — Select the desired reset
mode: "Op/Cl" to reset the actuator toward
its nearest position; select "Close" to reset
the actuator toward its closed position only
or select "Off " to disable the automatic reset.
Inlet reset now? — Select "Yes" to reset the
actuator's position now.
Day time — Set the time at which resets are
performed.
Period — Enter the frequency of inlet resets. A
reset can be performed once every 1-7 days.
Reset delay — During a reset, the controller
opens or closes the inlet during this delay, or
up until a limit switch is reached. The reset
delay should be set to the same time value or
higher than the total opening time (as defi ned
in previous section).
Disable if Out.T° is Below — To prevent the
inlet from closing against ice, the controller
can stop all inlet resets when it is too cold
outside. Set the outside temperature below
which inlet resets are forbidden (this includes
manual resets). *This parameter is accessible if
an outside temperature sensor is enabled (see sec-
tion 4.7.1).
EXPERT PN110 rev.23
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