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4.6 ProductShield
t
ProductShield is a group of configuration settings within
the microprocessor that work together with the IntelliSet
option to allow improved operating efficiency while
providing customized product protection for up to 30
different commodities.
4.6.1 Modes
There are 4 modes to ProductShield:
a. ProductShield: Econo: Go To Start/Stop
ProductShield Econo allows the unit to have the ability
to automatically switch from Start/Stop operation to
Continuous run or vice versa. This allows maximum
product protection while providing for fuel savings
depending on ambient conditions.
When the unit is set for Continuous Run, ProductShield
Econo: Go To Start/Stop allows the unit to change to
Start/Stop when the unit has run in Continuous Run for a
minimum of 15 minutes and the ambient temperature
falls
within
a pre--programmed temperature range.
(See Section d. below). The operator can also optionally
pre--program a maximum temperature differential
(delta--t) between the return air and supply air sensors
as an additional criteria for switching to Start/Stop if the
Econo Delta--T configuration is not OFF. The unit must
bring the delta--t below this setting before going to
Start/Stop if this option is chosen. If unit is set for
Continuous Run and ProductShield Econo is configured
for GO TO CONTINUOUS, the unit will remain in
Continuous Run.
Once the micro detects that the above criteria have
been met, the unit will switch from Continuous Run to
auto Start/Stop for a minimum of 30 minutes or until the
unit cycles off. After 30 minutes the unit will return to
Continuous Run once the ambient temperature falls
outside
the pre--programmed temperature range by
±
3.6
°
F (
±
2
°
C).
If the unit shuts down in Auto Start/Stop, it will remain
shut down according to the pre--programmed start/stop
parameters. When the unit restarts it will return to
Continuous Run operation for a minimum of 15 minutes.
The original activation conditions must again be met in
order for the unit to return to auto Start/Stop.
b. ProductShield: Econo: Go To Continuous Run
When the unit is set for Start/Stop, ProductShield
Econo: Go To Continuous Run allows the unit to run at
Continuous Run for periods providing ProductShield
Econo configuration is set to GO TO CONTINUOUS
(See Section 5.2.1), the unit has run in Start/Stop for a
minimum of 15 minutes or the Minimum Run Time minus
60 seconds (See Table 3-2) and the ambient
temperature
falls
outside
a
pre--programmed
temperature range. If unit is set for Start/Stop and
ProductShield Econo is configured for GO TO
START/STOP, the unit will remain in Start/Stop.
Once the micro detects that the above criteria have
been met, the unit will switch from Start/Stop to
Continuous Run for a minimum of 30 minutes. After 30
minutes the unit will return to Continuous Run once the
ambient temperature falls
within
the pre--programmed
temperature range by
±
3.6
°
F (
±
2
°
C). Delta--t logic is
not used when unit is configured for GO TO
CONTINUOUS.
c. ProductShield: High Air
High air mode allows the unit to provide increased
airflow
with
a
reduced
delta--t
under
the
pre--programmed criteria. This can maximize product
protection under difficult conditions while allowing the
unit to operate more efficiently during less demanding
conditions.
When the refrigeration unit is set for normal airflow,
ProductShield High Air allows the unit to run at high air
operation for periods providing the ambient temperature
falls within a pre--programmed temperature range. The
operator can also optionally pre--program a maximum
temperature differential (delta--t) between the return air
and supply air sensors as an additional criteria for
switching to high air if the Econo Delta--T configuration
is not OFF. The unit must bring the delta--t above this
setting before going to high air if this option is chosen.
Once the micro detects that the pre--programmed
criteria have been met, the unit will switch from normal
operation to High Air. The unit will continue to operate in
High Air for a minimum of 30 minutes. After 30 minutes
the unit will return to normal operation once the ambient
temperature falls outside the pre--programmed
temperature range by
±
3.6
°
F (
±
2
°
C).
If the unit shuts down in Auto Start/Stop during high
speed, it will not be in ProductShield High Air when it
restarts and will return to normal operation for a
minimum of 15 minutes. The original activation
conditions must then be met in order for the unit to return
to high air.
Содержание VECTOR 1800 MT
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Страница 310: ...10 8 62 11039 BASED ON ENGINEERING SCHEMATIC 62 60926 REV G NEXT SHT ...
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