Carrier VECTOR 1550 Series - Table 3-2. Functional Parameters

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Table 3-2. Functional Parameters
FUNCTION
PARAMETER
SELECTIONS
DESCRIPTION
NOTES: Selections in BOLD are the default settings. Also, Functional Parameter marked with an asterisk (*)
may not display in the list for this unit, depending on how the microprocessor has been configured.
SILENT MODE
ON
OFF
OFF - Normal engine speed operation.
ON - Low engine speed operation. Used to disable high speed.
DEFROST TIMER
SET
FOR ....
1.5 HRS
3 HRS
6 HRS
12 HRS
The defrost timer will automatically put the unit into the defrost cycle
at the interval selected if DTT is below 40°F (4.4°C).
Shorter times are generally used for warm, humid products like pro-
duce. Longer times can be used for dry and frozen products.
Set Start/Stop Parameters
Time and Temperature values that control Start-Stop Operation are set in this section.
The microprocessor may be configured so that: 1. the same settings apply to any set point = "Together", or 2. the
settings are different, depending on whether the set point is in the perishable range or in the frozen range = "Sep-
arate".
• If "together" is configured, there will be five settings with only the fifth applicable to just frozen range.
• If "Separate" is configured there will be nine settings four labeled perishable and five labeled frozen.
• MAX OFF TIME:
OFF
10MINS
TO
255MINS
(in 1 minute incre-
ments)
OFF - There is no maximum off time.
When a minute value is selected, this is the longest amount of time
the unit will remain off during a (Perishable or Frozen or both) Auto
Start-Stop Off Cycle. When this time expires, the unit will restart and
run for the Minimum Run Time, regardless of any temperature change
inside the refrigerated compartment.
• OVERRIDE
TEMP:
2°C (3.6°F)
TO
10°C (18°F)
6°C(11°F)
(in 0.5°F or C incre-
ments)
This selects the override temperature for the Auto Start-Stop Off Cy-
cle. During the Minimum Off Time, should the refrigerated compart-
ment temperature drift this far above or below set point in the Perish-
able Range, or above set point in the Frozen Range, the micropro-
cessor will override the Minimum Off Time, and restart.
• MIN OFFTIME:
10MINS
TO
90MINS
20MINS
(in 1 minute incre-
ments)
This determines the minimum length of time the unit will remain off
whenever the unit cycles off in Auto Start-Stop Operation.
• MIN RUN TIME:
4MINS
TO
60MINS
(in 1 minute incre-
ments)
This determines the minimum length of time the unit will run every
time the unit starts in Start-Stop Operation.
• FROZEN
SHUTDOWN
OFFSET
0°C (0°F)
TO
2°C (3.6°F)
(in 0.5°F or C incre-
ments)
This only applies to Frozen set points in Start-Stop operation.
This offset is the number of degrees below set point that the unit will
run before cycling off. This will allow for a lower average refrigerated
compartment temperature when considering temperature rises during
off cycles.
PERISHABLE
SENSITIVE
PRODUCT
YES
NO
YES - the microprocessor will control supply air temperature
as Configured when supply air temperature is warmer than 0°C
(32°F).
NO - the microprocessor will control supply air temperature
as Configured only when supply air temperature falls below 0°C
(32°F).
Refer to Section 4.6.1 for complete information on Perishable Sensi-
tive Product and Supply Air Configuration interaction.