Carrier 69NT40-541-505, Руководство по эксплуатации и обслуживанию, Страница: 82 / 143

T-368 5–2
Air exchange depends on static pressure differential,
which will vary depending on the container and how the
container is loaded.
Units may be equipped with a vent position sensor
(VPS). The VPS determines the position of the fresh air
vent (upper or lower, as equipped) and sends data to
the controller display.
5.3.1 Upper Fresh Air Makeup Vent
Two slots and a stop are designed into the Upper Fresh
Air disc for air flow adjustments. The first slot allows for
a 0 to 30% air flow; the second slot allows for a 30 to
100% air flow.
To adjust the percentage of air flow, loosen the wing
nut and rotate the disc until the desired percentage of
air flow matches with the arrow. Tighten the wing nut.
To clear the gap between the slots, loosen the wing nut
until the disc clears the stop.
Figure 5.2 gives air exchange values for an empty con-
tainer. Higher values can be expected for a fully loaded con-
tainer.
Figure 5.2 Make Up Air Flow Chart
5.3.2 Vent Position Sensor
The VPS allows the user to determine position of the
fresh air vent via Cd45. This function code is accessi-
ble via the code select key.
The vent position will display for 30 seconds whenever
motion corresponding to 5CMH (3CFM) or greater is
detected. It will scroll in intervals of 5CMH (3CFM).
Scrolling to Cd45 will display the Fresh Air Vent Position.
The position of the vent will be recorded in the Data-
CORDER whenever the unit is running under AC
power and any of the following:
Trip start
On every power cycle
Midnight
Manual change greater than 5 CMH (3 CFM)
and remains in that position for at least four
minutes
NOTE
The user has four minutes to make neces-
sary adjustments to the vent setting. This
time calculation begins on the initial move-
ment of the sensor. The vent can be moved
to any position within the four minutes. On
completion of the first four minutes, the vent
is required to remain stable for the next four
minutes. If vent position changes are
detected during the four minute stability
period, an alarm will be generated. This pro-
vides the user with the ability to change the
vent setting without generating multiple
events in the DataCORDER.
5.4 CONNECT REMOTE MONITORING RECEPTA-
CLE
If remote monitoring is required, connect remote moni-
tor plug at the unit receptacle, see Figure 3.5 .
When the remote monitor plug is connected to the
remote monitoring receptacle, the following remote cir-
cuits are energized:
5.5 STARTING AND STOPPING INSTRUCTIONS
WARNING
!
Make sure that the unit circuit breaker(s)
(CB-1 & CB-2) and the START-STOP switch
0
50
100
150
200
250
0 10 20 30 40 50 60 70 80 90 100
TBAR
1 1/2”
TBAR
2 5/8”
TBAR 3”
AIR FLOW
(CMH)
50HZ
PERCENT OPEN
0
50
100
150
200
250
300
0 10 20 30 40 50 60 70 80 90 100
TBAR
1 1/2”
TBAR
2 5/8”
TBAR 3”
AIR FLOW
(CMH)
60HZ
PERCENT OPEN
CIRCUIT FUNCTION
Sockets B to A Energizes remote cool light
Sockets C to A Energizes remote defrost light
Sockets D to A Energizes remote in-range light
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