62-11039
4-6
4.4.5 HEAT MODE
For both 2 and 3 Compartment units, only HTCON1 will
be used for heating in Compartment 1. Compartment(s)
2 and 3 will use both HTCON1 and HTCON2 heaters,
depending on how far below setpoint the box
temperature is. Heat Mode is only allowed when the
compartment setpoint is in the perishable range. Heat
Mode is not used for any compartment with a setpoint in
the frozen range.
Contactor
Turn On
Turn Off
1/2/3HTCON1
Return Air Temp is more than 0.5
_
F
(0.8
°
C) below setpoint.
Return Air Temp is less than 0.3
_
F
(0.2
°
C) below setpoint.
2/3HTCON2
Return Air Temp is more than 1.8
_
F
(1.0
°
C) below setpoint.
Return Air Temp is less than 1.5
_
F
(0.8
°
C) below setpoint.
1HTCON2
OFF
OFF
When the compartment temperature falls more than
0.5
_
F (0.8
°
C) below setpoint, (1/2/3)HTCON1 will
energize for that compartment to bring the temperature
up. The heat mode will turn off when the compartment
temperature is 0.3
_
F (0.2
°
C) below setpoint.
When only Compartment 1 is being used, and all other
compartments are Off, 1HTCON2 will also operate if
Compartment 1 is calling for Heat.
4.4.6 NULL MODE
In Null Mode, the compartment is not in Cool Mode OR
Heat Mode. If the set point is in the Frozen Range, the
evaporator fan motors will stop. If the set point is in the
perishable range, the fan motors will stop. If the
Perishable Fan Mode Configuration is set for OFF, the
evaporator fans will continue to run in Null Mode. If the
Perishable Fan Mode Configuration is set for ON, the
evaporator fans will cycle off in Null Mode.
4.4.7 UNLOADERS
Compressor unloaders are only used when one or more
compartment(s) are calling for cool. The unloaders
energize (unload) and de--energize (load) depending on
the compartment that is furthest away from setpoint.
When the unit is set for Start/Stop operation, and any
compartment has a frozen setpoint, the compressor will
operate with both unloaders de--energized (fully loaded
/ 6--cylinder operation) while the compartment is calling
for cool.
Unloader operation is shown in the following table for
other cool modes:
Mode
LOAD (de--energize) UL1
and UL2 -- 6 Cylinder
LOAD (de--energize) UL1
UNLOAD (energize) UL2
-- 4 Cyl
UNLOAD (energize) UL1 and
UL2 -- 2 Cylinder
COOL
(Perishable)
Start/Stop or
Continuous
Run
Return Air Temp is more than
2.7
°
F (1.5
°
C) above setpoint
Return Air Temp is between
2.3
°
F (1.3
°
C) and 1.5
°
F
(0.8
°
C) above setpoint.
Return Air Temp is less than
0.9
°
F (0.5
°
C) above setpoint.
COOL
(Frozen)
Start/Stop
Return Air Temp is more than
1.8
°
F (1.0
°
C) above setpoint
Return Air Temp reaches or
falls below setpoint.
N/A
Содержание VECTOR 1800 MT
Страница 1: ......
Страница 2: ...OPERATION SERVICE MANUAL for VECTOR 1800 MT Trailer Multi Temp Refrigeration Units ...
Страница 19: ...1 5 62 11039 1 3 SAFETY DECALS ...
Страница 20: ...1 6 62 11039 62 03958 00 Heat Warning 62 03957 01 High Voltage 62 60280 00 Standby Safety ...
Страница 21: ...1 7 62 11039 ...
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Страница 310: ...10 8 62 11039 BASED ON ENGINEERING SCHEMATIC 62 60926 REV G NEXT SHT ...
Страница 311: ...10 9 62 11039 FROM PREVIOUS SHT ...