1-2
T-296
1.3.11 Condenser Coil
The unit may be fitted with a 2 row or 4 row coil using
nominal 3/8 inch tubing, or the unit may be fitted with a
3 row coil using 7mm tubing. The required refrigerant
charge is different for each coil.
1.3.12 Autotransformer
An autotransformer may be provided to allow operation
on 190/230, 3phase, 50/60 hertz power. The
autotransformer raises the supply voltage to the
nominal 380/460 volt power required by the base unit.
The autotransformer may also be fitted with an
individual circuit breaker for the 230 volt power.
If the unit is equipped with an autotransformer and
communications module, the autotransformer will be
fitted with a transformer bridge unit (TBU) to assist in
communications.
1.3.13 Temperature Recorder
One of three recording devices may be fitted to the unit.
The
devices
include
a
mechanical
recorder
manufactured by Partlow Corporation, a mechanical
recorder manufactured by Saginomiya Corporation,
and an electronic recorder manufactured by Partlow
Corporation.
1.3.14 Gutters
Rain gutters may be fitted over the control box and
recorder section to divert rain away form the controls.
The different gutters include standard length bolted
gutters, extended length gutters and riveted gutters.
1.3.15 Handles
The unit may be equipped with handles to facilitate
access to stacked containers. These handles may
include fixed handles (located at the sides of the unit)
and/or a hinged handle at the center (attached to the
condenser coil cover).
1.3.16 Thermometer Port
The unit may be fitted with ports in the front of the frame
for insertion of a thermometer to measure supply and/or
return air temperature. If fitted, the port(s) will require a
cap and chain.
1.3.17 Water Cooling
The refrigeration system may be fitted with a water
cooled condenser. The condenser is constructed using
copper--nickel tube for sea water applications. The
water cooled condenser is in series with the air cooled
condenser and replaces the standard unit receiver.
When operating on the water cooled condenser, the
condenser fan is deactivated by either a water pressure
switch or condenser fan switch.
1.3.18 Back Panels
Back panel designs that may be fitted include panels of
aluminum and stainless steel. Panels may have access
doors and/or hinge mounting.
1.3.19 460 Volt Cable
Various power cable and plug designs are available for
the main 460 volt supply. The plug options tailor the
cables to each customers requirements.
1.3.20 230 Volt Cable
Units equipped with an autotransformer require an
additional power cable for connection to the 230 volt
source. Various power cable and plug designs are
available. The plug options tailor the cables to each
customers requirements.
1.3.21 Cable Restraint
Various designs are available for storage of the power
cables. These options are variations of the compressor
section front cover.
1.3.22 Upper Air (Fresh Air Make Up)
The unit may be fitted with an upper fresh air makeup
assembly. These assemblies are supplied in two
designs, the standard design and the micro design. The
openings may also be fitted with screens.
1.3.23 Lower Air (Fresh Air Make Up)
The unit may be fitted with a lower fresh air makeup
assembly. These assemblies are supplied in two
designs, the standard design and the macro design. The
openings may also be fitted with screens.
1.3.24 Controlled Atmosphere
The units may be fitted with the TransFresh option.
For information on the TransFresh system, contact
TransFresh Corporation, P.O. Box 1788, Salinas CA
93902
1.3.25 Arctic Mode
To improve operation in cold ambients, the unit may be
fitted with a crankcase heater and/or a condensate drain
line heater. The crankcase heater is operated, before
start--up, to warm the compressor oil and boil off any
liquid refrigerant that may be present in the crankcase.
The drain line heater is operated to prevent freezing of
the evaporator condensate drain system.
1.3.26 Humidification
The unit may be equipped with the Carrier Transicold
NatureFresh humidity management system. The
system includes a water tank, water pump, water heater
and atomizer along with various control and monitoring
devices. It is designed to add additional moisture into
the supply air for control of cargo moisture level. A
separately bound manual covering operation and parts
for the CTD NatureFresh System is available, see the
following chart.
Manual
Number
Equipment
Covered
Type of
Manual
T-297
Humidity Management
System Option
Technical
Supplement
1.3.27 Power Correction
The unit may be fitted with a set of power factor
correction capacitors to assist in correction of
imbalance in current draw by the compressor.
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