Service manual

1-1
T-294-01
SECTION 1
INTRODUCTION
1.1 BRIEF UNIT DESCRIPTION
WARNING
It has been determined that pressurized,
air-rich mixtures of refrigerants and aircan
undergo combustion when exposed to an
ignition source.
This manual contains Operating Data, Electrical Data
and Service Instructions for therefrigeration unit listed
in Table 1-1.
NOTE
Beginning with early 1995 production, in
additiontoamodelnumber,CarrierTransicold
beganusingapartsidentification(PID)number
in the format NT0000. In the parts manual, the
PID number is shown in boldface to point out
parts variations within models. The PID
number must be included when ordering and
inquiring about your unit.
The unit, of lightweight aluminum frameconstruction,
is an all electric, one piece, self-contained cooling and
heating refrigeration unit (see Figure 2-1). The unit is
designedto fit inthe frontof acontainer andtoserveas
the container front wall. Forklift pockets are provided
for installation and removal of t he unit.
The unit is complete with a charge of R-134a,
compressor lubricating oil (approved POE SW20
compressor oil for R-134a only), mode indicating
lights, and temperature controlle r, and is ready for
operation upon installation.
Someunitsaredualvoltageunitsdesignedtooperateon
190/230 or 380/460 volts AC, 3-phase, 50-60 hertz
power(refer to section2.4). Otherunitsare designedto
operate on 380/460 volts AC, 3-phase 50/60 hertz
poweronly.Anexternalautotransformeris requiredfor
190/230 vac operation (refer to Figure 2-7 and section
2.4).
Operating control power is provided by a control
transformer which steps down the AC supply power
source to 18 and 24 volts AC , single phase control
power.
The temperature Controller/DataCORDER
(Micro-Link 2i) is a microprocessor-based controller
and an integrated electronic data logging device. Refer
tosections3.1and3.3. Oncethetemperaturecontroller
is set at a desired container temperature, the unit will
operate automatically to maintain the desired
temperature within very close limits. The control
system automatically selects cooling, holding or
heating as necessary to maintain the desired
temperature within the container.
WARNING
Bew a re of unannounced star t i ng of the
evaporator and condenser fans. Do not open
the condenser fan grille bef o r e turning
power OFF and disconnecting power plug.
Some units may have a TransFRESH controlled
atmosphere system added. Contact TransFRESH
Corporation, P.O. Box 1788, Salinas, CA 93902 for
information on their system.