Thermo King CRR-40 119, Руководство пользователя

Страница: 33 / 170

33
Unit Description
General Description
Model CRR-40 units are all-electric, single-piece,
refrigeration units with bottom air supply. Each
unit is designed to cool and heat containers for
shipboard or overland transit of deep frozen,
frozen, chilled or heated cargoes. Each unit
mounts in the front wall of the container. Fork lift
pockets are provided for installation and removal
of the unit.
The frame and bulkhead panels are constructed of
aluminum and are treated to resist corrosion. A
hinged, removable evaporator compartment door
provides easy service access. All operating
components except the evaporator coil can be
replaced from the front of the unit.
The unit is equipped with an 18.3 m (60 ft) power
cable for operation on 460-380V/3 Ph/60-50 Hz
power. For operation on 460-380V/3 Ph/60-50 Hz
power, plug the 460-380V power cable into the
proper power supply.
Each unit is equipped with 460-380V/3 Ph/60-50
Hz electric motors. An automatic phase correction
system provides the proper electrical phase
sequence for condenser fan and evaporator fan
motor operation. Unit power cable is stored below
the control box in the condenser section.
Unit features include a semi-hermetic
reciprocating compressor with a liquid injection
system; 2-speed evaporator fans; a fresh air
exchange system; and a microprocessor controller
with integral data logger. For additional unit
feature information, see the Model Features
Section.
Semi-Hermetic Reciprocating
Compressor with Liquid Injection
Cooling System
The refrigeration unit includes a semi-hermetic
reciprocating compressor with forced feed
lubrication system, ambient compensated internal
overload and high temperature protectors, and a
refrigerant injection system.
Dual Speed Evaporator Fans
CRR models are equipped with either 2 or 3
evaporator fans. All models feature 2-speed
motors. The evaporator fans operate continuously
to circulate air inside the container. The fans
operate on high speed for perishable cargo at
setpoints of -9.9 C (14.1 F) and above. At
setpoints of -10 C (14 F) and below, the
evaporator fans operate on low speed for frozen
cargo.
NOTE: If Economy Mode is ON:
Chill Loads: Evaporator fans operate on low
speed when container temperature is in-range.
Frozen Loads: Evaporator fans stop during the
Null mode; controller operates fans on low speed
for 5 minutes every 45 minutes.
Fresh Air Exchange System
The fresh air exchange system removes harmful
gases from containers carrying sensitive
perishable commodities. The fresh air vent is
located above the control box. The fresh air vent
is adjustable to accommodate a variety of cargo
and chilled load operating conditions. The fresh
air vent should be tightly closed when carrying
frozen cargo.
Microprocessor Controller
A microprocessor controller incorporates
refrigeration system component control,
thermostat, digital thermometer, fault indication
and data recording capabilities into one
self-contained package.
The controller mounts in a weather tight,
corrosion resistance enclosure. A large-character
LED display (top) provides easy viewing of the
control sensor temperature (return or supply air
temperature). A 4-line, 20-character LCD display
(bottom) display shows important data including
the setpoint temperature, controller Main Menu
tree and important unit operating data.