Refrigeration System Component Specifications; Electrical Specifications Ecdc Motors; Electrical Specifications; Safety Devices - Carrier CAPRI-280 Operation And Service Manual

1.2.3 Compressor Assembly
The compressor assembly includes the refrigerant
compressor, clutch assembly, suction and discharge
service valves, high pressure switch, low pressure switch,
suction and discharge servicing (charging) ports and
electric solenoid unloaders.
The compressor raises the pressure and temperature of
the refrigerant and forces it into the condenser tubes.
The clutch assembly provides a means of belt driving the
compressor by the bus engine. The suction and discharge
service valves enable servicing of the compressor. Suction
and discharge servicing (charging) ports mounted on the
service valves enable connection of charging hoses for
servicing of the compressor, as well as other parts of the
refrigerant circuit. The high pressure switch contacts
open on a pressure rise to shut down the system when
abnormally high refrigerant pressures occur. The electric
unloaders provide a means of controlling compressor
capacity, which enables control of temperature inside the
bus. For more detailed information on the compressor,
refer to manual number 62-02756.
1.3 REFRIGERATION SYSTEM COMPONENT
SPECIFICATIONS
a. Refrigeration Charge
R-134a: 11.3 lb (5.1 kg)
b. Compressor
Model: 05G
No. of Cylinder: 6
Weight (Dry): 165 lb (75 kg)
Oil Charge:
New Compressor: 6.75 pints (3.2 liters)
Replacement Compressor: 5.5 pints (2.6 liters)
Oil Level:
Level in sight glass between Min.---Max marks on
compressor crankcase (curbside)
Approved Compressor Oils - R-134a:
Castrol: Icematic SW68C
Mobil: EAL Arctic 68
ICI: Emkarate RL68H
c. Thermostatic Expansion Valve - for R-134a
Units:
Superheat Setting (Non-externally adjustable): 10
to 12_F
MOP Setting (Nonadjustable): 55 4 psig (375
28.5 kPa)
d. High Pressure Switch (HPS) - for R-134a
Units:
Opens at: 300 10 psig
Closes at: 200 10 psig
T-283

1.4 ELECTRICAL SPECIFICATIONS ECDC MOTORS

a. Evaporator/Heater Blower (Fan) Motor
Full Load Amps (FLA): 8.4A
Horsepower: 0.34
Voltage: 24 vdc
Operating Speed: 4375 rpm
b. Condenser Fan Motor
Bearing Lubrication: Shell Dolium R
Horsepower: 0.15 hp
Full Load Amps (FLA): 7A
Operating Speed: 3180 rpm
Voltage: 24 vdc

1.5 ELECTRICAL SPECIFICATIONS --

Controller Input Sensors and Transducers
a. Suction and Discharge Pressure Transducer
Supply Voltage: 4.5 to 5.5 vdc (5 vdc nominal)
Supply current: 8 mA maximum
Output Range: 8K ohms minimum
Input Range: ---6.7 to 450 psig (---46.2 kPa to 3.1 mPa)
Output Current: -1.5 mA minimum to
1.5 mA maximum
Output Voltage: vdc = 0.0098 x psig
+ 0.4659 (See Table 4-2 for calculations.)
b. Temperature Sensors
Input Range: ---52.6 to 158_F (---47 to 70_C)
Output: NTC 10K ohms at 77_F (25_C)
(See Table 4-1 for calculations.)

1.6 SAFETY DEVICES

System components are protected from damage caused
by unsafe operating conditions with safety devices. Safety
devices with Carrier Transicold supplied equipment
include high pressure switch (HPS), low pressure switch
(LPS), circuit breakers and fuses.
a. Thermal Switches
Condenser Motor Overloads
Each condenser fan motor is equipped with an internal
thermal protector switch, condenser motor overloads. If
excessive motor temperature exists, the condenser motor
overload switch will
corresponding condenser fan.
Evaporator Motor Overloads
The evaporator fan motors are equipped with internal
thermal protector
temperature exists, the switch will open to de-energize
the corresponding evaporator fan; this will prevent the
affected evaporator motor from operating.
1-4
open to de-energize
switches. If excessive
the
motor