Compressor Switches, Transducers Andsensors; Loaded Operation; Compressor Discharge Pressure Transducer (Cdp); Compressor Suction Pressuret Ransducer (Csp) - Carrier VECTOR 6500 Operation & Service Manual

1. Solenoid Valve
2. Valve Stem
3. Gas Bypass Port
4. Spring Guide
5. Spring
6. Piston
7. Bypass Valve
8. Bleed Orifice
c. Loaded Operation
With the solenoid valve (1, Figure 2−8) de-energized
the solenoid valve stem will close the gas bypass port
(3).
Pressure from the discharge manifold (item 15) through
the strainer (9) and bleed orifice (8) will build behind the
piston (6).
This increased pressure will overcome the bypass valve
spring (5) tension and force the piston (6) forward clos-
ing the gas bypass from the discharge manifold to the
suction manifold (10).
Cylinder discharge pressure will force the discharge
check valve assembly (14) open. Refrigerant gas will
then flow into the compressor discharge manifold.
The loaded cylinder bank will continue to operate fully
loaded until the solenoid valve is energized and the gas
bypass port is opened.
1
8
9
15
14
Figure 2−8 Compressor Cylinder Head Loaded
9
2
3
10
9. Strainer
10. Suction Manifold
11. Cylinder Discharge Valve
12. Valve Plate
13. Cylinder Suction Valve
14. Discharge Check Valve Assembly
15. Discharge Manifold
2.3.7 Compressor Switches, Transducers and
Sensors
a. Compressor Discharge Pressure Transducer
(CDP)
The CDP provides a signal to the microprocessor
equivalent to pressure leaving the compressor. The
reading is displayed, recorded in the DataLink data
recorder and used to control the refrigeration system. It
is located on the compressor center head.
b. Compressor Suction
(CSP)
The CSP provides a signal to the microprocessor
equivalent to pressure entering the compressor
cylinders. The reading is displayed, recorded in the
DataLink data recorder and used to control the
refrigeration system. It is located on the front of the
compressor.
c. Compressor Discharge Temperature Sensor
(CDT)
The CDT provides a signal to the microprocessor
equivalent to the temperature of the gas leaving the
compressor. The reading is displayed, recorded in the
DataLink data recorder and used to control the
refrigeration system. It is located on the compressor
center head.
2−9
4
5
7
6
11
12
13
Pressure Transducer
62-11389