Figure 2.11 Cylinder Head - Loaded - Carrier Supra 950MT Operation & Service Manual

1
1. Solenoid valve
2. Valve stem
3. Gas bypass port
4. Spring guide
5. Spring
6. Piston
7. Piston bypass valve
8. Bleed orifice
Loaded Operation
Refer to Figure 2.11. Discharge pressure bleeds from the discharge manifold (Item 15) through the strainer (9) and
(8) bleed orifice to the solenoid valve stem (2) chamber and the back of the piston bypass valve (7).
With the solenoid valve (1) de-energized the solenoid valve stem closes the gas bypass port (3).
Refrigerant pressure overcomes the bypass valve spring (5) tension and forces the piston (6) forward closing the
gas bypass from the discharge manifold to the suction manifold (10).
Cylinder discharge pressure forces open the discharge piston check valve assembly (14). Refrigerant gas passes
into the compressor discharge manifold.
The loaded cylinder bank continues to operate fully loaded until the solenoid valve control device is energized and
the gas bypass port is opened.
c. Condenser/Subcooler
The condenser is of the tube and fin type, and acts as a heat exchanger in which the compressed refrigerant gas is
condensed into a liquid and lowered in temperature. Air movement over the condenser is provided by a fan
mounted on the standby motor.
A portion of the condenser is occupied by the subcooler. Refrigerant leaving the receiver is passed through the
subcooler where additional heat is removed. Removal of this additional heat helps to ensure that only liquid refrig-
erant enters the thermal expansion valve.
62-11863

Figure 2.11 Cylinder Head - Loaded

2 3
8
9
14
15
- - - - -
2-14
4
7
5
11
6
10
9. Strainer
10. Suction manifold
11. Cylinder discharge valve
12. Valve plate
13. Cylinder suction plate
14. Discharge piston check valve assembly
15. Discharge manifold
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