Thermo King CRR-40 119, Руководство пользователя

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Dehumidification Flow and Pressure Diagram
Flow and Pressure Diagram
CRR-40
Dehumidification
32. Dehumidify Solenoid Valve (DSV)
Is a normally OPEN valve.
If the container humidity is 2% or more above the humidity setpoint
and the KVQ valve has reduced cooling capacity by about 25%, the
controller will energize (CLOSE) the normally open solenoid. This
closes refrigerant distribution to 50% of the evaporator coil, thereby
lowering the temperature of the active part of the coil and condensing
more moisture from the container air.
22. Electric Heaters
If the container humidity is 5% or more above the humidity setpoint,
and the KVQ valve has closed to reduce cooling capacity by about
50%, the controller will pulse the electric heaters ON and OFF. This
increases the cooling load on the evaporator coil, thereby lowering
the temperature of the entire coil and condensing more moisture from
the container air.
33. Humidity Sensor (rH)
The humidity sensor is located at the top right hand side of the evap-
orator fan deck and measures the humidity of the return air from the
cargo space.
High pressure gas
High pressure liquid
Low pressure gas
Low pressure liquid
Condensing high pressure gas
Low pressure vaporizing liquid
Liquid refrigerant injection