Lennox CLIMATIC II User Manual

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SPECIFIC VALVES FOR SCREW COMPRESSORS
Liquid injection valve using intermediate suction
Function
To reduce the compressor discharge temperature thereby improving cooling on the compressor motor.
Description
The liquid injection valve INJLmn is open if:
. the compressor COMPmn is in operation
and . the discharge temperature TREFmn is greater than 100°C or the economy valve ECOmn is opened.
INJLmn is kept open as long as:
. the compressor COMPmn is in operation
and . the discharge temperature TREFmn is greater than 90°C or the economy valve ECOmn is opened.
Economy valve
Function
To increase refrigerating capacity by increased sub-cooling of the liquid refrigerant output from the condenser.
Description
The economy valve ECOmn is open if:
. compressor COMPmn is in operation and at full capacity for 2 minutes
and . the discharge temperature TREFmn is greater than 
and . high pressure in circuit n PTHPn is greater than P1.
ECOmn is kept open as long as:
. compressor COMPmn is in operation and at full capacity
and . the discharge temperature TREFmn is greater than -2°C
and . high pressure in circuit n PTHPn is greater than P2.
θ (°C)
P1 (absolute bar) P2 (absolute bar)
R22 65 11,9 11,2
R134a 40 7,7 6,7
R407C 45 13,5 11,7

Lennox CLIMATIC II Specifications

General

Brand	Lennox
Model	CLIMATIC II
Category	Control Unit
Language	English