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Thread: Low suction, high superheat.
08-06-2008, 04:02 AM #1
Low suction, high superheat.
My first post here. We got a cooling cabinet, for cooling dampening solution for a printing press. 2 Compressors- ManeuropMT64 (R22) tandem , it's got plate HE for condensing and a plate HE for evaporating. Head 213 (14bar) Suction 41(2.9bar) at 78°F ambient. Subcooling 8°C, superheat 20°C. TXV Danfoss Tex2. There's an oil separator installed but it's undersized as oil circulates.
Liquid line filter OK and no pressure drop across liquid line. Also there's a suction line filter installed (no pressure drop across it thought).
When i looked at the sight glass i could see the refrigerant running.
I was told that for a system on R22 the suction pressure should be 68psi.