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Should have a 4 ton two stage. Bypass should be 14 inches, minimum 12 inches. Your system will not work correctly unless it is a two stage system. reason if it is not a two stage you are trying to dump 4 tons of air into an area 450 square ft. Your bypass is only good for 230 to275 cfm.
Anymore questions. Russ
If you have nominee questions I will sign out for rating. You can always get back to me for follow up. Russ